CN211057204U - Electric heating reduction type extraction system for antimony metal - Google Patents

Electric heating reduction type extraction system for antimony metal Download PDF

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Publication number
CN211057204U
CN211057204U CN201820798481.9U CN201820798481U CN211057204U CN 211057204 U CN211057204 U CN 211057204U CN 201820798481 U CN201820798481 U CN 201820798481U CN 211057204 U CN211057204 U CN 211057204U
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antimony
reduction
flue gas
electro
inlet
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李东波
邓卫华
陆志方
金贵忠
蒋继穆
廖光荣
尉克俭
梁俊杰
刘诚
李志强
黎敏
刘放云
茹洪顺
龚福保
杨晓华
周立坤
王忠实
邓兆磊
吴卫国
陈学刚
冯双杰
曹珂菲
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HSIKWANG SHAN TWINKLING STAR CO Ltd
China ENFI Engineering Corp
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HSIKWANG SHAN TWINKLING STAR CO Ltd
China ENFI Engineering Corp
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Abstract

The utility model provides an electric heating reduction type extraction system for antimony metal. The electro-thermal reduction type extraction system comprises an electro-thermal reduction device, and the electro-thermal reduction device is provided with an antimony-containing dust inlet. The electric heating reduction device is adopted to replace the traditional reverberatory furnace reduction device, so that on one hand, the heat efficiency can be greatly improved, and the energy consumption is reduced; on the other hand, the smelting intensity can be greatly improved, the reduction process is simplified, and the number of reduction devices is greatly reduced. Therefore, the problems of poor environmental protection, high energy consumption, low recovery rate and the like in the traditional reverberatory furnace reduction process can be solved.

Description

Electric heating reduction type extraction system for antimony metal
Technical Field
The utility model relates to a metal smelting field particularly, relates to an electric heat reduction formula extraction system of antimony metal.
Background
Antimony smelting is divided into a pyrogenic process and a wet process. At present, the pyrometallurgical process is mainly used in the metallurgical production of antimony, and the content of the antimony reaches more than 90 percent. The basic process of most antimony smelting plants in the field at present is antimony concentrate blast furnace volatilization smelting-crude antimony trioxide reverberatory furnace reduction smelting.
The antimony blast furnace volatilization smelting process has the defects of poor environmental protection, high energy consumption, large flue gas amount and SO in the flue gas2Low content, difficult acid preparation and the like. Meanwhile, the waste slag of the blast furnace has high antimony content, which causes resource wasteAnd (4) charging. The blast furnace cannot process low-grade antimony concentrate. The reduction process of the reverberatory furnace also has the defects of poor labor condition, poor environmental protection, low production efficiency, high energy consumption, low direct yield and the like.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide an electric heating reduction type extraction system of antimony metal to solve the problems of poor environmental protection, high energy consumption and low recovery rate existing when a blast furnace is used for reduction smelting in the extraction method of antimony metal.
In order to achieve the above object, the present invention provides an electric heating reduction type extraction system for antimony metal, which comprises an electric heating reduction device, wherein the electric heating reduction device is provided with an antimony-containing dust inlet.
Furthermore, the electric heating reduction type extraction system also comprises an antimony-containing material supply device, a volatilization device and a heat exchange device, wherein the antimony-containing material supply device is provided with an antimony-containing material supply port; the volatilizing device is provided with a feed inlet and an antimony-containing flue gas outlet, and the feed inlet is communicated with an antimony-containing material supply port through an antimony-containing material flow channel; the heat exchange device is provided with an antimony-containing flue gas inlet and an antimony-containing dust outlet, the antimony-containing flue gas inlet is communicated with the antimony-containing flue gas outlet, the heat exchange device is used for cooling the antimony-containing flue gas, and the antimony-containing dust inlet is communicated with the antimony-containing dust outlet.
Further, the charge door includes first charge door, and first charge door setting is at the top of volatilizing the device, and first charge door and antimony-containing material supply port are through first antimony-containing material flow channel intercommunication.
Further, the charge door includes the second charge door, and the second charge door sets up on the lateral wall of device that volatilizees, and the second charge door passes through the circulation passageway intercommunication of the antimony-containing material with antimony-containing material supply port, and electric heat reduction formula extraction system still includes drying device, and drying device sets up on the second antimony-containing material circulation passageway.
