Flotation separation of arsenopyrite from several sulphide minerals with organic depressants

In this paper, the separation of arsenopyrite from chalcopyrite, pyrite, galena with organic depressants （guergum and sodium humic ） was discussed, and the functioning mechanism of those organic depressants was discussed. The experimental results of monomineral flotation indicated that both guergum and sodium humic have depressing effect on arsenopyrite in the presence of ethyl xanthate. Guergum and sodium humic showed different depressing ability to pyrite, chalcopyrite and galena, and the higher the pH value in pulp, the stronger the depressing ability. Ultraviolet-Visible Spectrophotometric study showed that the adsorption layer of xanthate on surface of minerals had been desorhed by the two organic depressants, and the selective desorption of the collector layer was found from different minerals. The xanthate cover on minerals surface was set free when dosage of the organic depressants was high enough. For artificially-mixed minerals, the separation of arsenopyrite from other sulphides was successfully realized by controlling dosage of the organic depressants. And sodium humic had been concentrates in a commercial Lead-Zinc concentrator.

某铋锌铁多金属矿石选矿试验

为了给某铋锌铁多金属矿石的合理开发利用提供依据,针对矿石性质特点,选择SN-9#作为铋矿物的选择性捕收剂,采用铋锌依次浮选—弱磁选工艺流程进行选矿试验,并在浮铋粗选时添加组合抑制剂Na2SO3+ZnSO4,在浮铋精选和浮锌精选时分别添加新型环保高效抑制剂CK-1#和CK-2#,获得了铋品位为17.96%、铋回收率为68.08%的铋精矿,锌品位为48.03%、锌回收率为88.61%的锌精矿和铁品位为66.11%、铁回收率为66.15%的铁精矿,有效实现了铋、锌、铁的综合回收。此外,铋精矿和锌精矿中还分别富集了823.57 g/t的银和301 g/t的铟。

煤泥浮选体系微生物影响研究进展

原煤中有大量土著微生物,进入浮选体系中与生产用水中的微生物随着水循环富集或死亡,其群落结构变化会对浮选效果产生影响。本文综述了微生物浮选、矿山生物治理以及矿物加工过程中微生物群落演变等方面的研究现状,阐明微生物在煤浮选中的重要影响,寻找现有研究中的共性与差异、空白与瓶颈,对未来做出展望。得出以下结论:①近几十年来对微生物浮选的长足研究可以很好地证实微生物会调控矿物及矸石的表面性质;②矿物也会影响着微生物的生长状况,随着微生物的富集或死亡,抑或是分泌物质的改变,都会影响煤浮选效果;③矿山废水的生物治理结果表明,微生物与浮选药剂之间的作用也不能忽视,一方面部分药剂可以为微生物提供碳源,另一方面微生物在药剂胁迫条件下,其生长和分泌特性都会发生改变;④对矿物加工过程中微生物群落演变的研究有助于筛选有利菌种,同时明晰不同条件下的优势种及其生长情况,对指导浮选过程具有重要意义。