CN113355531A - Production method for directly smelting brass raw material into copper anode plate - Google Patents
Production method for directly smelting brass raw material into copper anode plate Download PDFInfo
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- CN113355531A CN113355531A CN202110591549.2A CN202110591549A CN113355531A CN 113355531 A CN113355531 A CN 113355531A CN 202110591549 A CN202110591549 A CN 202110591549A CN 113355531 A CN113355531 A CN 113355531A
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- 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
- C22B15/003—Bath smelting or converting
- C22B15/0041—Bath smelting or converting in converters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
- B22D25/04—Casting metal electric battery plates or the like
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- 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
- C22B15/0056—Scrap treating
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
- C22B7/003—Dry processes only remelting, e.g. of chips, borings, turnings; apparatus used therefor
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- 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
- C22B7/02—Working-up flue dust
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- 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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a production method for directly smelting brass raw materials into a copper anode plate. Before the raw material of the regenerated brass is added for the first time, pouring copper liquid into an anode furnace, then directly adding the raw material of the regenerated brass for heating and melting, keeping a certain temperature in the anode furnace in the melting process, starting a reduction spray gun which is filled with natural gas or coal gas to reduce zinc oxide generated in the melting process, and stopping feeding when the molten copper is enough for one furnace; then carrying out oxidation, slagging and reduction reactions on the obtained copper liquid in sequence, wherein the copper content in the copper liquid obtained after the reduction reaction is more than 99 percent, casting the copper liquid into an anode plate, and taking the residual copper liquid as a cosolvent to enter the next furnace for melting reaction; the flue gas generated in the reaction process is subjected to dust collection by a bag dust collector, and the generated flue dust is sent to a zinc smelting system to produce electrolytic zinc, zinc sulfate or nano zinc oxide. The production method of the invention has the advantages of low investment, low energy consumption, low cost and the like.
Description
The technical field is as follows:
the invention belongs to the technical field of copper smelting, and particularly relates to a production method for directly smelting a brass raw material into a copper anode plate.
Secondly, background art:
brass is an important metal material and is widely used. In the process of producing and using brass products, a large amount of regenerated brass raw materials are generated, and because brass contains high zinc, when the zinc content is high for a copper refinery, zinc is oxidized to generate zinc oxide in the melting process, so that the melting point is increased, and when the regenerated copper raw materials are purchased, brass is not generally purchased. The regenerated brass raw materials comprise brass leftover materials, brass leftover wires, brass tubes, brass parts, brass scraps, brass blocks and the like. At present, two methods for extracting copper and zinc from brass are mainly used, namely a wet process and a fire process, wherein the wet process adopts a leaching method to enable copper and zinc to enter a leaching solution, then an extraction method is adopted to separate the copper and the zinc in the leaching solution, and then distribution recovery is carried out.
In the prior art of pyrogenic processes, for example: the invention patent application CN201310060085.8 discloses a method for extracting pure copper and pure zinc from brass, which comprises the steps of adding raw materials into a closed smelting furnace through a feeding pipeline with a screw rod for smelting, performing nitrogen stamping on an outlet of a feeding hole and the smelting furnace through a nitrogen channel in the screw rod, cooling zinc steam produced by smelting through a cooling device to recover zinc powder, and discharging copper liquid from the bottom of the furnace to recover copper.
In the existing brass processing process of the wet process, in order to ensure the leaching effect, raw materials are required to be crushed and ground into powder, and as the regenerated brass raw materials mainly exist in blocks, wires, pipes, leftover materials, scraps and the like, most of the wires, leftover materials and the like are packed and purchased in a ton ingot form when being purchased in particular, the power consumption is large in the crushing and grinding processes, and the cost for processing waste water is generated at the same time; for example: the invention patent application CN201310060085.8 discloses a method for extracting pure copper and pure zinc from brass, which can directly recover copper and zinc, but because of the need of feeding via a feed pipe with a screw, the regenerated brass raw material cannot be directly fed in the form of blocks, wires, tubes, etc., but still needs to be crushed, etc.
Thirdly, the invention content:
the technical problem to be solved by the invention is as follows: according to the problems in the prior art, the invention provides a production method for directly smelting a regenerated brass raw material into a copper anode plate. The production method has the advantages of convenient operation, low investment, low energy consumption, low cost and the like.