Further, the charge door still includes the second charge door, and the second charge door setting is on the lateral wall of device that volatilizees, and the second charge door passes through second antimony-containing material circulation passageway intercommunication with antimony-containing material supply port, and electric heat reduction formula extraction system still includes drying device, and drying device sets up on second antimony-containing material circulation passageway.
Furthermore, electric heat reduction formula extraction system still includes crushing and screening device, and crushing and screening device is provided with screening material entry and screening material export, and screening material entry is linked together with antimony-containing material supply mouth, and screening material export is linked together with first charge door and second charge door respectively, and drying device sets up on the flow path between screening material export and second charge door.
Furthermore, the drying device is provided with a first flue gas outlet, the electrothermal reduction type extraction system further comprises a first dust collecting device, the first dust collecting device is provided with a first flue gas inlet, and the first flue gas inlet is communicated with the first flue gas outlet.
Further, the drying device is a rotary kiln.
Further, the side wall of the volatilization device is also provided with an air supply opening.
Furthermore, the side wall of the volatilization device is also provided with an injection inlet, the electrothermal reduction type extraction system also comprises an oxygen supply device and an injection device, the injection device is communicated with the oxygen supply device through an oxygen supply pipeline, and the injection device is communicated with the injection inlet and used for injecting oxygen from the injection inlet.
Further, the electro-thermal reduction type extraction system comprises a covering agent supply device, and the covering agent supply device is communicated with the electro-thermal reduction device.
Further, the electric heating reduction type extraction system further comprises a second dust collection device, the second dust collection device is provided with a second flue gas inlet, the heat exchange device is further provided with a second flue gas outlet, and the second flue gas inlet is communicated with the second flue gas outlet.
Further, the electro-thermal reduction type extraction system further comprises a third dust collection device, the third dust collection device is provided with a third flue gas inlet, the electro-thermal reduction device is further provided with a third flue gas outlet, and the third flue gas inlet is communicated with the third flue gas outlet.
By applying the technical scheme of the utility model, in the electric heating reduction type extraction system of antimony metal provided by the application, an electric heating reduction device is adopted to replace a traditional reverberatory furnace reduction device, so that the heat efficiency can be greatly improved, and the energy consumption can be reduced; on the other hand, the smelting intensity can be greatly improved, the reduction process is simplified, and the number of reduction devices is greatly reduced. Therefore, the problems of poor environmental protection, high energy consumption, low recovery rate and the like in the traditional reverberatory furnace reduction process can be solved.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view illustrating an electro-thermal reduction type antimony extraction system according to an exemplary embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a supply of antimony-containing material; 101. an antimony-containing material supply port; 20. a volatilization device; 21. an oxygen supply device; 22. an injection device; 201. an antimony-containing flue gas outlet; 202. a first feed inlet; 203. a second feed inlet; 204. an injection inlet; 30. a heat exchange device; 301. an antimony-containing flue gas inlet; 302. an antimony-containing dust outlet; 40. an electrothermal reduction device; 401. an antimony-containing dust inlet; 41. a covering agent supply device; 50. a crushing and screening device; 60. a drying device; 70. a first dust collecting device; 80. a second dust collecting device; 90. and a third dust collecting device.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
As described in the background art, the existing metallurgy process of antimony-containing materials has the problems of low direct yield of antimony element metal extraction and poor environmental protection. In order to solve the technical problem, the application provides an electric heating reduction type extraction system of antimony metal, which comprises an electric heating reduction device, wherein the electric heating reduction device is provided with an antimony-containing dust inlet.
In the electric heating reduction type extraction system for antimony metal, an electric heating reduction device is adopted to replace a traditional reverberatory furnace reduction device, so that on one hand, the heat efficiency can be greatly improved, and the energy consumption is reduced; on the other hand, the smelting intensity can be greatly improved, the reduction process is simplified, and the number of reduction devices is greatly reduced. Therefore, the problems of poor environmental protection, high energy consumption, low recovery rate and the like in the traditional reverberatory furnace reduction process can be solved.
