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A kind of preparation method of functional calcium carbonate

A technology of functional calcium carbonate and heavy calcium, applied in the direction of calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc., can solve the problems of high energy consumption, high oil absorption value, and complicated composite methods , to achieve the effect of reducing energy consumption and equipment wear, reducing production energy consumption and cost, and improving stability and controllability

Active Publication Date: 2018-11-06
井陉县华北碳酸钙有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention proposes a preparation method of functional calcium carbonate, which solves the technical problems of cumbersome light calcium and heavy calcium composite methods, large energy consumption and high oil absorption value in the prior art

Method used

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  • A kind of preparation method of functional calcium carbonate
  • A kind of preparation method of functional calcium carbonate
  • A kind of preparation method of functional calcium carbonate

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preparation example Construction

[0036] Such as Figure 1~5 Shown, the preparation method of a kind of functional calcium carbonate that the present invention proposes may further comprise the steps:

[0037] Preparation of heavy calcium: crush and grind the raw material calcite or wollastonite;

[0038] Preparation of light calcium: prepare light calcium according to the crystal form and particle size of heavy calcium;

[0039] Compounding: put the prepared 1-10 parts of heavy calcium and 100 parts of light calcium into the compounding tank and stir evenly;

[0040] Finished product: The compounded product is dehydrated and dried to make a finished product.

[0041] Described light calcium preparation step is specifically,

[0042] Digestion: Digest the raw material calcium oxide and water at a ratio of 1:8;

[0043] Add crystal form control agent: After digestion is completed, add the corresponding crystal form control agent to the slurry according to the heavy calcium crystal form, and stir well;

[0...

Embodiment 1

[0056]The raw material calcite or wollastonite is crushed and ground until it is made into heavy calcium with a particle size of 1200 mesh. Put calcium oxide into water according to the ratio of calcium oxide to water 1:8 for digestion treatment, then add crystal form control agent to the digested slurry and stir well, the added amount is 0.1% of the added amount of calcium oxide. After stirring well, the primary carbonization starts, and the primary carbonization stops when the pH value of the slurry reaches 8.5, and then the slurry is placed in the slurry storage tank for aging. The aging time is 4 hours, and then the secondary carbonization of the slurry is carried out. Stop when the pH value reaches 7.0, and the preparation of light calcium is completed. Among them, the slurry needs to be stirred at a constant speed during the primary carbonization and secondary carbonization, the stirring speed is 100 rpm, the carbonization temperature is 65°, and the carbonization time i...

Embodiment 2

[0059] The raw material calcite or wollastonite is crushed and ground until it is made into heavy calcium with a particle size of 1200 mesh. Put calcium oxide into water according to the ratio of calcium oxide to water 1:8 for digestion treatment, then add crystal form control agent to the digested slurry and stir well, the added amount is 0.2% of the added amount of calcium oxide. After stirring well, the primary carbonization starts, and the primary carbonization stops when the pH value of the slurry reaches 8.5, and then the slurry is placed in the slurry storage tank for aging. The aging time is 4 hours, and then the secondary carbonization of the slurry is carried out. Stop when the pH value reaches 7.0, and the preparation of light calcium is completed. Among them, the slurry needs to be stirred at a constant speed during the primary carbonization and secondary carbonization, the stirring speed is 100 rpm, the carbonization temperature is 65°, and the carbonization time ...

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Abstract

The invention belongs to the technical field of calcium carbonate preparation, and provides a preparation method of functional calcium carbonate. The method comprises the following steps: heavy calcium carbonate preparation: pulverizing the raw material, and grinding; light calcium carbonate preparation: preparing light calcium carbonate according to the crystal form and particle size of the heavy calcium carbonate; and compounding: putting 1-10 parts of the heavy calcium carbonate and 100 parts of the light calcium carbonate into a compounding tank, and stirring uniformly. The light calcium carbonate preparation process comprises the following steps: digestion: putting the raw material calcium oxide into water to perform digestion; addition of crystal form control agent: after the digestion finishes, adding a corresponding crystal form control agent into the slurry according to the crystal form of the heavy calcium carbonate, and evenly stirring; primary carbonization: after evenly stirring, carrying out primary carbonization while stirring the slurry at uniform speed; aging: after the primary carbonization, storing the slurry into a storage tank, and aging; and secondary carbonization: after the aging finishes, carrying out secondary carbonization while stirring the slurry at uniform speed. The method is ingenious in design, and solves the technical problems of complex compounding process, high energy consumption and high oil absorption number in the prior art.

Description

technical field [0001] The invention belongs to the technical field of calcium carbonate preparation and relates to a preparation method of functional calcium carbonate. Background technique [0002] Calcium carbonate is the inorganic filler with the largest amount, the most convenient use and the cheapest price in the plastic industry. Filling modified plastics with calcium carbonate can not only reduce costs and save petroleum resources, but also improve the creep resistance, heat distortion temperature, dimensional stability and molding performance of products. [0003] Calcium carbonate is divided into heavy calcium carbonate (referred to as heavy calcium carbonate) and light calcium carbonate (referred to as light calcium carbonate) according to different production methods. Heavy calcium is made of calcium carbonate ore, namely calcite or marble, through beneficiation, crushing, and grading and packaging. It is carbonized to form calcium carbonate, which is then dehy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18C08K3/26
CPCC01F11/182C01F11/183C01F11/185C01P2004/03C01P2004/61C01P2004/62C01P2006/19C08K3/26C08K2003/265C08K2201/003
Inventor 刘力成刘丽娟康和义
Owner 井陉县华北碳酸钙有限公司
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