Mullite silicon carbide refractory material for production of dry coke and its production

Abstract

A mullite-silicon carbide fire-proofing material for dry extinct coke and its production are disclosed. It consists of metal silicon 3-15%WT, sinter 35-65% or / and capacitance mullite, silicon carbide 25-45%, Al2O3 micro-powder 3-5%alphaand clay 4-10%. The compactness improves by 30-50%, mechanical performance improves by 5-8%, antiknock improves 10-30% and life elongates above 50%.

Description

technical field [0001] The invention relates to a refractory material, especially a mullite-silicon carbide refractory material containing metal silicon for dry quenching. Background technique [0002] In metallurgical coke ovens, inert gas is used to cool and extinguish red coke and recover its heat. Compared with wet coke quenching, it has the advantages of recovering sensible heat of coke, improving coke quality and preventing environmental pollution. CDQ coke ovens are lined with refractory materials for long-term work under high-temperature loads, frequent and severe temperature changes, high-temperature CO, H 2 Under harsh environments such as gas chemical erosion, coke dust erosion and abrasion, etc., and under the action of thermal stress for a long time, if it has to withstand at least 20,000 temperature changes per year, of which about 1,300 times have large temperature differences, so The lining refractory material is prone to cracks, cracks, partial peeling, etc...

AI Technical Summary

Problems solved by technology

However, these materials basically have the common shortcomings of poor thermal shock resistance and short service life, which has become one of the important obstacles affecting the promotion of CDQ technology