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Refractory castable and using method thereof

A refractory castable and content technology, applied in the field of refractory castables, can solve the problems of difficulty in control, poor flowability of castables, decreased erosion resistance, etc., and achieves good thermal shock resistance, high strength at medium and high temperatures, and good fluidity. Effect

Inactive Publication Date: 2013-11-20
ANHUI RUITAI NEW MATERIALS TECH
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Problems solved by technology

The vast majority of traditional castables are Al 2 o 3 -SiO 2 It is a castable material, all of which use calcium aluminate cement as a binder, and the calcium oxide in the cement will form anorthite CaO.Al 2 o 3 .2SiO2 2 (melting point 1550°C) and calcium aluminate feldspar 2CaO.Al 2 o 3 .SiO 2 (melting point 1590°C) and other low-melting materials lead to low temperature and high temperature strength of castables and reduced corrosion resistance, and the fluidity of cement-bonded castables is poor, and its curing and hardening time is sensitive to seasonal temperature changes, which is difficult to control and needs to be improved urgently.

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  • Refractory castable and using method thereof

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Embodiment Construction

[0058] The technical scheme of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments:

[0059] Embodiment 1 of the present invention provides a refractory castable, its components and weight percentages include: corundum 5-3mm: 25%-35%; 3-1mm: 10%-20%; 1-0mm: 10%- 20%; 200 mesh: 20% to 30%; activated alumina powder: 1% to 5%; silicon oxide powder: 2% to 7%; cement: 3% to 5%; steel fiber: 1% to 3%; Sodium hexametaphosphate: 0.1% ~ 0.2%; tartaric acid: 0.01% ~ 0.02%; 35% silica gel: water = 1:1:3% ~ 5%. The present invention adopts corundum (brown corundum, dense corundum) as the main aggregate, which has a high melting point (2050° C.), high hardness (Mohs hardness 9), excellent high-temperature mechanical properties, stable chemical properties and good wear resistance.

[0060] The present invention adopts corundum (brown corundum, dense corundum) as the main aggregate, which has a high melting poi...

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Abstract

The invention discloses a refractory castable and a using method thereof. The refractory castable is prepared by taking silica gel / sol as a binding agent and tartaric acid as an accelerating agent and adopting corundum, activated alumina micro powder, 96% of silicon oxide micro powder, pure calcium aluminate cement, steel fibers and an additive. The refractory castable has the characteristics of good flowability, stable curing, shorter curing time, high demoulding, medium temperature and high temperature strength, good thermal shock resistance and the like, and is an excellent refractory material required by thermal equipment in the industries such as metallurgy, machinery, electricity, petrochemistry and construction and by high temperature kilns.

Description

technical field [0001] The invention relates to a refractory pouring material and its application method. Background technique [0002] In order to achieve high density, high strength, and slag resistance of refractory materials to meet the use under high temperature and harsh conditions, the combination system of amorphous refractory materials is developing in the direction of "purification" and "nanoization". The vast majority of traditional castables are Al 2 o 3 -SiO 2 It is a castable material, all of which use calcium aluminate cement as a binder, and the calcium oxide in the cement will form anorthite CaO.Al 2 o 3 .2SiO2 2 (melting point 1550°C) and calcium aluminate feldspar 2CaO.Al 2 o 3 .SiO 2 (melting point 1590°C) and other low-melting materials lead to low temperature and high-temperature strength of castables and reduced corrosion resistance, and the fluidity of cement-bonded castables is poor, and its curing and hardening time is sensitive to seasonal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 张金龙李存弼汪雷董舜杰王杰曾孙涛
Owner ANHUI RUITAI NEW MATERIALS TECH
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