The Working Principle of Lime Vertical Kiln

As an important industrial raw material, lime is widely used in construction, metallurgy, chemical industry, light industry, environmental protection and other fields. Early lime production is completed by earth kiln and lime vertical kiln arise with the industrial development of the mechanical. The emergence of mechanical lime shaft kiln promotes the progress of production technology, at the same time, earth kilns are facing a situation of being phased out.
Lime vertical kiln is a cylindrical kiln, its supporting mechanical engineering can be broadly divided into six parts-feeding proportioning system, feeding system, grey system, air distribution system, air system and electrical control system. Raw limestone and coal conforming to the requirements of the lime kiln process are transported by belt to warehouse and coal bunker. The feeding system comprises a material conveying, a lifting and a material feeding system and bucket metering, single bucket elevator is generally selected. Single bucket elevator generally contains vertical, inclined, vertical shaft and multi - point type, etc. The inclined single bucket elevator is the most widely used, which has the advantages of simple structure, reliable operation, convenient weighing。
Limestone and coal device into the middle of the bucket by vibrating feeder and metering. then Limestone and coal come into the mixing hoppemn through vibration feeder. After mixing, limestone and coal enter into the charging carriage, then arrive to the furnace through cloth feeder after being into the bunker on the top of the kiln by winding system. The kiln from top to bottom is divided into three areas: preheating zone, calcining zone and cooling zone according to the temperature change and the distribution of lime shaft kiln. In the pre tropical, material preheats with the heat of flue gas. In the calcination zone, the material is calcined by the heat released by the fuel burning. In the cooling zone, The calcined material and the cold air drumed in exchange the heat, the material itself is cooled and the heated air enters the calcining zone as combustion air. In order to ensure the material calcining process paragraphs fully complete, lime shaft kiln in three zones should be maintained a certain height, and strives to achieve stability. There are two kinds of reasons to cause motion of material in shaft kiln. One is that the material volume shrinks during the calcination process gives rise to movement of the material in the upper layer. Another reason is that the discharge of lower material causes the whole kiln material movement。
Lime shaft kiln produced by Henan Zhengzhou Mining Machinery Co., Ltd. has the advantages of energy saving, long service life, good sealing performance, wide fuel adaptability, covers an area of less, investment, etc. Welcome new and old customers to visit and purchase. We can answer all kinds of technical service for you！