Mechanism of ring formation in grate-rotary kiln and its optimization practice in Beijing Shougang Co.,Ltd.
Aiming at the ring formation problem of pellet grate-rotary kiln in Shougang Co.,Ltd.,the performance characteristics,morphology and phase composition of pellets in each production process were studied and analyzed.As discovered by the results,inadequate dry pellets oxidation at grate head,pulverized coal combustion,high volatile pulverized coal particles aggregation and deposition,improper use of pulverized coal injection,and the amount of pul-verized coal injection at the kiln head position are important reasons that affect the ring formation of rotary kiln.In order to solve the problem of ring formation in rotary kiln,the optimization scheme of full roll grinding process of mineral powder was implemented.By adjusting the parameters such as air volume and air temperature of grate,the reasonable matc-hing of thermal system was realized.The measures such as controlling the temperature of rotary kiln,optimizing the burner and pulverized coal control could effectively improve the ring formation degree of rotary kiln,improve pro-duction efficiency and stabilize pellet quality.The study can provide reference for other pellet production lines.
rotary kilnring formationperformance characteristicsthermal system of grate machinepellet quali-tymineral phase structure
NETL
NSTL
万方数据
