PL70803B1 - The method of processing lead dust from copper smelters in a shaft furnace. The subject of the invention is a method of processing lead dust from copper smelters into metal lead and copper-lead stone in a furnace. In the process of copper production, as a by-product in the final stage of dust removal in electrofilters, two types of lead dust, i.e. shaft dust in which the lead is in the form of lead sulphide, and blister dust in which the lead is in the form of lead sulphate. An exemplary chemical composition of lead dust from copper boots in percent by weight is the copper charge in the briquetting process of copper concentrates and then smelting the briquettes in a shaft furnace to obtain copper matte. The lead contained in the charge is concentrated again in the shaft dust during the melting of the charge in the shaft furnace and partly in the copper matte, and then concentrated in the converter dust during the conversion of the copper matte. Part of the lead from the charge passes into the slag and is discharged from the production cycle with a problem. The main disadvantage of this method is the continuous recycling of lead in the production cycle. Lead dust from copper smelters is processed in shaft furnaces for the production of copper matte in to recover the copper they contain. This method consists in adding dust to copper, as a result of which there is a large loss of this metal in the waste slag. Another method consists in calcining and sintering the lead dust on a sinter belt, including roasting and sintering galena, and processing the resulting sinter in a shaft furnace for producing lead. The disadvantages of this method are the difficulties in sintering the charge containing lead dust from copper smelters and introducing into the production cycle lead, large amounts of copper and bismuth, which are harmful admixtures in the lead production process. Moreover, the processing of lead dusts with the above methods does not allow for the recovery of other accompanying metals, especially rhenium. The object of the invention is to overcome these disadvantages by using a process for the processing of lead dust from copper smelters which enables the simultaneous recovery of copper and lead and other accompanying metals, in particular rhenium. The method of processing lead dust from smelters developed according to the invention is as follows. The lead dusts are briquetted or pelleted on disk granulator to give granules of 10 - 30 mm. In the pelleting process, the addition of binder, for example sulphite slurry, is used in an amount of 5 to 15% by weight, based on the granular dust. Then the briquettes or granules are melted in a shaft furnace without their initial roasting, using technological additives such as: iron scrap in the amount of 3-12%, quicklime in the amount of 2-4% and slag obtained in the stone converting process in an amount of 8-20% by weight in relation to the melted dust. An exemplary chemical composition of the convertible waste used as a technological additive in the process of smelting lead dust in percent by weight is as follows: 4.92% of copper, 45.70% of iron, 1.69% of sulfur, 1.11% Lead, 25.28% Silica, 4.02% Calcium Oxide, 1.72% Magnesium Oxide, and 2.11% Alumina. The size of the pieces of iron scrap, quicklime and converter slag to be loaded into the shaft furnace should be 10-80 mm, preferably 25-50 mm. The products obtained by the method according to the invention of processing lead dust from copper smelters in a shaft furnace are: crude lead containing at least 92% by weight of lead, copper-lead stone containing 10-20% of lead, 10-25% lead and 8-30% sulfur. % by weight, a zuzel containing no more than 5% lead and 1% by weight of copper, and shaft dust. Volatile metals or volatile metal compounds, especially rhenium, are concentrated in the shaft dusts, which allows for further processing of these dusts in order to recover rhenium. The remelting products are continuously discharged from the furnace into the clarifier, where the lead, copper-lead matte and slag are separated by gravity. In order to reduce the lead content in the copper-lead matte and to reduce the sulfur content of the crude lead, the iron scrap is added to the settler in an amount of 3-6% by weight in total in relation to the amount of lead, copper-lead matte and slag. . The sludge is discharged through the overflow opening, while the lead and copper-lead stone are discharged separately through the lower drain opening. The crude lead is further processed in lead smelters, while the copper-lead matte is processed in converters for the recovery of copper by known methods. The process of smelting lead dust from copper smelters in a shaft furnace can be carried out both without and with the use of hot blast, enrichment of the blast with oxygen and adding coal dust through nozzles. In order to ensure the proper course of the decomposition of lead sulphates, the lead dust smelting process in the shaft furnace should be conducted so that the height of the charge layer in the furnace does not exceed 2 meters, while the temperature of the top gases should be 150 to 300 ° C. The use of the method according to the invention enables the economical use of lead dust from copper smelters by simultaneously recovering lead and copper therefrom, and enables further processing of secondary shaft dusts for the recovery of rhenium therefrom. Claims 1. The method of processing granulated or briquetted lead dust from copper smelters in a shaft furnace, characterized in that lead dust, in which lead is in the form of lead sulphides and sulphates, is melted directly in a shaft furnace, without preliminary - they are in the form of oxides in the roasting process. 2. The method according to claim A process according to claim 1, characterized in that in the process of smelting lead dust in a shaft furnace, technological additives are used, such as iron scrap in the amount of 3-12%, preferably 4-8% by weight, quicklime in the amount of 2-6%, and preferably 2-6%. 4% by weight and converter zuzel in the amount of 8-20%, preferably 10-12% by weight, based on the melted lead dust. - Google Patents
