RU2425179C2 - Procedure for processing salt slag (slaked lime) formed at aluminium producing electrolyser shut down for repair - Google Patents
Procedure for processing salt slag (slaked lime) formed at aluminium producing electrolyser shut down for repair Download PDFInfo
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- RU2425179C2 RU2425179C2 RU2009117054A RU2009117054A RU2425179C2 RU 2425179 C2 RU2425179 C2 RU 2425179C2 RU 2009117054 A RU2009117054 A RU 2009117054A RU 2009117054 A RU2009117054 A RU 2009117054A RU 2425179 C2 RU2425179 C2 RU 2425179C2
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- salt slag
- repair
- processing
- crushing
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- 150000003839 salts Chemical class 0.000 title claims abstract description 29
- 239000002893 slag Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 14
- 229910052782 aluminium Inorganic materials 0.000 title claims description 14
- 239000004411 aluminium Substances 0.000 title 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 title 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 title 1
- 235000011116 calcium hydroxide Nutrition 0.000 title 1
- 239000000920 calcium hydroxide Substances 0.000 title 1
- 238000005188 flotation Methods 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 239000000243 solution Substances 0.000 claims description 16
- 238000000227 grinding Methods 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 12
- 229910021529 ammonia Inorganic materials 0.000 abstract description 6
- 239000012141 concentrate Substances 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000005272 metallurgy Methods 0.000 abstract description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 abstract 2
- 239000007832 Na2SO4 Substances 0.000 abstract 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract 1
- 230000003750 conditioning effect Effects 0.000 abstract 1
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 abstract 1
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract 1
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009856 non-ferrous metallurgy Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- VRAIHTAYLFXSJJ-UHFFFAOYSA-N alumane Chemical compound [AlH3].[AlH3] VRAIHTAYLFXSJJ-UHFFFAOYSA-N 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 229910001610 cryolite Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 125000001153 fluoro group Chemical class F* 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Electrolytic Production Of Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Изобретение относится к области цветной металлургии, к электролитическому получению алюминия.The invention relates to the field of non-ferrous metallurgy, to the electrolytic production of aluminum.
Известен способ электротермической переработки солевого шлака, образующегося при отключении электролизера для производства алюминия в ремонт, путем переплавки на действующих электролизерах для производства алюминия (И.А.Троицкий, В.А.Железнов. Металлургия алюминия. Учебное пособие для техникумов цветной металлургии. М.: Металлургия, 1977. 392 с.).There is a method of electrothermal processing of salt slag formed when the electrolyzer is turned off for aluminum production for repair, by smelting on existing electrolysis cells for aluminum production (I.A. Troitsky, V.A.Zheleznov. Aluminum metallurgy. A training manual for technical schools of non-ferrous metallurgy. M. : Metallurgy, 1977.392 s.).
Однако данный способ отличает попадание в действующие электролизеры для производства алюминия углерода (кусков отработанной футеровки), выделение аммиака в атмосферу корпусов электролиза, а также увеличение расхода фторсолей ввиду гидролиза соединений фтора.However, this method distinguishes the ingress of carbon into the existing electrolytic cells for the production of aluminum aluminum (pieces of spent lining), the release of ammonia into the atmosphere of the electrolysis bodies, as well as the increase in the consumption of fluorine salts due to the hydrolysis of fluorine compounds.
Известен способ переработки солевого шлака, образующегося при отключении электролизера для производства алюминия в ремонт, при мартеновском способе производства стали (Авторское свидетельство СССР № 1189883, С21С 5/04. Опубл. 07.11.1985. Бюл. № 41).There is a method of processing salt slag formed when the electrolyzer is turned off for the production of aluminum for repair, with the open-hearth method of steel production (USSR Author's Certificate No. 1189883, C21C 5/04. Publish. 07.11.1985. Bull. No. 41).
Однако данный способ отличает ограниченность возможности переработки солевого шлака ввиду высокой влажности материала.However, this method is distinguished by the limited possibility of processing salt slag due to the high humidity of the material.
Задачей предлагаемого технического решения является переработка солевого шлака, образующегося при отключении электролизера для производства алюминия в ремонт, с получением фторглиноземсодержащего концентрата (вторичного криолита) необходимой влажности при недопущении выделения аммиака в рабочую зону обслуживающего персонала при переработке.The objective of the proposed technical solution is the processing of salt slag generated when the electrolyzer is turned off for aluminum production for repair, with the production of a fluorine-alumina-containing concentrate (secondary cryolite) of the necessary moisture content while preventing ammonia from being released into the working area of the maintenance personnel during processing.
Технический результат заключается в подавлении выделения аммиака из солевого шлака посредством его предварительной заливки фторсодобикарбонатным раствором.The technical result is to suppress the release of ammonia from salt slag by pre-pouring it with a fluorosodobicarbonate solution.
