从锌浸出渣中浮选回收银

针对目前湿法炼锌残渣中的银一直不能很好地回收利用这个问题，本文研究了Ｎａ２Ｓ、ｐＨ、捕收剂及起泡剂的种类和用量对Ａｇ＋沉淀浮选的影响，并在此基础上，改进从锌浸出渣中浮选银的药方，用Ｎａ２Ｓ作调整剂，丁基黄药和辅助捕收剂ＸＹ混合作捕收剂，ＲＢ为起泡剂，成功地回收了锌浸出渣中的银，结果表明，采用改进的药方，可从含银４９８．１０ｇ／ｔ的锌浸出渣中得到含银４３６９．７３ｇ／ｔ，回收率为７９．４４％的银精矿，为从锌浸出渣中回收银提供了依据和新药剂制度，用于指导生产实践，具有十分重要的经济价值．     

起泡剂对硫化矿无捕收剂浮选的影响

起泡剂作用在无捕收剂浮选过程中较有捕收剂浮选过程更为显著。本文考查了起泡剂用量和种类对硫化铜矿石和钼铋硫化矿石无捕收剂浮选回收率以及精矿品位的影响。起泡剂用量增加导致精矿回收率明显增加。松醇油和丁基醚醇是硫化矿无捕收剂浮选的适宜起泡剂。探讨了起泡剂的作用方式。     

药剂优化对焦煤煤泥浮选影响的研究

利用两因素三水平正交试验对浮选系统中捕收剂和起泡剂的用量以及配比进行优化研究,并通过精煤产率和浮选完善指标分别对浮选效果进行评价,结果表明:这两个评价指标所对应的最佳药剂条件并不一致,且捕收剂对浮选效果影响大;利用探索试验对捕收剂做进一步的优化,试验表明在捕收剂用量为900 g/t,起泡剂用量为100 g/t时浮选精煤产率最大,节能减排效果最佳.     

AO捕收剂浮选稀缺难浮煤实验

针对稀缺难浮煤浮选回收率偏低的情况,研制一种AO浮选捕收剂。通过浮选实验和润湿热实验,比较AO捕收剂、煤油、柴油对稀缺难浮煤的浮选效果、浮选速度及三种药剂与难浮煤泥作用的润湿热。结果显示:AO捕收剂浮选稀缺难浮煤的最佳操作指标为,捕收剂与起泡剂质量配比3∶1、捕收剂与起泡剂总用量1.28 kg/t、矿浆浓度75 g/L;在精煤灰分大致相同的情况下,AO捕收剂的浮选精煤产率比煤油、柴油分别提高了11.33%和14.94%,浮选完善指标分别提高了6.18%和8.09%;AO捕收剂的浮选速度最快,与煤样作用的润湿热最大。验证性浮选实验结果进一步证明AO捕收剂是一种理想的难浮煤用浮选药剂,具有实际应用价值。     

分离回收废旧锂离子电池电极材料的浮选实验研究

采用柴油作捕收剂、甲基异丁基甲醇(MIBC)作起泡剂对锂离子电池电极材料进行浮选实验研究,考察捕收剂用量、起泡剂用量、分散剂和抑制剂种类及用量对正极材料钴酸锂回收率的影响。研究结果表明:当矿浆质量浓度为0.05 g/mL,pH为6.0时,以0.15 mg柴油为捕收剂,0.75 mg六偏磷酸钠为分散剂,0.75 mg聚丙烯酸钠作抑制剂,0.84 mg MIBC为起泡剂,正极材料钴酸锂的回收率达93%。     

钛铁矿海滨砂矿尾矿的浮选试验研究

对广西北海地区的钛铁矿砂矿尾矿进行了系统浮选试验研究,钛铁矿砂矿尾矿由原矿经过重选和磁选得到.研究表明,Pb(NO_3)_2对钛铁矿有活化作用,主要是由于Pb2+与钛铁矿发生特性吸附,提高了油酸钠对钛铁矿的捕收能力.以硫酸和水玻璃作为调整剂,Pb(NO_3)_2作为活化剂,油酸钠作为捕收剂进行浮选,在硫酸用量900 g/t,水玻璃用量400 g/t,Pb(NO_3)_2用量30 g/t,油酸钠用量450 g/t的药剂制度条件下,经过一次粗选、两次精选的闭路浮选流程,可得到TiO_2品位为39.55%,回收率为54.61%的钛精矿.     

