How to Purchase a Suitable Rotary Kiln?

More and more countries now choose Rotary Kiln as the equipment of producing pellet used in blast-furnace iron-making. Put the powdery material like finely-ground ores, fine grinding concentrate or converter dust to the Rotary Kiln after they are twisted to ball by the pelletizer and reheated by the grate, and then roast them under the temperature of 1250~1350 centigrade degree. With strong adaptability to the material, good pelletizing performance, easy temperature control, reliable equipment, and simple operation, the kiln develops rapidly. Now the kiln abroad is 7.6 in diameter and with capacity of 4 million ton per year.The lime rotary kiln has dual-pressure system. The small blower blows secondary air into the cooling zone to cool line evenly. This makes the part under the calcining zone keep positive pressure. Dual-pressure system controls the quantity of primary air and secondary air more precisely than all negative pressure system. Waste air of the rotary kiln top is extracted by the run-off regulator device to keep negative in the zones above the calcining zone and make heat temperature even on the rotary kiln’s section. The regulating range of air quantity is 10%~100%. Regulating burning air quantity makes the lime rotary kiln working under the best operating condition, saves energy and cuts down production cost.The rotary kiln is usually turned by means of a single Girth Gear surrounding a cooler part of the kiln tube, but sometimes it is turned by driven rollers. The gear is connected through a gear train to a variable-speed electric motor. This must have high starting torque in order to start the rotary kiln with a large eccentric load. A 6 x 60 m rotary kiln requires around 800 kW to turn at 3 rpm. The speed of material flow through the rotary kiln is proportional to rotation speed, and so a variable speed drive is needed in order to control this.Henan Hongxing Mining Machinery Co., Ltd is a joint-stock mining machinery manufacturing enterprise...