The process of calcining with oxygen enriched air has been widely used in some fields of metallurgical and chemical industries.

Contraposing to the disadvantages of several disposing processes of waste dry battery at home and abroad,this paper puts forword a new process to dispose of waste dry batteries with vacuum chloridizing roasting.

The asbestos slag are dealed with such processes as chloridizing roasting, digestion, light magnesium carbonate and white carbon can be prepared by carbonization and precipitation method separately.

Ga extraction from vanadium-leaching slag by chloridizing roasting is simulated using SMT; with combination of the traditional orthogonal design, regression analysis and nonlinear program,a new optimization experiment design has been made to obtain the optimum technological conditions with the minimum number of experiments.

The phase transformation and weight loss rate of ludwigite in oxidizing roasting were studied by DTA-TG,isothermal TG and XRD.

The arsenolite cinders were treated by the processes of oxidizing roasting-pyrolusite pulp absorption,magnetizing roasting-magnetic separation and acid leaching.

Germanium is recovered from gerichened vacuumn furnace slag of Shaoguan smelter using the flowsheet of ball milling neural leaching oxidizing roasting chloridizing distillation hydrolysis.