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A kind of compound reducing chromium type cement grinding aid and preparation method thereof

A technology of cement grinding aid and chromium aid, which is applied in the field of cement grinding aid, can solve the problems of strict temperature requirements, oxidation, influence on the effect of chromium reduction, etc., and achieves strong oxidation resistance, simple production process, and good chromium reduction. effect of effect

Active Publication Date: 2022-03-11
安徽海螺材料科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The object of the present invention is to provide a kind of compound reducing chromium type cement grinding aid and preparation method thereof, to solve ferrous sulfate and chromium reducing type cement grinding aid in the prior art, due to being exposed in the air, ferrous sulfate and Chromium-reducing cement grinding aids will be gradually oxidized, which will affect the chromium-reducing effect, and there is a technical problem of strict requirements on the use temperature

Method used

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  • A kind of compound reducing chromium type cement grinding aid and preparation method thereof
  • A kind of compound reducing chromium type cement grinding aid and preparation method thereof
  • A kind of compound reducing chromium type cement grinding aid and preparation method thereof

Examples

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Effect test

Embodiment 1

[0044] Preparation of composite reduced chromium cement grinding aid:

[0045] 1.1 Raw materials, the amount of raw materials is shown in Table 1 below:

[0046] Table 1 Embodiment 1 raw material list:

[0047]

[0048] 1.2 Preparation method, comprising the following steps:

[0049] (1) At room temperature, add water to the reaction vessel, add the chromium-reducing additive and stir evenly while stirring; after adding the chromium-reducing additive, stir for 10 minutes at a rotating speed of 65r / min;

[0050] (2) Stop stirring, add alcohol amine and stir evenly; after adding alcohol amine, stir at a speed of 65r / min for 4min.

[0051] (3) Stop stirring, add organic acid and stir evenly. After adding organic acid, stir for 4 minutes at a rotating speed of 65 r / min;

Embodiment 2

[0053] Preparation of composite reduced chromium cement grinding aid:

[0054] 2.1 Raw materials, the amount of raw materials is shown in Table 2 below:

[0055] Table 2 Embodiment 2 raw material list:

[0056]

[0057] 2.2 Preparation method, comprising the following steps:

[0058](1) At room temperature, add water to the reaction vessel, add the chromium-reducing additive and stir evenly while stirring; after adding the chromium-reducing additive, stir for 5 minutes at a rotating speed of 70r / min;

[0059] (2) Stop stirring, add alcohol amine and stir evenly; after adding alcohol amine, stir at a speed of 70r / min for 3 minutes.

[0060] (3) Stop stirring, add the organic acid and stir evenly, after adding the organic acid, stir for 3 minutes at a rotating speed of 70r / min; then get the finished product of the composite reduced chromium cement grinding aid.

Embodiment 3

[0062] Preparation of composite reduced chromium cement grinding aid:

[0063] 3.1 Raw materials, the amount of raw materials is shown in Table 3 below:

[0064] Table 3 Embodiment 3 raw material list:

[0065]

[0066] 3.2 Preparation method, comprising the following steps:

[0067] (1) At room temperature, add water to the reaction vessel, add the chromium-reducing additive and stir evenly while stirring; after adding the chromium-reducing additive, stir at a speed of 60r / min for 15min;

[0068] (2) Stop stirring, add alcohol amine and stir evenly; after adding alcohol amine, stir at a speed of 60r / min for 5min.

[0069] (3) Stop stirring, add the organic acid and stir evenly, after adding the organic acid, stir for 5 minutes at a rotating speed of 60r / min; then get the finished product of the composite reduced chromium cement grinding aid.

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Abstract

The invention provides a composite dechrome cement grinding aid and a preparation method thereof, which solves the problem of ferrous sulfate and chromium depleting cement grinding aids in the prior art. Type cement grinding aids will be gradually oxidized, which will affect the chromium reduction effect, and there is a technical problem of strict requirements on the use temperature. Its preparation comprises the following components by weight: 10-20 parts of alkanolamine; 5-30 parts of chromium-reducing additive; 0.5-8 parts of organic acid; 42-84.5 parts of water. The composite chromium-reducing cement grinding aid prepared by the present invention not only has the grinding aid effect of the grinding aid itself, but also has strong oxidation resistance, is suitable for long-term storage, and can avoid storage being oxidized and affecting the chromium-reducing effect; the finished product is uniform solution, which can avoid the phenomenon of sediment accumulation and easy pump blockage; and has excellent high temperature resistance, which can well adapt to the temperature change of cement working conditions; the production process is simple, easy to operate and quality control, and has obvious technical advantages and a broad market prospect.

Description

technical field [0001] The invention relates to a cement grinding aid, in particular to a composite reduced chromium cement grinding aid and a preparation method thereof. Background technique [0002] Cement is the basic material for national economic construction, and is widely used in industrial construction and civil construction. The water-soluble hexavalent chromium in cement is mainly brought in by limestone, iron tailings, silica-alumina materials, mixed materials and refractory materials in raw materials. Because hexavalent chromium has strong oxidizing and corrosive properties, long-term exposure will cause "skin eczema", and a large amount of intake may even lead to adverse consequences such as cancer and mutation. In the environment of long-term rainwater flushing, it will also cause groundwater quality and soil chromium pollution, resulting in the hidden danger of chromium poisoning. [0003] In order to control the content of water-soluble hexavalent chromium i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/16C04B22/14C04B24/12C04B103/52
CPCC04B40/0039C04B2103/52C04B24/122C04B24/16C04B22/14
Inventor 韩礼熊玉兰余志全吴小波周文杨秀兰李杰
Owner 安徽海螺材料科技股份有限公司
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