CN103382527A - 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 PDFInfo
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- CN103382527A CN103382527A CN2013103108916A CN201310310891A CN103382527A CN 103382527 A CN103382527 A CN 103382527A CN 2013103108916 A CN2013103108916 A CN 2013103108916A CN 201310310891 A CN201310310891 A CN 201310310891A CN 103382527 A CN103382527 A CN 103382527A
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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
Technical field
The present invention relates to flash smelting method and the equipment of a kind of zinc sulfide concentrates and leaded zinc material, belong to the non-ferrous metal metallurgy technical field.
Background technology
China is zinc producing country the biggest in the world, metallic zinc output was 5,130,000 tons in 2012, 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).Also there are following serious problems in the zinc hydrometallurgy traditional technology except the shortcoming such as have that technical process is long, investment is large, production cost is high and comprehensive recovery is poor: 1) iron vitriol slag enormous amount, can't process, and store up for a long time contaminate environment; Leached mud still needs pyrogenic attack, and energy consumption is large, and environment is abominable; 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 used for smelting itself, the very high (direct current consumption 〉=3000kwh/t) of zinc hydrometallurgy energy consumption.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, have still that investment is large, the problems such as maintenance of the equipment trouble and production cost height, particularly the leached mud individual curing is difficult, must include the 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 are high because of energy consumption, 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 that falls behind in closed blast furnace zinc metallurgy, and consumes a large amount of coke in reduction process, and economic and technical norms are compared with wet processing and do not had clear superiority, and particularly environmental pollution is serious.
Flash smelting has obtained successful Application in copper smelting and plumbous the smelting, have the advantages such as flow process is short, cost is low, index is good, its sharpest edges are: adopt the oxygen enrichment operation, increased substantially production efficiency, take full advantage of the oxidation reaction heat of sulphide ores, the energy consumption decrease, 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/tons of lead bullions.In contrast to this, the zinc hydrometallurgy production cost surpasses 4000 yuan/tons 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 smelted for zinc reclaim and solve the problems such as waste residue environmental pollution, and be significant.
But different from the concentrate of lead sulfide ore flash smelting is, the high lead slag that oxidation and cross reaction can obtain fusing point suitable (1100 ℃) and be fit to the various operations of flash smelting and requirement occurs in concentrate of lead sulfide ore in reaction tower, zinc is high, fusing point is high (Zn-60%) and bright sulfur zinc ore concentrate its product after desulphurization reaction contains, be difficult to reaction tower district automatic flowing from settling tank to the reduction zone, therefore at present there are no zinc sulfide concentrates flash smelting research and the report used.
Summary of the invention
Purpose of the present invention is long for the technical process that existing smelting process exists, waste water and residue contamination is serious, production cost is high (electrolytic power consumption 〉=3000kwh), comprehensively reclaims the serious problems such as poor, overcome the deficiency of prior art and be to provide flash smelting method and the equipment of a kind of zinc sulfide concentrates and leaded zinc material; Realize that continuous high-efficient smelts zinc sulfide concentrates and other various leaded zinc materials, have advantages of environment-protecting clean, energy consumption is low, production efficiency is high, comprehensive recovery is good.
The flash smelting method of a kind of zinc sulfide concentrates of the present invention and leaded zinc material comprises the steps:
The first step: batching
The leaded zinc powder shape material of preparation mean particle size≤0.045mm is calculated 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
The leaded zinc material that the first step is obtained by reinforced spray gun and oxygen spray into from the reaction tower top, leaded zinc material is completed oxidation desulfur reaction in the air at reaction tower, and the high-concentration desulfurized flue gas of generation send the relieving haperacidity operation through perpendicular the liter after flue to waste heat boiler is lowered the temperature, gathered dust; The high cadmia melt that produces 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 to be oxidized to SO with the sulphur in leaded zinc material
2The 60-150% of required oxygen theoretical amount; The pressure of oxygen is the 1-10 normal atmosphere, and oxygen content is 21-100%;
The 3rd step: reduction
The liquid high cadmia in reaction tower district flows to the reduction zone by the passage of partition wall below, in the reduction zone, spray into reductive agent, flux and oxygen enrichment oxygen by two side nozzles, the zinc in high cadmia melt is reduced the generation zinc fume and collects by the lead-splash condenser in the reduction flue gas processing device through the zinc fume flue; Lead in high cadmia melt is reduced into metallic lead and captures precious metal in high cadmia melt, flow to settling section by the passage below partition wall, be deposited in bottom settling section, emit by the lead bullion escape orifice, slag after reduction is emitted by the slag escape orifice, discards or further fuming process depending on content of Pb﹠Zn;
The reduction zone technology condition is:
The reduction zone temperature: 1050 ℃-1300 ℃,
Reductive agent is fine coal or Sweet natural gas, and consumption is is the 100-300% of the theoretical amount of zinc with the zine ion Restore All in high cadmia melt;
Flux is selected from Silicon-rich, rich calcium mineral, at least a in lime, high calcium zinc ore, high willemite;
Amount of oxygen is the 50-200% that keeps the theoretical amount of oxygen of molten bath reduction institute heat requirement; The pressure of oxygen is the 1-10 normal atmosphere, and oxygen content (volume content) is 21-100%.
