CN210048827U

CN210048827U - Short-process copper smelting system

Info

Publication number: CN210048827U
Application number: CN201820644223.5U
Authority: CN
Inventors: 李东波; 陆志方; 李兵; 梁帅表; 尉克俭; 刘诚; 黎敏; 茹洪顺; 蒋继穆; 曹珂菲; 张海鑫; 颜杰; 李锋; 陆金忠; 周钢; 刘恺
Original assignee: China ENFI Engineering Corp
Current assignee: China ENFI Engineering Corp
Priority date: 2017-06-14
Filing date: 2018-05-02
Publication date: 2020-02-11
Anticipated expiration: 2028-05-02
Also published as: CN208250387U; CN107227410A; CN108396151A; CN208649428U; CN108315567A; CN108396153A

Abstract

The utility model provides a short flow copper smelting system. The copper smelting system comprises a smelting furnace, a copper making furnace and a CR furnace; the smelting furnace is used for smelting the copper concentrate to produce a first copper matte and smelting slag, and is provided with a first copper matte outlet and a smelting slag outlet; the copper making furnace is provided with a copper matte inlet and a copper making slag outlet, the copper matte inlet is communicated with the first copper matte outlet through a first launder, and the copper making furnace is used for carrying out copper making reaction on the first copper matte to generate anode copper and copper making slag; the CR furnace is provided with the smelting slag entry, and the smelting slag entry passes through the second chute intercommunication with the smelting slag export, and the CR furnace is used for carrying out reduction fuming and subsides in order to retrieve the valuable metal in the smelting slag to make harmless sediment to the smelting slag. The copper smelting system realizes short-process copper smelting, simultaneously completes the comprehensive recovery of valuable metals in the produced anode copper and smelting slag and the direct production of harmless slag by the CR furnace, and has good industrial large-scale application prospect.

Description

Short-process copper smelting system

Technical Field

The application relates to the field of copper smelting, in particular to a short-flow copper smelting system.

Background

The traditional pyrometallurgical copper smelting process comprises three steps of smelting, converting and refining, wherein a smelting furnace is used for smelting copper concentrate into matte (also called copper matte) containing 40-60% of copper; blowing the matte into crude copper by using a converting furnace; the crude copper is refined into anode copper by a refining furnace (anode furnace), and then the anode copper is sent to electrolysis to produce a cathode copper plate.

On the other hand, the smelting slag is treated by slag beneficiation processes of slow cooling, crushing, ore grinding, thickening and flotation, the produced slag concentrate returns to a smelting system, and slag tailings are discarded or sold as building material raw materials. The process flow is long, the occupied area is large, more importantly, valuable metals such as zinc, lead, antimony and the like in the slag enter the slag tailings and are not recycled, so that the huge waste of valuable resources is caused; the added beneficiation reagent in the slag beneficiation process and various heavy metals in the slag can cause potential environmental pollution hidden troubles.

SUMMERY OF THE UTILITY MODEL

The application mainly aims to provide a short-flow copper smelting system to solve the problems of valuable metal loss, waste and environmental pollution in the copper smelting method in the prior art.

In order to achieve the above object, according to one aspect of the present application, there is provided a short-circuit copper smelting system including: the smelting furnace is used for smelting the copper concentrate to produce first copper matte and smelting slag; the smelting furnace is provided with a first copper matte outlet and a smelting slag outlet; the copper making furnace is provided with a copper matte inlet and a copper making slag outlet, the copper matte inlet is communicated with the first copper matte outlet through a first launder, and the copper making furnace is used for carrying out copper making reaction on the first copper matte to generate anode copper and copper making slag; and the CR furnace is provided with a smelting slag inlet, the smelting slag inlet is communicated with the smelting slag outlet through a second launder, and the CR furnace is used for reducing fuming and settling the smelting slag to recover valuable metals in the smelting slag and produce harmless slag.

Further, the smelting furnace is a bottom blowing smelting furnace or a side blowing smelting furnace.

Further, the smelting furnace is provided with a copper slag inlet for introducing cooled copper slag into the smelting furnace.

Further, make copper stove still be provided with: the first spray gun is arranged at the side part or the bottom part of the copper making furnace; and a flux inlet for introducing a flux.

Furthermore, the furnace body of the copper making furnace is a horizontal cylindrical furnace body.

Furthermore, the copper making furnace is also provided with a cold charge inlet for adding one or more of electrolytic copper residual anode, scrap copper and solid copper matte into the copper making furnace.

Further, the copper manufacturing system also comprises cooling equipment, and the cooling equipment is used for cooling the copper manufacturing furnace.

Further, the cooling device is a negative pressure water jacket device or a water spray cooling device.

Furthermore, the copper making furnace is also provided with an anode copper outlet; the short-process copper smelting system further comprises a casting device, and the casting device is communicated with the anode copper outlet and is used for casting the anode copper.

Further, the casting apparatus is a double disc caster.

Furthermore, the CR furnaces are arranged in parallel or in series, and the copper making furnaces are arranged in parallel.

Further, the CR furnace comprises a cavity body, the cavity body comprises a reduction fuming cavity and a sedimentation cavity which are communicated, the reduction fuming cavity is communicated with the smelting slag outlet and is used for carrying out reduction fuming treatment on the smelting slag, and a flue gas outlet is arranged on the reduction fuming cavity; the sedimentation cavity is used for carrying out sedimentation treatment on the reducing slag generated after the reduction fuming treatment, and is provided with a second copper matte outlet and a harmless slag outlet; or the CR furnace comprises a cavity body, the cavity body comprises a reduction fuming cavity and a sedimentation cavity which are communicated, the sedimentation cavity is communicated with the smelting slag outlet and is used for carrying out sedimentation treatment on the smelting slag, and the sedimentation cavity is provided with a second copper matte outlet; the reduction fuming cavity is used for carrying out reduction fuming treatment on the sedimentation slag generated after the sedimentation treatment, and a smoke outlet and a harmless slag outlet are arranged on the reduction fuming cavity.

Furthermore, a partition wall is further arranged in the cavity body to divide the cavity body into a reduction fuming cavity and a settling cavity, the reduction fuming cavity and the settling cavity are respectively positioned on two sides of the partition wall along the horizontal direction, and a communicating channel of the reduction fuming cavity and the settling cavity is arranged close to the bottom of the cavity body.

Further, the reduction fuming cavity is also provided with: the second spray gun is arranged on the side part of the reduction fuming cavity and is used for adding the reducing agent into the reduction fuming cavity; and the charging opening is arranged at the top of the reduction fuming cavity and is used for adding the trapping agent into the reduction fuming cavity.

Furthermore, the sedimentation chamber is also provided with a heat supply device for preserving or heating the sedimentation chamber.

Further, the heat supply device is a submerged combustion nozzle or an electrode.

And further, a second copper matte outlet is used for discharging second copper sulfur, and a second copper matte inlet is also arranged on the smelting furnace and used for introducing the cooled second copper sulfur into the smelting furnace.

