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乌努格吐山铜钼矿石工艺矿物学研究 总被引:3,自引:0,他引:3
对内蒙古乌努格吐山铜钼矿石进行了工艺矿物学研究,重点查明铜矿物、辉钼矿在矿石中的赋存状态、嵌布粒度等工艺特征;对矿石物质组成、矿石在不同磨矿细度条件下有益矿物单体解离度进行了系统考查。该研究主要是为回收矿石中有价金属,确定合理的选矿工艺流程及条件提供依据。对选矿产品进行了考查,以便检验选矿试验确定的工艺及条件的合理性。 相似文献
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为有效利用矿产资源,通过对哈萨克斯坦某金矿矿石性质分析、选矿试验研究,设计了合理的选矿工艺流程,3个矿区不同类型矿石进行分别分选。整体设计工艺为两段一闭路破碎,跳汰机重选预先抛尾,一段磨矿后尼尔森选矿机重选回收颗粒金,二段磨矿后浮选获得金精矿、铜精矿和铅精矿。工艺设计充分考虑了工艺流程的灵活性、合理性,为选矿厂选矿工艺设计及工程建设提供技术支持。 相似文献
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本文以四川牦牛坪氟碳铈矿矿石的性质,嵌布特性,通过小型试验研究对选矿工艺进行了广泛探讨,并且提出了脱泥──浮选、重选──浮选是较合理的选矿工艺流程。 相似文献
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本文介绍了文山二河沟难选白钨矿的矿石特性及其对选矿工艺的影响,进行了细磨后重选预先富集丢除尾矿、粗精矿磁选除铁、浮选除硫、重选进一步提高钨精矿品位的试验。在此基础上提出了采用重磁浮联合选矿工艺流程处理该矿石。 相似文献
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Hydrologic modeling of storm water impoundments is an effective tool in evaluating different water management options for addressing regional water issues in Florida. However, modeling impoundment water dynamics could be challenging because of the difference in scale between canals and the entire impoundment. Water pumped into the impoundments is first discharged into canals inside the impoundments, which distributes the water. The canal eventually overflows and water floods all the impoundment. Two modeling approaches to simulate this process were tested on two impoundments using the integrated MIKE-SHE and MIKE 11 model. The first approach simulates the one-dimensional flow in the canal in a link-node model; and once water floods, it is modeled as two-dimensional flow. The second approach simulates the entire impoundment as a canal. In both impoundments, Modeling Approach 1 resulted in overestimation of peaks and poor results. Modeling Approach 2 showed considerable improvements in the results and a satisfactory match between observed and simulated water levels. The difference is attributed to the difficulty in representing the canal flooding process in hydrodynamic models. 相似文献
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粉末注射成形充模过程凝固层形成规律研究 总被引:1,自引:0,他引:1
根据连续性、动量和能量守恒方程,以及固/液界面上能量平衡原理,建立了考虑凝固层后的一维流动模型。采用有限差分法,计算了模腔内壁上喂料凝固层厚度与工艺参数的关系,研究结果表明:模具入口附近凝固层厚度开始急剧增加,然后增加速率逐渐减缓;熔体体积流率越大,凝固层厚度越小;适当提高模具温度,可以减小凝固层厚度,有利于充模过程。 相似文献
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《粉末冶金学》2013,56(17):1-25
AbstractA survey has been carried out of the literature on hot-pressing theories and models. Theories as to the mechanism governing the process may be divided into two principal groups:(1) Mathematical representation of densification. Equations have been derived for mechanisms controlled by plastic or viscous flow. Also equations of a purely empirical nature have been advanced. In this group there is a trend towards a hyperbolic hot-pressing equation, which, according to tests, is valid for metals and metallic compounds over wide temperature ranges.(2) Theories asserting that the densification process is controlled by various processes, e.g. particle gliding, fragmentation, plastic flow, and volume diffusion. No complete mathematical formula has been proposed on this basis to describe the entire hot-pressing process. 相似文献
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万能轧机轧制H型钢的数值模拟分析 总被引:2,自引:0,他引:2
利用显式动力学有限元分析方法,模拟了H型钢在轧制过程中的变形情况,分析了影响金属流动过程的主要因素。研究结果表明,轧件的腿腰延伸比和腿宽对金属的流动趋势有明显的影响。 相似文献
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针对粗镍铁精炼技术新工艺,总结了目前国内外主要镍铁冶炼厂的粗镍铁精炼工艺流程并进行了比较.分析了镍铁中有害元素的来源,同时对3种典型的镍铁精炼工艺的应用及其同整个冶炼工艺流程的合理衔接进行了重点介绍,得出不同镍铁产品的精炼工艺不同,得到的产品品位也不同。 相似文献
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介绍了邯钢5#焦炉的工艺流程和自动化控制系统的主要调节参数,分析了基于Unity Quantum平台的焦炉自动控制系统升级改造方案,改造后系统运行平稳,焦炉生产正常。 相似文献