CN219363753U - Smelting device for removing copper by reducing high lead slag - Google Patents
Smelting device for removing copper by reducing high lead slag Download PDFInfo
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- CN219363753U CN219363753U CN202320353383.5U CN202320353383U CN219363753U CN 219363753 U CN219363753 U CN 219363753U CN 202320353383 U CN202320353383 U CN 202320353383U CN 219363753 U CN219363753 U CN 219363753U
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- 239000010949 copper Substances 0.000 title claims abstract description 156
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 155
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 152
- 239000002893 slag Substances 0.000 title claims abstract description 67
- 238000003723 Smelting Methods 0.000 title claims abstract description 63
- 230000009467 reduction Effects 0.000 claims abstract description 103
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003546 flue gas Substances 0.000 claims abstract description 30
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 238000002485 combustion reaction Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000005192 partition Methods 0.000 claims abstract description 10
- 239000000428 dust Substances 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 239000002918 waste heat Substances 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 14
- 238000005265 energy consumption Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 9
- 238000006722 reduction reaction Methods 0.000 description 84
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 230000004907 flux Effects 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 238000005507 spraying Methods 0.000 description 5
- 239000000779 smoke Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 239000011028 pyrite Substances 0.000 description 3
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical group [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 3
- 229910052683 pyrite Inorganic materials 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
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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
- 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
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model provides a smelting device for removing copper by reducing high lead slag, which comprises a smelting device main body, a reduction zone and a copper removal zone, wherein the reduction zone and the copper removal zone are arranged in the smelting device main body; the reduction zone and the copper removal zone are separated by a partition wall, and a gap is reserved between the bottom of the partition wall and the bottom of the reduction zone, so that a lead liquid channel is formed between the reduction zone and the lower part of the copper removal zone; a material inlet and a first flue gas outlet are arranged at the top of the reduction zone, a slag hole is arranged at the end side of the reduction zone, and a reducing agent injection device is arranged on the side wall of the reduction zone; the top of the copper removal zone is provided with a combustion device and a second flue gas outlet, the side wall of the copper removal zone is respectively provided with a vulcanizing agent feed inlet and a copper matte port, and the bottom of a molten pool of the copper removal zone is lower than the bottom of a reduction molten pool. The utility model can solve the problems of large equipment quantity, long process flow, high capital investment, long lead transportation and smelting period, increased energy consumption and the like in the prior art.
Description
Technical Field
The utility model relates to the technical field of metallurgy, in particular to a smelting device for reducing and removing copper from high lead slag.
Background
The main smelting process flow of lead is sulphide ore oxidation smelting, liquid high lead slag direct reduction, crude lead preliminary fire refining and crude lead electrolytic refining. At present, the most advanced high lead slag reduction copper removal process adopted in the production enterprises is that the high lead slag produced by a smelting furnace enters a reduction furnace to undergo a reduction reaction, and crude lead is produced. Crude lead directly flows into a copper-removing lead pot or a continuous copper-removing furnace through a chute for primary fire refining, and impurity elements such as copper, arsenic, antimony, tin and the like are removed.
In the existing process, the reduction of high lead slag and the copper removal of crude lead are two independent working sections, and the combined production of a reduction furnace and a lead melting pot (or a continuous decoppering furnace) is required, so that the problems of large equipment quantity, long process flow and high capital investment exist. The lead bullion is transported and pulled for a long smelting period and increases energy consumption.
Disclosure of Invention
In view of the above problems, the utility model aims to provide a smelting device for reducing and removing copper from high lead slag, which solves the problems of large equipment quantity, long process flow, high capital investment, long lead transportation and smelting period, increased energy consumption and the like in the prior art.
