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Method for preparing zinc hydroxide and co-producing manganese sulfate and ferrous hydroxide by using waste residue obtained by producing lithopone

A technology of ferrous hydroxide and zinc hydroxide, applied in the directions of zinc oxide/zinc hydroxide, iron oxide/ferric hydroxide, manganese sulfate, etc., can solve the problems of wasting resources, polluting the environment with heavy metals, and having no treatment and utilization methods. , to achieve the effect of low equipment investment cost, few by-products, and suitable for popularization and application

Inactive Publication Date: 2011-02-16
王嘉兴
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  • Summary
  • 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

Method used

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  • Method for preparing zinc hydroxide and co-producing manganese sulfate and ferrous hydroxide by using waste residue obtained by producing lithopone
  • Method for preparing zinc hydroxide and co-producing manganese sulfate and ferrous hydroxide by using waste residue obtained by producing lithopone

Examples

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Effect test

Embodiment 1

[0030] refer to figure 1 , a method for preparing zinc hydroxide to co-produce manganese sulfate and ferrous hydroxide with waste residue obtained from lithopone production, weighing 500 kg of waste residue obtained from lithopone production, 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 , and it is ground into 80-120 mesh coarse powder, and the concentrated hydrochloric acid that is 20-30% with mass concentration 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 sol...

Embodiment 2

[0032] refer to figure 1, a method for preparing zinc hydroxide to co-produce manganese sulfate and ferrous hydroxide with waste residue obtained from lithopone production, weighing 500 kg of waste residue obtained from lithopone production, 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 , and it is ground into 80-120 mesh coarse powder, and the concentrated hydrochloric acid that is 20-30% with mass concentration 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: 2, and a chemical reaction occurs under gentle stirring to obtain a mixed so...

Embodiment 3

[0034] refer to figure 1 , a method for preparing zinc hydroxide to co-produce manganese sulfate and ferrous hydroxide with waste residue obtained from lithopone production, weighing 500 kg of waste residue obtained from lithopone production, 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 , and it is ground into 80-120 mesh coarse powder, and the concentrated hydrochloric acid that is 20-30% with mass concentration 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: 2.5, a chemical reaction occurs under gentle stirring to obtain a mixed sol...

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Abstract

The invention provides a Method for preparing zinc hydroxide and co-producing manganese sulfate and ferrous hydroxide by using waste residue obtained by producing lithopone. The method comprises the following steps of: reacting waste residue obtained by producing the lithopone with hydrochloric acid to obtain chloride; reacting the chloride with sodium hydride to obtain a mixture containing zinc hydroxide, manganic hydroxide and ferrous hydroxide; filtering the obtained mixture to obtain a filter cake containing the zinc hydroxide and ferrous hydroxide and filtrate containing the manganic hydroxide; reacting the obtained filter cake with zinc sulfate to obtain the zinc hydroxide and ferrous sulfate; and further reacting the output ferrous sulfate with the manganic hydroxide to generate ferrous hydroxide and manganese sulfate. According to the method, waste is turned into wealth, the waste residue obtained by producing the lithopone is effectively converted into phosphate with great economic significance, the potential economic value is fully utilized and a new way is provided for comprehensively utilizing and disposing the waste residue obtained by producing the lithopone.

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 zinc hydroxide and co-producing manganese sulfate and ferrous hydroxide with 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 con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/02C01G45/10B09B3/00C01G9/02
CPCY02W30/82
Inventor 王嘉兴
Owner 王嘉兴