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Extraction method for antimony metal

An extraction method, antimony metal technology, which is applied in the field of antimony metal extraction, can solve the problems of poor environmental protection, high energy consumption, and large flue gas volume, and achieve the effects of reducing slag volume, improving recovery rate, and reducing flue gas volume

Active Publication Date: 2018-11-02
CHINA ENFI ENGINEERING CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for extracting antimony metal to solve the problems of large amount of flue gas, poor environmental protection and high energy consumption in the volatilization process of the existing antimony smelting process

Method used

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  • Extraction method for antimony metal
  • Extraction method for antimony metal
  • Extraction method for antimony metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] First, by analyzing the antimony-containing materials into the furnace, according to the preferred smelting slag type, mix iron ore and limestone target slag type, 60wt% SiO 2 , 10wt% FeO, 15wt% CaO target slag type.

[0068] Secondly, the above-mentioned materials to be treated are volatilized and smelted in an electric heating volatilization device (the first electric heating furnace) to make Sb 2 S 3 It turns into Sb 2 O 3 , Get antimony oxide flue gas and volatilized slag (type FeO-SiO 2 -CaO, the composition is 60wt% SiO 2 , 10wt% FeO, 15wt% CaO, the rest are impurities), the smelting temperature is 1250°C.

[0069] The above-mentioned antimony oxide flue gas is collected in the waste heat recovery device, and after cooling to 800°C, it enters the dust collection device to obtain antimony oxide dust (powder Sb 2 O 3 ). After the end, the residual antimony content in the volatilized slag was only 0.12wt%.

[0070] According to the weight ratio of 100:1:5, the antimony oxid...

Embodiment 2

[0072] First, by analyzing the antimony-containing materials into the furnace, according to the preferred smelting slag type, mix iron ore and limestone target slag type, 60wt% SiO 2 , 10wt% FeO, 10wt% CaO target slag type.

[0073] Secondly, the above-mentioned materials to be treated are volatilized and smelted in an electric heating volatilization device (the first electric heating furnace) to make Sb 2 S 3 It turns into Sb 2 O 3 , Get antimony oxide flue gas and volatilized slag, the temperature of volatilization smelting is 1250℃.

[0074] The above-mentioned antimony oxide flue gas is collected in the waste heat recovery device, and after being cooled to 800°C, it enters the dust collector to obtain antimony oxide dust (powder Sb 2 O 3 ). At the same time, oxygen-enriched blowing (oxygen blowing) is performed on the above-mentioned volatile slag. After the completion, the residual antimony content in the volatile slag is only 0.18 wt%.

[0075] According to the weight ratio of ...

Embodiment 3

[0077] The difference from Example 1 is: the temperature of volatilization smelting is 1350℃

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Abstract

The invention provides an extraction method for antimony metal. The extraction method comprises the step that volatilization smelting is conducted on antimony-containing materials. The volatilizationsmelting step is conducted in an electric heating volatilization device. Volatilization smelting is conducted on the antimony-containing materials in an electric heating mode. Air blasting and fuel burning are not needed in the whole volatilization smelting process, thus the smoke quantity can be lowered greatly, and then the concentration of SO2 in smoke can be increased greatly. The produced high-concentration SO2 smoke can be recycled through acid making, and thus the problems that in a traditional blast furnace volatilization process, low-concentration SO2 cannot be recycled, and consequently pollution occurs are solved. Meanwhile electric heating efficiency is high, and the molten state of slag can be always kept during fluctuation of the type of the slag. The use quantity of matchedflux can be reduced, the slag quantity is reduced, the high volatilization rate of antimony sulfide and antimony oxide can also be increased, and thus environmental protection, energy conservation, increase of the recycle rate and other comprehensive benefits are achieved.

Description

Technical field [0001] The invention relates to the field of metal smelting, in particular to a method for extracting antimony metal. Background technique [0002] Antimony smelting is divided into fire method and wet method. At present, pyrometallurgical processes are mainly used in the production of antimony metallurgy, reaching more than 90%. At present, the basic process of most antimony smelters in this field is blast furnace volatilization smelting of antimony concentrate-crude antimony trioxide reduction smelting in reverberatory furnace. [0003] Antimony blast furnace volatilization smelting process has poor environmental protection, high energy consumption, large flue gas volume, and SO in flue gas 2 The content is low and it is difficult to make acid. At the same time, the blast furnace waste slag contains high antimony, causing a waste of resources. The blast furnace cannot process low-grade antimony concentrate. The reverberatory furnace reduction process also has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B30/02C22B5/16
CPCC22B4/04C22B4/08C22B5/16C22B30/02Y02P10/20
Inventor 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
Owner CHINA ENFI ENGINEERING CORPORATION
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