CN103382527B - Flash smelting method and device for zinc sulfide concentrates and materials containing lead and zinc - Google Patents

Flash smelting method and device for zinc sulfide concentrates and materials containing lead and zinc Download PDF

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Publication number
CN103382527B
CN103382527B CN201310310891.6A CN201310310891A CN103382527B CN 103382527 B CN103382527 B CN 103382527B CN 201310310891 A CN201310310891 A CN 201310310891A CN 103382527 B CN103382527 B CN 103382527B
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zinc
lead
reaction tower
smelting
reduction
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CN201310310891.6A
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CN103382527A (en
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唐朝波
陈永明
唐谟堂
刘志宏
杨声海
何静
杨建广
叶龙刚
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中南大学
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Abstract

The invention discloses a flash smelting method and a device for zinc sulfide concentrates and materials containing lead and zinc. The flash smelting method for the zinc sulfide concentrates and the materials containing the lead and the zinc comprises mixing the dry powder materials containing lead and zinc in proportion and spraying the mixed materials and oxygen into a smelting device from the top of a reaction tower; the smelting device is formed by three portions namely a reaction tower area, a reducing area and a clarification area which are provided with communicated bottoms; materials containing zinc achieve a oxidation sweetening reaction in the air above the reaction tower to generate into high zinc slag melt with an appropriate melting point of minus 1200 DEG C and fall into the reaction tower area; the liquid form high zinc slag melt enters into the reducing area; zinc in the high zinc slag melt is performed reduction to generate zinc steam to be collected; lead is performed reduction to be metallic lead; precious metal such as golden, silver and the like of raw materials are gathered to be precipitated at the bottom of a melt pond and discharged through a lead discharging opening. Slags which are performed reduction are discharged through a slag discharging opening, fuming processing is abandoned or further performed according to the content of the lead and the zinc. The flash smelting method and the device for the zinc sulfide concentrates and the materials containing the lead and the zinc have the advantages of being short in process, strong in material adaptability, low in energy consumption, environmentally friendly, high in resource utilization efficiency, significant for technology progress of a lead and zinc smelting industry and the like.

Description

Zinc sulfide concentrates and containing flash smelting method and the equipment of smelting charge of lead and zinc
Technical field
The present invention relates to a kind of zinc sulfide concentrates and containing flash smelting method and the equipment of smelting charge of lead and zinc, belong to non-ferrous metal metallurgy technical field.
Background technology
China is zinc producing country the biggest in the world, within 2012, metallic zinc output is 5,130,000 tons, wherein the overwhelming majority adopts traditional wet processing (roasting-leaching-electrolysis), also has small part to adopt thermal process (closed blast furnace zinc metallurgy, zinc vertical retorting, electric furnace zinc smelting).Except the shortcoming such as have that technical process is long, investment is large, production cost is high and comprehensive recovery is poor, also there are following serious problems in zinc hydrometallurgy traditional technology: 1) iron vitriol slag enormous amount, cannot process, and store up for a long time contaminate environment; Leached mud still needs pyrogenic attack, and energy consumption is large, and environment is severe; 2) processing high-iron zinc sulfide concentrate, zinc oxide ore and secondary zinc resource difficulty are large, and benefit is very poor; 3) in roasting process, the combustion heat of zinc sulphide is not that smelting itself is used, zinc hydrometallurgy energy consumption very high (direct current consumption >=3000kwh/t).For shortening flow process and adapting to the processing of high-iron zinc sulfide concentrate, the recently domestic oxygen pressure extract technology that also developed, still have that investment is large, the problem such as maintenance of the equipment trouble and production cost height, particularly leached mud individual curing is difficult, must include pyrometallurgical smelting of lead process in and process, and the problem of iron vitriol slag still exists.Zinc vertical retorting in thermal process and electric furnace zinc smelting, because energy consumption is high, cost is large and production efficiency is low, are all classified as by country the backward technique that explicit order is eliminated.There is the sintering circuit falling behind in closed blast furnace zinc metallurgy, and in reduction process, consumes a large amount of coke, and economic and technical norms are compared and do not had clear superiority with wet processing, and particularly environmental pollution is serious.
