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Method for preparing aluminum sulfate solid by using byproduct aluminum mud

A technology of solid sulfuric acid and aluminum mud, applied in aluminum sulfate, aluminum sulfur compounds, etc., can solve problems such as environmental pollution, and achieve the effects of reducing waste pollution, stable product quality, and low cost of raw materials

Inactive Publication Date: 2017-05-31
CITIC JINZHOU METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a method for preparing solid aluminum sulfate with by-product aluminum sludge. Environmental Pollution Problems Caused by Pile of Aluminum Slime

Method used

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  • Method for preparing aluminum sulfate solid by using byproduct aluminum mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) dry milling

[0025] Take 1 ton of dried aluminum slime, whose Al2O3 content is 60%, add 2.37 tons of ammonium sulfate, put it into a ball mill tank and fully mix and grind for 1 hour to obtain a mixed powder of 40-60 mesh aluminum slime and ammonium sulfate;

[0026] 2) High temperature pyrolysis

[0027] Pyrolyze the mixed powder of aluminum slime and ammonium sulfate obtained in step 1) at 300°C for 1 hour. During the pyrolysis process, mix the aluminum slime and ammonium sulfate to make it fully pyrolyzed, and mix the pyrolyzed The powder is added into the water according to the mass ratio of the mixed powder and water as 1:8, fully dissolved at 70°C for 1 hour with heat preservation and stirring, filtered, and the filtrate is evaporated and crystallized to obtain aluminum ammonium sulfate crystals;

[0028] 3) High temperature ammonia solution

[0029] Ammonium aluminum sulfate crystals were subjected to high-temperature ammonium hydrolysis at 400°C for 2 hour...

Embodiment 2

[0032] 1) dry milling

[0033] Take 1 ton of dried aluminum slime, whose Al2O3 content is 80%, add 5.17 tons of ammonium sulfate, and put it into a ball mill tank to fully mix and grind for 3 hours to obtain a mixed powder of 40-60 mesh aluminum slime and ammonium sulfate;

[0034] 2) High temperature pyrolysis

[0035] Pyrolyze the aluminum slime and ammonium sulfate mixed powder obtained in step 1) at 500°C for 3 hours. During the pyrolysis process, mix the aluminum slime and ammonium sulfate to make it fully pyrolyzed, and mix the pyrolyzed The powder is added into water according to the mass ratio of mixed powder and water as 1:10, fully dissolved at 100°C for 3 hours with heat preservation and stirring, filtered, and the filtrate is evaporated and crystallized to obtain aluminum ammonium sulfate crystals;

[0036] 3) High temperature ammonia solution

[0037] Ammonium aluminum sulfate crystals were subjected to high-temperature ammonium hydrolysis at 600°C for 4 hours t...

Embodiment 3

[0040] 1) dry milling

[0041] Take 1 ton of dried aluminum slime, whose Al2O3 content is 70%, add 3.68 tons of ammonium sulfate, put it in a ball mill tank and fully mix and grind for 2 hours to obtain -60 mesh aluminum slime and ammonium sulfate mixed powder;

[0042] 2) High temperature pyrolysis

[0043] Pyrolyze the aluminum slime and ammonium sulfate mixed powder obtained in step 1) at 400°C for 2 hours. During the pyrolysis process, mix the aluminum slime and ammonium sulfate to make it fully pyrolyzed, and mix the pyrolyzed The powder is added into water according to the mass ratio of mixed powder and water as 1:9, fully dissolved at 80°C for 2 hours with heat preservation and stirring, filtered, and the filtrate is evaporated and crystallized to obtain aluminum ammonium sulfate crystals;

[0044] 3) High temperature ammonia solution

[0045] Ammonium aluminum sulfate crystals were subjected to high-temperature ammonium hydrolysis at 500°C for 3 hours to obtain 2.24 ...

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Abstract

The invention relates to a method for preparing aluminum sulfate solid by using byproduct aluminum mud. The method comprises the steps of evenly mixing the dried aluminum mud with ammonium sulfate, and then putting the mixture into a ball mill tank for ball-milling so as to obtain mixed powder of the aluminum mud and the ammonium sulfate, wherein the particle size of the mixed powder is 40-60 meshes; carrying out high-temperature pyrolysis on the mixed powder of the aluminum mud and the ammonium sulfate at the temperature of 300-500 DEG C, adding the mixed powder subjected to pyrolysis into water, carrying out heat preservation at the temperature of 70-100 DEG C, and fully stirring for dissolving; filtering, and carrying out evaporative crystallization on filtrate to obtain aluminum ammonium sulfate crystals; carrying out high-temperature ammonolysis on the aluminum ammonium sulfate crystals at the temperature of 400-600 DEG C to obtain aluminum sulfate crystals. The method has the advantages that the technology is simple; the aluminum mud is taken as the raw material, so that the raw material cost is low; the byproduct aluminum mud is effectively treated, so that the aluminum mud is fully utilized, and the waste pollution is reduced while the byproduct aluminum mud is treated.

Description

technical field [0001] The invention belongs to the field of waste slag aluminum slime treatment, in particular to a method for preparing solid aluminum sulfate with by-product aluminum slime. Background technique [0002] Aluminum sulfate is an important industrial raw material, it can be used to produce artificial gemstones and produce a variety of aluminum salt series products, such as ammonia alum, potassium alum, refined aluminum sulfate, and can be used as paper sizing agent and drinking water, Flocculants for industrial water and wastewater treatment. In addition, aluminum sulfate is also widely used in the production of high-quality clarifying agent, petroleum deodorizing and decolorizing agent, concrete waterproofing agent, high-grade paper wrought white, titanium dioxide coated film treatment and catalyst carrier. [0003] Aluminum slime is the waste residue produced during the calcium-free roasting production process. The main components of aluminum slime are sod...

Claims

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Application Information

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IPC IPC(8): C01F7/74
CPCC01F7/74C01P2006/80
Inventor 刘海田崔传海郭树志李广明任彤滕晓慧李杰李俊强陈涛曹兴任芝灏
Owner CITIC JINZHOU METAL
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