Being the pitch content fire-resistant raw materials which consist of the blend to which the carbon content refractory

摘要

The softening point being 70 - the 200C, pitch particle 2 below grain size 30 millimicron, is made the constitution which supports on the surface of fire-resistant raw materials particle 3 below grain size 50 millimicron. These pitch content fire-resistant raw materials 1 do not become firm, the long period of time retaining, the pitch particle cohering, always can use in state of the particulate. By the fact that you use this as portion of raw materials combination, while mixing or mixing it disperses uniformly when pitch has been minute. And as for the carbon content refractory which is produced, corrosion resistance quite is high. Furthermore, while strength level is maintained it can hold down the increase of young's modulus, the effect which even in when to carbon it converts low quite is superior in heatproof spalling characteristic it can obtain.