CN111719045A - Oxygen-enriched intensified smelting method for horizontal reduction furnace - Google Patents

Oxygen-enriched intensified smelting method for horizontal reduction furnace Download PDF

Info

Publication number
CN111719045A
CN111719045A CN201910216984.XA CN201910216984A CN111719045A CN 111719045 A CN111719045 A CN 111719045A CN 201910216984 A CN201910216984 A CN 201910216984A CN 111719045 A CN111719045 A CN 111719045A
Authority
CN
China
Prior art keywords
oxygen
lead
slag
enriched
reduction furnace
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910216984.XA
Other languages
Chinese (zh)
Inventor
张宝国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gejiu Jinxing Antimony Industry Co ltd
Original Assignee
Gejiu Jinxing Antimony Industry Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gejiu Jinxing Antimony Industry Co ltd filed Critical Gejiu Jinxing Antimony Industry Co ltd
Priority to CN201910216984.XA priority Critical patent/CN111719045A/en
Publication of CN111719045A publication Critical patent/CN111719045A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B13/00—Obtaining lead
    • C22B13/02—Obtaining lead by dry processes
    • C22B13/025—Recovery from waste materials
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/0028—Smelting or converting
    • C22B15/0052—Reduction smelting or converting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B30/00—Obtaining antimony, arsenic or bismuth
    • C22B30/02—Obtaining antimony
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention provides an oxygen-enriched intensified smelting method for a horizontal reduction furnace, which is characterized by comprising the following steps: the method comprises the steps of uniformly mixing lead-antimony-containing copper slag and anthracite, feeding the lead-antimony-containing copper slag in two batches by adopting two feeding hoppers, respectively controlling the feeding of the two batches of materials and the spraying of oxygen-enriched air matched with the two batches of materials, gradually heating the materials to a smelting temperature, smelting, adding soda ash for slagging after the smelting is finished, and as the oxygen-enriched smelting furnace and the ground form a 10-degree inclination angle, firstly, taking out alkaline slag from a lead opening of the oxygen-enriched intensified reducing furnace, then, taking out slag of the oxygen-enriched intensified reducing furnace, finally, beating lead-antimony alloy out of an ingot by a lead pump, removing matte on the surface of the lead-antimony alloy, and separately piling up the slag, so that the smelting.

