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Cement grinding aid

A cement grinding aid and solvent technology, applied in the field of cement grinding aids, can solve problems such as increasing the production cost of a cement plant, and achieve the effects of saving cement grinding power consumption, reducing dissolution, and improving grinding efficiency

Active Publication Date: 2019-02-15
鸡西市恒昌新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, cement plants use more to reduce the water-soluble Cr in cement 6+ The only way is to use chrome-free refractory bricks, which greatly increases the production cost of the cement plant

Method used

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  • Cement grinding aid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A cement grinding aid, consisting of the following substances by weight fraction: 8% of phosphorous anhydride-ethylene glycol reactant, 3% of polycarboxy compound, 3% of grinding aid, 5% of potassium pyrosulfite, and 0.1% of defoamer %, the balance is water.

[0024] The preparation method of described phosphorous anhydride-ethylene glycol reactant is as follows: add ethylene glycol, phosphorous anhydride (P 4 o 6 ), a catalyst and a reaction solvent, the temperature is raised to 80° C., and the solvent is distilled off under reduced pressure, which is the phosphorous anhydride-ethylene glycol reactant.

[0025] The catalyst is concentrated sulfuric acid.

[0026] The solvent is acetone.

[0027] The molar ratio of ethylene glycol to phosphorous anhydride is 4:1.

[0028] The dosage of the catalyst is 1% of the total weight of ethylene glycol and phosphorous anhydride.

[0029] The polycarboxy compound is trisodium nitrilotriacetate.

[0030] The grinding aid subs...

Embodiment 2

[0033] A cement grinding aid, consisting of the following substances in weight fractions: 12% of phosphorous anhydride-ethylene glycol reactant, 1% of polycarboxy compound, 5% of grinding aid, 1% of potassium pyrosulfite, and 1% of defoamer %, the balance is water.

[0034] The preparation method of described phosphorous anhydride-ethylene glycol reactant is as follows: add ethylene glycol, phosphorous anhydride (P 4 o 6 ), a catalyst and a reaction solvent, the temperature is raised to 40° C., and the solvent is distilled off under reduced pressure, which is the phosphorous anhydride-ethylene glycol reactant.

[0035] The catalyst is anhydrous sodium acetate.

[0036] The solvent is tetrahydrofuran.

[0037] The molar ratio of ethylene glycol to phosphorous anhydride is 12:1.

[0038] The dosage of the catalyst is 5% of the total weight of ethylene glycol and phosphorous anhydride.

[0039] The polycarboxy compound is diethyltriaminepentaacetic acid.

[0040] The grindi...

Embodiment 3

[0043] A cement grinding aid, consisting of the following substances in weight fractions: 10% of phosphorous anhydride-ethylene glycol reactant, 2% of polycarboxy compound, 4% of grinding aid, 3% of potassium metabisulfite, and 0.6% of defoamer %, the balance is water.

[0044] The preparation method of described phosphorous anhydride-ethylene glycol reactant is as follows: add ethylene glycol, phosphorous anhydride (P 4 o 6 ), a catalyst and a reaction solvent, the temperature is raised to 60° C., and the solvent is distilled off under reduced pressure, which is the phosphorous anhydride-ethylene glycol reactant.

[0045] The catalyst is 2-naphthalenesulfonic acid.

[0046] The molar ratio of ethylene glycol to phosphorous anhydride is 8:1.

[0047] The dosage of the catalyst is 3% of the total weight of ethylene glycol and phosphorous anhydride.

[0048] The polycarboxy compound is trisodium hydroxyethyl ethylenediamine triacetate.

[0049] The grinding aid substance is...

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Abstract

The invention belongs to the technical field of cement production, and discloses a cement grinding aid. The cement grinding aid is prepared from the following raw materials in parts by weight: 8%-12%of a phosphite anhydride-ethylene glycol reactant, 1%-3% of a polycarboxy compound, 3%-5% of a grinding aid, 1%-5% of potassium metabisulfite, 0.1%-1% of a defoamer and the balance of water. The cement grinding aid can improve grinding efficiency of cement and also has a good function of reducing water-soluble hexavalent chromium in cement.

Description

technical field [0001] The invention belongs to the technical field of cement production, and in particular relates to a cement grinding aid. Background technique [0002] Cement grinding aid is an admixture added during cement grinding to aid in grinding without harming human health and the performance of cement concrete. Adding grinding aids in the process of cement grinding, on the one hand, can increase the output per hour of the cement mill, thereby directly reducing the power consumption of grinding; on the other hand, it can also stimulate the activity of industrial waste residue and reduce the use of cement clinker amount, thereby saving coal and electricity consumption caused by the production of cement clinker, reducing the emission of air pollutants, improving the utilization efficiency of industrial waste residues, and improving the efficiency of resource utilization, while achieving the effect of "energy saving" , also achieved the purpose of "emission reductio...

Claims

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Application Information

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IPC IPC(8): C04B24/42C04B24/32C04B24/26C04B103/52
CPCC04B40/0039C04B2103/52C04B24/04C04B24/122C04B22/14C04B24/12C04B24/42C04B24/00C04B24/32C04B24/2652
Inventor 刘伟
Owner 鸡西市恒昌新材料科技有限公司
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