CN113174491A - Copper slag dilution-side top composite converting and reducing integrated furnace - Google Patents

Copper slag dilution-side top composite converting and reducing integrated furnace Download PDF

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Publication number
CN113174491A
CN113174491A CN202110467877.1A CN202110467877A CN113174491A CN 113174491 A CN113174491 A CN 113174491A CN 202110467877 A CN202110467877 A CN 202110467877A CN 113174491 A CN113174491 A CN 113174491A
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China
Prior art keywords
furnace body
dilution
slag
reduction
copper
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CN202110467877.1A
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Inventor
张廷安
豆志河
吕国志
郭军华
刘燕
张子木
赫冀成
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Dongda Nonferrous Solid Waste Technology Research Institute Liaoning Co ltd
Northeastern University China
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Dongda Nonferrous Solid Waste Technology Research Institute Liaoning Co ltd
Northeastern University China
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Priority to CN202110467877.1A priority Critical patent/CN113174491A/en
Publication of CN113174491A publication Critical patent/CN113174491A/en
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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
    • C22B7/04—Working-up slag
    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/0054—Slag, slime, speiss, or dross treating
    • 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
    • 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
    • C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
    • C22B9/103—Methods of introduction of solid or liquid refining or fluxing agents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat

Abstract

The invention relates to the field of comprehensive utilization of copper slag, in particular to a copper slag dilution-side top composite converting and reducing integrated furnace. The copper slag dilution-side top composite converting and reducing integrated furnace is integrated equipment with a dilution system and a reducing system which are connected in series, and the furnace body is a horizontal furnace body and comprises a dilution area of the furnace body and a reducing area of the furnace body. The lean agent is added into a lean area of the furnace body through a lean agent feeding port, and a lean reaction is completed under the action of vortex stirring, in the reaction process, a fuel spray gun blows oxygen-enriched fuel into the furnace body, and the oxygen-enriched fuel burns to release heat to provide heat for the melt and maintain the reaction temperature; after the depleted slag enters the reduction zone, the slag former is added from a slag former feed opening, oxygen-enriched fuel is blown in by a top-blowing spray gun, and the reducing agent is carried by oxygen-enriched air and sprayed in by a side spray gun. The invention provides a dilution-side top combined converting and reducing integrated furnace for copper slag, which can realize the high-efficiency recovery of valuable components of copper and iron in the copper slag, the high-valued slagging-free 100% utilization of the copper slag and the synergistic utilization of the waste heat of the copper slag.

Description

Copper slag dilution-side top composite converting and reducing integrated furnace
Technical Field
The invention relates to the field of comprehensive utilization of copper slag, in particular to a copper slag dilution-side top composite converting and reducing integrated furnace.
Technical Field
Copper smelting is an important byproduct in the copper pyrometallurgical process, and contains considerable amounts of valuable metal resources such as Cu, Fe, Ni and the like. Modern oxygen-enriched blowing enhances the smelting strength of copper and simultaneously brings about the sharp increase of the residual copper in smelting slag, so the modern copper smelting process carries out dilution and copper recovery treatment on the copper slag. Two types of industrial methods for diluting and recovering copper slag are available: slow cooling ore dressing and fire dilution smelting. But the recovery rate of copper is far from reaching the industrial requirement at present. In principle, the beneficiation method can only recover most of the mixed matte, and the slag slow cooling beneficiation method comprises the following steps: the slow cooling within the phase transition temperature (1080 ℃) can lead copper mineral particles to grow up, and ensures the good trapping of copper in the flotation process. The copper content of the tailings obtained by mineral separation is below 0.35 percent, and currently, the copper content of the tailings can be controlled to be about 0.2 percent by a few enterprises. However, the iron-containing tailings of the ore dressing after the copper is recovered by the ore dressing cannot be utilized, and only can be stockpiled for treatment, so that great secondary pollution is caused. The theoretical fire smelting method can reduce the copper content in the slag to the slag-matte balance level. The hot slag is directly subjected to electric heating depletion, the copper-containing slag is placed into a depletion furnace for sedimentation and slag matte separation and reduction, and the copper content of the slag is generally below 0.4%. But the vulcanizing agent in the pyrogenic process dilution process is seriously volatilized and seriously pollutes the environment, the vulcanizing agent floats on the surface of the molten slag and is difficult to be fully contacted with a molten slag pool, and the utilization rate of the vulcanizing agent is low. In the existing fire-method depletion process, the residual content of copper in the depleted slag is about 0.5 percent, and the recovery rate of copper is low.