In order to solve the problems, the invention adopts the technical scheme that:
the invention provides a production method for directly smelting brass raw materials into a copper anode plate, which comprises the following steps:
1) starting nitrogen in the anode furnace ventilating device and a burner, and pouring 5-20 t of copper liquid into the furnace through copper cladding when the temperature in the anode furnace reaches 1200-1280 ℃;
2) then, 3-5 t of the regenerated brass raw material is added into an anode furnace by a hopper, a reduction spray gun is started, and the natural gas or coal gas introduction amount in the reduction spray gun is 10-100 m3H; then the furnace body is rotated to enable the reduction spray gun to contact the copper liquid for heating and melting; in the process of melting the brass, the temperature in the furnace is kept at 1120-1280 ℃ by the heat of a burner, the furnace is rotated to a feeding position after the brass is completely melted, then 5-8 t of regenerated brass raw material is added, the furnace body is continuously rotated, a reduction spray gun is contacted with the copper liquid level, the adding amount of the regenerated brass raw material is gradually increased by 2t each time along with the increase of the depth of the molten liquid, and the furnace is reached when the total amount of the copper liquid is 160t, 300t or 450t, and the feeding of the regenerated brass raw material is stopped;
3) then, switching natural gas or coal gas in the reduction spray gun into compressed air for oxidation, adding quartz accounting for 0.5-2% of the total weight of the raw materials of the regenerated brass for slagging and lead-removing reaction when the copper sample is oxidized into brick red (the brick red copper sample has a smooth surface and is slightly sunken, and the section of the brick red copper sample has no sulfur wires), and rotating the furnace body for slagging after the reaction is carried out for 20-40 min;
4) after slag discharge is finished, switching compressed air of the spray gun into natural gas or coal gas for reduction reaction, and after the copper sample is reduced into a columnar crystal with smooth and uniform surface patterns and compact section, finishing reduction;
5) after the reduction reaction is finished, casting the copper liquid with the copper content of more than 99% into a copper anode plate, stopping casting when 10-50 t of the copper liquid is remained in the casting process, and entering the next furnace for melting reaction;
6) collecting dust in the flue gas generated in the reaction process by a cloth bag dust collector; the generated smoke dust is sent to a zinc smelting system to produce electrolytic zinc, zinc sulfate or nano zinc oxide.
According to the production method for directly smelting the brass raw material into the copper anode plate, the copper liquid poured in the step 1) is the copper liquid containing more than 95% of copper directly smelted from copper concentrate, or the copper liquid containing more than 95% of copper and less than 1% of zinc obtained by melting copper alloy.
According to the production method for directly smelting the brass raw material into the copper anode plate, in the step 2), the regenerated brass raw material is at least one of brass leftover materials, brass leftover wires, brass tubes, brass parts, brass scraps and brass blocks.
According to the production method for directly smelting the brass raw material into the copper anode plate, in the step 2), natural gas or coal gas introduced through an oxidation-reduction spray gun is used for reducing zinc oxide oxidized in the melting process in the brass melting process.
According to the production method for directly smelting brass raw materials into the copper anode plate, in the step 3), natural gas or coal gas is switched into compressed air for oxidation, and the introduction amount of the compressed air is 150-300 m3And h, controlling the temperature to be 1120-1200 ℃ in the oxidation reaction process.
According to the production method for directly smelting the brass raw material into the copper anode plate, in the step 4), the compressed air of the spray gun is switched into natural gas or coal gas for reduction reaction, and the introduction amount of the natural gas or the coal gas is 100-250 m3The temperature in the reduction reaction process is 1180-1240 ℃, and the reaction time is 0.5-1.5 h.
According to the production method for directly smelting the brass raw material into the copper anode plate, in the step 5), the casting is stopped when 10-50 t of copper liquid is left, and the copper liquid is used as a cosolvent to enter the next furnace for melting reaction.
The invention has the following positive beneficial effects:
1. the technical scheme of the invention can directly process by utilizing the original equipment of the copper smelting plant, thereby saving investment.
2. The technical scheme of the invention utilizes the air brick device of the anode furnace to stir, so that the materials are quickly subjected to heat transfer and mass transfer, thereby accelerating the reaction and saving energy.
3. The technical scheme of the invention utilizes the anode furnace oxidation-reduction spray gun to directly reduce the zinc oxide generated by oxidation, has high dezincification speed, not only ensures dezincification effect, but also saves time and reduces energy consumption.
4. According to the technical scheme, the brass is melted by using the copper liquid, so that the melting is fast, and the energy is saved.
5. The technical scheme of the invention can treat brass blocks, wires, pipes, leftover materials and the like without crushing and grinding, thereby reducing equipment investment and saving electric charge.
