CN211057203U - Well type extraction system for antimony metal - Google Patents
Well type extraction system for antimony metal Download PDFInfo
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- CN211057203U CN211057203U CN201820793534.8U CN201820793534U CN211057203U CN 211057203 U CN211057203 U CN 211057203U CN 201820793534 U CN201820793534 U CN 201820793534U CN 211057203 U CN211057203 U CN 211057203U
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Abstract
The utility model provides a well formula extraction system of antimony metal. The well type extraction system comprises a well type volatilization furnace, a heat exchange device and an electric heating reduction device. The well type volatilization furnace is provided with a feeding port and an antimony-containing flue gas outlet, the feeding port is used for adding raw materials required in the electric heating volatilization process, the raw materials comprise antimony-containing materials, the heat exchange device is provided with an antimony-containing flue gas inlet and an antimony-containing dust outlet, and the antimony-containing flue gas inlet is communicated with the antimony-containing flue gas outlet; the electric heating reduction device is provided with an antimony-containing dust inlet which is communicated with an antimony-containing dust outlet. Compared with the existing extraction device for antimony metal, the combination use of the well-type volatilization furnace, the heat exchange device and the electrothermal reduction device as the antimony metal extraction system is beneficial to improving the environmental protection property of the antimony metal extraction system, reducing the energy consumption of the system and improving the recovery rate of antimony element.
Description
Technical Field
The utility model relates to a metal smelting field particularly, relates to a well 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 waste. 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 discloses a main aim at provides a well formula extraction system of antimony metal to there is the low and poor problem of feature of environmental protection of antimony metal rate of recovery in the metallurgical process of solving current antimony-containing material.
In order to achieve the purpose, the utility model provides a well type extraction system of antimony metal, which comprises a well type volatilization furnace, wherein the well type volatilization furnace is provided with a feed inlet and an antimony-containing smoke outlet, the feed inlet is used for adding raw materials required in the electric heating volatilization process, and the raw materials comprise antimony-containing materials; 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, and the heat exchange device is used for cooling the antimony-containing flue gas; and the electric heating reduction device is provided with an antimony-containing dust inlet which is communicated with the antimony-containing dust outlet.
Further, the antimony-containing material supply device is provided with an antimony-containing material supply port, and the feeding port is communicated with the antimony-containing material supply port through an antimony-containing material flow channel;
further, the charge door includes first charge door, and first charge door setting is at the top of well formula stove of volatilizing, 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 setting is on the lateral wall of well formula stove that volatilizees, and the second charge door passes through the second antimony-containing material circulation passageway intercommunication with antimony-containing material supply opening, and well 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 well formula stove that volatilizees, and the second charge door passes through the circulation passageway intercommunication of the antimony-containing material with antimony-containing material supply opening, and well formula extraction system still includes drying device, and drying device sets up on the antimony-containing material circulation passageway of second.
Further, well 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 port, 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.
Further, drying device is provided with first exhanst gas outlet, and well formula extraction system still includes first dust collector, and first dust collector is provided with first flue gas inlet, and first flue gas inlet is linked together with first exhanst gas outlet.
Further, the drying device is a rotary kiln.
Furthermore, the side wall of the well type volatilization furnace is also provided with an air supply opening.
Furthermore, the side wall of the well type volatilization furnace is also provided with an injection inlet, the well 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 is used for injecting oxygen from the injection inlet.
Further, the well extraction system includes a blanketing agent supply device in communication with the electro-thermal reduction device.
Furthermore, the well 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 well type extraction system further comprises a third dust collection device, the third dust collection device is provided with a third flue gas inlet, the electric heating 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.
Use the technical scheme of the utility model, adopt the electric heat reduction device to replace traditional reverberatory furnace reduction, can improve the thermal efficiency greatly, reduce the energy consumption, improve simultaneously greatly and smelt intensity, simplify the reduction process, the quantity of the reduction device that significantly reduces. 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. Compared with the existing extraction device for antimony metal, the combination use of the well-type volatilization furnace, the heat exchange device and the electrothermal reduction device as the antimony metal extraction system is beneficial to improving the environmental protection property of the antimony metal extraction system, reducing the energy consumption of the system and improving the recovery rate of antimony element.
