四川某高铁氧化铅锌矿选矿工艺研究

针对四川某高铁氧化铅锌矿进行了优先浮选、脱泥浮选、摇床重选和强磁选等选矿工艺的条件试验和全浮选工艺流程研究,通过试验得到了铅品位72.59%、铅回收率60.19%的硫化铅精矿;锌品位51.83%、锌回收率12.23%的硫化锌精矿;铅品位59.90%、铅回收率28.78%的氧化铅精矿;锌品位29.09%、锌回收率41.86%的氧化锌精矿。氧化铅浮选采用脱泥浮选可以较大幅度地降低硫化钠的用量,氧化锌矿物的选别采用摇床重选-强磁选联合流程,可以有效消除弱磁性铁矿物对氧化锌精矿品位的影响。各种铅锌矿物得到了有效回收。     

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％.     

Experimental Study of Dry Desliming Iron Ore Tailings by Air Classification

ABSTRACT

Techniques for dry processing low-grade iron ores and tailings are being investigated. Dry desliming tests using a rotating wheel air classifier and factorial design were performed on a difficult-to-treat low-grade high-goethite Australian iron ore tailings. The results were compared with theoretically ideal size separation and a hydrocyclone desliming study using the same tailings. The air classifier performance was poorer than the hydrocyclone due to agglomerated particles in the feed, including fines coating coarser particles. The “fish hook” effect was observed and discussed. After dry desliming, the silica and alumina contents of a selected product were 30% and 26% lower, respectively.     

重选-磁选-反浮选回收某铁尾矿中的铁、硫试验研究

研究了某尾矿的工艺矿物学性质及回收铁精矿、硫精矿的工艺流程。通过采用螺旋溜槽预富集-磨矿-弱磁选-强磁选-浮选硫-反浮选硅工艺回收铁精矿、硫精矿,获得的铁精矿TFe62．58％、回收率32．63％,硫精矿S品位37．57％。     

内蒙古某铁矿选矿工艺试验研究

内蒙古某铁矿是属磁铁矿和赤铁矿混合型低品位铁矿,根据该矿性质,采用一次弱磁,阶段磨矿,二次强磁,强磁精矿反浮选工艺流程。实验最终可获得品位65.02%、回收率20.74%的弱磁铁精矿和品位58.78%、回收率29.93%的反浮选铁精矿,综合铁精矿品位为61.18%,综合回收率达到50.67%。     

超纯铁精矿的工艺试验研究

用含TFe 63 .10 % ,SiO2 7.3 2 %的普通铁精矿 ,采用磨矿、磁选、反浮选的工艺 ,可获得含TFe 71.5 0 %、SiO2 0 .40 %、产率 3 9.13 %的超纯铁精矿 ,同时还可得出TFe 66.2 %的高品位普通铁精矿 ,TFe回收率达 98.80 %。     

赤褐铁矿磁化焙烧矿物组成和物相变化规律

磁化焙烧—磁选工艺是有效处理难选弱磁性氧化铁矿的最有效方法之一,所得到的铁精矿性质与天然磁铁矿性质具有较大的差别。反浮选结果表明,人工磁铁矿和天然磁铁矿在浮选性能方面具有较大的差异,采用XRD(X-ray diffraction)、显微镜测试技术观察磁化焙烧矿物组成和物相变化,原矿中硅以碎屑石英和硅质泥岩形式存在,焙烧后有部分硅质泥岩,还有部分石英是被铁矿包裹,分布较原矿分散,即磁化焙烧形成的磁铁矿有一定的包裹、充填和浸染现象,具有不完整的晶体结构,分布分散,矿石内部组织结构的不均匀程度增加。原矿有用矿物主要以Fe2O3形式存在,脉石矿物主要是石英;焙烧后铁矿物的赋存由Fe2O3转变成Fe3O4为主,并掺杂Fe2O3,FeO,Fe,矿物组成发生变化,矿物不均匀性增强。焙烧物中还出现高铁橄榄石和铁硅酸盐峰,一部分橄榄石和硅酸盐矿物进入反浮选精矿,造成铁损失。     

Characterization and Processing of Iron Ore Slimes for Recovery of Iron Values

Intensive characterization studies of iron ore slime carried out by X-ray diffraction spectroscope (XRD), scanning electron microscope (SEM-EDS), field emission scanning electron microscope (FESEM), and quantitative mineralogical evaluation by scanning electron microscope (QEMSCAN) are discussed. In slimes, mineral phases like hematite, goethite, gibbsite, kaolinite, and quartz are present in a complex and intricate way. SEM-EDS and QEMSCAN studies indicate that significant amounts of aluminum are associated with both ochreous and vitreous goethite. Hematite and goethite phases are contaminated with some amount of alumina and silica. The liberation of hematite in the coarser fraction (+500 µm) is only 20.6% compared to 40% in the finer fraction (?500 µm) size. A flow sheet, comprising of hydrocyclone and magnetic separation techniques, has been developed to produce an iron concentrate containing ～63% Fe with 70.7% weight recovery from a feed sample containing 56.8% Fe, 5.1% SiO₂, and 6.4% Al₂O₃.     

江西某铅锌银复杂多金属矿综合回收试验研究

江西某铅锌银多金属矿的特点是含硫高,并含有铅、锌、银、铁、锰等多种有用金属矿物可以回收利用.试验针对该多金属矿物中伴生复杂的情况,对比了铜铅锌优先浮选和铜铅锌优先浮选-锌粗精矿再磨-锌中矿磁选的工艺流程,后者获得了较好指标:铅精矿含Pb 49.57%,Pb回收率87.53%;锌精矿含Zn 45.82%,Zn回收率75.12%;硫精矿含S 44.69%,S回收率71.35%.针对铁锰以碳酸盐的形式存在,且与脉石伴生严重呈细粒嵌布的情况,采用了磁选-焙烧-磁选的试验方案回收浮选尾矿中的铁锰.      