In a preferred embodiment, as shown in FIG. 1, the electro-thermal reduction-type extraction system comprises: antimony-containing material supply device 10, volatilize device 20 and heat transfer device 30, antimony-containing material supply device 10 is provided with antimony-containing material supply port 101, volatilize device 20 and be provided with charge door and antimony-containing flue gas outlet 201, the charge door passes through first antimony-containing material circulation passageway intercommunication with antimony-containing material supply port 101, heat transfer device 30 is provided with antimony-containing flue gas entry 301 and antimony-containing dust outlet 302, antimony-containing flue gas entry 301 is linked together with antimony-containing flue gas outlet 201 for cooling the antimony-containing flue gas, antimony-containing dust entry 401 is linked together with antimony-containing dust outlet 302.
Typically, a certain amount of antimony oxide will be present in the antimony-containing material, which may be present as a major constituent or in the form of impurities.
Due to the fact that the antimony sulfide and the antimony oxide are high in volatility, when the antimony-containing material is smelted in the volatilizing device, the antimony sulfide and the antimony oxide can be volatilized into flue gas. And simultaneously, the volatilized antimony sulfide is oxidized into antimony oxide in the upper space of the volatilization device. And conveying the antimony oxide discharged from the volatilizing device to a dust collecting device for collection to obtain antimony oxide dust. And finally, conveying the antimony oxide dust to an electrothermal reduction device for reduction smelting to obtain the metal antimony.
Before reduction smelting is carried out by using an electrothermal reduction device, antimony-containing materials can be converted into antimony oxide dust by using a volatilization method (device) commonly used in the field. Such as volatilization device 20 including a molten bath melting device, a blast volatilization furnace, a shaft volatilization furnace, etc.
More preferably, the volatilizing device 20 is an electrically heated volatilizing device, such as an electric heating furnace.
In the electric heat reduction formula extraction system of antimony metal that this application provided, adopt the electrical heating device that volatilizees to volatilize the smelting to the antimony-containing material, whole volatilizing and smelting process need not blast air combustion fuel, and this can greatly reduced flue gas volume, and then can improve SO in the flue gas greatly2The concentration of (c). High concentration SO produced2The flue gas can be recovered by acid making, thereby solving the problem of low concentration SO in the traditional blast furnace volatilization process2The pollution problem caused by the failure of recovery. Meanwhile, the electric heating efficiency is high, and the molten state of the slag can be always kept when the slag type of the slag fluctuates. The method can reduce the dosage of the added flux, reduce the amount of slag, and is beneficial to improving the high volatilization rate of antimony sulfide and antimony oxide, thereby realizing the comprehensive benefits of environmental protection, energy conservation, improvement of recovery rate and the like.
Preferably, the bath area of the volatilization device 20 is provided with a slag discharge port from which slag produced by the volatilization smelting process is discharged and sold after water shredding.
Preferably, the heat exchanger 30 is a waste heat boiler. And in the heat exchange process, after the antimony-containing flue gas is conveyed to the ascending flue, the antimony-containing flue gas passes through the convection area of the waste heat boiler and is cooled, and antimony-containing dust is obtained. Preferably, the electrothermic reduction apparatus 40 is an electrothermic reduction furnace.
Preferably, the bath area of the electro-thermal reduction apparatus 40 is provided with a slag discharge port from which slag produced during the reduction smelting process is discharged for sale after water-crushing.
In a preferred embodiment, as shown in FIG. 1, the charging port comprises a first charging port 202, the first charging port 202 is provided at the top of the volatilization device 20, and the first charging port 202 is communicated with the antimony-containing material supply port 101 through a first antimony-containing material flow passage. The first feeding port 202 is arranged at the top of the volatilizing device 20, and the temperature of the top of the volatilizing device 20 is higher, so that the antimony-containing material is directly thrown down from the first feeding port 202, and the antimony-containing material can be dried in the falling process, thereby being beneficial to shortening the process flow.
In a preferred embodiment, as shown in FIG. 1, the feeding port comprises a second feeding port 203, the second feeding port 203 is provided on a side wall of the volatilizing device 20, the second feeding port 203 is communicated with the antimony-containing material supply port 101 through a second antimony-containing material flow path, the electro-thermal reduction type extraction system further comprises a drying device 60, and the drying device 60 is provided on the second antimony-containing material flow path.
It should be noted that the drying device and the second charging opening may or may not be connected. When the two are not communicated, the material obtained after drying by the drying device can be added into the second feeding port by means of manual or external tools.