The method of processing lead dust from copper smelters in a shaft furnace. The subject of the invention is a method of processing lead dust from copper smelters into metal lead and copper-lead stone in a furnace. In the process of copper production, as a by-product in the final stage of dust removal in electrofilters, two types of lead dust, i.e. shaft dust in which the lead is in the form of lead sulphide, and blister dust in which the lead is in the form of lead sulphate. An exemplary chemical composition of lead dust from copper boots in percent by weight is the copper charge in the briquetting process of copper concentrates and then smelting the briquettes in a shaft furnace to obtain copper matte. The lead contained in the charge is concentrated again in the shaft dust during the melting of the charge in the shaft furnace and partly in the copper matte, and then concentrated in the converter dust during the conversion of the copper matte. Part of the lead from the charge passes into the slag and is discharged from the production cycle with a problem. The main disadvantage of this method is the continuous recycling of lead in the production cycle. Lead dust from copper smelters is processed in shaft furnaces for the production of copper matte in to recover the copper they contain. This method consists in adding dust to copper, as a result of which there is a large loss of this metal in the waste slag. Another method consists in calcining and sintering the lead dust on a sinter belt, including roasting and sintering galena, and processing the resulting sinter in a shaft furnace for producing lead. The disadvantages of this method are the difficulties in sintering the charge containing lead dust from copper smelters and introducing into the production cycle lead, large amounts of copper and bismuth, which are harmful admixtures in the lead production process. Moreover, the processing of lead dusts with the above methods does not allow for the recovery of other accompanying metals, especially rhenium. The object of the invention is to overcome these disadvantages by using a process for the processing of lead dust from copper smelters which enables the simultaneous recovery of copper and lead and other accompanying metals, in particular rhenium. The method of processing lead dust from smelters developed according to the invention is as follows. The lead dusts are briquetted or pelleted on disk granulator to give granules of 10 - 30 mm. In the pelleting process, the addition of binder, for example sulphite slurry, is used in an amount of 5 to 15% by weight, based on the granular dust. Then the briquettes or granules are melted in a shaft furnace without their initial roasting, using technological additives such as: iron scrap in the amount of 3-12%, quicklime in the amount of 2-4% and slag obtained in the stone converting process in an amount of 8-20% by weight in relation to the melted dust. An exemplary chemical composition of the convertible waste used as a technological additive in the process of smelting lead dust in percent by weight is as follows: 4.92% of copper, 45.70% of iron, 1.69% of sulfur, 1.11% Lead, 25.28% Silica, 4.02% Calcium Oxide, 1.72% Magnesium Oxide, and 2.11% Alumina. The size of the pieces of iron scrap, quicklime and converter slag to be loaded into the shaft furnace should be 10-80 mm, preferably 25-50 mm. The products obtained by the method according to the invention of processing lead dust from copper smelters in a shaft furnace are: crude lead containing at least 92% by weight of lead, copper-lead stone containing 10-20% of lead, 10-25% lead and 8-30% sulfur. % by weight, a zuzel containing no more than 5% lead and 1% by weight of copper, and shaft dust. Volatile metals or volatile metal compounds, especially rhenium, are concentrated in the shaft dusts, which allows for further processing of these dusts in order to recover rhenium. The remelting products are continuously discharged from the furnace into the clarifier, where the lead, copper-lead matte and slag are separated by gravity. In order to reduce the lead content in the copper-lead matte and to reduce the sulfur content of the crude lead, the iron scrap is added to the settler in an amount of 3-6% by weight in total in relation to the amount of lead, copper-lead matte and slag. . The sludge is discharged through the overflow opening, while the lead and copper-lead stone are discharged separately through the lower drain opening. The crude lead is further processed in lead smelters, while the copper-lead matte is processed in converters for the recovery of copper by known methods. The process of smelting lead dust from copper smelters in a shaft furnace can be carried out both without and with the use of hot blast, enrichment of the blast with oxygen and adding coal dust through nozzles. In order to ensure the proper course of the decomposition of lead sulphates, the lead dust smelting process in the shaft furnace should be conducted so that the height of the charge layer in the furnace does not exceed 2 meters, while the temperature of the top gases should be 150 to 300 ° C. The use of the method according to the invention enables the economical use of lead dust from copper smelters by simultaneously recovering lead and copper therefrom, and enables further processing of secondary shaft dusts for the recovery of rhenium therefrom. Claims 1. The method of processing granulated or briquetted lead dust from copper smelters in a shaft furnace, characterized in that lead dust, in which lead is in the form of lead sulphides and sulphates, is melted directly in a shaft furnace, without preliminary - they are in the form of oxides in the roasting process. 2. The method according to claim A process according to claim 1, characterized in that in the process of smelting lead dust in a shaft furnace, technological additives are used, such as iron scrap in the amount of 3-12%, preferably 4-8% by weight, quicklime in the amount of 2-6%, and preferably 2-6%. 4% by weight and converter zuzel in the amount of 8-20%, preferably 10-12% by weight, based on the melted lead dust. Download PDFInfo
- Publication number
- PL70803B1 PL70803B1 PL12986968A PL12986968A PL70803B1 PL 70803 B1 PL70803 B1 PL 70803B1 PL 12986968 A PL12986968 A PL 12986968A PL 12986968 A PL12986968 A PL 12986968A PL 70803 B1 PL70803 B1 PL 70803B1
- Authority
- PL
- Poland
- Prior art keywords
- lead
- copper
- dust
- weight
- smelters
- Prior art date
Links
- 239000000428 dust Substances 0.000 title claims description 54
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims description 53
- 229910052802 copper Inorganic materials 0.000 title claims description 53
- 239000010949 copper Substances 0.000 title claims description 53
- 238000000034 method Methods 0.000 title claims description 46
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 22
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 title claims description 12
- 229910052742 iron Inorganic materials 0.000 title claims description 11
- 238000003723 Smelting Methods 0.000 title claims description 9
- 239000000292 calcium oxide Substances 0.000 title claims description 7
