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Method for producing antimony with antimony oxide powder

A technology for producing antimony with antimony oxygen powder, which is applied in the field of antimony production with antimony oxygen powder, which can solve the problems of low antimony direct yield, low production efficiency, environmental pollution, etc., and achieve the effects of low reduction smelting temperature, easy operation, and simple process

Active Publication Date: 2021-04-16
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the related technology, although the reverberatory furnace process is relatively simple to operate, coal is used as the reducing agent and heat source, and the reduction coal consumption is 140 kg / (ton · antimony), and the fuel coal consumption is 60 kg / (ton · antimony). Therefore, during the production process, there will be A lot of SO 2 , NOx and other harmful gases, causing environmental pollution
Moreover, in the traditional reverberatory furnace process, the antimony content in the slag is as high as 36% to 40%, and the direct antimony recovery rate is only 70%, and the production efficiency is low
[0007] Therefore, it is necessary to develop a new method of producing antimony metal from antimony oxygen powder to solve the problems of low antimony direct recovery rate and serious environmental pollution in the reverberatory furnace smelting process.

Method used

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  • Method for producing antimony with antimony oxide powder
  • Method for producing antimony with antimony oxide powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Take by weighing 100kg antimony oxide powder, add it in the fluidized bed reactor, pass into high-purity H then 2 , the flow rate is 30m 3 / min, the temperature in the fluidized bed reactor was raised to 550°C, and after 40 minutes of smelting, a metallized solid product including metal antimony and slag was obtained. Send the metallized solid product into an electric heating furnace, heat it to 1000°C for smelting, and the smelting time is 30 minutes to obtain crude antimony and slag.

[0052] The crude antimony obtained in the embodiment of the present invention contains 98.83% (mass) of antimony, and the direct yield of antimony is 82.15%; the antimony slag contains 11.65% (mass) of antimony.

Embodiment 2

[0054] Weigh 50kg of antimony oxide powder, put it into the powder gas reduction furnace, and then feed high-purity CO with a flow rate of 10m 3 / min, the temperature in the reduction furnace was raised to 570°C, and after 50 minutes of smelting, a metallized solid product including metal antimony and slag was obtained. Send the metallized solid product into an electromagnetic heating furnace, heat it to 1100°C for smelting, and the smelting time is 30 minutes to obtain crude antimony and slag.

[0055] The crude antimony obtained in the embodiment of the present invention contains 98.29% (mass) of antimony, and the direct yield of antimony is 81.04%; the antimony slag contains 11.92% (mass) of antimony.

Embodiment 3

[0057] Take by weighing 100kg antimony oxide powder, add it in the fluidized bed reactor, pass into H 2 and inert gas, wherein the flow rate of CO is 25m 3 / min, the flow rate of inert gas is 5m 3 / min, the temperature in the reduction furnace was raised to 500°C, and after smelting for 60 minutes, a metallized solid product including metal antimony and slag was obtained. Send the metallized solid product into an electromagnetic heating furnace, heat to 1060°C for smelting, and the smelting time is 30 minutes to obtain crude antimony and slag.

[0058] The crude antimony obtained in the embodiment of the present invention contains 98.21% (mass) of antimony, and the direct yield of antimony is 80.97%; the antimony slag contains 11.86% (mass) of antimony.

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Abstract

The invention discloses a method for producing antimony with antimony oxide powder. The method comprises the following steps of a. introducing a reducing gas into the antimony oxide powder, heating to carry out reduction reaction, and reducing the antimony oxide powder to metallic antimony to obtain a metallized solid product; and b, smelting the metallized solid product obtained in the step a to obtain crude antimony and slag. According to the method for producing the antimony with antimony oxide powder, gas is adopted as a reducing agent to reduce the antimony oxide powder, harmful gas such as SO2 and NOx is not generated in a production process, and the method is an environment-friendly smelting method and has a high antimony direct recovery rate.

Description

technical field [0001] The invention belongs to the technical field of antimony oxygen powder smelting, and in particular relates to a method for producing antimony from antimony oxygen powder. Background technique [0002] Antimony oxide powder is a powdery substance obtained by smelting antimony concentrate by blast furnace volatilization and oxidation process, and is an intermediate product in the process of producing antimony metal from antimony concentrate. At present, reverberatory furnace process is usually used to reduce antimony oxide powder to produce antimony metal. [0003] The main treatment process of antimony smelting by fire method is "blast furnace volatilization smelting-antimony oxygen powder reverberatory furnace reduction" process. In the process of reducing and smelting antimony oxide powder in the reverberatory furnace, the batching system mixes the coarse antimony oxide powder, reduced coal and flux in proportion, and then puts them into the reverber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B30/02C22B5/12C22B5/14
CPCY02P10/20
Inventor 马登李东波陈学刚邓兆磊裴忠冶
Owner CHINA ENFI ENGINEERING CORPORATION