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A kind of reduction smelting slag and its application in reduction smelting of crude antimony oxide

A technology for smelting slag and antimony oxide, which is applied in the reduction smelting slag and its application in the reduction smelting of crude antimony oxide, can solve the problems of low antimony direct recovery rate, high antimony content in slag, and more volatilized and returned powder, and achieve flow Good performance, rapid slag formation, and the effect of reducing volatilization loss

Inactive Publication Date: 2020-12-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a reduction smelting slag and its application in the reduction smelting of crude antimony oxide, so as to solve the problem of high antimony content in the slag and the direct antimony yield in the current reverberatory furnace reduction smelting crude antimony oxide process. Low, volatile powder return and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In this embodiment, 100g of crude antimony oxide is used as raw material, and its chemical composition is Sb 78.5%, SiO 2 1.41%, Fe 0.36%, CaO 0.09%, Na 0.05%, S 1.39%. Combine the crude antimony oxide with 10g coke powder (84.44% carbon content) and an appropriate amount of SiO 2 , FeC 2 o 4 2H 2 O, CaO, Na 2 CO 3 Mixing chemically pure reagents, designing SiO slag 2 , FeO, CaO, Na 2 The mass percentage between O and O is 34:38:12:16, and the amount of slag is 25g. The material is put into a corundum crucible and placed in a resistance furnace at room temperature, and the temperature is raised to 1000°C at a rate of 10°C / min. Place it for 50 minutes, and produce crude antimony and slag after the heat preservation is over, the direct recovery rate of antimony metal is 90.35%, and the slag contains 0.74% antimony. The grade of the obtained crude antimony is 96.61%.

Embodiment 2

[0045] In this embodiment, 100g of crude antimony oxide is used as raw material, and its chemical composition is Sb 78.5%, SiO 2 1.41%, Fe 0.36%, CaO 0.09%, Na 0.05%, S 1.39%. Combine the crude antimony oxide with 11g coke powder (88.44% carbon content) and an appropriate amount of SiO 2 , FeC 2 o 4 2H 2 O, CaO, Na 2 CO 3 Mixing chemically pure reagents, designing SiO in slag 2 , FeO, CaO, Na 2 The mass percentage between O is 30:34:12:24, and the amount of slag is 28g. Put the material into a corundum crucible and put it into a resistance furnace at room temperature, raise the temperature to 1000°C at a rate of 10°C / min, keep it warm, and let it stand for 50 minutes. %, the slag contains 0.97% antimony. The grade of the obtained crude antimony is 98.49%.

Embodiment 3

[0047] In this embodiment, 100g of crude antimony oxide is used as raw material, and its chemical composition is Sb 78.5%, SiO 2 1.41%, Fe 0.36%, CaO 0.09%, Na 0.05%, S 1.39%. Combine the crude antimony oxide with 12g coke powder (88.44% carbon content) and an appropriate amount of SiO 2 , FeC 2 o 4 2H 2 O, CaO, Na 2 CO 3 Mixing chemically pure reagents, designing SiO slag 2 , FeO, CaO, Na 2 The mass percentage between O is 30:30:12:28, and the amount of slag is 30g. Put the material into a corundum crucible and put it into a resistance furnace at room temperature, raise the temperature to 1000°C at a rate of 10°C / min, keep it warm, and let it stand for 50 minutes. %, the slag contains 0.93% antimony. The grade of the obtained crude antimony is 97.05%.

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Abstract

The invention relates to reduction smelting slag and application of the reduction smelting slag to reduction smelting of coarse antimony oxide, and belongs to the field of nonferrous metallurgy. The designed reduction smelting slag comprises, by mass, 20-40 parts of SiO2, 20-40 parts of FeO, 5-20 parts of CaO and 5-25 parts of Na2O. During reduction smelting of the coarse antimony oxide, the set reduction smelting slag is supplemented, the temperature ranging from 900 DEG C to 1,200 DEG C is kept for 30-120 min, coarse antimony, glass slag, smoke and flue gas can be generated, the coarse antimony and the slag are independently discharged after settling separation, the smoke is subjected to powder returning treatment, and the flue gas is exhausted after being purified. The design technology has the beneficial effects that the smelting temperature is low, the antimony content of the slag is small, the antimony direct recovery rate is high, and the powder returning amount is small; and large-scale industrial application is facilitated.

Description

technical field [0001] The invention relates to a reduction smelting slag and its application in reduction smelting of crude antimony oxide, which belongs to the field of nonferrous metal metallurgy. Background technique [0002] The reverberatory furnace plus alkali reduction smelting method of crude antimony oxide is currently the main crude antimony oxide reduction smelting process. The basic process of this process is to put crude antimony oxide, carbonaceous reducing agent and Na into the reverberatory furnace. 2 CO 3 Flux, rough Sb at a temperature of 1000-1200°C 2 o 3 Reduction smelting produces crude antimony, foam slag and flue gas. This method does not take into account the type of reducing slag, and the produced foam slag has poor properties, high antimony content, and a large amount of powder returned, resulting in low production efficiency, so a new process is urgently needed to replace it. [0003] The Chinese patent application with the application number...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B30/02C22B5/10
CPCC22B5/10C22B30/02
Inventor 唐朝波陈永明刘恒唐雷曾萍叶龙刚李云刘永郭路路
Owner CENT SOUTH UNIV
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