Applied JT5-2 model saw tooth wave duplex jig to replace JT3-1 model single-chamber jig and spiral chutes which handle sand return from the double-spiral classifier,and achieved good index.

• 提出采用JT5-2型双室锯齿波跳汰机代替JT3-1型单室跳汰机,以及用来选别双螺旋分级机返砂的螺旋溜槽,取得了理想的指标。