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High-purity calcium aluminate powder for production of purifying agents

A calcium aluminate powder, high-purity technology, applied in the preparation of calcium aluminate, alkaline earth metal aluminate/aluminum oxide/aluminum hydroxide, etc., can solve the problems of high content and unfavorable human health

Inactive Publication Date: 2015-01-07
贵州遵辉环保科技有限公司
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Problems solved by technology

But the content of heavy metal index tribute, arsenic, cadmium, chromium, lead in existing calcium aluminate powder is higher, is unfavorable for the health of human body

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  • High-purity calcium aluminate powder for production of purifying agents

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Embodiment Construction

[0013] Calcium aluminate powder is an off-white powder. It is mainly used for the production of aluminum salts such as polyaluminum chloride, aluminum sulfate, sodium aluminate, etc. It can also be used for the adjustment of alkalinity degree and for refractory materials. The main ingredient is a mixture of calcium dialuminate (CaO·2A1203) and calcium monoaluminate (CaO·A1203), which is slightly soluble in water, the aqueous solution is alkaline, and the pH value is about 11. Calcium aluminate powder has high reactivity with inorganic strong acid, it can be started at room temperature, and the heat release is large, the temperature rises quickly, the dissolution rate of alumina can reach more than 90%, and it is used as raw material to produce liquid or solid polymerization chlorination. Aluminum can simplify the process, reduce costs and improve product quality, and is currently the raw material used by most polyaluminum chloride manufacturers at home and abroad. In order to ...

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Abstract

The invention relates to a high-purity calcium aluminate powder for the production of purifying agents. The high-purity calcium aluminate powder comprises the following components in percentage by weight: 60-72% of aluminum hydroxide, 25-40% of light calcium carbonate, and the balance of water. The high-purity calcium aluminate powder produced by using the formula above is prepared through the following concrete steps: (1) preparing aluminum hydroxide and light calcium carbonate in corresponding proportion, grinding, uniformly mixing, and putting the obtained mixture into a stirring cylinder; (2) injecting water into the stirring cylinder, and stirring while injecting water until the mixed material is pasty; (3) returning the uniformly mixed pasty material to a rotary kiln, and calcining the pasty material for 30-50 minutes by using natural gas at a calcining temperature of 1200 DEG C, so that massive high-purity calcium aluminate is obtained; (4) grinding the massive high-purity calcium aluminate, and enabling the obtained product to pass through a 120-mesh sieve, so that powdered high-purity calcium aluminate is obtained; and (5) packaging and storing the powdered high-purity calcium aluminate. The heavy metal content of the high-purity calcium aluminate powder disclosed by the invention is far lower than the national standard, therefore, the high-purity calcium aluminate powder is extremely applicable to the treatment of drinking water.

Description

technical field [0001] The invention belongs to the field of chemical industry, and particularly relates to a water purifying agent for producing high-purity calcium aluminate powder. Background technique [0002] Calcium aluminate powder is a kind of raw material of water purifier. The main components are CaO, AL2O3, Fe2O3. , and has the advantages of simple process equipment and easy to master. It is an ideal raw material for the production of basic aluminum chloride and polyaluminum chloride products. However, the existing calcium aluminate powder has relatively high content of heavy metal indexes, arsenic, cadmium, chromium and lead, which is not conducive to the health of the human body. SUMMARY OF THE INVENTION [0003] In order to meet the national standard of polyaluminum chloride and reduce the content of heavy metals, arsenic, cadmium, chromium and lead, the purpose of the present invention is to provide a high-purity calcium aluminate powder for the produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/16
CPCC01F7/164
Inventor 文邦祥
Owner 贵州遵辉环保科技有限公司
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