Production method of crystal alum

A production method and crystal technology, applied in the field of crystal alum production, can solve problems such as slag not being reused, materials not seen, serious losses, etc., and achieve the effects of being beneficial to environmental protection, reducing pollution, and improving output and quality.

Inactive Publication Date: 2004-07-28
王如声
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two major alum mines in Lujiang, Anhui and Cangnan, Zhejiang are quite representative in China. They have been produced by the traditional old method for many years. The consumption is high, the cost is high, and the loss is serious. The discarded slag has not been reused. The s

Method used

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  • Production method of crystal alum
  • Production method of crystal alum
  • Production method of crystal alum

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1

[0021] Take 15 tons of potassium alunite slag with 10% alumina content and place it in a large acid-resistant container; take another 2 tons of industrial potassium chloride and add 2.5 tons of 95% sulfuric acid to a smaller acid-resistant container to absorb hydrogen chloride. To remove, put the obtained potassium hydrogen sulfate and excess sulfuric acid into a large acid-resistant container, add 2.75 tons of 95% sulfuric acid, after fully reacting to form potassium aluminum sulfate, add appropriate amount of water to weather it at room temperature, steam it, and heat to 95°C Dissolve it, separate the liquid from the solid residue, and remove the solid residue. At this time, the solid residue is mainly silica sand. Recrystallize the obtained liquid and take out the crystalline potassium alum product. The liquid after taking out the crystals can be put into a large acid-resistant container, so that the recovered liquid can be reused in order to increase the out...

Example Embodiment

[0022] Example 2

[0023] Take 15 tons of potassium alunite slag with 10% alumina content and place it in a large acid-resistant container; take 2 tons of industrial potassium chloride and add 2.5 tons of 98% sulfuric acid to a smaller acid-resistant container to absorb and remove the hydrogen chloride. Put the obtained potassium hydrogen sulfate and excess sulfuric acid into a large acid-proof container, and add 2.75 tons of 98% sulfuric acid; after fully reacting to form aluminum potassium sulfate, add appropriate amount of water to weather it at room temperature, steam it, and heat it to 98°C. Dissolve, the following steps are the same as in Example 1, to obtain a crystalline potassium alum product.

Example Embodiment

[0024] Example 3

[0025] Take 15 tons of ammonium alunite slag with 10% alumina content, put it into a large acid-resistant container, add 2.04 tons of 90% sulfuric acid; put the obtained ammonium bisulfate together with excess sulfuric acid into a large acid-resistant container, and add 2.55 tons of 90% sulfuric acid. % Sulfuric acid, after fully reacting to form ammonium aluminum sulfate, add appropriate amount of water to weather it at room temperature, steam it, and heat to 80°C to dissolve it. The following steps are the same as in Example 1 to obtain a crystalline ammonium alum product.

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Abstract

The production method of crystal alum includes the following steps: placing the roasted alumina-contained raw material into a large-type acid-resisting container, adding sulfuric acid and hydrogen sulfate (when it is used for producing potassium alum, adding potassium hydrogen sulfate and when it is used for producing ammonium alum, adding ammonium hydrogen sulfate), fully reacting to obtain anhydrous potassium aluminium sulfate or anhydrous ammonium aluminium sulfate, adding proper quantity of water to make it be crystallized, introducing steam to heat and dissolve, separating liquid and solid, removing solid residue, recrystallizing, taking crystal potassium alum or ammonium alum, the placing the residual solution into the large-type acid-resistant container for recovery and utilization.

Description

Technical field: [0001] The invention relates to a production method of crystal alum, belonging to the field of comprehensive utilization of non-metallic ore and slag. Background technique: [0002] The working people in our country have long known the technology of using alum. Alumstone (Alumstone) in nature can be divided into potassium alumite (Kalialunite) according to its chemical composition. raw material. The two major alum mines in Lujiang, Anhui and Cangnan, Zhejiang are quite representative in China. They have been produced by the traditional old method for many years. The consumption is high, the cost is high, and the loss is serious. The discarded slag has not been reused. The slag discarded in Lujiang, Anhui alone can reach More than 3 million tons, piled up like a mountain, has become a major problem in the treatment and comprehensive utilization of the three wastes. Although we have explored in many ways, we have not found any data to solve this problem. I...

Claims

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Application Information

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IPC IPC(8): C01F7/76C30B29/22
Inventor 王如声
Owner 王如声
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