用石英砂替代标准无烟煤测定粘结指数的研究

通过改变石英砂掺比后的粘结指数试验表明随着石英砂掺入比例的减少试验煤样的似粘结指数逐渐增加,以石英砂为添加物的混焦似粘结指数与混焦粘结指数二者的比值同配合比具有非常好的线性回归关系,在此回归方程的基础上,建立了混焦粘结指数同不同比例下以石英砂为添加物的混焦的似粘结指数之间的相关方程。补充试验表明以标准无烟煤为添加物的混焦似粘结指数随配合比先增加后减小,当配合比小到1:5以后时,混焦的似粘结指数几乎和不添加添加物的全混焦的似粘结指数相当。通过比较不同添加物不同配比下混焦似粘结指数得出同配合比下以标准无烟煤为添加物的混焦似粘结指数大于以石英砂为添加物的混焦似粘结指数,二者之间的差别随配合比增大而增大。非线性回归结果表明以标准无烟煤为添加物的混焦似粘结指数(G_(2a)′)与以石英砂为添加物的混焦似粘结指数(G_(2s)′)的比值与配合比具有非常好的拟合关系。 In order to seek a substitute of standard anthracite, do some research on the caking index of mixing coke which is mixed with quartz sand by the regulated ratio in standard(GB/T5447-1997), the results are so bad that need the new testing method. The testing results under different mixing ratio between quartz sand and mixing coke show that the coking index of mixing coke with quartz sand increases under the condition that the quantity of quartz sand in the mixture decreases, ant that G_2′/G and mixing proportion act as good linear regressive relationship. Based on the regressive equation, the corresponding equation between G_2′ and G is established. The further supplementary tests demonstrate that the coking index of mixing coke with standard anthracite firstly increases and subsequently reduces with the mixing proportion. When the mixing proportion is junior to 1:5, the coking index of mixing coke with standard anthracite is mostly equal to that of mixing coke. The comparison of approximate coking index of mixing coke with different supplements under different ratio indicate that the coking index of mixing coke with standard anthracite is senior to that of mixing coke with quartz sand and the gap enlarges with mixing proportion. A conclusion from nonlinear regression is drown that G_(2a)′/G_(2s)′ and mixing proportion have a excellent fitting relation