Patent ID: 9290400
Filing Date: 2016-03-22
CPC Classification: C03B,C03C,Y02P,Y10T

Claim Text:
1. Granules, comprising: silica sand; and aluminum oxide; wherein: when the granules are dried to a water content at most 2 mass % are subjected to screening using a sieve having 1 mm openings, a first volume cumulative median diameter D50(c) in a first particle size distribution curve of particles that pass through the sieve is from 350 to 1,000 μm; in a second particle size distribution curve of water-insoluble components of the granules, a proportion of particles exceeding 50 μm in diameter is at most 6 vol %; in the second particle size distribution curve of water-insoluble components of the granules, a 90% volume cumulative particle diameter D90(b2) from a smaller particle size side is at most 45 μm; and a ratio of D90(b2) to a 50% volume cumulative particle diameter D50(b1) from the smaller particle size in the second particle size distribution curve of water-insoluble components of the granules, D90(b2)/D50(b1), is at most 1.9.