赤铁矿的正-反浮选研究

赤铁矿的有效选别对钢铁工业的发展有重大的作用。正-反浮选对于处理贫、细、杂的赤铁矿有比较明显的优势。通过对人工混合矿的正-反浮选流程和对淀粉已吸附了捕收剂的赤铁矿单矿物的抑制机理的研究，进一步证实了正-反浮选工艺流程是可行的。通过试验结果可以发现正-反浮选流程处理弱磁性铁矿物有巨大的潜力。     

提高选钼技术经济指标的探讨

介绍了德兴铜矿提高铜钼混合精矿用品位的几项科研成果以及在生产中应用情况。采用充氮新工艺、充填式浮选柱新设备的试验结果表明不仅能提高铜钼分选指标而且可显著降低生产成本。     

捕收剂对铅锌硫化矿浮选的影响及在矿浆中的浓度分布

研究了捕收剂对铅锌分选的影响 ,应用紫外光分光光度法测定矿浆中捕收剂的浓度。通过单矿物浮选及实际矿石浮选试验 ,考察了捕收剂对黄铁矿、方铅矿和闪锌矿浮选的影响 ,试验表明 ,对方铅矿来说 ,乙硫氮具有较好的选择性 ,而黄药对这三种矿石都具有较好捕收能力 ,因此 ,在实际生产中往往采用混合用药。通过捕收剂用量试验发现捕收剂用量必须加以合理控制 ,用量太大 ,会影响产品的质量 ,用量太小又会影响回收率乃至生产成本 ,因此对矿浆中的捕收剂浓度加以检测是必要的也是有意义的。利用紫外光分光光度法对现场的捕收剂浓度进行了检测 ,结果表明 ,对于同一个作业 ,尾矿产品的矿浆浓度大于精矿产品 ;对于精选作业来讲 ,其相应产品的药剂浓度随着流程前进逐步降低 ,对于粗选作业来说 ,规律相反 ,浓度随着流程前进逐步升高。     

硬质高岭石与一水硬铝石的反浮选分离

针对中国铝土矿资源具体特点 ,本文作了一水硬铝石与主要脉石矿物一硬质高岭石反浮选的初步研究。复合型药剂YB - 1很大的改善了硬质高岭石的可浮性 ,而YX - 3呈现很好的选择性。在pH <6 0时 ,二者差距达 6 0 %以上 ,特别是一水硬铝石产率小于 1 0 %。配合使用分散剂YF - 2 ,对一水硬铝石 ;高岭石 2 :1的人工混合矿进行反浮选分离。经过一次粗选、一次精选 ,槽内产品实现回收率(Al2 O3 ) 77 5 9% ,铝硅比 1 0 74。     

生物药剂在矿物加工和冶金中的应用

综述了生物药剂在矿的加工和冶金中的研究现状及应用，指出了生物药剂的发展趋势及研究方向。     

Intensification of Polymetallic Sulfide Ore Dressing by High-Energy Electrons

It is established that accumulation of radiation defects and radiation-induced electric breakdown decrease the mechanical strength of ores and facilitate the fracture over the interface of different minerals. The preliminary processing by electron beam increases the quality of flotation concentrate.     

Process development for the separation of tetrahedrite from chalcopyrite in the Neves-Corvo ore of Somincor S.A., Portugal

In the Somincor Neves Corvo ore, antimony occurs in the tetrahedrite-tennantite series of minerals while copper occurs in chalcopyrite and in other minerals present in minor quantities including the tetrahedrite-tennantite series. Current processing strategies do not directly address the control of antimony contamination of the final copper concentrate. The focus of this paper is to report initial findings of a major investigation undertaken on both a plant and laboratory scale.It was found that both collector type and concentration significantly affected copper/antimony selectivity. In particular, staged addition of dithiophosphate collector was required to control tetrahedrite flotation during copper roughing. However, size by size analysis showed that tetrahedrite flotation increased during scavenging due to further collector addition which was required to recover coarser chalcopyrite bearing particles. The production of separate rougher and scavenger concentrates enriched in chalcopyrite and tetrahedrite respectively, became an attractive option.It was found that oxidative treatment was required to adequately control tetrahedrite flotation. This treatment was applied to a final, low volume concentrate stream containing large quantities of tetrahedrite.In order to further enhance selectivity, fundamental work is aimed at establishing the relative ease of oxidation of chalcopyrite and tetrahedrite as well as the influence of oxidation: on the stability of the adsorbed hydrophobic species. A fiowsheet embracing these various concepts is proposed.     

浮选柱研究现状及发展趋势

简要介绍了国内外浮选柱分选技术研究现状,分析了浮选柱分选技术的发展方向。     

氟硅酸铵在赤铁矿与含铁硅酸盐浮选分离中的选择性抑制作用

研究了油酸钠为捕收剂的赤铁矿浮选中，水玻璃与氟化物等抑制剂对含铁硅酸盐脉石矿物霓石（NaFe2SiO6）的浮选抑制行为。单矿物浮选试验结果表明，以氟硅酸铵对霓石的抑制效果最好，在pH=4～5的弱酸性条件下具有最佳的选择性。人工混合矿浮选分离试验结果表明，油酸钠（NaOL）与十二烷基磺酸钠（SDS）组合使用分选效果更佳。通过对矿物表面ξ电位与油酸钠吸附量的测定以及红外光谱分析，初步讨论了氟硅酸铵对霓石选择性抑制作用的机理。     

Collection zone kinetic model for industrial flotation columns

The collection zone recovery of a flotation column was modeled using a rectangular distribution function for the kinetic rate constant and a tank in series model with different vessel sizes for the residence time distribution. It was demonstrated that an analytical expression can be obtained and that data from large industrial columns fits well, keeping the parsimony principle by using a simple and practical solution. An example for the estimation of the maximum kinetic rate constant, useful for scale-up purposes, is shown using data from industrial flotation columns.