CN102146519B - Sintering-free desulfurization coke-free reduction lead smelting method and pulverized coal reduction lead smelting double-chamber furnace - Google Patents
Sintering-free desulfurization coke-free reduction lead smelting method and pulverized coal reduction lead smelting double-chamber furnace Download PDFInfo
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The method for reducing and smelting lead by a single furnace without sintering, desulfurizing and coking carbon comprises the following steps: 1. a partition wall is arranged in a single furnace, two gas-phase space chambers are formed in one furnace body, and one gas-phase space chamber is used as an oxidation chamber meeting the requirements of an oxidation desulfurization process; the other gas-phase space chamber is used as a reduction chamber meeting the requirements of the reduction smelting process; the oxidation chamber and the reduction chamber are respectively provided with a flue gas outlet; the lower part of the partition wall is provided with a through hole for communicating the oxidation chamber with the reduction chamber; 2. mixing a lead-containing material, limestone serving as a slagging additive and quartz stone according to a process, preparing granules containing 8-10% of water by using a disc granulator, and conveying the granules into an oxidation chamber by using a belt conveyor; 3. oxygen is sprayed into the molten pool from the oxidation chamber furnace body for desulfurization; meanwhile, reducing agent pulverized coal, oxygen-enriched air and nitrogen cooling water as protective gas are directly sprayed into the slag from the reduction chamber; the reaction temperature of the oxidation section is 1100 +/-50 ℃, and the reaction temperature of the reduction section is 1200 +/-50 ℃; realizing the smelting of lead by non-sintering desulfurization and non-coke carbon reduction; the through-holes communicate the slag and the metal. The invention also relates to a smelting device of the double chamber furnace for lead smelting by reducing the oxidized desulfurized pulverized coal.
Description
Technical field the invention belongs to Metal smelting field, relates in particular to a kind of smelting process of lead, and particularly a kind of single stove, without sintering desulfuration without the plumbous method of coke reduction refining, the invention still further relates to the plumbous dual chamber furnace smelting apparatus of a kind of oxidation sweetening fine coal reduction refining.
The current bottom convertor of background technology adds the major technique that blast furnace is lead smelting in China.But bottom convertor produces rich lead skim need to be cooling, after casting slag, also need through retailoring of blast furnace, this process has expended the heat of slag, increases process procedure, and loss mouth is many, even more serious in casting slag process.Blast furnace is a conventional art, although technology maturation, the one, need to consume secondary energy coke, the 2nd, thermo-efficiency is low, and consumption is high; Moreover be blast furnace requirement process positive pressure operation, in reduction process, can produce a large amount of dust and flue dust, environmental pollution is serious, smelts district or toxic dust harm seriously, there is respectively in recent years plumbous periphery colony of the plant area lead poisoning event of smelting, main or relevant with blast furnace smelting technique.
Non-ferrous metals industry is the key industry of Eleventh Five-Year Plan propulsion energy-saving consumption reduction, and blast furnace smelting lead has entered the superseded stage.Therefore, a kind of new lead smelting method of domestic urgent need.
Summary of the invention the technical problem to be solved in the present invention is to provide a kind of single stove without coke reduction, to refine plumbous method without sintering desulfuration, it is that oxidation sweetening reduces again two plumbous processing steps of refining that the method has realized in single stove, meet that the size of capacity is large, level of automation is high, it is low to consume energy, thermo-efficiency utilize high, reduce melting cost and the little refining splicer skill of environmental pollution.
Second technical problem that the present invention will solve is to provide a kind of oxidation sweetening fine coal reduction refining plumbous dual chamber furnace smelting apparatus, at a body of heater, builds oxidizing chamber and reduction chamber.
