VERFAHREN ZUR HERSTELLUNG EINES LEICHTEN BLAEHZUSCHLAGSTOFFES AUS FLUGASCHE

摘要

1349401 Sintered fly ash agglomerates INSTYTUT PRZEMYSLU WIAZACYCH MATERIALOW BUDOWLANYCH W OPOLU 18 June 1971 [23 July 1970] 28652/71 Heading C1A An expanded aggregate material is formed by mixing fly ash with water to form a slurry containing from 30 to 60% by weight of water forming granules from the slurry and calcining the granules at from 900‹ to 1400‹ C. The water may be added in the form of a slurry of silt or clay having at least 30% by weight of its grains on a dry basis of size less than 5 microns and containing at least 35 % by weight water and the granules may be calcined in a rotary kiln. The resulting aggregate has a bulk density of 350 to 900 Kg/cu.m. and a compressive strength of from 8 to 200 Kg/sq.cm. and may comprise spherical granules of diameter 0 to 40 mm. which contain closed internal pores.