Description

Oxygen-enriched intensified smelting method for horizontal reduction furnace
Technical Field
The invention relates to the technical field of chemistry and metallurgy, in particular to a method for oxygen-enriched intensified smelting of a horizontal reduction furnace.
Background
At present, the domestic reduction furnace is generally a vertical furnace, and has the disadvantages of more supporting facilities, large occupied area, high investment, large raw material supply fluctuation inadaptation, small production scale and flexible production organization.
The horizontal reduction furnace is provided with only one charging opening, natural gas, pulverized coal and coke are used as fuel and reducing agent near the fuel opening on the top of the horizontal reduction furnace, and the problems of difficult material melting, slow temperature raising speed and high energy consumption can occur due to the fact that only one charging opening is provided, and the added raw materials are concentrated.
In some special places without natural gas supply conditions, where investment of a pulverized coal preparation system is high and consumption of fuel and reducing agent is low, fuel and reducing agent of the horizontal furnace only use anthracite, and the horizontal furnace using the anthracite as fuel and reducing agent basically does not adopt oxygen-enriched smelting. ,
in order to solve the problems, a method for oxygen-enriched intensified smelting by a horizontal reduction furnace is urgently needed to be developed.
Disclosure of Invention
The invention aims to provide an oxygen-enriched intensified smelting method for a horizontal reduction furnace.
The object of the invention is achieved by the following steps:
1) uniformly mixing lead-antimony-containing copper slag and anthracite according to the weight ratio of 100: 3-8, wherein a first feeding funnel and a second feeding funnel are arranged at the top of the oxygen-enriched enhanced reduction furnace, the mixed materials are loaded into the first feeding funnel and the second feeding funnel, the first feeding funnel and the second feeding funnel are square funnels, a first discharging pipe is arranged at the lower part of the first feeding funnel, a second discharging pipe is arranged at the lower part of the second feeding funnel, a first feeding valve is arranged at the upper section of the first discharging pipe, a second feeding valve is arranged at the upper section of the second discharging pipe, a first feeding port is arranged at the bottom of the first discharging pipe, a second feeding port is arranged at the bottom of the second discharging pipe, the first discharging pipe and the second discharging pipe are square, the length of the first discharging pipe is 300-plus-500 mm, and the side length of the first discharging pipe is 300;
2) adding materials at the top of the oxygen-enriched enhanced reduction furnace in two steps, wherein the first step is to open a first feeding valve for feeding 2-4 tons, then feeding 1-3 tons from a second feeding funnel, the adding amount of the oxygen-enriched air is that 50-100 m oxygen-enriched air is sprayed into each ton of granular materials, heating and melting are carried out for 1-2 hours, the second step is to feed, the first feeding valve is opened for feeding 3-5 tons, then feeding 2-4 tons from the second feeding funnel, the adding amount of the oxygen-enriched air is that 100-200 m oxygen-enriched air is sprayed into each ton of granular materials, and after the heating is carried out for 2-4 hours, the temperature in the furnace is gradually increased to 900-1100 ℃;
3) front and back of the oxygen-enriched reinforced reduction furnaceFour furnace doors are symmetrically arranged on two sides, an oxygen inlet is arranged in the middle of each furnace door, oxygen supply is stopped after the fact that materials in the furnace are completely observed from the furnace doors of the oxygen enrichment strengthened reduction furnace, the temperature in the furnace is controlled to be 900-1000 ℃, reduction smelting is carried out for 1-5 hours, most of PbO in a molten pool is converted into lead, lead and antimony generate lead-antimony alloy, and Cu in the molten pool2S and FeS are mutually melted to generate coarse matte, and FeO and CaO in the molten pool and SiO2 in anthracite are subjected to slagging reaction to form SiO2-FeO-CaO slag system, SiO control2The slag system of-FeO-CaO comprises 10 to 30 percent of CaO and 20 to 30 percent of SiO2And 40% -60% FeO, the slag type of this slag is the fusion body of silicate of iron calcium, possess the lowest melting point, viscosity is the minimum, help to reduce the smelting time and reduce the slag and contain lead, the reaction produces the high-temperature flue gas, lead in crude lead, slag and PbS in the flue gas produced reach the equilibrium, the reaction produces the high-temperature flue gas at the same time, exhaust after lowering the temperature and desulfurizing up to standard;