- 235000012255 calcium oxide Nutrition 0.000 title claims description 7
- 239000000654 additive Substances 0.000 title claims description 6
- 150000003467 sulfuric acid derivatives Chemical class 0.000 title claims description 4
- 150000004763 sulfides Chemical class 0.000 title claims 2
- WIKSRXFQIZQFEH-UHFFFAOYSA-N [Cu].[Pb] Chemical compound [Cu].[Pb] WIKSRXFQIZQFEH-UHFFFAOYSA-N 0.000 title description 14
- 238000004519 manufacturing process Methods 0.000 title description 13
- 239000002893 slag Substances 0.000 title description 13
- 229910052702 rhenium Inorganic materials 0.000 title description 10
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 title description 10
- 229910052751 metal Inorganic materials 0.000 title description 9
- 239000002184 metal Substances 0.000 title description 9
- 238000011084 recovery Methods 0.000 title description 8
- 239000004575 stone Substances 0.000 title description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title description 7
- 229910052717 sulfur Inorganic materials 0.000 title description 7
- 239000011593 sulfur Substances 0.000 title description 7
- 238000005245 sintering Methods 0.000 title description 6
- 150000002739 metals Chemical class 0.000 title description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title description 4
- 239000008187 granular material Substances 0.000 title description 4
- XCAUINMIESBTBL-UHFFFAOYSA-N lead(ii) sulfide Chemical compound [Pb]=S XCAUINMIESBTBL-UHFFFAOYSA-N 0.000 title description 4
- 239000000203 mixture Substances 0.000 title description 4
- 239000000047 product Substances 0.000 title description 4
- 239000000126 substance Substances 0.000 title description 4
- 239000002699 waste material Substances 0.000 title description 4
- 238000002844 melting Methods 0.000 title description 3
- 230000008018 melting Effects 0.000 title description 3
- KEQXNNJHMWSZHK-UHFFFAOYSA-L 1,3,2,4$l^{2}-dioxathiaplumbetane 2,2-dioxide Chemical compound [Pb+2].[O-]S([O-])(=O)=O KEQXNNJHMWSZHK-UHFFFAOYSA-L 0.000 title description 2
- 230000000996 additive effect Effects 0.000 title description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title description 2
- 239000011230 binding agent Substances 0.000 title description 2
- 229910052797 bismuth Inorganic materials 0.000 title description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 title description 2
- 239000006227 byproduct Substances 0.000 title description 2
- 238000001354 calcination Methods 0.000 title description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 title description 2
- 238000006243 chemical reaction Methods 0.000 title description 2
- 239000002817 coal dust Substances 0.000 title description 2
- 239000012141 concentrate Substances 0.000 title description 2
- 238000000354 decomposition reaction Methods 0.000 title description 2
- 229910052949 galena Inorganic materials 0.000 title description 2
- 230000005484 gravity Effects 0.000 title description 2
- 239000000395 magnesium oxide Substances 0.000 title description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 title description 2
- 150000002736 metal compounds Chemical class 0.000 title description 2
- 229910052760 oxygen Inorganic materials 0.000 title description 2
- 239000001301 oxygen Substances 0.000 title description 2
- 238000004064 recycling Methods 0.000 title description 2
- 239000000377 silicon dioxide Substances 0.000 title description 2
- 239000010802 sludge Substances 0.000 title description 2
- 239000002002 slurry Substances 0.000 title description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 title description 2
- 239000007789 gas Substances 0.000 title 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- XAQHXGSHRMHVMU-UHFFFAOYSA-N [S].[S] Chemical compound [S].[S] XAQHXGSHRMHVMU-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Description
Sposób przerobu pylów olowiowych z hut miedzi w piecu szybowym Przedmiotem wynalazku jest sposób przerobu pylów olowiowych z hut miedzi na olów meta¬ liczny i kamien miedziowo-olowiowy w piecu szybowym.W procesie produkcji miedzi jako produkt uboczny w ostatnim stadium odpylania w elek¬ trofiltrach, otrzymuje sie dwa rodzaje pylów olowiowych, to jest pyly szybowe w których olów znajduje sie w postaci siarczku olowiu oraz pyly konwertorowe w których olów znajduje sie w po¬ staci siarczanów olowiu.Przykladowy sklad chemiczny pylów olowiowych z but miedzi w procentach wagowych jest na¬ stepujacy: 10 2 wsadu miedzionosnego w procesie brykietowalnia koncentratów miedzi i nastepnie przetopie brykie¬ tów w piecu szybowym w celu uzyskania kamie¬ nia miedziowego. Zawarty we wsadzie olów pod¬ czas przetopu wsadu w piecu szybowym koncen¬ truje sie ponownie w pylach szybowych i czescio¬ wo w kamieniu miedziowym, nastepnie podczas konwertorowania kamienia miedziowego koncen¬ truje sie w pylach konwertorowych. Czesc olowiu ze wsadu przechodzi do zuzla i zostaje wyprowa¬ dzona z obiegu produkcyjnego z zuzlem zwalo¬ wym.Zasadnicza niedogodnoscia tego sposobu jest ciagle zawracanie olowiu w obiegu produkcyjnym pyly szybowe pyiy konwertorowe olów 40,52 48,40 miedz 3,82 4,47 zelazo 3,08 0,88 siarka ogó¬ lem 13,10 11,61 siarka siarcza¬ nowa 5,43 11,38 cynk 5,69 3V96 arsen 0,0095 0,0090 anty¬ mon 0,53 0,23 biz¬ mut 0,14 0,28 ren 0,010 0,0015 sre¬ bro 0,032 0,005 Pyly olowiowe z hut miedzi przerabia sie w pie¬ cach szybowych do produkcji kamienia miedzio¬ wego w celu odzysku zawartej w nich miedzi.Sposób ten polega na dodawaniu pylów do miedzi, wskutek czego nastepuja duze straty tego metalu w zuzlu odpadowym.Inny sposób polega na prazeniu i spiekaniu pylów olowiowych na tasmie spiekalnej lacznie 70 8033 70 803 4 z prazeniem i spiekaniem galeny i przerobie uzyskanego spieku w piecu szybowym do produk¬ cji olowiu. Niedogodnoscia tego sposobu sa trud¬ nosci spiekania wsadu zawierajacego pyly olowip- we z hut miedzi oraz wprowadzanie do obiegu produkcyjnego olowiu, znacznych ilosci miedzi i bizmutu, które w procesie produkcji olowiu sa domieszkami szkodliwymi.Ponadto przerób pylów olowiowych powyzszymi metodami nie pozwala na odzyskanie z nich innych metali towarzyszacych, a przede wszystkim renu.Celem wynalazku jest unikniecie tych niedogod¬ nosci przez zastosowanie sposobu przerobu pylów olowiowych z hut miedzi, który umozliwia jedno¬ czesny odzysk miedzi i olowiu oraz innych metali towarzyszacych a zwlaszcza renu.Opracowany wedlug wynalazku sposób przerobu pylów olowiowych z hut przedstawia sie nastepu¬ jaco. Pyly olowiowe brykietuje sie lub peletyzuje na granulatorach talerzowych w granulki o wiel¬ kosci 10 -^ 30 mm. W procesie peletyzowania sto¬ suje