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Furnace lining of coal gasifier and preparation method thereof

A technology for coal gasification and furnace lining, applied in the field of furnace lining refractories, can solve the problems of high energy consumption due to over-temperature of furnace shell, enrichment of furnace shell with low temperature medium to corrode furnace shell, etc., so as to reduce energy consumption and avoid cracking and deformation of furnace shell. , to ensure the effect of long life

Active Publication Date: 2017-01-04
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the prior art. The purpose is to provide a method for preparing the lining of a coal gasification furnace. The lining of a coal gasification furnace prepared by the method can automatically adjust the temperature and have a long service life. It can stabilize the temperature of the shell of the coal gasifier and solve the problems of high energy consumption due to overheating of the shell of the coal gasifier and the enrichment and corrosion of the shell by the low-temperature medium of the shell

Method used

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Examples

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Embodiment 1

[0038] A coal gasification furnace lining and a preparation method thereof. The lining of the coal gasification furnace is composed of refractory castables for the working layer and refractory castables for the permanent layer. The thickness of the refractory castable for the working layer is 100-140 mm, and the thickness of the refractory castable for the permanent layer is 200-250 mm.

[0039] The preparation method of the refractory castable for the working layer is as follows: use 35-40wt% calcium hexaaluminate particles and 15-20wt% calcium hexaaluminate-alloy composite particles as aggregate I; use 20-25wt% hexaaluminate Calcium acid fine powder, 4~6wt% α-Al 2 o 3 Micropowder, 0.1~1wt% silica micropowder and 4~6wt% calcium aluminate cement are the base material I. First mix the base material I with polycarboxylic acid evenly, and the polycarboxylic acid is 0.1~0.2wt% of the sum of the aggregate I and the base material I to obtain the premixed base material I; then pre...

Embodiment 2

[0049] A coal gasification furnace lining and a preparation method thereof. The lining of the coal gasification furnace is composed of refractory castables for the working layer and refractory castables for the permanent layer. The thickness of the refractory castable for the working layer is 130-160 mm, and the thickness of the refractory castable for the permanent layer is 160-210 mm.

[0050] The preparation method of the refractory castable for the working layer is as follows: use 40-45wt% calcium hexaaluminate particles and 12-17wt% calcium hexaaluminate-alloy composite particles as aggregate I; use 23-28wt% hexaaluminate Calcium acid fine powder, 4~6wt% α-Al 2 o 3 Micropowder, 0.1~1wt% silica micropowder and 4~6wt% calcium aluminate cement are the base material I. First mix the base material I with polycarboxylic acid evenly, and the polycarboxylic acid is 0.1~0.2wt% of the sum of the aggregate I and the base material I to obtain the premixed base material I; then pre...

Embodiment 3

[0060] A coal gasification furnace lining and a preparation method thereof. The lining of the coal gasification furnace is composed of refractory castables for the working layer and refractory castables for the permanent layer. The thickness of the refractory castable for the working layer is 140-180 mm, and the thickness of the refractory castable for the permanent layer is 110-170 mm.

[0061] The preparation method of the refractory castable for the working layer is: using 45-50wt% calcium hexaaluminate particles and 8-13wt% calcium hexaaluminate-alloy composite particles as aggregate I; using 26-33wt% hexaaluminate Calcium acid fine powder, 4~6wt% α-Al 2 o 3 Micropowder, 0.1~1wt% silica micropowder and 4~6wt% calcium aluminate cement are the base material I. First mix the base material I with polycarboxylic acid evenly, and the polycarboxylic acid is 0.1~0.2wt% of the sum of the aggregate I and the base material I to obtain the premixed base material I; then premixed T...

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Abstract

The invention relates to a furnace lining of a coal gasifier and a preparation method thereof. The technical scheme adopted by the invention is that the furnace lining consists of a working layer refractory castable and a permanent layer refractory castable. The working layer refractory castable comprises the following preparation steps: uniformly mixing calcium hexaluminate fine powder, alpha-Al2O3 micro powder, silicon micro powder, calcium aluminate cement and polycarboxylic acid, then mixing with calcium hexaluminate particles and calcium hexaluminate-alloy composite particles, adding water, stirring and curing. The permanent layer refractory castable comprises the following preparation steps: uniformly mixing corundum fine powder, alpha-Al2O3 micro powder, silicon micro powder, calcium aluminate cement and polycarboxylic acid, then mixing with corundum particles and corundum-alloy composite particles, adding water, stirring and curing. The furnace lining of the coal gasifier, prepared by the preparation method provided by the invention, can automatically adjust the temperature, is long in service life and can effectively solve the problems that a furnace shell of the coal gasifier is ultrahigh in temperature and high in energy consumption and is corroded by the enrichment of low-temperature mediums for the furnace shell.

Description

technical field [0001] The invention belongs to the technical field of furnace lining refractories. Specifically relates to a coal gasification furnace lining and a preparation method thereof. Background technique [0002] The production and operation of metallurgy, building materials, chemical industry, machinery, electric power and other industries are inseparable from various thermal kilns. The life and function of thermal kilns depend to a considerable extent on the quality and structure of lining materials. The lining material of the kiln is an essential basic material to ensure the operation and economic development of the above industries. With the rapid development of the economy, resources and energy are also rapidly consumed. The sustainable development of the social economy puts forward higher requirements for high-temperature lining materials and their application technologies for serving kilns: not only the long life of high-temperature lining materials and the...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 张美杰黄奥顾华志罗志安杨梦
Owner WUHAN UNIV OF SCI & TECH
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