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A method for preparing nano calcium carbonate

A technology of nano-calcium carbonate and carbonization method, applied in the direction of calcium carbonate/strontium/barium, nanotechnology, nanotechnology, etc., can solve the problems of insufficient product particle size, poor product quality repeatability, wide particle size distribution, etc., to achieve product The effect of stable quality, shortened carbonization time, and small particle size distribution

Active Publication Date: 2009-09-30
GUANGXI HUANA NEW MATERIALS TECH CO LTD
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Problems solved by technology

Through the practice in the process of industrialization, this method has made a significant improvement to the carbonization reaction process, mainly solving the problems of insufficient ultra-fine particle size, wide particle size distribution and difficult control, poor repeatability of different batches of product quality, etc., making the product quality With further improvement, Tongjin has further optimized the production process of nano-calcium carbonate

Method used

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  • A method for preparing nano calcium carbonate

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Embodiment Construction

[0042] The method for preparing nano-calcium carbonate of the present invention is illustrated below in conjunction with specific examples: (note: used carbonization reactor is tower type carbonization reactor in this example, and diameter is Φ 1600mm, tower height 11m.)

[0043] First, the quicklime is broken into small pieces of about 1-4cm, and 750kg of quicklime and 6750kg of clean water are mixed and digested in the form of continuous feeding. Then filter the slag through the 80-120 mesh resonance sieve, and then pass through the suspension separator to further remove the slag to obtain Ca(OH) 2 10% Calcium Hydroxide Essence Milk. The finished milk is placed in the slurry storage tank, and after being stirred and mixed evenly, the temperature of the finished milk is 70°C. Pump the fine milk into the cooling tank for one-time freezing and cooling. When the temperature drops to 25°C, use the pump to pump it into the tower carbonization reactor from the top of the tower.

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Abstract

The invention relates to a method for preparing nano calcium carbonate, belonging to freezing carbonizing, which indicates the processing of digestion, carbonizing, moisture abstraction and drying of the quicklime. The carbonizing procedure includes first carbonizing, the maturing of reaction commingle glue and second carbonizing, and during the optimized preparing procedure, the processing of activating, detracting and surface cladding activating also can be added. As the invention employs two stage carbonizing process, the lime cream can get thoroughly reaction in the carbonizing column, the gas and liquor can contact well, good number of crystal nucleon can be generated well, the particle diameter of the nano calcium carbonate particle is controllable at the range of 20-80nm, and the product quality is stabilizing. The carbonizing time is considerably curtailed, the productivity effect is improved, and this present method needs low productive investment as third of other methods and 80% cost of other methods.

Description

technical field [0001] The invention relates to a method for preparing nanometer calcium carbonate, more specifically relates to a method for preparing active nanometer calcium carbonate by freezing method. Background technique [0002] Nano-calcium carbonate refers to the product of chemically synthesized calcium carbonate with a particle size in the range of 0-100nm. It is used in the plastics industry and rubber industry as a filler and reinforcement to reduce the cost of the product and enhance the quality of the product. Efficacy: Applied in the ink industry, paper industry, coating industry, used as a filler, can play multiple functions such as thickening and anti-settling, improving product performance and reducing product production costs; in the feed industry, it can be used as a calcium supplement, To increase the calcium content of the feed; used in cosmetics, because of its high purity, good whiteness, and fine particle size, it can replace titanium dioxide. [...

Claims

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Application Information

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IPC IPC(8): C01F11/18B82B3/00
Inventor 黄安定刘振昭黄炜民刘承龙黎飞刘繁球陈树勋罗海波农尚斌庞健威
Owner GUANGXI HUANA NEW MATERIALS TECH CO LTD
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