The utility model provides a smelting device for removing copper by reducing high lead slag, which comprises a smelting device main body, a reduction zone and a copper removal zone, wherein the reduction zone and the copper removal zone are arranged in the smelting device main body; the reduction zone and the copper removal zone are separated by a partition wall, and a gap is reserved between the bottom of the partition wall and the bottom of the reduction zone, so that a lead liquid channel is formed between the reduction zone and the lower part of the copper removal zone; a reduction molten pool is arranged at the lower part of the reduction zone, a material inlet and a first flue gas outlet are arranged at the top of the reduction zone, a slag hole is arranged at the end side of the reduction zone, and a reducing agent injection device is arranged on the side wall of the furnace body of the reduction zone; the reducing agent injection device is connected with the reducing agent storage and conveying device; a copper removal molten pool is arranged at the lower part of the copper removal zone, a combustion device and a second flue gas outlet are arranged at the top of the copper removal zone, a vulcanizing agent feed inlet and a copper matte port are respectively arranged on the side wall of the copper removal zone, and the position of the copper matte port is lower than that of the vulcanizing agent feed inlet; a siphon lead outlet is formed in the end side of the copper removal area, and a cooling device is arranged at the bottom of the copper removal molten pool; the bottom of the decoppering bath is lower than the bottom of the reduction bath.
Furthermore, it is preferable that the reducing agent injection device includes a spray gun; a plurality of spray guns are arranged on each side of the side wall of the reduction zone, and the distances between adjacent spray guns are equal.
Furthermore, it is preferred that the combustion device comprises at least two burners; the combustion device comprises at least two burners; the burner is arranged at the top of the furnace body of the copper removal area. Furthermore, it is preferable that the top of the reduction zone is higher than the top of the copper removal zone.
Furthermore, it is preferable that the bottom of the copper removal bath is 1500mm to 1800mm lower than the elevation of the bottom of the reduction bath.
Furthermore, it is preferable that the reduction region has the same width as the copper removal region.
In addition, preferably, the cooling device is a cooling water pipe.
Furthermore, preferably, the main body of the smelting device is a metallurgical furnace.
In addition, the preferable scheme is that the first flue gas outlet is connected with a flue gas waste heat recovery system; a flue gas outlet of the flue gas waste heat recovery system is connected with a dust collection system; a dust outlet of the dust collection system is connected with a granulating device; the grain outlet of the granulating device is connected with the material adding port.
Furthermore, preferably, the copper matte port is connected with a lead matte treatment system.
According to the smelting device for reducing and removing copper from high lead slag, provided by the utility model, the reduction area and the copper removal area are arranged in the smelting device main body, and the high lead slag reduction and the crude lead copper removal can be simultaneously completed through one smelting device, so that the high lead slag reduction working section and the crude lead copper removal working section are combined into one working section, and the equipment quantity and the construction investment are reduced; the lead bullion is prevented from being transferred between the high lead slag reduction working section and the lead bullion copper removal working section, the smelting flow is shortened, and the energy consumption is reduced; copper elements in the lead bullion are removed in a lead matte form, so that the lead bullion meeting the component requirements of the anode plate can be directly produced; the lead matte can be directly sent to a copper converting furnace, so that the recovery efficiency of copper elements in crude lead is improved, and the energy consumption for recovering copper elements is reduced.
Drawings
Other objects and attainments together with a more complete understanding of the utility model will become apparent and appreciated by referring to the following description taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic structural view of a smelting device for reducing and removing copper from high lead slag according to an embodiment of the utility model;
FIG. 2 is a flow chart of a process for reducing and removing copper from high lead slag by using the smelting device for reducing and removing copper from high lead slag in the embodiment of the utility model;
fig. 3 is a flowchart of a method for reducing and removing copper from high lead slag by using the smelting device for reducing and removing copper from high lead slag according to the embodiment of the utility model.
In the drawing, a 1-smelting device main body, a 2-reduction zone, a 21-reduction molten pool, a 22-material feeding port, a 23-first flue gas outlet, a 24-slag port, a 25-reducing agent injection device, a 3-copper removal zone, a 31-copper removal molten pool, a 32-combustion device, a 33-second flue gas outlet, a 34-vulcanizing agent feeding port, a 35-copper matte port, a 36-siphon lead outlet, a 37-cooling device, a 4-partition wall and a 5-lead liquid channel.
