云南某含锡多金属硫化矿选矿实验研究

对云南某含锡多金属硫化矿进行了工艺矿物学和选矿实验研究. 结果表明,矿石中铅锌品位低,铅、锌矿物相互交代、包裹,嵌布粒度不均匀,采用优先浮铅、再选锌的原则流程,利用铅矿物与锌、硫矿物间可浮性差异较大的特点,采用石灰、亚硫酸钠和硫酸锌抑制锌、硫,以乙基黄药为铅捕收剂优先浮选铅矿物,选铅尾矿用硫酸铜作活化剂活化闪锌矿选锌;锡矿物与黄铁矿、磁黄铁矿等矿物共生关系复杂,且嵌布粒度较细,选锌尾矿经脱硫浮选后采用重磁联合流程回收锡矿物. 通过闭路实验,得到含铅40.92%、银1610.53 g/t、铅回收率81.25%、银回收率77.03%的铅精矿,锌精矿含锌43.23%、回收率为85.92%,硫精矿含硫42.57%,作业回收率为87.65%,锡精矿含锡42.38%,作业回收率为59.29%.     

浮选-浸出处理土耳其氧化铜矿工艺

采用浮选-浸出处理含铜2.09%的土耳其氧化铜矿,该矿有用矿物主要为孔雀石、蓝铜矿、硅孔雀石及少量硫化铜,铜矿物氧化率高,嵌布粒度较细,矿石易泥化. 通过浮选回收易浮的硫化铜和部分孔雀石和少量蓝铜矿,获得品位25.04%、回收率为57.25%的浮选铜精矿,浮选尾矿中的蓝铜矿和硅孔雀石采用硫酸浸出,含铜量由0.94%降至0.05%,浸出率达94.68%,实现了目的矿物的有效回收.     

Separation of Phosphorus and Magnetic Mineral Fines from Siderite Reductive Ore by Applying Magnetic Flocculation

The characteristics of siderite reductive ore and the ultrafine grinding-magnetic flocculation separation (MFS) of this ore were investigated in the present work. The results indicated that the iron phase in the raw ore was predominantly metallic iron with an iron particle size below 30 μm, and the phosphorus compound was apatite. By applying MFS to siderite reductive ore containing 37.14% Fe and 0.52 P, a concentrate assaying 66.37% Fe and 0.19 P with 74.32% recovery was produced. The iron recovery increased by 5.77% compared with the results of the conventional magnetic separation. The high efficiency in phosphorus removal and iron recovery achieved by the MFS process may be attributed to the adequate liberation of iron particles and the increase in magnetic force on the iron mineral fines in the form of flocs in a magnetic field.     

One Step Bioleaching of Sulphide Ore with Low Concentration of Arsenic by Aspergiilus niger and Taguchi Orthogonal Array Optimization

A study was carried out to examine the possibility for Aspergillus niger strain KBS4 to bioleach metals from sulphide ore with low concentration of arsenic and to optimize the parameters that affect this process by orthogonal array optimization. Fungal sample was collected, purified and sequenced. T     

Effect of Frothers on Bubble Size and Foam Stability in Potash Ore Flotation Systems

The objective of this project was to compare the effect of a selective flotation frother (MIBC) and powerful frothers (DEMPH and DF‐1012) on bubble size and foamability in water and in brine. In water, the bubble size is clearly reduced by flotation frothers which prevent bubbles from coalescing. The present study shows that the bubbles do not coalesce in brine and, therefore, frothers do not affect the size of bubbles in brine. The dynamic foamabality index measured in brine is much lower than that in water for weak frothers (e.g. MIBC); for both tested strong frothers the foamability measurements in brine reveal formation of meta‐stable foams.     

黑曲霉菌一步浸取低砷硫化矿:Taguchi正交优化(英文)

A study was carried out to examine the possibility for Aspergillus niger strain KBS4 to bioleach metals from sulphide ore with low concentration of arsenic and to optimize the parameters that affect this process by orthogonal array optimization. Fungal sample was collected, purified and sequenced. The bioleaching process was optimized with L25 Taguchi orthogonal experimental array design. Five factors were investigated and 25 batch bioleaching tests were run at five levels for each factor. The parameters were initial pH, particle size, pulp density, initial inoculums and residence time for bioleaching. The experimental results showed that under optimized leaching conditions: pH 5.5, particle size 180 μm, initial inoculums size 3×10 7 spores per ml, pulp density 15% and residence time of 20 days, the bioleach ability of metals were 63% Fe, 68% Zn, 60% As, 79% Cu and 54% Al. The biosorption of metal ions by fungal biomass might occur during the bioleaching process but it did not hinder the removal of metal ions by bioleaching.     

