Preparation method for wear resistant fire-retardant coating

A technology of refractory coatings and raw materials, applied in the direction of fire retardant coatings, coatings, etc., can solve the problems of water-cooled wall pipe damage, increased consumption of wear-resistant refractory materials, and difficulty in removal, so as to reduce labor intensity, improve work efficiency, and improve The effect of the working environment

Active Publication Date: 2009-11-04
TONGDA REFRACTORY TECH CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high strength of the residual lining, it is difficult to remove it, and it is often easy to cause damage to the water-cooled wall tube, which also increases the consumption of wear-resistant refractory materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] The raw materials of wear-resistant and refractory coatings are tabular corundum, brown corundum and high-quality high-alumina bauxite clinker as aggregates, tabular corundum powder, coke gem powder, α-Al 2 o 3 Micropowder and ceramic powder are fine powders, industrial phosphoric acid solution with a concentration of 42.5%, solid aluminum dihydrogen phosphate and clay powder are used as binders, fused magnesia is used as curing agent, sodium borate and sodium hexametaphosphate are used as burning aids agent, and the dosage is prepared according to the following weight percentages:

[0026] High-quality high-alumina bauxite clinker (Al 2 o 3 content above 92%) particle size 0mm-1mm 22%;

[0027] Tabular corundum powder particle size 0mm-0.045mm 15%;

[0028] Tabular corundum powder particle size 5um 3%;

[0029] Tabular alumina particle size 0mm-1mm 16%;

[0030] The particle size of brown corundum is 6% in 40 mesh;

[0031] Burnt gem powder particle size of 325 ...

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PUM

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Abstract

The invention provides a preparation method for wear resistant fire-retardant coating with simple construction process, good wear resistance and relatively low cost. The raw material of the wear resistant fire-retardant coating selects plate-shaped tabular alumina, brown alumina and high-quality bauxite chamotte as aggregate, selects plate-shaped tabular alumina powder, flint clay powder, alpha-Al2O3 micropowder and ceramic powder as fine powder, selects 42.5 mass percent industrial phosphoric acid solution, solid aluminium dihydrogen phosphate and clay powder as bonding agents, selects fused magnesite as a curing agent and selects sodium borate and sodium hexametahposphate as sintering aids. The wear resistant fire-retardant coating can be directly smeared on the surfaces of a wear resistant fire-retardant material liner and a water cooling wall pipe, fills up technical blank of resisting the wear on metal by using a non metal coating at a high temperature of 900 DEG C, provides a new repairing method for a non metal wear resistant fire-retardant material liner, has simple construction process, can obviously improve working environment of workers, reduce the labor intensity and improve the working efficiency of maintaining a circulating fluid bed boiler heated surface metal pipe wall and the wear resistant fire-retardant material liner.

Description

Technical field [0001] The present invention relates to a preparation method of wear-resistant and refractory coating, in particular, relates to a kind of wear-resistant and refractory coating which can be widely applied to the metal tube wall of the heating surface of circulating fluidized bed boiler and the surface of wear-resistant and refractory material lining. Preparation. Background technique [0002] The circulating fluidized bed boiler is a new type of coal-fired boiler developed from the bubbling bed fluidized furnace. Its working principle is: the coal is broken into particles smaller than 10mm and then sent into the furnace, and there is a large amount of slag or quartz sand in the furnace. , the air is distributed from the lower part of the furnace to make the fuel burn in a "fluidized" state in the slag or quartz sand, and a gas-solid separator is installed at the outlet of the furnace or at the rear of the superheater, and the separated solid particles are sen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/18
Inventor 张海波郑华刘传森李燕京焦成梁田建民孙伙长
Owner TONGDA REFRACTORY TECH CO LTD
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