Granular rice hull ash heat preservation agent

Abstract

The invention discloses a granular rice hull ash heat preservation agent, which comprises the following components by weight percentage: 39-59% of rice hull ash, 24-48% of coal ash, 5-7% of a binder,and 6-12% of expanded vermiculite. Specifically, the binder is a mixture of lignin, sepiolite, calcium silicate and a rare earth composite thermal insulation material. The granular rice hull ash heatpreservation agent has the advantages of good heat preservation effect, long heat preservation time, good spreadability, small environmental pollution, no adhesion to ladle, no slag falling, no influence on molten steel components and the like.

Description

technical field [0001] The invention relates to metallurgy, in particular to an insulating agent used in steelmaking and ironmaking in the metallurgical industry, a granular rice husk ash insulating agent. Background technique [0002] At present, heat preservation agents with carbonized rice husk or bran husk powder as the main component are widely used in steelmaking and ironmaking fields. For example, Chinese patent application 00123230.4 introduces a granular heat preservation agent for carbonizing the surface of molten steel. This heat preservation agent carbonizes rice husk The content is low, and there are no other light materials, and the specific gravity of the thermal insulation agent pile is heavy, and the thermal insulation effect is not good. At present, there are some shortcomings in the use of powdery carbonized rice husk covering agent with large specific gravity, such as unsatisfactory heat preservation effect, short heat preservation time, powdery carbonize...

AI Technical Summary

Problems solved by technology

[0002] At present, heat preservation agents with carbonized rice husk or bran husk powder as the main component are widely used in steelmaking and ironmaking fields. For example, Chinese patent application 00123230.4 introduces a granular heat preservation agent for carbonizing the surface of molten steel. This heat preservation agent carbonizes rice husk The content is low, and there are no other light materials, and the specific gravity of the thermal insulation agent pile is heavy, and the thermal insulation effect is not good

At present, there are some shortcomings in the use of powdery carbonized rice husk covering agent with large specific gravity, such as unsatisfactory heat preservation effect, short heat preservation time, powdery carbonized rice husk is easy to raise dust, affects the environment, and affects the physical and mental health of operators, etc.