6. The invention adopts the pyrogenic process equipment for treatment, and no wastewater is generated.
In conclusion, the invention has obvious economic benefit and social benefit.
Fourthly, the specific implementation mode:
the invention is further illustrated by the following examples, which do not limit the scope of the invention.
Example 1:
the invention relates to a production method for directly smelting brass raw materials into a copper anode plate, which comprises the following detailed steps:
1) starting nitrogen in the anode furnace ventilating device, starting a burner, and pouring 10t of copper liquid (the copper liquid is copper liquid containing more than 95% of copper directly smelted by copper concentrate) into the anode furnace through copper cladding when the temperature in the anode furnace reaches 1200 ℃;
2) then, 3t of brass blocks and brass scraps are added into an anode furnace by adopting a hopper, a reduction spray gun is started, and the natural gas introduction amount in the reduction spray gun is 10m3H; then the furnace body is rotated to make the reduction spray gun contact with the copper liquid for heating and melting, and the natural gas is introducedReducing zinc oxide generated in the melting process by gas; in the process of melting brass, the temperature in the furnace is kept at 1120-1280 ℃ by the heat of a burner, the furnace is rotated to a feeding position after the brass is completely melted, then 5t of brass blocks and brass scraps are added, the furnace body is continuously rotated, a reduction spray gun is contacted with the copper liquid level, the adding amount of the regenerated brass raw material is gradually increased by 2t each time along with the increase of the depth of the molten liquid, and when the total amount of the copper liquid is 160t, the furnace is reached, and the adding of the regenerated brass raw material is stopped;
3) then the natural gas in the reduction spray gun is switched into compressed air for oxidation, and the input quantity of the compressed air is 180m3The temperature in the oxidation reaction process is controlled to be 1120-1150 ℃; when a copper sample is oxidized into brick red (the surface of the brick red copper sample is flat and slightly concave, and the section of the brick red copper sample has no sulfur wires), adding quartz accounting for 1 percent of the total weight of the regenerated brass raw materials (brass blocks and brass scraps) for slagging and lead removal reaction, and rotating a furnace body for slagging after the reaction is carried out for 20 min;
4) after the slag discharge is finished, the compressed air of the spray gun is switched into natural gas for reduction reaction, and the introduction amount of the natural gas is 150m3The temperature in the reduction reaction process is 1180-1240 ℃, and the reaction time is 1.0 h; after the copper sample is reduced into a columnar crystal with a smooth surface, fine and uniform patterns and a compact section, finishing the reduction;
5) after the reduction reaction is finished, casting the copper liquid with the copper content of more than 99% into a copper anode plate, stopping casting when the copper liquid is remained for 10t in the casting process, and taking the remained copper liquid as a cosolvent to enter the next furnace for melting reaction;
6) collecting dust in the flue gas generated in the reaction process by a cloth bag dust collector; the generated smoke dust is sent to a zinc smelting system to produce electrolytic zinc, zinc sulfate or nano zinc oxide.
Example 2:
the invention relates to a production method for directly smelting brass raw materials into a copper anode plate, which comprises the following detailed steps:
1) starting nitrogen in the anode furnace ventilating device, starting a burner, and pouring 10t of copper liquid (the copper liquid is copper liquid containing more than 95% of copper directly smelted by copper concentrate) into the anode furnace through copper cladding when the temperature in the anode furnace reaches 1200 ℃;
2) then, 3t of brass blocks and brass scraps are added into an anode furnace by adopting a hopper, a reduction spray gun is started, and the introduction amount of natural gas in the reduction spray gun is 20m3H; then the furnace body is rotated to enable the reduction spray gun to contact the copper liquid for heating and melting, and the introduced natural gas reduces and melts the zinc oxide generated in the process; in the process of melting brass, the temperature in the furnace is kept at 1120-1280 ℃ by the heat of a burner, the furnace is rotated to a feeding position after the brass is completely melted, then a brass block and brass chips of 6t are added, the furnace body is continuously rotated, a reduction spray gun is contacted with the copper liquid level, the adding amount of the regenerated brass raw material is gradually increased by 2t each time along with the increase of the depth of the molten liquid, and when the total amount of the copper liquid is 160t, the furnace is reached, and the adding of the regenerated brass raw material is stopped;
3) then the natural gas in the reduction spray gun is switched into compressed air for oxidation, and the input amount of the compressed air is 200m3The temperature in the oxidation reaction process is controlled to be 1140-1180 ℃; when the copper sample is oxidized into brick red (the surface of the brick red copper sample is flat and slightly concave, and the section of the brick red copper sample has no sulfur wires), adding quartz accounting for 1.5 percent of the total weight of the regenerated brass raw materials (brass blocks and brass scraps) for slagging and lead removal reaction, and rotating the furnace body for slagging after the reaction is carried out for 30 min;
4) after the slag discharge is finished, the compressed air of the spray gun is switched into natural gas for reduction reaction, and the introduction amount of the natural gas is 120m3The temperature in the reduction reaction process is 1180-1240 ℃, and the reaction time is 1.2 h; after the copper sample is reduced into a columnar crystal with a smooth surface, fine and uniform patterns and a compact section, finishing the reduction;
5) after the reduction reaction is finished, casting the copper liquid with the copper content of more than 99% into a copper anode plate, stopping casting when the copper liquid is remained for 10t in the casting process, and taking the remained copper liquid as a cosolvent to enter the next furnace for melting reaction;
6) collecting dust in the flue gas generated in the reaction process by a cloth bag dust collector; the generated smoke dust is sent to a zinc smelting system to produce electrolytic zinc, zinc sulfate or nano zinc oxide.
