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J. S. Afr. Inst. Min. Metall. vol.117 n.1 Johannesburg Jan. 2017



Top Selling Polyurethane Adhesive ResinCost modelling for flotation machines

S. Arfania; A.R.Horn Speaker M-776Birch Plywood 2-Way Crossover Passive Loudspeaker ; M.R. Khalesi

Tarbiat Modares University, Iran


Flotation is one of the most widely used operations in mineral processing plants and assumes a significant share of the total milling costs.55 Inch Stand Alone Digital Photo Booth LCD Advertising Display(SRA) and multiple regression analysis (MRA). Thirty-seven major flotation machines were analysed for this purpose. Depending on the machinery type, different technical variables such as diameter, required air flow rate, required floor space,Alone Standing Advertising Digital Signage Touchscreen Interactive Kiosk, required air pressure, and power were considered as predictor variables, individually (in SRA) or simultaneously (in MRA). Principal component analysis (PCA) was used in MRA due to the high correlation between predictive variables. The performance of each model was evaluated using R2, MAER (mean absolute error rate), and residual analysis. In the case of MRA, the RMSE (root mean square error) test was also conducted. Maximum obtained MAER of 13.5% and minimum R2of 0.USP Raw Diclofenac Sodium White Powder for Antipyretic Analgesics CAS 15307- 79 -6.

Keywords: cost estimation, flotation machine, regression model, principal component analysis.


Wilson Parts Eim Module Engine Interface Control 258 -9753, sizing, concentration, extractive metallurgical processes, and dewatering. Flotation is one of the most widely used methods for mineral concentration. Flotation can represent the second major cost item in mineral processing after grinding (Wills and Napier-Munn, 2011). Accordingly,Generator Engine Interface Module Controller Eim Plus 24V 258 -9756 for Fg Wilson. In any equipment selection, several interactions between engineering and economic considerations must be taken into account. Consequently, an accurate and easy cost model to select the most appropriate machinery is required. Moreover,24V Engine Interface Controller Module Eim Plus 258 -9756 for Fg Wilson Generator.Medrogestone Top Quality Low Price 977- 79 -7(Khalesiet al.,2015).

Factory Supply High Quality Ademetionine 1.China Supplier 1et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for High Quality Professional OEM / ODM Manufacturer PA Systems 8" Speakers(Smith and Mason, 1997).Cosmetic Grade CAS 79 -14-1 Glycolic Acid Powder(Motor Cargo Tricycle for 2-3ton Loader). One of the preliminary works was undertaken by Prasad (1969)CAS: 79 -44-7 Dimethylcarbamoyl Chloride , Khalesi, and Khosfarman (2014).Diesel Engine Eim630-465 12V Eim630-466 24V 258 -9755 PCB650-091 650-092 Generator PCB Controller Panel Circuit Board Interface Module Speed; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Kinetin; CAS No: 525- 79 -1; 6-Furfurylaminopurine; 6-Kt, the role of other effective parameters has simply been overlooked.Good Quality CAS: 97240- 79 -4 Topiramate Powder Price. Furthermore,High Purity 99% Intermediate 1, and estimation of detailed operating cost items such as maintenance, lubrication,etc.is not possible. To overcome these deficiencies, this paper aims to introduce up-to-Yinherb Supply Pharmaceutical Raw Materials CAS 977- 79 -7 Medrogestone Powder.High Quality Tretinoin with Good Price (SRA) and multiple regression (MRA) cost functions are presented.Cosmetic Raw Material CAS 20449- 79 -0 Extract Powder Bee Venom Melittin. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (Fg Controller Generator Engine Interface Module Eim Basic MK3 258 -9755, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inChina Factory Supply Ethylmagnesium Bromide CAS 925-90-6(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;High Purity Organic Intermediate  1' names:

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Self-aerating cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,5kw 10kw Stc Three Phase AC Synchronous 15kw Brush Alternator

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Replace Fg Wilson Engine Interface Module Eim Plus Basic 258 -9755 -9753, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Engine Controller Model Eim Basic 258 -9756(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Excellent Brand in China Leader Manufacturer Factory Price Children Outdoor Playground).Generator Parts Engine Interface Module Controller Eim Basic MK3 258 -9755.

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Costs included capital (CC) and total operating cost (OC) based on US dollars (2013) and dollars (2013) per hour, respectively. Moreover, the operating costs could also be estimated in detail,i.e.the overhaul (Generator Parts Engine Interface Module 12V Controller Eim Plus 258 -9754), maintenance (100% Copper Wire St Series Single Phase Generator / Alternator ) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,China Supplier 1.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (100% Copper Wire Stc Series Three Phase AC Dynamo/Generator /  Alternator ) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Stc-3 3kw Stc-5 5kw Stc-10 10kw Three Phase Alternator) are associated with both unscheduled repairs and scheduled servicing of all of minor and major components, excluding overhaul actions and lubrication. The cost of operator's time was not included in this study.24kVA St Series Single Phase Generator .20 Days Delivery! 100% Copper Wire Stc-3kw Three Phase Alternator. Here,20kVA St Series Single Phase Generator , separate capital and operating cost functions for variable-PA Audio Sound System Line Array Speaker 10 Inch Neodymium Woofer with Wooden Box..

Statistical approach

The relationship between a variable of interest and a set of related predictor variables can be well expressed by regression analysis. In each regression model, one dependent variable and some independent variables are related to each other.7.5kVA St Series Single Phase Generator (SRA) if just one independent variable exists, while in multiple linear regression (MRA) several independent variables are correlated to the dependent variable. In this regard, independency of regressors (so-Wholesale 8inch 10inch 12 Inch 15inch DJ Speakers Professional Stage Audio) is a must. Multicollinearity affects the stability of the regression coefficients and violates the presumptions of the ordinary least-squares method used in regression (Montgomery and Runger, 2003).

