PREPARED UNSHAPED REFRACTORY

摘要

PROBLEM TO BE SOLVED: To provide a prepared unshaped refractory capable of reusing more used refractories without carrying out surface modification. SOLUTION: This prepared unshaped refractory is obtained by crushing a used alumina-silica-based refractory having 40-80 wt.% of alumina content and containing a main component of the balance composed of silica and compounding <=60 wt.% of the sum total of <=20 wt.% of the resultant crushed refractory having a particle size within the range of 10-40 mm and <=40 wt.% of the crushed refractory having the particle size within the range of 3-10 mm with a raw material containing 10-20 wt.% of the sum total of an alumina raw material and a silica raw material having <=5 μm average particle diameter, 5-10 wt.% of an alumina cement and the balance of an unused refractory material which is an alumina-silica-based material having <=10 mm particle size.