Investigation of Reduction Rate of Iron Ores Zeng Xiaoning(Wuhan University of Science&Technology in Metallurgy)The rate of reduction reaction is redefined in this paper.From the data of weight-loss experiment,the rate of reaction and the variation of this rate with time can be calculated.The controlled step of reducing process can be determined also.KEY WORDS rate of reaction;;controlled step reducibility[cf.1996,8(4):1]