Nano level light calcium carbonate producing process and apparatus

A light calcium carbonate, production equipment technology, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of unstable product batch quality, excessive particle diameter, uneven particle size, etc., achieve small footprint and improve absorption Rate and utilization, effect of small particle size

Inactive Publication Date: 2004-11-24
上海威宇机电有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a production method and equipment for nano-scale light calcium carbonate with a new carbonization process, to solve the technical problems of excessive product particle diameter, uneven particle size, unstable product batch quality and reaction heat

Method used

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  • Nano level light calcium carbonate producing process and apparatus
  • Nano level light calcium carbonate producing process and apparatus
  • Nano level light calcium carbonate producing process and apparatus

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Embodiment Construction

[0018] see figure 1 As shown, the present invention first utilizes a static mixer with good heat transfer effect to cool the calcium hydroxide suspension from the digestion process, and lower its temperature from 50 to 80°C to about 30°C. When the cooled calcium hydroxide suspension flows into the next static mixer, an appropriate amount of crystal form control agent and reaction inhibitor are added, and uniformly mixed in the static mixer. Import carbon dioxide gas after the above-mentioned mixed calcium hydroxide suspension flows out of the static mixer; in order to make carbon dioxide gas can be dispersed in the calcium hydroxide suspension mixed with crystal form control agent and reaction inhibition, can be provided with Air pipe 21 and spraying device 2 of spray head 22 groups (referring to image 3 ) for initial dispersion. The air delivery pipe 21 of this injection device 2 is inserted into the infusion pipeline and bent forward 90°, so that the injection head 22 wit...

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Abstract

The present invention features that calcium hydroxide suspension from the slaking step is first cooled in a static mixer to about 30 deg.c, and then mixed with crystal form controlling agent and reaction inhibitor in the static mixer; the mixed calcium hydroxide suspension and CO2 gas are high speed sheared and reacted in a pipeline high-shearing emulsifying machine with casing, stator-rotor combination and cooling water channel; and after dispersant is mixed to the reacted calcium carbonate suspension in a static mixer, the mixture is finally dewatered, dried and surface treated. The present invention solves the technological problems of large and uneven product granularity, instable product quality, etc.

Description

Technical field: [0001] The present invention relates to calcium compounds, in particular to a production method of nano-scale light calcium carbonate. Background technique: [0002] Carbonization is the main way to produce nano-light calcium carbonate. A certain concentration of refined calcium hydroxide suspension is passed into carbon dioxide gas, and an appropriate crystal form control agent and reaction inhibitor are added to carbonize it to the end to obtain the desired crystal form. Calcium carbonate slurry is dehydrated, dried and surface treated to produce nano-scale light calcium carbonate. However, to turn this concept into industrialization has a great relationship with the production process and equipment of the carbonization reaction process. The existing carbonization reaction process is divided into five types according to different production processes and equipment: intermittent bubbling carbonization method, spray carbonization method, jet absorption carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
Inventor 陆忠义叶楚宝
Owner 上海威宇机电有限公司
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