4) a molten pool of the oxygen-enriched enhanced reduction furnace forms an inclination angle of 10 degrees with the ground, a lead port is arranged on the left side of the front part of the oxygen-enriched enhanced reduction furnace, generated lead-antimony alloy, crude matte and slag of the oxygen-enriched enhanced reduction furnace flow into the rear end part of the oxygen-enriched enhanced reduction furnace, soda ash is added according to the weight of 1000: 0.2-0.5 to form slag for 0.5-1h, and due to the fact that specific gravity difference is large, a melt is naturally layered, the alkali slag is lightest, the slag of the oxygen-enriched enhanced reduction furnace is below the alkali slag, the matte is below the slag of the oxygen-enriched enhanced reduction furnace, and the lead-antimony alloy is heaviest, firstly, the alkali slag is taken out from the lead port of the oxygen-enriched enhanced reduction furnace, then the slag of the oxygen-enriched enhanced reduction furnace is taken out, finally, the lead-antimony alloy is.
As a further improvement of the invention, the lead-antimony-containing copper slag in the step (1) contains 60-80% of lead, 2-10% of antimony, 2-10% of copper and 1-5% of sulfur.
As a further improvement of the invention, the particle size of the pulverized coal in the step (1) is more than 80% of minus 200 meshes, wherein the pulverized coal contains 80-90% of carbon, 0.1-1.5% of sulfur, 8-15% of ash and 2-5% of volatile matters.
As a further improvement of the invention, the oxygen concentration of the oxygen-enriched air in the step (2) is 22-40%.
As a further improvement of the invention, in the step (4), the lead-antimony alloy contains more than 80% of lead and 5-19% of antimony, the crude matte contains 20-40% of copper and 15-25% of sulfur, the slag of the oxygen-enriched enhanced reduction furnace contains less than 3% of lead, less than 1% of antimony and less than 1% of copper, the caustic sludge contains 50-70% of alkali, 20-30% of arsenic and compounds and 5-10% of antimony and compounds.
The invention has the beneficial effects that:
1. the invention adopts oxygen-enriched intensified smelting, can shorten the smelting time and reduce the energy consumption.
2. The horizontal reduction furnace is uniformly distributed with 2 oxygen lances at two sides, can respectively control oxygen supply according to the smelting condition, is favorable for uniformly and rapidly melting materials in the furnace, and has convenient operation and strong controllability.
3. The invention adopts two feed inlets, the material distribution is uniform, the material accumulation is reduced, the material melting and melting time is accelerated, and the energy consumption is reduced.
4. The invention adopts 4 furnace doors, is beneficial to observing the smelting condition in the furnace, is beneficial to material distribution, improves the operation rate, shortens the slag tapping time and improves the operation rate.
5. The invention uses lead pump to cast lead-antimony alloy, which can reduce labor intensity.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a front view of the oxygen-enriched enhanced reduction of the present invention;
FIG. 3 is a plan view of the oxygen-enriched enhanced reduction furnace of the present invention.
Detailed Description
The present invention is further illustrated by the following examples and the accompanying drawings, but the present invention is not limited thereto in any way, and any modifications or alterations based on the teaching of the present invention are within the scope of the present invention.
Example 1
1) The lead-antimony-copper slag contains 60% of lead, 10% of antimony, 10% of copper and 5% of sulfur; the granularity of the pulverized coal is 80 percent of minus 200 meshes, wherein the pulverized coal contains 80 percent of carbon, 1.5 percent of sulfur, 14 percent of ash and 5 percent of volatile matter; uniformly mixing lead-antimony-containing copper slag and anthracite according to a weight ratio of 100:3, and loading the mixed materials into a first feeding hopper 4 and a second feeding hopper 8, wherein the first feeding hopper 4 and the second feeding hopper 8 are square hoppers, a first blanking pipe 5 is arranged at the lower part of the first feeding hopper 4, a second blanking pipe 9 is arranged at the lower part of the second feeding hopper 8, a first feeding opening 6 is arranged at the bottom of the first blanking pipe 5, a second feeding opening 10 is arranged at the bottom of the second blanking pipe 9, the first blanking pipe 5 and the second blanking pipe 9 are square, the length is 300mm, the side length is 300mm, a first feeding valve 7 is arranged on the middle section of the first blanking pipe 5, and a second feeding valve 11 is arranged on the middle section of the second blanking pipe 9;
