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Method for preparing superfine ground calcium carbonate by using wet process

A heavy calcium carbonate, wet ultra-fine technology, applied in dyeing organosilicon compound treatment, dyeing physical treatment, dyeing low molecular organic compound treatment, etc., can solve the problem of no discovery, achieve convenient operation, low production cost, Design scientific and reasonable effects

Inactive Publication Date: 2015-03-25
GUANGXI LISHENG STONE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Through the search of Chinese published patents, 53 calcium carbonate invention patent applications were found; no solution identical to this patent application was found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The preparation method of the wet superfine heavy calcium carbonate of the present invention comprises crushing, pulverizing, grinding, sieving, activating, drying, grading of stones, product collection and packaging; it is characterized in that: coarse calcium carbonate with a diameter less than 1 centimeter Feed into the pulverizer, add 1-3% sodium carbonate, 1-3% dodecyl dimethyl benzyl ammonium chloride respectively in the weight percentage of heavy calcium carbonate coarse powder, at 85~ After grinding to 5-10 microns at 95°C, add water to form a slurry with a solid content of 70% to 80%, based on the weight percentage of heavy calcium carbonate powder, add 1-5% of modifier, and pass through the pump valve Put the slurry into a wet stirring grinding and peeling machine, and grind it in a grinding medium to obtain a modified ultrafine calcium carbonate powder with a particle size of 0.1 to 1 micron; the auxiliary agent, by weight, consists of vinyl tri It consists o...

Embodiment 2

[0011] The preparation method of the wet superfine heavy calcium carbonate of the present invention comprises crushing, pulverizing, grinding, sieving, activating, drying, grading of stones, product collection and packaging; it is characterized in that: coarse calcium carbonate with a diameter less than 1 centimeter Feed into the pulverizer, add 1-3% sodium carbonate, 1-3% dodecyl dimethyl benzyl ammonium chloride respectively in the weight percentage of heavy calcium carbonate coarse powder, at 85~ After grinding to 5-10 microns at 95°C, add water to form a slurry with a solid content of 70% to 80%, based on the weight percentage of heavy calcium carbonate powder, add 1-5% of modifier, and pass through the pump valve Put the slurry into a wet stirring grinding and peeling machine, and grind it in a grinding medium to obtain a modified ultrafine calcium carbonate powder with a particle size of 0.1 to 1 micron; the auxiliary agent, by weight, consists of vinyl tri 1 part of (β-...

Embodiment 3

[0013] The preparation method of the wet superfine heavy calcium carbonate of the present invention comprises crushing, pulverizing, grinding, sieving, activating, drying, grading of stones, product collection and packaging; it is characterized in that: coarse calcium carbonate with a diameter less than 1 centimeter Feed into the pulverizer, add 1-3% sodium carbonate, 1-3% dodecyl dimethyl benzyl ammonium chloride respectively in the weight percentage of heavy calcium carbonate coarse powder, at 85~ After grinding to 5-10 microns at 95°C, add water to form a slurry with a solid content of 70% to 80%, based on the weight percentage of heavy calcium carbonate powder, add 1-5% of modifier, and pass through the pump valve Put the slurry into a wet stirring grinding and peeling machine, and grind it in a grinding medium to obtain a modified ultrafine calcium carbonate powder with a particle size of 0.1 to 1 micron; the auxiliary agent, by weight, consists of vinyl tri It consists o...

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Abstract

The invention discloses a method for preparing superfine ground calcium carbonate by using a wet process. The method comprises the steps of feeding coarse calcium carbonate with the diameter of smaller than 1cm into a pulverizer; respectively adding 1-3% of sodium carbonate and 1-3% of dodecyl dimethyl benzyl ammonium chloride calculated according to the weight percentage of the coarse ground calcium carbonate powder; grinding to be 5-10mu m at the temperature of 85-95 DEG C, and then, adding water to prepare slurry with the solid content of 70-80%; adding 1-5% of a modifying agent calculated according to the weight percentage of the ground calcium carbonate powder; pumping the slurry into a wet-process stirring, grinding and stripping machine through a pump valve; and grinding in a grinding medium to obtain modified superfine ground calcium carbonate with the particle size of 0.1-1mu m. The method is scientific and reasonable in design, simple in process, safe, reliable, easy to control, convenient to operate, suitable for large-scale production, low in production cost and the like.

Description

technical field [0001] The invention belongs to a production method of calcium carbonate powder. Background technique [0002] At present, calcium carbonate has been widely used in papermaking, plastics, plastic films, chemical fibers, rubber, adhesives, sealants, daily chemicals, cosmetics, building materials, coatings, paints, inks, putty, sealing wax, putty, felt packaging, medicine , food (such as chewing gum, chocolate), and feed, its functions include: increasing product volume, reducing cost, improving processing performance (such as adjusting viscosity, rheological properties, vulcanization properties), improving dimensional stability, reinforcing or semi-reinforcing , Improve printing performance, improve physical properties (such as heat resistance, extinction, abrasion resistance, flame retardancy, whiteness, gloss) and so on. There are two kinds of production process of heavy calcium carbonate. Dry production process: First, hand-select calcite, limestone, chal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/12C09C3/10C09C3/08C09C3/04
Inventor 廖煜明李安平廖文成李杰
Owner GUANGXI LISHENG STONE CO LTD
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