CN105734301A - Lead smelting method - Google Patents

Lead smelting method Download PDF

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Publication number
CN105734301A
CN105734301A CN201610140465.6A CN201610140465A CN105734301A CN 105734301 A CN105734301 A CN 105734301A CN 201610140465 A CN201610140465 A CN 201610140465A CN 105734301 A CN105734301 A CN 105734301A
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CN
China
Prior art keywords
zinc
slag
vulcanizing agent
vulcanizing
lead
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610140465.6A
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Chinese (zh)
Inventor
马瑞新
李士娜
黄凯
李祥
张小勇
杨帆
赵卫双
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University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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Publication date
Application filed by University of Science and Technology Beijing USTB filed Critical University of Science and Technology Beijing USTB
Priority to CN201610140465.6A priority Critical patent/CN105734301A/en
Publication of CN105734301A publication Critical patent/CN105734301A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • C22B7/04—Working-up slag
    • 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
    • C22B19/20—Obtaining zinc otherwise than by distilling
    • 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
    • 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
    • C22B7/001—Dry processes
    • C22B7/002—Dry processes by treating with halogens, sulfur or compounds thereof; by carburising, by treating with hydrogen (hydriding)
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention relates to a lead smelting method, and belongs to the field of nonferrous metallurgy. The method comprises the specific steps that a vulcanizing agent is added in liquid slag, discharged out of a reduction furnace, with the temperature ranging from 1,000 DEG C to 1,300 DEG C, the vulcanizing agent is SO2 gas or iron pyrite or other organic or inorganic compounds containing sulfur or the combination of the above vulcanizing agent, and the adding amount of the vulcanizing agent is 100%-200% of the theoretical calculating amount; and the vulcanizing process is conducted in an insulating furnace or a chute. According to a vulcanizing result, zinc in the slag is vulcanized into zinc sulfide, zinc matte can be formed through the formed zinc sulfide and the added excessive FeS, and an independent zinc sulfide phase can be formed under the condition that the vulcanizing agent is not excessive. After the slag cooled to the room temperature and treated through vulcanizing is finely ground into the granularity ranging from -200 meshes to -100 meshes, the conventional flotation technology is conducted, and zinc is recycled in the form of ZnS. The technology is very low in energy consumption, equipment is simple, the zinc recycling rate is high, and waste slag utilization is flexible and convenient. Meanwhile, precious metal can be captured from the zinc matte or the zinc sulfide through the method.

