共查询到17条相似文献，搜索用时 323 毫秒
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优化浮选药剂制度设计 总被引：1，自引：0，他引：1
根据新兴选煤厂浮选药剂消耗过高的现状，通过分析释放试验分析煤泥的性质，了解煤泥中不同可浮性物料的数、质量的分布规律；并通过煤泥浮选的优化试验，确定浮选过程中的最佳药剂制度，从而提高浮选材煤的回收率，减少尾煤的排放量，提高尾煤的灰分，提高经济效益。 相似文献
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目前我国选煤厂浮选流程大多采用直接浮选和浓缩浮选,本文根据桃山选煤厂的生产实际,对直接浮选与浓缩浮选生产的工艺效果进行了对比分析. 相似文献
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《佳木斯教育学院学报》2016,(3)
以某选煤厂原煤为研究对象,探索了浮选柱泡沫层厚度、矿浆浓度以及药剂比对实验结果的影响,结果表明,捕收剂选用为煤油,用量为400g/t,起泡剂为仲辛醇,其比例为2:3,矿浆浓度为60g/L,泡沫层厚度为8cm时最优。 相似文献
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张锁君 《洛阳师范学院学报》2014,(5):62-64
研究了硫化矿和滑石浮选分离过程中羧甲基纤维素钠(CMC)的抑制机理,结果表明,CMC吸附在硫化矿表面主要是通过其中的羟基和羧基与硫化矿表面作用,羟基可以在硫化矿表面形成氢键,羧基能够与硫化矿发生静电作用和化学作用.硫化矿吸附CMC后,其表面负电性增强,疏水性减弱,同时CMC也会影响硫化矿捕收剂在硫化矿表面的吸附. 相似文献
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贵州花桥金矿浮选提金工艺试验研究 总被引：2，自引：0，他引：2
据矿石性质研究了磨矿细度、矿浆PH值、浮选药剂制度等条件对选金回收率的影响.试验表明,在最佳条件下,该矿石的金的回收率达95%以上. 相似文献
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本文研究了钒的沉淀浮选富集和溶剂浮选分离方法及其在食盐、模拟海水测定中的应用。 相似文献
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研究了在溴化十六烷基三甲基铵存在下碘化钾——孔雀绿——水体系浮选分离镉的行为及其与常见离子分离的条件。结果表明,控制水相pH=6.0,能使Cd(Ⅱ)与常见离子Zn(Ⅱ)、Cu(Ⅱ)、Ni(Ⅱ)、Mn(Ⅱ)、Fe(Ⅱ)、CO(Ⅱ)、Al(Ⅲ)分离。 相似文献
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研究了溴化十六烷基吡啶存在下硫酸铵—碘化钾—结晶紫体系浮选分离铋的行为及其与常见离子分离的条件.结果表明,在O.5mL溴化十六烷基吡啶(10g/L)存在下,当固体(NH_4)_2SO_4、碘化钾溶液(0.1mol/L)和结晶紫溶液(0.001mol/L)的用量分别为1.0g、1.0mL、1. 0mL时,控制pH值为7.0,Bi~(3+)可被该体系浮选,而常见离子Zn~(2+)、Fe~(2+)、Co~(2+)、Ni~(2+)、Al~(3+)不被浮选,据此实现了Bi~(3+)与这些离子的定量分离,对合成水样进行了定量浮选分离测定,结果满意。 相似文献
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Pulse electro-coagulation flotation was used to treat oil wastewater of high oil content. Different operational conditions were examined, including current density, reactive time, electrode distance, pH and pole switching time. Orthogonal tests were carried out to identify the optimal operational conditions for this technique. Considering the treatment cost and efficiency together the optimal operational conditions were an electrode distance of 3.3 cm, pH of 4, current density of 49.38 mA/cm2, reaction time of 15 min and pole switching time of 10 s. The removal efficiency of oil wastewater under normal conditions reached up to 96.21%. The influences of different factors on removal efficiency were in the following decreasing sequence： pH〉 current density 〉 pole switching time 〉 reactive time 〉 board distance. 相似文献
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采用水解酸化-气浮-生物接触氧化工艺处理印染废水,实践表明,当进水CODCr、BOD5、SS的浓度分别为580~890、150~210、450~690mg/L,p H值为9.0~11.0,色度为80~160倍时,出水CODCr、BOD5、色度、SS等各项指标均能达到《纺织染整工业水污染物排放标准》(GB 4287-2012)中的间接排放标准,运行费用为1.44元/t. 相似文献
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以一氯乙酸为醚化剂,在水相中制备了低取代度(DS)的羧甲基淀粉。在淀粉乳浓度29%,投料比n(ClCH2COOH)∶n(淀粉)=0.15∶1,反应温度50℃,反应时间10h的条件下,羧甲基淀粉的取代度为0.027 9。以此取代度的羧甲基淀粉作为抑制剂对红铁矿进行浮选实验,当用量为220g/t原矿时,精品位可达66.02%,回收率可达80.15%。 相似文献
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Joseph Snir Carol Smith Lorraine Grosslight 《Journal of Science Education and Technology》1993,2(2):373-388
In this paper, we consider a way computer simulations can be used to address the problem of teaching for conceptual change and understanding. After identifying three levels of understanding of a natural phenomenon (concrete, conceptual, and metaconceptual) that need to be addressed in school science, and classifying computer model systems and simulations more generally in terms of the design choices facing the programmer, we argue that there are ways to design computer simulations that can make them more powerful than laboratory models. In particular, computer simulations that provide an explicit representation for a set of interrelated concepts allow students to perceive what cannot be directly observed in laboratory experiments: representations for the concepts and ideas used for interpreting the experiment. Further, by embedding the relevant physical laws directly into the program code, these simulations allow for genuine discoveries. We describe how we applied these ideas in developing a computer simulation for a particular set of purposes: to help students grasp the distinction between mass and density and to understand the phenomenon of flotation in terms of these concepts. Finally, we reflect on the kinds of activities such conceptually enhanced simulations allow that may be important in bringing about the desired conceptual change. 相似文献