Example 3:
the invention relates to a production method for directly smelting brass raw materials into a copper anode plate, which comprises the following detailed steps:
1) starting nitrogen in the anode furnace ventilating device, starting a burner, and pouring 15t of copper liquid (the copper liquid is copper liquid containing more than 95% of copper directly smelted by copper concentrate) into the anode furnace through copper cladding when the temperature in the anode furnace reaches 1200 ℃;
2) then, 5t of brass blocks, brass chips and brass leftover materials are added into an anode furnace by adopting a hopper, a reduction spray gun is started, and the natural gas introducing amount in the reduction spray gun is 50m3H; then the furnace body is rotated to enable the reduction spray gun to contact the copper liquid for heating and melting, and the introduced natural gas reduces and melts the zinc oxide generated in the process; in the process of melting brass, the temperature in the furnace is kept at 1120-1280 ℃ by the heat of a burner, the furnace is rotated to a feeding position after the brass is completely melted, then 7t of brass blocks, brass scraps and brass scraps are added, the furnace body is continuously rotated, a reduction spray gun is contacted with the copper liquid level, the adding amount of the regenerated brass raw material is gradually increased by 2t each time along with the increase of the depth of the molten liquid, and the furnace is reached when the total amount of the copper liquid is 160t, and the adding of the regenerated brass raw material is stopped;
3) then the natural gas in the reduction spray gun is switched into compressed air for oxidation, and the input quantity of the compressed air is 150m3The temperature in the oxidation reaction process is controlled to be 1120-1150 ℃; when a copper sample is oxidized into brick red (the surface of the brick red copper sample is smooth and slightly sunken, and the section of the brick red copper sample has no sulfur wires), adding quartz accounting for 1 percent of the total weight of the regenerated brass raw materials (brass blocks, brass scraps and brass leftover materials) to carry out slagging and lead removal reaction, and rotating a furnace body to carry out slagging after 40min of reaction;
4) after the slag discharge is finished, the compressed air of the spray gun is switched into natural gas for reduction reaction, and the introduction amount of the natural gas is 100m3The temperature in the reduction reaction process is 1180-1240 ℃, and the reaction time is 1.5 h; after the copper sample is reduced into a columnar crystal with a smooth surface, fine and uniform patterns and a compact section, finishing the reduction;
5) after the reduction reaction is finished, casting the copper liquid with the copper content of more than 99% into a copper anode plate, stopping casting when the copper liquid is remained for 10t in the casting process, and taking the remained copper liquid as a cosolvent to enter the next furnace for melting reaction;
6) collecting dust in the flue gas generated in the reaction process by a cloth bag dust collector; the generated smoke dust is sent to a zinc smelting system to produce electrolytic zinc, zinc sulfate or nano zinc oxide.