The same reference numerals will be used throughout the drawings to refer to similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details.
Aiming at the problems of large equipment quantity, long process flow, high capital investment, long lead delivery and smelting period, increased energy consumption and the like in the prior art, a smelting device for reducing and removing copper from high lead slag and a reduction and copper removal method are provided.
Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
In order to illustrate the smelting device and the method for reducing and removing copper from high lead slag, provided by the utility model, fig. 1 shows the structure of the smelting device for reducing and removing copper from high lead slag according to an embodiment of the utility model; FIG. 2 shows a process flow of high lead slag reduction decoppering using the smelting device for high lead slag reduction decoppering of the embodiment of the utility model; fig. 3 shows a flow of a method for reducing and removing copper from high lead slag by using the smelting device for reducing and removing copper from high lead slag in the embodiment of the utility model.
As shown in fig. 1 to 3 together, the smelting device for reducing and removing copper from high lead slag provided by the utility model comprises a smelting device main body 1, a reduction zone 2 and a copper removal zone 3, wherein the reduction zone 2 and the copper removal zone 3 are arranged in the smelting device main body 1; wherein, the reduction zone 2 and the copper removal zone 3 are separated by a partition wall 4, and a gap is reserved between the bottom of the partition wall 4 and the bottom of the reduction zone 2, so that a lead liquid channel 5 is formed between the reduction zone 2 and the lower part of the copper removal zone 3; a reduction molten pool 21 is arranged at the lower part of the reduction zone 2, a material inlet 22 and a first flue gas outlet 23 are arranged at the top of the reduction zone 2, a slag hole 24 is arranged at the end side of the reduction zone 2, and a reducing agent injection device 25 is arranged on the side wall of the furnace body of the reduction zone 2; a copper removal molten pool 31 is arranged at the lower part of the copper removal zone 3, a combustion device 32 and a second flue gas outlet 33 are arranged at the top of the copper removal zone 3, a vulcanizing agent feed port 34 and a copper matte port 35 are respectively arranged on the side wall of the copper removal zone 3, and the position of the copper matte port 35 is lower than that of the vulcanizing agent feed port 34; a siphon lead outlet 36 is arranged at the end side of the copper removal area 3, and a cooling device 37 is arranged at the bottom of the copper removal molten pool 31; the bottom of the copper removal bath 31 is lower than the bottom of the reduction bath 21.
The reduction zone 2 and the copper removal zone 3 are arranged in the smelting device main body 1, so that high lead slag reduction and crude lead copper removal can be completed simultaneously by one smelting device, and the high lead slag reduction working section and the crude lead copper removal working section are combined into one working section, thereby reducing the equipment quantity and the construction investment; the lead bullion is prevented from being transferred between the high lead slag reduction working section and the lead bullion copper removal working section, the smelting flow is shortened, and the energy consumption is reduced; copper elements in the lead bullion are removed in a lead matte form, so that the lead bullion meeting the component requirements of the anode plate can be directly produced; the lead matte can be directly sent to a copper converting furnace, so that the recovery efficiency of copper elements in crude lead is improved, and the energy consumption for recovering copper elements is reduced.
As a preferred embodiment of the present utility model, the reducing agent injection device 25 is connected to a reducing agent storage and delivery device. Oxygen-enriched air and pulverized coal can be sprayed into the reduction zone 2 to perform fusion reduction on the high-lead slag.
As a preferred embodiment of the present utility model, the reducing agent injection device 25 includes a spray gun; a plurality of spray guns are arranged on each side of the side wall of the reduction zone 2, and the distances between adjacent spray guns are equal. By arranging a plurality of spray guns on the side wall of the reduction zone 2, the reduction zone 2 is heated more uniformly, and the heating effect inside the reduction zone 2 is ensured.