Поставленная задача достигается тем, что в способе переработки солевого шлака (пушонки), образующегося при отключении электролизера для производства алюминия в ремонт, согласно предлагаемому изобретению, для подавления выделения аммиака в рабочую зону обслуживающего персонала при переработке, солевой шлак на 1-72 часа предварительно заливается фторсодобикарбонатным раствором с концентрацией Na2CO3 10-40 г/литр, NaHCO3 0-10 г/литр, NaF 0-5 г/литр, Na2SO4 10-70 г/литр температурой 50-85 градусов Цельсия. Стадия заливки/выдерживания солевого шлака фторсодобикарбонатным раствором и стадия дробления/измельчения солевого шлака могут быть совмещены. Последующая переработка солевого шлака на фторглиноземсодержащий концентрат (очистка от углерода) производится флотационным методом.This object is achieved in that in the method for processing salt slag (fluff) formed when the electrolyzer is turned off for aluminum production for repair, according to the invention, in order to suppress the release of ammonia into the working area of the staff during processing, salt slag is pre-filled for 1-72 hours fluorosodobicarbonate solution with a concentration of Na 2 CO 3 10-40 g / liter, NaHCO 3 0-10 g / liter, NaF 0-5 g / liter, Na 2 SO 4 10-70 g / liter with a temperature of 50-85 degrees Celsius. The step of pouring / curing the salt slag with a fluorosodobicarbonate solution and the step of crushing / grinding the salt slag can be combined. Subsequent processing of salt slag into a fluorine-alumina-containing concentrate (carbon removal) is carried out by the flotation method.
Таким образом, заявляемый способ переработки солевого шлака (пушонки), образующегося при отключении электролизера для производства алюминия в ремонт, соответствует критерию «новизна».Thus, the inventive method of processing salt slag (fluff), formed when the electrolyzer is turned off for the production of aluminum for repair, meets the criterion of "novelty."
Сравнение заявляемого решения с другими техническими решениями в данной области техники не позволило выявить в них признаки, отличающие заявляемое решение от других технических решений, что делает возможным сделать вывод о соответствии критерию «изобретательский уровень».Comparison of the claimed solution with other technical solutions in the given technical field did not reveal the features distinguishing the claimed solution from other technical solutions, which makes it possible to conclude that the criterion of "inventive step" is met.
Способ поясняется чертежом, где показана металлургическая схема переработки солевого шлака (пушонки), образующегося при отключении электролизера для производства алюминия в ремонт.The method is illustrated in the drawing, which shows a metallurgical scheme for the processing of salt slag (fluff), formed when the electrolyzer is turned off for the production of aluminum for repair.
Способ работает следующим образом.The method works as follows.
Солевой шлак предварительно заливается фторсодобикарбонатным водным раствором с концентрацией Na2CO3 10-40 г/литр, NaHCO3 0-10 г/литр, NaF 0-5 г/литр, Na2SO4 10-70 г/литр; при температуре раствора 50-85°С. Затем солевой шлак выдерживается в данном растворе в течение 1-72 часов, дробится и измельчается. Стадия заливки/выдерживания солевого шлака фторсодобикарбонатным раствором и стадия дробления/измельчения солевого шлака могут быть совмещены. Затем материал направляется на флотационное отделение углерода, фильтрацию и сушку.Salt slag is preliminarily poured with a fluorosodobicarbonate aqueous solution with a concentration of Na 2 CO 3 10-40 g / liter, NaHCO 3 0-10 g / liter, NaF 0-5 g / liter, Na 2 SO 4 10-70 g / liter; at a solution temperature of 50-85 ° C. Then, the salt slag is aged in this solution for 1-72 hours, crushed and ground. The step of pouring / curing the salt slag with a fluorosodobicarbonate solution and the step of crushing / grinding the salt slag can be combined. Then the material is sent to flotation separation of carbon, filtration and drying.
Сравнение признаков предлагаемого технического решения с известными аналогами выявило следующее. Известны способы переработки солевого шлака, образующегося при отключении электролизера для производства алюминия в ремонт, в действующих электролизерах и при мартеновском способе производства стали. Неизвестен способ переработки солевого шлака, образующегося при отключении электролизера для производства алюминия в ремонт, во фторглиноземсодержащий концентрат флотационным методом с подавлением выделения аммиака посредством предварительной заливки солевого шлака фторсодобикарбонатным раствором.A comparison of the features of the proposed technical solution with known analogues revealed the following. Known methods for processing salt slag formed when the electrolyzer is turned off for the production of aluminum for repair, in existing electrolyzers and with the open-hearth method of steel production. An unknown method of processing salt slag formed when the electrolyzer for aluminum production is turned off for repair is converted into a fluorine-alumina concentrate by the flotation method with suppressing ammonia emission by pre-pouring the salt slag with a fluorosodobicarbonate solution.