sie dodatek lepiszcza na przyklad lugu po¬ sulfitowego w ilosci 5—15% wagowych w stosun¬ ku do granulowanych pylów. Nastepnie brykiety lub granulki przetapia sie w piecu szybowym bez ich wstepnego prazenia stosujac dodatki techno¬ logiczne takie jak: zlom zelaza w ilosci 3—12%, wapno palone w ilosci 2—4% oraz zuzel uzyski¬ wany w procesie konwertorowania kamienia mie¬ dziowego w ilosci 8—20°/o wagowych w stosunku do przetapianych pylów.Przykladowy sklad chemiczny zuzla konwerto¬ rowego stosowanego jako dodatek technologiczny w procesie przetopu pylów olowiowych w procen¬ tach wagowych jest nastepujacy: 4,92°/o miedzi, 45,70% zelaza, 1,69% siarki, 1,11% olowiu, 25,28% krzemionki, 4,02% tlenku wapnia, 1,72% tlenku magnezu i 2,11% tlenku glinu.Wielkosc kawalków zlomu zelaza, wapna palo¬ nego i zuzla konwertorowego zaladowywanych do pieca szybowego winna wynosic 10—80 mm, a naj¬ lepiej 25—50 mm.Otrzymanymi sposobem wedlug wynalazku pro¬ duktami przerobu pylów olowiowych z hut miedzi w piecu szybowym sa: olów surowy zawierajacy minimum 92% wagowych olowiu, kamien miedzio- wo-olowiowy zawierajacy miedzi 10—20%, olowiu 10—25% i siarki 8—30% wagowych, zuzel zawie¬ rajacy najwyzej 5% olowiu i 1|% wagowych miedzi oraz pyly szybowe. W pylach szybowych koncen¬ truja sie lotne metale lub lotne zwiazki metali a przede wszystkim ren, co pozwala na dalsza przeróbke tych pylów w celu odzysku renu. 15 Produkty przetopu wypuszcza sie w sposób ciagly z pieca do odstojnika, gdzie nastepuje gra¬ witacyjne rozdzielenie olowiu, kamienia miedzio- wo-olowiowego i zuzla. W celu obnizenia zawar- 5 tosci olowiu w kamieniu miedziowo-olowiowym oraz zmniejszenia zawartosci siarki w olowiu su¬ rowym - do odstojnika dodaje sie zlomu zelaza w ilosci 3—6% wagowych lacznie w stosunku do ilosci olowiu, kamienia miedziowo-olowiowego io i zuzla.Z odstojnika wypuszcza sie zuzel otworem prze¬ lewowym, natomiast olów i kamien miedziowo- olowiowy oddzielnie dolnym otworem spustowym.Olów surowy poddaje sie dalszej przeróbce w hu¬ tach olowiu, natomiast kamien miedziowo-olowio- wy przerabia sie w konwertorach dla odzysku miedzi, znanymi sposobami.Ptroces przetopu pylów olowiowych z hut miedzi w piecu szybowym moze byc prowadzony zarówno bez jak i przy zastosowaniu goracego dmuchu, wzbogacaniu dmuchu w tlen oraz dodawaniu pylu weglowego poprzez dysze.Aby zapewnic prawidlowy przebieg rozkladu 25 siarczanów olowiu proces przetopu pyl6w olowio¬ wych w piecu szybowym nalezy prowadzic tak, aby wysokosc warstwy wsadu w piecu nie prze¬ kraczala 2 metrów, natomiast temperatura gazów gardzielowych powinna wynosic 150 do 300°C. 30 Zastosowanie sposobu wedlug wynalazku umozli¬ wia ekonomiczne wykorzystanie pylów olowio¬ wych z hut miedzi, poprzez jednoczesny odzysk z nich olowiu i miedzi oraz umozliwia dalsza prze¬ róbke wtórnych pylów szybowych w celu odzysku 35 z nich renu. PL PLMethod of processing lead dust from copper smelters in a shaft furnace The subject of the invention is a method of processing lead dust from copper smelters into metal lead and copper-lead matte in a shaft furnace. In the process of copper production as a by-product in the last stage of dust removal in electrofilters, two types of lead dust are obtained, i.e. shaft dust in which the lead is in the form of lead sulphide and blister dust in which the lead is in the form of lead sulphate. An exemplary chemical composition of lead dust from copper boots in percent by weight is as follows: : 10 2 copper-bearing charge in the process of briquetting copper concentrates and then melting the briquettes in a shaft furnace to obtain copper matte. The lead contained in the charge is concentrated again in the shaft dust during the melting of the charge in the shaft furnace and partly in the copper matte, and then concentrated in the converter dust during the conversion of the copper matte. Part of the lead from the charge passes into the slag and is discharged from the production cycle with a slowdown. The main disadvantage of this method is the continuous recycling of lead in the production circuit shaft dust, converter dust lead 40.52 48.40 copper 3.82 4.47 iron 3.08 0.88 total sulfur 13.10 11.61 sulfur sulfur 5.43 11.38 zinc 5.69 3V96 arsenic 0.0095 0.0090 antimony 0.53 0.23 b mut 0.14 0.28 rhenium 0.010 0.0015 silver 0.032 0.005 lead dusts from copper smelters are processed in shaft furnaces for the production of copper matte in order to recover the copper contained therein. This method consists in adding the dust to of copper, which results in large losses of this metal in the waste slag. Another method consists in calcining and sintering the lead dust on a sinterable belt in total 70 8033 70 803 4 with galena roasting and sintering and processing the resulting sinter in a shaft furnace for the production of lead. The disadvantages of this method are the difficulties in sintering the charge containing lead dust from copper smelters and introducing into the production cycle lead, large amounts of copper and bismuth, which are harmful admixtures in the lead production process. Moreover, the processing of lead dust using the above methods does not allow for recovery from The aim of the invention is to avoid these disadvantages by using a method of processing lead dust from copper smelters, which enables the simultaneous recovery of copper and lead and other accompanying metals, in particular rhenium. lead dust from the smelters is as follows. The lead dusts are briquetted or pelleted on disk granulator to give granules of 10 - 30 mm. In the pelleting process, the addition of a binder, for example sulphite slurry, is used in an amount of 5 to 15% by weight, in relation to the granulated dusts. Then the briquettes or granules are melted in a shaft furnace without their initial roasting, using technological additives such as: iron scrap in the amount of 3-12%, quicklime in the amount of 2-4% and slag obtained in the process of converting copper stone. in the amount of 8-20% by weight in relation to the melted dusts. An exemplary chemical composition of the convertible waste used as a technological additive in the process of remelting lead dust, in percent by weight, is as follows: 4.92% of copper, 45.70 % iron, 1.69% sulfur, 1.11% lead, 25.28% silica, 4.02% calcium oxide, 1.72% magnesium oxide and 2.11% alumina. Amount of scrap iron, lime and the converter slag loaded into the shaft furnace should be 10-80 mm, and preferably 25-50 mm. The products obtained by the process according to the invention for the processing of lead dust from copper smelters in the shaft furnace are: crude lead containing at least 92% by weight of lead , copper-lead stone