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《中国钨业》2017,(1):51-54
河南某白钨尾矿中萤石含量占25%左右,是亟待回收的矿产资源。尾矿中碳酸钙含量在45%以上,属典型的高钙型萤石。尾矿中萤石在白钨加温精选过程的高温条件下受到大量水玻璃的强烈作用,可浮性变差。试验表明,碳酸钙的可浮性明显好于萤石。本研究采用碳酸钙优先浮选—再萤石浮选试验流程,以降低浮选流程中碳酸钙含量和提高萤石浮选粗精矿品位,为萤石精选提供有利条件。闭路流程试验结果表明:碳酸钙优先浮选,可以预先脱除72.44%的碳酸钙,萤石损失率仅为12.98%;最终得到含萤石91.88%,含碳酸钙4.32%,回收率为46.07%的萤石精矿。实现了该钨矿山企业的矿产资源的综合回收目标。 相似文献
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某难选白钨矿浮选工艺及流程试验研究 总被引:1,自引:0,他引:1
某矽卡岩型白钨矿有用矿物白钨嵌布粒度细,萤石、方解石等含钙矿物含量高,属于高含钙矿物的细粒难选白钨矿石.现场生产采用单一捕收剂及脉石抑制剂,白钨精矿质量及回收率均较低,为提高该白钨矿的选矿指标,进行了该矿石的大量工艺条件及工艺流程试验,结果表明:矿石经全浮脱硫后,采用水玻璃和六偏磷酸钠为脉石的组合抑制剂,油酸钠和731为白钨的组合捕收剂,经一粗三扫一精的闭路流程获得白钨粗精矿;粗精矿经过浓缩加温后,再经过一粗三扫五精的闭路流程浮选,获得了白钨精矿品位为65.16%,回收率为76.49%的较好的选矿指标,可为现场生产提高指标提供技术依据. 相似文献
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福建某钨选厂尾矿含钨偏高,约为0.16%,为了回收该尾矿中的钨矿物,实现矿产资源的综合利用,试验对该尾矿进行了矿石性质分析和选矿试验研究.试验结果表明,采用螺旋溜槽进行预富集,富集粗精矿再磨后,以水玻璃为矿浆调整剂,硝酸铅为活化剂,植物油酸为捕收剂进行浮选回收,浮选闭路试验经过一次粗选,两次扫选和三次精选,可以获得含钨30.45%,钨回收率52.17%的钨精矿.试验获得了良好的指标,使尾矿中的钨矿物得到了有效回收. 相似文献
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《中国钨业》2015,(5)
采用MLA技术对难选低品位钨钼矿石进行详细的工艺矿物学研究,测定了矿石矿物组成、嵌布粒度和解离度等工艺矿物学参数,为制定合理的选矿流程提供详实可靠的依据。结果表明,矿石中的主要有价矿物为白钨矿和辉钼矿;脉石矿物以石榴石(钙铁榴石、钙铝榴石)、透闪石、普通辉石、透辉石等磁性脉石为主,还有部分非磁性脉石石英、长石、萤石和方解石等。脉石矿物中富钙脉石含量较高,将对白钨矿选矿产生一定的影响。基于工艺矿物学的研究结果,选矿试验设计了强磁预先丢尾-先浮钼后浮钨的工艺技术路线,取得了钼精矿产率为0.125%,钼品位48.85%,钼回收率64.86%;钨精矿产率为0.27%,WO3品位65.23%,钨回收率74.22%的较好选矿技术指标。 相似文献
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高效钨捕收剂是细粒级钨资源浮选回收的关键因素。通过单矿物浮选试验研究了新型螯合捕收剂GYX和经典捕收剂GYB对白钨矿、黑钨矿以及主要脉石矿物的浮选行为影响,结果表明:采用GYX捕收剂对白钨矿和黑钨矿的最高浮选回收率与采用GYB相近,对萤石的浮选回收率比采用GYB低5个百分点,捕收剂药剂用量减少约50%。在此基础上,以某萤石含量高的钨多金属矿为试验对象,在原矿磨矿细度为-0.074mm占82.35%条件下,对含WO3 0.34%、CaF2 29.42%的原矿,采用GYX作钨捕收剂,进行钨浮选闭路试验可获得含WO3 40.57%、钨回收率为74.90%的钨精矿,取得较好的试验指标。 相似文献
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萤石提取后可以制备氟元素和各种氟的化合物,是一种战略非金属矿物。作为非金属矿物原材料,萤石工业用途十分广泛。中国萤石资源总体储量丰富,但资源禀赋差、品位低、性质复杂,多以伴生型萤石矿床为主,主要脉石矿物有石英、重晶石、碳酸钙等矿物。由于脉石矿物的物化性质与萤石矿相似,对萤石浮选提纯干扰较大,分离困难。本文总结了近年来伴生型萤石矿浮选分离的基础理论、工艺流程、药剂制度等方面的研究进展,总结了伴生萤石矿选矿研究的工艺、技术、药剂方面存在的问题和难点,并对伴生萤石矿选矿发展趋势进行了介绍。 相似文献
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某地多金属硫化矿中不同硫化物含金量的测定 总被引:1,自引:0,他引:1
采用0.05%SnCl_2—20%HCl作方沿矿的选择溶剂,浸渣以浮选法选出黄铜精矿及黄铁矿的混合精矿产品,与脉石分离。然后进一步浮选混合精矿,分别选出黄铜矿、黄铁矿,并通过矿物量及其含金品位,计算出各种矿物中含金量。 相似文献
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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. 相似文献
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广西某黑钨矿属石英脉石型黑钨矿床,原矿WO3品位为0.41%,采用"预先分级-中细粒级摇床抛尾-粗粒级磨矿-摇床精选-反浮选-磁选"工艺流程脱除绢云母、石英等脉石矿物,最终可获得产率0.47%、WO3品位67.31%,回收率77.16%的黑钨精矿。钨资源得到较好的回收。 相似文献
