云南某高磷鲕状赤铁矿提铁降磷试验研究

云南某鲕状赤铁矿磷含量高达0.87%,铁品位为45.14%。对此矿石进行单一的强磁选及反浮选试验研究,结果表明都不能获得磷品位低于0.2%,铁品位较高的铁精矿。采用强磁-反浮选及脱泥-反浮选均能获得磷品位低于0.2%,铁品位高于52%的铁精矿。脱泥-反浮选具有投资成本低,流程结构简单的优势,推荐采用此流程处理该矿石。该研究对开发此类高磷鲕状赤铁矿具有一定的借鉴意义。     

江西某铁矿回收铁的试验研究

对于磁铁矿和赤铁矿混合型石英脉铁矿,磁浮工艺是成熟的.针对该矿嵌布粒度细,品位低的特点,利用粗精矿磨矿提高磁铁矿精矿品位和浮选入选品位,在原矿铁品位22％情况下,试验获得弱磁铁精矿品位大于65％,反浮选铁精矿品位大于58％,综合铁回收率大于50％.     

某贫赤铁矿选矿试验研究

本试验矿石属鞍山式贫赤铁矿,且含硫较高。分别采用正浮选、重选、弱磁-强磁-反浮选的试验方案进行了回收赤铁矿的试验研究,弱磁-强磁-反浮选工艺取得了较好的试验效果,获得了铁品位67.81%、含硫0.019%、回收率65.68%的铁精矿。     

某贫赤铁矿选矿试验研究

介绍了某贫赤铁矿选矿试验研究，阐述了采用两段磨矿－两段磁选（弱磁、ＳＬｏｎ型强磁）－浮选的选矿流程。试验结果表明：该流程是适宜的；ＳＬｏｎ型立环脉动高梯度磁选机对难选细粒贫赤铁矿物分选效率较高，浮选流程药剂制度简单，选别效果较好。     

酒钢镜铁矿尾矿中铁矿物再回收试验研究

酒钢选矿厂排出的镜铁矿强磁选尾矿铁品位约为28%,有较高的回收价值。为回收其中的铁矿物,本研究基于该强磁选尾矿工艺矿物学,对其进行反浮选—磁化焙烧—磁选试验研究。研究结果表明：该强磁尾矿经过一粗一精的反浮选试验流程,可得到铁品位为43.88%的浮选精矿,其作业铁回收率为50.93%。经过磁化焙烧后得到焙砂,焙砂进行一粗一精的磁选试验后可得到铁品位为62.37%的磁选铁精矿,其作业铁回收率为83.39%。     

某微细粒难选铁矿选矿试验研究

某铁矿为微细粒弱磁性铁矿,有用矿物主要是赤铁矿和磁铁矿,脉石矿物主要是石英．在磨矿中产生许多矿泥,影响其可浮性．采用重选、磁选、浮选、选择性絮凝和磁化焙烧等工艺处理该矿石．结果表明,采用选择性絮凝脱除矿泥,阳离子反浮选工艺最合适．在原矿含铁45．27％的情况下,获得铁品位59．67％,回收率78．84％的铁精矿．     

回收德兴铜矿大山尾矿中铁的试验研究

工艺矿物学研究表明,德兴铜矿大山选矿厂浮选尾矿中的铁矿物有硅酸铁、赤铁矿、褐铁矿、硫化铁、磁铁矿、铁屑及磁黄铁矿,其中磁铁矿、铁屑及磁黄铁矿具有磁性,可通过磁选回收,小型磁选试验结果表明,通过一次粗选-粗精矿再磨-两次精选工艺流程,在粗选磁场强度4500Oe,再磨细度-37μm占40%,精一磁场强度1500Oe,精二磁场强度1200Oe,从选铜尾矿中获得了铁品位60.18%,回收率1.00%的铁精矿。     

难选赤铁矿浮选试验研究

研究了以FQ为捕收剂,采用正浮选流程浮选赤铁矿。考察了磨矿细度、药剂种类和用量对浮选指标的影响。闭路试验采用1粗4精2扫、中矿顺序返回流程,最终获得铁品位59.43%铁精矿,铁回收率72.74%。     

高磷鲕状赤铁矿焙烧-磁选-反浮选试验研究

鄂西高磷鲡状赤铁矿复杂、难选。研究表明,采用还原磁化焙烧-弱磁选-阴离子反浮选流程是最现实的选别方案,可得产率56．20％、品位TFe61．88％、回收率79．95％的铁精矿,为开发同类或类似复杂难选铁矿提供参考、借鉴作用。     

某贫赤铁矿选矿试验研究

介绍了某贫赤铁矿选矿试验研究,阐述了采用两段磨了一两段磁选（弱磁SLon型强磁）-浮选的选矿流程。试验结果证明:该流程是适宜的;SLon型立环脉动高梯旺磁选机对准选细粒贫赤铁矿物分选效率较高;浮选流程药剂制度简单,选别效果较好。      

