Coated coke esp. petroleum coke to limit gas evolution - with water-glass or milk of lime applied by spraying or impregnation

摘要

Coke (esp. petroleum coke) is coated with a material (I) which is neutral w.r.t. combustion. (I) is water-glass or milk of lime and is applied by spraying or impregnation. Alternatively, the coke may be sprayed with water and then dusted with lime. The particlea size of (I) is pref. no greater than the pore size of the coke. USE/ADVANTAGE - The coated coke is suitable for use as a fuel or reducing agent in shaft furnaces, esp. lime kilns. The coating inhibits gas evolution and delays it to higher temps., which is stated to avoid the following problems: (a) gas evolved to temps. below ca. 400 deg.C is non-flammable; (b) gas contacting cool filters condenses; (c) gas contg. entrained dust particles clogs filters.