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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 slag discarded in Lujiang, Anhui alone can reach More than three million tons, piled up like a mountain, has become a major problem in the treatment and comprehensive utilization of three wastes
Although we have explored in many ways, the data to solve this problem has not been found

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Get 15 tons of potassium alunite slag with an alumina content of 10%, and put it in a large acid-resistant container; take another 2 tons of potassium chloride for industrial use and add 2.5 tons of 95% sulfuric acid in a smaller acid-resistant container, and the hydrogen chloride gas produced will absorb and transfer Go, put the obtained potassium bisulfate together with excess sulfuric acid into a large acid-resistant container, add 2.75 tons of 95% sulfuric acid, after fully reacting to form aluminum potassium sulfate, add an appropriate amount of water to weather at room temperature, pass in steam, and heat to 95°C Make it dissolve, separate the liquid from the solid residue, and remove the solid residue. At this time, the solid residue is mainly silica sand. The obtained liquid is recrystallized, and the crystal potassium alum product is taken out. The liquid after taking out the crystals can be placed in a large acid-resistant container, so that the recovered liqui...

Embodiment 2

[0023] Get 15 tons of potassium alunite slag with an alumina content of 10%, put it in a large acid-resistant container; get another 2 tons of potassium chloride for industrial use, add 2.5 tons of 98% sulfuric acid in a smaller acid-resistant container to absorb and remove it, Put the obtained potassium bisulfate together with excess sulfuric acid into a large acid-resistant container, add 2.75 tons of 98% sulfuric acid; after fully reacting to form aluminum potassium sulfate, add appropriate amount of water to weather at room temperature, pass in steam, and heat to 98°C to make it Dissolving, following steps are identical with embodiment 1, obtain crystal potassium alum product.

Embodiment 3

[0025] Take 15 tons of ammonium alunite slag with an alumina content of 10%, 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, add 2.55 tons of 90% sulfuric acid % sulfuric acid, after fully reacting to form ammonium aluminum sulfate, add appropriate amount of water to weathering at normal temperature, feed steam, be heated to 80 ℃ and make it dissolve, following steps are identical with embodiment 1, obtain 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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