Flash smelting has obtained successful Application in copper smelting and plumbous smelting, there is the advantages such as flow process is short, cost is low, index is good, its sharpest edges are: adopt oxygen enrichment operation, increased substantially production efficiency, the oxidation reaction heat that takes full advantage of sulphide ores, energy consumption significantly reduces, and concentrate of lead sulfide ore base husband Saite melting technology is produced one ton of lead bullion, energy consumption is no more than 300kg mark coal, and priming cost is lower than 1000 yuan/ton of lead bullions.In contrast to this, zinc hydrometallurgy production cost surpasses 4000 yuan/ton of zinc.Therefore, develop flash smelting technique a kind of and the lead ore concentrate base husband similar zinc ore concentrate of Saite melting technology and material containing zinc, energy-saving and cost-reducing, the resource high-efficiency for zinc, smelted reclaim and solve the problems such as waste residue environmental pollution, significant.
But different from concentrate of lead sulfide ore flash smelting is, oxidation occurs concentrate of lead sulfide ore in reaction tower and cross reaction can obtain fusing point suitable (1100 ℃) and be applicable to the various operations of flash smelting and the high lead slag of requirement, and pure zinc sulfide concentrates its product after desulphurization reaction contains, zinc is high, fusing point is high (Zn-60%), be difficult to from the reaction tower district automatic flowing of settling tank to reduction zone the report of therefore studying and applying there are no zinc sulfide concentrates flash smelting at present.
Summary of the invention
Technical process that object of the present invention exists for existing smelting process is long, waste water and residue contamination is serious, production cost high (electrolytic power consumption >=3000kwh), comprehensively reclaim the serious problems such as poor, overcomes deficiency of prior art and is to provide a kind of zinc sulfide concentrates and contains flash smelting method and the equipment of smelting charge of lead and zinc; Realize that continuous high-efficient is smelted zinc sulfide concentrates and other are various containing smelting charge of lead and zincs, there is environment-protecting clean, energy consumption is low, production efficiency is high, comprehensive recovery is good.
A kind of zinc sulfide concentrates of the present invention and containing the flash smelting method of smelting charge of lead and zinc, comprises the steps:
The first step: batching
The leaded zinc pulverulent material of preparation mean particle size≤0.045mm, calculates by percentage to the quality, and leaded zinc powder shape material component comprises Zn15-35%, plumbous 5-30%, Fe5-30%, S10-30%, SiO 25-30%, CaO0.5-10%, H 2o≤0.3%, each constituent mass percent and be 100%;
Second step: oxidation sweetening
What by reinforced spray gun, the first step is obtained sprays into from reaction tower top containing smelting charge of lead and zinc and oxygen, containing smelting charge of lead and zinc, at reaction tower, complete oxidation desulfur reaction in the air, the high-concentration desulfurized flue gas of generation send relieving haperacidity operation through perpendicular liter after flue to waste heat boiler is lowered the temperature, gathered dust; The high cadmia melt producing descends slowly and lightly to the reaction tower district of reaction tower below;
The technology condition in reaction tower district is:
Reaction tower district temperature: 1050 ℃-1300 ℃,
Amount of oxygen is for being oxidized to SO by the sulphur containing in smelting charge of lead and zinc 2the 60-150% of required oxygen theoretical amount; The pressure of oxygen is 1-10 normal atmosphere, and oxygen content is 21-100%;
The 3rd step: reduction
The high cadmia of liquid state in reaction tower district flows to reduction zone by the passage of partition wall below, in reduction zone, by two side nozzles, spray into reductive agent, flux and oxygen enrichment oxygen, the zinc in high cadmia melt is reduced generation zinc fume and collects by the lead-splash condenser in reduction flue gas processing device through zinc fume flue; Lead in high cadmia melt is reduced into metallic lead and traps the precious metal in high cadmia melt, passage by partition wall below flows to settling section, be deposited in bottom, settling section, by lead bullion escape orifice, emit, slag after reduction is emitted by slag escape orifice, depending on content of Pb&Zn, discards or further fuming process;
Reduction zone technology condition is:
Reduction zone temperature: 1050 ℃-1300 ℃,
Reductive agent is fine coal or Sweet natural gas, the 100-300% of the theoretical amount that consumption is is zinc by the zine ion Restore All in high cadmia melt;
Flux is selected from Silicon-rich, rich calcium mineral, at least one in lime, high calcium zinc ore, high willemite;
Amount of oxygen is the 50-200% that maintains the theoretical amount of oxygen of molten bath reduction institute heat requirement; The pressure of oxygen is 1-10 normal atmosphere, and oxygen content (volume content) is 21-100%.