By applying the technical scheme, the short-process copper smelting system is provided. In the short-flow copper smelting system, the smelting furnace is utilized to smelt the copper concentrate to obtain the first copper matte and smelting slag. After the smelting slag is obtained, the smelting slag can be subjected to reduction fuming and sedimentation by using the CR furnace, and valuable metals such as metal zinc, lead, antimony and the like in the smelting slag can be recovered. The problem of valuable metal loss and waste in the existing copper smelting process is effectively solved, and the problem of environmental pollution caused by the lost metal is avoided; on the other hand, the smelting slag is subjected to reduction fuming and sedimentation to replace the original slag beneficiation flow, so that the floor area of a factory is greatly reduced, the process flow is simpler, and the pollution caused by beneficiation reagents added in the slag beneficiation flow is fundamentally eliminated. Meanwhile, need explain, the utility model discloses a copper smelting device of formula is chosen one load, directly through the chute with the copper matte end of smelting furnace and make copper stove intercommunication, directly through chute and CR stove intercommunication with the end of slagging tap of smelting furnace, realized short flow copper smelting, accomplished output positive pole copper simultaneously, melted in the slag valuable metal comprehensive recovery and the harmless sediment of the direct output of CR stove, had fine industrialization extensive application prospect.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:

FIG. 1 shows a schematic diagram of a short run copper metallurgy system provided according to an embodiment of the present application;

FIG. 2 shows a schematic diagram of a short run copper metallurgy system provided according to an embodiment of the present application;

FIG. 3 shows a schematic diagram of a short run copper metallurgy system provided according to an embodiment of the present application; and

fig. 4 shows a schematic structural diagram of a short-process copper smelting system provided according to an embodiment of the application.

Wherein the figures include the following reference numerals:

10. a smelting furnace; 20. a copper making furnace; 30. a CR furnace; 31. a reduction fuming cavity; 32. a settling chamber; 33. a partition wall; 40. and (5) casting equipment.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As introduced in the background art, the copper smelting method in the prior art has a long flow, and particularly, the treatment of smelting slag requires a large-area slag slow cooling field and a complicated slag beneficiation link, so that the construction cost and the technical complexity are increased, and the problems of valuable metal loss and waste and environmental pollution exist. In order to solve the above problems, the present application proposes a short-flow copper smelting system, as shown in fig. 1, which includes a smelting furnace 10, a copper making furnace 20, and a CR furnace 30; the smelting furnace 10 is used for smelting the copper concentrate to produce a first copper matte and smelting slag; the smelting furnace 10 is provided with a first copper matte outlet and a smelting slag outlet; the copper making furnace 20 is provided with a copper matte inlet and a copper making slag outlet, the copper matte inlet is communicated with the first copper matte outlet through a first launder, and the copper making furnace 20 is used for carrying out copper making reaction on the first copper matte to generate anode copper and copper making slag; CR furnace 30, CR furnace 30 are provided with the smelting slag entry, and the smelting slag entry passes through the second chute intercommunication with the smelting slag export, and CR furnace 30 is used for reducing fuming and subsides the valuable metal in order to retrieve the smelting slag to make harmless sediment, compare prior art, the total flow shortens greatly, is favorable to reducing the construction cost, reduces technical complexity, and has realized that the resource is synthesized and has retrieved and eliminated the environmental protection hidden danger.

The term "harmless slag" as used herein means: the slag polluted by heavy metal can not be caused.

CR furnaces are all known as complete recycle (complete recycle) furnaces.

In the above apparatus, the copper ore can be smelted by the smelting furnace 10 to obtain the first copper matte and the smelting slag. After the smelting slag is obtained, the smelting slag can be subjected to reduction fuming and sedimentation by the CR furnace 30, and valuable metals such as metallic zinc, lead, antimony, and the like in the smelting slag can be recovered. The problem of valuable metal loss and waste in the existing copper smelting process is effectively solved, and the problem of environmental pollution caused by the lost metal is avoided; on the other hand, the smelting slag is subjected to reduction fuming and sedimentation to replace the original slag beneficiation flow, so that the floor area of a factory is greatly reduced, the process flow is simpler, and the pollution caused by beneficiation reagents added in the slag beneficiation flow is fundamentally eliminated. Meanwhile, it should be noted that, in the copper smelting device of the present invention, the CR furnace 30 is communicated with the slag discharging end of the smelting furnace 10, and the copper smelting furnace 20 is communicated with the copper matte end of the smelting furnace 10. After the copper ore is smelted to obtain the first copper matte and the smelting slag, on one hand, the first copper matte is subjected to copper making reaction to generate anode copper with higher grade, on the other hand, the smelting slag produced in the smelting process is subjected to recovery processing, namely, the adopted copper smelting device has the advantages that the copper smelting step is greatly shortened, and the copper smelting device has good industrial large-scale application prospect.

In a preferred embodiment, the CR furnace 30 is a plurality arranged in parallel or in series. Thus, the plurality of CR furnaces 30 produce the second copper matte, the valuable metal, and the water granulated harmless slag by continuous operation or alternate operation, and the treatment efficiency can be improved. Of course, the molten slag may be treated in series by a plurality of CR furnaces 30 to further improve the treatment effect. And will not be described in detail herein.

In a preferred embodiment of the present invention, the copper making furnace 20 is provided in parallel. This also improves the capacity of the device.

In a typical embodiment of the present invention, as shown in fig. 2, two copper making furnaces 20 are arranged in parallel, and one CR furnace is provided; alternatively, the first and second electrodes may be,

in another exemplary embodiment of the present invention, as shown in fig. 3, there is one copper making furnace 20, and two CR furnaces are connected in parallel; alternatively, the first and second electrodes may be,

in another exemplary embodiment of the present invention, as shown in fig. 4, two copper making furnaces 20 are connected in parallel, and two CR furnaces are connected in parallel.

In a preferred embodiment, the furnace 10 is a bottom-blowing furnace or a side-blowing furnace.

In a preferred embodiment, the smelting furnace 10 is provided with a copper slag making inlet for passing cooled copper slag into the smelting furnace 10. By adding the copper making slag, the overheating problem in the smelting process can be relieved, the smelting process can be easier under higher oxygen-enriched concentration, and the amount of flue gas generated is reduced.

In a preferred embodiment, the copper making furnace 20 is further provided with a first spray gun and a flux inlet, the first spray gun is arranged at the side or the bottom of the copper making furnace 20 and is used for spraying an oxidant and an optional reducer into the copper making furnace 20; the flux inlet is used for introducing flux. Specifically, when the oxygen content in the metallic copper in the copper making furnace is less than 0.2%, on one hand, it indicates that the impurities are more sufficiently oxidized and enter into the copper making slag, and on the other hand, it indicates that the copper is not substantially oxidized. At this moment, the utility model discloses in adopt the technology that only oxidation is not reduced in making copper reaction process, can directly obtain positive pole copper. When the oxygen content in the metal copper in the copper making furnace is higher than 0.2%, the copper is partially oxidized while removing impurities. At this time, a reducing agent may be further added to carry out a reduction reaction of these copper oxide impurities. Just the utility model discloses carry out reduction reaction after will making the copper slag discharge and make the copper stove, can also prevent that the impurity that the oxidation made the sediment before from returning to dissolve in the metal copper to can further guarantee the grade of positive pole copper.

In a preferred embodiment, the body of the copper making furnace 20 is a horizontal cylindrical furnace body.

In a preferred embodiment, the copper making furnace 20 is further provided with a cold charge inlet for adding one or more of electrolytic copper scrap, scrap copper and solid copper matte to the copper making furnace 20. Preferably, the copper making system further comprises a cooling device, and the cooling device is used for cooling the copper making furnace 20. Thus, the copper making furnace 20 can be ensured to maintain heat balance in the copper making reaction stage, conditions are created for spraying oxygen-enriched gas into the copper making furnace, and the service life of the furnace can be prolonged. More preferably, the cooling device is a negative pressure water jacket device or a water mist spray cooling device.