A kind of single stove provided by the invention is without sintering desulfuration without the plumbous method of coke reduction refining, and its technical scheme is:
1, in separate unit stove, partition wall is set, forms two gas-phase space chambers in a body of heater, one of them gas-phase space chamber is as the oxidizing chamber that meets oxidation desulfuration process requirement; Another gas-phase space chamber is as the reduction chamber that meets retailoring processing requirement; And in oxidizing chamber and reduction chamber, exhanst gas outlet is set respectively; The through hole that oxidizing chamber is connected with reduction chamber is established in partition wall bottom;
2, using lead-containing materials such as concentrate of lead sulfide ore, lead fume dirt, coal dust, high plumbous leached mud, scrap lead, battery terminal pastes with as Wingdale and the quartzite of slag-making addition, by technique, prepare burden, through machine-processed moisture 8～10% the particle that obtains of disk pelletizing, by rotary conveyor, from opening for feed, send into oxidizing chamber;
3, oxygen is with 500～850m
3/ h directly sprays into desulfurization the melt in molten bath from oxidizing chamber body of heater side lower part by oxygen spray device; Meanwhile, reductive agent fine coal with 300～500kg/h, oxygen-rich air with 70～120m
3/ h, as the nitrogen of shielding gas with 55～65m
3/ h, water coolant directly spray into slag by pulverized coal injecting apparatus from reduction chamber side lower part with the speed of 15～18L/h; Oxidation panel temperature of reaction is 1100 ± 50 ℃, and reduction section temperature of reaction is 1200 ± 50 ℃; Use coal dust to add oxygenized air combustion supporting and by secondary oxygen jet apparatus, add supplemental heat source in stove from upper of furnace body and end, or add oxygenized air combustion supporting by Sweet natural gas or coal-seam gas, realize without sintering desulfuration, plumbous without coke retailoring; The through hole that partition wall bottom is provided with is communicated with the slag phase of oxidation panel and reduction section and metallographic phase, forms the convection channel of metal and slag, and plumbous from putting plumbous mouthful continuous blow-down, after reduction, slag is by slag-drip opening continuous blow-down or intermittent discharge.
According to final slag composition, supplement the add-on as Wingdale and the quartzite of slag-making addition.Slag type: FeO 28～36%, CaO 15～18%, SiO
222～28%.
In order to utilize residual heat of reaction, as of the present invention perfect, at the exhanst gas outlet of oxidizing chamber setting, by going straight up to flue, connect boiler and carry out UTILIZATION OF VESIDUAL HEAT IN, flue gas is qualified discharge after purification system is processed relieving haperacidity; The exhanst gas outlet arranging in reduction chamber carries out UTILIZATION OF VESIDUAL HEAT IN, qualified discharge after bag collection by going straight up to flue connection boiler.
In the present invention: oxygen is with 500～850m
3/ h directly sprays into the melt in molten bath by oxygen spray device from body of heater oxidation panel side lower part, reaches oxidation sweetening and utilizes the object of reaction heat melting materials capable; Simultaneously, the oxygen-rich air and the fine coal that from reduction chamber side lower part, directly spray into slag all reach with slag direct effect the effect of accelerating reduction reaction of bringing out, the effect that nitrogen plays cooling jet and manufactures cavity, water is sprayed in stove by pulverized coal injecting apparatus after by nitrogen atomization, plays strengthening cooling jet and brings out water-gas reaction and accelerate reduction reaction effect.
The technical requirements that enters stove material is: leaded more than 30%, contain zinc below 10%, sulfur-bearing >=13%;
The technical requirements of fine coal is: containing solid carbon 56～80%, ash content is below 8%, and volatile matter is below 8%, moisture≤2%, sulphur≤1%; Fine coal particle diameter 80 order～200 orders;
The technical requirements of quartzite is: containing SiO
2>=90%, Fe
2o
3≤ 3%;
The technical requirements of Wingdale is: containing CaO>=50%, and SiO
2≤ 3%.
Quartzite and Wingdale are slag-making additions, for material in stove is carried out to slag making, separated with the lead bullion after reduction to reach slag.The fundamental principle of slag-making addition add-on is that to make the weight percent of iron protoxide and the weight percent sum of calcium oxide be between 1.8～2.3 for the weight percent ratio of silicon-dioxide, i.e. FeO+CaO/SiO
2=1.8～2.3.
The technical requirements of oxygen-rich air is: oxygen level 70～85%, a nitrogen content 15～30%; Wherein the nitrogen content of nitrogen is not less than 99%.
The present invention has realized without sintering desulfuration, without the plumbous dual chamber furnace refining of coke reduction refining splicer skill, realizes two processing requirements in separate unit stove, is better than bottom convertor completely and adds blast furnace, is more better than sinter machine and adds blast furnace.