2) a first feeding port 6 and a second feeding port 10 on the top of the oxygen-enriched enhanced reduction furnace 1 are shown in figure 2, materials are added twice, and firstly, a first feeding valve 7 is opened for feeding 2 tons; then opening a second feeding valve 11 to feed 1 ton of materials, wherein the oxygen-enriched concentration in the oxygen-enriched air is 22%, the adding amount of the oxygen-enriched air is that 50m oxygen-enriched air is sprayed into each ton of the granules, the temperature is raised and the granules are melted for 1h, the second feeding is carried out, a first feeding valve 7 is opened to feed 3 tons of materials, and then a second feeding valve 11 is opened to feed 2 tons of materials; spraying oxygen-enriched air with the amount of 100m per ton of the granules to carry out the high temperature cultivation for 2h, and gradually increasing the temperature in the furnace to 900 ℃;
3) four furnace doors 2 are symmetrically arranged on the front side and the rear side of the oxygen-enriched intensified reducing furnace 1, an oxygen inlet 3 is arranged in the middle of each furnace door 2, after the furnace doors 2 of the oxygen-enriched intensified reducing furnace 1 observe that materials in the furnace are completely charged, the temperature in the furnace is controlled at 900 ℃, reduction smelting is carried out for 1h, most of PbO in a molten pool is converted into lead, and lead and antimony generate lead-antimony alloy; cu in the molten bath2S and FeS are mutually melted to generate coarse matte; FeO, CaO in molten pool and SiO in anthracite2Slag forming reaction to form SiO2-FeO-CaO slag system, SiO control2The slag system of-FeO-CaO has the composition of 10% CaO and 30% SiO2And 55% of FeO, wherein the slag type of the furnace slag is a fusion body of iron calcium silicate, has the lowest melting point and the lowest viscosity, and is beneficial to reducing the melting time and reducing the lead content in the slag; high-temperature flue gas is generated by the reaction, and lead in the lead bullion and slag and PbS, Pb or PbO in the generated flue gas are reachedBalancing; simultaneously, high-temperature flue gas is produced by reaction, and is exhausted after being cooled and desulfurized to reach the standard;
4) a molten pool of the oxygen-enriched enhanced reduction furnace 1 forms an inclination angle of 10 degrees with the ground, a lead port 12 is arranged on the left side of the front part of the oxygen-enriched enhanced reduction furnace 1, generated lead-antimony alloy, crude matte and slag of the oxygen-enriched enhanced reduction furnace flow into the rear end part of the oxygen-enriched enhanced reduction furnace 1, soda is added according to the weight of total materials and soda according to the weight ratio of 1000:0.2 for slagging, and slagging is carried out for 0.5 h. Then, slag of the oxygen-enriched intensified reducing furnace is taken out, wherein the slag of the oxygen-enriched intensified reducing furnace contains 1.5% of lead, 0.8% of antimony and 0.6% of copper. Finally, a lead pump is used for pumping the lead-antimony alloy out of an ingot, coarse copper matte on the surface of the lead-antimony alloy is removed and is separately stockpiled, and the lead-antimony alloy contains more than 80% of lead and 15% of antimony; the crude matte contains 20% copper and 25% sulfur.
Example 2
1) The lead-antimony-copper slag contains 70% of lead, 6% of antimony, 6% of copper and 3% of sulfur; the particle size of the pulverized coal is 85% of-200 meshes, wherein the particle size of the pulverized coal contains 85% of carbon, 0.7% of sulfur, 11% of ash and 3.5% of volatile matters, lead-containing antimony copper slag and anthracite are uniformly mixed according to the weight ratio of 100:3, the mixed materials are loaded into a first feeding funnel 4 and a second feeding funnel 8, the first feeding funnel 4 and the second feeding funnel 8 are square funnels, a first discharging pipe 5 is arranged at the lower part of the first feeding funnel 4, a second discharging pipe 9 is arranged at the lower part of the second feeding funnel 8, a first feeding port 6 is arranged at the bottom of the first discharging pipe 5, a second feeding port 10 is arranged at the bottom of the second discharging pipe 9, the first discharging pipe 5 and the second discharging pipe 9 are square, the length is 400mm, the side length is 400mm, a first feeding valve 7 is arranged on the first discharging pipe 5, and a second feeding valve 11 is arranged on the middle section of the;
