SEPARATION OF WOLLASTONITE FROM CALCITE AND QUARTZ-A STUDY ON COMPREHENSIVE UTILIZATION OF-LOW-GRADE WOLLASTONITE FROM DADINGSHAN

摘要

Wollastonite in Jilin province is very plentiful and occupies the first place in China in reserves. The Dadingshan wollastonite nine developed for many years is largest in China and one of twelve nonmetal resources bases owned by China Nonnetal Industry Corp. At present, the traditional hand-sorting method has been adopted for picking out the rich orestone. About ten thousand tons of low-grade orestone is discarded as tailings, resulting in much waste. The lesearch purpose is to solve some problems on conpiehensive utilization of the hand-sorting low-grade wollastonite tailings.The major associated minerals of hand-sorting wollastonite tailings are calcite and quartz. The key to mineral processing is removal of calcite and quartz. The flotation is only effective because the wotlastonite, calcite and quartz all are nonmagnetic minerals and similar in specific gravity. Petrolatum soap oxidized is a collector for calolle and W-50 prepared by ourselves is used as collector for quartz. We first romove calcite, and then wollastonite is separated from quartz by flotallor technique with desilication. We have two products of wollastonite concentrate and two by-product; of calcite and quartz. The closed circuit test figures, wollastonite concentrate(I) contains wollastonite of 90.95% recovery is 46.16%; grade of wollastonite concentrate(II) is 83.07%,and recovery, 41.22%,generat recovery of wollastonite is 87.38%. Grade of calcite concentrate (by product) is 94.81% and recovery, 97.20%; grade of quartz concentrate is 72.80% and recovery, 79.40%. Through preliminary estimates, the economic benefit of mineral processing is tangible.