Zinc sulfide concentrates and containing the application of the flash smelting device of smelting charge of lead and zinc, is describedly selected from least one and the mixture of zinc sulfide concentrates composition in pyrite, zinc oxide ore, ore of zinc silicate, Steel Plant's zinc smoke, utilising zinc containing waste residue, concentrate of lead sulfide ore, lead-acid accumulator clay, lead containing sludge containing smelting charge of lead and zinc.
Zinc sulfide concentrates and containing the application of the flash smelting device of smelting charge of lead and zinc, the mass percent of the high cadmia melt main component in reaction tower district is Zn15-35%, plumbous 5-30%, Fe5-30%, S10-30%, SiO 25-30%, CaO0.5-10%, S≤1%; Mass percent containing Zn, Pb in the slag of settling section is Zn2-8%, Pb0.5-2%; And CaO/SiO in slag 2mass ratio be 0.4-1.2, FeO/SiO 2mass ratio be 1.0-3.0.
Zinc sulfide concentrates and containing the flash smelting equipment of smelting charge of lead and zinc, comprises smelting furnace body, the coffin that described smelting furnace body bottom is built into for refractory materials, and bottom area is 20-120m 2, described coffin is provided with 2 fan partition walls, and smelting furnace body bottom is divided into three regions that bottom is interconnected, and is respectively reaction tower district, reduction zone, settling section; In reaction tower district, along the vertical direction of body of heater bottom surface, be provided with successively perpendicular rise flue, reaction tower; In reduction zone, along the vertical direction of body of heater bottom surface, be provided with zinc fume flue, on the body of wall of body of heater both sides, be respectively arranged with the nozzle that extends to body of heater inner chamber; In settling section, be provided with lead bullion escape orifice and slag escape orifice, and slag escape orifice in the position of vertical direction than the height of lead bullion escape orifice.
A kind of zinc sulfide concentrates of the present invention and containing the flash smelting equipment of smelting charge of lead and zinc, described reaction tower is the cylinder shape space that copper water jacket forms, and 1-4 reinforced spray gun arranged at top, and bottom is communicated with smelting furnace body bottom rectangle space.
A kind of zinc sulfide concentrates of the present invention and containing the flash smelting equipment of smelting charge of lead and zinc, described reaction tower diameter is 2-6 rice, is highly 2-10 rice.
A kind of zinc sulfide concentrates of the present invention and containing the flash smelting equipment of smelting charge of lead and zinc, partition wall is made by the outer lining refractories of copper water jacket, and the distance of partition wall bottom surface and body of heater bottom surface is 0.5-3 rice.
A kind of zinc sulfide concentrates of the present invention and containing the flash smelting equipment of smelting charge of lead and zinc, described zinc fume flue is connected with peripheral hardware reduction flue gas processing device, and the flue gas processing device that reduces comprises lead-splash condenser.
A kind of zinc sulfide concentrates of the present invention and containing the flash smelting equipment of smelting charge of lead and zinc, described nozzle quantity is 1-20, the cross-sectional area of each nozzle is 5-100cm 2, the angle α between nozzle axis and horizontal plane is-30.≤α≤30。; Above the slag line of molten bath, reduction zone, be provided with the coffin that copper water jacket surrounds, it is highly 1-6 rice, and described coffin is connected with zinc fume flue.
Technological process principle of the present invention sketch under:
First, FeS in compound 2decompose:
FeS 2=FeS+S
Then ZnS, FeS, S and PbS are oxidized to metal oxide and SO in oxidized still 2:
2ZnS+3O 2=2ZnO+2SO 2
2FeS+3O 2=2FeO+2SO 2
S+O 2=SO 2
2PbS+3O 2=2PbO+2SO 2
In the molten bath of 1050-1350 ℃, the compositions such as ZnO, the FeO that oxidation generates and PbO act on each other and being dissolved in molten bath, the leaded high cadmia melt of high ferro newly increasing flows to molten pool reducing furnace automatically by chute, in molten pool reducing furnace, oxygen reacts and emits a large amount of heat with most of reductive agent, to maintain the thermal equilibrium of retailoring process:
C+O 2=CO 2↑+Q1
2C+O 2=2CO↑+Q 2
Under strong reducing property atmosphere, plumbous in leaded high cadmia, zinc oxide is reduced into respectively liquid lead and zinc fume, and absorbs large calorimetric:
PbO+C=Pb+CO↑-Q3
PbO+CO=Pb+CO 2↑-Q4
ZnO+C=Zn↑+CO↑-Q 5
ZnO+CO=Zn↑+CO 2↑-Q 6
Applicant according to slag phasor and lead-zinc production practice find: when slag containing zinc 35% when following, Pb, FeO, SiO 2, CaO equal size is when meet certain requirements, the fusing point of leaded high cadmia is below 1200 ℃, its every slag character can meet the requirement of oxygen enriched molten bath melting.
