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Preparation method of modified ultrafine heavy calcium carbonate

A technology of heavy calcium carbonate and calcium carbonate, which is applied in the field of refractory materials, can solve the problem that heavy calcium carbonate cannot be applied, and achieve the effect of good low temperature resistance and high temperature resistance.

Inactive Publication Date: 2016-09-07
支胜权
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to meet market demand and overcome the problems that heavy calcium carbonate cannot be used at extreme temperatures, the invention provides a method for preparing modified ultrafine heavy calcium carbonate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method for modified superfine ground calcium carbonate, comprising the following steps:

[0029] A, calcite is pulverized to obtain a calcium carbonate coarse material with a diameter below 3mm;

[0030] B. After fully mixing calcium carbonate coarse material, water and dispersant, soak the slurry for 25 minutes;

[0031] C. Put the slurry into a ball mill for wet grinding, add antioxidant and mica powder, the linear speed of the mixer is 1.5m / s, and the grinding time is 15min;

[0032] D, put the slurry into the agitating grinder for wet grinding, the linear speed of the agitator is 6m / s, and the grinding time is 25min;

[0033] E. Put the slurry into a sand mill, add a stabilizer, and carry out wet grinding. The linear speed of the mixer is 10 m / s, and the grinding time is 45 minutes;

[0034] F. The slurry and propylene glycol are spray-dried using spray drying equipment at a drying temperature of 180° C., and the modified ultrafine ground calcium car...

Embodiment 2

[0044] A preparation method for modified superfine ground calcium carbonate, comprising the following steps:

[0045] A, calcite is pulverized to obtain a calcium carbonate coarse material with a diameter below 3mm;

[0046] B. Fully mix the calcium carbonate coarse material, water and dispersant, and soak the slurry for 20 minutes;

[0047] C. Put the slurry into a ball mill for wet grinding, add antioxidant and mica powder, the linear speed of the mixer is 2m / s, and the grinding time is 10min;

[0048] D, put the slurry into a stirring grinder for wet grinding, the linear speed of the mixer is 5m / s, and the grinding time is 30min;

[0049] E. Put the slurry into a sand mill, add a stabilizer, and carry out wet grinding. The linear speed of the mixer is 10m / s, and the grinding time is 40min;

[0050] F. Spray-dry the slurry and propylene glycol with a spray-drying device at a drying temperature of 150-200° C., and collect the modified superfine ground calcium carbonate powd...

Embodiment 3

[0060] A preparation method for modified superfine ground calcium carbonate, comprising the following steps:

[0061] A, calcite is pulverized to obtain a calcium carbonate coarse material with a diameter below 3mm;

[0062] B. Fully mix the calcium carbonate coarse material, water and dispersant, and soak the slurry for 20 minutes;

[0063] C. Put the slurry into a ball mill for wet grinding, add antioxidant and mica powder, the linear speed of the mixer is 1m / s, and the grinding time is 15min;

[0064] D, put the slurry into a stirring grinder for wet grinding, the linear speed of the mixer is 7m / s, and the grinding time is 25min;

[0065] E. Put the slurry into a sand mill, add a stabilizer, and carry out wet grinding. The linear speed of the mixer is 10-12 m / s, and the grinding time is 40-45min;

[0066] F. Spray-dry the slurry and propylene glycol with a spray-drying device at a drying temperature of 150-200° C., and collect the modified superfine ground calcium carbonate...

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Abstract

The invention discloses a preparation method of ultrafine heavy calcium carbonate. Through use of an antioxidant, mica powder and propylene glycol in preparation, the heavy calcium carbonate has the particle size of 0.5-10 microns and strong weatherability, can still be used under ultimate temperature conditions and can be used for multiple industries such as spinning, medicines and coatings.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a ladle brick and a preparation method thereof. Background technique [0002] In recent years, heavy calcium carbonate is a calcium carbonate product obtained by physical methods. Generally, high-purity limestone (such as calcite, chalk, etc.) is used for grinding. The density of heavy calcium carbonate is heavier than that of light calcium carbonate. Lower volume. At present, calcium carbonate has been widely used in papermaking, plastic, plastic film, chemical fiber, rubber, adhesive, sealant, daily chemical industry, cosmetics, building materials, paint, paint, putty, sealing wax, putty, packaging, medicine, food , In feed, its functions include: increasing product volume, reducing cost, improving processing performance, improving dimensional stability, reinforcing or semi-reinforcing, improving printing performance, improving physical properties, etc. [0003] ...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/04C09C3/06C09C3/08
CPCC01P2004/61C01P2004/62C01P2006/32C01P2006/37C01P2006/90C09C1/021C09C1/022C09C3/006C09C3/04C09C3/041C09C3/06C09C3/08
Inventor 蔡振山
Owner 支胜权
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