Preparation method of enhanced polyacrylamide-series cement grinding aid

A technology of polyacrylamide series and cement grinding aid, which is applied in the field of cement production, can solve the problems of low effective components of cement grinding aid, small cement strength enhancement and high cost, and achieves the advantages of promoting continuous hydration, preventing agglomeration and low cost. Effect

Active Publication Date: 2016-06-15
JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most grinding aids are mainly composed of inorganic salts and organic salts. The effective ingredients for cement grinding are too low, and the cost is high, so it is difficult to promote
Patent CN101955332A discloses a polycarboxylate cement grinding aid and its preparation method. The grinding aid first synthesizes a polycarboxylate polymer, and then adds a small amount of alcohol amines to obtain a polycarboxylate cement grinding aid. Grinding agent, this kind of cement grinding aid belongs to high molecular polymer, has good system stability, no salt and no chlorine, will not affect the durability of cement, and has good corrosion resistance to steel bars, but its effect on cement strength is too small

Method used

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  • Preparation method of enhanced polyacrylamide-series cement grinding aid

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Effect test

Embodiment 1

[0019] Preparation of modified alcohol amine: 100g of diethylene glycol amine and 150g of ethylenediamine tetraacetic acid were ultrasonically reacted at 30°C for 120min to obtain modified alcohol amine;

[0020] Preparation of grinding aid: Dissolve 100g of isobutylene polyoxyethylene ether (weight-average molecular weight: 3500) in 400g of water, heat up to 60°C, add 1.2g of hydrogen peroxide, drop a mixed solution of 5g of acrylamide and 20g of water, and simultaneously Add dropwise a mixed solution of 0.5g vitamin C, 1.5g mercaptoacetic acid and 64g water; wherein the dropping time is 2.5h, the holding time is 3h, after the reaction is finished, add 8g sodium dodecylbenzenesulfonate and 1g modified Alcoholamine. That is, an enhanced polyacrylamide cement grinding aid is obtained.

Embodiment 2

[0022] Preparation of modified alkanolamine: 80g of dimethylethanolamine and 144g of ethylenediaminetetraacetic acid were ultrasonically reacted at 35°C for 30min to obtain the modified alkanolamine;

[0023] Preparation of grinding aid: 120g isopentenyl polyoxyethylene ether (weight average molecular weight is 4000) was dissolved in 360g water, the temperature was raised to 55°C, after adding 0.96g ammonium persulfate, 8.4g methacrylamide and The mixed solution of 25.2g water, dropwise the mixed solution of 0.72g vitamin C, 1.44g mercaptopropionic acid and 59.55g water simultaneously; Wherein said dropping time is 2h, and holding time is 4.5h, adds 10.8g ten Sodium dialkylbenzene sulfonate and 2.4 g of modified alcohol amine. That is, an enhanced polyacrylamide cement grinding aid is obtained.

Embodiment 3

[0025] Preparation of modified alcohol amine: 100g of methyldiethanolamine and 200g of ethylenediaminetetraacetic acid were ultrasonically reacted at 40°C for 80 minutes to obtain modified alcohol amine;

[0026] Preparation of grinding aid: Dissolve 100g of 4-hydroxybutyl vinyl ether (weight-average molecular weight: 5000) in 300g of water, heat up to 50°C, add 1.0g of hydrogen peroxide, then add dropwise a mixed solution of 8.5g of caprolactam and 19.8g of water , dropwise the mixed solution of 0.7g sodium bisulfite, 1.8g mercaptoethanol and 60g water simultaneously; Wherein said dropping time is 3h, and holding time is 2.5h, adds 9.5g dodecylbenzene sulfonic acid after reaction finishes Calcium and 3g modified alcohol amine. That is, an enhanced polyacrylamide cement grinding aid is obtained.

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Abstract

The invention relates to a preparation method of an enhanced polyacrylamide-series cement grinding aid. The method includes the following steps: performing a water solution free radical polymerization reaction to unsaturated acrylamide and an unsaturated polyether large monomer under the effects of an initiator and a chain-transfer agent, and then adding alkylbenzene sulfonate and modified alcohol amine to prepare the enhanced polyacrylamide-series cement grinding aid. The grinding aid belongs to high-molecular liquid polymer. By means of addition of active functional groups in the molecular chain, the grinding aid significantly increases early and later strength, increases grinding efficiency, improves cement performance and is simple in processes.

Description

technical field [0001] The invention relates to the technical field of cement production, in particular to a preparation method of an enhanced polyacrylamide cement grinding aid. Background technique [0002] my country is the world's largest cement producer and consumer. The cement production process consumes a lot of energy and resources such as coal mines, limestone and electricity, and emits CO into the air. 2 , SO 2 , NO X Air pollutants such as dust and dust. The biggest power and energy consumption process link in the cement production process is cement grinding, which accounts for about 26% of the cement production cost, and the energy conversion into heat loss rate is as high as 95%. The actual energy used to grind cement clinker is very little. A proper amount of cement grinding aid is mixed into the cement grinding production stage, after surface active adsorption and charge dispersion, and finally modifying the surface of cement material powder particles, it c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/56C08F220/54C08F226/06C04B24/26C04B103/52
CPCC04B24/2658C04B2103/52C08F283/065C08F220/56C08F226/06C08F220/54
Inventor 仇影丁蓓郭兆来郑春扬姜海东王毅王高明
Owner JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
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