KR810002043B1 - Baltz method for volatilizing zinc and lead from iron oxide-containing materials - Google Patents
Baltz method for volatilizing zinc and lead from iron oxide-containing materials Download PDFInfo
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- KR810002043B1 KR810002043B1 KR7800311A KR780000311A KR810002043B1 KR 810002043 B1 KR810002043 B1 KR 810002043B1 KR 7800311 A KR7800311 A KR 7800311A KR 780000311 A KR780000311 A KR 780000311A KR 810002043 B1 KR810002043 B1 KR 810002043B1
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- 239000000463 material Substances 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 16
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 title claims description 9
- 239000011701 zinc Substances 0.000 title claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims description 5
- 229910052725 zinc Inorganic materials 0.000 title claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 23
- 239000008188 pellet Substances 0.000 claims description 19
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 2
- 229910001882 dioxygen Inorganic materials 0.000 claims description 2
- 238000005453 pelletization Methods 0.000 claims description 2
- 239000003039 volatile agent Substances 0.000 claims description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 235000013980 iron oxide Nutrition 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 238000010744 Boudouard reaction Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- -1 corresponding ores Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/04—Obtaining zinc by distilling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B13/00—Obtaining lead
- C22B13/02—Obtaining lead by dry processes
- C22B13/025—Recovery from waste materials
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
내용 없음.No content.
Description
본 발명은 경사(傾斜)회전로 내에서 산화철 함유 공급물질로 부터 아연 및 납을 휘발시키는 발쯔법(Waelz process)에 관한 것으로 발쯔법은 펠렛성형되고(pelletized) 적어도 일부가 건조된 공급물질을 고형탄소질 환원제와 함께 회전로 상단에 장입하고, 장입물의 연화점 이하의 온도에서 휘발 및 환원시킨 다음 금속성 철 함유물질을 회전로 하단으로 부터 배출시키고 배출된 물질의 일부를 분리시킨 다음 펠렛성형하기 전에 공급물질에 재순환 시키고 연소에 필요한 산소가스를 회전로 하단에 흡입시키고 휘발성분을 함유하는 배기가스를 회전로 상단으로 부터 배출시키는 것으로 이루어진다.The present invention relates to the Waelz process, which volatilizes zinc and lead from iron oxide-containing feedstock in an inclined rotary furnace, wherein the Baltz process is pelletized and at least partially dried feed solid. Charge with the carbonaceous reducing agent at the top of the rotary furnace, volatilize and reduce at a temperature below the softening point of the charge, discharge the metallic iron-containing material from the bottom of the rotary furnace, separate some of the discharged material and feed it before pelleting The material is recycled to the material, and the oxygen gas necessary for combustion is sucked to the bottom of the rotary furnace and exhaust gas containing volatiles is discharged from the top of the rotary furnace.
발쯔법은 휘발성 금속 또는 금속 화합물을 함유하는 원료물질을 처리하는데 사용된다. 이것은 특히 상응하는 광석, 중간체, 납 용광로 슬래그, 레토오트(retort)찌꺼기등과 같은 비교적 금속함량이 낮은 금속선구체로 부터 아연과 납을 제거하기 위해 환원 및 휘발 처리하는데 사용된다.The Baltz method is used to treat raw materials containing volatile metals or metal compounds. It is especially used for reduction and volatilization to remove zinc and lead from relatively low metal precursors, such as corresponding ores, intermediates, lead furnace slag, and retort residues.
반응기는 연속적으로 작동하는 경사회전로로 구성되어 있다. 환원제는 고체 탄소로 구성되며 이것은 장입물과 함께 공급된다. 연소에 필요한 공기는 배출이 끝난 다음 회전로내에 흡입시킨다. 배기가스는 장입 말단부를 통해 배출시킨다. 장입물 사이에서 상호반응이 수행되며 즉 산화아연이 일산화 탄소에 의해 환원되고,The reactor consists of inclined rotary furnaces operating continuously. The reducing agent consists of solid carbon which is supplied with the charge. The air necessary for combustion is sucked into the rotary furnace after the discharge. Exhaust gas is discharged through the charging end. The interaction between charges is carried out, ie zinc oxide is reduced by carbon monoxide,
ZnO+CO=Zn+CO2 ZnO + CO = Zn + CO 2
결과 생성된 이산화 탄소의 부두아르(Boudouard)반응에 의해 환원용 CO가 재형성된다.Reducing CO is reformed by the Boudouard reaction of the resulting carbon dioxide.