2) a first feeding port 6 and a second feeding port 10 on the top of the oxygen-enriched enhanced reduction furnace 1 are shown in figure 2, materials are added twice, and firstly, a first feeding valve 7 is opened for feeding 3 tons; then opening a second feeding valve 11 to feed 1.5 tons of materials, wherein the oxygen-enriched concentration in the oxygen-enriched air is 30 percent, the oxygen-enriched air is sprayed into 75m high-speed cultivation oxygen-enriched air for each ton of granular materials, the temperature is raised to melt for 1.5h, the second feeding is carried out, opening a first feeding valve 7 to feed materials and 4 tons of materials, and then opening the second feeding valve 11 to feed materials and 3 tons of materials; spraying oxygen-enriched air with the amount of 150m for each ton of the granules, and gradually increasing the temperature in the furnace to 1000 ℃ after the temperature is increased for 3 hours;
3) four furnace doors 2 are symmetrically arranged on the front side and the rear side of the oxygen-enriched enhanced reduction furnace 1, an oxygen inlet 3 is arranged in the middle of each furnace door 2, oxygen supply is stopped after the furnace doors 2 of the oxygen-enriched enhanced reduction furnace 1 observe that materials in the furnace are completely filled, the temperature in the furnace is controlled at 950 ℃, reduction smelting is carried out for 3 hours, most of PbO in a molten pool is converted into lead, and lead and antimony generate lead-antimony alloy; cu in the molten bath2S and FeS are mutually melted to generate coarse matte; FeO and CaO in the molten pool and SiO2 in the anthracite are subjected to slagging reaction to form a SiO2-FeO-CaO slag system, and SiO2-FeO-CaO slag system is controlled2The slag system of-FeO-CaO has the composition of 20% CaO and 25% SiO2And 50 percent of FeO, the slag type of the furnace slag is a fusion body of iron calcium silicate, has the lowest melting point and the lowest viscosity, and is beneficial to reducing the melting time and reducing the lead content in the slag; high-temperature flue gas is produced by the reaction, and lead in the lead bullion and slag and PbS, Pb or PbO in the generated flue gas reach balance; simultaneously, high-temperature flue gas is produced by reaction, and is exhausted after being cooled and desulfurized to reach the standard;
4) a molten pool of the oxygen-enriched enhanced reduction furnace 1 forms an inclination angle of 10 degrees with the ground, a lead port 12 is arranged on the left side of the front part of the oxygen-enriched enhanced reduction furnace 1, generated lead-antimony alloy, crude matte and slag of the oxygen-enriched enhanced reduction furnace 1 flow into the rear end part of the oxygen-enriched enhanced reduction furnace 1, soda is added according to the weight ratio of 1000:0.35 for slagging, and slagging is carried out for 0.8h, because the specific gravity difference is large, a melt is naturally layered, the alkali slag is lightest, the slag of the oxygen-enriched enhanced reduction furnace is below the alkali slag, matte is below the slag of the oxygen-enriched enhanced reduction furnace, the lead-antimony alloy is heaviest, firstly, the oxygen-enriched enhanced reduction furnace 1 carries out oxygen-enriched enhanced reduction, the alkali slag is 60% alkali-containing slag, 25% arsenic-containing compound and 8% antimony-containing compound, and then the enhanced reduction furnace slag is carried out. Finally, a lead pump is used for pumping the lead-antimony alloy out of an ingot, coarse copper matte on the surface of the lead-antimony alloy is removed and is separately stockpiled, and the lead-antimony alloy contains more than 85% of lead and 10% of antimony; the crude matte contains 30% copper and 20% sulfur.
Example 3
