Investigation of Effective Parameters on Properties of Dolomite Bricks Containing Different Bonding System

摘要

Pitch and tar bonded dolomite bricks are extensively used in ladles and converters for long time because of their superior properties such as; steel melt refining, easy production as well as low production cost. Recently, resin bonded dolomite bricks are presented for using in steel plants. Generally, quality and final cost of steels are affected by properties of using refractories especially dolomite bricks. Therefore, recognition of effective parameters on dolomite refractory properties is very important. In this study, the effect of tar and resin band as bonding systems, also graphite (2wt%) on the properties of dolomite refractory bricks has been investigated. Properties such as; density and porosity, cold crushing strength, hydration time and depth of slag penetration has been studied. Results show that the bonding systems and graphite have a great effect on the mentioned properties especially cold crushing strength and hydration time. In addition to their low rate of pollution, resin bonded dolomite bricks show higher performance with proper technical specifications.