CO2+C=2COCO 2 + C = 2CO
아연과 더불어 생성된 일산화탄소의 일부는 그의 비점이상의 온도에서 이용 가능하며, 장입물 위의 회전로내 빈공간에 도입되어 거기서 연소한다. 생성된 산화 아연 미분은 배기가스로부터 수집된다.Some of the carbon monoxide produced along with zinc is available at temperatures above its boiling point, introduced into the empty space in the rotary furnace above the charge and burned there. The resulting zinc oxide fines are collected from the exhaust gas.
원료물질에 함유된 산화철도 또한 환원된다. 철은 주로 회전로로 부터 배출되는 물질내에 금속 상태로 있는 경우 이용 가능하다. 장입물이 회전로의 최종 대역에서 페이스트 상태로 가공되며 금속성철이 함께 괴(塊)를 형성하는 렌-발쯔(Renn-Waelz)법과는 반대로, 발쯔법에서 회전로로 부터 배출된 물질은 미세하게 분쇄된 상태의 금속철을 함유하며 이것은 배출된 물질이 충분히 높은 함량의 철을 함유하는 경우 불순한(crude)철 및 강을 생성하는데 이용될 수 있다.Iron oxides contained in the raw materials are also reduced. Iron is available primarily when it is in the metal state in the material exiting the rotary furnace. In contrast to the Lenn-Waelz method, where the charge is processed into a paste in the final zone of the rotary furnace and the metallic iron forms a mass, the material discharged from the rotary furnace in the Baltz method is finely It contains metal iron in the ground state, which can be used to produce crude iron and steel if the discharged material contains a sufficiently high content of iron.
근래 발쯔법은 광진이나 진흙같은 잔류생성물을 가공하는 점차 대규모화되고 있는 공정에서 사용되며 이것을 불순한 철과 강을 생성하기 위한 용광로 플랜트, 소결플랜트 및 제강과 압연 플랜트에서 이용 가능하다. 이 방법은 이들 물질을 제거할 필요성을 없애주며, 이들 금속성분을 상당히 가치있게 이용할 수 있게 해준다. 회전로로 부터 배출되며 금속성 철을 함유하는 고체 물질은 일반적으로 용광로로 장입되며 이 목적을 위해 입자크기는 약 6㎜를 초과해야 한다. 이런 이유로 회전로로 부터 배출된 물질이 브리켓화(briquetted)되지 않는한 이들 물질은 회전로에 장입시키기 전에 펠렛 성형해야 한다. 그들이 회전로를 통과할 때 이들 입자크기가 바라는 한계치 아래로 저하되지 않게끔 펠렛의 분해와 마모는 최소가 되어야 한다.Recently, the Baltz method is used in an increasingly large-scale process of processing residual products such as mineral dust and mud, which can be used in furnace plants, sintering plants and steel and rolling plants to produce impure iron and steel. This method eliminates the need to remove these materials and makes these metals extremely valuable. Solid materials exiting the rotary furnace and containing metallic iron are generally charged into the furnace and for this purpose the particle size should exceed about 6 mm. For this reason, unless the material discharged from the kiln is briquetted, these materials must be pellet-formed before charging into the kiln. As they pass through the kiln, the decomposition and wear of the pellets should be minimal to ensure that these particle sizes do not fall below the desired limits.
고온에서 그들의 강도를 증가시키기 위한 펠렛의 연소는 이 공정에 바람직하지 못한 비용을 가중시키는 것으로 나타났다(독일공개 2300889호 참조).Combustion of pellets to increase their strength at high temperatures has been shown to add undesirable costs to this process (see German Publication 2300889).
비교적 저온에서 펠렛을 예열하거나 건조시키는 것만이 과거에 제안되어 왔다. 이 결과 생긴 강도의 증가는 연소에 의한 것보다 작다.Only preheating or drying pellets at relatively low temperatures has been proposed in the past. The resulting increase in strength is less than that due to combustion.