The application of the flash smelting device of a kind of zinc sulfide concentrates and leaded zinc material, described leaded zinc material are selected from the mixture that at least a and zinc sulfide concentrates 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 forms.
The application of the flash smelting device of a kind of zinc sulfide concentrates and leaded zinc material, 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%; The mass percent that contains Zn, Pb in the settling section slag 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.
The flash smelting equipment of a kind of zinc sulfide concentrates and leaded zinc material comprises the 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 the Three regions that the bottom is interconnected, and is respectively reaction tower district, reduction zone, settling section; In the reaction tower district, be provided with successively perpendicular rise flue, reaction tower along the vertical direction of body of heater bottom surface; In the reduction zone, be provided with the zinc fume flue along the vertical direction of body of heater bottom surface, on the body of wall of body of heater both sides, be respectively arranged with the nozzle that extends to the body of heater inner chamber; At settling section, be provided with lead bullion escape orifice and slag escape orifice, and the slag escape orifice in the position of vertical direction than the height of lead bullion escape orifice.
The flash smelting equipment of a kind of zinc sulfide concentrates of the present invention and leaded zinc material, described reaction tower are the cylinder shape space that copper water jacket consists of, and 1-4 reinforced spray gun arranged at the top, and the bottom is communicated with smelting furnace body bottom rectangle space.
The flash smelting equipment of a kind of zinc sulfide concentrates of the present invention and leaded zinc material, described reaction tower diameter is 2-6 rice, is highly 2-10 rice.
The flash smelting equipment of a kind of zinc sulfide concentrates of the present invention and leaded zinc material, 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.
The flash smelting equipment of a kind of zinc sulfide concentrates of the present invention and leaded zinc material, described zinc fume flue is connected with peripheral hardware reduction flue gas processing device, and the reduction flue gas processing device comprises lead-splash condenser.
The flash smelting equipment of a kind of zinc sulfide concentrates of the present invention and leaded zinc material, described nozzle quantity are 1-20, and the cross-sectional area of each nozzle is 5-100cm
2, the angle α between nozzle axis and horizontal plane is-30.≤α≤30。Be provided with the coffin that copper water jacket surrounds above the slag line of molten bath, reduction zone, it is highly 1-6 rice, and described coffin is connected with the zinc fume flue.
Technological process principle of the present invention sketch under:
At 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 ℃, ZnO, the FeO that oxidation generates, and the composition such as PbO act on each other and being dissolved in the molten bath, the leaded high cadmia melt of the high ferro that newly increases flows to molten pool reducing furnace automatically by chute, a large amount of heat is emitted in the reaction of oxygen and most of reductive agent in molten pool reducing furnace, to keep 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
The applicant according to slag phasor and lead-zinc production practice find: when slag contains zinc 35% when following, Pb, FeO, SiO
2, when the CaO equal size meets certain requirements, the fusing point of leaded high cadmia is below 1200 ℃, its every slag character can satisfy 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 that obtains after oxidation sweetening is descended slowly and lightly in the molten bath, at this moment, high cadmia contains zinc below 35%, fusing point≤1200 ℃, and the every character of slag can satisfy the requirement of oxygen enrichment flash smelting.Liquid high cadmia is by the passage of partition wall below, automatically flow into the reduction zone, and in reduction zone and the reductive agent generation reduction reaction that blasts: by controlling the ratio of reductive agent and oxygen, keeping the molten bath is strong reducing property atmosphere and satisfied reduction institute's heat requirement and temperature requirement, reduce by oxygen enrichment 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 capture recovery by lead, for zinc sulfide concentrates and leaded zinc material provide 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 that takes full advantage of, energy consumption is saved more than 50% than conventional wet zinc metallurgy and closed blast furnace zinc metallurgy at least;
2). can realize the oxygen enrichment operation, production efficiency increases substantially;
3). no longer produce the zinc hydrometallurgy waste residue, can thoroughly solve it to the chronic pollution problem of 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, under the prerequisite that guarantees sulphur relieving haperacidity, reclaim in passing gold and take full advantage of its combustion heat and increase iron and carry 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, contain the leaded zinc material of zinc low value low, that fluorine-containing chlorine is high.