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 shows a schematic diagram of a well extraction system for antimony provided in accordance with an exemplary embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a well-type antimony element extraction system according to a preferred 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 shaft-type volatilization furnace; 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 a well-type extraction system for antimony metal, as shown in fig. 1, the well-type extraction system comprises a well-type volatilization furnace 20, a heat exchange device 30 and an electrothermal reduction device 40, wherein the well-type volatilization furnace 20 is provided with a feed inlet and an antimony-containing flue gas outlet 201, the feed inlet is used for adding raw materials required in the electrothermal volatilization process, the raw materials comprise antimony-containing materials, the heat exchange device 30 is provided with an antimony-containing flue gas inlet 301 and an antimony-containing dust outlet 302, and the antimony-containing flue gas inlet 301 is communicated with the antimony-containing flue gas outlet 201 and is used for cooling the antimony-containing flue gas; and the electric heating reduction device 40 is provided with an antimony-containing dust inlet 401, and the antimony-containing dust inlet 401 is communicated with the 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 well-type volatilizing furnace 20, the antimony sulfide and the antimony oxide can be volatilized into smoke. Meanwhile, the volatilized antimony sulfide is oxidized into antimony oxide in the upper space of the shaft-type volatilization furnace 20. And then conveying the antimony oxide discharged from the shaft-type volatilization furnace 20 to a dust collection 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.
The utility model discloses an electric heat reduction device 40 replaces traditional reverberatory furnace reduction, can the increasing the heat efficiency greatly, reduces the energy consumption, improves simultaneously greatly and smelts intensity, simplifies the reduction process, the quantity of the reduction device that significantly reduces. 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. Compared with the existing extraction device for antimony metal, the combination use of the well-type volatilization furnace 20, the heat exchange device 30 and the electrothermal reduction device 40 as an antimony metal extraction system is beneficial to improving the environmental protection property of the antimony metal extraction system, reducing the energy consumption of the system and improving the recovery rate of antimony element.
In a preferred embodiment, the antimony-containing material supply device 10 is provided with an antimony-containing material supply port 101, and the feed port is communicated with the antimony-containing material supply port 101 through an antimony-containing material flow passage. The antimony-containing material supply device 10 communicated with the well-type volatilization furnace 20 is beneficial to realizing the automation degree of the whole antimony metal well-type extraction system and reducing the labor intensity of operators.
Preferably, the bath area of shaft furnace 20 is provided with a slag discharge port from which slag from the volatilization smelting process is discharged and sold after water-breaking.
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 shaft volatilization furnace 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 feed opening 202 is arranged at the top of the well-type volatilization furnace 20, and the temperature of the top of the well-type volatilization furnace 20 is higher, so that the antimony-containing material is directly thrown down from the first feed opening 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 charging port comprises a second charging port 203, the second charging port 203 is provided on the side wall of the well volatilization furnace 20, the second charging port 203 is communicated with the antimony-containing material supply port 101 through a second antimony-containing material flow passage, the well extraction system further comprises a drying device 60, and the drying device 60 is provided on the second antimony-containing material flow passage.
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 charging ports comprise a first charging port 202 and a second charging port 203, the second charging port 203 is arranged on the side wall of the well-type volatilization furnace 20, the second charging port 203 is communicated with the antimony-containing material supply port 101 through a second antimony-containing material flow passage, the first charging port 202 is arranged on the top of the well-type volatilization furnace 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, and the well-type extraction system further comprises a drying device 60, and the drying device 60 is arranged on the second antimony-containing material flow passage. In the above well-type extraction system, at least part of the antimony-containing material is dried by the drying device 60, and then fed into the well-type volatilization furnace 20 through the second feeding port 203, and the rest antimony-containing material is fed into the well-type volatilization furnace 20 through the first feeding port 202 for volatilization smelting.
In a preferred embodiment, as shown in fig. 1, the above-mentioned well type extraction system further comprises a crushing and screening device 50, 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 well 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 well extraction system includes a flux supply device in communication with the first and second feed ports, respectively.