浮选柱精选细鳞片中碳石墨实验

依据鳞片石墨浮选特点,设计石墨浮选柱实验装置。以细鳞片中碳石墨为研究对象,通过正交实验考察循环压力、矿浆浓度、柱体高度、捕收剂用量四个主要影响因素,分析因素的显著性;通过单因素实验确定实验因素对浮选效果的影响程度。结果表明：在循环压力为0．04MPa、矿浆质量浓度为40g／L、柱体高度为1550mm、捕收剂用量为200g／t条件下,石墨精矿的品位最高,为94．190％;矿浆浓度对精矿品位的影响最为显著,循环压力对精矿产率的影响最为显著;石墨精矿品位随着矿浆浓度、循环压力和捕收剂用量的增加而减小,随着柱体高度的增加而增大。该研究为浮选柱分选石墨的实际应用提供了技术参考。     

中关铁矿钴回收试验研究

通过试验研究,确定对磁选尾矿中Co金属作为副产物回收的可能性,并确定合适的浮选工艺,在不影响原有磁选工艺的前提下,加入适当的调节剂CaO、起泡剂2#油、捕收剂丁基黄药,浮选钴精矿品味即达到0.341%,回收率71.06%,经济效果显著。     

一种用于酸性条件下胶磷矿反浮选脱硅的新型阳离子捕收剂

针对目前胶磷矿反浮选脱硅阳离子捕收剂的选择性差、仅适用于弱碱性矿浆条件、消泡难等问题,本研究采用主要成分为十六烷基三甲基溴化铵（CTAB）和邻苯二甲酸二丁酯（DBP）的两种化工厂副产品研发了一种新型、经济、高效的胶磷矿反浮选脱硅阳离子捕收剂。在微浮选试验中,当pH值为6–10,新型捕收剂用量为25 mg·L?1时,石英和氟磷灰石纯矿物之间存在显著的可浮性差异。在pH值为6,新型捕收剂用量为0.4 kg·t?1时,对脱镁磷精矿进行粗选脱硅浮选试验,获得了P₂O₅品位为29.33wt%、SiO₂品位为12.66wt%、P₂O₅回收率为79.69wt%的胶磷矿精矿指标。利用FTIR、Zeta电位和接触角测量进行机理研究,研究结果表明新型捕收剂对石英的吸附能力高于氟磷灰石,同时DBP的协同效应也增强了石英和氟磷灰石之间疏水性的差异。泡沫稳定性试验结果表明,新型阳离子捕收剂的最大消泡率可达142.8 mL·min?1,其消泡速率远高于其他常见传统阳离子捕收剂。     

起泡剂W-02起泡性能的研究

本文介绍起泡剂W-02的两相泡沫性质及表面张力,用W-02代替2号油浮选铜录山氧化铜矿,小型开路试验结果表明其效果与2号油相当。在桃林铅锌矿用W-02浮锌连续30个工班业试验,与2号油对比结果,在其它药剂用量相同时,W-02用量为15.65g/t,得锌精矿品位51.16％,作业回收率94.13％,而2号油量则为42.72g/t,得锌精矿品位50.15％,作业回收率94.19％。     

金银铜多金属黄铁矿烧渣综合回收试验研究

根据黄铁矿烧渣的物理、化学性质特征,完成了多金属综合回收试验.结果表明:烧渣组成以氧化铁为主,并含有贵金属及有色金属,部分金、银、铜包裹于黄铁矿等硫化物中,而锌主要以铁酸锌形式存在.对烧渣进行氰化浸出,在试样未磨情况下,采用石灰调节矿浆pH=10～11、矿浆浓度35%、浸出时间24 h、氰化钠耗量6 kg.t-1的试验条件,可以获得金、银浸出率分别为67.25%、60.08%;采用浮选法处理烧渣可获得金品位8.66 g.t-1、回收率为37.82%的浮选产品,其中银品位和回收率分别为100.3 g.t-1、20.26%;对浮选尾矿直接进行氰化浸出,可获得金、银浸出率分别为96.85%、70.08%.     

多金属氧化钼矿工艺矿物学及其综合利用技术研究

对氧化钼矿的工艺矿物学特征及其综合利用技术进行研究.结果表明:氧化钼矿的主要矿物组成为钼华、钼钙矿、褐铁矿、黄铁矿及石英.在磨矿细度为200目以下含量65%时,采用混合浮选工艺,可得钼品位为7.41%的钼精矿,钼回收率为82.18%,其中含铅18.02%、含金7.96 g.t-1、含银1 002 g.t-1;采用联合碱浸法处理钼精矿,可获得钼浸出率为95.61%的工艺指标;采用氰化法处理碱浸渣,金银浸出率分别为94.55%、83.96%;采用浮选法处理氰化渣,可得铅品位为46.76%的铅精矿,铅回收率为52.83%;采用重选法回收浮选尾矿中的石英,可获得SiO2含量为97.12%、回收率为80.84%的石英产品.     

