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Method for preparing carbonate from waste slag obtained by producing lithopone

A carbonate and lithopone technology, which is applied in the preparation of carbonate/acid carbonate, chemical instruments and methods, zinc compounds, etc., can solve the problem of no treatment and utilization methods, heavy metal pollution, and waste of resources. and other problems, to achieve the effect of being suitable for popularization and application, less by-products, and low equipment investment costs

Inactive Publication Date: 2011-04-13
汪晋强
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, this kind of waste residue is mostly piled up 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.
For this reason people have carried out a large amount of researches, in the 1973 issue of "Fine Chemical Intermediates", the production of various products with lithopone waste residues has been studied, and "Hunan Chemical Industry" also reported in the 1992 volume 22, phase 1 "Research on the Preparation of Lead Sulfate from Lithopone Acid Leaching Waste Residue", but the article is only in theoretical research, and there is no practical treatment and utilization method

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  • Method for preparing carbonate from waste slag obtained by producing lithopone
  • Method for preparing carbonate from waste slag obtained by producing lithopone

Examples

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Effect test

Embodiment 1

[0022] refer to figure 1 , a method for preparing carbonate by producing lithopone obtained waste residue, weighing 500 kg of lithopone obtained waste residue, weighing 500 kg of lithopone obtained waste residue, wherein the zinc content is 10.50%, and the manganese content is 2.32 %, the iron content is 3.15%, and the molar content of zinc oxide in it is 810 moles, the molar content of manganese oxide is 20 moles and the molar content of ferrous oxide is 28 moles, then the sum of the molar contents of zinc, manganese and iron is 858 Mole, it is ground into 80-120 purpose coarse powder, and mass concentration is the concentrated hydrochloric acid of 20-30% and drops into corrosion-resistant reactor one (1) li, makes zinc oxide, manganese oxide and sub-oxide in the corrosion-resistant reactor The ratio of the molar content of iron to the molar content of hydrogen chloride is 1: 1.5, a chemical reaction occurs under gentle stirring to obtain a mixed solution containing zinc chlo...

Embodiment 2

[0024] refer to figure 1 , a method for preparing carbonate by producing lithopone gained waste residue, weighing the produced lithopone gained waste residue, weighing 500kg producing lithopone gained waste residue, wherein the zinc content is 10.50%, and the manganese content is 2.32% , the iron content is 3.15%, the molar content of zinc oxide is 810 moles, the molar content of manganese oxide is 20 moles and the molar content of ferrous oxide is 28 moles, then the sum of the molar contents of zinc, manganese and iron is 858 moles , be ground into 80-120 mesh coarse powder, put into the anti-corrosion reactor one (1) together with the concentrated hydrochloric acid of 20-30% mass concentration, make zinc oxide, manganese oxide and ferrous oxide in the anti-corrosion reactor The ratio of the molar content sum of the hydrogen chloride to the molar content of hydrogen chloride is 1: 2, chemical reaction takes place under gentle stirring, obtains the mixed solution containing zi...

Embodiment 3

[0026] refer to figure 1 , a method for preparing carbonate by producing lithopone gained waste residue, weighing the produced lithopone gained waste residue, weighing 500kg producing lithopone gained waste residue, wherein the zinc content is 10.50%, and the manganese content is 2.32% , the iron content is 3.15%, the molar content of zinc oxide is 810 moles, the molar content of manganese oxide is 20 moles and the molar content of ferrous oxide is 28 moles, then the sum of the molar contents of zinc, manganese and iron is 858 moles , be ground into 80-120 mesh coarse powder, put into the anti-corrosion reactor one (1) together with the concentrated hydrochloric acid of 20-30% mass concentration, make zinc oxide, manganese oxide and ferrous oxide in the anti-corrosion reactor The ratio of the sum of the molar contents of the hydrogen chloride to the molar contents of hydrogen chloride is 1: 2.5, and a chemical reaction occurs under gentle stirring to obtain a mixed solution co...

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Abstract

The invention provides a method for preparing carbonate from waste slag obtained by producing lithopone, comprising the following steps of: reacting the waste slag obtained by producing the lithopone with concentrated hydrochloric acid, wherein metallic oxide is converted into metal chloride; reacting the metal chloride with sodium carbonate to obtain various carbonates; and carrying out distillation at reduced pressure; and sequentially separating out a zinc carbonate crystal, manganous carbonate and ferrous carbonate products according to the difference of solubility of the carbonate. By using the method, waste can be changed into valuables, the waste slag obtained by producing the lithopone can be changed into the carbonate with more important economic significance, the potential economic value can be fully developed and utilized and novel path for comprehensively utilizing and governing the waste slag obtained by producing the lithopone can be provided.

Description

technical field [0001] The invention relates to the technical field of comprehensive treatment and utilization of waste residue obtained from lithopone production, in particular to a method for preparing carbonate from waste residue obtained from lithopone. Background technique [0002] Lithopone, commonly known as lithopone, is a mixture of zinc sulfide and barium sulfate. Its main raw material is zinc oxide, which is smelted from lead-zinc ore. This zinc oxide contains a large amount of lead oxide impurities, and the lead oxide content is generally 60-80%. Every ton of lithopone produces 0.165 tons of waste lead slag, and with an annual output of 15,000 tons of lithopone, 2480 tons of lead waste slag with a lead content of 30-40% will be discharged. The main chemical components of its waste lead slag are: lead content is 34.63%, zinc content is 10.50%, copper content is 0.23%, cadmium content is 0.31%, iron content is 3.15%, sulfur content is 5.01%, magnesium content is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/00C01G45/00C01G49/00C01B31/24C01B32/60
Inventor 王嘉兴
Owner 汪晋强