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High-chromium fire-resistant slurry

A refractory mud and mud technology, applied in the field of refractory materials, can solve the problems of low strength after burning, long bonding time, no strength, etc., and achieve the effects of moderate bonding time, good high temperature performance and high bonding strength

Active Publication Date: 2008-07-09
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the refractory mud used for masonry lining, no matter imported products or existing domestic products, all have problems such as large water addition, long bonding time, low or even no strength after drying and burning. Brick joints are prone to cracking, erosion, and peeling, making brick joints the most vulnerable part of the entire lining to erosion and damage, which seriously affects the overall life of the Texaco gasifier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Preparation of refractory mud according to mass percentage ratio: α-Al with a particle size of less than 45 μm 2 o 3 2% fine powder, 2% activated alumina fine powder with particle size less than 1μm, 28% chromium oxide green with particle size less than 76μm, 28% fused chromium oxide (<63μm), 30% fused chromium oxide (<280μm), binder is 8% aluminum dihydrogen phosphate and 2% calcium lignosulfonate.

Embodiment 2

[0013] Embodiment 2: Preparation of refractory mud according to mass percentage ratio: 4% of activated alumina micropowder with a particle size of less than 1 μm, 40% of chromium oxide green with a particle size of less than 76 μm, 30% of fused chromium oxide (<63 μm), 30% of fused chromium oxide (< 280 μm) 15%, the binder is 10% aluminum dihydrogen phosphate and 1% ammonium lignosulfonate.

Embodiment 3

[0014] Embodiment 3: Preparation of refractory mud according to mass percentage ratio: 5% of activated alumina micropowder with a particle size of less than 1 μm, 40% of chromium oxide green with a particle size of less than 76 μm, 20% of fused chromium oxide (<63 μm), 20% of fused chromium oxide (< 280 μm) 20%, the binder is 14% aluminum dihydrogen phosphate and 1% sodium lignosulfonate.

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PUM

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Abstract

The invention belongs to the field of refractory material, particularly to high chrome fireproof mud pump. The content of Cr2O3 in the mud pump is larger or equal than 80% by weight, which is the jointing material of masonry of Texaco gasification furnace, the weight percentage of Al2O3 in the mud pump is 2-10%, and the components of Cr2O3 are composed of chromium hemitrioxide green and electric melting chrome oxide and anchoring agent takes 5-15% in the total weight of the fireproof mud pump material. The high chrome fireproof mud pump of the invention sufficiently and uniformly mixes the prepared row materials, and then adds into the mud pump mixer before site production and adds water to stir to the needed density (320-380) of production to be used. Compared with the prior art, the invention has the advantages of small quantity of adding water, medium binding time, high binding strength after drying and sintering, good property in high temperature and the like, which can match well with the high chrome brick and increase the whole lifetime of the Texaco gasification furnace.

Description

technical field [0001] The invention belongs to the field of refractory materials, and mainly relates to a high-chromium refractory mud, which is an important component of refractory materials for coal gasification devices. Background technique [0002] As the international crude oil price continues to rise, the coal-water slurry gasification process that uses relatively cheap coal to produce ethylene, methanol, synthetic ammonia, and power generation can not only make full use of coal, but also is conducive to environmental protection, and has broad market prospects. Texaco coal water slurry pressurized gasifier is currently the most commonly used coal gasification device in China. High chromium refractories with excellent resistance to coal slag erosion are key lining materials for Texaco gasifiers. [0003] The working temperature of Texaco gasifier is usually about 1500℃, the pressure in the furnace is about 5MPa, strong reducing atmosphere, liquid acidic slag, accompan...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/42C04B24/18C04B22/16C04B24/38
Inventor 孙红刚徐延庆范志辉耿可明朱德先张亚栋张涛石鹏坤
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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