METHOD OF CONVERTING ASBESTOS CEMENT INTO A HARMLESS PRODUCT

摘要

PCT No. PCT/EP94/01215 Sec. 371 Date Sep. 8, 1995 Sec. 102(e) Date Sep. 8, 1995 PCT Filed Apr. 19, 1994 PCT Pub. No. WO94/23801 PCT Pub. Date Oct. 27, 1994Asbestos cement may be converted to a harmless product by melting at a melt temperature of 1400 DEG to 1700 DEG C. a blend of 50 to 85% by weight asbestos cement with 15 to 50% by weight of additives that include naturally occurring silicate material such that the total blend has a CaO content of not more than 50%. The melt is discharged from the furnace, cooled and solidified and may be used as aggregate or, generally after solidification as regular units, may be used as part or all of the charge for producing MMV fibre material. It is of particular value for the production of man made vitreous fibre material that has low alumina content and is soluble in lung fluids.