In order to shorten the process, CN103382528 proposes a two-step copper smelting process, in which copper concentrate is smelted into matte containing 65-78% of copper in a smelting furnace, and then oxidation reduction reaction is carried out in a converting furnace to directly produce anode copper. The method mainly has the problems of heat balance and smoke caused by the heat balance: the redox reaction in the converting furnace gives off a large amount of heat which must be carried away in some way to maintain heat balance; the process takes away reaction heat through gas by adjusting the amount of oxygen, air and nitrogen, so that the total amount of the sprayed gas is required to be more, the relative oxygen concentration is inevitably lower, the smoke gas amount is large, and the sulfur dioxide content in the smoke gas is low. Therefore, the subsequent flue gas treatment system and the acid making system have large scale, large investment and high operation cost. Meanwhile, the large amount of gas injected can cause the violent stirring of the whole melt, the large kinetic energy of the melt for washing the furnace lining and the short service life of the furnace. In addition, the patent does not indicate how to make the matte grade in the smelting furnace reach 65-78%.

Different with the heat balance mode in the above-mentioned patent, the utility model discloses in adopted to add the cold burden in to making the copper stove, and/or to spouting into the water smoke in making the copper stove, and/or set up cooling element's heat balance mode in the furnace body outside of making the copper stove. The advantages of each approach are as follows:

for the way of adding cold charge: because the reaction in the copper making furnace is exothermic, the cold charge is added to realize heat balance, and the heat released by the reaction is utilized to melt the cold charge, so that the heat is fully utilized. The cold charge added can be one or more of scrap copper, electrolytic scrap copper and solid copper matte. In the existing copper smelting plant, secondary copper materials such as waste copper, electrolytic anode scrap copper and the like are melted by adopting an independent metallurgical furnace, so that extra fuel is needed to heat cold materials, more importantly, independent equipment needs to be purchased, an independent workshop is built, and independent workers are configured, and the operation cost of the plant is greatly increased. And adopt the above-mentioned embodiment of the utility model discloses under the condition of not additionally increasing equipment, factory building, personnel, not only handled materials such as waste impure copper, electrolytic anode scrap copper, still saved energy, the resource that the melting material needs, economic benefits is very showing. In a word, the abundant heat of the copper making furnace is utilized to melt the impure copper, so that the treatment cost of the impure copper is reduced.

For the way of setting up the furnace body cooling element: preferably, a water jacket is adopted, which is also used for heat dissipation and realizes heat balance of the furnace body.

For the mode of spraying water mist: because water absorbs a large amount of heat during gasification, more heat can be taken away under the condition that the final gas amount is smaller, so that the copper making reaction can be carried out under the condition of high oxygen-enriched blowing, and the high oxygen-enriched concentration blowing just solves the problem caused by adopting low oxygen-enriched concentration blowing in patents such as CN103382528 and the like. In addition, the spraying of the water mist has the following advantages: 1) the furnace temperature is controlled more effectively. Because the gasification of the water can absorb a large amount of heat, and the small change of the sprayed water amount can cause large change of the heat, the furnace temperature can be controlled more accurately and effectively; 2) the service life of the spray gun is prolonged. Because the high oxygen-enriched air refining efficiency is high, the air quantity sprayed by the spray gun is less than that of air refining with low oxygen-enriched concentration, the working strength of the spray gun is low, and the service life of the spray gun can be prolonged due to the cooling effect of water; 3) taking the oxygen-enriched concentration of 40% as an example, the smelting intensity can be about 1 time higher than that of the low oxygen-enriched concentration (21% -25%). Under the condition of the same amount of flue gas, the amount of materials which can be processed by high oxygen-enriched concentration (such as 40%) is about 1 time higher; 4) low energy consumption and low power consumption. The power of the water spray device is much smaller than the size of the device for blowing air.

Just because the utility model discloses foretell heat balance mode makes the utility model provides a make copper stove can go on under the condition of high oxygen boosting concentration converting. And in the step of carrying out copper making reaction on the first copper matte, the obtained anode copper is copper melt.

In a preferred embodiment, the copper making furnace 20 is further provided with an anode copper outlet; the short-process copper smelting system further comprises a casting device 40, wherein the casting device 40 is communicated with the anode copper outlet and is used for casting the anode copper. The copper melt can be further cast by providing a casting apparatus 40 to form an anode copper plate or the like. More preferably, the casting apparatus 40 is a twin-disc casting machine.

In a preferred embodiment, the CR furnace 30 includes a cavity, the cavity includes a reduction fuming chamber 31 and a settling chamber 32 which are communicated, the reduction fuming chamber 31 is communicated with a smelting slag outlet and is used for performing reduction fuming treatment on the smelting slag, a flue gas outlet is arranged on the reduction fuming chamber 31, the settling chamber 32 is communicated with the reduction fuming chamber 31 and is used for performing settling treatment on the reduction slag generated after the reduction fuming treatment, and the settling chamber 32 is provided with a second copper matte outlet and a harmless slag outlet; or CR stove 30 includes the cavity, and the cavity is including the reduction fuming chamber 31 and the settlement chamber 32 that are linked together, and settlement chamber 32 and smelting slag export intercommunication for subside the processing to the smelting slag, and subside the chamber 32 and be provided with the second copper matte export, and reduction fuming chamber 31 and settlement chamber 32 intercommunication are used for carrying out reduction fuming to the settlement slag that produces after subsiding the processing, are provided with flue gas export and harmless sediment discharge port on the reduction fuming chamber 31.

Thus, the CR furnace 30 provided by the present invention is an integrated device, which simultaneously comprises the reduction fuming chamber 31 and the sedimentation chamber 32 which are communicated with each other, and the connection relationship between the reduction fuming chamber 31 and the sedimentation chamber 32 is selected, so that the reduction fuming can be determined first, and then the sedimentation is determined; or firstly settling and then reducing fuming.

When the reduction fuming cavity 31 is communicated with the smelting slag outlet and the settling cavity 32 is communicated with the reduction fuming cavity 31, the reduction fuming treatment can be carried out on the smelting slag firstly and then the settling treatment can be carried out. When the smelting slag is subjected to reduction and fuming treatment, magnetic iron (ferroferric oxide) in the smelting slag can be reduced into ferrous oxide for slagging, so that the viscosity of the smelting slag can be reduced, the subsequent sedimentation separation effect is improved, and the second copper matte can be conveniently separated from the reduction slag. Meanwhile, after valuable metal oxides such as zinc, lead, antimony and the like are reduced into metal, the metal is converted into valuable metal smoke gas due to volatility and is separated out, so that the purpose of recovering the valuable metal is achieved. After the reduction fuming treatment, the obtained reduction slag (in a flowing state) enters a settling chamber for settling separation, and further second copper matte and harmless slag are obtained. More importantly, the smelting slag after reduction fuming treatment directly enters sedimentation separation by adopting integrated equipment, so that the treatment efficiency can be greatly improved; on the other hand, as the reducing slag directly enters the sedimentation treatment, the more stable fluid state can be kept, and only small temperature change or even no temperature change exists in the process, so that the reduction slag has better sedimentation effect due to two reasons, and the recovery rate of the second copper matte can be further improved.