The invention has the advantages that: in a blind roaster, realize the requirement of plumbous two process procedures of oxidation sweetening fine coal reduction refining, simplified technique unit, other technique all needs two above smelting technology unit; This technique is obviously better than bottom convertor and adds Lead Smelting in Blast Furnace technique, and liquid slag does not need to be cooled to solid block in a stove, and reductive agent does not need secondary energy coke, fine coal amount ratio blast-furnace coke consumption significantly reduces, energy consumption is low, and utilization rate of waste heat is high, and energy consumption index is better than industry allowance value; Technique realizes negative-pressure operation, good leak tightness, and dust and regional lead poisoning basically eliminate, every discharge index is lower than the relevant License Value of country; Process automation degree is high, and operation labour intensity is low, and technique unit is simplified, and completely realizes and maximizing, and carries out in the industry can eliminating blast furnace completely.
The plumbous dual chamber furnace smelting apparatus of a kind of oxidation sweetening fine coal reduction refining provided by the invention, the technical scheme of taking is:
The plumbous dual chamber furnace smelting apparatus of oxidation sweetening fine coal reduction refining, comprises horizontal circular body of heater, it is characterized in that: in horizontal circular body of heater, be provided with partition wall, partition wall is divided into oxidizing chamber and reduction chamber by body of heater; Partition wall bottom is provided with through hole; Opening for feed is established at oxidizing chamber top, and oxidizing chamber side lower part is installed several to oxygen spray device, and oxidizing chamber end is established and put plumbous mouthful; Number Zhi Erci oxygen rifle is installed at reduction top, chamber, and reduction chamber side lower part is installed several to reduction jet apparatus, and slag-drip opening is established in reduction end, chamber; Oxidizing chamber is respectively equipped with exhanst gas outlet with reduction chamber.
Oxygen spray device is connected with the mixing source of source of oxygen and nitrogen G&W; Reduction jet apparatus is connected with the mixing source of fine coal divider, source of oxygen and nitrogen G&W.
It is oxygen rifle that every group of source of oxygen connects two cover oxygen spray devices, and single oxygen rifle setting angle and vertical direction angle are 16～28 °; Each voltage stabilizing supply warehouse connects two pulverized coal injecting apparatus, single pulverized coal injecting apparatus setting angle and vertical direction angle are 8～18 °, according to position different angles, vary in size, the size of every pulverized coal injecting apparatus angle is inversely proportional to the positional distance of putting plumbous mouthful, and the tricks of pulverized coal injecting apparatus is specifically determined according to production capacity and material characteristic in specific design.
The exhanst gas outlet of oxidizing chamber setting is connected boiler by going straight up to flue respectively with the exhanst gas outlet that reduction chamber arranges, and carries out UTILIZATION OF VESIDUAL HEAT IN.
The plumbous dual chamber furnace smelting apparatus of oxidation sweetening fine coal reduction refining of the present invention is provided with partition wall in a horizontal circular stove, and body of heater gas-phase space is divided into two chambers, and an oxidizing atmosphere chamber is oxidation panel; Another reducing atmosphere chamber is reduction section; Partition wall lower end is established a doghole two sections of slags and metal is communicated with, and forms the convection channel of metal and slag, and plumbous from putting plumbous mouthful continuous blow-down, after reduction, slag, also can intermittent discharge according to practical situation by slag-drip opening continuous blow-down.
Plumbum smelting horizontal circular melting dual chamber furnace device of the present invention, material after technique batching is granulated directly into stove, can process complicated low grade material completely, be conducive to resources effective utilization, processing power can reach 100t/h, is different from that bottom convertor adds blast furnace and sinter machine adds the vertical stockpile formula of blast furnace reduction furnace completely.
Utilize plumbum smelting horizontal circular melting dual chamber furnace device of the present invention to realize single stove of the present invention and without coke reduction, refine plumbous method without sintering desulfuration.Because the two technique units of redox complete in a stove, oxygen-rich concentration is high, flue gas SO
2concentration is high, exhaust gas volumn is little, and recovery of sulfur rate is high, and reductive agent is directly used fine coal without coke, fine coal is that be provided with by reduction chamber side lower part several directly spray into slag and participate in direct-reduction from lower portion of furnace body fine coal injection of reducing agent entrance, has greatly improved reaction efficiency.
The present invention adds retailoring of blast furnace with bottom convertor and compares, and its advantage is:
1, this technique only needs separate unit dual chamber furnace, blown converter adds two links of blast furnace needs, maximum unfavorable factor bottom convertor produces rich lead skim needs cooling casting mold to expend slag physical thermal and latent heat, and casting mold process has increased the loss mouth of many lead dusts and plumbous mist simultaneously, and operating environment is seriously polluted.