Description of drawings
Accompanying drawing 1 is the flash smelting device structure schematic diagram of the leaded zinc material of the present invention
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, the flash smelting equipment of a kind of zinc sulfide concentrates of the present invention and leaded zinc material comprises the 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 the Three regions that is interconnected of bottom, is respectively reaction tower district, reduction zone, settling section; In the reaction tower district, be provided with successively perpendicular rise flue 1, reaction tower 2 along the vertical direction of body of heater bottom surface; In the reduction zone, be provided with zinc fume flue 8 along the vertical direction of body of heater bottom surface, on the body of wall of body of heater both sides, be respectively arranged with the nozzle 9 that extends to the body of heater inner chamber; At 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, there is 1-4 reinforced spray gun 4 in the cylinder shape space that reaction tower 2 consists of for copper water jacket, top, and the bottom is communicated with the 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 the 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, be provided with the coffin that copper water jacket surrounds above the slag line of molten bath, reduction zone, it is highly 1-6 rice, and described coffin is connected with the zinc fume flue.
The flash smelting melting method of a kind of zinc sulfide concentrates and leaded zinc material 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 powder shape material;
Second step: oxidation sweetening
The leaded zinc material that the first step is obtained by reinforced spray gun and oxygen spray into from the reaction tower top, leaded zinc material is completed oxidation desulfur reaction in the air at reaction tower, and the high-concentration desulfurized flue gas of generation send the relieving haperacidity operation through perpendicular the liter after flue to waste heat boiler is lowered the temperature, gathered dust; The high cadmia melt that produces 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 the oxygen volume content is 100%.
The 3rd step: reduction
The liquid high cadmia in reaction tower district flows to the reduction zone by the passage of partition wall below, in the reduction zone, spray into reductive agent, flux and oxygen-rich air by two side nozzles, the zinc in high cadmia melt is reduced the generation zinc fume and collects by the lead-splash condenser in the reduction flue gas processing device through the zinc fume flue; Lead in high cadmia melt is reduced into metallic lead and captures precious metal in high cadmia melt, flow to settling section by the passage below partition wall, be deposited in bottom settling section, emit by the lead bullion escape orifice, slag after reduction is emitted by the slag escape orifice, discards or further fuming process depending on content of Pb﹠Zn;
The reduction zone technology condition is:
The reduction zone temperature: 1050 ℃-1300 ℃,
Reductive agent is fine coal,
Flux is lime,
Oxygen pressure is 5 normal atmosphere, and the 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%;
The mass percent that contains Zn, Pb in the settling section slag is 6.22%, Pb1.74%, and CaO/SiO in slag
2Mass ratio be 0.86, FeO/SiO
2Mass ratio be 2.16.
The flash smelting melting method of a kind of zinc sulfide concentrates and leaded zinc material 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 powder shape material;
Second step: oxidation sweetening
The leaded zinc material that the first step is obtained by reinforced spray gun and oxygen spray into from the reaction tower top, leaded zinc material is completed oxidation desulfur reaction in the air at reaction tower, and the high-concentration desulfurized flue gas of generation send the relieving haperacidity operation through perpendicular the liter after flue to waste heat boiler is lowered the temperature, gathered dust; The high cadmia melt that produces 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 ℃,
The B oxygen pressure is 5 normal atmosphere, and the oxygen volume content is 100%.
The 3rd step: reduction
The liquid high cadmia in reaction tower district flows to the reduction zone by the passage of partition wall below, in the reduction zone, spray into reductive agent, flux and oxygen-rich air by two side nozzles, the zinc in high cadmia melt is reduced the generation zinc fume and collects by the lead-splash condenser in the reduction flue gas processing device through the zinc fume flue; Lead in high cadmia melt is reduced into metallic lead and captures precious metal in high cadmia melt, flow to settling section by the passage below partition wall, be deposited in bottom settling section, emit by the lead bullion escape orifice, slag after reduction is emitted by the slag escape orifice, discards or further fuming process depending on content of Pb﹠Zn;
The reduction zone technology condition is:
A reduction zone temperature: 1050 ℃～1300 ℃,
The B reductive agent is fine coal,
C flux is lime,
The D oxygen pressure is 5 normal atmosphere, and the 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%;
The mass percent that contains Zn, Pb in reduction settling section slag is 5.64%, Pb1.56%, and CaO/SiO in slag
2Mass ratio be 0.91, FeO/SiO
2Mass ratio be 2.24.
