我们厂是一个有三十多年历史的老厂,以前只处理三宝矿一井的原煤,洗出十二级精煤,供炼焦用。1965年,当原煤灰分为27.15%时,洗矸中的绝对损失占原煤的0.21%,精煤回收率达71.52%。无产阶级文化大革命以来,入洗原煤发生了变化,我厂不仅洗选三宝矿一井 Our factory is an old factory with more than 30 years of history. Previously, it only dealt with the raw coal of the well in Sambo Mine and washed out 12 types of clean coal for use in coking. In 1965, when the raw coal ash was 27.15%, the absolute loss in the waste rock was 0.21% of the raw coal, and the recovery rate of the clean coal reached 71.52%. Since the Great Proletarian Cultural Revolution, coal washing has undergone changes, I plant not only washed a well Sambo