As a preferred embodiment of the present utility model, the combustion apparatus 32 comprises at least two burners; the burner is arranged at the top of the furnace body of the copper removal zone 3. The burner heats the upper part of the copper removal bath 31 and cooperates with the cooling device 37 to form a temperature gradient for the lead bullion liquid in the copper removal bath 31 so that the lead matte produced is deposited above the level of the lead bullion liquid.
As a preferred embodiment of the utility model, the top of the reduction zone 2 is higher than the top of the copper removal zone 3.
The reaction occurring in the reduction zone 2 is severe, so that the top of the reduction zone 2 is set higher in order to prevent the foaming slag from being generated from rushing to the top, while the reaction in the copper removal zone 3 is not severe, and generally, it is required to stand still, and in order to make the combustion device 32 better heat the upper part of the crude lead liquid in the copper removal molten pool 31, the top height is set lower.
As a preferred embodiment of the utility model, the bottom of the copper removal bath 31 is 1500mm to 1800mm lower than the elevation of the bottom of the reduction bath 21. Since the lead bullion solution needs to be heated up and cooled down in the copper removal bath 31 to form a temperature gradient, the bottom of the copper removal bath 31 needs to be lower than the bottom of the reduction bath 21. Preferably, the bottom of the decoppering bath 31 is 1500mm to 1800mm lower than the elevation of the bottom of the reduction bath 21.
As a preferred embodiment of the present utility model, the reduction zone 21 is the same width as the copper removal zone 31. The same width facilitates the provision of the partition walls 4.
As a preferred embodiment of the present utility model, the cooling device 37 is a cooling water pipe; and/or the smelting device body 1 is a metallurgical furnace. The cooling water pipe cools the bottom of the decoppering bath 31 by circulating water so as to form a temperature gradient to the lead bullion liquid inside. The main body 1 of the smelting device is a common lead smelting device for a metallurgical furnace.
As a preferred embodiment of the present utility model, the first flue gas outlet 23 is connected with a flue gas waste heat recovery system; a flue gas outlet of the flue gas waste heat recovery system is connected with a dust collection system; the dust outlet of the dust collection system is connected with a granulating device; the pellet outlet of the pellet mill is connected to the material inlet 22. Through the structural design, the smoke dust generated in the reduction zone 2 can be recycled
As a preferred embodiment of the utility model, a copper matte port 35 is connected to a lead matte treatment system. The lead matte flows out of the copper matte port 35 and enters a lead matte treatment system for further extraction of copper elements.
The smelting device for reducing and removing copper from the high lead slag provided by the embodiment of the utility model is utilized to carry out reduction and copper removal treatment on the high lead slag; the method comprises the following steps:
s1, adding flux particles and high lead slag obtained after granulating a flux through a granulator into a reduction zone 2 from a material adding inlet 22, spraying oxygen-enriched air and pulverized coal into the reduction zone 2 through a reducing agent spraying device 25, so that the high lead slag in the reduction zone 2 undergoes a reduction reaction, obtaining lead bullion liquid and reduction slag in a reduction molten pool 21, discharging the reduction slag from a slag hole 24, and enabling the lead bullion liquid to flow into a molten pool 31 of a copper removal zone from the molten pool 21 of the reduction zone through a lead solution channel 5;
s2, adding a vulcanizing agent into the crude lead liquid in the copper removal molten pool 31 through a vulcanizing agent feeding hole 34, heating the upper part of the copper removal area 3 through a combustion device 32, and cooling the crude lead liquid through a cooling device 37 to form a temperature gradient on the upper part and the lower part of the copper removal molten pool 31 so as to enable the generated lead matte to be precipitated above the liquid level of the crude lead liquid, and respectively obtaining copper removal lead below the liquid level and lead matte above the liquid level in the copper removal area 3;
and S3, discharging the decoppered lead and the lead matte from the siphon lead outlet 36 and the copper matte outlet 35 respectively.
Lead bullion meeting the component requirements of the anode plate can be directly produced, copper elements are separated from the lead bullion in the form of lead matte, the lead smelting period is shortened, the copper recovery process is shortened, and the energy consumption is reduced.
