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Periclase-olivine light thermal-insulated fireproof materials and method for preparing same

A technology of refractory materials and production methods, which can be applied to other household appliances, applications, household appliances, etc., and can solve problems such as low melting phase, non-alkali light insulation material technology, and impact on service life

Inactive Publication Date: 2005-12-07
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current insulation materials belong to Al 2 o 3 -SiO 2 It is an acidic or neutral material, which is easy to react with alkaline materials at high temperature, resulting in low melting phase, which affects the service life
Only the use of alkaline lightweight insulation materials can match with alkaline refractory materials, but there is no alkaline lightweight insulation material technology at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] A production method of periclase-olivine lightweight thermal insulation refractory material: magnesite fine powder with a particle size of ≤44 μm, light-burned magnesia with a particle size of ≤88 μm, silicon oxide powder with a particle size of ≤44 μm, and 150μm sawdust powder is mixed according to the weight ratio of 20-80%, 0-50%, 15-25%, 0-10%, and 4-10% of water is added to stir evenly, and the material is trapped for 24 hours, and pressed by hand forming. Dry naturally in air for 24 hours, dry at 110°C for 8 hours, and fire at 1300-1400°C. Available volume density is 1.0~1.9g / cm 3 , Alkaline thermal insulation lightweight thermal insulation material with apparent porosity of 30-70%.

Embodiment 2

[0012] A production method of periclase-olivine lightweight thermal insulation refractory material: magnesite fine powder with a particle size of ≤88 μm, light-burned magnesia powder with a particle size of ≤88 μm, silicon oxide powder with a particle size of ≤44 μm, and ≤44μm coke powder, mixed according to the weight ratio of 20~70%, 0~40%, 20~30%, 0~15%, add 2~10% water and 0.2% dextrin, stir evenly, use friction Brick press molding. Dried at 110°C for 8 hours in a dryer, and fired at 1350-1400°C. Available bulk density is 1.4~1.7g / cm 3 , Alkaline light-weight thermal insulation refractory material with apparent porosity of 40-60%.

Embodiment 3

[0014] A production method of periclase-olivine light-weight thermal insulation refractory material: magnesite powder with a particle size of ≤44 μm, light-burned magnesia powder with a particle size of ≤44 μm, silicon oxide powder with a particle size of ≤88 μm, and 15μm silica powder, anthracite coal powder with a particle size of ≤44μm, and polylight balls with a particle size of ≤200μm are respectively 20-80%, 0-25%, 8-25%, 2-8%, 0-6% by weight , 0-1% mixed, plus 2-8% water and stirred evenly. Then shape it on a friction press, dry it on a kang at 40-50°C for 48 hours, and burn it at 1300-1400°C to obtain a bulk density of 1.3-1.6g / cm 3 , Alkaline lightweight thermal insulation material with apparent porosity of 40-60%.

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Abstract

The invention relates to Periclase-olivine light thermal-insulated fireproof materials and method for preparation, which comprises mixing 20-80% magnesite powder, 0-50 wt% of magnesium oxide powder, 10-30% of silicon oxide powder, 0-15% of combustible powder, 0-3% of anchoring agent, and 4-10% of water, mixing homogeneously, press forming, drying the formed blank 4-24 hours at 110 deg. C, then burning at 1300-1500 deg. C, thermally insulating 1-8 hours.

Description

1. Technical field [0001] The invention belongs to the field of lightweight thermal insulation refractory materials. In particular, it relates to a production method of periclase-olivine light-weight thermal insulation refractory material. 2. Background technology [0002] Most of the existing lightweight thermal insulation refractory materials are aluminum-silicon materials, and the main chemical composition is Al 2 o 3 with SiO 2 , the main phases are corundum, mullite, quartz phase and glass phase. With the improvement of steel quality and variety requirements, the requirements for steel purity are getting higher and higher. Basic refractories are considered to be an ideal refractory material that can meet the requirements of pure steel production. In general, basic refractory materials, such as magnesia bricks, are directly used as furnace lining materials that are in direct contact with molten steel, and a layer of thermal insulation material is required on the out...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 李楠
Owner WUHAN UNIV OF SCI & TECH
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