PREPARATION OF REFRACTORY MATERIALS FROM ASBESTOS TAILINGS

摘要

process for the production of refractory materials, such as high heat resistance, on the basis of the asbestos tailings and calcined products obtained therefrom.the method is to grind the asbestos tailings and the product material until the particles have a particle size suitable for mixing crushed with magnesium oxide or a magnesium oxide precursor, and bring the mixture to a temperature of approximately 1200 degrees c for an appropriate period of time, in order to obtain a product with a high content of forstu00e9rite.the amount of magnesium oxide or its precursor is preferably such that the mgo, sio2 as the starting materials is less than 1.2. typically, this requires an amount on the order of 10 to 25% by weight, based on the weight of the asbestos tailings.in addition, the particle size of the asbestos tailings and calcined products are preferably included in the 1,7mm 0.1mm. the product thus obtained has a refractory melting point above about 1660), and can be used in contact with molten steel or the like, especially when it is mixed with a cross-linking agent such as graphite.