不同入炉煤粒度分布宽度系数与焦炭强度的研究

摘要

试将粉碎后的炼焦煤料作为一个颗粒群，运用颗粒学的理论来分析炼焦入炉煤的粒度分布特征。根据颗粒学家T.Allen对分布宽度系数nk 的定义，设计试验方案采集基础数据；再应用计算机知识，处理基础数据，得到有关nk 的具体参数，并依据定义公式，计算得到几组炼焦入炉煤的粒度分布宽度系数nk。通过70kg小焦炉试验，研究了入炉煤粒度分布宽度系数对焦炭强度的影响，得到焦炭抗碎强度M40与入炉煤粒度分布宽度系数nk 的一元二次方程。这为研究入炉煤的粒度分布特征探索出一条行之有效的方法。%Coking coal after crushed was regarded as particles group, and characteristics of coal parti-cle size distribution were analyzed by the particle theory.According to the definition of distribution width coefficient nk by T.Allen, test scheme was designed and basic data were collected.Then basic data were processed through computer, the concrete parameters related to nk were obtained.On the ba-sis of definition formula, several groups distribution width coefficients nk were calculated.Influence of particle size distribution width coefficient of coal charged on coke strength was studied through the 70kg coke oven test.The effect of coal particle size distribution width coefficient on coke strength, an equa-tion of coke crushing strength M40 and particle size distribution width coefficient nk of coal charged were got, which provide an effective method for the study of characteristics of coal particle size distribution.