PURPOSE: To produce a composite slag forming agent for a basic steel making furnace having excellent performance at a low cost without using fluorite by forming a mixture consisting essentially of basic brick scrap and consisting of an accelerator for forming slag. an anti-slaking agent for CaO and a curing agent.
CONSTITUTION: 60W80wt% basic brick scrap of MgO-CaO which is ground to ≤10mm particle size and 5W10wt% respectively of clays such as kaolin, iron oxide such as red oxide, mill scale, slaked lime and carbonaceous raw material such as graphite are mixed, and 3W6wt% a 2W6% borax soln. as an anti-slaking agent and 2W6wt% a satd. MgCl2 soln. as a curing agent are added to 100outer% such mixture. The mixture is thoroughly kneaded and granulated to pellets or is molded to a lumped shape, whereafter the lumped mixture is ground to form a slag forming agent for a basic steel making furnace. Since no fluorite is used, the slag forming agent which keeps the wall bricks of the steel making furnace free from damage by fluorine is produced at a low cost.
WATANABE JIROU
OBARA KENGO
KUROE MASAMI
