Method for preparing superfine magnesium hydroxide sizing agent by wet method

An ultra-fine magnesium hydroxide and magnesium hydroxide technology, applied in magnesium hydroxide and other directions, can solve the problems of potential safety hazards and long processing time, and achieve the effects of easy pumping and storage, high grinding efficiency and reducing dust pollution.

Active Publication Date: 2016-11-16
DSSUN NEW MATERIAL SHANDONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that this method uses absolute ethanol as a solvent to participate in the production, which has potential safety hazards, and the processing time of the product is long, and the final product needs to be dried and pulverized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Select particle diameter to be 50 weight parts of magnesium hydroxide powders of 2.8 microns, add and carry out wet grinding in the small test grinding machine that 1 weight part high-efficiency surfactant, 15 weight parts grinding aids, 70 weight parts water are housed; Grinding medium 400 parts by weight, using 1.0-3.0mm zirconium silicate beads, the true density is 4g / cm 2 , the medium filling rate is 2%; wherein the high-efficiency surfactant is sodium tripolyphosphate solution, the grinding aid is monoethanolamine solution, and after the grinding time is 30 minutes, the particle size of the grinding product is measured by sampling, and the ultrafine hydrogen obtained by grinding In the magnesium oxide slurry, particles smaller than 2 microns account for 80-100% of the total particle volume, and particles smaller than 1 micron account for 50-60% of the total particle volume; Sodium dodecylbenzenesulfonate accounts for 93% and anhydrous sodium metasilicate accounts f...

Embodiment 2

[0033] Select particle diameter as 100 parts by weight of magnesium hydroxide powder of 5.0 microns, add and carry out wet grinding in the small test grinder that 5 parts by weight of high-efficiency surfactant, 15 parts by weight of grinding aid, 100 parts by weight of water are housed; Grinding medium 400 parts, using ceramic beads of 1.0-3.0mm, the true density is 4g / cm 2 , the medium filling rate is 3%; wherein the high-efficiency surfactant is a mixed solution of sodium tripolyphosphate and polyacrylic acid sodium salt, the grinding aid is a mixed solution of monoethanolamine and diethanolamine, and the grinding time is 90 minutes. The particle size of the product, in the superfine magnesium hydroxide slurry obtained by grinding, the particles less than 2 microns account for 80-100% of the total particle volume, and the particles less than 1 micron account for 50-60% of the total particle volume; then add 5 wt. The composite stabilizer of the portion, sodium polyacrylate ...

Embodiment 3

[0035] Select particle diameter to be the magnesium hydroxide powder of 20 microns, add the high-efficiency surfactant that adds 10 weight parts, 30 weight parts grinding aids, 700 weight parts water and carry out wet grinding in the small-scale grinder of water, 600 parts of grinding media , using 1.0-3.0mm zirconium silicate beads, the true density is 4g / cm 2, the medium filling rate is 4%; wherein the high-efficiency surfactant is a mixed solution of sodium hexametaphosphate, polyacrylic acid sodium salt and polycarboxylate, the grinding aid is a triethanolamine solution, and the grinding time is 50 minutes. The particle diameter of product, in the superfine magnesium hydroxide slurry that grinds and obtains, the particle that is less than 2.0 microns accounts for 80-100% of total particle volume, and the particle that is less than 1 micron accounts for 50-60% of total particle volume; Then add 3 weight The composite stabilizing agent of 100000000000000000000000000000000000...

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Abstract

The invention relates to a method for preparing a superfine magnesium hydroxide sizing agent by a wet method. The method comprises the following steps of step 1, adding 1-10 parts by weight of a high efficiency surfactant, and 10-30 parts by weight of a grinding aid to 70-700 parts by weight of water, and performing uniform dispersion for standby application; step 2, weighing 50-150 parts by weight of magnesium hydroxide powder, adding the weighed magnesium hydroxide powder to a solution for standby application in step 1 and performing dispersion so as to prepare a magnesium hydroxide suspension to be ground; step 3, adding 400-600 parts by weight of grinding medium balls to the magnesium hydroxide suspension to be ground in step 2 for grinding until a superfine magnesium hydroxide sizing agent with a target particle diameter is obtained; and step 4, adding 0.1-5 parts by weight of a composite stabilizing additive to the superfine magnesium hydroxide sizing agent in step 3. The method disclosed by the invention is favorable for environmental protection and low in production cost, and under the premise that a high solid content is unchanged, the stability of the magnesium hydroxide sizing agent is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical product preparation, and in particular relates to a method for preparing superfine magnesium hydroxide slurry by a wet method. Background technique [0002] Magnesium hydroxide has been widely studied in recent decades because of its high activity, high adsorption capacity, strong buffer performance, safe use, non-corrosive, non-toxic and many other unique properties, and its rich raw material reserves. Magnesium hydroxide can be divided into three categories: filter cake, powder and slurry according to its shape and use, and the three can be transformed into each other. Among them, the production process of magnesium hydroxide slurry is simple, safe in operation and free from environmental pollution, and is highly respected. Recently, the preparation methods of magnesium hydroxide slurry mainly include magnesium oxide hydration method, brine precipitation method, and brucite wet pulverization m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/14
CPCC01F5/14C01P2004/61C01P2004/62
Inventor 施晓旦王洪伟杨文博廖秀驰
Owner DSSUN NEW MATERIAL SHANDONG
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