The present invention is owing to adopting aforesaid device and processing method, specialized designs is suitable for the oxygen enrichment flash smelting furnace of zinc sulfide concentrates and material containing zinc melting, by controlling the ratio of zinc sulfide concentrates and various material containing zincs, the high cadmia obtaining after oxidation sweetening is descended slowly and lightly in molten bath, now, high cadmia contains zinc below 35%, fusing point≤1200 ℃, and the every character of slag can meet the requirement of oxygen enrichment flash smelting.Liquid high cadmia is by the passage of partition wall below, automatically flow into reduction zone, and in reduction zone and the reductive agent generation reduction reaction that blasts: by controlling the ratio of reductive agent and oxygen, maintaining molten bath is strong reducing property atmosphere and satisfied reduction institute's heat requirement and temperature requirement, by oxygen enrichment, reduce and obtain metallic zinc and lead, copper in raw material reclaims in the mode of lead matte, and the precious metals such as gold and silver trap recovery by lead, for zinc sulfide concentrates and containing smelting charge of lead and zinc, provides a kind of new flash smelting mode.Therefore the present invention and traditional smelting process relatively have following remarkable advantage:
1). the combustion heat of the sulfide making full use of, energy consumption is at least saved more than 50% compared with conventional wet zinc metallurgy and closed blast furnace zinc metallurgy;
2). can realize oxygen enrichment operation, production efficiency increases substantially;
3). no longer produce zinc hydrometallurgy waste residue, can thoroughly solve its chronic pollution problem to environment;
4). the high-efficiency cleaning that can satisfactorily resolve high-iron zinc sulfide concentrate, zinc oxide ore and secondary zinc resource is processed problem;
5). can process auriferous pyrite, guarantee under the prerequisite of sulphur relieving haperacidity, reclaim in passing gold and make full use of its combustion heat and increase iron and carry the zinc content in leaded high cadmia. and eliminate the pollution of pyrite cinder;
6). comprehensively reclaim, the valuable elements such as gold and silver, copper, indium can obtain efficient recovery;
7). widened the raw material sources of smelting process, can arrange in pairs or groups process a part difficult, containing the high low value of low, the fluorine-containing chlorine of zinc containing smelting charge of lead and zinc.
Accompanying drawing explanation
Accompanying drawing 1 is the flash smelting device structure schematic diagram of the present invention containing smelting charge of lead and zinc
In accompanying drawing: 1-is perpendicular rises flue, 2-reaction tower, 3-molten bath, the 4-spray gun that feeds in raw material, 5-lead bullion escape orifice, 6-slag escape orifice, 7-partition wall, 8-zinc fume flue, 9-nozzle.
Embodiment
Embodiment 1
Referring to accompanying drawing 1, a kind of zinc sulfide concentrates of the present invention and containing the flash smelting equipment of smelting charge of lead and zinc, comprises smelting furnace body, the coffin 3 that described smelting furnace body bottom is built into for refractory materials, and bottom area is 20-120m 2, described coffin 3 is provided with 2 fan partition walls 7, and coffin 3 is divided into three regions that bottom is interconnected, and is respectively reaction tower district, reduction zone, settling section; In reaction tower district, along the vertical direction of body of heater bottom surface, be provided with successively perpendicular rise flue 1, reaction tower 2; In reduction zone, along the vertical direction of body of heater bottom surface, be provided with zinc fume flue 8, on the body of wall of body of heater both sides, be respectively arranged with the nozzle 9 that extends to body of heater inner chamber; In settling section, be provided with lead bullion escape orifice 5 and slag escape orifice 6, and slag escape orifice 6 in the position of vertical direction than the height of lead bullion escape orifice 5;
In the present embodiment, the cylinder shape space that reaction tower 2 forms for copper water jacket, 1-4 reinforced spray gun 4 arranged at top, and bottom is communicated with molten bath.
In the present embodiment, described reaction tower 2 diameters are 2-6 rice, are highly 2-8 rice.
In the present embodiment, partition wall 7 is made by the outer lining refractories of copper water jacket.
In the present embodiment, described zinc fume flue 8 is connected with peripheral hardware lead-splash condenser.
In the present embodiment, described nozzle 9 quantity are 1-20, and the cross-sectional area of each nozzle 9 is 5-100cm 2, the angle α between nozzle 9 axis and horizontal plane is-30 °≤α≤30 °.
