Study on Talc Floatability in the System of Sulfide Minerals Flotation

文章通过浮选试验、接触角测量等研究了硫化矿浮选体系中滑石的可浮性.研究结果表明:滑石具有不受pH影响的天然可浮性,硫化矿浮选体系中戊基钾黄药(PAX)和金属离子不会影响滑石的可浮性;滑石层面接触角约为69°,端面接触角低于层面,约小10°,弱碱性条件下PAX和金属离子不会影响滑石的表面润湿性;弱碱性硫化矿浮选体系中滑石具有良好的可浮性.     

CMC在硫化矿浮选中的抑制作用及其抑制性能影响因素

抑制剂在浮选过程中对矿物的选择性分离起着重要作用.羧甲基纤维素(CMC)是一种高效无污染的选矿抑制剂,广泛应用于典型硫化矿的选择性浮选.尽管过去研究者对CMC在选矿中的应用进行了大量研究,但CMC在硫化矿浮选中的抑制作用及抑制效果的影响因素并未进行系统地总结.本文综述了CMC对方铅矿、黄铜矿、黄铁矿等硫化矿以及硫化矿浮选中含镁硅酸盐脉石矿物的抑制作用机理,总结了在硫化矿浮选中,CMC自身性质、矿浆p H、其他金属离子的存在、药剂用量、药剂添加顺序等因素对CMC抑制性能的影响,旨在为硫化矿高效浮选分离提供参考.     

硫化铜浮选及滑石高效抑制剂的研究

某氧化铜矿矿石氧化率73.5%,次生硫化铜(26.02%)主要以辉铜矿为主。矿石中滑石含量较高,对硫化铜的浮选产生不利影响。根据矿石性质,进行了硫化铜矿物浮选条件及滑石抑制剂SY作用机理的研究。其结果表明:采用捕收剂Z-200、滑石高效抑制剂SY进行浮选闭路试验,可获得铜品位60.72%、回收率23.55%的硫化铜精矿;抑制剂SY可有效降低捕收剂与滑石表面的作用,达到了抑制滑石的效果。     

不同种CMC对两种非极性矿物表面的抑制研究

由于滑石和辉钼矿具有相似可浮性,辉钼矿和滑石的浮选分离成为回收滑石型钼矿中钼的关键.文中研究了不同种羧甲基纤维素 （CMC）对于滑石和辉钼矿的不同抑制能力,探明了 CMC 的特性和不同生产原料对于其抑制滑石和辉钼矿能力的影响, 为选取更高效浮选分离滑石和辉钼矿的 CMC 做出了探索性研究.      

某铜铅混合精矿电位调控浮选分离试验的研究

硫化矿物经磨浮作业后,以矿浆的形式进入到浮选体系中,该体系中的各种组分多达上百种,是一个极为复杂的动态氧化还原体系。矿浆中的各种矿物在不同的电位条件下所表现出来的可浮性有较大的差异,通过一定的电位调控手段可以控制体系中的电位,使之保持在适宜分选某一种或者多种矿物的区间,从而加强不同的硫化矿物分选效果。通过向体系中加入化学试剂的手段来控制体系中的矿浆电位,对四川某铜铅混合精矿进行了单一电位调控浮选分离和电位调控＋抑制剂辅助浮选分离对比试验,获得了不同的试验指标,证明了在该浮选体系下,电位调控技术可在一定程度上强化分选效果,为复杂多金属硫化矿分选研究提供了一个可能的方向。     

硫化铜矿石诱导浮选新工艺的设计和研究

硫化铜矿物及其常见伴生金属硫化矿——黄铁矿,在特定的矿浆电位(Eh)条件下,具有不同机理的可浮性。研究表明,在不同的矿浆电位下,两种矿物的诱导浮选性能有明显差别,黄铜矿有良好的自诱导浮选性。而黄铁矿则有良好的硫诱导浮选性。据此,结合不同类型铜矿石,可以设计相应的工艺方案。对人工混合矿石及天然矿石验证试验证实,不同类型硫化铜矿石均可有效实现无扑收剂浮选和低量扑收剂浮选。新工艺较常规工艺具有明显的优点,应是提高硫化铜矿石浮选工艺水平和经济效益的途径。     