containing copper 1 0-20% lead, 10-25% lead and 8-30% sulfur by weight, a slag containing no more than 5% lead and 1% by weight copper, and shaft dust. Volatile metals or volatile metal compounds, especially rhenium, are concentrated in the shaft dusts, which allows for further processing of these dusts in order to recover rhenium. The smelting products are continuously discharged from the furnace into the clarifier, where the lead, copper-lead matte and slag are separated by gravity. In order to reduce the lead content in the copper-lead matte and to reduce the sulfur content of the crude lead, the iron scrap is added to the settler in an amount of 3-6% by weight in total in relation to the amount of lead, copper-lead matte and slag. The sludge is discharged from the decanter through the overflow opening, while the lead and copper-lead stone are discharged separately through the lower tapping hole. The raw lead is further processed in lead smelters, while the copper-lead stone is processed in converters for the recovery of copper. The process of smelting lead dust from copper smelters in a shaft furnace can be carried out both without and with the use of hot blast, enriching the blast with oxygen and adding coal dust through nozzles. In order to ensure the correct course of decomposition of 25 lead sulphates, the process of smelting lead dust in a shaft furnace should be carried out so that the height of the charge layer in the furnace does not exceed 2 meters, while the temperature throat lines should be 150 to 300 ° C. The use of the method according to the invention enables the economical use of lead dust from copper smelters by simultaneously recovering lead and copper therefrom, and enables further processing of secondary shaft dusts for the recovery of rhenium therefrom. PL PL
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL12986968A PL70803B1 (en) | 1968-11-02 | 1968-11-02 | The method of processing lead dust from copper smelters in a shaft furnace. The subject of the invention is a method of processing lead dust from copper smelters into metal lead and copper-lead stone in a furnace. In the process of copper production, as a by-product in the final stage of dust removal in electrofilters, two types of lead dust, i.e. shaft dust in which the lead is in the form of lead sulphide, and blister dust in which the lead is in the form of lead sulphate. An exemplary chemical composition of lead dust from copper boots in percent by weight is the copper charge in the briquetting process of copper concentrates and then smelting the briquettes in a shaft furnace to obtain copper matte. The lead contained in the charge is concentrated again in the shaft dust during the melting of the charge in the shaft furnace and partly in the copper matte, and then concentrated in the converter dust during the conversion of the copper matte. Part of the lead from the charge passes into the slag and is discharged from the production cycle with a problem. The main disadvantage of this method is the continuous recycling of lead in the production cycle. Lead dust from copper smelters is processed in shaft furnaces for the production of copper matte in to recover the copper they contain. This method consists in adding dust to copper, as a result of which there is a large loss of this metal in the waste slag. Another method consists in calcining and sintering the lead dust on a sinter belt, including roasting and sintering galena, and processing the resulting sinter in a shaft furnace for producing lead. The disadvantages of this method are the difficulties in sintering the charge containing lead dust from copper smelters and introducing into the production cycle lead, large amounts of copper and bismuth, which are harmful admixtures in the lead production process. Moreover, the processing of lead dusts with the above methods does not allow for the recovery of other accompanying metals, especially rhenium. The object of the invention is to overcome these disadvantages by using a process for the processing of lead dust from copper smelters which enables the simultaneous recovery of copper and lead and other accompanying metals, in particular rhenium. The method of processing lead dust from smelters developed according to the invention is as follows. The lead dusts are briquetted or pelleted on disk granulator to give granules of 10 - 30 mm. In the pelleting process, the addition of binder, for example sulphite slurry, is used in an amount of 5 to 15% by weight, based on the granular dust. Then the briquettes or granules are melted in a shaft furnace without their initial roasting, using technological additives such as: iron scrap in the amount of 3-12%, quicklime in the amount of 2-4% and slag obtained in the stone converting process in an amount of 8-20% by weight in relation to the melted dust. An exemplary chemical composition of the convertible waste used as a technological additive in the process of smelting lead dust in percent by weight is as follows: 4.92% of copper, 45.70% of iron, 1.69% of sulfur, 1.11% Lead, 25.28% Silica, 4.02% Calcium Oxide, 1.72% Magnesium Oxide, and 2.11% Alumina. The size of the pieces of iron scrap, quicklime and converter slag to be loaded into the shaft furnace should be 10-80 mm, preferably 25-50 mm. The products obtained by the method according to the invention of processing lead dust from copper smelters in a shaft furnace are: crude lead containing at least 92% by weight of lead, copper-lead stone containing 10-20% of lead, 10-25% lead and 8-30% sulfur. % by weight, a zuzel containing no more than 5% lead and 1% by weight of copper, and shaft dust. Volatile metals or volatile metal compounds, especially rhenium, are concentrated in the shaft dusts, which allows for further processing of these dusts in order to recover rhenium. The remelting products are continuously discharged from the furnace into the clarifier, where the lead, copper-lead matte and slag are separated by gravity. In order to reduce the lead content in the copper-lead matte and to reduce the sulfur content of the crude lead, the iron scrap is added to the settler in an amount of 3-6% by weight in total in relation to the amount of lead, copper-lead matte and slag. . The sludge is discharged through the overflow opening, while the lead and copper-lead stone are discharged separately through the lower drain opening. The crude lead is further processed in lead smelters, while the copper-lead matte is processed in converters for the recovery of copper by known methods. The process of smelting lead dust from copper smelters in a shaft furnace can be carried out both without and with the use of hot blast, enrichment of the blast with oxygen and adding coal dust through nozzles. In order to ensure the proper course of the decomposition of lead sulphates, the lead dust smelting process in the shaft furnace should be conducted so that the height of the charge layer in the furnace does not exceed 2 meters, while the temperature of the top gases should be 150 to 300 ° C. The use of the method according to the invention enables the economical use of lead dust from copper smelters by simultaneously recovering lead and copper therefrom, and enables further processing of secondary shaft dusts for the recovery of rhenium therefrom. Claims 1. The method of processing granulated or briquetted lead dust from copper smelters in a shaft furnace, characterized in that lead dust, in which lead is in the form of lead sulphides and sulphates, is melted directly in a shaft furnace, without preliminary - they are in the form of oxides in the roasting process. 