... a Mining Engineering Department, Cumhuriyet University, 58140 Sivas, Turkey. ... cyclone [8].... more ... a Mining Engineering Department, Cumhuriyet University, 58140 Sivas, Turkey. ... cyclone [8]. The BoxBehnken experimental design method has been employed for modeling and optimization of a multi-gravity separator to produce a celestite concentrate by Aslan [9]. Response ...
Transactions of Nonferrous Metals Society of China, 2013
ABSTRACT The application of the response surface methodology and the central composite design (CC... more ABSTRACT The application of the response surface methodology and the central composite design (CCD) technique for modeling and optimization of the influence of some operating variables on copper, molybdenum and rhenium recoveries in a bioleaching process was investigated. Three main bioleaching parameters, namely pH, solid concentration and inoculum percent, were changed during the bioleaching tests based on CCD. The ranges of the bioleaching process variables used in the design were as follows: pH 1.46–2.14, solid concentration 0.95%–11.05%, and inoculum percent 1.59%–18.41%. A total of 20 bioleaching tests were carried out by the CCD method according to software-based designed matrix. Empirical model equations were developed according to the copper, molybdenum and rhenium recoveries obtained with these three parameters. Model equations of responses at the base of parameters were achieved by using statistical software. The model equations were then individually optimized by using quadratic programming to maximize copper, molybdenum and rhenium recoveries individually within the experimental range. The optimum conditions for copper recovery were pH 1.68, solid concentration 0.95% and the inoculum 18.41% (v/v), while molybdenum and rhenium recoveries were 2.18% and 24.41%, respectively. The predicted values for copper, molybdenum and rhenium recoveries were found to be in good agreement with the experimental values. Also jarosite formation during bioleaching tests was also investigated.
In this study, the optimization of some parameters on agglomeration performance of Zonguldak bitu... more In this study, the optimization of some parameters on agglomeration performance of Zonguldak bituminous coal by oil agglomeration was discussed. A three-level Box–Behnken design combining with a response surface methodology (RSM) and quadratic programming (QP) were employed for modeling and optimization some operations parameters on oil agglomeration performance. The relationship between the responses, i.e., grade and recovery, and four process
In this paper, the multi-response optimization of grade and recovery simultaneously using Taguchi... more In this paper, the multi-response optimization of grade and recovery simultaneously using Taguchi quality loss function has been done for Zonguldak/Turkey bituminous coal by oil agglomeration. The controllable factors selected in this investigation are solid content, amount of oil, agitation time and agitation rate. The percentage contribution of each controllable factor has been determined on the performance of oil agglomeration.
A new nitrate-selective liquid-membrane electrode based on the tris(2,2',2"-sali... more A new nitrate-selective liquid-membrane electrode based on the tris(2,2',2"-salicylideneimino)triethylamine-iron(III) complex has been developed. This electrode exhibits a linear Nernstian response over the range 10(-1)-10(-4) M of nitrate, with a slope of 54.3 +/- 0.9 mV per p[NO3]. The effects of the pH and the liquid-membrane composition were also investigated. The lifetime of the electrode is at least one month. The selectivity coefficients for ten monovalent ions were calculated. The preparation procedure of the electrode is very easy and inexpensive. Moreover, the proposed electrode was applied for the determination of nitrate in fertilizers.
Mineral Processing and Extractive Metallurgy Review, 2010
In this study, application of the Response Surface Methodology and the Central Composite Design (... more In this study, application of the Response Surface Methodology and the Central Composite Design (CCD) technique for modeling and optimization the influence of some operating variables on gold and silver recovery in a cyanidation process were investigated. Three ...
... a Mining Engineering Department, Cumhuriyet University, 58140 Sivas, Turkey. ... cyclone [8].... more ... a Mining Engineering Department, Cumhuriyet University, 58140 Sivas, Turkey. ... cyclone [8]. The BoxBehnken experimental design method has been employed for modeling and optimization of a multi-gravity separator to produce a celestite concentrate by Aslan [9]. Response ...
Transactions of Nonferrous Metals Society of China, 2013
ABSTRACT The application of the response surface methodology and the central composite design (CC... more ABSTRACT The application of the response surface methodology and the central composite design (CCD) technique for modeling and optimization of the influence of some operating variables on copper, molybdenum and rhenium recoveries in a bioleaching process was investigated. Three main bioleaching parameters, namely pH, solid concentration and inoculum percent, were changed during the bioleaching tests based on CCD. The ranges of the bioleaching process variables used in the design were as follows: pH 1.46–2.14, solid concentration 0.95%–11.05%, and inoculum percent 1.59%–18.41%. A total of 20 bioleaching tests were carried out by the CCD method according to software-based designed matrix. Empirical model equations were developed according to the copper, molybdenum and rhenium recoveries obtained with these three parameters. Model equations of responses at the base of parameters were achieved by using statistical software. The model equations were then individually optimized by using quadratic programming to maximize copper, molybdenum and rhenium recoveries individually within the experimental range. The optimum conditions for copper recovery were pH 1.68, solid concentration 0.95% and the inoculum 18.41% (v/v), while molybdenum and rhenium recoveries were 2.18% and 24.41%, respectively. The predicted values for copper, molybdenum and rhenium recoveries were found to be in good agreement with the experimental values. Also jarosite formation during bioleaching tests was also investigated.
In this study, the optimization of some parameters on agglomeration performance of Zonguldak bitu... more In this study, the optimization of some parameters on agglomeration performance of Zonguldak bituminous coal by oil agglomeration was discussed. A three-level Box–Behnken design combining with a response surface methodology (RSM) and quadratic programming (QP) were employed for modeling and optimization some operations parameters on oil agglomeration performance. The relationship between the responses, i.e., grade and recovery, and four process
In this paper, the multi-response optimization of grade and recovery simultaneously using Taguchi... more In this paper, the multi-response optimization of grade and recovery simultaneously using Taguchi quality loss function has been done for Zonguldak/Turkey bituminous coal by oil agglomeration. The controllable factors selected in this investigation are solid content, amount of oil, agitation time and agitation rate. The percentage contribution of each controllable factor has been determined on the performance of oil agglomeration.
A new nitrate-selective liquid-membrane electrode based on the tris(2,2',2"-sali... more A new nitrate-selective liquid-membrane electrode based on the tris(2,2',2"-salicylideneimino)triethylamine-iron(III) complex has been developed. This electrode exhibits a linear Nernstian response over the range 10(-1)-10(-4) M of nitrate, with a slope of 54.3 +/- 0.9 mV per p[NO3]. The effects of the pH and the liquid-membrane composition were also investigated. The lifetime of the electrode is at least one month. The selectivity coefficients for ten monovalent ions were calculated. The preparation procedure of the electrode is very easy and inexpensive. Moreover, the proposed electrode was applied for the determination of nitrate in fertilizers.
Mineral Processing and Extractive Metallurgy Review, 2010
In this study, application of the Response Surface Methodology and the Central Composite Design (... more In this study, application of the Response Surface Methodology and the Central Composite Design (CCD) technique for modeling and optimization the influence of some operating variables on gold and silver recovery in a cyanidation process were investigated. Three ...
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