When the sedimentation cavity 32 is communicated with the smelting slag outlet and the reduction fuming cavity 31 is communicated with the sedimentation cavity 32, the smelting slag can be firstly subjected to sedimentation treatment and then subjected to reduction fuming treatment. Therefore, the copper matte in the smelting slag can be separated firstly, and then the reduction fuming treatment stage is carried out, so that valuable metals such as zinc and the like in the copper matte can be further recovered. It should be noted that, compared with the mode of sedimentation before reduction fuming treatment, the present invention preferably adopts the mode of sedimentation after reduction fuming treatment. For the mode of reducing fuming before settling treatment, the method has the advantages that: the higher the temperature of the settling separation, the better the separation effect. The temperature required by reduction and fuming is very high (1200-1400 ℃), so that the temperature of the material after reduction and fuming is very high, and the separation can be realized in the settling stage without additional heating. Of course, the sedimentation treatment may be conducted by supplementing heat in such a manner that the reduction fuming is performed before the sedimentation treatment. However, the way of settling separation and then reducing fuming is necessary to supplement heat during the settling treatment. The specific heat supplementing mode can be as follows: the sedimentation section can be heated or insulated by electrodes (for example, 3-6 electrodes can be arranged), and/or an immersed combustion nozzle (the immersed combustion nozzle sprays fuel and oxygen, and the amount of the oxygen is controlled to enable the fuel to be in an incomplete combustion state) is arranged. In addition, the mode of firstly reducing fuming and then settling treatment also has the following advantages: after the reducing slag stays in the settling chamber for a certain time, the settling and layering of the slag matte can be more fully realized, the harmless slag is discharged from the upper part, and the second copper matte is discharged from the lower part.

In a preferred embodiment, a partition wall 33 is further disposed in the chamber body to divide the chamber body into a reduction fuming chamber 31 and a settling chamber 32, the reduction fuming chamber 31 and the settling chamber 32 are respectively disposed at two sides of the partition wall 33 along the horizontal direction, and a communication passage of the reduction fuming chamber 31 and the settling chamber 32 is disposed near the bottom of the chamber body. Set up like this, carry out the reaction in reduction fuming chamber 31 have fluidity melt and subside between the melt that carries out settlement processing in the chamber, can realize more steady flow, and the partition wall can block stirring and surperficial float in the reduction fuming chamber to further improve the effect of subsiding the processing. Preferably, the partition wall 33 is a water-cooled partition wall.

In a preferred embodiment, the reduction fuming chamber 31 is further provided with: the second spray gun is arranged at the side part of the reduction fuming cavity 31 and is used for adding a reducing agent into the reduction fuming cavity 31; the feed inlet is arranged at the top of the reduction fuming chamber 31 and is used for adding the trapping agent into the reduction fuming chamber 31. The feeding mode can further improve the reduction fuming treatment effect of the smelting slag.

In a preferred embodiment, the settling chamber 32 is further provided with a heat supply for keeping the settling chamber 32 warm or for increasing the temperature. The heat-supplying means being a submerged combustion nozzle or electrode (as may be particularly mentioned hereinbefore)

In a preferred embodiment, the second copper matte outlet is used for discharging the second copper sulfur, and the smelting furnace 10 is further provided with a second copper matte inlet for introducing the cooled second copper matte into the smelting furnace 10. This can improve the utilization of copper. Meanwhile, the overheating phenomenon in the smelting furnace can be further avoided, and the smelting effect is improved.

The application provides a short-flow copper smelting method, and a copper smelting device adopted by the method comprises a smelting furnace, a copper making furnace, a CR furnace, a first launder and a second launder; the smelting furnace is provided with a copper matte outlet and a smelting slag outlet; the copper making furnace is provided with a copper matte inlet, and the copper matte inlet is communicated with the copper matte outlet through a first launder; a smelting slag inlet is arranged on the CR furnace and is communicated with a smelting slag outlet through a second chute; the short-process copper smelting method comprises the following steps: smelting the copper concentrate in a smelting furnace to obtain first copper matte and smelting slag; carrying out copper making reaction on the first copper matte in a copper making furnace to generate anode copper and copper making slag; reducing, fuming and settling the smelting slag in a CR furnace to comprehensively recover valuable metals in the smelting slag and produce harmless slag; the valuable metal comprises one or more of lead, zinc and antimony; compared with the prior art, the short-flow copper smelting method has the advantages that the total flow is greatly shortened, the construction cost is favorably reduced, the technical complexity is reduced, the comprehensive recovery of resources is realized, and the hidden danger of environmental protection is eliminated.

In the above method, after the smelting slag is obtained, valuable metals such as metallic zinc, lead, antimony and the like in the smelting slag can be recovered by subjecting the smelting slag to reduction fuming and sedimentation. The problem of valuable metal loss and waste in the existing copper smelting process is effectively solved, and the problem of environmental pollution caused by the lost metal is avoided; on the other hand, the smelting slag is subjected to reduction fuming and sedimentation to replace the original slag beneficiation flow, so that the floor area of a factory is greatly reduced, the process flow is simpler, and the pollution caused by beneficiation reagents added in the slag beneficiation flow is fundamentally eliminated. Meanwhile, need to explain, the utility model discloses an above-mentioned copper smelting method has adopted the copper metallurgy device of one kind of formula of choosing, directly passes through the chute with the copper smelting furnace intercommunication with the copper matte end of smelting furnace, directly passes through chute and CR stove intercommunication with the end of slagging tap of smelting furnace, has realized short flow copper smelting, has accomplished output positive pole copper simultaneously, has synthesized recovery of valuable metal in the smelting slag and the harmless sediment of the direct output of CR stove, has fine industrialization extensive application prospect.

In a preferred embodiment, the step of smelting the copper concentrate in a smelting furnace comprises: mixing the copper concentrate with a first flux to obtain a mixture; and putting the mixture into a smelting furnace, and smelting under the action of a first oxidant to obtain first copper matte and smelting slag. Preferably, the smelting process adopts a bottom-blowing smelting method or a side-blowing smelting method. The copper matte grade can be further improved by using a bottom-blowing smelting method or a side-blowing smelting method. More preferably, the first flux is selected from quartz stone and/or limestone; the first oxidant is selected from one or more of oxygen, compressed air and oxygen-enriched air.

In a preferred embodiment, the step of smelting the copper concentrate in a smelting furnace is carried out with a first oxidizing agent injected in an amount of 120Nm per ton of copper concentrate ³Above O ₂So that the copper content of the first copper matte is 70 wt% or more. Controlling the injection amount of the first oxidant to 120 Nm/ton of copper concentrate ³Above O ₂The copper content of the first copper matte can be more than or equal to 70 wt%, so that the problem of large copper-making slag amount caused by too low copper content of the first copper matte can be avoided, and the problem of low copper direct recovery rate caused by the problem can be prevented. More preferably the firstThe injection amount of the oxidant is 120-200 Nm corresponding to each ton of copper concentrate ³O ₂So that the copper content of the first copper matte is 70-78 wt%, which can further avoid the problem of overhigh copper content in the smelting slag caused by overhigh copper content of the first copper matte, and prevent the problem of low direct copper yield caused by overhigh copper content. In addition, when the copper content of the copper matte is 70-78%, elements such as lead, zinc, antimony and the like enter smelting slag in an oxide form, and the elements can be recovered from the CR furnace in a follow-up mode. If the copper content of the matte is low, e.g., 40-50%, some of these elements will remain in the matte and will not be available for subsequent recovery from the CR furnace.

In a preferred embodiment, in the step of smelting the copper concentrate in the smelting furnace, the cooled copper-making slag is put into the smelting furnace to be smelted together with the copper concentrate. By adding the cooled copper making slag, the overheating problem in the smelting process can be relieved, the smelting process can be more easily carried out under higher oxygen-enriched concentration, and the amount of generated smoke is reduced.

In addition, the smelting temperature in the smelting process is preferably 1150-1300 ℃, and the adding amount of the first fusing agent is 1-20% of the total weight of the copper ore.

The copper-making reaction is used for directly producing anode copper. In a preferred embodiment, the step of performing a copper making reaction on the first copper matte in a copper making furnace further comprises: simultaneously adding a cold material into the copper making furnace, and/or spraying water mist into the copper making furnace, and/or arranging a cooling element outside the furnace body of the copper making furnace; wherein the cold charge comprises one or more of scrap copper, electrolytic scrap copper and solid copper matte.

