萤石与重晶石浮选分离的研究

STUDY ON THE FLOTATION-SEPARATION OF FLUORITE-BARITE

采用改性水玻璃Ｈ１１０１混合剂浮选分离萤石与重晶石获得稳定的良好指标．经过捕收剂作用的萤石或重晶石泡沫，在１００ｍｇ／ＬＨ１１０１的条件下，９８％（质量分数）的重晶石在精选过程中被抑制，约８５％的萤石进入最终泡沫．用５００～１５００ｇ／ｔＨ１１０１和油酸浮选不同比例的萤石和重晶石混合矿（精选４～６次），９９％的重晶石留在槽内，萤石泡沫含ＣａＦ２＞９８．５％，回收率９８％～８０％．萤石－重晶石矿石浮选，适量的Ｈ１１０１可以获得常规药剂（Ｎａ２ＣＯ３＋Ｎａ２ＳｉＯ３）难以得到的优质萤石精矿，品位＞９８％，回收率＞８０％．特别是用Ｈ１１０１分离含重晶石６１％和萤石１５％的复合矿石，在产出合格萤石精矿的同时，使重晶石精矿符合标准（密度＞４．２），它们的回收率分别达到７２％和９４％，红外光谱及能谱分析结果与相应的浮选指标相吻合．

Stable and good results have been achieved for the flotation-separation of fluorite and barite by adopting modified water glass H1101 mixed reagent. Fluorite or barite foam is treated with collectors. In 100mg/L H1101, 98 mass % barite is depressed in the concentration process, while about 85% fluorite enters the final foam. 500-1 500g/t H1101 and oleic acid are adopted to float mixed ore of fluorite and barite at different ratios (concentrated for 4 - 6 times), 99% barite is remained in the sluice, the fluorite foam contains CaF2over98. 5%, the recovery is 98%- 80%. For the flotation of fluorite-barite ores, proper dosage of H1101 can result in high-grade fluorite concentrate (grade>98%,. recovery>80% )which is difficult for the conventional reagent (Na2CO3 +Na2SiO3) to achieve. Especially when H1101 is used to separate a composite ore containing 61 % barite and 15 % fluorite, quality fluorite concentrate is produced, up-to-the-standard barite concentrate (density>4.2) isgained at the same time, with the recovery of 72% and 94%, respectively. Analytical results by IRS and ES are well conformable to the corresponding flotation results.