Method for enriching arsenic on high-arsenic crude lead refining slag

A crude lead refining and slagging technology, applied in the field of metallurgy, can solve the problems of large amount of slag, high lead content in scum, low arsenic enrichment rate, etc., and achieve the effect of simple process, low cost and convenient operation

Inactive Publication Date: 2019-08-30
YUNNAN CHIHONG RESOURCE COMPREHENSIVE UTILIZATION CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not have a high enrichment rate of arsenic in the slag (less than 20%), and at the same time removes a large amount of antimony (antimony enters the slag), which is not conducive to the control of the antimony content in the anode; in addition, the amount of slag produced by this method is relatively large, high lead content in scum, which is not conducive to the direct recovery rate of lead refining, therefore, this conventional method is difficult to meet the needs of existing production

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  • Method for enriching arsenic on high-arsenic crude lead refining slag

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Experimental program
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Effect test

Embodiment 1

[0017] According to the weight ratio, 18.42% Isa furnace crude lead, 78.2% reduction furnace crude lead, and 3.7% converter crude lead are used in the pot, and the environmental dust collection cover is covered after filling once. The average composition of the material in the pot is: Pb : 97.20%, Ag: 887g / t, Cu: 0.21%, Sb: 0.69%, As: 1.15%; heat up and melt, when the temperature of the lead liquid reaches 330°C, start slag pressing, and stir when the temperature reaches about 340°C; stir for 8 minutes Finally, add a certain amount of slagging agent (raw coal) into the pot manually to stir and make slagging; after stirring for 70 minutes, observe that the scum changes loosely, does not agglomerate, and is fine-grained when it is gray-black, indicating that the reaction is sufficient, stop Stirring, the final temperature of slagging is 375°C; the scum is removed, and the scum is processed in the converter after sampling and analysis; the lead liquid after slagging is pumped into...

Embodiment 2

[0021] According to the weight ratio, 18.38% Isa furnace crude lead, 78.22% reduction furnace crude lead, and 3.40% converter crude lead are used in the pot, and the environmental dust collection cover is covered after filling once. The average composition of the material in the pot is: Pb : 96.73%, Ag: 910g / t, Cu: 0.19%, Sb: 0.61%, As: 1.07%; heat up and melt, when the temperature of the lead liquid reaches 332°C, start slag pressing, and stir when the temperature reaches about 341°C; stir for 10 minutes Finally, add a certain amount of slagging agent (raw coal) into the pot manually to stir and make slagging; after stirring for 75 minutes, observe that the scum changes loosely, does not agglomerate, and is fine-grained when it is gray-black, indicating that the reaction is sufficient, stop Stirring, the temperature at the end point of slagging is 378°C; the scum is removed, and the scum is processed in the converter after sampling and analysis; the lead liquid after slagging ...

Embodiment 3

[0025] According to the weight ratio, 18.32% Isa furnace crude lead, 78.16% reduction furnace crude lead, and 3.52% converter crude lead are used in the pot, and the environmental dust collection cover is covered after filling once. The average composition of the material in the pot is: Pb : 97.33%, Ag: 1204g / t, Cu: 0.22%, Sb: 0.64%, As: 0.94%; heat up and melt, when the temperature of the lead liquid reaches 333°C, start slag pressing, and stir when the temperature reaches about 342°C; stir for 10 minutes Finally, a certain amount of slagging agent (raw coal) is manually added into the pot for stirring and slagging; after stirring for 78 minutes, observe that the scum changes loosely, does not agglomerate, and is fine-grained when it is gray-black, indicating that the reaction is sufficient, stop Stirring, the final temperature of slagging is 380°C; the scum is removed, and the scum is processed in the converter after sampling and analysis; the lead liquid after slagging is pu...

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Abstract

The invention relates to a method for enriching arsenic on high-arsenic crude lead refining slag, and belongs to the field of metallurgy. The method specifically comprises the following steps that crude lead raw materials are mixed according to a certain ratio and then are loaded into a lead smelting pot, and an environment-friendly dust collecting cover covers the lead smelting pot; heating and melting are carried out, slag pressing is carried out at the temperature of 330-340 DEG C, and stirring is carried out after the temperature reaches 340 DEG C; after stirring is carried out for 5-10 minutes, a slagging agent is added for stirring and slagging; stirring and slagging are carried out for 60-80 minutes, wherein the temperature is not more than 380 DEG C, and when the dross becomes loose and is not caked and is in an ash-black granular state, stirring is stopped; and converter treatment is carried out after dross dragging is carried out, and a lead liquid is pumped into an anode casting pot to be treated. According to the method, the different crude lead and lead-containing materials are subjected to the operation of proportioning, feeding into the pot, material smelting, slagging and slag dragging so that arsenic in the materials can be more enriched in the dross, meanwhile, the main grade of a lead anode plate is controlled to be controlled to be not lower than 98.5%, andthe arsenic content of the lead anode plate is not higher than 0.8%, so that the arsenic content in anode slime after electrolysis can be further reduced, and the direct yield of pyrogenic refining inthe lead anode slime can be improved.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a method for refining slagging of high-arsenic crude lead and enriching arsenic. Background technique [0002] The arsenic content of some crude lead is relatively high. The arsenic content of the lead liquid after the general fire method preliminary refining is relatively high. The arsenic content of the anode plate after casting exceeds 1%, and the main grade of the anode is reduced, especially the main grade of the anode is lower than 98.5. %, the concentration of lead ions in the lead electrolyte will continue to decrease, resulting in the deterioration of the crystallization of lead flakes and the decline in the output of lead flakes, thus affecting the normal production of lead electrolysis. When the arsenic content in the lead anode exceeds 1%, it will cause the arsenic content of the lead anode slime to exceed 40%. During the anode slime blowing process, due to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/06C22B9/10
CPCC22B9/10C22B13/06
Inventor 刘克洋张梅李建伟薛灿董铁广黎学坤杨新昌罗恒郝二丽董台烽杨从刚徐建源罗富兴翟琳娜
Owner YUNNAN CHIHONG RESOURCE COMPREHENSIVE UTILIZATION CO LTD
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