2. The method according to claim A process according to claim 1, characterized in that in the process of smelting lead dust in a shaft furnace, technological additives are used, such as iron scrap in the amount of 3-12%, preferably 4-8% by weight, quicklime in the amount of 2-6%, and preferably 2-6%. 4% by weight and converter zuzel in the amount of 8-20%, preferably 10-12% by weight, based on the melted lead dust. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL12986968A PL70803B1 (en) | 1968-11-02 | 1968-11-02 | The method of processing lead dust from copper smelters in a shaft furnace. The subject of the invention is a method of processing lead dust from copper smelters into metal lead and copper-lead stone in a furnace. In the process of copper production, as a by-product in the final stage of dust removal in electrofilters, two types of lead dust, i.e. shaft dust in which the lead is in the form of lead sulphide, and blister dust in which the lead is in the form of lead sulphate. An exemplary chemical composition of lead dust from copper boots in percent by weight is the copper charge in the briquetting process of copper concentrates and then smelting the briquettes in a shaft furnace to obtain copper matte. The lead contained in the charge is concentrated again in the shaft dust during the melting of the charge in the shaft furnace and partly in the copper matte, and then concentrated in the converter dust during the conversion of the copper matte. Part of the lead from the charge passes into the slag and is discharged from the production cycle with a problem. The main disadvantage of this method is the continuous recycling of lead in the production cycle. Lead dust from copper smelters is processed in shaft furnaces for the production of copper matte in to recover the copper they contain. This method consists in adding dust to copper, as a result of which there is a large loss of this metal in the waste slag. Another method consists in calcining and sintering the lead dust on a sinter belt, including roasting and sintering galena, and processing the resulting sinter in a shaft furnace for producing lead. The disadvantages of this method are the difficulties in sintering the charge containing lead dust from copper smelters and introducing into the production cycle lead, large amounts of copper and bismuth, which are harmful admixtures in the lead production process. Moreover, the processing of lead dusts with the above methods does not allow for the recovery of other accompanying metals, especially rhenium. The object of the invention is to overcome these disadvantages by using a process for the processing of lead dust from copper smelters which enables the simultaneous recovery of copper and lead and other accompanying metals, in particular rhenium. The method of processing lead dust from smelters developed according to the invention is as follows. The lead dusts are briquetted or pelleted on disk granulator to give granules of 10 - 30 mm. In the pelleting process, the addition of binder, for example sulphite slurry, is used in an amount of 5 to 15% by weight, based on the granular dust. Then the briquettes or granules are melted in a shaft furnace without their initial roasting, using technological additives such as: iron scrap in the amount of 3-12%, quicklime in the amount of 2-4% and slag obtained in the stone converting process in an amount of 8-20% by weight in relation to the melted dust. An exemplary chemical composition of the convertible waste used as a technological additive in the process of smelting lead dust in percent by weight is as follows: 4.92% of copper, 45.70% of iron, 1.69% of sulfur, 1.11% Lead, 25.28% Silica, 4.02% Calcium Oxide, 1.72% Magnesium Oxide, and 2.11% Alumina. The size of the pieces of iron scrap, quicklime and converter slag to be loaded into the shaft furnace should be 10-80 mm, preferably 25-50 mm. The products obtained by the method according to the invention of processing lead dust from copper smelters in a shaft furnace are: crude lead containing at least 92% by weight of lead, copper-lead stone containing 10-20% of lead, 10-25% lead and 8-30% sulfur. % by weight, a zuzel containing no more than 5% lead and 1% by weight of copper, and shaft dust. Volatile metals or volatile metal compounds, especially rhenium, are concentrated in the shaft dusts, which allows for further processing of these dusts in order to recover rhenium. The remelting products are continuously discharged from the furnace into the clarifier, where the lead, copper-lead matte and slag are separated by gravity. In order to reduce the lead content in the copper-lead matte and to reduce the sulfur content of the crude lead, the iron scrap is added to the settler in an amount of 3-6% by weight in total in relation to the amount of lead, copper-lead matte and slag. . The sludge is discharged through the overflow opening, while the lead and copper-lead stone are discharged separately through the lower drain opening. The crude lead is further processed in lead smelters, while the copper-lead matte is processed in converters for the recovery of copper by known methods. The process of smelting lead dust from copper smelters in a shaft furnace can be carried out both without and with the use of hot blast, enrichment of the blast with oxygen and adding coal dust through nozzles. In order to ensure the proper course of the decomposition of lead sulphates, the lead dust smelting process in the shaft furnace should be conducted so that the height of the charge layer in the furnace does not exceed 2 meters, while the temperature of the top gases should be 150 to 300 ° C. The use of the method according to the invention enables the economical use of lead dust from copper smelters by simultaneously recovering lead and copper therefrom, and enables further processing of secondary shaft dusts for the recovery of rhenium therefrom. Claims 1. The method of processing granulated or briquetted lead dust from copper smelters in a shaft furnace, characterized in that lead dust, in which lead is in the form of lead sulphides and sulphates, is melted directly in a shaft furnace, without preliminary - they are in the form of oxides in the roasting process. 