In a preferred embodiment, as shown in FIG. 1, the feeding ports comprise a first feeding port 202 and a second feeding port 203, the second feeding port 203 is provided on the side wall of the volatilizing apparatus 20, the second feeding port 203 is communicated with the antimony-containing material supply port 101 through a second antimony-containing material flow passage, the first feeding port 202 is provided at the top of the volatilizing apparatus 20, and the first feeding port 202 is communicated with the antimony-containing material supply port 101 through a first antimony-containing material flow passage, while the electro-thermal reduction type extraction system further comprises a drying apparatus 60, and the drying apparatus 60 is provided on the second antimony-containing material flow passage. In the above-mentioned electro-thermal reduction type extraction system, at least part of the antimony-containing material is dried by the drying device 60, and then added into the volatilization device 20 from the second feed opening 203, and the rest antimony-containing material is added into the volatilization device 20 from the first feed opening 202 for volatilization smelting.
In a preferred embodiment, as shown in fig. 1, the above-mentioned electro-thermal reduction type extraction system further comprises a crushing and screening device 50, wherein the crushing and screening device 50 is provided with a screened material inlet and a screened material outlet, the screened material inlet is communicated with the antimony-containing material supply port 101, the screened material outlet is respectively communicated with the first feeding port 202 and the second feeding port 203, and the drying device 60 is arranged on a flow path between the screened material outlet and the second feeding port 203.
Set up crushing and screening device 50 and can carry out the breakage with containing antimony material, improve the reaction area who volatilizees and smelt containing antimony material in-process to improve antimony element's volatility, and then improve antimony element's rate of recovery.
In a preferred embodiment, as shown in fig. 1, the drying device 60 is provided with a first flue gas outlet, the electro-thermal reduction type extraction system further comprises a first dust collecting device 70, the first dust collecting device 70 is provided with a first flue gas inlet, and the first flue gas inlet is communicated with the first flue gas outlet. As a small part of antimony element inevitably enters the flue gas in a gaseous state and is lost in the drying process, the first dust collecting device 70 can be used for recovering the antimony element lost in the flue gas so as to facilitate the subsequent reduction smelting treatment.
In a preferred embodiment, the drying apparatus 60 is a rotary kiln.
In a preferred embodiment, the electro-thermal reduction-type extraction system comprises a flux supply device, and the flux supply device is respectively communicated with the first feeding port and the second feeding port.
In a preferred embodiment, as shown in fig. 1, the side wall of the volatilization device 20 is further provided with a blast opening. The top of the volatilizing device 20 is provided with a blast port which can timely supplement oxygen required in the oxidation process of antimony sulfide, thereby being beneficial to improving the conversion rate of converting antimony sulfide into antimony oxide and improving the recovery rate of antimony element.
In a preferred embodiment, as shown in fig. 1, the sidewall of the volatilization device 20 is further provided with an injection inlet 204, the electro-thermal reduction type extraction system further comprises an oxygen supply device 21 and an injection device 22, the injection device 22 is communicated with the oxygen supply device 21 through an oxygen supply pipeline, and the injection device 22 is communicated with the injection inlet 204 to inject oxygen from the injection inlet 204.
When the volatile slag in the volatilization device 20 is accumulated to a preset height, the charging is stopped, the slag discharging operation is carried out, and the slag is quenched by water to form water-quenched slag. Then, the spraying device 22 is started, and oxygen-enriched air is blown into the volatilizing device 20 to perform oxygen blowing operation on the antimony matte. The oxygen blowing operation is carried out on the slag, which is beneficial to further oxidizing and volatilizing the antimony metal in the slag, thereby improving the recovery rate of the antimony element.
In a preferred embodiment, as shown in FIG. 1, the electroheat reduction extraction system includes a blanketing agent supply means 41, the blanketing agent supply means 41 being in communication with the electroheat reduction means 40. Because the antimony oxide is easy to volatilize, the addition of the covering agent in the reduction smelting process can reduce the volatilization loss of the antimony oxide, thereby being beneficial to improving the recovery rate of antimony metal.
In a preferred embodiment, as shown in fig. 1, the electro-thermal reduction extraction system further includes a second dust collecting device 80, the second dust collecting device 80 is provided with a second flue gas inlet, the heat exchanging device 30 is further provided with a second flue gas outlet, and the second flue gas inlet is communicated with the second flue gas outlet. In the heat exchange process, besides antimony-containing dust, a part of flue gas (second flue gas) can be formed, and part of antimony oxide can be taken away in the second flue gas. The second dust collecting device 80 is arranged to recover antimony metal lost in the second flue gas, so that subsequent reduction smelting treatment can be conveniently carried out.
