The invention discloses a novel method used for recycling urban industrial
sludge. The novel method comprises following steps:
water content of urban industrial
sludge obtained via
sewage treatment
plant mechanical
dewatering is reduced to 50 to 65% using a
drying device, wherein an independent heat source or gas
waste heat is adopted by the
drying device as a heat source; the
dewatered sludge, an auxiliary material, and a certain amount of an additive are mixed at a certain ratio, wherein the above materials are delivered into corresponding feed hoppers, and automatic induction weighing machines arranged under the feed hoppers are used for realizing material automatic compounding measuring; an obtained mixture is delivered into a blender for stirring, is conveyed using a conveying belt, and is made into material balls via twisting; the material balls are delivered into a
rotary kiln with a certain gradient for
calcination, wherein with rotating of the
rotary kiln, the material balls roll to a
kiln head, 2mm
bran is sprayed into the
rotary kiln for
combustion, and the material balls are transformed into ceramsite via
calcination in the
kiln; and at last the obtained ceramsite is subjected to
drying, natural cooling, sieving and grading, and finished product pre-delivery inspection. The novel method possesses following advantages: waste
sludge is changed into valuable things, sludge treatment mode is widened, and sludge is cheap, so that enterprise cost is reduced.