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Preparation method of large-particle zinc sulfate

A technology of zinc sulfate and large particles, applied in the direction of zinc sulfate, etc., can solve the problems of fine particles, easy agglomeration, and difficult centrifugal drying, etc., and achieve the effects of improving production efficiency, reducing energy consumption, and shortening crystallization time

Inactive Publication Date: 2019-08-23
湖州惠鹏达节能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the crystallization time in actual production is as long as ten hours. If the crystallization time is not enough, the obtained product particles will be fine. Because of its large specific surface area, it will carry some free water. It is difficult to centrifugally dry in industrial production, resulting in the main grade zinc. The content is not enough and it is easy to agglomerate, so a preparation method of large particle zinc sulfate is proposed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of preparation method of large particle zinc sulfate of the present invention, comprises the following steps:

[0022] S1. the secondary zinc oxide and zinc oxide in the waste slag produced by the preparation of zinc are placed in the raw material pool, and dilute sulfuric acid is injected in the raw material pool to make it react to generate zinc sulfate solution, then the zinc sulfate solution is imported into the reaction tank, and The iron, cobalt and copper impurities in the zinc sulfate liquid are removed in the reaction pool, and the impurities are filtered out through a filter;

[0023] S2. Import the zinc sulfate solution that removes impurities into the storage tank for precipitation treatment, and perform preheating treatment at a temperature of 60-72°C, and send the zinc sulfate solution after the preheating treatment to an evaporator for evaporation to obtain zinc sulfate Concentrate;

[0024] S3. placing the concentrated solution of zinc sulfate wi...

Embodiment 2

[0028] A kind of preparation method of large particle zinc sulfate of the present invention, comprises the following steps:

[0029] S1. the secondary zinc oxide and zinc oxide in the waste slag produced by the preparation of zinc are placed in the raw material pool, and dilute sulfuric acid is injected in the raw material pool to make it react to generate zinc sulfate solution, then the zinc sulfate solution is imported into the reaction tank, and The iron, cobalt and copper impurities in the zinc sulfate liquid are removed in the reaction pool, and the impurities are filtered out through a filter;

[0030] S2. Import the zinc sulfate solution that removes impurities into the storage tank for precipitation treatment, and perform preheating treatment at a temperature of 60-72°C, and send the zinc sulfate solution after the preheating treatment to an evaporator for evaporation to obtain zinc sulfate Concentrate;

[0031] S3. placing the concentrated solution of zinc sulfate wi...

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Abstract

The invention provides a preparation method of large-particle zinc sulfate, which comprises the following steps: putting zinc hypoxide and zinc oxide in the waste residue generated by the preparationof the zinc into a raw material pool filled with dilute sulfuric acid to generate a zinc sulfate solution, and then introducing the zinc sulfate solution into a reaction pool to remove iron, cobalt and copper impurities in the zinc sulfate solution through a filter; introducing the impurity-removed zinc sulfate solution into a storage tank for precipitation treatment, and then obtaining the zinc sulfate concentrate solution through preheating treatment and evaporation concentration; starting to cooling slowly to 32-36 DEG C when the temperature of the solution is 48 DEG C, fine crystals beginning to appear in a crystallizer; then rapidly raising the temperature of the solution to the point where the crystal is completely dissolved; slowly cooling the solution to 36-38 DEG C, adding 9-12g / Lof crystal, rapidly cooling the solution to 25-29 DEG C, and keeping the solution at a constant temperature for 7.5-9hours to obtain large-size zinc sulfate crystals. The method of adding seed crystal can obtain large-size zinc sulfate crystals and can shorten the crystallization time, reduce the energy consumption in the cooling process and improve the production efficiency.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of compound preparation, in particular to a preparation method of large particle zinc sulfate. [0003] 【Background technique】 [0004] Zinc sulfate is the main raw material for making lithopone and zinc salt. It can also be used as a printing and dyeing mordant, a preservative for wood and leather, and an important auxiliary raw material for the production of viscose fiber and vinylon fiber. In addition, it is also used in electroplating and electrolysis industries, and can also be used to make cables. Cooling water is the largest water consumption in industry. The cooling water in the closed circulation cooling system cannot corrode and scale the metal, so it needs to be treated. This process is called water quality stabilization, and zinc sulfate is used as a water quality stabilizer here. However, the crystallization time in actual production is as long as ten hours. If the crystallization time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/06
CPCC01G9/06
Inventor 刘振宇冯金海刘永胡正福孙振玉
Owner 湖州惠鹏达节能环保科技有限公司
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