In the present embodiment, above the slag line of molten bath, reduction zone, be provided with the coffin that copper water jacket surrounds, it is highly 1-6 rice, and described coffin is connected with zinc fume flue.
Embodiment 2
Zinc sulfide concentrates and containing the flash smelting melting method of smelting charge of lead and zinc, comprises the steps:
The first step: batching
Preparation mean particle size≤0.045mm, calculates by percentage to the quality, and composition comprises Zn26.73%, plumbous 18.44%, Fe14.23%, S19.15%, SiO 28.42%, CaO2.67%, H 2o≤0.3%, each constituent mass percent and be 100% leaded zinc pulverulent material;
Second step: oxidation sweetening
What by reinforced spray gun, the first step is obtained sprays into from reaction tower top containing smelting charge of lead and zinc and oxygen, containing smelting charge of lead and zinc, at reaction tower, complete oxidation desulfur reaction in the air, the high-concentration desulfurized flue gas of generation send relieving haperacidity operation through perpendicular liter after flue to waste heat boiler is lowered the temperature, gathered dust; The high cadmia melt producing descends slowly and lightly to the reaction tower district of reaction tower below;
The technology condition in reaction tower district is:
Reaction tower district temperature: 1050 ℃-1300 ℃,
Oxygen pressure is 5 normal atmosphere, and oxygen volume content is 100%.
The 3rd step: reduction
The high cadmia of liquid state in reaction tower district flows to reduction zone by the passage of partition wall below, in reduction zone, by two side nozzles, spray into reductive agent, flux and oxygen-rich air, the zinc in high cadmia melt is reduced generation zinc fume and collects by the lead-splash condenser in reduction flue gas processing device through zinc fume flue; Lead in high cadmia melt is reduced into metallic lead and traps the precious metal in high cadmia melt, passage by partition wall below flows to settling section, be deposited in bottom, settling section, by lead bullion escape orifice, emit, slag after reduction is emitted by slag escape orifice, depending on content of Pb&Zn, discards or further fuming process;
Reduction zone technology condition is:
Reduction zone temperature: 1050 ℃-1300 ℃,
Reductive agent is fine coal,
Flux is lime,
Oxygen pressure is 5 normal atmosphere, and oxygen volume content is 100%.
In the present embodiment, feed stock for blast furnace is the mixture that pyrite, zinc oxide ore, concentrate of lead sulfide ore and zinc sulfide concentrates form;
In the present embodiment, the mass percent of the high cadmia melt main component in reaction tower district is Zn30.07%, Pb20.81%, Fe16.51%, SiO 29.71%, CaO2.92%, S≤1%;
Mass percent containing Zn, Pb in the slag of settling section is 6.22%, Pb1.74%, and CaO/SiO in slag 2mass ratio be 0.86, FeO/SiO 2mass ratio be 2.16.
Embodiment 3
Zinc sulfide concentrates and containing the flash smelting melting method of smelting charge of lead and zinc, comprises the steps:
The first step: batching
Preparation mean particle size≤0.045mm, calculates by percentage to the quality, and composition comprises Zn30.16%, plumbous 12.16%, Fe14.42%, S20.08%, SiO 26.92%, CaO1.84%, H 2o≤0.3%, each constituent mass percent and be 100% leaded zinc pulverulent material;
Second step: oxidation sweetening
What by reinforced spray gun, the first step is obtained sprays into from reaction tower top containing smelting charge of lead and zinc and oxygen, containing smelting charge of lead and zinc, at reaction tower, complete oxidation desulfur reaction in the air, the high-concentration desulfurized flue gas of generation send relieving haperacidity operation through perpendicular liter after flue to waste heat boiler is lowered the temperature, gathered dust; The high cadmia melt producing descends slowly and lightly to the reaction tower district of reaction tower below;
The technology condition in reaction tower district is:
A reaction tower district temperature: 1050 ℃~1300 ℃,
B oxygen pressure is 5 normal atmosphere, and oxygen volume content is 100%.
