Method for preparing lead ingots, zinc powder and mixed iron slag from waste residues in lithopone production

A technology of lithopone and mixed iron, which is applied in the field of producing lead ingot, zinc powder and mixed iron slag, which can solve the problems of heavy metal pollution of the environment and waste of resources, and achieve less by-products, low equipment investment costs, and simple operation Effect

Inactive Publication Date: 2011-04-13
王嘉兴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of this waste residue is stacked in the open air or used to fill gaps and pave roads, which not only wastes resources, but also seriously pollutes the environment with heavy metals

Method used

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  • Method for preparing lead ingots, zinc powder and mixed iron slag from waste residues in lithopone production
  • Method for preparing lead ingots, zinc powder and mixed iron slag from waste residues in lithopone production

Examples

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Embodiment 1

[0025] A method for producing lead ingots, zinc powder and mixed iron slag with lithopone gained waste slag, comprising the following specific steps: weighing 600 kg of lithopone gained waste slag, converting the amount of lead sulfate in the lithopone gained waste slag The mass content is 303kg and the mass content of zinc ferrite is 241kg. According to the pure substance mass ratio of lead sulfate, iron and carbon as 1:0.28:0.04, weigh iron scrap and white coal, meanwhile, according to the pure mass ratio of zinc ferrite and sodium carbonate Weigh sodium carbonate at 1:0.59, mix all the substances evenly, send it from the top of the electric arc furnace into a closed air-isolated electric arc furnace, heat it to 1200°C for reaction, separate the lead and zinc oxide in the waste residue, and the lead is in a molten state It flows out from the furnace and is cast into lead ingots as crude products, which are remelted and refined to obtain high-quality metallic lead, in which th...

Embodiment 2

[0027] A method for producing lead ingots, zinc powder and mixed iron slag with lithopone gained waste slag, comprising the following specific steps: weighing 600 kg of lithopone gained waste slag, converting the amount of lead sulfate in the lithopone gained waste slag The mass content is 303kg and the mass content of zinc ferrite is 241kg, and the iron cutting and white coal are weighed according to the pure mass ratio of lead sulfate, iron and carbon as 1:0.38:0.06, and at the same time, according to the pure mass ratio of zinc ferrite and sodium carbonate Weigh the sodium carbonate at a ratio of 1:0.79, mix all the substances evenly, send them from the top of the electric arc furnace into a closed air-isolated electric arc furnace, heat to 1300°C for reaction, separate the lead and zinc oxide in the waste residue, and melt the lead The state flows out from the furnace, casts into lead ingot crude products, and remelts and refines to obtain fine metal lead, of which the pure...

Embodiment 3

[0029] A method for producing lead ingots, zinc powder and mixed iron slag from waste residue obtained from lithopone production, comprising the following specific steps: converting the mass content of lead sulfate and zinc ferrite in the waste residue obtained from lithopone production, and weighing Iron scrap and white coal, and weigh iron scrap and white coal according to the pure mass ratio of lead sulfate, iron and carbon of 1:0.08:0.02, and at the same time, weigh according to the pure mass ratio of zinc ferrite and sodium carbonate of 1:0.39 Sodium carbonate, after mixing all the substances evenly, is sent from the top of the electric arc furnace into a closed air-isolated electric arc furnace, heated to 1250°C for reaction, and the lead and zinc oxide in the waste residue are separated, and the lead flows out of the furnace in a molten state. Casting into lead ingot crude product, after remelting and refining to obtain fine metal lead, wherein the pure substance mass of...

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Abstract

The invention provides a method for preparing lead ingots, zinc powder and mixed iron slag from waste residues in lithopone production. The method comprises the following steps of: uniformly mixing the waste residues and filings in lithopone production, hard coal and sodium carbonate, and delivering to a hermetic air-isolated arc furnace; raising the temperature to between 1,200 and 1,300 DEG C for reaction; casting lead to form a lead ingot crude product after the lead flows out from the furnace in a molten state, and remelting and refining to prepare quality metal lead; adding coke into the arc furnace when the temperature of the arc furnace is reduced to about 100 DEG C, raising the temperature to between 1,300 and 1,400 DEG C, reducing zinc oxide into zinc steam, condensing the zinc steam by using a serially connected condenser, collecting, and screening by using an 80-mesh screen to obtain qualified zinc powder which has no screen tailings; and mixing the rest of furnace slags in the arc furnace, which is a large quantity of iron slags, and a small amount of rare metal salt, further processing through smelting to obtain iron ingots.

Description

technical field [0001] The invention relates to the technical field of comprehensive treatment and utilization of waste slag obtained from producing lithopone, in particular to a method for preparing lead ingots, zinc powder and mixed iron slag by using the waste slag obtained from lithopone production. Background technique [0002] Lithopone, commonly known as lithopone, is a mixture of zinc sulfide and barium sulfate, usually prepared by roasting and leaching. That is to say, the natural barite containing more than 95% of barium sulfate and anthracite are mixed and fed at a ratio of 3:1 (mass), and then crushed to a diameter of about 2 cm or less and enter the reduction furnace. 600°C, the reduction furnace rotates at a speed of 80s per revolution, and the reaction conversion rate is 80% to 90%. The obtained barium sulfide enters the leaching device, and the temperature is controlled above 65°C to obtain a barium sulfide content of 701%, and then enters the clarification ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B13/00C22B19/00
CPCY02P10/20
Inventor 王嘉兴
Owner 王嘉兴
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