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Production method for recovering antimony from antimonyoxychloride

A technology for antimony oxychloride slag and production method, which is applied in the direction of improving process efficiency and the like, can solve the problems of high impurity content in products, potential safety hazards and high production costs, and achieve high product purity, high antimony recovery rate and low cost. Effect

Active Publication Date: 2010-09-01
ZHUZHOU SMELTER GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a production method for reclaiming antimony from antimony oxychloride slag, which can solve the problems of complex process, high product impurity content, high production cost and hidden safety hazards in the prior art, and has the advantages of process Advantages of simplicity and low equipment cost

Method used

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Embodiment 1

[0027] A production method for recovering antimony from antimony oxychloride slag, which adopts the reduction smelting method to process the antimony oxychloride slag obtained from the treatment of lead anode slime in a certain factory, and its composition and content are the following components and weight percentages: Sb is 69.2 %, Pb is 0.8%, Cu is 0.21%, Bi is 0.31%, As is 1.2%, and Ag is 500g / T. According to the oven step of the present invention, first use wood as fuel to raise the temperature to 200°C within 48 hours and keep it for 72 hours, then use lignite as fuel to raise the furnace temperature to 350°C within 24 hours and keep it for 36 hours , and then use lignite to raise the furnace temperature to 600°C within 16 hours and maintain it for 24 hours, and finally raise the furnace temperature to 1250°C. Then carry out batching according to the ratio of antimony oxychloride slag, soda ash, lime, coke weight ratio being 100: 13.8: 2.0: 7.3, wherein the raw material ...

Embodiment 2

[0029] A production method for recovering antimony from antimony oxychloride slag, which adopts the reduction smelting method to process the antimony oxychloride slag obtained from the lead anode slime of a factory, and its composition and content are the following components and weight percentage: Sb69.2 %, Pb0.8%, Cu0.21%, Bi0.31%, As1.2%, Ag500g / T. According to the oven step of the present invention, first use wood as fuel to heat up to 200°C within 48 hours, and keep it for 72 hours, then use lean coal as fuel to heat up the furnace temperature to 350°C within 24 hours, and keep it at 36°C. hours, then use lean coal to raise the furnace temperature to 600°C in 16 hours and keep it for 24 hours, and finally raise the furnace temperature to 1250°C. Then carry out batching in the ratio of 100: 17.6: 3.5: 7.5 by antimony oxychloride slag, soda ash, lime, coke weight ratio, wherein the raw material of batching meets the standard of the present invention, and the moisture mass p...

Embodiment 3

[0031] The composition of antimony oxychloride slag obtained from the treatment of lead anode slime in a factory is as follows: Sb is 69.2%, Pb is 0.8%, Cu is 0.21%, Bi is 0.31%, As is 1.2%, Ag is 500g / T. According to the oven step of the present invention, first use wood as fuel to raise the temperature to 200°C within 48 hours and keep it for 72 hours, then use bituminous coal as fuel to raise the furnace temperature to 350°C within 24 hours and keep it for 36 hours , and then use bituminous coal to raise the furnace temperature to 600°C within 16 hours and keep it for 24 hours, and finally raise the furnace temperature to 1250°C. Then carry out batching according to the ratio of antimony oxychloride slag, soda ash, lime, coke weight ratio being 100: 20.4: 5.0: 8.1, wherein the raw material of batching meets the standard of the present invention, promptly the moisture mass percentage in the antimony oxychloride slag2 CO 3 Mass percentage > 95%, in powder form; CaO mass perc...

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Abstract

The invention relates to a method for recovering antimony from antimonyoxychloride, which comprises the steps of furnace drying, reducing and smelting, coarse antimony refining and casting. The method is characterized in that in the step of reducing and smelting, antimonyoxychloride slag, soda ash, lime and solid carbon are mixed in a certain proportion, the mixture is added into a reverberatory furnace batch by batch, the temperature of the furnace is raised to 1,100 to 1,200 DEG C, the smelting time of each batch is 8 to 12 hours and the pressure in the furnace is kept between 20 and 50Pa. The step of coarse antimony refining comprises adding ammonium dihydrogen phosphate to remove lead, adding sulfur to remove copper and iron and alkaline refining, namely adding ammonium dihydrogen phosphate to remove lead according to a conventional method first, then adding antimony sulfide or sodium sulfide according to copper and iron content to remove the copper and iron, and finally adding soda ash and introducing compressed air to remove arsenic, copper, iron and sulfur and the like. Compared with the prior art, the method has the advantages of short process flow, relatively low cost and over 94 percent of antimony recovery rate.

Description

technical field [0001] The invention relates to a production method of metal antimony, in particular to a production method of recovering antimony from antimony oxychloride slag. Background technique [0002] Antimony is a non-ferrous metal. Generally, it can be obtained as a by-product in the lead-zinc smelting process. The lead anode slime obtained in the lead smelting process contains 30-40% of antimony. The methods of producing metal antimony from lead anode slime can be divided into two categories: fire method and wet method. The production steps of using wet process to recover antimony from lead anode slime are mainly leaching→antimony precipitation→neutralization→washing→drying →The antimony white product, that is, the lead anode slime is leached by wet method, and the leaching solution is subjected to the antimony precipitation step to obtain antimony oxychloride slag containing 60-70% antimony. At present, the main treatment method for antimony oxychloride slag is ...

Claims

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Application Information

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IPC IPC(8): C22B30/02C22B7/04
CPCY02P10/20
Inventor 刘一宁唐爱勇陈雪云林文军
Owner ZHUZHOU SMELTER GRP
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