Periclase-silicon carbide-carbon composite materials and method for preparing same

Abstract

The invention discloses a periclase-carborundum-carbon composite material and preparing method, which comprises the following steps: blending 60-90% electric melting or sintered magnesite, 5-35% carborundum, 2-15 % graphite, 0.5-5% carbon black and 0.5-6% additive; mixing 3-9% binder and 0-1%hexamethylenetetramine hardener; stirring; moulding; baking at 150-350 deg.c for 2-24 h. The invention improves oxidation resistance of material and penetrability and aggressivity resistance of melting waste and metal fusion, which fits melting furnace and container liner widely.

Description

technical field [0001] The invention belongs to the technical field of refractory materials. In particular, it relates to a periclase-silicon carbide-carbon composite material and a preparation method thereof. Background technique [0002] Oxide-non-oxide composite materials are an important direction for the development of refractory materials. Magnesia-carbon refractories have become important refractories for the iron and steel industry. They are made of magnesia and graphite with resin as a binder. Because graphite is not wetted by slag and has high thermal conductivity, carbon composite materials have excellent slag resistance and thermal shock stability, and are widely used in the lining of metallurgical furnaces and containers. In the late last century, the service life of refractory materials was greatly improved, and carbon composite refractory materials played an important role. With the development of pure steel and ultra-low carbon steel production, people's i...

AI Technical Summary

Problems solved by technology

And the existence of carbon in traditional magnesia-carbon materials has also brought some new problems, mainly to the carburization problem of molten steel (Li Nan, the reaction of refractory material and steel and the impact on steel quality, Metallurgical Industry Press, 2005 ), because the carbon in the carbon composite material can dissolve into the molten steel at high temperature, resulting in an increase in the carbon content in the molten steel, thus affecting the quality of the steel

[0003] In the current magnesium-carbon composite refractories, SiC is added as an antioxidant, and the addition amount is generally below 3%. Its function is only to protect the carbon in the carbon composite from being oxidized, and the carbon in the carbon composite will be in the Adding carbon to the molten steel during the smelting process will affect the cleanliness of the molten steel and the quality of the steel