Limestone preheater kiln flue gas is 1150 ° C is heated to 900 ° C or so, about 30% of the decomposition, the hydraulic plunger push the rotary kiln, rotary kiln sintered limestone decomposed into CaO and CO2. Generated after decomposition of limestone into the cooler, the cooler was bubbled into the cold air cooled to 100 ° C at the discharge. The hot-swappable 600 ° C hot air into the kiln and gas combustion. Exhaust fan in blended with cold air entering through the baghouse, and then the exhaust fan into the chimney. The qualified raw materials and fuel in proportion, with an accuracy of 3 ‰, said electronic accurate weighing, hopper and belt conveyor through the middle uniformly mixed by 1.5m3 bucket hoist along the bridge of a single mixture transported to the roof by the hopper, electromagnetic vibrating feeder evenly through the dosing by rotating distributor to complete the furnace roof fabric. Material flow by gravity to overcome the buoyancy of the gas and slow down the movement, have passed the preheating zone, calcining zone, cooling zone. Charge during descent, with the hot gas for a complex heat exchange, and accompanied by decomposition of limestone and lime development of the grain growth process, when the entire process is completed, the combustion air can be cooled down to 40-60 ℃ . Then the ash from the disc drive and two sealing valve does not leak combustion air in the case of lime to the furnace unloading belt conveyor. The upgraded machine, screening, will be ≤ 5mm and> 5mm lime were unloaded into separate bins. Combustion air from the blower from the furnace bottom blown into the furnace, to overcome the resistance of the pellets from the bottom up to the roof, in the dust, attracted by the induced draft fan, flue gas through the pipeline to dust to dust. As the role of the induced draft fan, so that the formation of micro kiln feed side surface of the negative pressure region (-10Pa or so). The slightly negative pressure to ensure the smooth flow furnace, is very conducive to the decomposition of limestone calcining zone, flue gas fan will be fully introduced filter purification, and then discharge from the chimney into the atmosphere. If the coal particle size unqualified, particle size is too small will be in the calcining zone CaCO3 decomposition calorie deficiency, likely to cause half-cooked. Such as particle size is too large, the cooling zone Shihai burning, resulting in ore discharge temperature is too high, that is a waste of fuel, but also makes the row of ore difficult. No qualified and stable raw material and fuel, it can not produce qualified products. So with a qualified fuel-based, coupled with advanced technology, we ensure that the products of high quality. Please indicate Henan YuFeng Heavy Machinery (http://www.yufchina.com)