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Nano-SiO2 and nano-CaO composite ceramic bond siliceous refractory castable and preparation method thereof

A technology of refractory castables and composite ceramics, which is applied in the field of refractory materials and can solve the problems of seldom used silicon refractory castables and low performance

Inactive Publication Date: 2010-11-03
高树森
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, compared with silicon bricks, the performance of domestically produced silicon refractory castables is generally low, so silicon refractory castables are rarely used in high temperature thermal equipment

Method used

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  • Nano-SiO2 and nano-CaO composite ceramic bond siliceous refractory castable and preparation method thereof
  • Nano-SiO2 and nano-CaO composite ceramic bond siliceous refractory castable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Listed in embodiment 1 of table 1 according to the present invention, adopt nano-SiO 2 , CaO composite sol suspension combined siliceous refractory castable formula, add the mixture to the forced mixer and dry mix for 1-2 minutes, and then disperse and dilute the SiO with a concentration of 53-58% 2 The aerosol suspension is directly added to the mixing mixer, and the CaO in the mixture undergoes hydration reaction with the added mixed water to generate Ca(OH) 2 The sol solution is mixed with the silicic acid sol suspension to form a composite sol binder, and then wet-mixed for 5 minutes. During the wet-mixing process, 0-1% of water is added according to the actual water requirement of the wet-mixing to make the SiO2 of the present invention 2 and Ca(OH) 2 Composite sol suspension combined with siliceous refractory castable. The biggest feature of silicon refractory castables is that high temperature performance, refractoriness and load softening point are significant...

Embodiment 2

[0036] Listed in embodiment 2 of table 1 according to the present invention, adopt nanometer SiO 2 , CaO composite sol suspension combined siliceous refractory castable formula, add the mixture to the forced mixer and dry mix for 1-2 minutes, and then disperse and dilute the SiO with a concentration of 53-58% 2The aerosol suspension is directly added to the mixing mixer, and the CaO in the mixture undergoes hydration reaction with the added mixed water to generate Ca(OH) 2 The sol solution is mixed with the silicic acid sol suspension to form a composite sol binder, and then wet-mixed for 5 minutes. During the wet-mixing process, 0-1% of water is added according to the actual water requirement of the wet-mixing to make the SiO2 of the present invention 2 and Ca(OH) 2 Composite sol suspension combined with siliceous refractory castable. The siliceous refractory castable in this example has similar characteristics to that in Example 1, but the castable has strong plasticity, s...

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Abstract

The invention relates to a nano-SiO2 and nano-CaO composite ceramic bond siliceous refractory castable and a preparation method thereof. The castable uses nano-SiO2 and nano-CaO composite sol-suspension as nanometer ceramic bonding agent. The preparation method uses quartz, silica, silica fume or water glass as the starting material and adopts the high-energy mechanochemical method, the precipitation method and the sol-gel method; and the prepared sol-suspension is directly added in the mixture under wet mixing to form a nano-structural matrix using SiO2 as the main component through the solation process and prepare the nano-SiO2 refractory castable of the invention. The castable of the invention utilizes the nanometer technology and the nanometer material so as to improve the macroscopicstructure and the microcosmic structure and obviously increase the durability; and the siliceous refractory castable with special high-temperature resistance and crack resistance can be prepared and successfully applied in high-wind-temperature hot stoves, glass smelting kilns, coke ovens and the like.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, in particular to a 2 , CaO composite ceramics bonded silicon refractory castable and preparation method thereof. Background technique [0002] In the past 20 years, the main trend in the development of refractory technology is the continuous increase in the use of monolithic or unshaped refractory materials, especially refractory castables. The output of castables in many countries has exceeded more than half of the total output, especially in Japan. The use of castables in the iron and steel industry has reached 70%, the United States accounts for 53% of the total refractory materials, high-quality and efficient unshaped refractory materials in European countries account for about 50%, while unshaped refractory materials in my country account for only 30%, especially in China. There is a big gap with developed countries in terms of variety and structure and development of new varieti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 高树森
Owner 高树森