회전로로부터 배출된 고형물질로 부터 작은 펠렛을 분리시키고 재순환된 산화철 미분으로서 분리된 펠렛을 펠렛성형되어야 할 혼합물에 첨가하는 것도 또한 알려져 있다. 펠렛은 약 121-427℃에서 건조시킨 다음 발쯔법에 의한 회전로내에 (독일공개 1508050호) 장입시킨다. 재순환된 작은 펠렛의 강도에 미치는 영향은 언급되어 있지 않으며 소망에 따라 재순환은 생략할 수 있다.It is also known to separate small pellets from the solids discharged from the rotary furnace and add the separated pellets as recycled iron oxide fines to the mixture to be pelletized. The pellets are dried at about 121-427 ° C. and then charged into a rotary furnace by the Balz method (Germany Publication No. 1508050). The effect on the strength of the recycled small pellets is not mentioned and the recycle can be omitted if desired.
본 발명의 목적은 발쯔법에서 사용될 수 있으며 회전로내에서 분해되고 마모되는 경향이 적고, 저렴한 비용으로 철야금분야에서 이용 가능한 찌꺼기 물질을 사용하여 만들수 있는 펠렛을 제조하는 것이다.It is an object of the present invention to produce pellets which can be used in the Baltz method and are less prone to decomposition and wear in rotary furnaces and can be made using residue materials available in the field of metallurgy at low cost.
본 목적은 금속철 함유 물질로부터 분리된 재순환용 물질을 약 1㎜ 이하의 크기로 분쇄한 다음 펠렛성형되기 전의 공급물질과 혼합하고 이 펠렛을 300℃이하의 온도에서 산소 함유 가스로 적어도 부분 건조시킨다. ＂장입물의 연화점 이하의 온도＂란 장입물 전체가 균일하게 연화되어 페이스트 또는 유동저항성을 가지는 액체로 되지 않고 단지 개개입자가 표면적으로 연화되어 함께 소결되는 온도를 말한다. 재순환된 물질에서의 금속화도는 80%이상이다. 발쯔법에서 요구되며 공급물질내 본래 함유되어 있지 않은 탄소는 분리하여 회전로내에 장입할 수 있으며 또는 이들 탄소의 일부 또는 전부를 펠렛내에 혼입시킬 수도 있다. 펠렛은 통상의 무기 또는 유기결합제를 첨가하여 만들 수 있다.The object is to pulverize the recirculating material separated from the iron-containing material to a size of about 1 mm or less and then mix it with the feed material before pelletizing and at least partially dry the pellet with an oxygen-containing gas at a temperature below 300 ° C. . “Temperature below the softening point of the charge” refers to the temperature at which the entire charge is softened uniformly and does not become a paste or liquid having a flow resistance, but only individual particles soften the surface area and sinter together. The degree of metallization in the recycled material is greater than 80%. Carbon required by the Baltz method and not originally contained in the feed may be separately loaded into the rotary furnace or some or all of these carbons may be incorporated into the pellets. Pellets can be made by adding conventional inorganic or organic binders.
펠렛은 완전히 건조시킬 필요는 없다. 미처리펠렛내 초기함유된 물의 약 30-50%를 축출시켜 금속성 철이나 가능한 다른 반응물질과 화학반응에 의해 결합시키면 충분하다. 예컨대, 초기 물의 함량이 12.2%인 경우 최종 물의 함량은 7.1%함유하도록 건조하면 충분하다. 물의 함량이 낮게 건조시키면 시킬수록, 펠렛의 강도는 한층 증가하나 증가율은 훨씬 더 낮아진다. 배출물로부터 분리되어 재순환되어야 할 물질은 요구되는 최소크기인 약 6㎜보다 더 작은 입자로 구성되는 것이 적당하다. 소형크기의 물질이 충분히 높은 비율로 얻어지지 않는 경우 배출된 보다 큰 물질을 요구된 양만큼 분리하여 더작은 크기로 분쇄한다. 과잉량의 환원제는 미리 분리한다.The pellets do not need to be dried completely. It is sufficient to expel about 30-50% of the initial content of water in the untreated pellets and bond them by chemical reaction with metallic iron or other possible reactants. For example, if the initial water content is 12.2%, it is sufficient to dry the content of the final water to 7.1%. The lower the water content, the greater the strength of the pellets, but the lower the rate of increase. The material to be separated and recycled from the effluent is suitably composed of particles smaller than the required minimum size of about 6 mm. If a small size of material is not obtained at a sufficiently high rate, the larger material discharged is separated by the required amount and ground to a smaller size. Excess reducing agent is separated in advance.
