Granular charring rice husk thermal insulation agent

A technology of carbonizing rice husks and heat-insulating agents, which is applied in the field of metallurgy, and can solve problems such as inability to remove, heavy heat-insulating agent pile specific gravity, and white spots on billets, and achieve the effects of no dust pollution, good heat preservation effect, and low crystal water content

Inactive Publication Date: 2008-02-20
上海盛宝冶金科技有限公司
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AI-Extracted Technical Summary

Problems solved by technology

[0002] At present, carbonized rice husk powder is commonly used as ladle insulation agent in steel mills. Carbonized rice husk powder is popular because of its good thermal insulation effect and low cost. High dust content, affecting the environment and the health of workers
Chinese patent application 00123230.4 introduces a carbonized thermal insulation agent on the surface of granular molten steel. The carbonized rice husk content of this thermal insulation agent is low, less than 50%, and there are no other light materials, which causes the specific gravity of the thermal insulation agent to be heavy, which affects the thermal insulation effect.
Generally, if the content of carbonized rice husk is high, it is difficult to effectively bond it into granules without affecting the quality of mol...
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Abstract

The invention relates to metallurgy field, in particularly to a granular carbonizing rice husk thermo to insulating agent used in iron and steel melting progress. The invention is characterized in that: the thermo of the insulating agent consists of 45 to 80 percent carbonizing rice husk, 10 to 30 percent binder and 1 to 30 percent filling material. The binder refers to one of or a combination of at least two components among amylum, caustic soda flake, bentonite, white putty waterglass, sodium carboxymethyl cellulose (CMC), phosphoaluminate cement and silicate cement. The thermo-insulating agent contains comparatively high carbonizing rice husk, and effectively bonds the carbonizing rice husk into granule shape while at the same time avoids the adoption of calcareousness and dolomite, so as to preserve insulation property of the thermo-insulating.

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Example Embodiment

[0011] The features of the present invention and other relevant features are described in further detail below through the embodiments, so as to facilitate the understanding of those skilled in the art:
[0012] Reality
[0013] After mixing the above components, roll them into balls in a disc granulator, or extrude them into cylinders, and dry them at a temperature of 80°C-250°C. The particle size of the above-mentioned expanded perlite and other filling materials is ≤1mm .
[0014] In the above embodiments, the carbonized rice husks are effectively bonded together into granules by using a high proportion of carbonized rice husks in combination with various fillers and various binders. Tests show that the product has a bulk density of less than 0.6 and a melting point of around 1400°C.
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Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Classification and recommendation of technical efficacy words

  • Good insulation effect
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