《湖南冶金》1990年总目次

题目作者期页题目作者期死 采矿湘潭锰矿黑色页岩自燃机理研究孔令双等14钢、木支架在复杂地层掘进中的应用刘保云1巧湖南砂岩型铜矿床的成因及找矿方向宋宏邦1 34管套支柱稳定承压的改良谢龙水译259硫化矿石氧化自燃时间的研究宋学义等37断层破矿线方程的推导与应用黄德仁59选矿硫化铅锌一萤石型矿选厂浮选起饱剂应用 探讨朱一民1 38从炼铜炉渣中浮选金属周永益译262宁化富铺中忆离子吸附型矿稀士矿可 选性试验研究池汝安等313氧化矿浮选的改善与强化陈泉源624矿物浮选与化学元素周期表(皿) 一常见硫化矿的可浮性及用药朱一民6 28 黑色金属…     

典型脉石矿物表面CN-吸附规律及润湿性研究

以石英、长石和方解石3种典型脉石矿物为吸附剂，NaCN为吸附质，考察了吸附时间和吸附剂添加量对CN^-吸附效果的影响。同时，采用固着液滴接触角检测法分析了脉石矿物表面吸附CN^-前后的润湿性差异，对吸附结果进行吸附动力学模型拟合。结果表明：石英、长石和方解石对CN^-表现出不同程度的吸附性和选择性。通过动力学研究发现：石英和长石对CN^-的吸附以物理吸附为主，CN^-与方解石之间存在键合吸附作用。通过检测接触角发现：CN^-的吸附导致脉石矿物表面亲水性增强，其中以石英表面接触角的降低最为明显。经过SBX浮选药剂作用后，脉石矿物表面接触角有所增加，但仍呈现亲水性质。说明氰化作用不会造成氰化渣浮选回收硫化矿时非目标矿物的跟浮，为实现氰化渣中矿物高效分离浮选提供了理论指导。     

伟晶岩型锂辉石矿浮选研究综述

基于对伟晶岩型锂辉石矿资源现状,锂辉石矿中主要组成矿物的理化性质与可浮性,锂辉石矿浮选基础研究和工艺现状的分析和总结,指出了伟晶岩型锂辉石矿浮选过程中的主要影响因素及所面临的主要问题。主要影响因素包括:磨矿细度、矿泥及易浮杂质、水质影响、搅拌强度、温度影响和合理用药;所面临的主要问题表现在:锂辉石矿中主要矿物浮选行为的研究有待加强、浮选捕收剂的捕收性和浮选分离抑制剂的选择性有待进一步提高、矿泥的浮选行为及其对锂辉石浮选行为的影响以及矿泥高效处置技术的研究有待加强、高海拔地区锂辉石矿浮选行为及其影响因素有待加强研究。提出锂辉石矿浮选应着重对锂辉石浮选动力学、锂辉石浮选药剂构效关系、泥质矿物浮选行为及对锂辉石浮选行为影响等方面的研究。     

730系列起泡剂的开发及应用研究

介绍了730新起泡剂的合成及浮选应用结果.研究表明,①新起泡剂具有良好的性能,且毒性比2#油低;②新起泡剂在锡石-多金属硫化矿的浮选中,有利于铜锡的分离,可提高铜锡的回收率③在某硫化铜矿的回收中,可略提高铜的回收率和品位,并节约起泡剂20%以上;④在某铅锌硫化矿的浮选中,可提高铅锌分离的选择性,并提高铅回收率2.01%,锌回收率1.05%;⑤在某含金黄铁矿的浮选中,新起泡剂提高金的品位和回收率分别为4.84%和5.71%,同时起泡剂的用量降低36%.     

Recycling Process Water in Complex Sulfide Ore Flotation: Effect of Calcium and Sulfate on Sulfide Minerals Recovery

The influence of major components of calcium and sulfate ions in process water on xanthate collector adsorption and flotation response of pure chalcopyrite, galena, and sphalerite minerals was investigated by Hallimond tube flotation, zeta-potential, FTIR, and XPS spectroscopy studies, while bench scale flotation tests were also carried out using complex sulfide ores.