1) The lead-antimony-copper slag contains 80% of lead, 2% of antimony, 2% of copper and 1% of sulfur; 90 percent of pulverized coal with the granularity of-200 meshes, 90 percent of carbon, 0.1 percent of sulfur, 7 percent of ash and 2 percent of volatile matter, evenly mixing lead-antimony-containing copper slag and anthracite according to the weight ratio of 100:3, and loading the mixed materials into a first feeding funnel 4 and a second feeding funnel 8, the first feeding hopper 4 and the second feeding hopper 8 are square hoppers, a first blanking pipe 5 is arranged at the lower part of the first feeding hopper 4, a second blanking pipe 9 is arranged at the lower part of the second feeding hopper 8, a first charging opening 6 is arranged at the bottom of the first blanking pipe 5, a second charging opening 10 is arranged at the bottom of the second blanking pipe 9, the first blanking pipe 5 and the second blanking pipe 9 are square, the length is 500mm, the side length is 400mm, a first feeding valve 7 is arranged at the middle section of the first blanking pipe 5, and a second feeding valve 11 is arranged at the middle section of the second blanking pipe 9;
2) a first feeding port 6 and a second feeding port 10 on the top of the oxygen-enriched enhanced reduction furnace 1 are shown in figure 2, materials are added twice, and firstly, a first feeding valve 7 is opened for feeding 4 tons; then opening a second feeding valve 11 to feed 3 tons of materials, wherein the oxygen-enriched concentration in the oxygen-enriched air is 40 percent, the adding amount of the oxygen-enriched air is that oxygen-enriched air is sprayed into 100m for carrying out the double-row cultivation on each ton of the granules, the temperature is increased to melt for 2 hours, the second feeding is carried out, a first feeding valve 7 is opened to feed 5 tons of materials, and then a second feeding valve 11 is opened to feed 4 tons of materials; spraying oxygen-enriched air with a volume of 200m for each ton of the granules, and gradually increasing the temperature in the furnace to 1100 ℃ after the temperature is increased for 3 hours;
3) four furnace doors 2 are symmetrically arranged on the front side and the rear side of the oxygen-enriched intensified reducing furnace 1, an oxygen inlet 3 is arranged in the middle of each furnace door 2, oxygen supply is stopped after the furnace doors 2 of the oxygen-enriched intensified reducing furnace 1 observe that materials in the furnace are completely filled, the temperature in the furnace is controlled at 1000 ℃, reduction smelting is carried out for 5 hours, most of PbO in a molten pool is converted into lead, and lead and antimony generate lead-antimony alloy; cu in the molten bath2S and FeS are mutually melted to generate coarse matte; FeO, CaO and smokeless in molten poolThe SiO2 in the coal is subjected to slagging reaction to form SiO2The slag system of the-FeO-CaO controls the composition of the slag system of the SiO2-FeO-CaO to be 30 percent of CaO and 20 percent of SiO2And 45 percent of FeO, the slag type of the furnace slag is a fusion body of iron calcium silicate, has the lowest melting point and the lowest viscosity, and is beneficial to reducing the melting time and reducing the lead content in the slag; high-temperature flue gas is produced by the reaction, and lead in the lead bullion and slag and PbS, Pb or PbO in the generated flue gas reach balance; meanwhile, high-temperature flue gas is produced by reaction, and is exhausted after being cooled and desulfurized to reach the standard.
4) The dip angle of 10 degrees is formed between the molten pool of the oxygen-enriched enhanced reduction furnace 1 and the ground, the left side of the front part of the oxygen-enriched enhanced reduction furnace 1 is provided with a lead opening 12, the generated lead-antimony alloy, crude matte and slag of the oxygen-enriched enhanced reduction furnace 1 flow into the rear end part of the oxygen-enriched enhanced reduction furnace 1, soda is added according to the weight of the total materials and soda according to the weight of 1000:0.5 for slagging, and slagging is carried out for 1h, because the specific gravity difference is large, the melt is naturally layered, the caustic sludge is lightest, the slag of the oxygen-enriched enhanced reduction furnace is below the caustic sludge, the matte is below the slag of the oxygen-enriched enhanced reduction furnace, the lead-antimony alloy is heaviest, firstly, the caustic sludge is taken out from the lead opening 12 of the oxygen-enriched enhanced reduction furnace 1, the caustic sludge contains 70% of alkali, 20% of arsenic and compound, 5% of antimony and compound, and then the slag of the oxygen-enriched, removing coarse copper matte on the surface of the lead-antimony alloy, and separately stacking, wherein the lead-antimony alloy contains more than 90% of lead and 5% of antimony; the crude matte contains 40% copper and 15% sulfur.

