Investigations on the Collector Reagent Development for the Recovery of Cassiterite from the Gravity Tails of a Low Grade Indian Tin Ore

Abstract

Results of the experimental studies carried out for developing a flowsheet for the recovery of cassiterite from the gravity tails of a low grade lode type tin ore (Tosham, Haryana) from India by froth flotation using three different collector reagents — alkyl phosphonic acid, sodium sulfosuccinamate and alkyl phosphoric acid ester are presented. The studies include micro-flotation of high purity cassiterite from Tosham, bench scale studies on gravity tails of Tosham tin ore, large scale semi-continuous test with relatively better reagent at optimised flotation conditions ending up with development of conceptual flowsheet meant for obtaining fuming grade cassiterite concentrate. The performance of various collector reagents was analysed on the basis of conventional metallurgical accounting methods and flotation kinetic rate constants. From a feed containing 0.24% Sn, a float product analysing 7% Sn with 55% recovery was obtained using a reagent combination of alkyl phosphoric acid ester-sodium silicofluoride - commercial grade sulfuric acid and citric acid.     

微细粒锡石浮选药剂研究概况

综述了细粒锡石浮选所用捕收剂、抑制剂的种类、特点及应用现状,介绍了矿浆中金属阳离子对捕收剂性能的影响,指出了研发新型药剂和组合药剂的重要性,以期对国内外同行有所裨益.     

炭渣处理工艺流程的探讨及研究

重点介绍了处理炭渣的一种新工艺, 即H2SiF6 - H2SO4 炭渣隔膜电解法。该方法是针对我厂目前处理炭渣的工艺流程所存在的缺点, 经过多种试验方法的摸索、实践、研究后而提出的一种新方法。该法为进一步探讨炭渣处理的工艺流程开辟了一条新路。     

铌钽矿酸浸过程中表面微观结构表征

研究铌钽铁锰矿(Fe,Mn)(Nb,Ta)_2O_6在酸浸过程中界面结构及组成变化。探索复杂铌钽矿物元素选择性浸出机理,实现铌钽复合矿的高效资源化利用。通过金相显微镜结合XRD研究了铌、钽在矿中的赋存特性,分析了酸浸前、后的铌钽铁锰矿相变化。利用EDS对微区元素含量进行分析,获得矿物在酸浸前后表面宏观结构的变化以及表面元素含量的变化。XPS结合ICP检测结果分析酸浸前后铌钽矿物表面各元素化学价态及其化学键合状态的变化,确定了铌钽矿酸浸过程中各元素的选择性溶解。H_2SO_4酸浸时,矿物表面结构发生了Me—O转化为Me—SO_4的变化,结合不同Me元素的Me—O和Me—SO_4电子结合能大小以及ICP结果确定了不同化学状态元素在酸中溶解的由难到易的顺序为:Fe~(3+)—O→Fe~(2+)—O→Mn~(2+)—O→Ta~(5+)—O→Nb~(5+)—O。     

中钇富镧稀土物料处理流程的选择

将一摩尔物质穿过液—液界面所需的能量对各种金属来说大体上是一个常数。选择设计的流程做到了萃取过程在相间传递的物质摩尔数尽可能减少。对中钇（含Ｙ２Ｏ３２０～４０％）富镧（含Ｌａ２Ｏ３２０～４０％）稀土物料，采用环烷酸进行镧钇和其它稀土的切割分离，再用Ｐ＿（５０７）分离镧钇，其它稀土用Ｐ＿（５０７）分组，后续的单一稀土分离流程可以方便地衔接。不仅流程简捷，技术先进，经济上也最为节省。     

含氰废水处理方法的研究

针对采用湿法提纯金泥的企业处理含氰化物的废水,采用氯化法提纯金泥中的黄金,由于金泥含有大量氰化物,在预浸工序产生的废水中氰化物含量达到2 000 mg/L 左右。国家规定排放废水中含有的氰化物浓度不得超过0.5 mg/L,本企业要求排放废水中氰化物的浓度不得超过0.04 mg/L,预浸产生的废水必须经过脱氰化处理才能排放。经过实际研究,结合精炼厂现有工艺设备,采用酸性氯化法和活性炭吸附法相结合来脱出废水中的氰化物,经过处理的废水总氰含量低于0.04 mg/L,达到排放标准,最后排入焦家金矿选厂。     

采金船三段跳汰选金流程合理性分析与探讨

通过对采金船三段跳汰选金流程进行理论与实践上的分析与探讨及与其它流程的比较，认为该流程尽管是目前采金部常用几种选金流程中最先进的流程，但也存在许多不足．根据近年来出现的新设备及新技术，提出了改进该流程的措施．     

80t BOF-LF-VD-CC流程生产GCr15轴承钢控氧的工艺实践

分析了BOF终点[C]对终点[O]的影响,LF精炼渣（FeO+MnO）和[Als]对钢水[O]和钢材T[O]的影响。通过控制BOF终点[C]0.12%~0.15%,下渣量＜0.10%,LF精炼控制[Als]0.015%~0.025%,采用高碱度中间包覆盖剂和专用GCr15钢连铸保护渣等工艺措施,在稳定工艺控制的条件下,可使钢中T[O]≤10×10^-6,平均T[O]为6.62×10^-6。     