In a preferred embodiment, as shown in fig. 1, the side walls of the shaft furnace 20 are also provided with tuyeres. The top of the shaft-type volatilization furnace 20 is provided with a blast port which can timely supplement oxygen required by the oxidation process of the antimony sulfide, thereby being beneficial to improving the conversion rate of converting the antimony sulfide into the antimony oxide and improving the recovery rate of antimony elements.
In a preferred embodiment, as shown in fig. 1, the side wall of the shaft-type volatilization furnace 20 is further provided with an injection inlet 204, the shaft-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.
And stopping feeding when the volatile slag in the well type volatilization furnace 20 is accumulated to a preset height, carrying out slag discharging operation, and carrying out water quenching on the slag to form water-quenched slag. Then, the spraying device 22 is started, and oxygen-enriched air is blown into the well-type volatilization furnace 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 well extraction system includes a blanketing agent supply 41, the blanketing agent supply 41 being in communication with the electro-thermal reduction device 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 well-type 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 well-type extraction system further includes a third dust collecting device 90, the third dust collecting device 90 is provided with a third flue gas inlet, the electrothermal 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 composition of the antimony-containing material in example 1 and comparative example 1 is 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 furnace2Mesh of 10 wt% FeO, 15 wt% CaOAnd marking slag.
Secondly, the materials to be treated are volatilized and smelted in an electric heating volatilization device (a well type volatilization 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 SiO 210 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 was only 1 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 (electrothermal reduction 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 88 wt%.
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 in a reverberatory furnace to obtain metal antimony, wherein the reduction smelting temperature is 1150 ℃. The extraction rate of metallic antimony was 80 wt%.
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 (11)
1. A well extraction system of antimony metal, comprising:
the well type volatilization furnace (20), the well type volatilization furnace (20) is provided with a feed inlet and an antimony-containing smoke outlet (201), the feed inlet is used for adding raw materials required in the electric heating volatilization process, and the raw materials comprise antimony-containing materials;
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), and the heat exchange device is used for cooling antimony-containing flue gas; and
the electric heating reduction device (40), the electric heating reduction device (40) is provided with an antimony-containing dust inlet (401), and the antimony-containing dust inlet (401) is communicated with the antimony-containing dust outlet (302); the side wall of the well-type volatilization furnace (20) is also provided with an air supply port; the side wall of the shaft-type volatilization furnace (20) is further provided with an injection inlet (204), the shaft-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) and used for injecting oxygen from the injection inlet (204).
2. A well extraction system according to claim 1, characterized in that the well extraction system comprises an antimony containing material supply (10), the antimony containing material supply (10) being provided with an antimony containing material supply opening (101), the supply opening communicating with the antimony containing material supply opening (101) through an antimony containing material flow channel.
3. The well extraction system according to claim 2, characterized in that the feeding port comprises a first feeding port (202), the first feeding port (202) is arranged at the top of the well volatilization furnace (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.
4. The well extraction system according to claim 2, characterized in that the feeding port comprises a second feeding port (203), the second feeding port (203) is arranged on the side wall of the well volatilization furnace (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 well 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 well extraction system according to claim 3, characterized in that the feed opening further comprises a second feed opening (203), the second feed opening (203) is arranged on the side wall of the well volatilization furnace (20), the second feed opening (203) is communicated with the antimony-containing material supply opening (101) through a second antimony-containing material flow passage,
the well type extraction system also comprises a drying device (60), and the drying device (60) is arranged on the second antimony-containing material flow channel.
6. The well extraction system according to claim 5, further comprising 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 communicated with the first feeding port (202) and the second feeding port (203), respectively, and the drying device (60) is arranged on a flow path between the screened material outlet and the second feeding port (203).
7. The well extraction system according to claim 6, characterized in that the drying device (60) is provided with a first flue gas outlet, the well 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.
8. Well extraction system according to any of claims 4 to 7, characterized in that the drying device (60) is a rotary kiln.
9. A well extraction system according to claim 1, characterized in that it comprises a blanketing agent supply device (41), said blanketing agent supply device (41) being in communication with the electro-thermal reduction device (40).
10. The well extraction system according to claim 1, further comprising a second dust collection device (80), wherein the second dust collection device (80) is provided with a second flue gas inlet, the heat exchange 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.
11. The well extraction system according to claim 1, further comprising a third dust collection device (90), wherein the third dust collection 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.
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