Just because the utility model discloses foretell heat balance mode makes the utility model provides a make copper stove can go on under the condition of high oxygen boosting concentration converting. In a preferred embodiment, in the step of performing the copper making reaction, oxygen-enriched air is injected into the copper making furnace to oxidize the first copper matte to perform the copper making reaction, and the volume percentage of oxygen in the oxygen-enriched air is 30-80%. Although CN103382528 mentions that the oxygen concentration of the converting furnace is 9-60%, the oxygen concentration can only be maintained below 25% actually because the oxygen is taken away by gas, and the high oxygen-enriched concentration cannot be really realized. And the utility model discloses in rely on above-mentioned heat balance means, can reach 30 ~ 80% oxygen boosting air concentration completely.

In a preferred embodiment, in the step of copper making reaction, after the step of oxidizing treatment, when the oxygen content in the metal copper in the copper making furnace is less than 0.2%, the copper making slag is discharged out of the copper making furnace to obtain anode copper; when the oxygen content in the metal copper in the copper making furnace is higher than 0.2%, discharging the copper making slag out of the copper making furnace, and introducing a reducing agent into the copper making furnace to perform a reduction reaction on copper oxide impurities so as to obtain anode copper.

The purpose of the copper making reaction is to remove sulfur elements and other impurities in the first copper matte to obtain qualified anode copper. The impurity removing process mainly utilizes oxidation reaction to oxidize and slag-make remove impurities in the copper. When the oxygen content in the metal copper in the copper making furnace is lower than 0.2 percent, on one hand, the impurities are fully oxidized and enter the copper making slag, and on the other hand, the copper is not substantially oxidized. At this moment, the utility model discloses in adopt the technology that only oxidation is not reduced in making copper reaction process, can directly obtain positive pole copper. When the oxygen content in the metal copper in the copper making furnace is higher than 0.2%, the copper is partially oxidized while removing impurities. At this time, a reducing agent may be further added to carry out a reduction reaction of these copper oxide impurities. Just the utility model discloses carry out reduction reaction after will making the copper slag discharge and make the copper stove, can also prevent that the impurity that the oxidation made the sediment before from returning to dissolve in the metal copper to can further guarantee the grade of positive pole copper.

In a preferred embodiment, in the step of oxidizing the first copper matte in the copper making furnace, the second flux is added from the top of the copper making furnace; and simultaneously, oxygen-enriched air is sprayed into the copper making furnace in a bottom blowing mode for oxidation treatment, or a first reducing agent is optionally sprayed for reduction reaction. Preferably, the second flux is selected from quartz stone and/or limestone. Preferably, the first reducing agent is selected from one or more of natural gas, liquefied petroleum gas and a solid carbon-based reducing agent, and preferably, the solid carbon-based reducing agent is pulverized coal and/or a solid carbon-containing reducing agent. The process and the reagent can further improve the effect of the copper-making reaction. The "oxygen-enriched air" herein refers to a gas having an oxygen concentration greater than that of air, and can be obtained, for example, by incorporating oxygen into air.

The CR furnace has the functions of recovering valuable metals in the smelting slag through reduction fuming and sedimentation and producing harmless slag. In a preferred embodiment, the CR furnace comprises a cavity body, and the cavity body comprises a reduction fuming cavity and a sedimentation cavity which are communicated; the step of recovering valuable metals from the smelting slag comprises the following steps: carrying out reduction fuming treatment on the smelting slag in a reduction fuming cavity to obtain valuable metal smoke and reduction slag, and carrying out sedimentation treatment on the reduction slag in a sedimentation cavity to obtain second copper matte and harmless slag; or carrying out sedimentation treatment on the smelting slag in a sedimentation cavity to obtain second copper matte and sedimentation slag, and carrying out reduction fuming treatment on the sedimentation slag in a reduction fuming cavity to obtain valuable metal flue gas and harmless slag.

The CR furnace is an integrated recovery furnace and simultaneously comprises a reduction fuming cavity and a sedimentation cavity. In the first treatment mode, the smelting slag is subjected to reduction fuming treatment and sedimentation treatment in sequence. When the smelting slag is subjected to reduction fuming treatment, magnetic iron (ferroferric oxide) in the smelting slag can be reduced into ferrous oxide for slagging, so that the viscosity of the smelting slag can be reduced, the subsequent sedimentation separation effect is improved, and the second copper matte can be conveniently separated from the reduction slag. Meanwhile, after valuable metal oxides such as zinc, lead, antimony and the like are reduced into metal, the metal is converted into valuable metal smoke gas due to volatility and is separated out, so that the purpose of recovering the valuable metal is achieved. And after the reduction fuming treatment, the obtained reduction slag (in a flowing state) enters a settling cavity for settling separation to obtain second copper matte and harmless slag. More importantly, the reducing slag after the reduction fuming treatment directly enters the settling separation, so that the treatment efficiency can be greatly improved on one hand; on the other hand, as the reducing slag directly enters the sedimentation treatment, the more stable fluid state can be kept, and only small temperature change or even no temperature change exists in the process, so that the reduction slag has better sedimentation effect due to two reasons, and the recovery rate of the second copper matte can be further improved.

In the second treatment, the sedimentation treatment is provided before the reduction fuming treatment. Therefore, the copper matte in the smelting slag can be separated firstly, and then reduction and fuming treatment stages are carried out, so that valuable metals such as zinc, lead, antimony and the like in the copper matte can be further recovered.

It should be noted that, compared with the mode of sedimentation before reduction fuming treatment, the present invention preferably adopts the mode of sedimentation after reduction fuming treatment. For the mode of reducing fuming before settling treatment, the method has the advantages that: the higher the temperature of the settling separation, the better the separation effect. The temperature required by reduction and fuming is very high (1200-1400 ℃), so that the temperature of the material after reduction and fuming is very high, and the separation can be realized in the settling stage without additional heating. Of course, the sedimentation treatment may be conducted by supplementing heat in such a manner that the reduction fuming is performed before the sedimentation treatment. However, the way of settling separation and then reducing fuming is necessary to supplement heat during the settling treatment. The specific heat supplementing mode can be as follows: the sedimentation section can be heated or insulated by electrodes (for example, 3-6 electrodes can be arranged) and/or an immersed combustion nozzle (the immersed combustion nozzle sprays fuel and oxygen, and the amount of the oxygen is controlled to enable the fuel to be in an incomplete combustion state) is arranged. In addition, the mode of firstly reducing fuming and then settling treatment also has the following advantages: after the reducing slag stays in the settling chamber for a certain time, the settling and layering of the slag matte can be more fully realized, the harmless slag is discharged from the upper part, and the second copper matte is discharged from the lower part.

In the specific operation, the smelting slag can be subjected to reduction fuming and sedimentation for multiple times, or the smelting slag can be divided into multiple parts to be subjected to reduction fuming and sedimentation respectively. As would be appreciated by those skilled in the art in light of the teachings of the present invention, and will not be described in detail herein.

In a preferred embodiment, a partition wall is further arranged in the cavity body to divide the cavity body into a reduction fuming cavity and a sedimentation cavity, the fuming reduction fuming cavity and the sedimentation cavity are respectively positioned at two sides of the partition wall along the horizontal direction, and a communication channel of the reduction fuming cavity and the sedimentation cavity is arranged near the bottom of the cavity body. Set up like this, carry out the reaction in the reduction fuming chamber have fluidity melt and subside between the melt that subsides the processing in the chamber, can realize more steady flow, and the partition wall can block stirring and surperficial float in the reduction fuming chamber to further improve the effect of subsiding the processing.

