选煤厂生产过程中的杂物(铁器、木块)一般都是在原煤准备阶段除去的。铁器是利用在预先筛分前的运输皮带头部设磁性除铁装置;木块通常是设检查性手选皮带,用人工手选的办法检出,但实际上拣除的都是块度比较大的,细碎的木块等杂物不能通过人工手选来完成,否则劳动强度太大。西山 In the coal preparation plant during the production of debris (iron, wood) are generally removed in the coal preparation stage. Iron is the use of pre-screened conveyor belt head set magnetic iron removal device; wooden block is usually set to check the hand-selected belt, hand-selected way to detect, but in fact are sorted out block size comparison Large, broken pieces of wood and other debris can not be done by hand, otherwise the labor intensity is too large. Western Hills