Grinding aid special for phosphorus slag cement and preparation method of grinding aid

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 accelerating the rate of hydration

Active Publication Date: 2019-03-19
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 phosphorous slag cement is prepared from the following parts by weight of raw materials: 5 parts of triethanolamine, 4 parts of ethylene glycol, and 5 parts of modifier; the modifier is prepared by the following steps:

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

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

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

Embodiment 2

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

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

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

[0045] (3) Add 3 parts of mercaptoethanol and 20 parts of deionized water into the stirred tank, stir to dissolve evenly, control the temperature at 25°C, add solution A dropwise to the stirred tank after 30 minutes, and add solution B dropwise after 45 minutes at constant temperature Stir at 25°C for 1.5 hours...

Embodiment 3

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

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

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

[0058] (3) Add 5 parts of mercaptoethanol and 25 parts of deionized water into the stirred tank, stir to dissolve evenly, control the temperature at 25°C, add solution A dropwise to the stirred tank after 30 minutes, and add solution B dropwise after 45 minutes at constant temperature Stir at 25°C for 2 hour...

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PUM

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Abstract

The invention discloses a grinding aid special for phosphorus slag cement and a preparation method of the grinding aid and belongs to the technical field of cement additives. The grinding aid disclosed by the invention is prepared from the following raw materials in parts by weight: triethanolamine, ethylene glycol and a modifier, wherein the modifier is prepared by taking monomethoxy poly ethylene glycol, sodium thiosulfate, sodium methallyl sulfonate, acrylamide, ammonium acetate and deionized water as raw materials. According to the modifier in the grinding aid disclosed by the invention, the retarding group OH in the phosphorus slag cement is reduced, so that the defects that the setting time is long and the early strength increase rate is low are overcome, the early strength and long-term strength are improved, and the hydration rate of tricalcium aluminate and tricalcium silicate is accelerated. During use, when the phosphorus slag cement is doped with 0.1% of the product disclosed by the invention, the strength can be improved by 5-6Mpa, and the setting time can be advanced by about 45 minutes. The grinding aid disclosed by the invention widens application of phosphorus slagin the cement industry, solves a series of environmental problems caused by phosphorus slag emission to a certain degree, and brings obvious social and economic benefits.

Description

Technical field [0001] The invention belongs to the technical field of cement admixtures, and specifically relates to a special grinding aid for phosphorous slag cement and a preparation method thereof. Background technique [0002] Phosphorus slag is a kind of industrial waste slag produced when the electric furnace method is used to produce yellow phosphorus. Usually, about 8-10 tons of phosphorus slag is produced for every 1 ton of yellow phosphorus produced, 3000m 3 The exhaust gas consumes 14,000kWh of electricity and consumes 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 much waste residue is left unused and stored in the open air for many years, the phosphorus, fluorine and toxic elements contained in it will penetrate into the soil and cause environmental pollution. [0003] The chemical composition of phosphorus slag is CaO, ...

Claims

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Application Information

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Patent Type & Authority Applications(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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