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

An industrial sulfuric acid and coal-based technology, applied in the direction of aluminum sulfate, aluminum sulfur compounds, etc., can solve problems such as poor mixing of coal gangue raw powder and sulfuric acid solution, lack of corresponding measures for anti-corrosion technology, and difficulty in ensuring product quality. Advanced type selection and anti-corrosion technology, stable and reliable product quality, and large production capacity

Inactive Publication Date: 2007-06-27
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coal gangue to produce aluminum sulfate methods, etc.; the deficiencies of the prior art are: the production equipment is obsolete, the anti-corrosion is not easy to solve, and the existing problems are ①, the use of coal gangue raw powder roasting in production makes it difficult to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 alumination sulfate

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Embodiment Construction

[0020] The best embodiment of the present invention is provided below

[0021] Raw ore that will meet the quality requirements (AI 2 o 3 Content ≥ 34%, Fe 2 o 3 content ≤ 2.0%) sent to the jaw crusher for crushing to a lump size ≤ 2.0cm, then milled by a Raymond machine (4R3216 mill) with a fineness of 150-200 mesh. Method feeding into the silo. When mixing slurry, the mineral material is measured by the electromagnetic hanging bucket, and the water is measured by the liquid level gauge. After the weight ratio of the two is prepared in the mixing tank to a concentration of 55-65%, the air compressor is turned on and sent to the KPI cement lining for lead lining. Inside the reactor of graphite bricks.

[0022] Mix the ore pulp in the reaction kettle with a certain amount of sulfuric acid, add 610kg of sulfuric acid for every 0.55kg of ore pulp (the quality of sulfuric acid should meet the requirements of international industrial first-class products), and preheat it with s...

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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 producing industrial aluminum sulfate with a low-pressure dissolution method of raw coal-based kaolin powder. Background technique: [0002] Aluminum sulfate is a multi-purpose industrial raw material, which is widely used in more than 20 industries such as papermaking, water purification, textile, and medicine. The main raw material for the production of industrial aluminum sulfate in my country is bauxite. However, the distribution of bauxite is uneven and the reserves are limited. develop. However, my country's coal-measure kaolin resources are widely distributed and have large reserves, with a cumulative stockpile of about 3 billion tons. Not only are they piled up like mountains, they occupy land, pollute the environment, and have formed public hazards. The comprehensive development and utilization of coal-measure kaolin i...

Claims

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Application Information

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