Description

A kind of lead smelting process
Invention field:
The present invention is the lead-zinc smelting enterprise in Non-ferrous Metallurgy field, especially heavy non-ferrous metal.
Technical background
The raising day by day required due to increasingly stringent and the energy-saving and emission-reduction of environmental regulation, traditional sintering+air blast The method processing Pb-Zn deposits of stove melting has been put into the production technology that time limit is eliminated.New refining splicer's skill is met the tendency And give birth to.Lead-smelting method currently mainly includes: Kivcet (base husband's Saite) method, QSL method, Ausmelt method, ISA method, Kaldo method, SKS method (oxygen bottom-blowing+blast furnace reduction), three combination oven method (oxygen bottom blowings Melting+side-blown reduction+fuming furnace) etc..
Kivcet method is to work continuously, and aoxidizes and reduces and completes in a stove, and production link is few, flue gas SO2 Concentration is high, and dust rate is low, and flue dust is smelted in directly returning stove.But its processing disadvantages is the most obvious: granularity is wanted Asking and control at below 0.5mm, aqueous be less than 1%, and equipment is complicated, one-time investment is higher.
QSL method use oxygen bottom-blowing, the end dust coal reduction.Oxidation and reduction are at same stove interior Zones of different realizes, and technological operation difficulty is big, and reduction section technology condition is complicated, and the reduction degree of depth is the most easily-controllable System, the lead layer bottom molten bath is directly exposed under the impact agitation of gun slot high-temperature combustion gas, inevitably The volatilization loss of lead will be increased.QSL method production cycle is long, and dust rate and lead-in-dreg are high, and slag needs further Dilution processes.
Ausmelt method is top blast immersion smelting technology, and this technological process is short, device structure is simple, raw material is suitable Ying Xingqiang, flue gas SO2Concentration is high.But subject matter has: smelting furnace operating rate is relatively low, melting dust rate is higher, Service life of lance is short, can not realize complete self-heating, needs coal blending in feed stock for blast furnace.
Kaldo method be by charging, aoxidize, reduce, slagging/put four steps of lead completes in a stove, week The operation of phase property.Reduction period SO2Flue gas is little, it has at the absorption heat of oxidation, a part of SO of compression condensation2 For liquid, add to after reduction period regasifies in flue gas to maintain the continuous operation of flue gas acid preparing system, operation Trouble.Being interrupted operation, the stove longevity is short, complexity of getting the raw materials ready, and entering furnace charge needs depth drying, SO in flue gas2Off and on, Antacid is complicated.
SKS method (Shuikoushan method) is oxygen bottom-blowing+blast furnace reduction lead smelting process.It it is China's grace phenanthrene engineering The new work of refining lead with the leading level in the world that Technology Co., Ltd. develops jointly with Shuikoushan nonferrous metals companies Skill, but the high lead slag that its oxygen bottom blown furnace is out send retailoring of blast furnace after needing to cool down ingot casting, and energy consumption is relative Higher, and increase cost.
CN102634674A proposes a kind of oxygen bottom-blowing liquid high lead dross side-blown direct-reduction work Skill.
Three combination oven methods are the refining lead new technologies of Henan Wan Yang company independent research, and this technique uses oxidation furnace reduction Stove fuming furnace three stove is connected, warm sludge direct current, and three bath smelting furnaces are connected chute by twice and are serially connected group Integral；Make full use of the latent heat of liquid high lead dross and reduced blast furnace.
No matter which kind of lead-smelting method, its core process is all to first pass through oxidizing process using the sulfide oxygen as raw material Chemical conversion lead oxide enters slag, is then passed through reduction process and the lead oxide in slag (lead-rich slag) is reduced into metallic lead. In above process, a kind of form presenting zinc oxide of the zinc element of association, the residues containing zinc finally obtained carries out cigarette Change process, i.e. uses higher reduction temperature, makes zinc oxide reduction become metallic zinc, enters gas phase, inhales at fuming furnace Different grades of secondary zinc oxide product is become under the secondary that enters, the Oxidation of tertiary air.
In the smelting process of lead, the temperature of fuming process is the highest, reaches 1250 DEG C～about 1300 DEG C, and energy consumption account for About about the 50% of whole lead smelting process.Therefore fuming process is the important barrier that lead smelts that energy consumption reduces further Hinder.
Summary of the invention:
The present invention is directed to the high fuming process of energy consumption during lead is smelted propose a kind of to replace fuming process with sulfuration method New technology.New technology is by the oxidizing process of lead-zinc sulfide ore, the reduction process of lead-rich slag and the sulfuration of reducing slag Cheng Zucheng.Compared with traditional handicraft, sulfuration engineering energy consumption the lowest (quasi-self-heating is carried out), equipment are simple, zinc The response rate is high, and the utilization of waste is flexible.
A kind of lead smelting process, concretely comprises the following steps:
Vulcanizing agent, vulcanizing agent is added in the liquid slag that the temperature released from reduction furnace is 1000 DEG C～1300 DEG C Can be the organic of SO2 gas, pyrite or other sulfur-bearings or inorganic compound, it is also possible to be above-mentioned The combination of vulcanizing agent, the wherein best results of SO2 gas+pyrite composite vulcanizing agent.Through vulcanizing treatment with After slag, the response rate of zinc can be up to 99.8%.
The addition of described vulcanizing agent is with the 100%～200% of theoretical amount.Sulfidation can be at holding furnace Inside carry out, it is also possible to carry out in chute.
Through peroxidating, reduce after leaded 2%, containing zinc 5～10%, SiO2 of being generally less than of reducing slag: 18～22, Fe:30～35%, CaO:16～20% and a small amount of Al2O3.Through the reducing slag of over cure, Enter in cinder ladle and carry out slow cooling, it is also possible to carry out shrend chilling according to conventional treatment mode.
Be cooled to room temperature and reducing slag after vulcanizing agent processes, through being milled down to-100 mesh～-200 After mesh, carry out conventional flotation technique, zinc is reclaimed with the form of ZnS.
The noble metal contained in slag, can also be reclaimed by zinc matte or zinc sulfide paved set such as Ag etc..
The present invention vulcanizes engineering energy consumption the lowest (quasi-self-heating is carried out), equipment simply, and the response rate of zinc is high, waste Utilization flexible.
Detailed description of the invention
Example 1:
Consisting of 2%Pb by 1000 grams, the reduced blast furnace of 10%Zn, 20%SiO2,30%Fe, 18%Ca is heated to 1000 DEG C, it is added thereto to 15 grams of FeS2, stirs, then furnace cooling.Milled 200 mesh sieves, Do flotation agent with xanthate, obtain ZnS+FeS and amount to 180 grams, wherein containing 98.5 grams of zinc.The response rate of zinc is 98.5%.
Example 2:
Consisting of 2%Pb by 1000 grams, the reduced blast furnace of 10%Zn, 20%SiO2,30%Fe, 18%Ca is heated to 1250 DEG C, it is added thereto to 18 grams of FeS2, stirs, then furnace cooling.Obtain solid zinc matte (ZnS+FeS) 170 grams are amounted to, wherein containing 96 grams of zinc.The response rate of zinc is 97%.
Example 3:
Consisting of 2%Pb by 1000 grams, the reduced blast furnace of 10%Zn, 20%SiO2,30%Fe, 18%Ca is heated to 1250 DEG C, it is added thereto to 18 grams of FeS2, stirs, then furnace cooling.Obtain zinc matte (ZnS+FeS) Solid amounts to 170 grams, and slag is ground into-200 mesh, does flotation agent with xanthate, and flotation obtains zinc matte 18 grams. Both obtain 99 grams of zinc at total.The response rate of zinc is 99%.
Example 4:
Consisting of 2%Pb by 1000 grams, the reduced blast furnace of 10%Zn, 20%SiO2,30%Fe, 18%Ca is heated to 1250 DEG C, being added thereto to 18 grams of FeS2, nitrogen buffer gas brings SO2 gas into simultaneously, and duration of ventilation is 15 minutes, furnace cooling after standing 30 minutes.Obtain zinc matte (ZnS+FeS) solid 180 grams, then Slag is ground into-200 mesh sieves, and with xanthate as flotation agent, flotation obtains zinc matte 6 grams.Both obtain zinc at total 99.8 grams.The response rate of zinc is 99.8%.

