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Sustained-release grinding aid for hard micro-powder

A grinding aid and hard technology, applied in the field of powder preparation, can solve the problems of excessive release speed of liquid grinding aid, affect the grinding efficiency of the mill, and easy volatilization of liquid grinding aid, and achieve double grinding aid function Strong, strong durability of grinding aid performance, and the effect of increasing the cracking rate

Inactive Publication Date: 2008-03-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing powder preparation technology field, when grinding solid particle materials, in order to improve the grinding efficiency of the grinding equipment, reduce unit energy consumption, and improve product quality, it is generally used to add grinding aids (such as grinding aids) to help Grinding agents are divided into solid (powder) grinding aids and liquid grinding aids, liquid grinding aids such as: triethanolamine, acetic acid amine, ethylene glycol, propylene glycol, capric acid, naphthenic acid, etc. or one of them However, the liquid grinding aid is easy to volatilize, that is, the release speed of the liquid grinding aid is too fast and the action time is short. When the liquid grinding aid volatilizes, the grinding aid effect cannot be achieved, which affects the improvement of the grinding efficiency of the mill The unit energy consumption is increased, and the product quality is affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1 (the present invention is applied to the grinding of cement raw meal):

[0013] Hard micropowder slow-release grinding aid, which is mainly composed of liquid grinding aid and hard micropowder carrier through mechanical mixing and full absorption. The parts by weight of each component are: hard micropowder carrier 75 parts, liquid state aid 25 parts of grinding agent; the hard micropowder carrier is sepiolite powder, its specific surface area is greater than that of the cement raw meal to be produced, and its hardness is higher than that of the cement raw meal to be produced. Described liquid grinding aid is glycerol.

[0014] During cement grinding, the hard micropowder slow-release grinding aid produced by squeezing and crushing about 1 / 30 (less than 5%) of the total amount of cement raw meal produced can be added from the grinding head. Experiments show that its effect of increasing production and saving energy is higher than that of pure liquid grindin...

Embodiment 2

[0015] Embodiment 2 (the present invention is applied to the grinding of slag):

[0016] Hard micropowder slow-release grinding aid, which is mainly composed of liquid grinding aid and hard micropowder carrier through mechanical mixing and full absorption. The parts by weight of each component are: hard micropowder carrier 90 parts, liquid state aid 10 parts of grinding agent; the hard micropowder carrier is silicon powder, its specific surface area is not lower than that of the slag powder product to be produced, and its hardness is greater than that of the slag powder product to be produced. The liquid grinding aid is ammonium acetate.

[0017] When grinding slag materials, the hard micropowder slow-release grinding aid is added at the end of the closed-circuit mill with the powder separator returning to the total amount of slag powder products to be produced. Experiments show that its effect of increasing production and saving energy is higher than that of pure liquid grin...

Embodiment 3

[0018] Embodiment 3 (the present invention is applied to the grinding of cement clinker):

[0019] Hard micropowder slow-release grinding aid, which is mainly composed of liquid grinding aid and hard micropowder carrier through mechanical mixing and full absorption. The parts by weight of each component are: hard micropowder carrier 85 parts, liquid state aid 15 parts of grinding agent; the hard micropowder carrier is slag, its specific surface area is larger than that of the cement powder product to be produced, and its hardness is higher than that of the cement powder product to be produced. The liquid grinding aid is a mixture of ethylene glycol and lignin (the mixing ratio of ethylene glycol and lignin is 2:1).

[0020] When the cement clinker is ground, the hard micropowder slow-release grinding aid produced by extrusion and crushing of less than 5% of the total cement powder product can be added from the grinding head. Experiments show that its effect of increasing prod...

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PUM

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Abstract

The invention belongs to the powder preparing technique. The rigid micro powder slow-release grinding aid is characterized in that: it is formed by mechanical mixed liquid grinding aid and rigid micro powder carrier, wherein, each component is in following mass percentages: the rigid micro powder carrier in 50-200 deals, and the liquid grinding aid in 5-45 deals; said rigid micro powder carrier is the slag or rigid mine powder with micro crack or porous structure; the specific surface area of rigid micro powder carrier is not less than the specific surface area of produced powder; the rigidity of rigid micro powder carrier is not less than the one of produced powder. Compared to present common grinding aid, the invention has stable release speed, double grinding aid functions and prolonged grinding aid property. Therefore, it has wider application prospect in power preparation.

Description

technical field [0001] The invention belongs to the technical field of powder preparation, and in particular relates to a grinding aid used in the grinding of solid particle materials, which is suitable for the grinding of cement raw materials, the grinding of cement clinker, and the ultrafine grinding of various minerals , All kinds of slag grinding. Background technique [0002] In the field of existing powder preparation technology, when grinding solid particle materials, in order to improve the grinding efficiency of the grinding equipment, reduce unit energy consumption, and improve product quality, it is generally used to add grinding aids (such as grinding aids) to help Grinding agents are divided into solid (powder) grinding aids and liquid grinding aids, liquid grinding aids such as: triethanolamine, acetic acid amine, ethylene glycol, propylene glycol, capric acid, naphthenic acid, etc. or one of them Mixing, but the liquid grinding aid is easy to volatilize, that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C23/00B02C17/18C09K3/00
Inventor 黄之初张柱银
Owner WUHAN UNIV OF TECH
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