某难选铜硫矿选矿新工艺研究

针对某难选铜硫矿性质,进行优先浮铜,铜粗精矿再磨,铜尾矿选硫的选别工艺,以乙黄药+JQ-1为高效组合捕收剂,新型抑制剂KT-2为铜硫分离抑制剂,采用优先选铜-粗铜精矿再磨-选铜尾矿选硫的选矿工艺流程,进行铜硫浮选试验,最终获得铜品位为22.45%、回收率为86.09%的铜精矿和硫含量为30.35%、回收率为66.29%的硫精矿,实现了铜硫的分离及铜硫的综合回收。     

新疆某低铜辉钼矿浮选试验研究

新疆某辉钼矿含钼0.12%、铜0.009%,针对矿石中有微量的黄铜矿与辉钼矿连生的性质,为降低钼精矿含铜量,提高钼精矿品位与回收率,采用铜钼混选-粗精矿再磨-抑铜浮钼工艺流程进行了试验研究。结果表明：在试验获得的工艺参数下,得到的钼精矿钼品位49.55%、钼回收率82.41%;铜粗精矿含铜0.25%、金2.45 g/t,铜、金回收率分别为89.85%和63.12%;原矿中0.14 g/t的金主要富集在铜粗精矿中。试验有效回收钼的同时,实现了对铜、金的综合回收。     

含铜硫精矿铜、硫分离浮选试验研究

对含铜硫精矿进行铜、硫分离浮选试验。试验结果表明:硫精矿不磨和再磨后,采用一次粗选、一次精选、一次扫选浮选工艺流程,均能获得铜品位7%~8%的铜精矿。该精矿经湿法冶金工艺处理后,可综合回收铜、锌、金、银等,以此可提高企业的经济效益。     

某含金铜矿石低碱度抑硫提铜试验研究

某含金铜矿石中黄铁矿天然易浮,石灰法难以抑制。通过采用低碱度工艺,实现了该矿石铜硫的有效分离。试验结果表明:在p H值为9.5条件下,采用石灰-次氯酸钙组合抑制剂,浮选闭路试验获得了较好指标,铜精矿铜品位较石灰法提高了4.49百分点,同时伴生金、银的回收率也分别提高了8.11百分点、4.77百分点。     

城门山铜矿低碱度铜硫分离技术

针对城门山铜矿床的矿石性质和选矿生产现状,通过低碱度铜硫分离各种选矿流程试验。以少量石灰作调整剂,使用DT一4。抑制剂,可以实现低碱度铜硫分离,提高铜精矿品位,且降低了城门山铜矿尾矿废水pH值及处理费用。     

陕西某低品位铜钼矿选矿试验研究

The copper grade the low-grade copper-molybdenum ore in Shaanxi is 0.32% and the molybdenum grade is 0.048%.The copper and molybdenum minerals mainly exist in the form of sulfide ore. The properties are complex that there are many kinds of minerals in the ore, which are closely distributed and fine dissemination size. According to the properties of the ore, the technological process of bulk flotation and separation of copper and molybdenum was adopted in the experiment. With lime as regulator and reagent L03 as collector, the mixed concentrate of copper and molybdenum was obtained by the bulk flotation which flow-sheet is one roughing, three refining and two scavenging process. Then regrinding the mixed concentrate, use sodium sulfide as inhibitor of copper minerals, sodium silicate as slurry dispersant and inhibitor of silicate gangue minerals , kerosene as collector, can separate copper and molybdenum with the flow-sheet which one roughing, five refining and three scavenging. The copper concentrate with copper grade of 18.82% and copper recovery rate of 85.35% and molybdenum concentrate with molybdenum grade of 47.14% and molybdenum recovery rate of 79.24% were obtained by the final closed-circuit flotation test process, the indicator is nearly ideal.     

