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Method for extracting antimony metal

An extraction method, antimony metal technology, applied in the field of antimony metal extraction, can solve the problems of poor environmental protection, low recovery rate, high energy consumption, etc., and achieve the effects of solving poor environmental protection, improving smelting strength, and simplifying the reduction process

Active Publication Date: 2018-08-28
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, so as to solve the problems of poor environmental protection, high energy consumption and low recovery rate when using a blast furnace for reduction smelting in the existing extraction method of antimony metal

Method used

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  • Method for extracting antimony metal
  • Method for extracting antimony metal
  • Method for extracting antimony metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] First, by analyzing the antimony-containing materials that enter the furnace, according to the preferred smelting slag type, mix in 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 furnace), so that the Sb 2 S 3 is transformed into Sb 2 o 3 , get antimony oxide flue gas and volatile slag (type is FeO-SiO 2 -CaO, composed of 60wt% SiO 2 , 10wt% FeO, 15wt% CaO, and the rest are impurities), and the volatilization melting temperature is 1250°C.

[0069] The above-mentioned antimony oxide flue gas is gathered 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 finishing, the residual antimony content in the volatilized slag is only 0.12wt%.

[0070] Antimony oxide d...

Embodiment 2

[0072] First, by analyzing the antimony-containing materials that enter the furnace, according to the preferred smelting slag type, mix in 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 furnace), so that the Sb 2 S 3 is transformed into Sb 2 o 3 , to obtain antimony oxide flue gas and volatile slag, and the temperature of volatile smelting is 1250°C.

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

[0075] Anti...

Embodiment 3

[0077] The difference from Example 1 is: the volatilization melting temperature is 1350°C

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Abstract

The invention provides a method for extracting an antimony metal. The method comprises a step of performing reduction melting on antimony oxide dust so as to obtain the antimony metal, and in addition, the step of reduction melting is carried out in an electrothermal reduction device. Conventional reflection furnace reduction is replaced by an electrothermal reduction mode, so that on one hand, the thermal efficiency is greatly improved and the energy consumption is reduced, on the other hand, the melting intensity is greatly improved, the reduction process is simplified, and the number of reduction devices can be greatly reduced. Therefore, problems that a conventional reflection furnace reduction process is poor in environment protection, high in energy consumption, low in recycling rate, and the like, can be solved.

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, antimony metallurgical production is dominated by pyrometallurgical processes, accounting for more than 90%. At present, the basic process of most antimony smelters in this field is antimony concentrate blast furnace volatilization smelting-crude antimony trioxide reverberatory furnace reduction smelting. [0003] The 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, it is difficult to make acid and other disadvantages. At the same time, blast furnace waste slag contains high antimony, resulting in waste of resources. Blast furnaces cannot process low-grade antimony concentrates. The reverberatory furnace redu...

Claims

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Application Information

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IPC IPC(8): C22B30/02C22B4/08C22B4/04
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