Marginally lower recoveries of chalcopyrite and galena in process water and in the presence of calcium and sulfate ions in both deionized and process waters using potassium amyl xanthate as collector were observed in Hallimond tube flotation, whereas sphalerite floatability is a little increased in process water using isobutyl xanthate as collector. Zeta-potential results show the adsorption of calcium ions on the minerals. FTIR and XPS studies revealed the presence of surface oxidized sulfoxy species and surface calcium carbonates and/or calcium sulfate on chalcopyrite and galena in the presence of process water and water-containing calcium ions at flotation pH 10.5, and these surface species influenced xanthate adsorption. Surface-oxidized sulfoxy and carbonate species were seen on sphalerite surface in the presence of deionized water, process water, and water-containing calcium and sulfate ions at pH 11.5, but the surface species does not influence xanthate adsorption. Bench scale flotation using two different complex sulfide ores showed that chalcopyrite, galena, and sphalerite recoveries are higher in process water than tap water and general decrease of the minerals floatability at temperatures lower than 22°C in either tap water or process water.     

金属离子对矿物浮选行为影响的研究进展

在矿物浮选过程中,由于矿物的粉碎溶解、药剂的添加、回水的循环利用等原因,矿浆中难免会存在一些金属离子,这些金属离子往往会对矿物的浮选行为产生重要影响.在对相关文献分析和总结的基础上,概述了金属离子对氧化物矿物、硫化物矿物、硅酸盐矿物浮选和分离的影响.金属离子在不同pH条件下会形成络合物或沉淀,通过消耗捕收剂,抑制捕收剂分解来抑制矿物浮选,矿浆中离子浓度增大到一定程度也会抑制矿物浮选,单种离子不同组分或不同离子组合对浮选效果有较大影响.      

Effect of H2O2 and NaSH Addition to Change the Electrochemical Potential in Flotation of Chalcopyrite and Pyrite Minerals

The floatability of sulfide minerals can be affected by the redox conditions on particle surface and in the pulp and can be used as one of the parameters for the separation of sulfide minerals. In the present study, the presence of reducing and oxidizing agents in the pulp is investigated for pure samples of chalcopyrite and pyrite. A good correlation between pulp potential and recovery of chalcopyrite and pyrite was found when the potential was varied by addition of H₂O₂ and NaSH as oxidizing and reducing agents, respectively. In general, flotation is possible in the mildly to moderately oxidizing region and in slight or absent in reducing solutions for sulfide minerals.     

Flotation of diaspore and aluminosilicate minerals applying novel carboxyl hydroxamic acids as collector

Three novel carboxyl hydroxamic acids including ortho-carboxyl tetrachlorobenzohydroxamic acid (OCB), ortho-carboxyl hexahydrobenzohydroxamic acid (OHB) and ortho-carboxyl tetrahydrobenzohydroxamic acid (OTB), were synthesized and tested as collectors for flotation of diaspore, kaolinite and illite contained in diasporic bauxite from China. Subsequently, their flotation mechanism to diaspore and aluminosilicate minerals was investigated by zeta potential measurements and FT-IR spectrum checking. The results of flotation experiments show that by using carboxyl hydroxamic acid as collectors, the pulp pH value has significant influence on their collecting performance as the floatability of either diaspore or aluminosilicates varies sharply with their change, and the appropriate pH value for the flotation of diaspore gets close to neutral condition where diaspore presents good floatability while kaolinite and illite exhibits poor performances. Additionally, the floatability of diaspore and aluminosilicates is in the descending order of diaspore, kaolinite, and illite in the presence of three collectors, and their collecting capacity to three minerals is in the ascending order of OTB, OHB and OCB. Of three synthesized carboxyl hydroxamic acids, OCB has the strongest collecting capability to diaspore while relatively weak to aluminoscilicate minerals, whose good selectivity for the flotation between diaspore and aluminosilicates is possibly suited for direct flotation desilication of diasporic bauxite. Moreover, the optimum pH value for diaspore flotation associated with FT-IR spectrum and zeta potentials indicate that the adsorption interaction between the synthesized collectors and diaspore is dominantly a kind of chemical bonding one in the form of three cycle chelate rings due to the coordination of carboxyl and hydroxamate to the metal aluminum atoms, where the oxygen atoms contained in carboxyl and hydroxamate of the polar group have the stereo conditions to form five to seven membered rings. By contrast, the adsorption interactions of the carboxyl hydroxamic acid on the surfaces of aluminosilicate minerals are mainly dominated by means of hydrogen bonds.     

