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Preparation process of polyglycerol cement grinding aid

A cement grinding aid and preparation technology, which is applied in the fields of ether preparation, dehydration of hydroxyl-containing compounds to prepare ether, organic chemistry, etc., can solve the problems of low grinding efficiency, improve efficiency, improve grinding fineness and specific surface area , moderately priced effect

Inactive Publication Date: 2013-04-03
安徽珍珠水泥集团股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ball mills rely on impact and grinding to achieve crushing of materials. This effect is transmitted to the material particles through the surface of the grinding body to make them crushed. The force of a single material particle is accidental, and a large amount of energy is consumed between the grinding bodies and the grinding body. Collision and wear between the liner and the grinding efficiency is very low

Method used

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  • Preparation process of polyglycerol cement grinding aid
  • Preparation process of polyglycerol cement grinding aid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] ①. Preparation of polyglycerol cement grinding aid:

[0020] The polymerization of polyglycerol, add and reclaim glycerin 15%, NaOH 1%, kerosene 84% (all in weight ratio, the same below) in the reactor, pass N 2 Heating to 140°C under protection, keeping the reaction for 4 hours, calculating the average degree of polymerization n by measuring the refractive index of the reactants, and controlling the average degree of polymerization of polyglycerol to be 5.

[0021] The formula for calculating the average degree of polymerization is:

[0022] d 20 =nD t +0.00026(t-20)

[0023] Y=52480-34330nD 20

[0024] n=(56110×2-18Y) / (74Y-56110)

[0025] where: nD t is the refractive index at temperature t°C, nD 20 is the refractive index at a temperature of 20°C, Y is the hydroxyl value of polyglycerol, and n is the average degree of polymerization of polyglycerol.

[0026] ②. Preparation of polyglycerol cement grinding aid:

[0027] 90% polyglycerol and 10% potassium alum...

Embodiment 2

[0029] ①. Preparation of polyglycerol cement grinding aid:

[0030] For the polymerization of polyglycerol, 18% of recovered glycerin, 3% of NaOH and 79% of kerosene are added to the reactor, and the 2 Heating to 160°C under protection, keeping the temperature for 5 hours, calculating the average degree of polymerization n by measuring the refractive index of the reactants, and controlling the average degree of polymerization of polyglycerol to be 4.

[0031] ②. Preparation of polyglycerol cement grinding aid:

[0032] According to the weight ratio, 95% polyglycerin and 5% potassium aluminum sulfate can be mixed uniformly.

Embodiment 3

[0034] ①. Preparation of polyglycerol cement grinding aid:

[0035] For the polymerization of polyglycerol, 25% of recovered glycerin, 2% of NaOH and 73% of kerosene are added to the reactor, and N 2 Heating to 120°C under protection, keeping the reaction for 6 hours, calculating the average degree of polymerization n by measuring the refractive index of the reactants, and controlling the average degree of polymerization of polyglycerol to be 3.

[0036] ②. Preparation of polyglycerol cement grinding aid:

[0037] According to the weight ratio, 94% polyglycerin and 6% potassium aluminum sulfate can be mixed evenly.

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Abstract

The invention relates to the technical field of cement production, and particularly relates to a preparation process of a polyglycerol cement grinding aid. The polyglycerol cement grinding aid is prepared by mixing 90-95% of polyglycerol and 5-10% of inorganic reinforcer. The polymerization process of the polyglycerol comprises the following steps: adding 15-30% of recovered glycerol, 1-3% of NaOH and 69-84% of kerosene into a reactor, heating to 120-180 DEG C under the condition of introducing N2 for protection, and reacting for 4-8 hours while keeping the temperature, wherein the average polymerization degree n is calculated by determining the refractive index of the reactant, and the average polymerization degree n of the polyglycerol is controlled to be 3-5. According to the invention, the prepared cement grinding aid can change the dispersity of a material in a mill, effectively eliminate electrostatic adsorption and mill bonding phenomena of fine cement particles and optimize the gradation of the cement particles under the condition of not changing the status of the cement grinding mill. The original yield of the grinding mill is kept unchanged, the cement grinding rate and specific area are increased, the 3d strength of the cement is increased by 15%, and the 28d strength is increased by more than 8%. Alternatively, the existing cement grinding rate and specific area are kept, and the yield of the cement grinding mill can be increased by more than 10%.

Description

technical field [0001] The invention relates to the technical field of cement production, in particular to a preparation process of a polyglycerol cement grinding aid. Background technique [0002] The production of cement is a rather complicated process from raw materials and fuels to the delivery of products. To achieve high quality, high yield, and low energy consumption, technical support from all parties is required. However, the core of the cement production process is grinding and firing, commonly known as "two grinding and one firing", that is, raw material grinding, cement grinding and clinker firing. [0003] Raw meal mills and cement mills have long been mainly ground by ball mills. Ball mills rely on impact and grinding to achieve crushing of materials. This effect is transmitted to the material particles through the surface of the grinding body to make them crushed. The force of a single material particle is accidental, and a large amount of energy is consumed ...

Claims

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Application Information

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IPC IPC(8): C04B24/02C07C41/09C07C43/13C04B103/52
Inventor 王传虎武为照周丽李之瑞
Owner 安徽珍珠水泥集团股份有限公司
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