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A method for separating arsenic and antimony from silver smelting soot
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A soot and flue gas technology, applied in the field of separating arsenic and antimony, can solve the problems of resource waste, difficult waste liquid treatment, complicated process, etc., and achieve the effect of simple ingredients, obvious procedures and degrees, and environmental friendliness
Active Publication Date: 2018-12-07
CHENZHOU CITY JINGUI SILVER IND CO LTD
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The process is complex and the waste liquid treatment is difficult, resulting in waste of resources and serious environmental pollution
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Embodiment 1
[0014] A method for separating arsenic and antimony from silver smelting soot, comprising the following steps:
[0015] (1) Take an appropriate amount of lead anode slime, coke particles, iron filings, soda ash, and fluorite, and mix the ingredients in proportion. The ingredients of the mixture are (in mass percentage): 84% of lead anode slime, 11% of coke particles, and 2% of iron filings %, 3% soda ash, 0.03% fluorite, and then conveyed to the oxygen-enriched bottom blowing furnace for melting by screw;
[0016] (2) Feed oxygen into the oxygen-enriched bottom blowing furnace and melt for 6 hours at a temperature of 1100°C. After the melting is completed, smelting slag, flue gas and precious lead are obtained, and the smelting slag is cooled and sent to the hazardous waste warehouse for storage ; Precious lead is cast into ingots by the disc ingot casting machine, and then sent to the oxidation refining system;
[0017] (3) In step (2), the flue gas produced by the oxygen-en...
Embodiment 2
[0021] A method for separating arsenic and antimony from silver smelting soot, comprising the following steps:
[0022] (1) Take an appropriate amount of lead anode slime, coke particles, iron filings, soda ash, and fluorite, and mix the ingredients in proportion. The ingredients of the mixture are (in mass percentage): 88% of lead anode slime, 8% of coke particles, and 2% of iron filings %, 1.87% soda ash, 0.03% fluorite, and then transported to the oxygen-enriched bottom blowing furnace for melting by screw;
[0023] (2) Feed oxygen into the oxygen-enriched bottom blowing furnace and melt for 6 hours at a temperature of 1000°C. After the melting is completed, smelting slag, flue gas and precious lead are obtained, and the smelting slag is cooled and sent to the hazardous waste warehouse for storage ; Precious lead is cast into ingots by the disc ingot casting machine, and then sent to the oxidation refining system;
[0024] (3) In step (2), the flue gas produced by the oxyg...
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Abstract
The invention relates to a method for separating arsenic and antimony from silver smelting soot. The method comprises the steps that lead anode mud is mixed with coke particles, iron filings, soda ash and fluorite according to the proportion and smelted; the generated flue gas is cooled through a waste heat boiler, and high-sliver soot is recovered and conveyed to a bottom-blowing furnace and is subjected to reduction smelting; then the flue gas is introduced into an electrostatic precipitator and cooled, high-antimony smoke dust in the flue gas is collected, and crude antimony trioxide is formed and conveyed into an antimony refining system; and then flue gas exhausted during electrostatic precipitation is introduced into a quench tower and cooled, smoke dust is collected by a cloth bag, high-arsenic smoke dust in the flue gas is collected, and thus arsenic and antimony separation is achieved. According to the method for separating arsenic and antimony from the silver smelting soot, the recycling technology of gold, silver and valuable metal in the anode mud is improved and perfected, the resource utilization rate and the metal recovery rate are increased, and the environmental pollution is reduced.
Description
technical field [0001] The invention belongs to the field of nonferrous metal metallurgy, and in particular relates to a method for separating arsenic and antimony from silver smelting soot. Background technique [0002] In the process of pyroprocessing lead anode slime, a kind of flue gas containing arsenic and antimony is usually produced. Due to the strong volatility of arsenic and its compounds, the arsenic contained in smelting raw materials is more enriched in various in the smoke. These high-arsenic flue gases also contain a large amount of other valuable metals. Removing arsenic from such flue gases and recovering other valuable metals is an effective way to improve resource utilization. When dealing with flue gas containing arsenic and high antimony, the main direction is concentrated on the recovery of antimony and the treatment of arsenic, and arsenic and antimony are elements of the same main group with similar properties, so the separation of arsenic and antimo...
Claims
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