顽石作为磨矿介质在含金铜硫分离中的试验研究

半自磨机排出的顽石硬度大、球形度高,具有磨矿介质特征。针对某铜硫金矿选矿厂分级机沉砂样,以顽石与钢球混合配比作为粗磨磨矿介质、全顽石作为粗精矿再磨介质,采用“铜硫混合浮选-粗精矿再磨-铜硫分离”工艺流程进行了浮选试验。在最佳条件试验的基础上进行闭路试验,最终可获得铜品位为18.45%、铜回收率为86.89%,金品位为16.68×10-6、金回收率为55.78%的铜精矿,高于工业生产实际指标。试验证实了顽石作为磨矿介质,在粗精矿细磨领域具有非常好的应用前景。     

永平铜矿铜、硫分离工艺的生产实践

本文论述了永平铜矿10年生产实践在铜、硫分离工艺中所采取的主要措施,并进一步探讨降低硫精矿含铜量,提高铜、硫分离效率和回收率的途径.     

某铜钨钼多金属矿综合回收试验研究

某大型铜钨钼多金属矿,有价金属储量大、组分多,主要有铜、钨、钼金属,矿石性质复杂,选别分离难度较大。通过对该矿石进行工艺矿物学及选别工艺的综合研究结果表明,采用铜钼混浮—混浮尾矿浮重联合回收钨工艺流程处理该矿石可获得较好的回收指标,最终获得铜品位为21.89%、回收率为94.62%的铜精矿;钨品位为63.10%、回收率为86.77%的钨精矿;钼品位为48.96%、回收率为92.54%的钼精矿,达到了综合回收的目的,为该矿的后续开发及选厂建设提供了技术依据。     

香格里拉铜硫矿选矿工艺研究

针对香格里拉铜硫矿的矿石性质,进行了先铜后硫的优先浮选工艺流程和铜硫混选一分离工艺流程及这两种工艺的粗精矿再磨试验研究,通过对三种工艺流程浮选指标的对比,最终确定了原矿磨矿（80％．74μm）人选的优先浮选工艺流程,在其小型闭路试验中可以获得铜品位19．80％,铜回收率83．06％的铜精矿;硫品位40．35％、硫回收率66．32％的硫精矿。有价元素铜、硫得到了有效回收。     

回收某磁铁矿尾矿中硫和铁的试验研究

包钢选矿厂每年产生大量磁铁矿选铁尾矿,这部分尾矿中硫、铁等有用矿物含量较高,通过磨矿使其达到单体解离,采用磁选—浮选工艺流程,获得品位43.39%、回收率41.54%的硫精矿和品位63.93%、回收率8.93%的铁精矿。在减轻尾矿排放压力的同时,创造出巨大的经济效益和社会效益。     

某选铁尾矿回收云母选矿试验研究

我国许多钢铁矿山企业铁矿石中伴生有云母,但在选铁过程中通常将其作为脉石矿物而随尾矿排放。某铁尾矿通过脱泥-碱性浮选选矿工艺研究可以回收产率10.17%,云母矿物含量96.19%的高纯度云母,有效地回收其中的云母资源,降低了尾矿排放量,具有良好的经济效益和社会效益。     

铜冶炼渣选铜尾矿还原焙烧—磁选回收铁工艺研究

以炭粉为还原剂,通过还原焙烧—磁选工艺从铜冶炼渣选铜尾矿中回收铁,考察了影响铁回收效果的主要工艺参数,并通过试验验证。结果表明,在炭粉用量为铜渣量的25%、氧化钙用量为铜渣量的10%、焙烧温度1 300℃、焙烧时间1.5h、焙烧产物磨细度为-0.074mm占55%的条件下,磁选精矿(即还原铁粉)铁含量可达92.16%,尾矿铁含量可降低至3.91%,铁回收率87.65%。     