Example 4:
the invention relates to a production method for directly smelting brass raw materials into a copper anode plate, which comprises the following detailed steps:
1) starting nitrogen in the anode furnace ventilating device, starting a burner, and pouring 20t of copper liquid (the copper liquid is copper liquid containing more than 95% of copper directly smelted by copper concentrate) into the anode furnace through copper cladding when the temperature in the anode furnace reaches 1230 ℃;
2) then, 5t of brass blocks, brass chips and brass leftover materials are added into an anode furnace by adopting a hopper, a reduction spray gun is started, and the natural gas introducing amount in the reduction spray gun is 50m3H; then the furnace body is rotated to enable the reduction spray gun to contact the copper liquid for heating and melting, and the introduced natural gas reduces and melts the zinc oxide generated in the process; in the process of melting brass, the temperature in the furnace is kept at 1120-1280 ℃ by the heat of a burner, the furnace is rotated to a feeding position after the brass is completely melted, then 8t of brass blocks, brass scraps and brass scraps are added, the furnace body is continuously rotated, a reduction spray gun is contacted with the copper liquid level, the adding amount of the regenerated brass raw material is gradually increased by 2t each time along with the increase of the depth of the molten liquid, and when the total amount of the copper liquid is 300t, the furnace is reached, and the adding of the regenerated brass raw material is stopped;
3) then the natural gas in the reduction spray gun is switched into compressed air for oxidation, and the input amount of the compressed air is 250m3The temperature in the oxidation reaction process is controlled to be 1120-1180 ℃; when a copper sample is oxidized into brick red (the surface of the brick red copper sample is smooth and slightly sunken, and the section of the brick red copper sample has no sulfur wires), adding quartz accounting for 1 percent of the total weight of the regenerated brass raw materials (brass blocks, brass scraps and brass leftover materials) to carry out slagging and lead removal reaction, and rotating a furnace body to carry out slagging after 30min of reaction;
4) after the slag discharge is finished, the compressed air of the spray gun is switched into natural gas for reduction reaction, and the introduction amount of the natural gas is 200m3H, the temperature during the reduction reaction is 11The reaction time is 1.5h at the temperature of 80-1240 ℃; after the copper sample is reduced into a columnar crystal with a smooth surface, fine and uniform patterns and a compact section, finishing the reduction;
5) after the reduction reaction is finished, casting the copper liquid with the copper content of more than 99% into a copper anode plate, stopping casting when the copper liquid is remained for 30t in the casting process, and taking the remained copper liquid as a cosolvent to enter the next furnace for melting reaction;
6) collecting dust in the flue gas generated in the reaction process by a cloth bag dust collector; the generated smoke dust is sent to a zinc smelting system to produce electrolytic zinc, zinc sulfate or nano zinc oxide.
Example 5:
the invention relates to a production method for directly smelting brass raw materials into a copper anode plate, which comprises the following detailed steps:
1) starting nitrogen in the anode furnace ventilating device, starting a burner, and pouring 20t of copper liquid (the copper liquid is copper liquid containing more than 95% of copper directly smelted by copper concentrate) into the anode furnace through copper cladding when the temperature in the anode furnace reaches 1280 ℃;
2) then, 5t of brass blocks, brass scraps and brass leftover materials are added into an anode furnace by adopting a hopper, a reduction spray gun is started, and the natural gas introduction amount in the reduction spray gun is 100m3H; then the furnace body is rotated to enable the reduction spray gun to contact the copper liquid for heating and melting, and the introduced natural gas reduces and melts the zinc oxide generated in the process; in the process of melting brass, the temperature in the furnace is kept at 1120-1280 ℃ by the heat of a burner, the furnace is rotated to a feeding position after the brass is completely melted, then 8t of brass blocks, brass scraps and brass scraps are added, the furnace body is continuously rotated, a reduction spray gun is contacted with the copper liquid level, the adding amount of the regenerated brass raw material is gradually increased by 2t each time along with the increase of the depth of the molten liquid, and when the total amount of the copper liquid is 450t, the furnace is reached, and the adding of the regenerated brass raw material is stopped;
3) then the natural gas in the reduction spray gun is switched into compressed air for oxidation, and the input amount of the compressed air is 300m3The temperature in the oxidation reaction process is controlled to be 1140-1200 ℃; when the copper sample is oxidized into brick red (the brick red copper sample has a smooth and slightly concave surface and no sulfur wire on the section), addingCarrying out slagging and lead removal reaction on quartz accounting for 2 percent of the total weight of raw brass raw materials (brass blocks, brass scraps and brass leftover materials), and rotating a furnace body for slagging after 30min of reaction;
4) after the slag discharging is finished, the compressed air of the spray gun is switched into natural gas for reduction reaction, and the introduction amount of the natural gas is 250m3The temperature in the reduction reaction process is 1180-1240 ℃, and the reaction time is 1.5 h; after the copper sample is reduced into a columnar crystal with a smooth surface, fine and uniform patterns and a compact section, finishing the reduction;
5) after the reduction reaction is finished, casting the copper liquid with the copper content of more than 99% into a copper anode plate, stopping casting when the copper liquid is remained for 50t in the casting process, and taking the remained copper liquid as a cosolvent to enter the next furnace for melting reaction;
6) collecting dust in the flue gas generated in the reaction process by a cloth bag dust collector; the generated smoke dust is sent to a zinc smelting system to produce electrolytic zinc, zinc sulfate or nano zinc oxide.