2, the principal reaction of lead blast furnace technique is solid and gas reaction, requires responding layer ventilation property to get well, and lead agglomerate material and coke will form stockpile, and that speed of response be take is solid, solid/liquid/gas reactions is as main, and speed of response is slow, requires superfluous CO concentration high; Processing requirement material is lead agglomerate material and coke, therefore liquid slag cooling forming will have been increased to process unit, and loss mouth is a lot, has increased the weight of the plumbous mist in operating area and dust, and environment is poor; Because entering, in stove, must be lumpy material, the essential coke that adds, solid-state cold burden finally will form liquid its melting process needs heat, will principal reaction occur between solid and gas simultaneously, has increased coke usage quantity, and production cost is improved.
And redox completes in a stove in the present invention, do not need extra heat melts, both improved heat utilization rate, shortened the recovery time again, reduced the unit of process.
3, blast furnace needs hot blast, and furnace gas amount strengthens, and adds a large amount of air and blasts and will certainly take away a large amount of heats, increases the usage quantity of coke; Blast furnace loss mouth is many, exists stopping property poor, requires operation malleation, and operating environment is poor, easily sends out lead poisoning.This processing requirement negative-pressure operation, is easy to environment dust flue gas and controls.
And the novel furnace that the present invention adopts adopts fully-closed structure, good heat preservation performance, technological process adopts negative-pressure operation, and environmental aspect is good, and waste heat enters waste heat boiler with flue gas and reclaims, and has improved heat utilization rate, meets the requirement of country's present stage energy-saving and emission-reduction completely.
4, traditional technology adopts coke as reductive agent, and more than Lead Smelting in Blast Furnace consumes coke 450Kg/t at present, and this technique consumption fine coal is no more than 230Kg/t.This technique generally all adopts maximization body of heater simultaneously, is easy to improve industrial concentration, is beneficial to level of comprehensive utilization and improves, and UTILIZATION OF VESIDUAL HEAT IN is to be easy to realize, and has greatly saved the energy.
5, current, National Development and Reform Committee clearly sends the documents and forbids newly-built new blast furnace plant, and the present invention can well make up the technical requirements of rich lead skim reducing, has good development prospect.
The present invention is practical application in the technological transformation of the former introduction QSL of Northwest Lead Zinc factory one-way fired furnace, and introduction QSL one-way fired furnace is transformed into the plumbous dual chamber furnace smelting apparatus of oxidation sweetening fine coal reduction refining.
On the QSL type of furnace basis that Yuan Northwest Lead Zinc factory introduces, in stove, add and changed partition wall, change flue gas air chamber, in reduction section cinder notch upper end, set up and go straight up to flue and waste heat boiler and bag-type dust removal system, former flue gas system is not changed, as oxidation panel smoke processing system, make oxidation sweetening flue gas separated with reduction refining lead fume, meet the operational characteristic requirement separately of oxidation panel and reduction section.Realized and fine coal retailoring is plumbous again without sintering oxidation desulfurization, having changed former QSL stove only has a set of flue gas to process, and can not process the defect of complicated raw material, has really reformed lead smelting technology, realization is without sintering desulfuration, without coke, reduces single stove technique unit refining splicer skill.
Accompanying drawing explanation
Fig. 1 is the structure iron of the plumbous dual chamber furnace smelting apparatus of oxidation sweetening fine coal reduction refining;
Fig. 2 is that in Fig. 1, B-B sectional view is that oxygen-rich air jet apparatus is installed view;
Fig. 3 is that in Fig. 1, A-A sectional view is curtain wall structure figure;
Fig. 4 is that in Fig. 1, C-C sectional view is that pulverized coal injecting apparatus is installed view;
Fig. 5 is fine coal feeding machine structure iron;
Fig. 6 is the structural representation of pulverized coal injecting apparatus;
Fig. 7 is the D-D sectional view of Fig. 6;
Fig. 8 is the structural representation of oxygen spray device
Fig. 9 is the E-E sectional view of Fig. 8.
