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The cement rotary kiln produced by Henan Hongxing Machinery Co., Ltd. has simple and solid structure, stable operation, convenient and reliable control of the production process, fewer quick-wear parts, high quality of final products and high running rate. Energy conservation of rotary kiln is an effective way to improve the economic benefit of cement enterprise, which has great significance to cement plant. This paper mainly discusses the energy-conservation and thermal efficiency improvement of Hongxing cement kiln.1. Choosing reasonable control indexes. The thiner of pulverized coal , the greater of the surface area, the faster of burning speed and the smaller of incomplete combustion loss. The height of coal ash content has great influence of calorific value and combustion rate. For high coal ash content, we should use less primary wind and appropriate to lower pulverized coal fineness to speed up the combustion, reduce incomplete combustion, and meanwhile, it can improve the thermal strength of calcining zone, enhance production, increase efficiency.2. Reasonable excess air coefficient. Choosing reasonable exhaust and a certain amount of excess air of rotary cement kiln are the first condition of complete combustion. The rational use of primary wind, strengthen the management and improvement of the coal injection system. Should try to reduce the primary air ratio, increase secondary air.3. Reduce the heat loss in the clinker cooling process, which can increase secondary air temperature, speed up the fuel combustion, reduce incomplete combustion loss and increase fuel calorific capacity. Therefore, we should strengthen the seal of the kiln head and cooling machine to prevent the cold wind short circuit.4. Decreasing kiln ash escaping. It mainly depends on stove wind speed, raw grain heavy materials and type of heat exchange equipment. And wind speed has realtion with working temperature, excess air systems, heat consumption and production.5. Improve the efficiency of electric dust collector, reduce kiln ash discharged into the atmosphere cause environment pollution. Should avoid electric dust collector gets on and off, thus get the economic and social benefits.6. Rotary kiln dissipates heat through barrel. Building fire-proof bricks in the stove can reduce the heat dissipation of rotary kiln. And at the same time, we can brush refractory coating to reduce radiation.Welcome to visit Hongxing Machinery Co., Ltd.: sales@hxjq.com.horizontal lime kiln: http://www.ball-mill-china.com/news/kiln_dryer.html