2. The method according to claim A process according to claim 1, characterized in that in the process of smelting lead dust in a shaft furnace, technological additives are used, such as iron scrap in the amount of 3-12%, preferably 4-8% by weight, quicklime in the amount of 2-6%, and preferably 2-6%. 4% by weight and converter zuzel in the amount of 8-20%, preferably 10-12% by weight, based on the melted lead dust. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL70803B1 true PL70803B1 (en) | 1974-04-30 |
Family
ID=19950217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL12986968A PL70803B1 (en) | 1968-11-02 | 1968-11-02 | The method of processing lead dust from copper smelters in a shaft furnace. The subject of the invention is a method of processing lead dust from copper smelters into metal lead and copper-lead stone in a furnace. In the process of copper production, as a by-product in the final stage of dust removal in electrofilters, two types of lead dust, i.e. shaft dust in which the lead is in the form of lead sulphide, and blister dust in which the lead is in the form of lead sulphate. An exemplary chemical composition of lead dust from copper boots in percent by weight is the copper charge in the briquetting process of copper concentrates and then smelting the briquettes in a shaft furnace to obtain copper matte. The lead contained in the charge is concentrated again in the shaft dust during the melting of the charge in the shaft furnace and partly in the copper matte, and then concentrated in the converter dust during the conversion of the copper matte. Part of the lead from the charge passes into the slag and is discharged from the production cycle with a problem. The main disadvantage of this method is the continuous recycling of lead in the production cycle. Lead dust from copper smelters is processed in shaft furnaces for the production of copper matte in to recover the copper they contain. This method consists in adding dust to copper, as a result of which there is a large loss of this metal in the waste slag. Another method consists in calcining and sintering the lead dust on a sinter belt, including roasting and sintering galena, and processing the resulting sinter in a shaft furnace for producing lead. The disadvantages of this method are the difficulties in sintering the charge containing lead dust from copper smelters and introducing into the production cycle lead, large amounts of copper and bismuth, which are harmful admixtures in the lead production process. Moreover, the processing of lead dusts with the above methods does not allow for the recovery of other accompanying metals, especially rhenium. The object of the invention is to overcome these disadvantages by using a process for the processing of lead dust from copper smelters which enables the simultaneous recovery of copper and lead and other accompanying metals, in particular rhenium. The method of processing lead dust from smelters developed according to the invention is as follows. The lead dusts are briquetted or pelleted on disk granulator to give granules of 10 - 30 mm. In the pelleting process, the addition of binder, for example sulphite slurry, is used in an amount of 5 to 15% by weight, based on the granular dust. Then the briquettes or granules are melted in a shaft furnace without their initial roasting, using technological additives such as: iron scrap in the amount of 3-12%, quicklime in the amount of 2-4% and slag obtained in the stone converting process in an amount of 8-20% by weight in relation to the melted dust. An exemplary chemical composition of the convertible waste used as a technological additive in the process of smelting lead dust in percent by weight is as follows: 4.92% of copper, 45.70% of iron, 1.69% of sulfur, 1.11% Lead, 25.28% Silica, 4.02% Calcium Oxide, 1.72% Magnesium Oxide, and 2.11% Alumina. The size of the pieces of iron scrap, quicklime and converter slag to be loaded into the shaft furnace should be 10-80 mm, preferably 25-50 mm. The products obtained by the method according to the invention of processing lead dust from copper smelters in a shaft furnace are: crude lead containing at least 92% by weight of lead, copper-lead stone containing 10-20% of lead, 10-25% lead and 8-30% sulfur. % by weight, a zuzel containing no more than 5% lead and 1% by weight of copper, and shaft dust. Volatile metals or volatile metal compounds, especially rhenium, are concentrated in the shaft dusts, which allows for further processing of these dusts in order to recover rhenium. The remelting products are continuously discharged from the furnace into the clarifier, where the lead, copper-lead matte and slag are separated by gravity. In order to reduce the lead content in the copper-lead matte and to reduce the sulfur content of the crude lead, the iron scrap is added to the settler in an amount of 3-6% by weight in total in relation to the amount of lead, copper-lead matte and slag. . The sludge is discharged through the overflow opening, while the lead and copper-lead stone are discharged separately through the lower drain opening. The crude lead is further processed in lead smelters, while the copper-lead matte is processed in converters for the recovery of copper by known methods. The process of smelting lead dust from copper smelters in a shaft furnace can be carried out both without and with the use of hot blast, enrichment of the blast with oxygen and adding coal dust through nozzles. In order to ensure the proper course of the decomposition of lead sulphates, the lead dust smelting process in the shaft furnace should be conducted so that the height of the charge layer in the furnace does not exceed 2 meters, while the temperature of the top gases should be 150 to 300 ° C. The use of the method according to the invention enables the economical use of lead dust from copper smelters by simultaneously recovering lead and copper therefrom, and enables further processing of secondary shaft dusts for the recovery of rhenium therefrom. Claims 1. The method of processing granulated or briquetted lead dust from copper smelters in a shaft furnace, characterized in that lead dust, in which lead is in the form of lead sulphides and sulphates, is melted directly in a shaft furnace, without preliminary - they are in the form of oxides in the roasting process. 2. The method according to claim A process according to claim 1, characterized in that in the process of smelting lead dust in a shaft furnace, technological additives are used, such as iron scrap in the amount of 3-12%, preferably 4-8% by weight, quicklime in the amount of 2-6%, and preferably 2-6%. 4% by weight and converter zuzel in the amount of 8-20%, preferably 10-12% by weight, based on the melted lead dust. |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL70803B1 (en) |