Claims (5)

1. A method for oxygen-enriched intensified smelting of a horizontal reduction furnace comprises the following steps:
1) uniformly mixing lead-antimony-containing copper slag and anthracite according to the weight ratio of 100: 3-8, wherein a first feeding funnel and a second feeding funnel are arranged at the top of the oxygen-enriched enhanced reduction furnace, the mixed materials are loaded into the first feeding funnel and the second feeding funnel, the first feeding funnel and the second feeding funnel are square funnels, a first discharging pipe is arranged at the lower part of the first feeding funnel, a second discharging pipe is arranged at the lower part of the second feeding funnel, a first feeding valve is arranged at the upper section of the first discharging pipe, a second feeding valve is arranged at the upper section of the second discharging pipe, a first feeding port is arranged at the bottom of the first discharging pipe, a second feeding port is arranged at the bottom of the second discharging pipe, the first discharging pipe and the second discharging pipe are square, the length of the first discharging pipe is 300-plus-500 mm, and the side length of the first discharging pipe is 300;
2) adding materials at the top of the oxygen-enriched enhanced reduction furnace in two steps, wherein the first step is to open a first feeding valve for feeding 2-4 tons, then feeding 1-3 tons from a second feeding funnel, the adding amount of the oxygen-enriched air is that 50-100 m oxygen-enriched air is sprayed into each ton of granular materials, heating and melting are carried out for 1-2 hours, the second step is to feed, the first feeding valve is opened for feeding 3-5 tons, then feeding 2-4 tons from the second feeding funnel, the adding amount of the oxygen-enriched air is that 100-200 m oxygen-enriched air is sprayed into each ton of granular materials, and after the heating is carried out for 2-4 hours, the temperature in the furnace is gradually increased to 900-1100 ℃;
3) four furnace doors are symmetrically arranged on the front side and the rear side of the oxygen enrichment enhanced reduction furnace, an oxygen inlet is arranged in the middle of each furnace door, oxygen supply is stopped after the furnace doors of the oxygen enrichment enhanced reduction furnace observe that materials in the furnace are completely filled, the temperature in the furnace is controlled to be 900-1000 ℃, reduction smelting is carried out for 1-5 hours, most of PbO in a molten pool is converted into lead, lead and antimony generate lead-antimony alloy, and Cu in the molten pool is converted into lead-antimony alloy2S and FeS are mutually melted to generate coarse matte, FeO and CaO in a molten pool and SiO in anthracite2Slag forming reaction to form SiO2-FeO-CaO slag system, SiO control2The slag system of-FeO-CaO comprises 10 to 30 percent of CaO and 20 to 30 percent of SiO2And 40% -60% FeO, the slag type of this slag is the fusion body of silicate of iron calcium, possess the lowest melting point, viscosity is the minimum, help to reduce the smelting time and reduce the slag and contain lead, the reaction produces the high-temperature flue gas, lead in crude lead, slag and PbS in the flue gas produced reach the equilibrium, the reaction produces the high-temperature flue gas at the same time, exhaust after lowering the temperature and desulfurizing up to standard;
4) a molten pool of the oxygen-enriched enhanced reduction furnace forms an inclination angle of 10 degrees with the ground, a lead port is arranged on the left side of the front part of the oxygen-enriched enhanced reduction furnace, generated lead-antimony alloy, crude matte and slag of the oxygen-enriched enhanced reduction furnace flow into the rear end part of the oxygen-enriched enhanced reduction furnace, soda ash is added according to the weight of 1000: 0.2-0.5 to form slag for 0.5-1h, and due to the fact that specific gravity difference is large, a melt is naturally layered, the alkali slag is lightest, the slag of the oxygen-enriched enhanced reduction furnace is below the alkali slag, the matte is below the slag of the oxygen-enriched enhanced reduction furnace, and the lead-antimony alloy is heaviest, firstly, the alkali slag is taken out from the lead port of the oxygen-enriched enhanced reduction furnace, then the slag of the oxygen-enriched enhanced reduction furnace is taken out, finally, the lead-antimony alloy is.
2. The method for oxygen-enriched intensified smelting in the horizontal reduction furnace according to claim 1, characterized in that: the lead-antimony-containing copper slag in the step (1) contains 60-80% of lead, 2-10% of antimony, 2-10% of copper and 1-5% of sulfur.
3. The method for oxygen-enriched intensified smelting in the horizontal reduction furnace according to claim 1, characterized in that: the particle size of the pulverized coal in the step (1) is more than 80% of minus 200 meshes, wherein the pulverized coal contains 80-90% of carbon, 0.1-1.5% of sulfur, 8-15% of ash and 2-5% of volatile matters.
4. The method for oxygen-enriched intensified smelting in the horizontal reduction furnace according to claim 1, characterized in that: the oxygen concentration of the oxygen-enriched air in the step (2) is 22-40%.
5. The method for oxygen-enriched intensified smelting in the horizontal reduction furnace according to any one of claims 1 to 4, characterized by comprising the following steps: the lead-antimony alloy in the step (4) contains more than 80% of lead and 5-19% of antimony, the coarse matte contains 20-40% of copper and 15-25% of sulfur, slag of the oxygen-enriched enhanced reduction furnace contains less than 3% of lead, less than 1% of antimony and less than 1% of copper, the caustic sludge contains 50-70% of alkali, 20-30% of arsenic and compounds and 5-10% of antimony and compounds.
CN201910216984.XA 2019-03-21 2019-03-21 Oxygen-enriched intensified smelting method for horizontal reduction furnace Pending CN111719045A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910216984.XA CN111719045A (en) 2019-03-21 2019-03-21 Oxygen-enriched intensified smelting method for horizontal reduction furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910216984.XA CN111719045A (en) 2019-03-21 2019-03-21 Oxygen-enriched intensified smelting method for horizontal reduction furnace