Это позволяет сделать вывод о соответствии предлагаемого технического решения изобретательскому уровню.This allows us to conclude that the proposed technical solution is inventive.
Таким образом, предлагаемое техническое решение позволяет перерабатывать солевой шлак, образующийся при отключении электролизера для производства алюминия в ремонт, с получением фторглиноземсодержащего концентрата необходимой влажности.Thus, the proposed technical solution allows the processing of salt slag generated when the electrolyzer is turned off for the production of aluminum for repair, to obtain a fluorine-alumina-containing concentrate of the required humidity.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2009117054A RU2425179C2 (en) | 2009-05-04 | 2009-05-04 | Procedure for processing salt slag (slaked lime) formed at aluminium producing electrolyser shut down for repair |
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| Application Number | Priority Date | Filing Date | Title |
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| RU2009117054A RU2425179C2 (en) | 2009-05-04 | 2009-05-04 | Procedure for processing salt slag (slaked lime) formed at aluminium producing electrolyser shut down for repair |
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| Publication Number | Publication Date |
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| RU2009117054A RU2009117054A (en) | 2010-11-10 |
| RU2425179C2 true RU2425179C2 (en) | 2011-07-27 |
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| RU2009117054A RU2425179C2 (en) | 2009-05-04 | 2009-05-04 | Procedure for processing salt slag (slaked lime) formed at aluminium producing electrolyser shut down for repair |
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| CN114308983B (en) * | 2021-12-29 | 2023-06-30 | 安徽今朝环保科技有限公司 | Device and method for cyclone separation and reduction of single crystal grains of waste salt |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2186433A (en) * | 1936-11-17 | 1940-01-09 | Firm Rutgerswerke Ag | Process for the recovery of aluminum and fluorine compounds from the worn-out linings of the electric furnaces employed for the production of aluminum |
| US5470559A (en) * | 1993-02-26 | 1995-11-28 | Alcan International Limited | Recycling of spent pot linings |
| DE4432299A1 (en) * | 1994-09-10 | 1996-03-14 | Metallgesellschaft Ag | Working up aluminium salt slag |
| RU2127850C1 (en) * | 1993-06-29 | 1999-03-20 | Алюминум Компани оф Америка | Method of treatment of worked-out lining of electrolytic fusion of aluminium, installation for its realization, device for processing of waste of reclamation of worked-out lining and injection system for loading of worked-out lining |
| RU2171853C2 (en) * | 1999-05-11 | 2001-08-10 | Акционерное общество открытого типа "Всероссийский алюминиево-магниевый институт" | Method for processing waste lining of aluminium cells |
| RU2199488C2 (en) * | 2000-11-30 | 2003-02-27 | Открытое акционерное общество "ВОЛГОГРАДСКИЙ АЛЮМИНИЙ" | Method for processing waste carbon lining of aluminum cells |
| US6596252B2 (en) * | 1999-12-17 | 2003-07-22 | Alcan International Limited | Recycling of spent pot linings |
-
2009
- 2009-05-04 RU RU2009117054A patent/RU2425179C2/en not_active Application Discontinuation
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2186433A (en) * | 1936-11-17 | 1940-01-09 | Firm Rutgerswerke Ag | Process for the recovery of aluminum and fluorine compounds from the worn-out linings of the electric furnaces employed for the production of aluminum |
| US5470559A (en) * | 1993-02-26 | 1995-11-28 | Alcan International Limited | Recycling of spent pot linings |
| RU2127850C1 (en) * | 1993-06-29 | 1999-03-20 | Алюминум Компани оф Америка | Method of treatment of worked-out lining of electrolytic fusion of aluminium, installation for its realization, device for processing of waste of reclamation of worked-out lining and injection system for loading of worked-out lining |
| DE4432299A1 (en) * | 1994-09-10 | 1996-03-14 | Metallgesellschaft Ag | Working up aluminium salt slag |
| RU2171853C2 (en) * | 1999-05-11 | 2001-08-10 | Акционерное общество открытого типа "Всероссийский алюминиево-магниевый институт" | Method for processing waste lining of aluminium cells |
| US6596252B2 (en) * | 1999-12-17 | 2003-07-22 | Alcan International Limited | Recycling of spent pot linings |
| RU2199488C2 (en) * | 2000-11-30 | 2003-02-27 | Открытое акционерное общество "ВОЛГОГРАДСКИЙ АЛЮМИНИЙ" | Method for processing waste carbon lining of aluminum cells |
Non-Patent Citations (1)
| Title |
|---|
| СУШКОВ А.И., ТРОИЦКИЙ И.А. Металлургия алюминия. - М.: Металлургия, 1965, с.421-424. * |
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