Wherein, in step S1, during the reduction reaction of the high lead slag in the reduction zone 2, the generated reduction flue gas is discharged from the first flue gas outlet 23; the reduced flue gas is subjected to waste heat recovery treatment and dust removal purification treatment in sequence to obtain flue gas and smoke dust; the flue gas is sent into a flue gas desulfurization system for desulfurization treatment and then discharged, and the flue gas is taken as circulating flue gas in a reduction zone and is granulated together with a flux by a granulator to obtain flux granules.
Wherein the flux is any one of limestone, quartz stone and iron flux or a plurality of fluxes mixed according to any proportion; and/or the addition amount of the flux is such that FeO/SiO 2 1.2; to make CaO/SiO 2 0.6.
Wherein the oxygen concentration of the oxygen-enriched air is 50% -80%; and/or the reducing agent is pulverized coal or natural gas; and/or the injection pressure of the oxygen-enriched air and the reducing agent is 150 kPa-300 kPa.
Wherein the internal temperature of the copper removal area 3 is 1200-1300 ℃; the bottom temperature of the decoppering bath 31 is 350-450 ℃.
Wherein the vulcanizing agent is pyrite or pyrite; the addition amount of the vulcanizing agent is that the ratio of the sulfur element to the copper element in the crude lead liquid is 1:2.
wherein the copper content in the copper-removing lead is less than 0.06%.
In order to better illustrate the smelting device for reducing and removing copper from high lead slag, which is provided by the utility model, the following specific examples are provided.
Example 1
60t high lead slag (high lead slag contains 45 percent of lead, 8 to 10 percent of zinc, 2 to 3 percent of copper and 1.5 to 2 percent of antimony)
The solvent granules of the solvent and the circulating smoke dust are added into the reduction zone 2 of the main body 1 of the smelting device from a smoke outlet, and the granularity of the solvent granules is 5-10 mm from the material adding inlet 22 to the reduction zone 2.
Reducing agent and oxygen are sprayed into the reduction zone pool 21 through a spray gun, the spraying pressure of the reducing agent is 150-300 kPa, and the spraying pressure of the oxygen is 150-300 kPa. The blowing amount of the reducing agent is 8-10 t/h, and the oxygen flow is 5000Nm 3 /h～6000Nm 3 And/h. The temperature of the reduction process is kept around 1200 ℃. The reduction process produces lead bullion and reducing slag. The reduction reaction is carried out for 60-100 min, and the reducing slag is discharged from the slag hole 24. The reduction zone bath 21 is in communication with a copper removal bath 31, and the reduction zone produces lead bullion which flows to the copper removal zone. About 300kg of pyrite powder and 100kg of sulfur powder are added into the lower part of the decoppering bath 31 by spraying with a pneumatic conveying device. The burner at the top of the copper removal zone 3 continuously heats the liquid level of the molten pool, and the surface temperature of the molten pool is kept at 1100-1200 ℃. The cooling water pipe at the bottom of the copper removal zone continuously absorbs heat to cool the bottom of the furnace, so that the temperature of a molten pool at the lower part of the copper removal zone is kept at 350-450 ℃. And carrying out liquation copper removal and sulphuration copper removal reactions on crude lead in the copper removal molten pool, and floating copper elements and copper sulfide of the crude lead to the surface of the molten pool to generate lead matte (Cu 50%, pb 10%, fe 10% and S18%). Lead matte is discharged from copper matte port 35 and sent to a lead matte treatment system. And (3) discharging the copper from the siphon port after the copper content of the crude lead is reduced to below 0.06%, and conveying the copper to an anode plate ingot casting section.
