Preparation method of specific high-performance wear-resistant castable for coal burner

A high-performance, castable technology, which is applied in the field of preparation of high-performance wear-resistant castables for coal injection pipes, can solve the problems of poor performance such as high temperature resistance, erosion resistance and wear resistance, high concentration of alkali vapor, peeling and corrosion Wear and other problems, to achieve good promotion value and market prospects, safe and reliable quality, good anti-flaking performance

Inactive Publication Date: 2010-08-18
蒋美芳
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AI Technical Summary

Problems solved by technology

Due to the poor performance of high temperature resistance, erosion resistance and wear resistance of the existing wear-resistant castable lining, the lining will be damaged after a short period of use, resulting in shutdown maintenance and a decrease in equipment operation rate
In addition, the castable of the coal injection pipe is often subjected to severe erosion by high-temperature dust-laden airflow, and the temperature of this part changes sharply and the concentration of alkali vapor is large, which makes the castable in this part prone to cracking, peeling, corrosion and wear, etc., resulting in the use of Severely reduced lifespan

Method used

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Embodiment Construction

[0012] The following is an embodiment of the present invention, a preparation method of a special high-performance wear-resistant castable for coal injection pipes, comprising the following steps:

[0013] (1) homogenize the raw materials composed of corundum, silicon carbide, corundum powder, bauxite powder, silica micropowder, pure calcium aluminate cement, stainless steel fiber, explosion-proof fiber and water reducing agent;

[0014] (2) Pour the homogenized raw materials into the forced mixer for mixing. According to the capacity of the mixer, put in the dry material at one time, first dry mix for 2-6 minutes, then add water for wet mixing for 4-8 minutes, and strictly control the water The added amount of the material should be stabilized at 4-5% of the total weight of the raw materials, which not only ensures a certain fluidity, but also ensures the low moisture and high density of the construction body;

[0015] (3) Naturally cured for more than 50 hours at an ambient ...

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Abstract

The invention discloses a preparation method of specific high-performance wear-resistant castable for a coal burner, which comprises the following steps that: (1) raw material which comprises corundum, carborundum, corundum powder, alumina powder, silica micro powder, pure calcium aluminate cement, stainless steel fiber, anti-explosion fiber and water reducing agent is homogenized; (2) the homogenized raw material is poured into a forced mixer to be mixed, dry material is put in at one step according to the capacity of the mixer to be dry mixed for 2 to 6min and added with water to be wet mixed for 4 to 8min, the input of the water is strictly controlled, so that the water is stably 4 to 5 percent of the total weight of the raw material; and (3) the product is naturally cured for more than 50h at 25DEG C of ambient temperature and stripped after being fully hardened. The product prepared by the preparation method is characterized by high temperature resistance, anti-erosion, wear resistance and other performance, and has long service life.

Description

technical field [0001] The invention relates to a preparation method of a special high-performance wear-resistant castable for coal injection pipes. Background technique [0002] In modern dry-process cement lines, the system equipment is constantly increasing, the output of cement clinker is multiplied, the load on the refractory materials used in the system is also increasing, and the use conditions are becoming more and more severe. Only high-performance refractory materials To ensure the normal operation of the production equipment. Due to the poor performance of the existing wear-resistant castable lining body such as high temperature resistance, erosion resistance and wear resistance, the lining body will be damaged within a short time of use, resulting in shutdown and maintenance, and the equipment operation rate is reduced. In addition, the castables in the coal injection pipe are often subjected to severe scouring by high-temperature dust-laden airflow, and the tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 蒋美芳
Owner 蒋美芳
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