PREPARATION PROCESS OF WATER GRANULATED BLASTFURNACE SLAG HAVING LOW SPECIFIC GRAVITY

摘要

PURPOSE: A preparation method of water granulated blastfurnace slag with a low specific gravity is provided for controlling temperature of high compressed water to provide functional materials having insulation or sound-absorbing functions and to provide construction materials having light weight. CONSTITUTION: Water granulated blastfurnace slag with low specific gravity is prepared by controlling working condition of granulating installation, particularly controlling the temperature of high compressed water to 80-100 deg.C, to cool melted slag and spraying the water toward the slag to produce water granulated blastfurnace slag with low specific gravity. The water granulated blastfurnace slag is obtained as an amorphous material by directly contacting melted slag with high compressed water for rapidly cooling the slag. The obtained slag is useful in a variety of applications such as raw materials of cement or construction materials.