For the development of copper slag depletion and reduction devices, domestic related scientific research personnel carry out a great deal of research work, such as the invention of Zhangwei' a device and method for continuously depleting copper smelting slag, application number: 201811300235.7 ", comprising two parts, the first part being a slag buffer process and the second part being a slag flow depletion process. Directly introducing high-temperature molten copper slag from a copper smelting furnace into a buffer device, and heating the buffer device again to ensure that the buffer device has good fluidity; then is introduced into a groove type lean device; the content of copper and other useful metals in the slag is controlled by adjusting the electric field strength, the feed temperature and the slag residence time.
' A copper dross treatment system and method of the invention in Peltier et al, application Ser. No.: 201711173309.0' comprises a copper slag green pellet preparation system, a drying device, a charging system, a reduction melting device and a discharging device which are connected in sequence. The reduction and melting device realizes the processes of reduction, melting, separation, clarification and the like of the copper slag green pellets in one device.
Although the above patent can also realize the process of dilution or reduction of copper slag, the treatment process is longer and the heat utilization rate is lower.
Disclosure of Invention
The invention provides a dilution-side top combined converting and reducing integrated furnace for copper slag, which can realize the high-efficiency recovery of valuable components of copper and iron in the copper slag, the high-valued slagging-free 100% utilization of the copper slag and the synergistic utilization of the waste heat of the copper slag.
The copper slag dilution-side top composite converting and reducing integrated furnace is integrated equipment with a dilution system and a reducing system which are connected in series, and the furnace body is a horizontal furnace body and comprises a dilution area of the furnace body and a reducing area of the furnace body. And a retaining wall is arranged between the furnace body depletion area and the furnace body reduction area, the top of the retaining wall is connected with the top of the furnace body, the bottom of the retaining wall is connected with the bottom of the furnace body, a channel is arranged in the middle of the retaining wall, and the depletion slag in the furnace body depletion area can pass through the channel through overflow and enter the furnace body reduction area.
The dilution system comprises a furnace body dilution zone, a molten copper slag feed inlet, a fuel injection system, a leaner feed inlet, a dilution zone flue gas outlet and a copper matte outlet, wherein the fuel injection system is a fuel spray gun arranged on the side surface of the furnace body dilution zone; molten copper slag is added into a depletion area of a furnace body from a molten copper slag feed port, a depletion agent is added into the depletion area of the furnace body through a depletion agent feed port, depletion reaction is completed under the action of vortex stirring, a fuel spray gun injects oxygen-enriched fuel into the furnace body in the reaction process, the oxygen-enriched fuel burns and releases heat to provide heat for a melt to maintain the reaction temperature, meanwhile, the melt can be stirred to form vortex through injection, the vortex action can also be enhanced under the stirring action of a stirring paddle, depletion reaction generates matte and depletion slag, the matte is on the lower layer of the melt, the depletion slag is on the upper layer, the matte on the lower layer is discharged through a copper matte outlet and returns to a copper smelting process, and the depletion slag on the upper layer overflows through a passage on a retaining wall and enters a reduction area of the furnace body. Depleted of SO formed by the reaction2Is discharged through the lean zone flue gas outlet.
Preferably, the dilution system further comprises a mechanical eddy current stirring device of the dilution zone, wherein the mechanical eddy current stirring device is driven by a motor and can further stir the melt to form eddy current, and the eddy current effect is enhanced. The mechanical stirring paddle can adjust the height up and down, and is positioned at the interface of a copper slag layer and a depleted slag layer of a depleted zone molten pool when a depleted reaction is carried out.
