Low pressure leaching process of coal-bearing kaolin powder for producing industrial aluminum sulfate

An industrial sulfuric acid and coal-based technology, applied in aluminum sulfate, aluminum-sulfur compounds, etc., can solve the problems of poor mixing of coal gangue raw powder and sulfuric acid liquid, failure to take corresponding measures for anti-corrosion technology, and difficulty in ensuring product quality. Curing time, solving anti-corrosion problems, and enhancing bond strength

Inactive Publication Date: 2011-02-16
赵振民 +1
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Problems solved by technology

Such as the Ministry of Chemical Industry HG2225-91 "Industrial Aluminum Sulfate"; such as the technical and economic research on the production of aluminum sulfate from kaolin in the third issue of "Hubei Chemical Industry" in 1995; another example is the published Chinese patents CN1072657A and CN1174172A using coal gangue to produce aluminum sulfate methods, etc.; the deficiencies of the prior art are: the production equipment is obsolete, the anti-corrosion is not easy to solve, and the existing problems are ①, the use of coal gangue raw powder roasting in production makes it difficult to control the temperature; Pollution, and the operation is complicated and labor-intensive. ③The mixture of raw coal gangue powder and sulfuric acid solution is not good.

Method used

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  • Low pressure leaching process of coal-bearing kaolin powder for producing industrial aluminum sulfate
  • Low pressure leaching process of coal-bearing kaolin powder for producing industrial aluminum sulfate

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Embodiment Construction

[0020] The following provides the best embodiment of the present invention

[0021] Raw ore that will meet the quality requirements ( Content ≥34%, Content ≤2.0%) After being crushed by a jaw crusher to a lumpiness ≤2.0cm, it is ground by a Raymond machine (4R3216 grinder) with a fineness of 150-200 mesh. Method of feeding materials into the silo. When preparing the slurry, the mineral material is measured by the electromagnetic hanging bucket, and the water is measured by the level gauge. After the weight ratio of the two is prepared at a concentration of 55-65% in the mixing tank, the air compressor is turned on and pressed into the lead-lined KPI cement lining Inside the reactor of graphite bricks.

[0022] Mix the pulp in the reactor with a certain amount of sulfuric acid, add 610kg of sulfuric acid for every 0.55kg of pulp, (the quality of sulfuric acid should meet the requirements of the first-class international industry), and pass it into steam for preheating for activat...

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Abstract

The technological process of low pressure leaching coal-bearing kaolin powder to produce industrial aluminum sulfate includes the following steps: crushing and grinding coal-bearing kaolin to 150-200 mesh powder, metering and adding water to compound 55-65 wt% concentration slurry and reaction; mixing the ore slurry with sulfuric acid in the ratio of 0.55 kg to 610 kg to react at the temperature of 140+ / -2 deg.c and pressure of 0.33+ / -0.02Mpa for 4-5 hr; relieving pressure and adding water to dilute; depositing separation in a settling tank; neutralizing the solution via adding acid to pH 3-3.5 in a neutralizing tank; evaporating to concentrate and drum crystallizing to obtain product. The process is reasonable, reliable, low in production cost and high in leaching rate, and is used in developing aluminum salt resource.

Description

Technical field: [0001] The invention relates to a multi-purpose inorganic industrial raw material production process, in particular to a process for the production of industrial aluminum sulfate by the low-pressure dissolution method of coal series kaolin raw powder. Background technique: [0002] Aluminum sulfate is a multi-purpose industrial raw material, widely used in more than 20 industries such as papermaking, water purification, textiles, and medicine. The main raw material for the production of industrial aluminum sulfate in my country is bauxite, but bauxite is unevenly distributed and has limited reserves. In recent years, high-quality bauxite resources have become increasingly scarce, which has seriously affected the aluminum salt chemical industry and aluminum smelting industry. development of. However, my country's coal-series kaolin resources are widely distributed, with large reserves, and the accumulated stock is about 3 billion tons. Not only has it piled up lik...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/74
Inventor 赵振民杨报礼
Owner 赵振民
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