Comprehensive recovery of gold and base-metal sulfide minerals from a low-grade refractory ore

The comprehensive recovery of small amounts of valuable minerals such as gold and base-metal sulfide minerals from a low-grade refractory ore was investigated. The following treatment strategy was applied to a sample of this ore: gold flotation–gold concentrate leaching–lead and zinc flotation from the gold concentrate leaching residue. Closed-circuit trials of gold flotation yielded a gold concentrate that assayed at 40.23 g·t-1 Au with a recovery of 86.25%. The gold concentrate leaching rate was 98.76%. Two variants of lead-zinc flotation from the residue—preferential flotation of lead and zinc and bulk flotation of lead and zinc—were tested using the middling processing method. Foam from the reflotation was returned to the lead rougher flotation or lead–zinc bulk flotation, whereas middlings from reflotation were discarded. Sulfur concentrate was a byproduct. The combined strategy of flotation, leaching, and flotation is recommended for the treatment of this kind of ore.     

硫化锌精矿加压酸浸渣回收工艺及其环境影响分析

以硫化锌精矿加压酸浸渣为研究对象,系统的分析了加压酸浸渣浮选回收硫精矿,浮选尾矿经两段浸出、氧化除铁、锌粉置换和蒸发浓缩等工序回收七水硫酸锌的工艺过程,并分析了该过程产生的废气、废水、废渣和噪声等对周围环境的影响。     

海南某金矿尼尔森重选-浮选试验

以海南某石英脉型金矿石为原料,进行尼尔森重选-浮选试验研究.通过GRG试验得出金矿中重选可回收金质量分数为80.88%.通过条件试验确定了该矿石尼尔森重选-浮选的最佳条件为:磨矿细度-74μm占80%,相对离心力60g,反冲水压16kPa,矿浆质量分数40%,戊基黄药用量200g/t,浮选时间5 min.原矿石品位9.8g/t,利用尼尔森选矿机一次分选可得品位230g/t,金回收率80.30%的重选精矿.重选尾矿品位2.0g/t,经过一次粗选一次精选三次扫选处理,可得浮选精矿品位57.3g/t,浮选金作业回收率75.66%.经尼尔森重选-浮选流程处理后,尾矿金品位降至0.5g/t,全流程金总回收率95.21%.     

Semi-industrial experimental study on bauxite separation using a cell–column integration process

The cyclonic-static micro-bubble flotation column (FCSMC) is a highly efficient mineral processing equipment. In this study, a cell-column (FCSMC) integration process was investigated for the separation of bauxite and its feasibility was analyzed on a theoretical basis. The properties of low-grade bauxite ore from Henan Province, China were analyzed. Parameters such as reagent dosage, scraping bubble time, and pressure of the circulating pump during the sorting process were investigated and optimized to improve the flotation efficiency. On the basis of these parameters, continuous separation experiments were conducted. Bauxite concentrate with an aluminum-to-silicon (A/S) mass ratio of 6.37 and a 77.63wt% recovery rate were achieved via a flow sheet consisting of “fast flotation using a flotation cell, one roughing flotation and one cleaning flotation using flotation columns”. Compared with the full-flotation-cells process, the cell–column integration process resulted in an increase of the A/S ratio by 0.41 and the recovery rate by 17.58wt%. Cell–column integration separation technology represents a new approach for the separation of middle-to-low-grade bauxite ore.     

Study on the accelerant to the sodium oleate during bauxite flotation

The conventional collector for diasporemineral is oleic acid(OLA),which is highly insoluble and must be used in high dosage in bauxite flotation.Firstly flotation experiments with every reagent(sodium oleate,tween-20)were carried out and it was shown that sodium oleate was an effective diaspore collector,whereas nonionic surfactant tween-20 showed little collectivity.Then experiments were carried out with sodium oleate as the main collector with the addition of tween-20 to study the influences of potentiator on diaspore flotation.It could be seen from the experiments that potentiator had a marked influence on the recovery of diaspore,which was raised by more than 12% and that addition sequence also affected the flotation behavior.It gave the best results with the reagents mixed thoroughly before added and the best ratio of collector oleic acid and potentiator tween-20 stood at 10:1.From the calculation of the ingredients in the sodium oleate solution,at the pH 9,sodium oleate acted with surface of themineral with the acid-soap polymer [HOL·OL-].Zeta potential test showed that the potentiator promoted the absorption of collector on themineral surface,which lowered zeta potential.As could be seen from surface tension experiments,the addition of potentiator tween-20 lowered the CMC(critical micelle concentration) value of oleic acid solution,which was equivalent to raise the power of the agents.By the adsorptive capability tests,with the addition of tween-20,the adsorption of oleic acid on diaspore got more.