The reduction system comprises a furnace body reduction area, a slagging agent feeding port, a reduction area flue gas outlet, an oxygen-enriched blowing system, a slag outlet and a molten iron outlet, wherein the oxygen-enriched blowing system comprises a top-blowing spray gun arranged at the top of the furnace body reduction area and a side-blowing spray gun arranged at the side part of the furnace body reduction area. After the depleted slag enters the reduction zone, adding a slagging agent from a slagging agent feed inlet, and blowing oxygen-enriched fuel into a top-blowing spray gun; the reducing agent is carried by the oxygen-enriched air and is sprayed in through a side spray gun, or the side spray gun only sprays the oxygen-enriched air, and the reducing agent is also added through a slag former feeding port; or the reducing agent and the slagging agent are both injected through a side spray gun. The oxygen-enriched air blowing from the top can supplement heat to the reduction zone molten pool, and the air flow sprayed from the side or the air flow carrying the reducing agent can beThe melt is agitated to accelerate the reduction efficiency. And the copper-containing molten iron and the reducing slag are generated through reduction reaction, the upper layer of reducing slag is discharged from a slag outlet, and the lower layer of copper-containing molten iron is discharged from a molten iron outlet. Containing CO2The tail gas is discharged from a flue gas outlet of the reduction zone.
Preferably, the reduction system further comprises a mechanical eddy stirring device in the reduction zone, similar to the mechanical eddy stirring device in the depletion zone, and a mechanical stirring paddle driven by a motor can further stir the melt to form eddy. The height of the mechanical stirring paddle can be adjusted up and down, and the mechanical stirring paddle is positioned at a slag-metal interface of a reduction zone molten pool when a reduction reaction is carried out.
The copper slag dilution-side top composite converting and reducing integrated furnace mainly comprises the following components and functions:
(1) the fuel injection system is a fuel injection lance on the side (preferably both sides) of the body of the depletion zone for injecting oxygen-enriched fuel into the body of the furnace. The sprayed oxygen-enriched fuel has three functions, wherein the oxygen-enriched fuel has one function of burning and releasing heat, providing heat for a depletion zone melting pool and maintaining the depletion reaction temperature; secondly, the oxygen-enriched fuel has reducibility and can participate in depletion reaction to reduce the copper content in the copper slag; thirdly, the oxygen-enriched fuel sprayed from the side can stir the melt, improve the dynamic conditions of internal mass transfer, heat transfer and the like, and strengthen the dilution reaction process.
(2) And in the dilution zone, a mechanical stirring paddle is inserted into the interface of the copper slag layer and the dilution slag layer when dilution reaction is carried out, the stirring paddle is driven by a motor, and the rotating speed is controlled within the range of 50 rpm-300 rpm. The mechanical stirring can quickly absorb the barren agent into the melt, so as to prevent the barren agent from volatilizing at a high temperature. In addition, the method can greatly optimize the kinetic conditions of the depletion process, shorten the depletion reaction time and improve the performance of the reactor.
(3) The method is characterized in that a retaining wall is adopted to divide a copper slag depletion-side top combined converting and reducing integrated furnace into a depletion area and a reducing area, and depletion slag generated in the depletion area flows into the reducing area through the retaining wall in an overflow mode. The retaining wall is characterized in that: the retaining wall is arranged between the dilution zone and the reduction zone, the top of the retaining wall is connected with the top of the furnace body, and the bottom of the retaining wall is connected with the bottom of the furnace body.
(4) The mechanical stirring device in the reduction zone is positioned at a slag-metal interface when the reduction reaction is carried out, and the slag former and the reducing agent are quickly involved and dispersed through vortex stirring, so that the reduction efficiency is accelerated, and the rotating speed of the stirring paddle is within the range of 50-300 rpm.
(5) A top-blowing spray gun and a side-blowing spray gun of the reduction system are respectively positioned at the top end and the side part of the reduction zone furnace body, the top-blowing spray gun blows oxygen-enriched fuel, CO gas generated in the reduction process is fully combusted, and heat supplement is carried out on a molten pool; CO produced2The tail gas is discharged from a flue gas outlet of the reduction zone and is subjected to subsequent treatment; the side-blown spray gun sprays reducing agents carried by oxygen-enriched air, such as coal, natural gas, coke and the like, so as to reduce the copper slag in the molten pool and maintain the reduction temperature.