In a preferred embodiment, as shown in fig. 1, the electro-thermal reduction type extraction system further comprises a third dust collecting device 90, the third dust collecting device 90 is provided with a third flue gas inlet, the electro-thermal reduction device 40 is further provided with a third flue gas outlet, and the third flue gas inlet is communicated with the third flue gas outlet.
Preferably, the top of the electrothermal reduction device is provided with a smoke outlet, and smoke generated in the smelting process is discharged from the smoke outlet and enters a subsequent process. Besides obtaining metallic antimony in the process of electrothermal reduction, a small part of antimony element also enters the flue gas (third flue gas) in a gaseous state to be lost. The antimony oxide lost in the third flue gas due to the introduction can be recovered by the second dust collecting device 80, so that the subsequent reduction smelting treatment can be conveniently performed.
Preferably, the antimony-containing dust inlet 401 is arranged at the top of the electro-thermal reduction device 40, and the reduction smelting process comprises the following steps: antimony oxide smoke dust, a flux and crushed coal are added into an electrothermal reduction device through the antimony-containing dust inlet 401 for reduction smelting to obtain crude antimony. The melting bath area of the electro-thermal reduction device is provided with a crude antimony discharging port, and crude antimony generated by smelting is discharged from the port and sent to the next procedure.
In order to further improve the purity of antimony element, preferably, liquid metal antimony (crude antimony) extracted in the reduction smelting process is transferred to a ladle furnace station for heating and temperature rise, arsenic and lead removal operation (refining process) is carried out when the temperature reaches the requirement, and a casting finished product is carried out after the refining process is finished.
The present application is described in further detail below with reference to specific examples, which should not be construed as limiting the scope of the invention as claimed.
The compositions of the antimony-containing materials in examples 1 to 13 and comparative example 1 are shown in Table 1.
TABLE 1
Example 1
First, iron ore and limestone target slag types, 60 wt% SiO, were dosed according to the preferred smelt slag type by analyzing the antimony containing material charged to the furnace210 wt% FeO, 15 wt% CaO.
Secondly, the material to be treated is volatilized and smelted in an electric heating volatilizing device (a first electric heating furnace) to ensure that Sb is volatilized2S3Then is converted into Sb2O3To obtain antimony oxide flue gas and volatile slag (type is FeO-SiO)2CaO, composition 60% by weight SiO210 wt% FeO, 15 wt% CaO and the balance of impurities), and the temperature of the volatilization smelting is 1250 ℃.
Collecting the antimony oxide flue gas in a waste heat recovery device, cooling to 800 ℃, and then feeding into a dust collection device to obtain antimony oxide dust (powder Sb)2O3). After the end, the residual antimony content in the volatilized slag is only 0.12 wt%.
Mixing antimony oxide powder with covering agent (Na) at a weight ratio of 100:1:52CO3) And reducing and smelting the reducing agent (coke) in an electrothermal reduction device (a second electrothermal furnace) to obtain metallic antimony and reduced slag (the type is FeO-SiO)2-CaO-Na2O, composition of 52 wt% SiO2、15wt%FeO、20wt%CaO、2%Na2O and the balance of impurities), the temperature of reduction melting was 1150 ℃. After the reduction smelting is finished, the yield of the metallic antimony reaches up to 90 wt%.
Example 2
First, iron ore and limestone target slag types, 60 wt% SiO, were dosed according to the preferred smelt slag type by analyzing the antimony containing material charged to the furnace210 wt% FeO, 10 wt% CaO.
Secondly, the material to be treated is volatilized and smelted in an electric heating volatilizing device (a first electric heating furnace) to ensure that Sb is volatilized2S3Then is converted into Sb2O3Obtaining antimony oxide flue gas and volatile slag, wherein the temperature of the volatile melting is 1250 ℃.
The antimony oxide smoke is gathered in a waste heat recovery device, cooled to 800 ℃, and then enters a dust collection device to obtain antimony oxide dust (powder Sb)2O3). Meanwhile, oxygen-enriched blowing (oxygen blowing) is carried out on the volatilized slag, and after the oxygen-enriched blowing is finished, the content of the residual antimony in the volatilized slag is only 0.18 wt%.