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。     

Application of Surface Chemical Fundamentals to Improving Industrial Filtration Rates

The throughput of any process is limited by the step with the lowest throughput. In iron ore processing, filtration is used to dewater the iron ore concentrate created during reverse flotation. The conditions of the reverse flotation of iron ore and the efficient filtration of iron ore concentrate are found to be at odds with each other. We show that optimizing the filtration conditions should reduce cation retention in the filter cake, which also improves pellet quality in laboratory scale work. Experimental work was performed to investigate potential implementations at plant scale. Based on data collected at operating magnetite concentrators, it has been found that adding CO₂ into the filter slurry can increase filtration rates dramatically. In plant scale work, filtration rates were increased by up to 23.7% with the addition of 0.54kg of CO₂/ton of feed. We compare these results with laboratory scale results on the same process and elaborate on the theory leading to this discovery, while considering its potential impact on final pellet and iron product quality.     

综合回收选铜尾矿中有价元素的研究

某选铜尾矿含铁、硫等有价元素,磁选法选铁时,铁精矿品位只有60%左右、含硫大于2%、含硅13.67%,为不合格产品。通过研究,制定了浮选脱硫-弱磁选铁-反浮选降硅的选别工艺,可得到铁品位66.82%、回收率82.73%的铁精矿和硫品位36.42%、回收率87.89%的硫精矿。     

某细粒铁粗精矿提纯试验研究

介绍了某铁粗精矿的工艺矿物学性质,根据试样的矿石性质,确定采用硫浮选—磨矿—磁选工艺流程,获得了全铁66.25%、含硫0.50%的铁精矿。     

白云鄂博氧化矿选矿工艺优化试验研究与应用

在白云鄂博氧化矿石工艺矿物学特征分析基础上,结合白云鄂博氧化矿选矿工艺流程中中磁-强磁选工艺现状,通过中磁给矿与强磁精矿性质分析和强磁精矿反浮选试验研究,提出了优化中磁-强磁选工艺的方案与建议,经实验室试验研究,有效地提高了浮选给矿品位及最终浮选精矿品位。     

Beneficiation of High-Aluminium-Content Hematite Ore by Soda Ash Roasting

High-aluminium-content iron ore is one of typical intractable iron ores, and magnetic separation and floatation processes are found impracticable to remove alumina from the ore effectively. In this article, a new process, roasting with addition of soda followed by leaching, is developed to remove aluminium from the ore. Results show that Al₂O₃ content decreases from 8.16% in raw ore to 2.13% in iron concentrate, and total iron grade increases from 48.92 to 63.21% when the ore is roasted at 1000°C for 15 min with the addition of 14.0% (wt.) sodium carbonate. Mechanisms of aluminium–iron separation were studied by using XRD, SEM, and thermodynamic methods, and it is shown that aluminium is transformed into sodium aluminosilicate, sodium aluminate, and corundum during roasting; sodium aluminate is able to be leached by water, so is sodium aluminosilicate by dilute acid solution, while corundum remains in the iron concentrate.     

南芬红铁矿选矿工艺研究

介绍了南芬红铁矿工艺矿物学特征和选矿试验研究情况,以及采用阶段磨矿—弱磁—强磁—阴离子反浮选工艺流程的扩大连选试验结果。连选试验获得品位65.84%,回收率91.13%的铁精矿,为红铁矿综合利用和选厂工业设计提供了可靠的依据。     

哈西亚图金矿选矿综合回收利用研究

哈西亚图铁多金属矿床中共生的金矿规模已达中型,可大大提高该矿床的经济效益,对金矿综合回收利用方法的研究显得尤为重要。矿石工艺类型为中硫化物矽卡岩型金矿石,矿石自然类型属混合矿。矿石中主要金属矿物为磁铁矿、磁黄铁矿和黄铁矿,贵金属矿物为自然金和银金矿。通过试验研究,浮选工艺推荐“浮选金-尾矿磁选铁-铁精矿浮硫”方案,浸出工艺推荐“全泥氰化炭浸提金-尾渣磁选铁-铁精矿浮硫”方案。试验结果表明,采用全泥氰化炭浸-磁选铁（浮选除硫）工艺处理哈西亚图金矿石效果最佳。     

大红山某铁矿提铁降硅选矿工艺的优化

大红山某铁矿样原来采用"磁选粗选+再磨(90%-200目)+磁选、重选精选+精选尾矿重选"的流程方案,由于铁精矿要用管道运输,细度要求达到80%-325目,所得铁精矿还需再磨,因此有必要考虑在更细再磨条件下的选矿试验,最终确定采用磁选粗选+再磨(80%-325目)+磁选精选+精选尾矿重选(摇床或离心机)流程,得到了较好的选矿指标。     

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．     

从选铁尾矿中回收白钨选矿试验研究

对某选铁尾矿中的白钨进行了综合回收试验研究。根据试料性质,采用了弱磁选-重选-强磁选、弱磁选-重选、弱磁选-重选-浮选等3种方案进行白钨选矿试验,最终确定弱磁选-重选-浮选工艺。试验结果为铁精矿品位Fe65.89%,回收率22.07%,钨精矿品位WO351.64%,回收率为10.94%的分选指标。