云南保山矽卡岩型铜铅锌共生矿选矿中间试验

在选矿中间试验条件下,对云南保山地区矽卡岩型铜铅锌共生矿进行了浮选试验研究,取得了较好的选矿指标。中间试验选矿指标为:铜精矿铜品位18.57%,回收率78.04%;铅精矿铅品位67.37%,铅回收率58.26%;锌品位49.11%,锌回收率88.57%。为开发该矿提供了选矿技术依据。     

某含银铟铅锌多金属硫化矿选矿工艺研究

根据某地含银铟铅锌多金属硫化矿的工艺矿物学特性,进行了试验研究。矿石中主要金属矿物为闪锌矿、方铅矿、黄铁矿,伴生有银、铟、镓、金等矿物,嵌布关系较为复杂。通过探索试验,确定了磨矿细度、抑制剂和捕收剂种类,通过正交、调优、验证试验确定了选矿药剂用量,最终采用"磨矿-浮选-重选"的选矿工艺流程。最终小型闭路试验获得了含铅56.69%、铅回收率90.64%、镓回收率46.70%、银回收率62.95%的铅精矿,含锌40.16%、锌回收率90.72%、铟回收率87.18%的锌精矿和含硫38.70%,硫回收率73.15%、金回收率80.40%的硫精矿。在回收铅锌硫的同时,使矿石中伴生稀贵金属镓、银、铟、金也得到较好的回收,实现了资源综合利用。     

新疆某银矿选矿试验研究

针对该赋存于氧化矿中的自然银矿石,采用浮选方法进行回收。闭路试验采用-0.074 mm 60%的磨矿细度,以异戊基黄药为捕收剂。通过一粗三精四扫的工艺流程,成功获得了品位为5427 g/t,回收率81.91%的银精矿。该流程药剂种类少,便于简单,且满足了现场选矿指标的要求,为该资源的综合利用提供了参考依据。     

白钨矿与含钙脉石常温浮选分离药剂研究进展

白钨矿与含钙脉石矿物的浮选分离是选矿的难点之一。利用溶液化学的知识揭示出,矿物表面的转化使含钙矿物的化学组成、表面电性及可浮性发生变化,是导致白钨矿与萤石、方解石浮选分离困难的主要原因;总结了白钨矿浮选的常规捕收剂与抑制剂,重点介绍了白钨矿与含钙脉石矿物常温浮选分离的新型高效捕收剂和抑制剂的种类、性能及作用机理,并阐述了组合捕收剂、组合抑制剂在白钨浮选实践中的优势;指明了高效捕收剂、抑制剂今后研究的方向。     

内蒙某钽铌尾矿回收锂云母工艺研究

内蒙某钽铌尾矿含有大量的锂云母矿物,尾矿中的脉石矿物主要为长石、石英类硅酸盐矿物,矿石中的细泥(含原生细泥和磨矿产生的次生细泥)矿物制约锂云母浮选精矿品质的提高。对含Li2O 1.02%的钽铌尾矿,采用尾矿脱泥-锂云母浮选(一次粗选、一次选扫)的工艺流程,锂云母浮选采用碳酸钠作调整剂,椰油胺+MC-2作组合捕收剂,获得锂精矿含Li2O 5.02%,达到优质锂盐级标准;锂精矿对钽铌尾矿回收率为74.82%,有效实现了尾矿中锂资源的综合回收利用。     

大型浮选机、磁选机的制造管理

选矿装备作为资源综合利用的关键设备近几年得到迅速发展。在技术参数、选矿指标方面有了明显的进步和提高,呈现出大型化、专业化、自动化、智能化的特点。伴随着加工制造机床的加工精度和智能化程度提升,选矿装备的制造精度和一致性方面也有了质的飞跃。如何实现选矿装备在加工制造中的质量提高,备品备件的一致性和互换性的经济适用,是当前矿山设备,特别是选矿设备制造厂家面临的急需解决的课题。本文主要就选矿装备中的磁选机和浮选机的现状和制造加工的质量提升及成本降低提出作者的建议。     

某低品位铅锌硫化矿浮选试验研究

某硫化铅锌矿含铅锌原矿品位低、嵌布粒度细、伴生关系复杂。通过多种方案的比较,采用优先浮选抑锌浮铅的选别流程,试验采用乙硫氮作为优先选铅的捕收剂,石灰作为调整剂以及黄铁矿的抑制剂,硫酸锌和亚硫酸钠作为闪锌矿的抑制剂,之后利用硫酸铜作为闪锌矿的活化剂,用丁基黄药作为捕收剂来实现铅与锌的有效分离。试验获得铅精矿含铅51.00%、铅回收率86.63%、含银518 g/t、银回收率47.41%,锌精矿含锌51.20%、锌回收率85.27%、含银234 g/t、银回收率38.38%。     

Hydrophobic Flocculation Flotation for Beneficiating Fine Coal and Minerals

ABSTRACT

It is shown that hydrophobic flocculation flotation (HFF) is an effective process to treat finely ground ores and slimes so as to concentrate coal and mineral values at a fine size range. The process is based on first dispersing the fine particles suspension, followed by flocculation of fine mineral values or coal in the form of hydrophobic surfaces either induced by specifically adsorbed surfactants or from nature at the conditioning of the slurry with the shear field of sufficient magnitude. The flocculation is intensified by the addition of a small amount of nonpolar oil. Finely ground coals, ilmenite slimes, and gold finely disseminated in a slag have been treated by this process. Results are presented indicating that cleaned coal with low ash and sulfur remaining and high Btu recovery can be obtained, and the refractory ores of ilmenite slimes and fine gold-bearing slag can be reasonably concentrated, leading to better beneficiation results than other separation techniques. In addition, the main operating parameters affecting the HFF process are discussed.     

The effect of acrylamide-co-vinylpyrrolidinone copolymer on the depression of talc in mixed nickel mineral flotation

Copolymers of acrylamide and vinylpyrrolidinone with varying compositions have been synthesised and employed to depress talc in a model flotation system with process plant operation conditions. Adsorption isotherms indicated that the hydrophilic acrylamide homopolymer has a very low affinity for the hydrophobic talc surface, whereas vinylpyrrolidinone homopolymer strongly adsorbs onto the talc surface. Micro-flotation experiments revealed that the copolymer system can induce stronger talc depression than the homopolymer variants, with the most effective copolymer depressant having 25-30% vinylpyrrolidinone incorporation. The copolymer system is observed to have inherited the strong talc affinity of vinylpyrrolidinone polymer and the strong hydrophilic property from polyacrylamide. This combined effect facilitates the desired strong talc depression in single mineral flotation. However, this copolymer system has similar adsorption affinity on both the talc and pentlandite, hence depressing both talc and pentlandite in the mixed mineral flotation system. This research shows that a sufficient hydrophobic balance on the polymer is necessary for the adsorption and subsequent depression for talc. However, polymer with high adsorption selectivity is required to be a successful synthetic talc depressant for mixed mineral system.     

黄铜矿和铁闪锌矿自诱导和外控电位浮选研究

研究了黄铜矿、铁闪锌矿自诱导和外控电位浮选的基本行为。结果表明，黄铜矿在较宽的pH范围内均可实现自诱导浮选，并且通过外控电位可以控制它的浮选行为；铁闪锌矿在酸性条件下可实现自诱导浮选，通过外控电位也可以控制它的浮选行为；碱性条件下铁闪锌矿不能实现自诱导浮选，通过外控电位也难以改变它的浮选行为。通过测量循环伏安曲线，分析了两种矿物表面氧化形成的产物，元素硫是主要的疏水体。