Composite abrasion resistant and thermal shock resistant pouring material

A castable and thermal shock-resistant technology, applied in the field of refractory castables, can solve the problem of the service life not meeting customers, and achieve good wear resistance.

Active Publication Date: 2010-03-10
RUITAI MATERIALS TECHNOLOGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the life of these materials still cannot meet customer requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The formula adopted is:

[0037] 5-3mm corundum 30%

[0038] 3-1mm andalusite + mullite 25%

[0039] 1-0.088mm andalusite + mullite 10-20%

[0040] <0.088mm silicon carbide 15%

[0041] <0.020mmα alumina 5%

[0042] Silica fume 5%

[0043] Pure calcium aluminate cement 5%

[0044] Plus:

[0045] Sodium tripolyphosphate and sulfonated naphthalene formaldehyde polymer water reducer each 0.1%

[0046] water 5%

[0047] After compounding, forming, curing, drying and heat treatment, the following performance indicators were measured: 110℃×24h heat treatment: bending resistance 15Mpa, pressure resistance 135Mpa. 1100℃×3h heat treatment, bending resistance 12Mpa, pressure resistance 125Mpa, line change 0.1%. 1500℃×3h heat treatment: bending resistance 12Mpa, pressure resistance 130Mpa, line change +0.2%. Alkali resistance level 1. Abrasion resistance at room temperature 5cm 3 , 1100 ℃ air cooling 7 times the elastic modulus retention rate is 85%.

Embodiment 2

[0049] The formula adopted is:

[0050] 5-3mm corundum 35%

[0051] 3-1mm andalusite + mullite 20%

[0052] 1-0.088mm andalusite + mullite 20%

[0053] <0.088mm silicon carbide 10%

[0054] <0.020mmα alumina 4%

[0055] Silica fume 5%

[0056] Pure calcium aluminate cement 6%

[0057] Plus:

[0058] Sodium hexametaphosphate and sulfonated melamine polymer water reducer each 0.1%

[0059] Water 4.5%

[0060] After matching, forming, curing, drying and heat treatment, the following performance indicators were measured: 110℃×24h heat treatment: bending resistance 16Mpa, pressure resistance 142Mpa. 1100℃×3h heat treatment, bending resistance 13Mpa, pressure resistance 135Mpa, line change 0.15%. 1500℃×3h heat treatment: bending resistance 12Mpa, pressure resistance 130Mpa, line change +0.2%. Alkali resistance level 1. Abrasion resistance at room temperature 5cm 3 , 1100 ℃ air cooling 7 times the elastic modulus retention rate is 80%.

[0061] The configured castable has ...

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Abstract

The invention relates to a composite abrasion resistant and thermal shock resistant refractory pouring material which is prepared by composition of corundum, andalusite, mullite and silicon carbide, and the formula is as follows: 30-40% of corundum of 5-3mm, 15-25% of andalusite and mullite of 3-1mm, 10-20% of andalusite and mullite of 1-0.088mm, 5-20% of silicon carbide of smaller than 0.08mm, 3-8% of alpha aluminum oxide of smaller than 0.020mm, 2-7% of silica fume, 3-8% of pure calcium aluminate cement, 0.05-0.4% of added water reducing agent and 4-6% of added water. The pouring material has the advantages of good abrasion resistance, thermal shock resistance, erosion resistance and high-temperature resistance, low thermal-conductivity and volume stability, thereby being applicable to being used as a refractory material for a kiln mouth of a rotary kiln and a coal nozzle in the cement industry, as well as a circulating fluidized bed and other harsh parts in the power industry.

Description

technical field [0001] The invention is a refractory castable compounded by corundum, andalusite, mullite and silicon carbide, which has good wear resistance, thermal shock resistance, corrosion resistance, high temperature resistance, low thermal conductivity and volume stability, and is suitable for It is used as a refractory material in harsh parts such as the rotary kiln mouth and coal injection nozzle in the cement industry, and the circulating fluidized bed in the power industry. Background technique [0002] The flame temperature in the large-scale new dry-process cement kiln is as high as 2000 °C, the clinker calcination temperature exceeds 1450 °C, and the secondary air temperature entering the kiln is close to 1200 °C. The speed of the new dry process kiln is 3-4r.p.m, much higher than the 1-2r.p.m of the traditional kiln. In addition, the new dry process kiln has a complex dust collection system, and it is difficult for the dust in the kiln adsorbed with volatile...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor袁林张金龙曾鲁举陈雪峰周健李存弼王杰曾
OwnerRUITAI MATERIALS TECHNOLOGY CO LTD