Recovery of Ultra-Fine Iron Ore from Iron Ore Tailings

Many attempts has been taken for further utilisation of the tailings and slimes through different routes i.e. beneficiation, agglomeration etc. Though the slimes and tailings contain huge ultra fines, conventional beneficiation methods many not be much effective for handling because of particle size limitations. Physicochemical method i.e. selective flocculation is a process for handling the ultrafine particles present in the tailings. Review shows that selective flocculation technique have very limited commercial application. Here the study focuses on the application of selective flocculation process for beneficiation of synthetic mixtures of iron ore and kaolinite as well as iron ore tailings. Results show that it is possible to achieve 65.78(%) of Fe, with 2.65% Al₂O₃, 3.66 SiO₂ (%) in the concentrate using synthetic mixture feed and more than 60% of Fe is obtained from natural iron ore tailings.     

低金高硫铜矿石回收金选矿试验研究

铜硫矿中低品位伴生金由于难富集到计价品位而常被忽略回收。针对含铜1.84%、含硫11.09%、含金0.12×10^-6的低金高硫铜矿石,采用P10作为选铜金捕收剂,H₂SO₄作为选硫活化剂,丁黄作为选硫捕收剂,在低碱条件下,闭路试验可获得含铜20.98%、铜回收率为86.23%,含金1.2×10^-6、金回收率为74.80%的铜金精矿及硫品位为48.9%、硫回收率为74.47%的合格硫精矿,实现了铜、硫、金的高效综合回收。低碱度铜硫分离工艺使活化剂用量大为减少,有利于硫的综合回收,降低了选矿成本。     

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.     

某难选氧化铜铅矿选矿试验研究

云南某铜铅矿原矿含铜0.59%、含铅2.40%、含银41.61 g/t,铜的氧化率69.59%、铅的氧化率68.33%,是一个氧硫混合铜铅矿。针对该矿石氧化率高的特点。进行了不同硫化剂、工艺流程来回收氧化铜和氧化铅的试验研究。试验结果表明以硫化钠为氧化铅的硫化剂,以D2为氧化铜的硫化剂,可实现氧化铅与氧化铜的有效选别与分离,得到的氧化铜精矿铜品位25.29%,回收率44.49%,含银1044.90 g/t;氧化铅精矿铅品位55.71%,回收率41.99%,含银364.7 g/t。     

采用二次铁尾矿改性添加剂制备球团试验研究

采用姑山矿业公司二次铁尾矿进行改性处理,制备成一种新型铁矿球团添加剂,在实验室进行了造球及焙烧试验。研究结果表明:配加改2和改4添加剂1.7%,即可获得性能较好的生球,生球落下强度分别为2.2次/个和2.4次/个,抗压强度分别为17.00 N/个和17.85 N/个,爆裂温度600℃;成品球抗压强度分别为3 141 N/个和3 174N/个,球团质量接近于配加1.7%膨润土的球团。     

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。     

A Comparative Study of Ultra-Fine Iron Ore Tailings from Brazil

This paper presents a characterization study of ultra-fine solid particles contained in slimes of some iron mines from the Iron Quadrangle, Minas Gerais State, and from the Carajás region, Pará State, Brazil. This characterization is expected to provide a basis for the development and choice of mineral-processing techniques suitable for the tailings characteristics of each mine. Particle size separation was done by wet sieving and in a cyclosizer, whereas particle size distribution was determined by laser diffraction (Cilas). The powders were further characterized by chemical analysis, X-ray diffraction, scanning electron microscopy, and Mössbauer spectroscopy. The tailings had a significant content of iron (from 44% to 64%), mainly in the form of hematite (α-Fe₂O₃) and goethite (α-FeOOH). Mössbauer results showed that the amount of goethite increased as the particle size decreased. Furthermore, the hematite content was always greater in the coarser fractions (>10 μm). The phosphorus contents were high and associated with the presence of goethite in most samples. Scanning electron microscopy showed that the vast majority of the particles were not spherical and that the cyclosizer does not separate the material in the intended fractions efficiently. The particles obtained by wet sieving had much more uniform shape and size.