-
1968
- 1968-11-02 PL PL12986968A patent/PL70803B1/en unknown
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| PL70803B1 (en) | The method of processing lead dust from copper smelters in a shaft furnace. The subject of the invention is a method of processing lead dust from copper smelters into metal lead and copper-lead stone in a furnace. In the process of copper production, as a by-product in the final stage of dust removal in electrofilters, two types of lead dust, i.e. shaft dust in which the lead is in the form of lead sulphide, and blister dust in which the lead is in the form of lead sulphate. An exemplary chemical composition of lead dust from copper boots in percent by weight is the copper charge in the briquetting process of copper concentrates and then smelting the briquettes in a shaft furnace to obtain copper matte. The lead contained in the charge is concentrated again in the shaft dust during the melting of the charge in the shaft furnace and partly in the copper matte, and then concentrated in the converter dust during the conversion of the copper matte. Part of the lead from the charge passes into the slag and is discharged from the production cycle with a problem. The main disadvantage of this method is the continuous recycling of lead in the production cycle. Lead dust from copper smelters is processed in shaft furnaces for the production of copper matte in to recover the copper they contain. This method consists in adding dust to copper, as a result of which there is a large loss of this metal in the waste slag. Another method consists in calcining and sintering the lead dust on a sinter belt, including roasting and sintering galena, and processing the resulting sinter in a shaft furnace for producing lead. The disadvantages of this method are the difficulties in sintering the charge containing lead dust from copper smelters and introducing into the production cycle lead, large amounts of copper and bismuth, which are harmful admixtures in the lead production process. Moreover, the processing of lead dusts with the above methods does not allow for the recovery of other accompanying metals, especially rhenium. The object of the invention is to overcome these disadvantages by using a process for the processing of lead dust from copper smelters which enables the simultaneous recovery of copper and lead and other accompanying metals, in particular rhenium. The method of processing lead dust from smelters developed according to the invention is as follows. The lead dusts are briquetted or pelleted on disk granulator to give granules of 10 - 30 mm. In the pelleting process, the addition of binder, for example sulphite slurry, is used in an amount of 5 to 15% by weight, based on the granular dust. Then the briquettes or granules are melted in a shaft furnace without their initial roasting, using technological additives such as: iron scrap in the amount of 3-12%, quicklime in the amount of 2-4% and slag obtained in the stone converting process in an amount of 8-20% by weight in relation to the melted dust. An exemplary chemical composition of the convertible waste used as a technological additive in the process of smelting lead dust in percent by weight is as follows: 4.92% of copper, 45.70% of iron, 1.69% of sulfur, 1.11% Lead, 25.28% Silica, 4.02% Calcium Oxide, 1.72% Magnesium Oxide, and 2.11% Alumina. The size of the pieces of iron scrap, quicklime and converter slag to be loaded into the shaft furnace should be 10-80 mm, preferably 25-50 mm. The products obtained by the method according to the invention of processing lead dust from copper smelters in a shaft furnace are: crude lead containing at least 92% by weight of lead, copper-lead stone containing 10-20% of lead, 10-25% lead and 8-30% sulfur. % by weight, a zuzel containing no more than 5% lead and 1% by weight of copper, and shaft dust. Volatile metals or volatile metal compounds, especially rhenium, are concentrated in the shaft dusts, which allows for further processing of these dusts in order to recover rhenium. The remelting products are continuously discharged from the furnace into the clarifier, where the lead, copper-lead matte and slag are separated by gravity. In order to reduce the lead content in the copper-lead matte and to reduce the sulfur content of the crude lead, the iron scrap is added to the settler in an amount of 3-6% by weight in total in relation to the amount of lead, copper-lead matte and slag. . The sludge is discharged through the overflow opening, while the lead and copper-lead stone are discharged separately through the lower drain opening. The crude lead is further processed in lead smelters, while the copper-lead matte is processed in converters for the recovery of copper by known methods. The process of smelting lead dust from copper smelters in a shaft furnace can be carried out both without and with the use of hot blast, enrichment of the blast with oxygen and adding coal dust through nozzles. In order to ensure the proper course of the decomposition of lead sulphates, the lead dust smelting process in the shaft furnace should be conducted so that the height of the charge layer in the furnace does not exceed 2 meters, while the temperature of the top gases should be 150 to 300 ° C. The use of the method according to the invention enables the economical use of lead dust from copper smelters by simultaneously recovering lead and copper therefrom, and enables further processing of secondary shaft dusts for the recovery of rhenium therefrom. Claims 1. The method of processing granulated or briquetted lead dust from copper smelters in a shaft furnace, characterized in that lead dust, in which lead is in the form of lead sulphides and sulphates, is melted directly in a shaft furnace, without preliminary - they are in the form of oxides in the roasting process. 2. 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