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某铅锌矿石铅锌矿物与脉石矿物共生关系复杂、嵌布粒度较细,矿石比较难磨,锌矿物及脉石矿物比较易浮,采用常规的浮选药剂,铅、锌精矿互含高,精矿品质低。原矿中主要金属矿物Pb品位为0.78%、Zn品位为5.55%;试验研究所确定采用原矿添加石灰磨至-0.074 mm占85%后,铅经一次粗选、一次扫选、四次精选产出铅精矿(铅粗精矿再磨至0.045 mm占95%),选铅尾矿锌浮选,经一次粗选、一次扫选、三次精选产出锌精矿和尾矿的工艺流程。添加新药剂T8、D88、酯-18;最终获得了铅精矿铅品位60.50%、回收率76.26%,锌精矿锌品位50.77%、回收率为87.40%的较好指标。 相似文献
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甘肃某难选金铜氧化矿金含量为4.83 g/t,铜含量为1.18%,铜氧化率高达95.87%.铜矿物以难选的硅孔雀石为主,且与脉石矿物关系密切,金与铜矿物呈伴生关系.对原矿工艺矿物学进行了系统的研究,分析了尾矿中铜、金损失的原因.在磨矿细度为-74 μm占80%,Na2S作硫化剂,CuSO4作活化剂,丁基黄药、羟肟酸和2... 相似文献
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Xumeng Chen 《Mineral Processing and Extractive Metallurgy Review》2018,39(5):289-307
Clay minerals are widely present in various ore deposits as gangue minerals. The processing of high-clay-content ores is becoming a significant challenge for the mining industry owing to the poor flotation performance caused by the presence of clay minerals. Different types of clay minerals are typically present in ore bodies, and they cause several detrimental effects to flotation that require different treatments. In this article, a comprehensive review of the studies on understanding and mitigating the negative effects of clay minerals in flotation is presented. It starts with a review of the classification and structures of clay minerals commonly occurring in ore deposits and their properties that determine the behavior of clay minerals in flotation. It is followed by a critical review of two main negative effects of clay minerals on flotation, the recent research findings mainly from The University of Queensland group. The first negative effect is the coating of clay minerals on the surface of valuable minerals that decreases the floatability of valuable minerals. The second negative effect is the formation of network structures in the slurry. Depending on the type and strength of the network structure, it can cause either high pulp viscosity or increased gangue entrainment, which reduces the flotation recovery and flotation product grade, respectively. In this section, the mechanisms and key factors behind each negative effect are presented and critically discussed. Then, the approaches and techniques developed to mitigate the different negative effects of clay minerals are reviewed. To conclude, future directions for a more complete understanding of mechanisms and problem solving are recommended. 相似文献