The Depressing Effect of Clay Minerals on the Floatability of Chalcopyrite

In this work, the depressing effect of clay minerals on the floatability of chalcopyrite using PAX as collector was assessed through induction time and settling-turbidity measurements. The data obtained using these two techniques were correlated with the results of micro-flotation tests carried out to study the effect of kaolinite and smectite particles on the floatability of chalcopyrite at pH 9 and 10. The results indicate that these techniques can be confidently used to examine interactions between clay minerals and chalcopyrite, and their possible consequences on the flotation process. In particular, the use of settling-turbidity measurements to evaluate slime coating seems to be a useful technique that could be applied to study heterocoagulation in other mineral systems. It was found that the depressing effect of clay minerals was stronger at pH 10, which was correlated to a possible effect of Ca²⁺ from lime on the process of coagulation between clay minerals and chalcopyrite. Coating of bubbles with clays was detected in this work by visual observations and it is proposed as a mechanism that might explain the depressing effect of clays on the floatability of chalcopyrite. Further research is needed to propose a mechanism that explains this phenomenon.     

Investigation on the Phase Transformation and Floatability of Sulphidized Cervantite

The surface physicochemical properties of cervantite are similar to the gangue minerals, so it is difficult to achieve the flotation separation of cervantite from them. In order to improve the floatability of cervantite, the phase and floatability changes of cervantite were investigated by the sulphidization roasting with element sulfur in reducing atmosphere and flotation tests. Cervantite did not float while using isoamyl xanthate as collector. But its floatability improved greatly by the sulphidization roasting with element sulfur, and a sulfide layer of Sb₂S₃ is found to be the key component which causes the hydrophobic of sulphidized cervantite. The flotation recovery of sulphidized cervantite increased from 5% to 95% while the molar ratio of S:Sb changed from 0 to 1.5. In other words, the floatability of the sulphidized cervantite increased with the increase of sulfide layer thickness. However, the sulfide layer thickness depended on the additive amount of element sulfur, roasting time and temperature. In the process of sulphidization roasting,element sulfur changed first from solid state to liquid state, then the liquid sulfur reacted with the surface of cervantite, and the stibium phase experienced the following change of Sb₂O₄→Sb₂O₃(O)/Sb₂O₃(C)→Sb₂S₃. In addition, the Sb₂S₃ phase will further react with Sb₂O₄ if there is lack of element sulfur in the sulphidization roasting system.     

某难选氧硫混合型铜矿浮选试验研究

针对某难选氧硫混合型铜矿的特点,利用铜矿物之间可浮性的差异,采用“先硫后氧,先浮选易选氧化铜矿,再浮选难选氧化铜矿”的异步浮选的流程,对含铜3.99%的原矿,在条件优化试验的基础上,开展闭路试验,可以获得浮选硫化铜精矿含铜50.66%,铜回收率25.17%,氧化铜精矿含铜19.68%,回收率54.05%,浮选综合铜精矿回收率达到79.23%。     

甘肃某难选金铜氧化矿浮选试验研究

甘肃某难选金铜氧化矿金含量为4.83 g/t,铜含量为1.18％,铜氧化率高达95.87％.铜矿物以难选的硅孔雀石为主,且与脉石矿物关系密切,金与铜矿物呈伴生关系.对原矿工艺矿物学进行了系统的研究,分析了尾矿中铜、金损失的原因.在磨矿细度为-74 μm占80％,Na2S作硫化剂,CuSO4作活化剂,丁基黄药、羟肟酸和2...