Taking fume gas waste heat recovery based power generation engineering of the two 600t·d-1 lime rotary kilns for example，the ORC power generation technology for fume gas waste heat of the lime kiln is designed and developed，and the design of power generation system for organic working medium in kiln tail fume gas and its economic benefit are introduced and analyzed.This technology not only contributes to energy saving and pollutants reducing，but also brings economic benefit and social benefit.

Low porosity mullite bricks are prepared by mullite homogenized matericals，andalusite and α-alumina powder as main raw materials，adding with different proportions mullite homogenized matericals.It is found that this brick has the characters of low porosity，high cold crushing strength and good thermal shock resistance.Slag resistance of the low porosity mullite birck is studied by static crucible method compared with common high alumina brick and corundum-mullite brick，it is found that this brick has better slag resistance and apply to transition zone of laterite nickel ore rotary kiln.

The quality fluctuation of 3# Maerz kiln is analyzed.The problems such as gas valve blockage,gas ring pipe blockage,low calorific value of the gas,water leakage on gas booster is sovled,and finally the quality stability of Maerz kiln is improved.

This paper simply introduces the current status of the coke ovens，diagnosis and repair technology，coke oven refractories and suitable materials in coke dry quenching（CDQ）in Japan，and describes their property and application in detail.

The particle size of silicon powder has important effect on the performance of silicon nitride bonded silicon carbide.With the same silica total amount,the effects of the ratios of silicon powder with particle sizes of 400 mesh and 200 mesh on Si3N4-SiC physical performance,silicon nitride content and silicon nitride morphology of the fracture are studied in this paper.The results show that the samples  with the ratio of 1∶1 has the best comprehensive properties.

Energy saving lime shaft kiln has been widely used with poor production condition.The old control system is modified by the advanced and mature PLC automation control technology.The modified new system runs steadily,it meets the requirements of production process,reaches the goals of cost decreasing,gains considerable economic benefit for the company.