In figure: 1-oxidizing chamber, 2-reduces chamber, 3-exhanst gas outlet, 4-opening for feed, 5-partition wall, 501-through hole, bis-oxygen rifles of 6-, 7-reduces jet apparatus, 8-oxygen spray device, 9-slag-drip opening, 10-access hole, 11-accident slag-drip opening, 12-oil burner, 13-siphon lead tap, 14-revolving gear, 15-support idler roller, 16-horizontal circular body of heater, 17-coal store, 18-bagroom, 19-fine coal passage, 19a-fine coal source channels, 20-reduction oxygen channel, 20a-reduction source of oxygen, nitrogen G&W hybrid channel is used in 21-reduction, the mixing source of nitrogen G&W for 21a-reduction, house steward is sprayed in 22-reduction, 23-transfer line, 24-oxidation rifle sprays house steward, nitrogen G&W hybrid channel is used in 25-oxidation, the mixing source of nitrogen G&W for 25a-oxidation, 26-oxidation oxygen channel, 26a-oxidation source of oxygen.
Embodiment is further described the present invention below in conjunction with accompanying drawing.
Install embodiment as shown in Figures 1 and 3: the plumbous dual chamber furnace smelting apparatus of a kind of oxidation sweetening fine coal reduction refining, comprise horizontal circular body of heater 16, it is characterized in that: in horizontal circular body of heater 16, be provided with the partition wall 5 that adopts fire-resistant brick system, partition wall 5 thickness b are 550cm; Partition wall 5 is divided into oxidizing chamber 1 and reduction chamber 2 by body of heater, to guarantee oxidizing atmosphere and the reducing atmosphere of two Room; Partition wall 5 bottoms are provided with through hole 501, and through hole 501 is communicated with oxidizing chamber 1 with slag and the metallographic phase of reduction chamber, form the convection channel of metal and slag, and there is the distance of 300～400 centimetres through hole 501 lower edges apart from bottom of furnace body, and through hole 501 height h are 450 centimetres; Three opening for feeds 4 are established at oxidizing chamber 1 top, and oxidizing chamber 1 side lower part is installed three pairs of oxygen spray devices 8, and siphon lead tap 13 is established in oxidizing chamber 1 end; Six secondary oxygen jet apparatus 6 that use when reduction 2 tops, chamber are provided with combustion air and some oven, reduction chamber 2 side lower parts are installed seven pairs of reduction jet apparatus 7, and slag-drip opening 9 is established in reduction 2 ends, chamber; Oxidizing chamber 1 is respectively equipped with exhanst gas outlet 3 with reduction chamber 2; Referring to Fig. 8 and Fig. 6: oxygen spray device 8 is connected connection respectively with source of oxygen 26a, oxidation for oxidation with the mixing source 25a of nitrogen G&W; Reduction jet apparatus 7 is connected respectively with the mixing source 21a of nitrogen G&W with source of oxygen 20a and reduction with fine coal divider, reduction.
Reduction jet apparatus 7 is supplied reductive agents as pulverized coal injecting apparatus to reduction chamber 2, and reductive agent is supplied with by fine coal divider; Referring to Fig. 5: fine coal divider comprises bagroom 18 and coal store 17, and coal store 17 tops arrange bagroom 18, coal store 17 bottoms by fine coal source channels 19a with reduce jet apparatus 7 and be connected, transfer line 23 is connected with coal store 17 tops.For being prepared by fine coal to the fine coal in workshop, send into coal store 17.Pressurized nitrogen is sent into coal store 17 by fine coal through transfer line 23 as conveyance fluid, and delivery safety is reliable, guarantees that the fine coal of sending into coal store 17 does not burn, and can not explode, and guarantees reducing agent supply system safety in production.
Shown in Fig. 2 and Fig. 4 is respectively the scheme of installation of oxygen spray device 8 and reduction jet apparatus 7, and every jet apparatus setting angle is 8～28 ° with the angle of vertical direction, according to the different corner dimensions in position also difference.The reduction jet apparatus 7 of take is example: reduction jet apparatus 7 is inversely proportional to the angular dimension of angle β a and the positional distance of siphon lead tap 13 of vertical direction, first pair of reduction jet apparatus 7 setting angle near left side oxidizing chamber 1 are 18 ° with the angle β a of vertical direction, and near the 7th pair of reduction jet apparatus 7 of body of heater right side slag-drip opening 9 and the angle β a of vertical direction, are 8 ° away from oxidizing chamber 1.Identical with reduction jet apparatus 7, oxygen spray device 8 as oxygen spray device is inversely proportional to the angular dimension of angle β b and the positional distance of siphon lead tap 13 of vertical direction, the first pair of oxygen spray device 8 that is bordering on siphon lead tap 13 is 28 ° with the angle β b of vertical direction, and the 3rd pair of oxygen spray device 8 that is distal to siphon lead tap 13 is 15 ° with vertical direction angle β b.