从铜阳极泥中回收砷的技术研究

主要研究了铜阳极泥在碱性环境下氢氧化钠浓度、液固比、温度、反应时间对砷浸出率的影响,并得到了较优工艺条件。最佳浸出条件为：液固比6∶1,氢氧化钠浓度60g/L,反应温度85℃,反应时间4h。在以上条件下,砷浸出率可达到98.81%。     

高铋银阳极泥综合回收工艺研究

进行高铋银阳极泥综合回收工艺研究试验,高铋银阳极泥经过两段浸出、水解法分离锑铋、两段置换,实现了铜、铋、银的分离并分别进行回收。     

高磷鲕状赤铁矿铁磷分离试验研究

对高磷鲕状赤铁矿进行了显微结构研究,采用添加脱磷剂直接还原焙烧-磁选工艺进行了铁和磷分离试验,研究了焙烧温度、内配碳量、添加剂配比对铁、磷分离主要技术指标的影响。结果表明:磷主要以磷灰石的形态嵌布在鲕状结构中,部分与赤铁矿形成环状间层,层间的厚度变化范围在3~15μm之间;在焙烧温度1 000℃、内配碳量6%、添加剂配比10%的优化工艺条件下,通过球磨-磁选试验可得到含铁品位大于85%、含磷量在0.15%~0.20%之间的优质还原铁粉和含磷为3.5%~4%的富磷渣。     

真空蒸馏法从铜阳极泥中回收硒的研究

采用真空蒸馏技术,研究了从铜阳极泥中回收硒技术参数和过程机理。分析了硒在熔体中扩散、熔体表面蒸发、气体空间扩散和冷凝器上析出过程机理。通过实验得到了真空蒸馏提纯硒的最佳条件:在温度为330℃和压力为10 Pa的条件下,蒸馏30 m in,硒的纯度达到99.9%。     

Composite Micropelletization of Slime for Iron Grade and Recovery Maximization to Generate Pellet Feed Materials

The present research work deals with the upgradation of iron ore slime by maximizing its iron grade and recovery so that it can be used in downstream iron making processes. Slime contains significant amount of iron value and is still being dumped as waste which also requires large area for dumping. Slime (45–48 wt% Fetotal) after converting into dry powder was mixed with desired amount of reductant (NCC), and the mixture was converted into composite micropellets (+ 1 to − 6 mm) by using disc pelletizer. Produced composite micropellets were subjected to reduction at desired reduction conditions. Temperature, NCC dosage and time were the prime parameters whose effect on iron grade and recovery was investigated. Wet magnetic separation tests were performed on reduced samples to upgrade the iron content. Maximum value of iron grade and recovery was achieved at 900 °C with 11% of NCC for 60 min. After magnetic separation, iron content and recovery in the magnetic concentrate were 57.27% and 60%, respectively. This route of reduction for steel plant generated slime may be a helping hand in the usage of slime to prepare magnetic concentrate-based pellet feed materials.     

某厂铜阳极泥中铜的回收试验研究

本文针对某厂铜阳极泥中铜含量高、难溶的特点,经过二次焙烧二次浸出,铜浸出率达９９％以上,硫酸铜结晶率〉９０％,海绵铜置换率〉９９％,铜总回收率〉９９％,该方法具有经济和环境双重效益。     

Phosphorus Removal and Iron Recovery from High-Phosphorus Hematite Using Direct Reduction Followed by Melting Separation

To efficiently utilize high-phosphorus oolitic hematite resources, a method using direct reduction followed by melting separation was proposed. In this study, direct reduction behavior of the ore–char briquette and the melting separation behavior of the reduced briquette were investigated. Direct reduction test results show that under investigated conditions, the briquette reached a metallization rate of 80%–88% and a residual carbon value of 0.11–4.85 wt%,and apatite layers were fragmented into tiny particles, some of which were embedded in metallic iron phase. Melting separation test results show that residual carbon can significantly influence the iron recovery rate. For metallic briquettes with the abovementioned qualities, the iron recovery rate ranged from 75% to 98%. To control the phosphorus content in molten iron to be nearly 0.4 wt%, an iron recovery rate of 80% was shown to be adequate.     

某钨选厂细泥综合回收试验研究

介绍了某钨选厂的矿石性质,细泥生产工艺及现状,该选厂钨细泥现采用摇床一次粗选一次扫选的工艺对钨进行回收,在钨品位为0.16%的情况下,获得WO3品位为13.00%的摇床精矿,钨的回收率仅为48.00%,细泥精矿中伴生有价元素Mo、Cu、Pb、Zn回收率分别为15.00%、28.00%、38.34%、27.00%。经实验室试验研究,采用硫化矿浮选-离心选矿机重选的联合工艺流程,可获得WO3品位为17.63%的细泥精矿,钨回收率提高到66.60%,且对其伴生有价金属Mo、Cu、Pb、Zn可分别提高53.00%、32.80%、1.66%、43.35%的回收率。