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Process for producing cement grinding aid

A technology of cement grinding aid and production process, which is applied in the field of cement grinding aid production technology, can solve the problems of reducing grinding efficiency, reducing the impact force in the mill, and the phenomenon of sticking balls, and achieving good effects.

Inactive Publication Date: 2017-02-22
SUZHOU XIANGYUAN SPEICAL FINE CHEM
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Problems solved by technology

[0002] In the grinding process of cement, with the increase of grinding time, the fineness and specific surface area of ​​the material increase. When the fineness of the material reaches a certain level, the adhesion between the fine powders increases, which makes the material particles regenerate. The re-healing of the crack weakens the mechanical collision between the steel ball and the clinker and other materials in the grinding mill. Because the qualified fine powder cannot be unloaded outside the mill in time, it is easy to produce a cushion layer, which reduces the impact force inside the mill and repeats the fine powder. Collision, even lead to paste ball phenomenon, thus reducing the grinding efficiency

Method used

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Embodiment Construction

[0011] The present invention will be further explained below in combination with specific embodiments.

[0012] The present invention proposes a kind of cement grinding aid production technology, comprises the following steps:

[0013] S1: Take 500ml of papermaking wastewater, add 40% to 50% milk of lime, then concentrate, purify and dry to obtain wheatgrass alkali lignin;

[0014] S2: Weigh a certain 20-50g of wheatgrass alkali lignin, pour it into a four-necked flask, add a mixture of 60g of water and sodium hydroxide, adjust the pH value of the solution to 12.3±0.1, and heat it to 60-80°C, so that The alkali lignin is completely dissolved, oxidized by adding an oxidizing agent, and heated for 3-4 hours, and the obtained product is a modified alkali lignin product;

[0015] S3: Take the product in S1 and add it into water and stir to form a solution with a concentration of 10%-17%. Use an ultrafiltration machine to classify the solution. The cut-off molecular weight of the ...

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Abstract

The invention provides a process for producing a cement grinding aid. The process comprises the following steps: (S1) weighing 500ml of papermaking wastewater, adding 40% to 50% of lime milk into the papermaking wastewater, then, carrying out concentration, and carrying out purifying and drying, so as to obtain wheat straw alkali lignin. According to the process, the alkali lignin extracted from the papermaking wastewater is applied to the production of the cement grinding aid, so that the obtained grinding aid is good in effect; and the grinding aid is obtained by using wastes, thereby meeting the requirements on energy saving.

Description

technical field [0001] The invention relates to the field of fine chemicals, in particular to a production process for cement grinding aids. Background technique [0002] In the grinding process of cement, with the increase of grinding time, the fineness and specific surface area of ​​the material increase. When the fineness of the material reaches a certain level, the adhesion between the fine powders increases, which makes the material particles regenerate. The re-healing of the crack weakens the mechanical collision between the steel ball and the clinker and other materials in the grinding mill. Because the qualified fine powder cannot be unloaded outside the mill in time, it is easy to produce a cushion layer, which reduces the impact force inside the mill and repeats the fine powder. Collision, even lead to paste ball phenomenon, thus reducing the grinding efficiency. [0003] The national cement output is about 1.4 billion tons. If the application of cement grinding a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/24C08H7/00
CPCC04B24/24C04B2103/52C08H6/00
Inventor 周建颜玉荣
Owner SUZHOU XIANGYUAN SPEICAL FINE CHEM
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