氟碳铈镧矿稀土萃取分离流程研究

根据以轻稀土为主的氯化稀土原料的组成特点 ,针对氟碳铈镧矿 ,应用串级萃取理论原理进行优化设计 ,得到氟碳铈镧矿分离稀土的优化工艺流程     

氟碳铈镧矿稀土萃取分离流程研究

根据以轻稀土为主的氯化稀土原料的组成特点，针对氟碳铈镧矿，应用串级萃取理论原理进行优化设计，得到氟碳铈镧矿分离稀土的优化工艺流程。     

50 t EAF-LF(VD)-CC流程冶炼轴承钢的氮含量控制

分析莱钢50 t EAF-LF(VD)-CC冶炼工艺各期GCr15轴承钢中氮含量的变化,得出电弧炉终点[N]为(23～36)×10-6,成品材N含量为(79～104)×10-6.为降低轴承钢中的N含量,采取电弧炉兑入铁水量≥35%、用低氮增碳剂、优化LF精炼操作、VD真空度≤67 Pa、长水口和氩气保护浇铸等措施,使GCr15轴承钢材的平均氮含量从91.6×10-6降至54.8×10-6.     

黑钨与锡石分离技术研究

介绍了笔者研究的三种黑钨与锡石混合粗精矿分离技术既干式强磁分离技术、湿式强磁分离技术、浮选分离技术.研究结果表明,采用三种黑钨与锡石分离技术均可获得较好的黑钨与锡石分离指标.     

Adsorption of Octyl Hydroxamic Acid/Salt on Cassiterite

Abstract

The interaction of octyl hydroxamic acid/salt with cassiterite has been studied using adsorption, electrokinetic and infrared spectroscopic techniques. Results indicate that the surfactant sorbs on the mineral surface by relatively weak forces, both specific and physical in nature. Adsorption was greater in the acidic pH region than in the alkaline pH, implying the involvement of hydroxamic acid molecule and hydroxylated cassiterite of the type-Sn(OH), in the sorption process. Electrokinetic and FTIR studies confirmed the involvement of specific forces of interaction in the sorption process. Based on the experimental observations, the possible modes of sorption are discussed.     

轴承钢精炼与浇铸技术发展概况

概述了瑞典、德国、法国、意大利、日本和俄罗斯轴承钢生产工艺流程和设备特点,重点介绍二次精炼和浇铸时对钢中氧含量和夹杂物的控制,讨论轴承钢精炼和连铸技术的发展趋势。     

Adsorption of Octyl Hydroxamic Acid/Salt on Cassiterite

The interaction of octyl hydroxamic acid/salt with cassiterite has been studied using adsorption, electrokinetic and infrared spectroscopic techniques. Results indicate that the surfactant sorbs on the mineral surface by relatively weak forces, both specific and physical in nature. Adsorption was greater in the acidic pH region than in the alkaline pH, implying the involvement of hydroxamic acid molecule and hydroxylated cassiterite of the type–Sn(OH), in the sorption process. Electrokinetic and FTIR studies confirmed the involvement of specific forces of interaction in the sorption process. Based on the experimental observations, the possible modes of sorption are discussed.     

硫一氧混合铅锌矿重-浮选联合流程试验研究

简介硫-氧混合铅锌矿选矿流程试验。试验研究表明，重-浮选联合方法是处理硫-氧混合铅锌矿的有效方法。该方法为类似的混合铅锌矿的选别提供了一条新思路。     

太钢60 t EAF-LF-VD-2.5 t铸锭流程冶炼低钛轴承GGrl5钢的实践

With the process measures including using low titanium hot metal, alloys and slagging materials, eccentric bottom tapping and alloying in tapping in EAF steelmaking, using Si-Al compound deoxidation and CaO-MgO-SiO₂ -Al₂O₃ slag series with basicity 3 ~5 in LF refining,30 Pa VD treatment and shielding casting,the analysis results of Φ150 mm forged bar are oxygen content in GCrl5 bearing steel being 4.5 X 10^-6 ~9 x 10^-6 ,Ti content 0.0010% ~0.0015% with minor 5 μm TiN inclusions to meet the quality requirement for super grade quality low titanium bearing steel.     

轴承钢线材的开发

轴承钢线材的市场需求量不断增大，同时在生产上存在很大的难度。高线厂对影响质量的孔型系统、料型制度、生产管理等方面进行了优化，实现了逐渐扩大南钢轴承钢线材市场影响力的目的。     

Treatment of Arsenic Bearing Raw Materials

Studies showed the possibility of arsenic removal from gold- and copper bearing ores and concentrates with high levels of arsenic (2-12%) under reducing-sulphidizing conditions, especially in the presence of pyrite. Pilot plant and industrial scale fluid bed reasting at 750-900°C showed that under reduction-sulphidizing conditions with pyrite and (or) coke the arsenic is eliminated as arsenic sulphide and greater than 99% arsenic can be eliminated from copper and gold concentrates containing 2-8% arsenic. With increasing temperature, duration of roasting, and pyrite addition, vaporization degree increases. The roasted calcine is suitable for pyrometallurgical or hydrometallurgical treatment.     

合金轴承运转温度过高的分析与处理

本文探讨了合金轴承运转温度过高的处理方法，分析了如此处理对于轴承内油压的影响和轴承温度降低的原因，提出了处理时应注意的事项．