In a preferred embodiment, the step of reducing the fuming treatment comprises: adding a second reducing agent into the reduction fuming cavity to carry out reduction fuming treatment; preferably, the second reducing agent is selected from one or more of natural gas, coal gas, liquefied petroleum gas, iron powder and a solid carbon-based reducing agent, and more preferably, the solid carbon-based reducing agent is selected from lump coal and/or pulverized coal. The reagent is selected for reduction fuming treatment, so that valuable metals are recycled more thoroughly. In the actual operation process, an oxidant is sprayed into the reduction fuming cavity at the same time to provide heat through combustion, and meanwhile, the oxidant can also react with the reducing agent to generate reducing gas such as carbon monoxide and the like to play a reducing role together with the added reducing agent.

In a preferred embodiment, a side-blowing lance is provided in the reduction fuming chamber, and in the step of the reduction fuming treatment, the second reducing agent is blown into the reduction fuming chamber by using the side-blowing lance. More preferably, the reduction fuming cavity is further provided with a smoke outlet, and the step of reduction fuming treatment further comprises: secondary air is introduced into the upper part of the reduction fuming cavity or the smoke outlet. Thus, valuable metal flue gas can be oxidized into valuable metal oxides, and then flue gas recovery is carried out.

In a preferred embodiment, in the step of reduction fuming treatment, the reaction temperature is 1200-1400 ℃. More preferably, when the reduction fuming step is located before the sedimentation treatment step, a trapping agent is added to the reduction fuming chamber while the reduction fuming treatment is carried out; preferably the collector is selected from the first sulphiding agent and/or copper concentrate, more preferably the first sulphiding agent is selected from pyrite and/or pyrite. When the reduction fuming treatment step is positioned after the sedimentation treatment step, a second vulcanizing agent and/or copper concentrate is added into the sedimentation chamber at the same time of the sedimentation treatment, and the second vulcanizing agent is preferably selected from one or more of pyrite, pyrite and lead-smelting copper dross.

And a vulcanizing agent and/or copper concentrate are/is added, so that the copper matte grade in the smelting slag is favorably reduced and is converted into low-grade copper matte (second copper matte), the copper content in harmless slag can be reduced, and the recovery rate of copper is further improved. In the mode that the reduction fuming treatment step is positioned after the sedimentation treatment step, because the sedimentation slag is recovered in the subsequent reduction fuming step, waste slag such as lead-smelting copper dross slag can be used as a vulcanizing agent, and lead in the waste slag can be volatilized and recovered together with lead in the sedimentation slag in the reduction fuming step, so that difficult-to-treat miscellaneous materials generated in some production processes can be fully utilized, the comprehensive utilization of resources is realized, and no additional equipment investment and process links are added.

More preferably, the step of settling treatment further comprises: inert gas and/or sulphur dioxide gas is bubbled into the settling chamber. This creates a slight agitation which facilitates the separation of the copper and slag. More preferably, sulphur dioxide gas is blown in, which in addition to the agitation also acts as a partial sulfidiser, which is more advantageous for producing low-grade copper matte in the settling stage.

In a preferred embodiment, the copper smelting method further comprises the step of returning the second copper matte to the smelting furnace for smelting after the step of obtaining the second copper matte. This can improve the utilization of copper.

In a preferred embodiment, the copper smelting method further comprises the step of returning the second copper matte to the copper making furnace for copper making after the step of obtaining the second copper matte. This can improve the utilization of copper. Since the second copper matte is generally added in a cooled state (and the solid second copper matte), it also functions as a heat balance.

In a preferred embodiment, in the step of carrying out the copper making reaction on the first copper matte, the obtained copper is a copper melt; after the step of copper making reaction, the copper smelting method further comprises the step of casting and molding the copper melt. Thus, the copper melt can be further cast to form products such as copper anode plates and the like.

The following examples further illustrate the beneficial effects of the present invention:

example 1

Copper smelting is carried out by using the copper smelting device shown in FIG. 1, and the process conditions of the devices are as follows:

smelting furnace: the smelting temperature is 1300 ℃; the flux is quartz stone, and the addition amount of the flux is 10 percent of the total weight of the copper ore; the oxidant is oxygen, and the addition amount of the oxidant is 150Nm per ton of copper ore ³O ₂；

A copper making furnace: the flux is quartz stone, and the addition amount of the flux is 20% of the total weight of the first copper matte; the oxidant is oxygen-enriched air with oxygen volume content of 40 percent, and the addition amount of the oxidant is 200 Nm/ton of the first copper matte ³O ₂(ii) a Spraying water mist while spraying oxidant into the copper making furnace by using a spray gun; simultaneously adding cold material scrap copper into the copper making furnace; the reducing agent is pulverized coal, the copper-making slag is discharged before the reducing agent is sprayed, and the cooled copper-making slag returns to the smelting furnace.

A CR furnace: reducing and fuming, and then settling; in the step of reduction fuming treatment, the reaction temperature is 1200 ℃; the reducing agent is pulverized coal, and the adding amount of the reducing agent is 10 percent of the total weight of the smelting slag; a small amount of oxygen is introduced to provide combustion-supporting concurrent heating; introducing sulfur dioxide gas into the settling chamber, and adding a vulcanizing agent pyrite to produce low-grade copper matte; and returning the obtained low-grade copper matte to the smelting furnace.

And (3) processing results: 100 ten thousand tons of copper concentrate is treated every year, and the concentrate contains 20 percent of copper and 2 percent of zinc; smelting to produce 25 ten thousand tons of copper matte with 75 percent of copper, 65 ten thousand tons of smelting slag with 3 percent of copper and 2.77 percent of zinc in the smelting slag; the copper making furnace produces 23.5 ten thousand tons of anode copper, 99.3 percent of copper and 0.05 percent of sulfur; after the smelting slag is treated by a CR furnace (reduction fuming and sedimentation), the copper content of the slag is 0.3 percent, and the zinc content of the slag is 0.28 percent. The copper recovery rate of the whole system is about 99 percent, and the zinc recovery rate is about 80 percent.

Example 2

The treatment method is the same as that of the example 1, and the difference is that the copper ore raw material is different, and the method specifically comprises the following steps:

processing 150 ten thousand tons of copper concentrate every year, wherein the concentrate contains 25 percent of copper, 1.5 percent of zinc and 0.5 percent of antimony; smelting to produce 40 ten thousand tons of copper matte with 75 percent of copper, 100 ten thousand tons of smelting slag with 2 percent of copper and 2.03 percent of zinc in the smelting slag; 45 ten thousand tons of anode copper are produced by the copper making furnace, 99.2 percent of copper is contained, and 0.03 percent of sulfur is contained; after the smelting slag is treated by a CR furnace, the copper content of the slag is 0.3 percent, and the zinc content of the slag is 0.20 percent. The copper recovery rate of the whole system is about 99 percent, and the zinc recovery rate is about 80 percent.

Example 3

The processing method is the same as that of the embodiment 1, except that:

smelting furnace: the smelting temperature is 1300 ℃; the flux is quartz stone, and the addition amount of the flux is 20 percent of the total weight of the copper ore; the oxidant is oxygen, and the addition amount of the oxidant is 200Nm per ton of copper ore ³O ₂；

And (3) processing results: 100 ten thousand tons of copper concentrate is treated every year, and the concentrate contains 20 percent of copper and 2 percent of zinc; smelting to produce 26 ten thousand tons of copper matte with 78 percent of copper, 62 ten thousand tons of smelting slag with 4 percent of copper and 2.05 percent of zinc in the smelting slag; the copper making furnace produces 23.6 ten thousand tons of anode copper, 99.5 percent of copper and 0.03 percent of sulfur; after the smelting slag is treated by a CR furnace (reduction fuming and sedimentation), the copper content of the slag is 0.2 percent, and the zinc content of the slag is 0.26 percent. The copper recovery rate of the whole system is about 99 percent, and the zinc recovery rate is about 82 percent.

