Based on the thermal measurements and the characteristics of equipment,process and operation,heat utilization status of the chain grate of Shougang Mining Company grate-kiln system is analyzed and diagnosed.

In the process of pellet production with grate-kiln way, the quality values of finished pellet are closely related to the control and adjusting for grate-kiln system's pyrology institution.

The simulating grate-kiln testing apparatus of tech center MA Steel has higher automation level and nicety simulating process.

Aimed at the problems that refractory material in grate-rotary kiln and pellet cooler were marred,the reasons causing the refractory mar were analyzeds and the methods and measures to lengthen the lifetime of refractory material in grate-rotary kiln was proposed.

In grate-rotary kiln\'s tests,after preheated at 900 ℃ for 6 min and fired at 1220 ℃ for 10 min,the pellets can take good physical strength and good chemical composition.

By analyzing three pelletizing processes and present situation of pellets industry, proper roasting technics-grate kiln should be popularized.

The test production aspect of 200Mt/a grate-kiln oxidized pellet production line in HANGANG, and the process characteristics and chief equipments were presented in this paper.

On the basis of summarizing the pelletizing process characteristics of the grate-kiln system,mass and thermal balance measurement of the grate-kiln system on the SHOUGANG MINING Co.