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High molecular synthetic cement grinding aid

A technology for synthesizing cement and grinding aids, which is applied in the field of polymer synthetic cement grinding aids. It can solve the problems of not being able to enhance the later strength of cement, unsatisfactory grinding aid effect, and endangering concrete performance, so as to achieve good development and application prospects and stable coagulation. Hardening time, the effect of improving the utilization rate of waste slag

Active Publication Date: 2015-05-20
安徽海螺材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the grinding aids commonly used in the cement manufacturing industry are mostly NaCl, Na 2 SO 3 The main compounding product will bring more halogen ions into the cement, which will endanger the performance of the concrete. If the amount of the reference is more than 1%, the grinding effect is not ideal. When the output of the cement grinding table is increased by about 10%, it can usually enhance the performance of the concrete. The early strength of cement cannot enhance the later strength of cement

Method used

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Embodiment 1

[0027] 1. Raw material preparation: 55 parts of allyl polyether, 5 parts of sodium methacrylic acid sulfonate, 15 parts of methacrylic acid, 7 parts of acrylamide, 15 parts of self-provided polymeric polyol and 3 parts of initiator ammonium persulfate.

[0028] 2. Polymerized polyol preparation: Mix 3 parts of ethylene glycol, 3 parts of diethylene glycol, 2 parts of triglycerin and 2 parts of sodium fatty acid to obtain a mixed liquid that is a mixed polyol.

[0029] 3. Connect the external device of the pressure reactor, add allyl polyether, sodium methacrylate and acrylamide in proportion to the reactor, heat and stir in a water bath, control the temperature to about 70°C until completely dissolved, and then Add methacrylic acid, polymer polyol and initiator ammonium persulfate dropwise in sequence, and the dropping time is controlled within 2 to 3 hours; after dropping, keep warm for 3 hours, cool to room temperature and add water twice the weight of the product to dilute t...

Embodiment 2

[0031] 1. Raw material preparation: 60 parts of allyl polyether, 5 parts of sodium methacrylate, 10 parts of methacrylic acid, 5 parts of acrylamide, 15 parts of self-provided polymeric polyol and 5 parts of initiator ammonium persulfate.

[0032] 2. Polymerized polyol preparation: Mix 3 parts of ethylene glycol, 3 parts of diethylene glycol, 2 parts of triglycerin and 2 parts of sodium fatty acid to obtain a mixed liquid that is a mixed polyol.

[0033] 3. Connect the external device of the pressure reactor, add allyl polyether, sodium methacrylate and acrylamide in proportion to the reactor, heat and stir in a water bath, control the temperature to about 70°C until completely dissolved, and then Add methacrylic acid, polymer polyol and initiator ammonium persulfate dropwise in sequence, and the dropping time is controlled within 2 to 3 hours; after dropping, keep warm for 3 hours, cool to room temperature and add water twice the weight of the product to dilute to obtain Prod...

Embodiment 3

[0035] 1. Raw material preparation: 50 parts of allyl polyether, 10 parts of sodium methacrylic sulfonate, 10 parts of methacrylic acid, 6 parts of acrylamide, 10 parts of self-provided polymeric polyol and 4 parts of initiator ammonium persulfate.

[0036] 2. Polymerized polyol preparation: Mix 3 parts of ethylene glycol, 3 parts of diethylene glycol, 2 parts of triglycerin and 2 parts of sodium fatty acid to obtain a mixed liquid that is a mixed polyol.

[0037] 3. Connect the external device of the pressure reactor, add allyl polyether, sodium methacrylate and acrylamide in proportion to the reactor, heat and stir in a water bath, control the temperature to about 70°C until completely dissolved, and then Add methacrylic acid, polymer polyol and initiator ammonium persulfate dropwise in sequence, and the dropping time is controlled within 2 to 3 hours; after dropping, keep warm for 3 hours, cool to room temperature and add water twice the weight of the product to dilute to ob...

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Abstract

The invention provides a high molecular synthetic cement grinding aid which is characterized by being prepared from the following raw materials in parts by weight: 45-60 parts of allyl polyether, 5-15 parts of sodium methylallyl sulfonate, 10-15 parts of methacrylic acid, 2-8 parts acrylamide, 10-15 parts of self-prepared polymeric polylol and 2-8 parts of initiator ammonium persulfate. The product provided by the invention can reduce the consumption of grinding bodies in the cement production process, increase the powder selecting efficiency of a powder selecting machine, reduce dust emission, increase the utilization ratio of waste slag, improve the workability and applicability of cement and achieve favorable economic and social benefits; and the specific improvements are as follows: the industrial waste slag adding mount in the cement can be increased by 6-8%, the grinding efficiency can be increased by 10-20%, the three-day strength of the cement can be increased by 2-4 Mpa, and the twenty-eight-day strength can be increased by 3-6 Mpa. Thus, the high molecular synthetic cement grinding aid has favorable development and application prospects.

Description

technical field [0001] The invention relates to a polymer synthetic cement grinding aid, belonging to the technical field of cement process admixtures. Background technique [0002] Cement grinding aid is a chemical additive that improves the grinding effect and performance of cement. It can significantly increase the output per hour of the cement mill, the strength of cement at all ages, and improve its fluidity. Cement grinding aids can greatly reduce the phenomenon of electrostatic adsorption and ball formation during the grinding process, and can reduce the tendency of re-agglomeration of ultrafine particles formed during the grinding process. Cement grinding aids can also significantly improve the fluidity of cement, improve the grinding effect of the mill and the powder selection efficiency of the powder separator, thereby reducing the energy consumption of grinding. Cement produced with grinding aids has a lower tendency to compact and agglomerate, which facilitates ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C04B103/52
Inventor 吕晓罗书占
Owner 安徽海螺材料科技股份有限公司