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Usually kiln material filling coefficient 6%-15%. When the kiln material flow stability, moving speed zone, small filling coefficient. In actual production, in order to stabilize the kiln thermal system, must stabilize kiln speed, if by calcining kiln speed and reduce adverse, must be correspondingly reduced feeding rate, to ensure that the rotary kiln material filling coefficient constant.
Calcining zone. Calcined with the central region, about 1/2 of the total length of its length about the kiln in the kiln. Calcining zone is a key area, bored by the high temperature calcined material in this region is heated to 1200-1350 degrees. From the calcined with the end of a section of the kiln hood called the cooling zone. Material in cooling machine with cooling, the temperature gradually decreased to 800-900 degrees, and then drop into the cooling kiln. Cooling with a short 30m long kiln, cooling with only about 5m.
Kiln material thickness is different, the material to be brought up to the height of. Material thickness, is brought up to the height of the great revolution, in a rotary kiln, material to be brought up to the number, namely turning less, heating uniformity is poor; but the material layer thin kiln yield is low, it must choose a suitable material thickness.
The fuel sprayed into the rotary kiln head and the material in high temperature combustion of the volatile components in the kiln. Of kiln temperature distribution, roughly divided into three temperature zones.Preheating zone. Preheating zone is the beginning of a period of kiln inlet. Kiln inlet above the feeding tube into the material in this interval by the head combustion gases flow over the preheat and dry. Kiln end containment of 800-900 degrees.
That the lime in the lime kiln, lime ground lime, forming a natural ratio there is no need to add a variety of lime, so that plus a big lime on the line. Does not know that lime size is too large will cause unnecessary energy consumption, but also affect the productivity of the grinding. This do a good job in the mill balanced to complement the lime is very important.
horizontal lime kiln: http://www.china-ore-beneficiation.com/ournews/n261.html