Refractory formed bricks - contg mineral of definite particle size distribution bound with duro plastic material

摘要

wt.% of duro plastic material e.g. furan derivs. is intimately mixed with mineral e.g. quartz sand, basalt shingle, with the following size distribution (size in microns given against percentage residue) 5, 96.7-87.5; 10, 96.0-85.0; 20, 95-0-80.0; 30, 94.0-72.0; 50, 92.7-56.0; 70, 91. 5-42.0; 100, 90.0-23.0; 200, 85.0-0.2; 300, under 80; 500, under 67.0; 700, under 45.0; 900, under 10; 1000, 0.0. comprising =25 vol.%.