FUSED CAST REFRACTORIES FOR REHEATING FURNACES

KORVISIT-A

Since 1957, the beginning of the production of fused cast alpha-corundum blocks, KORVISIT-A has been well known as refractory and wear resistant lining of reheating furnaces. KORVISIT-A blocks are successfully used as skid rails as well as soaking zone bottom of heavy duty pusher-type furnaces reheating ingots. Main advantage of KORVISIT-A is its resistance to mechanical effects in warm condition.
KORVISIT-A can be used as supporting element or for lining exit chutes in up-to-date walking beam furnaces. For protection of the traverse beam mechanism against thermal shocks, insulating and refractory masses of the proper quality can be used.

As the material to be heated is moved solely on KORVISIT-A, the less dense and mechanically not so durable monolithics are protected from wear. With the combination of both type of materials it is possible to achieve long furnace campaigns and avoid repairing of the monolithics very often.

KORVISIT-AM

In order to meet changing requirements of the steel industry, we have developed a new product sold under the name KORVISIT-AM. Concerning its composition, KORVISIT-AM is the same material as KORVISIT-A, its production is carried out according to the same technology. The only difference is that KORVISIT-AM blocks undergo a treatment before the annealing process which prevents the formation of a bigger cavity and a porous part forms instead of it. An inner discoloration occurs due to the treatment and the density of the shapes slightly decreases. However, these blocks are less rigid, while their wear resistance does not change and their heat shock and impact resistance improves.