Dry process mechanical force and chemical modification method of superfine calcium carbonate

A mechanochemical and calcium carbonate technology, applied in dyeing low-molecular organic compound treatment, dyeing physical treatment, fibrous filler, etc., can solve the problems of high equipment investment cost and complicated process, and achieve simple structure, improved dispersion, The effect of improving flow properties

Inactive Publication Date: 2006-07-19
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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The invention has high equipment inv

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  • Dry process mechanical force and chemical modification method of superfine calcium carbonate
  • Dry process mechanical force and chemical modification method of superfine calcium carbonate
  • Dry process mechanical force and chemical modification method of superfine calcium carbonate

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Embodiment 1

[0020] The method of dry mechanochemical ultra-fine modification of calcium carbonate includes the following steps: First, the fine calcium carbonate powder (∠0.074mm) is dehydrated in a drying oven at 100-110°C, and then the calcium carbonate and modifier are mixed with a mixer Stearic acid is evenly mixed, and the added amount of stearic acid is 0.5-5.0% of the mass of calcium carbonate, and then the mixed materials are added to the jet mill to pulverize to obtain ultra-fine modified calcium carbonate.

[0021] (1) Sample source

[0022] Heavy calcium sample H 1 Taken from the "Superfine Heavy Calcium Carbonate Factory in Western Hubei" in Yidu City, Hubei Province.

[0023] Light calcium sample L 1 Taken from Hubei Puqi "Chibi Yangfan Chemical Co., Ltd.".

[0024] (2) The chemical composition of the sample

[0025]

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Abstract

The related ultrafine modification method for CaCO3 with dry mechanical force and chemical way comprises: dewatering the fine CaCO3 powder in drying tank at 100-110DEG C; mixing the CaCO3 and stearic acid as modifier with mass as 0.5-5.0% of the CaCO3 evenly; loading the mixed material into the jet mill to obtain the target with high activation rate and light CaCO3-2mu m more than 95%. Wherein, the crystal phase structure of the calcite as main mineral phase produces distortion. This invention supplies a gap both at home and abroad.

Description

Technical field [0001] The invention relates to a powder ultrafine modification technology, in particular to a method for chemically modifying calcium carbonate by using mechanical power. Background technique [0002] There are many ways to modify the surface of minerals. Mechanical chemical modification refers to the large amount of mechanical energy applied during mechanical pulverization. In addition to being consumed for particle refinement, there is also a part used to change the crystal lattice and surface structure of the particles, thereby showing activity The mechanical force activation phenomenon that improves the ability to react between phases. The changes in the physical structure and physicochemical properties of particles caused by mechanical forces are called mechanochemical effects. The process of using mechanochemical effects to modify the surface of minerals is called mechanochemical modification. Mechanochemical modification is the addition of modifiers during...

Claims

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Application Information

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IPC IPC(8): C09C3/04C09C3/08C09C1/02
Inventor 杨眉沈上越莫宣学
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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