Mixing antimony oxide powder with covering agent (Na) at a weight ratio of 100:1:52CO3) And reducing and smelting the reducing agent (coke) in an electrothermal reduction device (a second electrothermal furnace) to obtain metallic antimony and reduced slag (the type is FeO-SiO)2-CaO-Na2O, composition of 52 wt% SiO2、15wt%FeO、20wt%CaO、2%Na2O and the balance of impurities), the temperature of reduction melting was 1150 ℃. After the reduction smelting is finished, the yield of the metallic antimony reaches 91 wt%.
Example 3
The differences from example 1 are: the temperature of volatilization smelting is 1350 DEG C
Example 4
The differences from example 1 are: the temperature of the volatilization smelting is 1100 DEG C
Example 5
The differences from example 1 are: in the reduction smelting process, the weight ratio of the reducing agent to the antimony oxide dust is 3: 100.
Example 6
The differences from example 1 are: in the reduction smelting process, the weight ratio of the covering agent to the antimony oxide dust is 8: 100.
Example 7
The differences from example 1 are: in the reduction smelting process, the weight ratio of the covering agent to the antimony oxide dust is 0.5: 100.
Example 8
The differences from example 1 are: during the reduction smelting, no covering agent is added.
Example 9
The differences from example 1 are: in the reduction smelting process, the type of the reduction slag is FeO-SiO2CaO, composition of 45 wt% SiO25 wt% FeO, 20 wt% CaO and the balance impurities.
Example 10
The differences from example 1 are: oxygen blowing is not performed on the volatilized slag. The content of antimony in the volatilized slag was 0.22 wt%.
Example 11
The differences from example 1 are: and during the reduction smelting process, granulating the antimony oxide dust.
Example 12
The differences from example 1 are: in the volatilization smelting process, the antimony-containing material is preheated to 400 ℃, and then the volatilization smelting process is carried out.
Example 13
The differences from example 1 are: the volatilization smelting device adopted in the volatilization smelting process is a well-type volatilization furnace.
Comparative example 1
And oxidizing and smelting the antimony sulfide ore and oxygen-enriched air in a blast furnace to obtain antimony-containing flue gas and molten slag, wherein the oxidizing and smelting temperature is 1250 ℃, and the content of antimony in the molten slag is 1 wt%.
And (3) carrying out reduction smelting on the antimony smoke dust to obtain metal antimony, wherein the extraction rate of the metal antimony is 80 wt%.
The residual antimony content and the extraction rate of metallic antimony in the volatilized slag in examples 1 to 13 and comparative example 1 are shown in Table 1.
TABLE 1
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
comparing examples 1 to 10 and comparative example 1, it can be seen that the extraction method provided by the present application is advantageous to greatly increase the extraction rate of antimony.
As is clear from comparison of examples 1, 3 and 4, limiting the temperature of the volatilization melting to the preferable range in the present application is advantageous in further reducing the residual amount of antimony element in the volatilized slag and in further improving the extraction rate of antimony metal.
Comparing examples 1 and 5, it is found that limiting the weight ratio of the reducing agent to the antimony oxide dust to the range preferable in the present application is advantageous in further improving the reduction rate of antimony element and further in improving the extraction rate of antimony metal.
It is understood from comparison of examples 1 and 6 to 8 that limiting the weight ratio of the covering agent to the antimony oxide dust to the preferable range in the present application is advantageous in further reducing the residual amount of antimony element in the volatilized slag and in further improving the extraction rate of antimony metal.
Comparing examples 1 and 9, it is found that limiting the type of slag to the preferred range of the present application is advantageous in further reducing the residual amount of antimony in the reduction slag, and in turn, in improving the extraction rate of antimony metal.
Comparing examples 1 and 10, it is found that oxygen blowing of the volatilized slag is advantageous in further reducing the residual amount of antimony element in the volatilized slag, and is further advantageous in improving the extraction rate of antimony metal.
Comparing examples 1 and 11, it is found that performing reduction smelting after granulating the antimony oxide dust is advantageous in further reducing the residual amount of antimony element in the reduction slag, and in turn, in improving the extraction rate of antimony metal.
Comparing examples 1 and 12, it can be seen that the preheating and the volatilization smelting of the antimony-containing material are beneficial to further reducing the residual amount of antimony in the volatilized slag, and further beneficial to improving the extraction rate of antimony metal.
