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

A technology of cement grinding aids and alcohol amines, which is applied in the field of cement grinding aids, can solve the problems of affecting the effect of chromium reduction and strict requirements on operating temperature, and achieve high-temperature oxidation resistance, strong oxidation resistance, and excellent high-temperature resistance 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

[0010] The object of the present invention is to provide a kind of reduced chromium type cement grinding aid and preparation method thereof, to solve ferrous sulfate and reduced chromium type cement grinding aid in the prior art, due to being exposed in the air, ferrous sulfate and reduced chromium Chromium 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

Method used

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

Examples

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Effect test

Embodiment 1

[0038] Preparation of chromium-reduced cement grinding aid:

[0039] 1.1 Raw materials, the amount of raw materials is shown in Table 1 below:

[0040] Table 1 Embodiment 1 raw material table:

[0041]

[0042] 1.2 Preparation method, comprising the following steps:

[0043] (1) At normal temperature, add water into the reaction vessel, add inorganic salt under stirring and stir evenly; after adding inorganic salt, stir for 15min at a rotating speed of 65r / min;

[0044] (2) Stop stirring, add alcohol amine and stir evenly; after adding alcohol amine, stir at a speed of 65r / min for 4min.

[0045] (3) Stop stirring, add an organic acid and stir evenly, after adding the organic acid, stir for 4 minutes at a rotating speed of 65 r / min; then the finished product of reduced chromium cement grinding aid is obtained.

Embodiment 2

[0047] Preparation of chromium-reduced cement grinding aid:

[0048] 2.1 Raw materials, the amount of raw materials is shown in Table 2 below:

[0049] Table 2 Embodiment 2 raw material table:

[0050]

[0051] 2.2 Preparation method, comprising the following steps:

[0052] (1) At room temperature, add water into the reaction vessel, add inorganic salt under stirring and stir evenly; after adding inorganic salt, stir for 5 minutes at a rotating speed of 70r / min;

[0053] (2) Stop stirring, add alcohol amine and stir evenly; after adding alcohol amine, stir at a speed of 70r / min for 3 minutes.

[0054] (3) Stop stirring, add an organic acid and stir evenly, after adding the organic acid, stir for 3 minutes at a rotating speed of 70r / min; then the finished chromium-reduced cement grinding aid is obtained.

Embodiment 3

[0056] Preparation of chromium-reduced cement grinding aid:

[0057] 3.1 Raw materials, the amount of raw materials is shown in Table 3 below:

[0058] Table 3 Embodiment 3 raw material table:

[0059]

[0060] 3.2 Preparation method, comprising the following steps:

[0061] (1) At normal temperature, add water into the reaction vessel, add inorganic salt under stirring and stir evenly; after adding inorganic salt, stir for 20min at a rotating speed of 60r / min;

[0062](2) Stop stirring, add alcohol amine and stir evenly; after adding alcohol amine, stir at a speed of 60r / min for 5min.

[0063] (3) Stop stirring, add an organic acid and stir evenly, after adding the organic acid, stir for 5 minutes at a rotating speed of 60r / min; then the finished product of reduced chromium cement grinding aid is obtained.

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Abstract

The invention provides a chromium-reducing cement grinding aid and a preparation method thereof, which solves the problems of ferrous sulfate and chromium-reducing cement grinding aids in the prior art. 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 alcohol amine; 5-15 parts of inorganic salt; 2-20 parts of organic acid; 45-83 parts of water. The chromium-reducing cement grinding aid prepared by the present invention not only has the grinding-aiding 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 a uniform solution , can avoid the phenomenon of sediment accumulation that is easy to cause pump blockage; and has excellent high temperature resistance, and can well adapt to changes in the temperature of cement working conditions; the production process is simple, easy to operate and quality control, with obvious technical advantages and broad market prospects .

Description

technical field [0001] The invention relates to a cement grinding aid, in particular to a chromium-reduced 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 in cement a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/12C04B103/52
CPCC04B40/0039C04B2103/52C04B24/122C04B24/04C04B22/147
Inventor 熊玉兰韩礼张冲吴小波杨秀兰李英周文秦诗
Owner 安徽海螺材料科技股份有限公司
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