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齐大山鞍山式氧化铁矿石铁品位为28.09%,铁主要以赤铁矿、磁铁矿和褐铁矿的形式存在。原采用阶段磨矿—1段强磁选—螺旋溜槽重选—2段强磁选—反浮选流程选别,铁精矿回收率为75.30%,铁损失较大。为提高铁回收率,对磁选精矿采用SLon离心选矿机代替反浮选进行流程改造试验。结果表明,其他流程不变,磁选精矿经离心选矿机1粗1精选别,粗选尾矿+0.037 mm粒级由离心选矿机1次扫选,-0.037 mm粒级由摇床1次扫选,最终全流程闭路试验可获得铁精矿品位67.57%,铁回收率84.73%,尾矿含铁6.62%的良好指标。与现在生产流程相比,铁精矿回收率提高了9.43个百分点,产率增加约12个百分点,选矿成本大幅降低,经济效益可观,试验结果可作为选厂工业生产流程改造的参考依据。 相似文献
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强磁选和重选联合回收尾矿和冶炼尾渣中铁的研究 总被引:3,自引:1,他引:2
采用SLon立环脉动高梯度强磁选机和离心选矿机重选联合工艺,可以有效回收选矿尾矿、赤泥、浸金尾渣和焙烧中矿的铁资源。研究表明,首先采用SLon立环脉动高梯度强磁选机在背景场强0.7~0.9 T下粗选抛尾,抛除大量的脉石矿物,使铁矿物得到富集;再对强磁选粗选精矿采用离心选矿机在转速为400 r/min,洗涤水为2 400~2 600 mL/min进行精选,可以得到Fe品位60%以上的铁精矿,并且有较高的精矿回收率。 相似文献
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国外某块状铬铁矿原矿Cr_2O_3品位28.43%,铁品位9.23%,对该矿石进行了物理分选探索试验。研究内容包括在不磨细条件下进行强磁选、重选跳汰、重选摇床试验,摇床磨矿细度试验,重选中矿回收试验,重选尾矿强磁选回收铬铁矿试验,螺旋溜槽重选粗选-重选中矿摇床精选试验及实验室扩大试验等。最终确定采用螺旋溜槽粗选抛尾-粗精矿摇床精选再选的工艺流程,获得了铬精矿产率45.59%、Cr_2O_3品位51.37%,Cr_2O_3回收率82.38%的选别指标,精矿产品里有害杂质硫、磷和二氧化硅含量不超标,为0.003%、0.011%和4.78%,Cr_2O_3/FeO为9.80,完全能达到冶金用铬精矿工业指标要求。 相似文献
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《现代矿业》2021,(8)
内蒙古某铁矿选铁尾矿TiO_2含量2.65%,TFe含量10.18%,钛主要赋存于钛铁矿和钛磁铁矿中,钛在细粒级有明显的富集现象,-0.5 mm粒级TiO_2品位为3.09%。为确定钛回收流程进行了选矿试验。试验结果表明,试样采用隔粗(+0.5 mm)筛分—筛下螺旋溜槽预抛尾—预抛尾精矿磨矿—弱磁选选铁—弱磁选尾矿螺旋溜槽2次粗选—2次粗选精矿再磨矿—摇床1粗1精1精扫重选流程处理,最终获得产率0.95%、TFe品位54.32%、TFe回收率5.07%的铁精矿,产率1.92%、TiO_2品位39.52%、TiO_2回收率28.63%的摇床精选钛精矿,以及产率0.20%、TiO_2品位31.83%、TiO_2回收率2.40%的摇床精扫选钛精矿,钛精矿总产率2.12%、TiO_2品位38.79%、TiO_2回收率31.03%。 相似文献
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对兖矿集团收购澳大利亚菲利克斯公司过程中强化风险控制的做法进行分析——注重培育资本、技术、管理和品牌优势,坚持循序渐进原则从点上积累经验,收购过程注重策略和技巧。 相似文献
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The need for an accurate and comprehensive understanding of load behaviour in industrial mills is outlined, and the implications of the availability of techniques for measuring load behaviour in these mills for both design and control is explored. Some research performed on a pilot mill used to investigate the effect of grid liners on autogenous milling is described. Considerable slip between liners and load occurred, with the result that a simple torque model (taking into account the orientation of the load and the slurry pool as measured by conductivity probes passing through the mill shell) was adequate for describing mill power at high mill speeds. The different behaviour of overflow and discharge mills as affected by slurry and load volume was explored. Some work involving the measurement of the axially distributed behaviour of the load in an industrial mill is then described. Liner movement, load orientation (measured with conductivity probes) and load temperature were measured as a function of axial position. The load orientation was found (surprisingly) to be almost independent of axial position but was a strong function of load volume. The axial temperature profile correlated in a logical fashion with other operating conditions. The relevance of these measurements for mill control is explored. 相似文献
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东坑仔煤矿在开采后期,通过不断深化挖潜存量资源,进行生产技术改造,加大对老区地质找煤复采力度,取得了良好的效果。该矿针对薄硬煤开采过程中存在的问题,提出了改进薄硬煤层开采的技术措施。 相似文献
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我国煤矿瓦斯抽采与利用的现状及问题 总被引:7,自引:0,他引:7
分析了我国煤矿瓦斯抽采现状,提出我国煤矿瓦斯抽采利用领域存在抽采难度增大,技术与装备落后,基础理论研究和技术创新不足以及国家税收、财政等鼓励政策力度不足等问题,并有针对性地提出对策建议。 相似文献
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地下水同井抽回井施工技术与应用研究 总被引:3,自引:1,他引:2
地下水同井抽回井主要应用于浅层地热能开发。细颗粒地层中地下水抽回井的比例模式多数为1∶3~1∶6,不仅增加建设成本,而且造成占地面积大、管理不便和回灌困难等问题。针对该问题,通过分析和研究,利用钻探理论和水文地质条件设计了"同井抽回两用系统",实现了在同一口井内抽水和回灌之目的,并在实际工程中取得了较好的效果。就钻井设备选择、成井工艺及应用效果进行了详细阐述。 相似文献
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Kumar Dheeraj 《煤炭学报(英文版)》2010,16(3):277-283
There is tremendous growth in the use of Geographic Information Systems (GIS), Global Positioning Systems (GPS), Remote Sensing,
Satellite Communication, and Modeling &; Simulation techniques. These tools and techniques helps significantly in characterizing
infrastructure, risk area and disaster zones, planning and implementation of hazards reduction measures etc. Communication
satellites becomes vital for providing emergency communication and timely relief measures. Integration of space technology
inputs into natural disaster monitoring and mitigation mechanisms is critical for hazard reduction. This paper mainly focused
on all the issues described above. Major emphasis had been given to the recent developments in information &; communication
technology enabled tools and their applications in mining industries for safe mining operations with increased productivity. 相似文献