According to the smelting device for reducing and removing copper from high lead slag, provided by the utility model, the reduction area and the copper removal area are arranged in the smelting device main body, and the high lead slag reduction and the crude lead copper removal can be simultaneously completed through one smelting device, so that the high lead slag reduction working section and the crude lead copper removal working section are combined into one working section, and the equipment quantity and the construction investment are reduced; the lead bullion is prevented from being transferred between the high lead slag reduction working section and the lead bullion copper removal working section, the smelting flow is shortened, and the energy consumption is reduced; copper elements in the lead bullion are removed in a lead matte form, so that the lead bullion meeting the component requirements of the anode plate can be directly produced; the lead matte can be directly sent to a copper converting furnace, so that the recovery efficiency of copper elements in crude lead is improved, and the energy consumption for recovering copper elements is reduced.
The smelting plant for the reduction decoppering of high lead slag according to the present utility model is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the high lead slag reduction decoppering smelting apparatus set forth above without departing from the teachings of the present utility model. Accordingly, the scope of the utility model should be determined from the following claims.
Claims (10)
1. The smelting device for reducing and removing copper from high lead slag is characterized by comprising a smelting device main body, a reduction zone and a copper removal zone, wherein the reduction zone and the copper removal zone are arranged in the smelting device main body; wherein,,
the reduction zone and the copper removal zone are separated by a partition wall, and a gap is reserved between the bottom of the partition wall and the bottom of the reduction zone, so that a lead liquid channel is formed between the reduction zone and the lower part of the copper removal zone;
a reduction molten pool is arranged at the lower part of the reduction zone, a material inlet and a first flue gas outlet are arranged at the top of the reduction zone, a slag hole is arranged at the end side of the reduction zone, and a reducing agent injection device is arranged on the side wall of the furnace body of the reduction zone; the reducing agent injection device is connected with the reducing agent storage and conveying device;
a copper removal molten pool is arranged at the lower part of the copper removal zone, a combustion device and a second flue gas outlet are arranged at the top of the copper removal zone, a vulcanizing agent feed inlet and a copper matte port are respectively arranged on the side wall of the copper removal zone, and the position of the copper matte port is lower than that of the vulcanizing agent feed inlet; a siphon lead outlet is formed in the end side of the copper removal area, and a cooling device is arranged at the bottom of the copper removal molten pool;
the bottom of the decoppering bath is lower than the bottom of the reduction bath.
2. The smelting device for reducing and removing copper from high lead slag according to claim 1, wherein,
the reducing agent injection device comprises a spray gun;
a plurality of spray guns are arranged on each side of the side wall of the reduction zone, and the distances between the adjacent spray guns are equal.
3. The smelting device for reducing and removing copper from high lead slag according to claim 1, wherein,
the combustion device comprises at least two burners; the burner is arranged at the top of the furnace body of the copper removal area.
4. The smelting device for reducing and removing copper from high lead slag according to claim 1, wherein,
the top of the reduction zone is higher than the top of the copper removal zone.
5. The smelting device for reducing and removing copper from high lead slag according to claim 1, wherein,
the bottom of the copper removal molten pool is 1500 mm-1800 mm lower than the elevation of the bottom of the reduction molten pool.
6. The high lead slag reduction decoppering smelting device as recited in claim 1, characterized in that the reduction zone is the same width as the decoppering zone.
7. The smelting device for reducing and removing copper from high lead slag as defined in claim 1, wherein the cooling device is a cooling water pipe.
8. The smelting device for reducing and removing copper from high lead slag as defined in claim 1, wherein the main body of the smelting device is a metallurgical furnace.
9. The smelting device for reducing and removing copper from high lead slag according to claim 1, wherein the first flue gas outlet is connected with a flue gas waste heat recovery system;
a flue gas outlet of the flue gas waste heat recovery system is connected with a dust collection system;
a dust outlet of the dust collection system is connected with a granulating device;
the grain outlet of the granulating device is connected with the material adding port.
10. The smelting device for reducing and removing copper from high lead slag according to claim 1, wherein the copper matte port is connected with a lead matte treatment system.
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| CN202320353383.5U CN219363753U (en) | 2023-02-20 | 2023-02-20 | Smelting device for removing copper by reducing high lead slag |
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