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Silicon carbide corundum pouring material

A technology of silicon carbide corundum and castables, which is applied in the field of refractory materials and can solve problems such as cracking and peeling of castables

Inactive Publication Date: 2005-10-19
宜兴市泰科耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, wear-resistant and heat-resistant high-alumina bricks or steel fiber reinforced castables and low-cement high-alumina castables are suitable for kiln mouths, but ordinary or Steel fiber-reinforced corundum castables. The existing corundum low-cement castables have severe cracking and peeling due to the frequent start and stop of the rotary kiln during use, and the service life is only about 5 months.

Method used

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  • Silicon carbide corundum pouring material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1, the ratio of castables is: primary white corundum: 8-5mm 19.8%, 5-3mm 6%, 3-1mm 16%, 1-0mm 21%, corundum 320 mesh fine powder: 13.5%, Al 2 o 3 Micropowder: 5%, SiO 2 Micropowder: 3%, silicon carbide fine powder: 4%, pure calcium aluminate cement: 7%, sodium tripolyphosphate: 0.1%, steel fiber: 2.5%, superplasticizer rare earth: 0.1%, zircon sand: 2 %.

Embodiment 2

[0023] Example 2, the ratio of castables is: primary white corundum: 8-5mm 17%, 5-3mm 10%, 3-1mm 15%, 1-0mm 20%, corundum 320 mesh fine powder: 14%, Al 2 o 3 Fine powder: 6%, silicon carbide fine powder: 3.5%, SiO 2 Micropowder: 4.6%, pure calcium aluminate cement: 7%, sodium tripolyphosphate: 0.2%, steel fiber: 2.5%, superplasticizer rare earth: 0.2%.

Embodiment 3

[0024] Example 3, the ratio of castables is: primary white corundum: 8-5mm 22%, 5-3mm 7%, 3-1mm 12%, 1-0mm 19%, corundum 320 mesh fine powder: 15%, Al 2 o 3 Micropowder: 4%, SiO 2 Micropowder: 3.3%, zircon sand: 3%, silicon carbide fine powder: 4%, ultra-high alumina fused cement: 8%, sodium tripolyphosphate: 0.15%, steel fiber: 2.5%, superplasticizer rare earth: 0.05%.

[0025] The production process of the above-mentioned silicon carbide corundum castable is as follows:

[0026] Stir the silicon carbide, corundum aggregate, and corundum fine powder crushed to the specified particle size in a strong mixer, add other components with a good ratio and continue to stir in the strong mixer, then add an appropriate amount of water to the mixture and stir vigorously. The mixed material is shaped at the furnace site, tamped with a vibrating rod, and used after routine maintenance and baking. See Table 2 for the technical indicators of the silicon carbide corundum castables formul...

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Abstract

The silicon carbide corundum pouring material as a kind of refractory material consists of first grade white corundum, fine corundum powder, alumina powder silica powder, fine silicon carbide powder, cement, sodium tripolyphosphate, steel fiber and RE water reducing agent in certain proportion. The poured refractory material has high strength, high fire resistance and high wear strength, and is suitable for laying various kinds of high temperature industrial furnaces and kilns.

Description

technical field [0001] The invention relates to a refractory material, in particular to a corundum casting material with good high-temperature strength. technical background [0002] The new type dry process kiln, especially the large precalcining kiln, because of the high heat load at the kiln mouth and the rapid cooling impact of the kiln shutdown due to failure, the kiln mouth castable should not only have high temperature resistance, but also have relatively high temperature resistance. Good alkali resistance, abrasion resistance and thermal shock stability. Generally, wear-resistant and heat-resistant high-alumina bricks or steel fiber reinforced castables and low-cement high-alumina castables are suitable for kiln mouths, but ordinary or Steel fiber reinforced corundum castables. The existing corundum low-cement castables have severe cracking and peeling due to the frequent start and stop of the rotary kiln during use, and the service life is only about 5 months. Co...

Claims

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Application Information

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IPC IPC(8): C04B14/06C04B14/30C04B14/32C04B14/36C04B14/48C04B22/16C04B28/06C04B35/66
Inventor 刘财军
Owner 宜兴市泰科耐火材料有限公司
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