Claims (7)
1. A production method for directly smelting brass raw materials into a copper anode plate is characterized by comprising the following steps:
1) starting nitrogen in the anode furnace ventilating device and a burner, and pouring 5-20 t of copper liquid into the furnace through copper cladding when the temperature in the anode furnace reaches 1200-1280 ℃;
2) then, 3-5 t of the regenerated brass raw material is added into an anode furnace by a hopper, a reduction spray gun is started, and the natural gas or coal gas introduction amount in the reduction spray gun is 10-100 m3H; then the furnace body is rotated to enable the reduction spray gun to contact the copper liquid for heating and melting; in the process of melting the brass, the temperature in the furnace is kept at 1120-1280 ℃ by the heat of a burner, the furnace is rotated to a feeding position after the brass is completely melted, then 5-8 t of regenerated brass raw material is added, the furnace body is continuously rotated, a reduction spray gun is contacted with the copper liquid level, the adding amount of the regenerated brass raw material is gradually increased by 2t each time along with the increase of the depth of the molten liquid, and the furnace is reached when the total amount of the copper liquid is 160t, 300t or 450t, and the feeding of the regenerated brass raw material is stopped;
3) then, switching natural gas or coal gas in the reduction spray gun into compressed air for oxidation, adding quartz accounting for 0.5-2% of the total weight of the raw materials of the regenerated brass for slagging and lead removal reaction when the copper sample is oxidized into brick red, and rotating the furnace body for slagging after the reaction is carried out for 20-40 min;
4) after slag discharge is finished, switching compressed air of the spray gun into natural gas or coal gas for reduction reaction, and after the copper sample is reduced into a columnar crystal with smooth and uniform surface patterns and compact section, finishing reduction;
5) after the reduction reaction is finished, casting the copper liquid with the copper content of more than 99% into a copper anode plate, stopping casting when 10-50 t of the copper liquid is remained in the casting process, and entering the next furnace for melting reaction;
6) collecting dust in the flue gas generated in the reaction process by a cloth bag dust collector; the generated smoke dust is sent to a zinc smelting system to produce electrolytic zinc, zinc sulfate or nano zinc oxide.
2. The production method for directly smelting the brass raw material into the copper anode plate according to claim 1, is characterized in that: the copper liquid poured in the step 1) is copper liquid containing more than 95% of copper directly smelted from copper concentrate, or copper liquid containing more than 95% of copper and less than 1% of zinc obtained by melting copper alloy.
3. The production method for directly smelting the brass raw material into the copper anode plate according to claim 1, is characterized in that: the raw material of the regenerated brass in the step 2) is at least one of brass leftover materials, brass leftover wires, brass tubes, brass parts, brass scraps and brass blocks.
4. The production method for directly smelting the brass raw material into the copper anode plate according to claim 1, is characterized in that: and 2) in the brass melting process, reducing the oxidized zinc oxide in the melting process by introducing natural gas or coal gas through an oxidation-reduction spray gun.
5. The production method for directly smelting the brass raw material into the copper anode plate according to claim 1, is characterized in that:in the oxidation process of switching the natural gas or coal gas into the compressed air in the step 3), the introduction amount of the compressed air is 150-300 m3And h, controlling the temperature to be 1120-1200 ℃ in the oxidation reaction process.
6. The production method for directly smelting the brass raw material into the copper anode plate according to claim 1, is characterized in that: in the step 4), in the process of switching the compressed air of the spray gun into natural gas or coal gas for reduction reaction, the introduction amount of the natural gas or the coal gas is 100-250 m3The temperature in the reduction reaction process is 1180-1240 ℃, and the reaction time is 0.5-1.5 h.
7. The production method for directly smelting the brass raw material into the copper anode plate according to claim 1, is characterized in that: and 5) stopping casting when 10-50 t of copper liquid remains, and taking the copper liquid as a cosolvent to enter the next furnace for melting reaction.
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