Primary stage: bentonite “one roughing, two cleanings, three scavengings” results.

Primary stage: bentonite “one roughing, two cleanings, three scavengings” results.粗选阶段：膨润土（bentonite）‘一次粗选（one roughing）、两次精选（two cleanings）、三次扫选（three scavengings）’流程的试验结果。