Publications (1)

Publication Number Publication Date
CN111719045A true CN111719045A (en) 2020-09-29

Family

ID=72562684

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910216984.XA Pending CN111719045A (en) 2019-03-21 2019-03-21 Oxygen-enriched intensified smelting method for horizontal reduction furnace

Country Status (1)

Country Link
CN (1) CN111719045A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009167469A (en) * 2008-01-16 2009-07-30 Sumitomo Metal Mining Co Ltd Method for treating copper-containing dross
CN202177296U (en) * 2011-07-25 2012-03-28 长沙有色冶金设计研究院有限公司 Horizontal type oxygen-enriched bottom-blowing molten pool melting furnace
CN103667738A (en) * 2013-12-31 2014-03-26 个旧市光穆有色金属尾矿废渣综合回收有限公司 Oxygen-enriched side-blowing dual-area bath smelting furnace and method for smelting copper matte by using copper-containing complex material
CN103924094A (en) * 2014-04-16 2014-07-16 济源市万洋冶炼(集团)有限公司 Method for treating copper dross
CN107858516A (en) * 2017-11-07 2018-03-30 广西生富锑业科技股份有限公司 A kind of antimony lead slag oxygen enriched molten bath melting processing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009167469A (en) * 2008-01-16 2009-07-30 Sumitomo Metal Mining Co Ltd Method for treating copper-containing dross
CN202177296U (en) * 2011-07-25 2012-03-28 长沙有色冶金设计研究院有限公司 Horizontal type oxygen-enriched bottom-blowing molten pool melting furnace
CN103667738A (en) * 2013-12-31 2014-03-26 个旧市光穆有色金属尾矿废渣综合回收有限公司 Oxygen-enriched side-blowing dual-area bath smelting furnace and method for smelting copper matte by using copper-containing complex material
CN103924094A (en) * 2014-04-16 2014-07-16 济源市万洋冶炼(集团)有限公司 Method for treating copper dross
CN107858516A (en) * 2017-11-07 2018-03-30 广西生富锑业科技股份有限公司 A kind of antimony lead slag oxygen enriched molten bath melting processing method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
方钊: "《常用有色金属冶炼方法概论》", 31 October 2016 *
曲胜利: "《黄金冶金新技术》", 31 July 2018 *

Similar Documents

Publication Publication Date Title
CN106367605B (en) A kind of production method of side-blown dilution copper smelting slag
CN101165196B (en) Technique for continuously smelting copper by employing oxygen bottom converter and device thereof
CN102618729B (en) Smelting method and device for molten oxidized lead slag
CN112593093B (en) Nickel smelting device and nickel smelting method
CN101871725B (en) Horizontal bottom blowing type molten pool desulphurizing furnace and oxidative desulphurization method for leaded materials
CN105177314B (en) A kind of bath smelting of material containing antimony oxide produces the device of needle antimony
CN102374781B (en) Direct lead-smelting comprehensive metallurgical device and smelting process
CN101328543A (en) Oxygen bottom blowing continuous copper smelting apparatus
CN104498731B (en) A kind of method and apparatus of the solid sulfur melting of oxygen-enriched side-blowing low-temperature alkali
CN102304623B (en) Method and equipment for reducing impoverishment of copper converting slag
CN103725896A (en) Copper-nickel sulfide ore concentrate smelting method through pyrometallurgy
CN101328547A (en) Converting process of bottom blowing converting furnace continuous copper smelting
CN104032147A (en) Oxygen-rich side-blowing molten pool copper and sulfonium melting production technology and three-side blown melting furnace
CN101328545A (en) Process of oxygen bottom blowing continuous copper smelting
CN104946899B (en) Edge transmission top-blown converter and depleted sedimentation furnace combined lead dross treatment method
CN102031393A (en) Continuous lead smelting clean production process
CN101328544A (en) Bottom blowing converting furnace for bottom blowing continuous copper smelting
CN109022799B (en) Integrated continuous two-section type anode slime smelting device and smelting process thereof
CN106086281A (en) The ironmaking of a kind of flash and the integrated apparatus of coal gas and method
CN107858516A (en) A kind of antimony lead slag oxygen enriched molten bath melting processing method
CN112391507B (en) Improved flash smelting reduction iron-making device and method
CN101768672A (en) Top-blown bath antimony smelting method and bath smelting furnace
CN111719045A (en) Oxygen-enriched intensified smelting method for horizontal reduction furnace
CN102925709A (en) Method for melting solid frozen slag layer by using melting furnace
CN107630140B (en) A kind of process of oxygen-enriched air blast furnace processing lead antimony anode mud

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20200929