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M16、M17捕收剂对提高伴生金、银回收率的试验研究 被引量:4
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作者 许长生 《黄金》 CAS 北大核心 1998年第9期47-50,共4页
M16、M17属于M系列新型捕收剂。根据凤凰山铜矿选矿厂矿石性质及工艺特点,确定以现场生产流程为基础,在半优先、混合浮选中用M16、M17代替原生产中用的OSN43号、丁基铵黑药。通过小型试验、工业试验及生产试用结... M16、M17属于M系列新型捕收剂。根据凤凰山铜矿选矿厂矿石性质及工艺特点,确定以现场生产流程为基础,在半优先、混合浮选中用M16、M17代替原生产中用的OSN43号、丁基铵黑药。通过小型试验、工业试验及生产试用结果表明,不仅可提高金、银、铜回收率为65%、439%、036%,而且能确保铜精矿品位,每年多创经济效益200万元以上。 展开更多
关键词 捕收率 金属回 选矿 铜矿
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Investigating the first-order flotation kinetics models for Sarcheshmeh copper sulfide ore 被引量:12
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作者 Asghar Azizi Ahmad Hassanzadeh Behnam Fadaei 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第5期849-854,共6页
This study was performed in two phases of work.In the first stage,four conventional first-order flotation kinetics models were fitted to the measured recoveries data and the best model were selected.In the second stag... This study was performed in two phases of work.In the first stage,four conventional first-order flotation kinetics models were fitted to the measured recoveries data and the best model were selected.In the second stage,influence of pH,solid concentration,water chemistry and the amount of collector dosage were investigated on kinetics parameters including flotation rate constant and ultimate recovery.The results indicated that that perfectly mixed reactor model and Kelsall model gave the best and the weakest fit to the experimental data,respectively.It was observed that flotation rate constant and ultimate recovery were strongly affected by chemical factors investigated especially water quality.The flotation rate constant decreased with increasing the solids content,while ultimate recovery increased to certain value and thereafter reduced.It was also found that the most values of flotation rate constant and ultimate recovery obtained in dosage of collector are 30 and 40 g/t,respectively. 展开更多
关键词 Copper ore FLOTATION Kinetics model Rate constant Ultimate recovery
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Study on Absorption and Regeneration Performance of Novel Hybrid Solutions for CO_2 Capture 被引量:1
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作者 Gao Jie Yin Jun +5 位作者 Zhu Feifei Chen Xin Tong Ming Kang Wanzhong Zhou Yanbo Lu Jun 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2016年第1期66-72,共7页
Recently, a kind of hybrid solution MEA-methanol shows a better CO_2 capture performance over aqueous MEA solution. However, the vaporization of methanol is the biggest disadvantage that hinders its application, so it... Recently, a kind of hybrid solution MEA-methanol shows a better CO_2 capture performance over aqueous MEA solution. However, the vaporization of methanol is the biggest disadvantage that hinders its application, so it is necessary to minimize the vaporization of methanol during both the absorption and regeneration processes. In this work, two kinds of hybrid solutions were studied and compared with aqueous MEA solution and MEA-methanol solution, including MEA/TEA/methanol solution and MEA/glycerol/methanol solution. The absorption property of MEA/glycerol/methanol solution is better than aqueous MEA solution within a certain period of time and the absorption property of MEA/TEA/methanol solution is too poor to be used in CO_2 capture. By increasing the concentration of TEA and decreasing the concentration of MEA, the absorption rate, CO_2 capture efficiency and absorption capacity all decreased. Upon adding glycerol, the cyclic capacity decreased and the generation temperature increased, and moreover, the density and viscosity also increased considerably. So after adding TEA and glycerol, the CO_2 capture performance of MEAmethanol solvent cannot be improved. 展开更多
关键词 CO2 capture MEA methanol glycerol hybrid solvent
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NONCONSTANT PREY HARVESTING IN RATIO-DEPENDENT PREDATOR-PREY SYSTEM INCORPORATING A CONSTANT PREY REFUGE 被引量:1
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作者 SAPNA DEVI 《International Journal of Biomathematics》 2012年第2期85-104,共20页
This paper deals with the problem of nonconstant harvesting of prey in a ratio-dependent predator-prey system incorporating a constant prey refuge. Here we use the reasonable catch-rate function instead of usual catch... This paper deals with the problem of nonconstant harvesting of prey in a ratio-dependent predator-prey system incorporating a constant prey refuge. Here we use the reasonable catch-rate function instead of usual catch-per-unit-effort hypothesis. The existence, as well as the stability of possible equilibria, is carried out. Bionomic equilibrium of the system is determined and optimal harvest policy is studied with the help of Pontryagin's maximum principle. The key results developed in this paper are illustrated using numer- ical simulations. Our results indicate that dynamic behavior of the system very much depends on the prey refuge parameter and increasing amount of refuge could increase prey density and may lead to the extinction of predator population density. 展开更多
关键词 PREDATOR-PREY prey refuge TAXATION RATIO-DEPENDENT stability bionomic equilibrium HARVESTING optimal equilibrium.
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