Comparing examples 1 and 13, it is found that the reduction melting process using the electrothermal reduction melting apparatus is advantageous in further improving the extraction rate of antimony metal.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An electroheat reduction type extraction system of antimony metal, characterized in that the electroheat reduction type extraction system comprises:
the electric heating reduction device (40), the electric heating reduction device (40) is provided with an antimony-containing dust inlet (401);
the antimony-containing material supply device (10), wherein the antimony-containing material supply device (10) is provided with an antimony-containing material supply port (101);
the volatilization device (20), the volatilization device (20) is provided with a feed inlet and an antimony-containing smoke outlet (201), and the feed inlet is communicated with the antimony-containing material supply port (101) through an antimony-containing material flow channel;
the heat exchange device (30) is provided with an antimony-containing flue gas inlet (301) and an antimony-containing dust outlet (302), the antimony-containing flue gas inlet (301) is communicated with the antimony-containing flue gas outlet (201), the heat exchange device is used for cooling antimony-containing flue gas, and the antimony-containing dust inlet (401) is communicated with the antimony-containing dust outlet (302);
the second dust collecting device (80) is provided with a second flue gas inlet, the heat exchange device (30) is also provided with a second flue gas outlet, and the second flue gas inlet is communicated with the second flue gas outlet;
and the third dust collecting device (90) is provided with a third flue gas inlet, the electrothermal reduction device (40) is also provided with a third flue gas outlet, and the third flue gas inlet is communicated with the third flue gas outlet.
2. The electro-thermal reduction-type extraction system according to claim 1, wherein the feed port comprises a first feed port (202), the first feed port (202) is provided at the top of the volatilizing device (20), and the first feed port (202) is communicated with the antimony-containing material supply port (101) through a first antimony-containing material flow passage.
3. The electro-thermal reduction-type extraction system according to claim 1, wherein the feed port comprises a second feed port (203), the second feed port (203) is provided on a side wall of the volatilizing device (20), the second feed port (203) is communicated with the antimony-containing material supply port (101) through a second antimony-containing material flow passage,
the electric heating reduction type extraction system also comprises a drying device (60), and the drying device (60) is arranged on the second antimony-containing material flow channel.
4. The electro-thermal reduction-type extraction system according to claim 2, wherein the feed port further comprises a second feed port (203), the second feed port (203) is provided on a side wall of the volatilizing device (20), the second feed port (203) is communicated with the antimony-containing material supply port (101) through a second antimony-containing material flow passage,
the electric heating reduction type extraction system also comprises a drying device (60), and the drying device (60) is arranged on the second antimony-containing material flow channel.
5. The electrothermal reduction-type extraction system according to claim 4, further comprising a crushing and screening device (50), wherein the crushing and screening device (50) is provided with a screening material inlet and a screening material outlet, the screening material inlet is communicated with the antimony-containing material supply port (101), the screening material outlet is respectively communicated with the first feeding port (202) and the second feeding port (203), and the drying device (60) is arranged on a flow path between the screening material outlet and the second feeding port (203).
6. The electro-thermal reduction extraction system according to claim 5, wherein the drying device (60) is provided with a first flue gas outlet, the electro-thermal reduction extraction system further comprising a first dust collecting device (70), the first dust collecting device (70) being provided with a first flue gas inlet, and the first flue gas inlet being in communication with the first flue gas outlet.
7. An electro-thermal reduction-type extraction system according to any one of claims 3 to 6, characterized in that the drying device (60) is a rotary kiln.
8. Electro-thermal reduction-type extraction system according to any one of claims 1 to 6, characterized in that the side walls of the volatilization device (20) are further provided with air supply ports.
9. The electro-thermal reduction extraction system according to claim 8, wherein the sidewall of the volatilizing device (20) is further provided with an injection inlet (204), the electro-thermal reduction extraction system further comprises an oxygen supply device (21) and an injection device (22), the injection device (22) is communicated with the oxygen supply device (21) through an oxygen supply pipeline, and the injection device (22) is communicated with the injection inlet (204) for injecting oxygen from the injection inlet (204).
10. An electro-thermal reduction extraction system according to claim 1, comprising a blanketing agent supply device (41), the blanketing agent supply device (41) being in communication with the electro-thermal reduction device (40).
CN201820798481.9U 2017-12-26 2018-05-25 Electric heating reduction type extraction system for antimony metal Active CN211057204U (en)

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