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Environment-friendly Al2O3-SiC-Ti3SiC2 castable and preparation method thereof

A castable and environment-friendly technology, which is applied in the field of environment-friendly Al2O3-SiC-Ti3SiC2 castable and its preparation, can solve the problems of complex process, unsuitable for industrial production, poor oxidation resistance of carbon source, etc., and achieve simple process and slag resistance Excellent erosion/permeability and strong oxidation resistance

Pending Publication Date: 2020-10-27
长兴云峰炉料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses graphite as the carbon source to solve the toxic gas generated by the burning of pitch, but the graphite modification process is complicated and is not suitable for industrial production. At the same time, the modified graphite still has not solved the problem of poor oxidation resistance of the carbon source.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An environmentally friendly Al 2 o 3 -SiC-Ti 3 SiC 2 Castable and its preparation method. The specific steps of the preparation method described in this embodiment are:

[0026] Step 1. Environment-friendly Al 2 o 3 -SiC-Ti 3 SiC 2 The raw material composition and content of the castable are: 40-50 parts by mass of brown corundum particles, 18-20 parts by mass of silicon carbide particles, 15-24 parts by mass of silicon carbide fine powder, and 8-16 parts by mass of white corundum fine powder Parts, 4-8 parts by mass of alumina micropowder, 2-6 parts by mass of silica micropowder, Ti 3 SiC 2 Powder is 6-8 parts by mass, calcium aluminate cement is 1-2.5 parts by mass;

[0027] Step 2, mix the raw materials according to the raw material components and their content to obtain a mixture; then add 0.5 to 0.8 wt% polycarboxylate and 4 to 5.5 wt% water to the mixture, and uniformly Stir for 20-30 minutes to prepare environmentally friendly Al 2 o 3 -SiC-Ti 3 SiC...

Embodiment 2

[0030] An environmentally friendly Al 2 o 3 -SiC-Ti 3 SiC 2 Castable and its preparation method. The specific steps of the preparation method described in this embodiment are:

[0031] Step 1. Environment-friendly Al 2 o 3 -SiC-Ti 3 SiC 2 The raw material composition and content of the castable are: 40-50 parts by mass of brown corundum particles, 15-18 parts by mass of silicon carbide particles, 12-20 parts by mass of silicon carbide fine powder, and 10-16 parts by mass of white corundum fine powder Parts, 4-6 parts by mass of alumina micropowder, 2-7 parts by mass of silica micropowder, Ti 3 SiC 2 Powder is 7-10 parts by mass, calcium aluminate cement is 2-3 parts by mass;

[0032] Step 2, mix the raw materials according to the raw material components and their contents to obtain a mixture; then add 0.6-0.9wt% polycarboxylate and 4-5wt% water to the mixture, and stir evenly with a strong mixer 20 to 30 minutes to produce environmentally friendly Al 2 o 3 -SiC-Ti...

Embodiment 3

[0035] An environmentally friendly Al 2 o 3 -SiC-Ti 3 SiC 2 Castable and its preparation method. The specific steps of the preparation method described in this embodiment are:

[0036] Step 1. Environment-friendly Al 2 o 3 -SiC-Ti 3 SiC 2 The raw material composition and content of the castable are: 50-60 parts by mass of brown corundum particles, 15-18 parts by mass of silicon carbide particles, 13-24 parts by mass of silicon carbide fine powder, and 9-15 parts by mass of white corundum fine powder Parts, 4-6 parts by mass of alumina micropowder, 2-7 parts by mass of silica micropowder, Ti 3 SiC 2 Powder is 7-10 parts by mass, calcium aluminate cement is 1.5-3 parts by mass;

[0037] Step 2, mix the raw materials according to the raw material components and their content to obtain a mixture; then add 0.5-0.8wt% polycarboxylate and 4.5-6wt% water to the mixture, and stir evenly with a strong mixer 20 to 30 minutes to produce environmentally friendly Al 2 o 3 -SiC-...

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Abstract

The invention relates to an environment-friendly Al2O3-SiC-Ti3SiC2 castable and a preparation method thereof. According to a technical scheme, the environment-friendly Al2O3-SiC-Ti3SiC2 castable is prepared from the following raw material components: 40-60 parts by mass of brown fused alumina particles, 15-20 parts by mass of silicon carbide particles, 25-35 parts by mass of silicon carbide fine powder or white fused alumina fine powder, 6-12 parts by mass of aluminum oxide micro powder or silicon dioxide micro powder, 6-10 parts by mass of Ti3SiC2 powder and 1-3 parts by mass of calcium aluminate cement. The preparation method comprises the following steps of: mixing the raw materials, and adding polycarboxylate and water to prepare the environment-friendly Al2O3-SiC-Ti3SiC2 castable. According to the environment-friendly Al2O3-SiC-Ti3SiC2 castable and the preparation method thereof, Ti3SiC2 is used for replacing traditional asphalt, the environment-friendly Al2O3-SiC-Ti3SiC2 castablehas the advantages of simple process and environmental friendliness, and the prepared environment-friendly Al2O3-SiC-Ti3SiC2 castable is high in oxidation resistance and molten iron scouring resistance, excellent in slag corrosion resistance / permeability, and high in iron flux.

Description

【Technical field】 [0001] The invention belongs to the field of refractory castables for blast furnace tapping troughs, and in particular relates to an environmentally friendly Al 2 o 3 -SiC-Ti 3 SiC 2 Castable and its preparation method. 【Background technique】 [0002] The progress of iron and steel smelting technology promotes the development of large-scale blast furnaces, followed by the continuous increase of blast furnace smelting intensity, the gradual increase of tapping temperature, and the significant increase of molten iron flow. At present, the tapping time of large-scale blast furnaces is extended, the number of tapping times is more frequent, and the flow rate of molten iron is accelerating, resulting in long-term molten iron erosion and severe slag erosion in the blast furnace tapping trough. Therefore, the harsh service environment of the tap trough of a large blast furnace puts forward higher requirements on the high temperature mechanical properties and s...

Claims

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Application Information

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IPC IPC(8): C04B35/103
CPCC04B35/103C04B2235/3826C04B2235/3843C04B2235/3463C04B2235/3222C04B2235/9676C04B2235/96
Inventor 金金魏军魁许猛夏扬程智道佘丽霞
Owner 长兴云峰炉料有限公司
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