Example 4

The processing method is the same as that of the embodiment 1, except that:

smelting furnace: the smelting temperature is 1150 ℃; the flux is quartz stone, and the addition amount of the flux is 1 percent of the total weight of the copper ore; the oxidant is oxygen, and the addition amount of the oxidant is 120Nm per ton of copper ore ³O ₂；

And (3) processing results: 100 ten thousand tons of copper concentrate is treated every year, and the concentrate contains 20 percent of copper and 2 percent of zinc; 26 ten thousand tons of copper matte, 70 percent of copper, 70 ten thousand tons of smelting slag, 2.5 percent of copper and 3.25 percent of zinc in the smelting slag are produced by smelting; the copper making furnace produces 23.1 ten thousand tons of anode copper, 99.1 percent of copper and 0.03 percent of sulfur; after the smelting slag is treated by a CR furnace (reduction fuming and sedimentation), the copper content of the slag is 0.3 percent, and the zinc content of the slag is 0.27 percent. The copper recovery rate of the whole system is about 99 percent, and the zinc recovery rate is about 80 percent.

Example 5

The processing method is the same as that of the embodiment 1, except that:

smelting furnace: the smelting temperature is 1100 ℃; the flux is quartz stone, and the addition amount of the flux is 0.8 percent of the total weight of the copper ore; the oxidant is oxygen, and the addition amount of the oxidant is 90Nm per ton of copper ore ³O ₂；

And (3) processing results: 100 ten thousand tons of copper concentrate is treated every year, and the concentrate contains 20 percent of copper and 2 percent of zinc; smelting to produce 20 ten thousand tons of copper matte with 65 percent of copper and 78 ten thousand tons of smelting slag with 5 percent of copper, wherein the smelting slag contains 4.71 percent of zinc; the copper making furnace produces 22.8 ten thousand tons of anode copper, 98.0 percent of copper and 0.1 percent of sulfur; after the smelting slag is treated by a CR furnace (reduction fuming and sedimentation), the copper content of the slag is 0.6 percent, and the zinc content of the slag is 0.49 percent. The copper recovery rate of the whole system is about 95 percent, and the zinc recovery rate is about 78 percent.

Example 6

The processing method is the same as that of the embodiment 1, except that:

a copper making furnace: the flux is quartz stone, and the addition amount of the flux is 20% of the total weight of the first copper matte; the oxidant is oxygen-enriched air with oxygen volume content of 80%, and the addition amount of the oxidant is 120 Nm/ton of the first copper matte ³O ₂(ii) a Use the spraySpraying water mist while spraying oxidant into the copper making furnace by the gun; simultaneously adding cold material scrap copper into the copper making furnace; the reducing agent is pulverized coal; before the reducing agent is sprayed, the copper-making slag is discharged, cooled and returned to the smelting furnace.

And (3) processing results: 100 ten thousand tons of copper concentrate is treated every year, and the concentrate contains 20 percent of copper and 2 percent of zinc; smelting to produce 25 ten thousand tons of copper matte with 75 percent of copper, 65 ten thousand tons of smelting slag with 3 percent of copper and 2.77 percent of zinc in the smelting slag; the copper making furnace produces 24.6 ten thousand tons of anode copper, 99.5 percent of copper and 0.03 percent of sulfur; after the smelting slag is treated by a CR furnace (reduction fuming and sedimentation), the copper content of the slag is 0.4 percent, and the zinc content of the slag is 0.32 percent. The copper recovery rate of the whole system is about 99.6 percent, and the zinc recovery rate is about 80 percent.

Example 7

The processing method is the same as that of the embodiment 1, except that:

a copper making furnace: the flux is quartz stone, and the addition amount of the flux is 20% of the total weight of the first copper matte; the oxidant is oxygen-enriched air with 30 percent of oxygen volume content, and the addition amount of the oxidant is 140Nm3O added in each ton of the first copper matte ₂(ii) a Spraying water mist while spraying oxidant into the copper making furnace by using a spray gun, and adding cold material scrap copper into the copper making furnace; the reducing agent is pulverized coal; before the reducing agent is sprayed, the copper-making slag is discharged, cooled and returned to the smelting furnace.

And (3) processing results: 100 ten thousand tons of copper concentrate is treated every year, and the concentrate contains 20 percent of copper and 2 percent of zinc; smelting to produce 25 ten thousand tons of copper matte with 75 percent of copper, 65 ten thousand tons of smelting slag with 3 percent of copper and 2.77 percent of zinc in the smelting slag; the copper making furnace produces 22.0 ten thousand tons of anode copper, 98.8 percent of copper and 0.03 percent of sulfur; after the smelting slag is treated by a CR furnace (reduction fuming and sedimentation), the copper content of the slag is 0.5 percent, and the zinc content of the slag is 0.34 percent. The copper recovery rate of the whole system is about 98.7 percent, and the zinc recovery rate is about 75 percent.

Example 8

The processing method is the same as that of the embodiment 1, except that:

a copper making furnace: the flux is quartz stone, and the addition amount of the flux is 20% of the total weight of the first copper matte; the oxidant is oxygen-enriched air with oxygen volume content of 25 percent, and the addition amount of the oxidant is 140 Nm/ton of the first copper matte ³O ₂(ii) a The reducing agent is pulverized coal; does not sprayAdding water mist without adding cold materials;

and (3) processing results: 100 ten thousand tons of copper concentrate is treated every year, and the concentrate contains 20 percent of copper and 2 percent of zinc; smelting to produce 25 ten thousand tons of copper matte with 75 percent of copper, 65 ten thousand tons of smelting slag with 3 percent of copper and 2.77 percent of zinc in the smelting slag; the copper making furnace produces 18.2 ten thousand tons of anode copper, 97.6 percent of copper and 0.12 percent of sulfur; the smelting slag contains 0.41% of copper after reduction and dilution (reduction fuming and sedimentation) and 0.50% of zinc. The copper recovery rate of the whole system is about 95 percent, and the zinc recovery rate is about 70 percent.

Example 9

The processing method is the same as that of the embodiment 1, except that:

a CR furnace: reducing and fuming, and then settling; in the step of reduction fuming treatment, the reaction temperature is 1350 ℃; the reducing agent is pulverized coal, and the adding amount of the reducing agent is 10 percent of the total weight of the smelting slag; a small amount of oxygen is introduced to provide heat; adding pyrite serving as a vulcanizing agent to produce low-grade copper matte; and introducing sulfur dioxide gas into the settling chamber, and returning the obtained low-grade copper matte to the smelting furnace.

And (3) processing results: 100 ten thousand tons of copper concentrate is treated every year, and the concentrate contains 20 percent of copper and 2 percent of zinc; smelting to produce 25 ten thousand tons of copper matte with 75 percent of copper, 65 ten thousand tons of smelting slag with 3 percent of copper and 2.77 percent of zinc in the smelting slag; the copper making furnace produces 23.5 ten thousand tons of anode copper, 99.3 percent of copper and 0.05 percent of sulfur; after the smelting slag is treated by a CR furnace (reduction fuming and sedimentation), the copper content of the slag is 0.1 percent, and the zinc content of the slag is 0.19 percent. The copper recovery rate of the whole system is about 99 percent, and the zinc recovery rate is about 85 percent.