The 3rd step: reduction
The high cadmia of liquid state in reaction tower district flows to reduction zone by the passage of partition wall below, in reduction zone, by two side nozzles, spray into reductive agent, flux and oxygen-rich air, the zinc in high cadmia melt is reduced generation zinc fume and collects by the lead-splash condenser in reduction flue gas processing device through zinc fume flue; Lead in high cadmia melt is reduced into metallic lead and traps the precious metal in high cadmia melt, passage by partition wall below flows to settling section, be deposited in bottom, settling section, by lead bullion escape orifice, emit, slag after reduction is emitted by slag escape orifice, depending on content of Pb&Zn, discards or further fuming process;
Reduction zone technology condition is:
A reduction zone temperature: 1050 ℃~1300 ℃,
B reductive agent is fine coal,
C flux is lime,
D oxygen pressure is 5 normal atmosphere, and oxygen volume content is 100%.
In the present embodiment, feed stock for blast furnace is the mixture that pyrite, secondary zinc oxide cigarette ash, concentrate of lead sulfide ore and zinc sulfide concentrates form;
In the present embodiment, the mass percent of the high cadmia melt main component in reaction tower district is Zn34.83%, Pb14..34%, Fe16.45%, SiO 28.16%, CaO2.15%, S≤1%;
Mass percent containing Zn, Pb in the slag of reduction settling section is 5.64%, Pb1.56%, and CaO/SiO in slag 2mass ratio be 0.91, FeO/SiO 2mass ratio be 2.24.

Claims (3)

1. containing a flash smelting method for smelting charge of lead and zinc, comprise the steps:
The first step: batching
The leaded zinc pulverulent material of preparation mean particle size≤0.045mm, calculates by percentage to the quality, and leaded zinc powder shape material component comprises Zn 15-35%, plumbous 5-30%, Fe 5-30%, S 10-30%, SiO 25-30%, CaO 0.5-10%, H 2o≤0.3%;
Second step: oxidation sweetening
What by reinforced spray gun, the first step is obtained sprays into from reaction tower top containing smelting charge of lead and zinc and oxygen, containing smelting charge of lead and zinc, at reaction tower, complete oxidation desulfur reaction in the air, the high-concentration desulfurized flue gas of generation send relieving haperacidity operation through perpendicular liter after flue to waste heat boiler is lowered the temperature, gathered dust; The high cadmia melt producing descends slowly and lightly to the reaction tower district of reaction tower below;
The technology condition in reaction tower district is:
Reaction tower district temperature: 1050 ℃-1300 ℃,
Amount of oxygen is for being oxidized to SO by the sulphur containing in smelting charge of lead and zinc 2the 60-150% of required oxygen theoretical amount;
The 3rd step: reduction
The high cadmia of liquid state in reaction tower district flows to reduction zone by the passage of partition wall below, in reduction zone, by two side nozzles, spray into reductive agent, flux and oxygen enrichment oxygen, the zinc in high cadmia melt is reduced generation zinc fume and collects by the lead-splash condenser in reduction flue gas processing device through zinc fume flue; Lead in high cadmia melt is reduced into metallic lead and traps the precious metal in high cadmia melt, passage by partition wall below flows to settling section, be deposited in bottom, settling section, by lead bullion escape orifice, emit, slag after reduction is emitted by slag escape orifice, depending on content of Pb&Zn, discards or further fuming process;
Reduction zone technology condition is:
Reduction zone temperature: 1050 ℃-1300 ℃,
Reductive agent is fine coal or Sweet natural gas, the 100-300% of the theoretical amount that consumption is is zinc by the zine ion Restore All in high cadmia melt;
Flux is selected from Silicon-rich, rich calcium mineral, at least one in lime, high calcium zinc ore, high willemite;
Amount of oxygen is the 50-200% that maintains the theoretical amount of oxygen of molten bath reduction institute heat requirement.
2. method according to claim 1, is characterized in that: describedly containing smelting charge of lead and zinc, be selected from least one and the mixture of zinc sulfide concentrates composition in pyrite, zinc oxide ore, ore of zinc silicate, Steel Plant's zinc smoke, utilising zinc containing waste residue, concentrate of lead sulfide ore, lead-acid accumulator clay, lead containing sludge.
3. method according to claim 1 and 2, is characterized in that: the mass percent of the high cadmia melt main component in reaction tower district is Zn 15-35%, plumbous 5-30%, Fe 5-30%, SiO 25-30%, CaO 0.5-10%, S≤1%; Mass percent containing Zn, Pb in the slag of settling section is Zn 2-8%, Pb0.5-2%, and CaO/SiO in slag 2mass ratio be 0.4-1.2, FeO/ SiO 2mass ratio be 1.0-3.0.
CN201310310891.6A 2013-07-23 2013-07-23 Flash smelting method and device for zinc sulfide concentrates and materials containing lead and zinc CN103382527B (en)

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