Claims (10)
1. the flash smelting method of a leaded zinc material, comprise the steps:
The first step: batching
The leaded zinc powder shape material of preparation mean particle size≤0.045mm is calculated 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
The leaded zinc material that the first step is obtained by reinforced spray gun and oxygen spray into from the reaction tower top, leaded zinc material is completed oxidation desulfur reaction in the air at reaction tower, and the high-concentration desulfurized flue gas of generation send the relieving haperacidity operation through perpendicular the liter after flue to waste heat boiler is lowered the temperature, gathered dust; The high cadmia melt that produces 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 to be oxidized to SO with the sulphur in leaded zinc material
2The 60-150% of required oxygen theoretical amount;
The 3rd step: reduction
The liquid high cadmia in reaction tower district flows to the reduction zone by the passage of partition wall below, in the reduction zone, spray into reductive agent, flux and oxygen enrichment oxygen by two side nozzles, the zinc in high cadmia melt is reduced the generation zinc fume and collects by the lead-splash condenser in the reduction flue gas processing device through the zinc fume flue; Lead in high cadmia melt is reduced into metallic lead and captures precious metal in high cadmia melt, flow to settling section by the passage below partition wall, be deposited in bottom settling section, emit by the lead bullion escape orifice, slag after reduction is emitted by the slag escape orifice, discards or further fuming process depending on content of Pb﹠Zn;
The reduction zone technology condition is:
The reduction zone temperature: 1050 ℃-1300 ℃,
Reductive agent is fine coal or Sweet natural gas, and consumption is is the 100-300% of the theoretical amount of zinc with the zine ion Restore All in high cadmia melt;
Flux is selected from Silicon-rich, rich calcium mineral, at least a in lime, high calcium zinc ore, high willemite;
Amount of oxygen is the 50-200% that keeps the theoretical amount of oxygen of molten bath reduction institute heat requirement.
2. method according to claim 1 is characterized in that: described leaded zinc material is selected from the mixture that at least a and zinc sulfide concentrates 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 forms.
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 Zn15-35%, plumbous 5-30%, Fe5-30%, S10-30%, SiO
25-30%, CaO0.5-10%, S≤1%; The mass percent that contains Zn, Pb in the settling section slag 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.
4. the flash smelting equipment of a leaded zinc material, comprise the smelting furnace body, the coffin that described smelting furnace body bottom is built into for refractory materials, described coffin is provided with 2 partition walls, smelting furnace body bottom is divided into the Three regions that the bottom is interconnected, and is respectively reaction tower district, reduction zone, settling section; In the reaction tower district, be provided with successively perpendicular rise flue, reaction tower along the vertical direction of body of heater bottom surface; In the reduction zone, be provided with the zinc fume flue along the vertical direction of body of heater bottom surface, on the body of wall of body of heater both sides, be respectively arranged with the nozzle that extends to the body of heater inner chamber; At settling section, be provided with lead bullion escape orifice and slag escape orifice, and the slag escape orifice in the position of vertical direction than the height of lead bullion escape orifice.
5. the flash smelting equipment of a kind of leaded zinc material according to claim 4 is characterized in that: described reaction tower is the cylinder shape space that copper water jacket consists of, and 1-4 reinforced spray gun arranged at the top, and the bottom is communicated with smelting furnace body bottom rectangle space.
6. the flash smelting equipment of a kind of leaded zinc material according to claim 4, it is characterized in that: described reaction tower diameter is 2-6 rice, is highly 2-10 rice.
7. the flash smelting equipment of a kind of leaded zinc material according to claim 4 is characterized in that: partition wall is made by the outer lining refractories of copper water jacket.
8. the flash smelting equipment of a kind of leaded zinc material according to claim 4, it is characterized in that: be provided with the coffin that copper water jacket surrounds above the slag line of molten bath, reduction zone, it is highly 1-6 rice, and described coffin is connected with the zinc fume flue.
9. the flash smelting equipment of a kind of material containing zinc according to claim 4 is characterized in that: 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.
10. the flash smelting equipment of a kind of leaded zinc material according to claim 4 is characterized in that: described nozzle quantity is 1-20, and the cross-sectional area of each nozzle is 5-100cm
2, the angle α between nozzle axis and horizontal plane is-30 °≤α≤30 °.
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| CN103937985A (en) * | 2014-04-18 | 2014-07-23 | 中国恩菲工程技术有限公司 | Continuous fuming furnace and continuous fuming process adopting continuous fuming furnace |
| CN105316492A (en) * | 2015-11-30 | 2016-02-10 | 王浩 | Zinc smelting method |
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