Example 10

The processing method is the same as that of the embodiment 1, except that:

a CR furnace: firstly settling and then reducing and fuming; in the step of reduction fuming treatment, the reaction temperature is 1350 ℃; the reducing agent is pulverized coal, and the adding amount of the reducing agent is 10 percent of the total weight of the smelting slag; a small amount of oxygen is introduced to provide heat; and the sedimentation cavity is used for carrying out electrode heat compensation.

And (3) processing results: 100 ten thousand tons of copper concentrate is treated every year, and the concentrate contains 20 percent of copper and 2 percent of zinc; smelting to produce 25 ten thousand tons of copper matte, 72 percent of copper, 63 ten thousand tons of smelting slag, 3.5 percent of copper and 2.63 percent of zinc in the smelting slag; the copper making furnace produces 24 ten thousand tons of anode copper, 99.3 percent of copper and 0.05 percent of sulfur; after the smelting slag is treated by a CR furnace (reduction fuming and sedimentation), the copper content of the slag is 0.6 percent, and the zinc content of the slag is 0.54 percent. The copper recovery rate of the whole system is about 98.5 percent, and the zinc recovery rate is about 68 percent.

From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:

adopt the utility model provides a copper smelting system, annual handling capacity is big, and positive pole copper (the copper product that indicates purity can reach electrolysis positive pole copper) is output greatly, and the valuable metal rate of recovery is higher. In particular, as can be seen from the data in examples 1 and 5 to 8, compared with the technical solution in example 8 in which no cold charge is added to the copper making furnace or no water mist is sprayed, the method of adding cold charge to the copper making furnace and spraying water mist is adopted in examples 1, 5 to 7, so that the oxygen content of the oxidant in the copper making reaction is greatly increased, the copper making reaction can be completed under the condition of high oxygen-rich concentration without overheating, and the copper-sulfur yield efficiency and the copper content of the anode copper are effectively increased. Certainly, though not adding the cold burden and spouting into the water smoke in making the copper stove, the utility model discloses technical scheme in 8 adopts short flow copper smelting technology effectively to retrieve the valuable metal in the smelting slag equally, has directly produced the positive pole copper simultaneously and has made harmless sediment, also belongs to the utility model discloses a scope of protection.

In a word, the utility model discloses a valuable metal in the smelting slag has effectively been retrieved in the smelting process to reduction fuming and subside, has realized resource recovery, has alleviateed environmental pollution. In addition, the utility model takes the smelting furnace as the core, shortens simultaneously from the product end and the slag end, and greatly simplifies the copper smelting process. The initial estimation is carried out, the average zinc content in the slag is calculated according to 3%, the recovery rate is calculated according to 80%, 20 ten thousand t/a copper smelting enterprises can recover 1.9 ten thousand t/a zinc, the economic benefit of the enterprises is greatly improved, the process flow of slag treatment is greatly simplified, the occupied area is greatly reduced, and the potential pollution risk of slag tailings is also solved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A short-process copper smelting system is characterized by comprising:

a smelting furnace (10) for smelting the copper concentrate to produce a first copper matte and smelting slag; the smelting furnace (10) is provided with a first copper matte outlet and a smelting slag outlet;

the copper making furnace (20), the copper making furnace (20) is provided with a copper matte inlet and a copper making slag outlet, the copper matte inlet is communicated with the first copper matte outlet through a first launder, and the copper making furnace (20) is used for carrying out copper making reaction on the first copper matte to generate anode copper and copper making slag; and

the CR furnace (30) is provided with a smelting slag inlet, the smelting slag inlet is communicated with the smelting slag outlet through a second launder, and the CR furnace (30) is used for reducing, fuming and settling the smelting slag to recover valuable metals in the smelting slag and produce harmless slag;

the copper making system further comprises cooling equipment, wherein the cooling equipment is used for cooling the copper making furnace (20), and the cooling equipment is a negative pressure water jacket device or a water spray cooling device used for spraying water mist into the copper making furnace (20);

wherein, the copper making furnaces (20) are arranged in parallel, and the CR furnace (30) is one; or one copper making furnace (20) is provided, and two CR furnaces (30) are arranged in parallel; or the two copper making furnaces (20) are arranged in parallel, and the two CR furnaces (30) are also arranged in parallel;

the CR furnace (30) is an integrated recovery furnace and comprises a cavity, the cavity comprises a reduction fuming cavity (31) and a sedimentation cavity (32) which are communicated, the reduction fuming cavity (31) is communicated with the smelting slag outlet and is used for carrying out reduction fuming treatment on the smelting slag, and a flue gas outlet is formed in the reduction fuming cavity (31); the settling chamber (32) is used for settling the reducing slag generated after the reduction fuming treatment, and the settling chamber (32) is provided with a second copper matte outlet and a harmless slag outlet; or the CR furnace (30) comprises a cavity, the cavity comprises a reduction fuming cavity (31) and a settling cavity (32) which are communicated, the settling cavity (32) is communicated with the smelting slag outlet and is used for settling the smelting slag, and the settling cavity (32) is provided with a second copper matte outlet; the reduction fuming cavity (31) is used for carrying out reduction fuming treatment on the sedimentation slag generated after the sedimentation treatment, and a flue gas outlet and a harmless slag outlet are formed in the reduction fuming cavity (31); the cavity is further provided with a partition wall (33) so as to divide the cavity into the reduction fuming cavity (31) and the sedimentation cavity (32), the reduction fuming cavity (31) and the sedimentation cavity (32) are respectively positioned at two sides of the partition wall (33) along the horizontal direction, a communication channel of the reduction fuming cavity (31) and the sedimentation cavity (32) is arranged close to the bottom of the cavity, and the partition wall (33) is a water-cooling partition wall; the reduction fuming cavity (31) is further provided with a second spray gun and a feed inlet, the second spray gun is arranged on the side portion of the reduction fuming cavity (31) and used for adding a reducing agent into the reduction fuming cavity (31), and the feed inlet is arranged at the top portion of the reduction fuming cavity (31) and used for adding a trapping agent into the reduction fuming cavity (31); the sedimentation chamber (32) is further provided with a heat supply device, and the heat supply device is used for keeping warm or raising the temperature of the sedimentation chamber (32), the heat supply device is an immersed combustion nozzle or an electrode, and the number of the electrodes is 3-6.

2. A short flow copper smelting system according to claim 1, characterized in that the smelting furnace (10) is a bottom-blowing smelting furnace or a side-blowing smelting furnace.

3. A short copper smelter system according to claim 1, characterized in that the smelting furnace (10) is provided with a copper slag making inlet for passing the cooled copper slag into the smelting furnace (10).

4. A short run copper metallurgy system according to any one of claims 1 to 3, wherein the copper making furnace (20) is further provided with:

the first spray gun is arranged at the side part or the bottom part of the copper making furnace (20); and

and the flux inlet is used for introducing the flux.

5. A short process copper smelting system according to claim 4, wherein the furnace body of the copper smelting furnace (20) is a horizontal cylinder type furnace body.

6. A short copper run smelting system according to any one of claims 1 to 3, wherein the copper making furnace (20) is further provided with a cold charge inlet for adding one or more of electrolytic copper scrap, scrap copper and solid copper matte to the copper making furnace (20).

7. A short run copper metallurgy system according to any one of claims 1 to 3, wherein the copper making furnace (20) is further provided with an anode copper outlet; the short-process copper smelting system further comprises a casting device (40), wherein the casting device (40) is communicated with the anode copper outlet and is used for casting the anode copper.

8. The short run copper metallurgy system of claim 7, wherein the casting apparatus (40) is a twin disc caster.

9. A short copper smelting system according to claim 1, characterized in that the second copper matte outlet is arranged to discharge second copper sulphur, and the smelting furnace (10) is further provided with a second copper matte inlet for passing the cooled second copper sulphur into the smelting furnace (10).