云南某萤石与重晶石共生矿选矿工艺

针对萤石重晶石共生矿可浮性相近、浮选分离困难的选矿难题,对云南某萤石重晶石共生矿进行了选矿工艺研究. 结果表明,原矿含重晶石44.38%,萤石20.21%,脉石矿物主要为石英. 经多个实验流程对比后,最终采用萤石和重晶石混合浮选流程,以皂化油酸钠为捕收剂. 采用抑重浮萤的流程,以硫酸铝为重晶石抑制剂,保证萤石可浮性. 经闭路分选流程得到品位96.13%、回收率88.74%的萤石精矿和品位87.65%、回收率97.78%的重晶石精矿.     

杨家坝铁矿磨矿分级流程探讨

介绍了杨家坝铁矿选矿时磨矿分级流程的基本情况,重点阐述了球磨机、旋流器、Derrick高频振动细筛以及砂泵之间的工作原理,探讨了生产工艺控制措施及目前磨矿分级流程存在的不足,提出了下一步改进的建议。     

磷矿浮选废水治理的探索与实践

酸碱中和破坏尾矿废水胶体分解系,使细悬浮微粒形成絮状沉淀物沉降在库区内,浑浊在尾矿废水变澄清,处理后的外排清水ｐＨ值控制在７－８时,其他各指标均达到国家二级排放标准。     

正交试验法及响应曲面法优化某铁矿细磨中间粒级产率的对比试验

基于正交试验法与响应曲面法,针对山西某铁矿磨矿产品中间易选粒级产率低的问题,通过单因素试验探究磨矿时间、磨矿浓度和介质充填率对中间易选粒级产率的影响规律,开展优化细磨中间粒级产率的试验研究.结果表明,采用正交试验法和响应曲面法得到的最优中间易选粒级产率分别为81.27％和81.80％.响应曲面法优化后得到的最佳磨矿条件...     

Optimal Recovery of Iron Values from a Low Grade Iron Ore using Reduction Roasting and Magnetic Separation

A low grade iron ore containing 51.6% Fe, 17.6% SiO₂, 4.3% Al₂O₃, and 3.8% LOI was subjected to reduction roasting followed by low intensity magnetic separation studies. The phase transformation of hematite into magnetite and fayalite due to reduction roasting was investigated using reflected microscope and X-ray diffraction (XRD) techniques. The effects of reduction variables such as reduction time (40?175 min), temperature (750?1000°C), and reductant dosage (3?11%) using activated charcoal were studied. The process was optimized by using central composite rotatable design (CCRD) and response surface methodology. Iron grade from 59?66% with recovery of 9.5?87% was achieved using CCRD experiments. Model equations were developed both for Fe grade and recovery and then optimized within the bounds of experimental conditions. The program predicted 63.3% Fe with 79% recovery with the following optimum conditions: temperature: 950°C, time: 53.04 min, and reductant: 3%.     

高磷铁矿含碳团块直接还原-磁选提铁

采用直接还原?磁选工艺从湖南某地高磷铁矿含碳团块中提铁,研究了还原温度、还原时间、团块碱度、还原剂焦粉用量、添加剂Na2SO4用量和废塑料替代焦粉量等因素对磁选精矿指标的影响. 结果表明,在还原温度1150℃、还原时间40 min、团块碱度0.8、碳氧摩尔比0.9的条件下,添加4% Na2SO4同时添加废塑料替代25%焦粉,可得到金属化率为88.77%的焙烧矿,磁选后可得到铁品位91.99%、金属化率92.26%及P含量0.20%的金属铁粉,铁回收率达86.74%.     

二氧化钛生产中风扫磨磨矿系统优化及改造

针对二氧化钛生产中风扫磨系统存在的问题,分析脉冲布袋除尘器制约产能的原因,提出解决减少停车时间的办法,制定并优化旋风分离器设计参数,从而提高分离效率,增加产能。     

铜铁分离工艺铁精矿过滤脱水的影响因素及应采取的措施

针对铜铁共生矿在先浮选铜精矿后磁选铁精矿、浮选药剂及其它对铁精矿过滤脱水产生的诸多影响因素,提出了解决的措施