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A kind of special grinding aid for phosphorus slag cement and preparation method thereof

A grinding aid and cement technology, which is applied in the field of special grinding aids for phosphorus slag cement and its preparation, can solve the problems of slow strength increase rate and long setting time of phosphorus slag cement, so as to improve the early and late strength and eliminate over-powdering Grinding phenomenon, the effect of improving grinding efficiency

Active Publication Date: 2021-07-16
SHANDONG HONGYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are almost no special grinding aids developed for phosphorus slag cement in China. The commonly used grinding aids are general-purpose grinding aids, which cannot solve the problems of long setting time and slow early strength growth rate of phosphorus slag cement.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A special grinding aid for phosphorus slag cement is prepared from the following raw materials in parts by weight: 5 parts of triethanolamine, 4 parts of ethylene glycol and 5 parts of a modifier; the modifier is prepared through the following steps:

[0030] (1) Preparation of solution A: Weigh 2 parts of polyethylene glycol monomethyl ether and 1 part of sodium thiosulfate to dissolve in 5 parts of deionized water, stir and dissolve to make A solution;

[0031] (2) Preparation of solution B: Dissolve 1 part of sodium methacrylate, 5 parts of acrylamide, and 2 parts of ammonium acetate in 10 parts of deionized water, and stir to make solution B;

[0032] (3) Add 1 part of mercaptoethanol and 15 parts of deionized water into the stirred tank, stir and dissolve evenly, control the temperature at 25°C, add solution A dropwise into the stirred tank after 30 minutes, add solution B dropwise after 45 minutes, and keep the temperature constant Stir at 25°C for 1 hour to obtai...

Embodiment 2

[0042] A special grinding aid for phosphorus slag cement is prepared from the following raw materials in parts by weight: 18 parts of triethanolamine, 5 parts of ethylene glycol and 8 parts of a modifier; the modifier is prepared through the following steps:

[0043] (1) Preparation of solution A: Weigh 3 parts of polyethylene glycol monomethyl ether and 2 parts of sodium thiosulfate, dissolve them in 8 parts of deionized water, stir and dissolve to make A solution;

[0044] (2) Preparation of solution B: Weigh 2 parts of sodium methacrylate, 12 parts of acrylamide, and 4 parts of ammonium acetate, dissolve them in 12 parts of deionized water, and stir to make solution B;

[0045] (3) Add 3 parts of mercaptoethanol and 20 parts of deionized water into the stirring tank, stir and dissolve evenly, control the temperature at 25°C, add solution A dropwise into the stirring tank after 30 minutes, add solution B dropwise after 45 minutes, and keep the temperature constant Stir at 25...

Embodiment 3

[0055] A special grinding aid for phosphorus slag cement is prepared from the following raw materials in parts by weight: 25 parts of triethanolamine, 6 parts of ethylene glycol and 10 parts of a modifier; the modifier is prepared through the following steps:

[0056] (1) Preparation of solution A: Weigh 5 parts of polyethylene glycol monomethyl ether and 3 parts of sodium thiosulfate, dissolve them in 10 parts of deionized water, stir and dissolve to make A solution;

[0057] (2) Preparation of solution B: Weigh 3 parts of sodium methacrylate, 20 parts of acrylamide, and 6 parts of ammonium acetate, dissolve them in 15 parts of deionized water, and stir to make solution B;

[0058] (3) Add 5 parts of mercaptoethanol and 25 parts of deionized water into the stirred tank, stir and dissolve evenly, control the temperature at 25°C, add solution A dropwise to the stirred tank after 30 minutes, add solution B dropwise after 45 minutes, and keep the temperature constant Stir at 25°C...

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Abstract

The invention discloses a special grinding aid for phosphorus slag cement and a preparation method thereof, belonging to the technical field of cement admixtures. The grinding aid of the present invention is prepared from the following raw materials in parts by weight: triethanolamine, ethylene glycol and a modifier; the modifier is made of polyethylene glycol monomethyl ether, sodium thiosulfate, sodium methacrylate , acrylamide, ammonium acetate and deionized water as raw materials. The modifier in the grinding aid of the present invention reduces the retarding group OH in the phosphorus slag cement, thereby improving the shortcomings of long setting time and low early strength increase rate, improving early and late strength, and accelerating the production of aluminate three Hydration rate of calcium and tricalcium silicate. When in use, the phosphorus slag cement is added with 0.1% of the product of the invention, the strength can be increased by 5-6Mpa, and the setting time can be advanced by about 45min. The grinding aid of the invention expands the application of phosphorus slag in the cement industry, alleviates a series of environmental problems caused by phosphorus slag discharge to a certain extent, and brings significant social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of cement admixtures, and in particular relates to a special grinding aid for phosphorus slag cement and a preparation method thereof. Background technique [0002] Phosphorus slag is a kind of industrial waste produced when yellow phosphorus is produced by electric furnace method. Usually, about 8 to 10 tons of phosphorus slag are produced for every ton of yellow phosphorus produced, 3000m 3 exhaust gas, 14,000kWh of electricity, and about 14 tons of minerals. my country's current yellow phosphorus production capacity is relatively large, and the discharge of phosphorus slag is large, and it is increasing year by year. If so many waste residues are not utilized, they will be piled up in the open air for many years, exposed to wind and rain, and the phosphorus, fluorine and toxic elements contained in them will penetrate into the soil after being watered and cause environmental pollution. [0003] The chem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C04B103/52
CPCC04B40/0039C04B2103/52C04B24/122C04B24/026C04B24/32C04B22/142C04B24/16C04B24/124C04B24/04
Inventor 秦尤敏司宏振宋南京董芹玺李耀王志强冯恩娟张辉
Owner SHANDONG HONGYI TECH
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