我想知道专业的硫精砂提取过程,硫铁矿经过球磨机和一定晒下就能选出40%以上的硫精砂吗?需要药剂辅助不
推荐回答(2个)
采用浮选方法最合理。
中国古代曾利用矿物表面的天然疏水性来净化朱砂、滑石等矿质药物,使矿物细粉飘浮于水面,而无用的废石颗粒沉下去。在淘洗砂金时,用羽毛蘸油粘捕亲油疏水的金、银细粒,当时称为鹅毛刮金。明宋应星《天工开物》记载,金银作坊回收废弃器皿上和尘土中的金、银粉末时“滴清油数点,伴落聚底"。这就是浮选法选金的最初应用。
18世纪人们已知道固体粒子粘附在气泡上能升至水面的现象.随着人们对金属需求量的增加,急于找到一种方法回收矿石中细粒金属。19世纪末,随着人们对矿物表面性质的认识深化,出现了薄膜浮选法和全油浮选法。20世纪初,泡沫浮选法应用选别有色金属和黄金矿.
今天所应用的泡沫浮选起源于几乎一个世纪以前的澳大利亚。1911年在美国蒙大拿州的Basin建立了第一座浮选厂-Timber Butte选厂。到1980年,239座浮选厂共消耗了77·2万t浮选药剂和65·6亿kWh的能量,处理了4·4亿t矿石。1980年,消耗了38·3万t浮选药剂,从2·05亿t的铜矿石中生42万精矿。处理量第二大的矿石是磷酸盐矿石———1·09亿t,消耗了22·7万t药剂,生产出2660万t磷精矿。铁矿石的生产主要也采用浮选法,从3890万t的矿石中生产出2150万t的铁精矿,消耗掉6·1万t浮选药剂。由于世界范围内几乎有20亿t矿石是经过浮选处理的,因此泡沫浮选显然是表面化学在工艺中最重要的应用之一,尤其是用于控制液-固界面。成功的浮选分离取决于在液体介质中固体颗粒与气泡间的相互反应。通过添加适宜的浮选药剂和pH调整剂来改进水分子与矿物表面间的相互反应的方法是实现从大量的复杂矿石(我们的矿物资源)中选择性地分离有用矿物的关键。泡沫浮选法并不是起源于理论研究,而是本世纪的经验积累的结果。若不是所有的理论研究,至少也是大多数理论研究用来解释现有工艺的良好性能。大多数选矿和冶金基础研究带有事后检查研究性质,或者如弗莱明和凯彻内尔精辟的描述,它是一门“追踪科学”。
浮选法的发生和发展也促进了黄金选矿业的发展,特别是对脉金矿的利用和在有色金属矿石中综合回收黄金创造了条件.目前,浮选法已成为处理金矿石生产黄金的重要工艺。我国许多脉金矿山选矿厂是以浮选工艺为主或以单一浮选工艺装备起来的。浮选厂的金回收率达到90%以上且可综合回收以金为主的低品位多金属。
小于10um细颗粒金是很难用重选法回收的.浮选利用矿物表面物理化学性质的差异可以选收细粒,甚至微细粒矿物。超细粒浮选或荷载体浮选和离子浮选可以回收微细粒金。
硫铁矿我只有稍微接触过。使用反浮选,必须要捕收剂,二号油,黄药,硫酸铜等
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