The grain controling method of silica brick is very effective for the improvement of the properties of silica brick.
In this report, as first step, the meaning and the method of grain controling is explained and next, the application of this method to the manufacture of silica brick is being treated.
As a result of studies, it was understood that the grain controled silica bricks have the following properties.
1. Low porosity: very available for the roof brick of the open hearth furnace.
2. High resistance to spalling: very available for the roof brick of the electric furnace as intermitted operation.
3. High resistance to abrasion: very available for the inside brick of the rotary kiln.
4. High viscosity in the melting state: very available for the utilization of the second class raw materials.