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Special grinding aid for calcium carbonate powder and use method of special grinding aid

A technology of calcium carbonate powder and grinding aid, applied in chemical instruments and methods, inorganic pigment treatment, dyeing physical treatment, etc., can solve the problems of single performance, poor adaptability, easy desorption, etc.

Active Publication Date: 2020-10-23
HEZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, because ethylene glycol, triethanolamine, and anionic surfactants have short-chain structures and low boiling points, local high temperatures for ultra-fine grinding with D50 stable at 1.8-2.2 μm are likely to cause volatilization and decomposition loss of grinding aids, thereby Reduce milling efficiency and cause environmental pollution; on the other hand, due to the single performance and poor adaptability of ethylene glycol, triethanolamine, anionic surfactants, etc., they cannot form a large enough steric hindrance effect in non-aqueous dispersion systems, resulting in poor stability , so that the hydrophilic group and the particles with low polarity or non-polarity are easy to desorb; in addition, the current grinding aid products are all single components, and the surface structure of calcium carbonate produced by grinding aids is single, which cannot realize differentiated production and restricts High value utilization of calcium carbonate powder
Therefore, the present inorganic powder grinding aids still need to be improved

Method used

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  • Special grinding aid for calcium carbonate powder and use method of special grinding aid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First mix sodium dodecylbenzenesulfonate and monoethanolamine evenly, then add water, the mass ratio of sodium dodecylbenzenesulfonate, monoethanolamine and water is 1:0.5:1, stir evenly, and stand still until there is no Foam is prepared to obtain component A; then cryogenic crushing process is used to crush triglycerides, and after crushing, the powder is collected through a 150-mesh vibrating sieve, and then γ-aminopropyltriethoxysilane with a mass of 0.1% of the powder is added, and stirred Evenly prepared component B.

[0025] Before using the grinding aid prepared by the present invention, add a certain proportion of component A and component B into water and stir, wherein the mass of water is 20 times the sum of the mass of component A and component B, and spray it on the calcite ore after stirring Surface (addition is 0.1% of ore quality), adopt vertical mill to pulverize and prepare 2200 order calcium carbonate powder, the calcium carbonate powder parameter tha...

Embodiment 2

[0041]First, mix sodium benzenesulfonate and diethanolamine evenly, then add water, the mass ratio of sodium benzenesulfonate, diethanolamine and water is 1:10:100, stir evenly, and wait until there is no foam on the surface to prepare component A; then Stearic acid was pulverized by cryogenic pulverization, and the powder was collected through a 150-mesh vibrating sieve, then 0.5% of the powder mass was added to the stearic acid, and the component B was prepared by stirring evenly.

[0042] Before using the grinding aid prepared by the present invention, add a certain proportion of component A and component B into water and stir, wherein the mass of water is 100 times the sum of the mass of component A and component B, and spray it on the calcite after stirring The surface of the ore (the addition amount is 0.2% of the mass of the ore) was pulverized by a jet mill to prepare 3000 mesh calcium carbonate powder.

[0043] Adding the grinding aid increases the output by about 11%...

Embodiment 3

[0048] First, mix sodium lignosulfonate and diglycolamine evenly, then add water, the mass ratio of sodium lignosulfonate, diglycolamine and water is 1:2:8, stir evenly, and let it stand until there is no foam on the surface. Prepare component A; then crush glyceryl monostearate by cryogenic crushing process, collect the powder through a 150-mesh vibrating sieve after crushing, then add γ-aminopropyltriethoxysilane with a mass of 0.2% of the powder, and stir Evenly prepare component B.

[0049] Before using the grinding aid prepared by the present invention, add a certain proportion of component A and component B into water and stir, wherein the mass of water is 50 times the sum of the mass of component A and component B, and spray it on the calcite after stirring The surface of the ore (the addition amount is 0.15% of the mass of the ore) was pulverized by a vertical mill to prepare 2800 mesh calcium carbonate powder.

[0050] Adding the grinding aid increases the output by ...

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Abstract

The invention belongs to the field of grinding aids, and particularly relates to a special grinding aid for calcium carbonate powder and a use method of the special grinding aid. The grinding aid comprises a component A and a component B, wherein the component A is an active substance containing amino groups (or imino groups) and sulfonic groups, and the component B is an active substance containing a C-C long chain. According to the application requirement of the grinding aid product, the component A and the component B are added into water according to a certain proportion and stirred. According to the special grinding aid for calcium carbonate provided by the invention, the grinding aid contains a large amount of active substances, so that efficient grinding aiding and modification canbe simultaneously realized on superfine inorganic powder; in addition, the surface performance of the grinding-aid calcium carbonate can be regulated and controlled by controlling the relative contentof the two components.

Description

【Technical field】 [0001] The invention belongs to the field of grinding aids, and in particular relates to a special grinding aid for calcium carbonate powder and a use method thereof. 【Background technique】 [0002] During the grinding process of calcium carbonate powder, it will go through the cycle process of "crack formation → crack expansion → crack fracture → crack formation". With the circulation of the pulverization process, the particle size of calcium carbonate becomes smaller, and more and more unsaturated valence bonds and structural units with positive and negative charges will be formed on the surface of the microparticles, making the particles in a metastable high-energy state. The specific surface area of ​​the powder is increasing, and the molecular force between the particles is also gradually increasing. When the molecular force increases to a certain extent, the agglomeration phenomenon begins to appear, and the agglomeration phenomenon becomes more promi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/08C09C3/12C09C3/04
CPCC09C1/021C09C3/08C09C3/12C09C3/041C09C3/006C01P2006/12C01P2006/19C01P2006/60C01P2004/61C01P2006/90
Inventor 陈珍明何凤春韦师陈远康刘龙云黄俊俊
Owner HEZHOU UNIV
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