Referring to Fig. 6 and Fig. 7: reduction jet apparatus 7 comprises that reduction rifle sprays house steward 22, the rifle injection house steward 22 that reduces is provided with the reduction of annular fine coal passage 19, annular and with the reduction of oxygen channel 20 and annular, uses the hybrid channel 21 of nitrogen and water, fine coal passage 19 is communicated with fine coal source channels 19a, and reduction is communicated with, reduces with source of oxygen passage 20a with reduction with oxygen channel 20 and is communicated with the mixing source 21a of nitrogen G&W with reduction with the hybrid channel 21 of water with nitrogen; Fine coal and oxygen, nitrogen G&W enter into and spray three annular tube shaped passages that house steward 22 is provided with from passage separately, and 14 the reduction jet apparatus 7 that are provided with from lower portion of furnace body by nozzle spray and enter in body of heater reduction chamber 2, participate in reaction in furnace.
Referring to Fig. 8 and Fig. 9: oxygen spray device 8 comprises that oxidation rifle sprays house steward 24, in oxidation rifle injection house steward 24, be provided with annular oxidation and use nitrogen G&W hybrid channel 25 with oxygen channel 26 and annular oxidation, oxidation is communicated with source of oxygen 26a with oxidation with oxygen channel 26, and oxidation is communicated with the mixing source 25a of nitrogen G&W with oxidation with water hybrid channel 25 with nitrogen; Six the oxygen spray devices 8 that are provided with by body of heater 16 bottoms spray and enter in body of heater oxidizing chamber 1, carry out desulfurization.
Referring to Fig. 1: the diameter of reduction chamber 2 that is greater than the reducing and smelting furnace of conduct as the diameter of the oxidizing chamber 1 of oxidizing semlting stove.Oxidizing chamber 1 top is provided with as baker heats up the oil burner 12 of heat is provided, horizontal circular body of heater 16 outer wall two ends are provided with mainly works the support idler roller 15 that supports body of heater effect, horizontal circular body of heater 16 outer wall one end are provided with transmitting gear 14, by transmitting gear 14, rotate and make horizontal circular body of heater 16 in 0 ° and 90 ° of two positions, meet off working state as the needs of maintenance, accident treatment and blowing out.Reduction 2 ends, chamber are also provided with access hole 10 and the accident slag-drip opening 11 for meeting emergencies and arranging.
The exhanst gas outlet 3 that oxidizing chamber 1 arranges is connected boiler by going straight up to flue respectively with the exhanst gas outlet 3 that reduction chamber 2 arranges, and carries out UTILIZATION OF VESIDUAL HEAT IN.
Above-described embodiment is not meaned the restriction to apparatus of the present invention; During practical application, according to the specification of body of heater and the size of capacity, determine the reduction quantity of jet apparatus 7 and the quantity of oxygen spray device 8.The major dimension of horizontal circular dual chamber furnace: oxidation panel molten bath is that oxidizing chamber 1 internal diameter is not less than 2.8m, should not be greater than 3.5m, and length should not be less than 10m, should not be greater than 18m; Reduction section molten bath is reduced chamber 2 internal diameters and should not be less than 2.4m, should not be greater than 3.0m, and body of heater overall length is that oxidation panel molten bath and reduction section molten bath overall length are at 35m to 50m.Concrete data should be determined calculating body of heater size according to the size of capacity and material characteristic.
Embodiment of the method 1
Using lead-containing materials such as concentrate of lead sulfide ore, lead fume dirt, coal dust, high plumbous leached mud, scrap lead, battery terminal pastes with as Wingdale and the quartzite of slag-making addition, by technique, prepare burden, through machine-processed moisture 8～10% the particle that obtains of disk pelletizing, by rotary conveyor, from opening for feed, send into oxidizing chamber;
Oxygen is with 500～850m
3/ h directly sprays into desulfurization the solution in molten bath from oxidizing chamber body of heater side lower part by oxygen spray device; Meanwhile, reductive agent fine coal with 300～500kg/h, oxygen-rich air with 70～120m
3/ h, as the nitrogen of shielding gas with 55～65m
3/ h, water coolant directly spray into slag by pulverized coal injecting apparatus from reduction chamber side lower part with the speed of 15～18L/h; Oxidation panel temperature of reaction is 1100 ± 50 ℃, and reduction section temperature of reaction is 1200 ± 50 ℃; Use coal dust to add oxygenized air combustion supporting and by secondary oxygen jet apparatus, add supplemental heat source in stove from upper of furnace body and end, or add oxygenized air combustion supporting by Sweet natural gas or coal-seam gas, realize without sintering desulfuration, plumbous without coke retailoring; The through hole that partition wall bottom is provided with is communicated with the slag phase of oxidation panel and reduction section and metallographic phase, forms the convection channel of metal and slag, and plumbous from putting plumbous mouthful continuous blow-down, after reduction, slag is by slag-drip opening continuous blow-down or intermittent discharge.