The operation steps of the copper slag dilution-side top composite converting and reducing integrated furnace are as follows: adding molten copper slag into a depletion region from a molten copper slag feed port, blowing in an oxygen-enriched fuel blowing mode through a fuel spray gun to perform heat preservation or proper heat compensation on a depletion region molten pool, and keeping the temperature of the depletion region molten pool at 1250-1350 ℃. The barren agent is added from a barren agent charging opening, and is quickly sucked into the molten copper slag by a vortex formed by side spray gun blowing or mechanical stirring, a series of barren reactions are completed, and matte obtained by barren reaction is discharged and recovered from a copper matte outlet. The dilution area and the reduction area are divided by a retaining wall, dilution slag overflows into the reduction area through a channel of the retaining wall, and slagging agent is added through a slagging agent charging port. In the reduction area, the reducing agent is carried by oxygen-enriched carrier gas and is sprayed in through a side spray gun, or the side spray gun only sprays oxygen-enriched air, and the reducing agent is also added through a slag former feeding port. And simultaneously, the top oxygen-enriched blowing supplements heat to a reduction zone molten pool, the temperature of the reduction zone molten pool is kept at 1450-1550 ℃, reduction reaction is carried out under the action of mechanical stirring, copper-containing molten iron and reduction slag are obtained after reduction, and the copper-containing molten iron and the reduction slag are discharged through a molten iron outlet and a slag outlet respectively.
Compared with the traditional method for the depletion furnace and the reduction furnace, the method has the following technical advantages and innovations:
1. the device realizes the integration of the dilution process of the copper slag and the reduction process of the copper slag, and reduces the equipment investment.
2. The device realizes the continuous operation of the depletion process of the copper slag and the reduction process of the copper slag, and fully utilizes the waste heat of the depleted slag.
3. The reduction area of the equipment adopts oxygen-enriched fuel to carry out top blowing heat supplementation, fully burns CO gas and reduces the reduction energy consumption.
4. The efficient addition of the reducing agent, the depleting agent and the slagging agent is realized by vortex stirring, and the efficient dispersion distribution of the materials in the copper slag melt can be greatly strengthened by mechanical vortex stirring, so that the depletion and reduction efficiency of the copper slag is improved.
5. And the efficient recycling of valuable components such as copper, iron, lead, zinc and the like in the copper slag is ensured in the eddy dilution and reduction process.
Description of the drawings:
FIG. 1 is a schematic diagram of a copper slag depletion-side top combined converting and reducing integrated furnace in an embodiment of the invention.
Reference numerals: 1-melting a copper slag feed inlet; 2-a feeding port of the lean agent; 3-a fuel lance; 4-mechanical stirring paddles in the depletion zone; 5-a depletion zone flue gas outlet; 6-upper retaining wall; 7-a slag former feed inlet; 8-top-blown spray gun; 9-mechanical stirring paddle in reduction zone; 10-a reduction zone flue gas outlet; 11-a slag outlet; 12-molten iron outlet; 13-side-blown spray gun; 14-lower retaining wall; 15-copper matte outlet.
Detailed Description
The copper slag adopted by the embodiment of the invention comprises the following main components: t isFe 42.47％，FeO 43.14％，Cu 4.51％，Zn 5.67％，S 1.55％，Al2O3 3.02％，CaO 0.96％，MgO 1.09％，SiO2 20.82％，Au 1.2g/t，As 0.075％。
The oxygen-enriched fuel adopted by the embodiment of the invention is a mixture of pulverized coal and oxygen-enriched air, wherein the pulverized coal comprises the following main components: 69.17% of fixed carbon, 11.13% of ash and 19.42% of volatile components.
The barretter FeS adopted in the embodiment of the invention2The main components of the composition are as follows: FeS297% and the balance being mainly SiO2。
The reducing agent coke adopted by the embodiment of the invention comprises the following main components: fixed carbon 80.17%, the rest components are ash and volatile matter.
The production content of the invention is not limited to the use of such raw materials, e.g. the use of FeS as the depleting agent2Pyrite and the like can be adopted as well; the reducing agent can be coke, natural gas or hydrogen, and the slag-forming agent can be CaO or CaF2And carbide slag, and the like.
The invention is described in detail below with reference to fig. 1 and examples.
As shown in fig. 1, the copper slag dilution-side top combined converting and reducing integrated furnace used in the present embodiment is a horizontal furnace body including a furnace body dilution zone and a furnace body reduction zone. And a retaining wall is arranged between the furnace body depletion area and the furnace body reduction area, the top of the retaining wall (namely, an upper retaining wall 6) is connected with the top of the furnace body, the bottom of the retaining wall (namely, a lower retaining wall 14) is connected with the bottom of the furnace body, a channel is arranged in the middle of the retaining wall, and the depletion slag in the furnace body depletion area can pass through the overflow through channel and enter the furnace body reduction area.