바람직하게는 재순환되는 물질을 0.5㎜이하로 분쇄한다. 이 입자 크기에서 특히 우수한 강도가 생긴다.Preferably the material to be recycled is ground to 0.5 mm or less. Particularly good strength occurs at this particle size.
펠렛을 실온으로 공기중에서 건조하면 바람직하다. 건조는 공기중에서 저장하거나 또는 가스 투과조절 장치 상에서 층의 형태로 저장하던가 또는 물질을 빈(bin)을 통과시켜서 수행한다. 이 경우 건조하기 위해 열량을 공급해 줄 필요는 없다.It is preferable to dry the pellets in air at room temperature. Drying is carried out by storage in air or in the form of layers on a gas permeation control device or by passing the material through a bin. In this case, it is not necessary to supply calories to dry.
바람직하게는 펠렛을 150-250℃의 온도에서 건조시킨다. 건조는 회전로로부터의 배기가스나 다른 연도(煙道)가스와 같은 산소-함유가온가스에 의해 수행될 수 있다. 이 온도에서 단시간 건조시키면 높은 강도가 얻어진다.Preferably the pellets are dried at a temperature of 150-250 ° C. Drying can be carried out by oxygen-containing warming gases such as exhaust gases from rotary furnaces or other flue gases. Short drying at this temperature yields high strength.
건조용으로 사용되는 공기 또는 산소함유가스 중의 수증기함량은 바라는 강도치 및 건조 조건에 따라 조절될 수 있다.The water vapor content in the air or oxygen-containing gas used for drying can be adjusted according to the desired strength value and drying conditions.
바람직하게는, 재순환되어야 할 물질을 혼합물의 2-25% 바람직하게는 5-15%가 되도록 공급물질과 혼합한다. 이 비율로 하면 회전로의 처리량 및 강도치가 높아진다.Preferably, the material to be recycled is mixed with the feed to be 2-25%, preferably 5-15%, of the mixture. This ratio increases the throughput and strength value of the rotary furnace.
본 발명의 주이점은 발쯔법에서 사용될 수 있으며, 회전로로부터 배출되는 고체물질의 대부분이 용광로에 직접 사용될 수 있도록 회전로내에서 분해되고 마모되는 경향이 적은 펠렛을 비교적 저렴한 가격으로 생산할 수 있는데 있다.The main advantage of the present invention can be used in the Baltz method, it is possible to produce pellets with a low tendency to decompose and wear in the rotary furnace so that most of the solid material discharged from the rotary furnace can be used directly in the furnace. .
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR7800311A KR810002043B1 (en) | 1978-02-07 | 1978-02-07 | Baltz method for volatilizing zinc and lead from iron oxide-containing materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR7800311A KR810002043B1 (en) | 1978-02-07 | 1978-02-07 | Baltz method for volatilizing zinc and lead from iron oxide-containing materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR810002043B1 true KR810002043B1 (en) | 1981-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR7800311A Expired KR810002043B1 (en) | 1978-02-07 | 1978-02-07 | Baltz method for volatilizing zinc and lead from iron oxide-containing materials |
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| Country | Link |
|---|---|
| KR (1) | KR810002043B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2802932C1 (en) * | 2023-02-06 | 2023-09-05 | Негосударственное частное образовательное учреждение высшего образования "Технический университет УГМК" | Method for processing oxidized zinc-lead-containing raw materials |
-
1978
- 1978-02-07 KR KR7800311A patent/KR810002043B1/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2802932C1 (en) * | 2023-02-06 | 2023-09-05 | Негосударственное частное образовательное учреждение высшего образования "Технический университет УГМК" | Method for processing oxidized zinc-lead-containing raw materials |
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