According to final slag composition, supplement the add-on as Wingdale and the quartzite of slag-making addition.Slag type: FeO 28～36%, CaO 15～18%, SiO
222～28%.
Claims (2)
1. single stove, without sintering desulfuration without the plumbous method of coke reduction refining, is characterized in that:
A, in separate unit stove, partition wall is set, forms two gas-phase space chambers in a body of heater, one of them gas-phase space chamber is as the oxidizing chamber that meets oxidation desulfuration process requirement; Another gas-phase space chamber is as the reduction chamber that meets retailoring processing requirement; And in oxidizing chamber and reduction chamber, exhanst gas outlet is set respectively; The through hole that oxidizing chamber is connected with reduction chamber is established in partition wall bottom;
B, concentrate of lead sulfide ore, lead fume dirt, coal dust, high plumbous leached mud, scrap lead, battery terminal are stuck with paste and by technique, prepared burden with quartzite as the Wingdale of slag-making addition, through machine-processed moisture 8～10% the particle that obtains of disk pelletizing, by rotary conveyor, from opening for feed, send into oxidizing chamber;
C, oxygen are with 500～850m
3/ h directly sprays into desulfurization the melt in molten bath from oxidizing chamber body of heater side lower part by oxygen spray device; Meanwhile, reductive agent fine coal with 300～500kg/h, oxygen-rich air with 70～120m
3/ h, as the nitrogen of shielding gas with 55～65m
3/ h, water coolant directly spray into slag by pulverized coal injecting apparatus from reduction chamber side lower part with the speed of 15～18L/h; Oxidation panel temperature of reaction is 1100 ± 50 ℃, and reduction section temperature of reaction is 1200 ± 50 ℃; Use coal dust to add oxygenized air combustion supporting and by secondary oxygen jet apparatus, add supplemental heat source in stove from upper of furnace body and end, or add oxygenized air combustion supporting by Sweet natural gas or coal-seam gas, realize without sintering desulfuration, plumbous without coke retailoring; The through hole that partition wall bottom is provided with is communicated with the slag phase of oxidation panel and reduction section and metallographic phase, forms the convection channel of metal and slag, and plumbous from putting plumbous mouthful continuous blow-down, after reduction, slag is by slag-drip opening continuous blow-down or intermittent discharge;
D, according to final slag composition, supplement the add-on as Wingdale and the quartzite of slag-making addition; Slag type: FeO28～36%, CaO15～18%, SiO
222～28%.
2. a kind of single stove as claimed in claim 1, without sintering desulfuration without the plumbous method of coke reduction refining, is characterized in that: the exhanst gas outlet of oxidizing chamber setting carries out UTILIZATION OF VESIDUAL HEAT IN by going straight up to flue connection boiler, and flue gas is qualified discharge after purification system is processed relieving haperacidity; The exhanst gas outlet arranging in reduction chamber carries out UTILIZATION OF VESIDUAL HEAT IN, qualified discharge after bag collection by going straight up to flue connection boiler.
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| CN103131869A (en) * | 2013-03-13 | 2013-06-05 | 山东恒邦冶炼股份有限公司 | Extraction method for high-lead high-silver arsenious complex gold concentrate |
| CN104862483A (en) * | 2015-05-13 | 2015-08-26 | 杨华锋 | Method for disposing secondary lead materials by high oxygen-enriched side-blown bath smelting combination acid-making system |
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| CN114657391B (en) * | 2022-03-25 | 2022-12-06 | 西安交通大学 | Lead carbide-free metallurgy device and method |
| CN115466852B (en) * | 2022-09-19 | 2023-07-25 | 西安交通大学 | Gradient gas-liquid atomization strengthening PbO reduction zero carbonization method and device |
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