The impoverishment system of the copper slag impoverishment-side top composite converting and reducing integrated furnace comprises a furnace body impoverishment area, a molten copper slag feed inlet 1, a fuel spray gun 3, a impoverishment agent feed inlet 2, an impoverishment area flue gas outlet 5, an impoverishment area mechanical stirring paddle 4 and a copper matte outlet 15. The molten copper slag feed inlet 1 is arranged above the end part of one end of the impoverishment area of the furnace body, the impoverishment agent feed inlet 2 and the impoverishment area flue gas outlet 5 are arranged at the top of the impoverishment area of the furnace body, the mechanical stirring paddle 4 of the impoverishment area is arranged inside the impoverishment area of the furnace body, and the copper matte outlet 15 is arranged at the lower part of the impoverishment area of the furnace body.
The reduction system of the copper slag dilution-side top composite converting and reducing integrated furnace comprises a furnace body reduction area, a slag former feed inlet 7 and a reduction area smoke outlet 10 which are arranged at the top of the furnace body reduction area, an oxygen-enriched blowing system, a slag outlet 11 and a molten iron outlet 12 which are arranged at one end part of the furnace body reduction area, and a reduction area mechanical stirring paddle 9 in the furnace body reduction area, wherein the oxygen-enriched blowing system comprises a top-blowing spray gun 8 arranged at the top of the furnace body reduction area and a side-blowing spray gun 13 arranged at the side part of the furnace body reduction area.
The operation steps of using the copper slag dilution-side top composite converting and reducing integrated furnace to perform copper slag dilution and reduction are as follows:
(1) will be in a hot stateThe copper slag is added into a dilution area through a molten copper slag feed port 1, and the temperature of the copper slag is ensured to be more than or equal to 1250 ℃. FeS2Is fed into the depletion zone through a depletion agent feed port 2. Then oxygen-enriched air with oxygen content of 50% and oxygen-enriched fuel consisting of pulverized coal are blown laterally by a fuel spray gun to initiate combustion reaction to form a high-temperature molten pool for supplying heat for the dilution process of copper slag, and the temperature of the melt is ensured to be more than or equal to 1250 ℃;
(2) inserting a depletion region mechanical stirring paddle 4 into the interface of a copper slag layer and a depletion slag layer in a high-temperature molten pool, starting stirring, continuously adding hot copper slag and a depletion agent into the high-temperature molten pool formed in the depletion region of the reduction integrated furnace, and stirring the high-temperature melt by the depletion region mechanical stirring paddle 4 to form a vortex with a stable structure and a high-temperature melt with a stable height.
(3) As the dilution process is carried out, the formed matte is discharged from the copper matte outlet 15, and the depleted slag flows into the reduction zone of the furnace body through the retaining wall in an overflow mode.
(4) Adding excessive coke and slagging agent into a slagging agent feed inlet 7 of a reduction zone of a furnace body, blowing oxygen-enriched air with oxygen content of 50 percent and oxygen-enriched fuel consisting of pulverized coal into the furnace body through a top-blowing spray gun 8, and blowing oxygen-enriched air with oxygen content of more than 50 percent into a side-blowing spray gun 13; or the slag former is added from a slag former feed inlet 7, the oxygen-enriched fuel is blown in by the top-blowing spray gun 8, and the reducing agents such as coke or natural gas carried by the oxygen-enriched air are sprayed in by the side-blowing spray gun 13; or the reducing agent and the slagging agent are sprayed into the oxygen-enriched air through the side-blowing spray gun 13 to be carried into the slag. The reducing agent initiates the reduction reaction of the reducing material, CO gas generated in the full combustion reduction process of the oxygen-enriched air provides heat for the molten pool, and the temperature of the melt is ensured to be more than or equal to 1450 ℃.
(5) And inserting a reduction zone stirring paddle into a slag-metal interface in a high-temperature molten pool of the reduction zone, starting stirring, and carrying out reduction reaction on the melt under a stable vortex.
