Surface-modified ground calcium carbonate suitable for artificial stone fillers

A ground calcium carbonate, surface modification technology, applied in the field of heavy calcium carbonate preparation, to achieve the effects of large specific surface area, good dispersion and compatibility, and high activation degree

Active Publication Date: 2022-03-11
广西贺州市科隆粉体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a surface-modified heavy calcium carbonate suitable for artificial stone fillers to solve practical problems such as how to develop a new type of modified calcium carbonate, increase the filling amount of calcium carbonate in artificial stone, and reduce the production cost of artificial stone.

Method used

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  • Surface-modified ground calcium carbonate suitable for artificial stone fillers
  • Surface-modified ground calcium carbonate suitable for artificial stone fillers
  • Surface-modified ground calcium carbonate suitable for artificial stone fillers

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preparation example Construction

[0021] The preparation method of surface-modified heavy calcium carbonate suitable for artificial stone fillers comprises the following steps: the ore is washed and crushed, adding auxiliary agent A and auxiliary agent B in a screw conveyor to make a paste, and entering into a grinding equipment for grinding. After classification by the speed classifier, calcium carbonate with a particle size distribution suitable for artificial stone is collected.

[0022] In order to make the calcium carbonate special for artificial stone meet the production requirements, the present invention has screened the optimal additive type, consumption, and the control parameters of the vertical mill, as follows:

[0023] (1) The type and dosage screening research test of the best additive A

[0024] The study found that the type and amount of additive A (titanate coupling agent, silane coupling agent, aluminate coupling agent, zircoaluminate coupling agent) have little effect on the product finenes...

Embodiment 1

[0041] A surface-modified heavy calcium carbonate suitable for artificial stone fillers, comprising the following raw materials: ore, titanate coupling agent, polyacrylamide, and its preparation method includes the following steps: after the ore is cleaned, it is crushed until the particles are less than 28mm , add titanate coupling agent of 1% ore mass and 0.5% ore mass polyacrylamide to the screw conveyor to make a paste and enter the vertical mill grinding equipment for grinding. During grinding, the oil pressure of the grinding roller is 5MPa. Classifier classification, speed classifier speed is 380-400r / min, the collected particle size distribution (D97=100-110 μm, D50=11-12 μm) is suitable for surface modification of artificial stone filler ground calcium carbonate.

Embodiment 2

[0043] A surface-modified heavy calcium carbonate suitable for artificial stone fillers, comprising the following raw materials: ore, titanate coupling agent, polyacrylamide, and its preparation method includes the following steps: after the ore is cleaned, it is crushed until the particles are less than 30mm , add 0.8% titanate coupling agent of ore mass and 0.6% polyacrylamide of ore mass in the screw conveyor to make a paste and enter the vertical mill grinding equipment for grinding. The oil pressure of the grinding roller is 6.5MPa during grinding. Speed ​​classifier classification, the speed classifier speed is 420-430r / min, the collected particle size distribution (D97=70-80 μm, D50=5-6 μm) is suitable for surface modification of artificial stone filler ground calcium carbonate.

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Abstract

The invention discloses a surface-modified heavy calcium carbonate suitable for artificial stone filler, which comprises the following raw materials: ore, auxiliary agent A and auxiliary agent B, and is obtained by controlling specific production parameters by using vertical mill equipment. The present invention adds auxiliary agent A and auxiliary agent B on the basis of existing heavy calcium carbonate, adopts vertical mill to grind, controls through specific production parameters, and the obtained modified calcium carbonate has wide particle size distribution and large specific surface area, High activation degree, low oil absorption value, and application performance are much better than ordinary calcium carbonate. The obtained modified calcium carbonate has good dispersibility and compatibility in the production of artificial stone, and the filling amount of calcium carbonate accounts for more than 81% of the mass of artificial stone. , the production cost is greatly reduced, and it is more environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of heavy calcium carbonate preparation, and in particular relates to a surface-modified heavy calcium carbonate suitable for artificial stone fillers. Background technique [0002] As the latest artificial building material, artificial stone has the incomparable advantages of natural stone such as high strength, high hardness, high temperature resistance, corrosion resistance, anti-aging, easy cleaning, wear resistance, pure material, and no radiation. Today, when natural stone is being depleted as a non-renewable resource, artificial stone is the best substitute. At the same time, artificial stone can use scraps of marble and calcite as raw materials, thus realizing resource reuse while protecting the environment. These advantages make artificial stone an upstart in the architectural decoration industry, and it is widely used in cabinets, bathrooms, floors and wall decorations in offices and large shopping ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B20/02
CPCC04B20/023C04B14/28
Inventor 李奇洪黄华彬唐洋喜叶有胡声琴莫及周琨琪贝进国
Owner 广西贺州市科隆粉体有限公司
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