The lining design of the H furnace is relatively complex. Due to different working conditions such as heat, slag erosion, and thermal shock in different parts, the selection of refractory materials also varies. The selection of refractory materials for the RH furnace lining mainly revolves around the following points: R

High-temperature performance and slag erosion resistance: Direct-bonded magnesia-chrome bricks and their fused rebonded and semi-rebonded series products are currently the mainstream choices, which can meet the requirements for fire resistance, erosion resistance, and volume stability in the area directly in contact with molten steel.

Environmental and process requirements: To meet the requirements of reducing pollution and other working conditions, chromium-free refractories and low-cement or cement-free castables have begun to be used in some parts.

Zonal optimization design: According to the heat load and chemical erosion conditions of different parts of the RH furnace, a comprehensive lining scheme of zonal brick lining and material ratio optimization is often adopted to extend the overall service life.

The iron and steel industry is the main downstream consumption field of refractory materials, accounting for 70% of the demand, followed by the cement, ceramic, chemical and other industries, with demand proportions of 7%, 6% and 4% respectively. It can be seen from this that as a larger consumer industry of refractory materials, the iron and steel industry has a great impact on the development of the refractory material industry.