(6) Along with the continuous progress of the reduction reaction, the formed bottom molten iron layer is discharged into a connected molten iron buffer tank through a molten iron outlet 12 at the lower part of the reduction zone under the siphoning action through a high-temperature resistant closed pipeline, and is discharged into a molten iron ladle through an overflow port in an overflowing way; the formed upper reduction slag layer is continuously discharged into a slow cooling slag ladle through a slag outlet 11 at the upper part of a molten iron outlet 12.
(7) And starting a tail gas waste heat collecting and purifying system after the start of the furnace, and discharging the smelting tail gas discharged from the dilution zone flue gas outlet 5 and the reduction zone flue gas outlet 10 into the atmosphere after waste heat recovery and purification treatment.
Example 1
The copper slag is adopted, wherein the FeS2The addition amount of the copper slag is 8 percent of the mass of the copper slag. The constant-temperature dilution time is 35min, wherein the rotation speed of a mechanical stirring paddle 4 in the dilution zone is controlled at 110 rpm; adding excessive 50% of coke and calcium oxide into a reduction zone, wherein the stirring speed of the reduction zone is 100rpm, the reduction time is 45min, and reducing to obtain molten iron containing 0.86% of copper.
Example 2
The copper slag is adopted, wherein the FeS2The addition amount of the copper slag is 8 percent of the mass of the copper slag. The constant-temperature depletion time is 35min, wherein the rotation speed of a mechanical stirrer of a depletion area is controlled at 90 rpm; adding 40% excessive coke and calcium oxide into a reduction zone, wherein the stirring speed of the reduction zone is 90rpm, the reduction time is 30min, and reducing to obtain molten iron containing 0.71% of copper.

Claims (4)

1. A copper slag dilution-side top composite converting and reducing integrated furnace is characterized in that:
the device comprises a dilution system and a reduction system, wherein the dilution system and the reduction system are connected in series;
the furnace body of the copper slag dilution-side top composite converting and reducing integrated furnace is a horizontal furnace body, and the furnace body comprises a furnace body dilution area and a furnace body reduction area;
the dilution system comprises a furnace body dilution zone, a molten copper slag feed inlet, a fuel injection system, a leaner feed inlet, a dilution zone flue gas outlet and a copper matte outlet, wherein the fuel injection system is a fuel spray gun arranged at the side part of the furnace body dilution zone;
the reduction system comprises a furnace body reduction area, a slagging agent feeding port, a reduction area flue gas outlet, an oxygen-enriched blowing system, a slag outlet and a molten iron outlet, wherein the oxygen-enriched blowing system comprises a top-blowing spray gun arranged at the top of the furnace body reduction area and a side-blowing spray gun arranged at the side part of the furnace body reduction area;
and a retaining wall is arranged between the furnace body depletion area and the furnace body reduction area, the top of the retaining wall is connected with the top of the furnace body, the bottom of the retaining wall is connected with the bottom of the furnace body, a channel is arranged in the middle of the retaining wall, and the depletion slag in the furnace body depletion area can pass through the channel through overflow and enter the furnace body reduction area.
2. The copper slag depletion-side top combined converting and reducing integrated furnace of claim 1, characterized in that: the dilution system also comprises a dilution zone mechanical eddy current stirring device, the reduction system also comprises a reduction zone mechanical eddy current stirring device, and the dilution zone mechanical eddy current stirring device and the reduction zone mechanical eddy current stirring device are mechanical stirring paddles driven by a motor and are respectively arranged in the dilution zone of the furnace body and the reduction zone of the furnace body.
3. The copper slag depletion-side top combined converting and reducing integrated furnace of claim 2, characterized in that: the mechanical stirring paddle of the dilution zone mechanical vortex stirring device can adjust the height, and is positioned at the interface of a copper slag layer and a dilution slag layer of a dilution zone molten pool when the copper slag dilution-side top combined converting and reducing integrated furnace works.
4. The copper slag depletion-side top combined converting and reducing integrated furnace of claim 2, characterized in that: the height of a mechanical stirring paddle of the mechanical eddy stirring device in the reduction zone can be adjusted, and the mechanical stirring paddle is positioned at a slag-metal interface of a molten pool in the reduction zone when the copper slag dilution-side top combined converting and reducing integrated furnace works.
CN202110467877.1A 2021-04-28 2021-04-28 Copper slag dilution-side top composite converting and reducing integrated furnace Pending CN113174491A (en)

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