Claims (5)

1. a lead smelting process, it is characterised in that concrete smelting step is:
Vulcanizing agent, vulcanizing agent is added in the liquid slag that the temperature released from reduction furnace is 1000 DEG C～1300 DEG C For SO2Organic or the inorganic compound of gas, pyrite or other sulfur-bearings, or above-mentioned vulcanizing agent Combination, the addition of described vulcanizing agent is with the 100%～200% of theoretical amount, and basis makes liquid exactly Zinc in lead skim is completely converted into the sulfuration dosage required for zinc sulfide；Sulfidation is carried out in holding furnace, or Person is carried out in chute.
2. a kind of lead smelting process, it is characterised in that vulcanizing agent is SO2Gas+Huang Iron mine, the slag after vulcanizing treatment, the response rate of zinc can be up to 99.8%.
3. a kind of lead-zinc smelting method, it is characterised in that after over cure Reducing slag is after settlement separate, and zinc forms zinc matte and slag natural separation, gained slag in the way of zinc sulfide Being waste, waste enters in cinder ladle and carries out slow cooling or carry out shrend chilling according to conventional treatment mode.
4. a kind of lead smelting process as described in claim 1,2 or 3, it is characterised in that through vulcanizing treatment And through the slag of slow cooling, after being milled down to-100 mesh～-200 mesh, carry out conventional flotation technique, by zinc with The form of ZnS reclaims.
5. a kind of lead smelting process as described in claim 1,2 or 3, it is characterised in that your gold contained in slag Genus can be reclaimed by zinc matte or zinc sulfide paved set.
CN201610140465.6A 2016-03-11 2016-03-11 Lead smelting method Pending CN105734301A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610140465.6A CN105734301A (en) 2016-03-11 2016-03-11 Lead smelting method

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Application Number Priority Date Filing Date Title
CN201610140465.6A CN105734301A (en) 2016-03-11 2016-03-11 Lead smelting method

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108251677A (en) * 2018-01-24 2018-07-06 株洲创林合金有限责任公司 A kind of metal smelting deslagging agent and preparation method thereof
CN110983029A (en) * 2019-11-18 2020-04-10 中南大学 Method for carrying out synergistic vulcanization roasting on lead-zinc smelting slag and gypsum slag
CN114058868A (en) * 2021-11-19 2022-02-18 安徽超威环保科技有限公司 Transfer furnace device for secondary lead smelting reduction lead refining

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101492773A (en) * 2009-03-13 2009-07-29 内黄县鑫虹化工厂 Process and system for recycling lead-zinc furnace cinder
CN102011011A (en) * 2010-09-19 2011-04-13 南京工业大学 Recycling and treating method for low-lead-zinc-content waste residues
CN102102152A (en) * 2009-12-17 2011-06-22 云南冶金集团股份有限公司 Method for smelting lead by reducing lead-rich slags

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101492773A (en) * 2009-03-13 2009-07-29 内黄县鑫虹化工厂 Process and system for recycling lead-zinc furnace cinder
CN102102152A (en) * 2009-12-17 2011-06-22 云南冶金集团股份有限公司 Method for smelting lead by reducing lead-rich slags
CN102011011A (en) * 2010-09-19 2011-04-13 南京工业大学 Recycling and treating method for low-lead-zinc-content waste residues

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
刘维等: ""铅锌冶炼渣选冶联合处理技术研究进展"", 《中国有色金属专家网》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108251677A (en) * 2018-01-24 2018-07-06 株洲创林合金有限责任公司 A kind of metal smelting deslagging agent and preparation method thereof
CN110983029A (en) * 2019-11-18 2020-04-10 中南大学 Method for carrying out synergistic vulcanization roasting on lead-zinc smelting slag and gypsum slag
CN114058868A (en) * 2021-11-19 2022-02-18 安徽超威环保科技有限公司 Transfer furnace device for secondary lead smelting reduction lead refining
CN114058868B (en) * 2021-11-19 2023-02-28 安徽超威环保科技有限公司 Transfer furnace device for secondary lead smelting reduction lead refining

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Application publication date: 20160706