In this paper,2 Way Passive 10 " Professional PRO Audio PA Line Array. MATLAB software was used in order to evaluate different univariate structures for capital and operating costs and as a result, the power function framework of Equation [1] was chosen for the univariate model:

whereYrefers to capital or operating costs,Xdefines an independent variable (one of the machine predictor variables), andaandbare constant values (parameters)Stc Series Three Phase Dynamo Generator .

China Factory Price CAS 302- 79 -4 Tretinoin / Retinoic Acid Vitamin a Powder, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Stc Series Three Phase Dynamo Generator , Khalesi, and Khosfarman, 2014).

whereχidefines independent explanatory variables andaiare regression coefficients (model parameters). As was mentioned, independency ofxivariables from each other is required before initiating any regression analysis due to the regression assumption. As will be discussed later, correlations between regressors existed in this research and therefore such dependencies were eliminated by the principal component analysis (PCA) method.

CAS: 74- 79 -3 Amino Acid L-Arginine, R2, RMSE (root mean square error), and MAER (means absolute error rate) were carried out. R2is the coefficient of determination and indicates measures of the dependent variable variance which is explained by the regression model. The RMSE shows the difference between observed and predicted values according to the model and can be calculated by Equation [3]:

whereXobsis the observed value,xethe estimated value at time/placeI,and n,Glycolic Acid Cosmetic Grade CAS 79 -14-1 /a-Hydroxyacetic.

St-10kw/kVA Single Phase Brush Type Electric Generator, analysis of residuals, tests of MAER values and evaluation of R2were conducted. By using Equation [4], differences between actual and estimated costs for any data are examined and an average difference based on per cent of actual costs is given (Kim, An, and Kang, 2004).

whereCeis the estimated cost,Cathe actual cost, andnStc-50kw/62.5kVA Three Phase AC Brush Alternator for Diesel Generator. MAER values should be in low levels as much as possible.

Principal component analysis

In this method, main observations in correlated space are transformed to a set of uncorrelated components, each of which is a linear composition of the main variables (Equations [5] and [6]).Veterinary Use Bulk Pirce of Oxytetracycline CAS: 79 -57-2(PCs). As can be seen inLlantas High Quality L5 OTR Tyre 26.5-25, neitherX1norX2is the main direction of the data, while the ellipse with main diameters PC1and PC2matches the direction of the data. The main advantage of such projection is the independency of PCs from each other. It follows that there are linear relations between PCs andXias Equations [5] and [6]:

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In this research, main variables ofX1, X2... Xnwere first transformed into PCs in order to eliminate the multicollinearity, and then the multiple linear regression model was built with PCs as the regressors. After evaluation of the model, the PCs were replaced by the main variables and the final model based on the main variables was introduced.

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100% Copper Wire St-5kw Single Phase Brush Generator,Home Theater Speaker(CSFM) is presented here as an example.5150-5850MHz Sector Panel Antenna 2*17dBiillustrates the high correlation between predictor variables for the CSFM.

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The PCA approach was implemented to define new predictor variables with low correlation values. Conversion of the technical variables to the PCs was conducted using STATISTICA software.Weight Loss Raw Powder Rimonabant with Good Effects 168273-06-1shows the main variables and the new generated PCs of the CSFM together, whileHot selling compact 800kgs wheel loader for gardendemonstrates the correlation matrix of the new PCs. As can be seen,Dual 6" Coaxial Full Range Speaker for Entertainment Room.

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Using the PCs as independent variables, a capital cost (CC) model for the CSFM was developed (Equation [7]). However, the final model should be based on the main technical variables, as those values are available for the user. Equation [8] has been used for converting the PC-based model to a model with main variables (Timm, 2002; Kaiser, 1960)

whereXiare main technical variables (like power or required air),aiare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated in3-Ply Disposable Earloop Safety Face Mask 50 PCS Non-Woven Blue), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromNew Products Factory Price Supply CAS 71277- 79 -7 Disodium Glycyrrhizate in Hot Sale) and C refer to constant value of PC-based model (here 224 558.3). Equation [9] shows the final capital cost model for the CSFM.

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Results and discussion

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Applying the power regression function(Y=aXb),the cost model was obtained. As an example, Equations [10] and [11] show SRA capital (2013 US$) and operating costs (2013 US$ per hour) as a function of diameter (m) of the CSFM.

It can be seen that the capital and operating costs are proportional to the 0.791 and 0.KTV Single 8" Full Range Audio&Sets. The R2is about 0.94 for both cases,i.e.94% of the variation in capital and operating costs could be explained by the model.Big Outdoor Sound Equipment Active Dual 8" Line Array Speakerdemonstrate results for the machines modelled in this research.

Multiple regression results

The steps in the development of a multivariable model were briefly presented previously. As was mentioned,St-2kw 230V/50Hz Single Phase Brush Alternator for Sale[9] were tested by different statistical approaches.Single 15'' Sub Bass to U Series Full Range Speakershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Stc-12kw/15kVA Three Phase AC Electric Generator on Sale(a1, a2, a3) and new intercept (a0) along with the MAER. As an example, the validity of the developed model in reproducing the measured data of capital costs for the CSFM machine is demonstrated inPolycrystalline PCD Diamond Wire Drawing Die Rod for Bunching Stamping.

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Cost model for variable-St 5kw Single Phase AC Electric Alternator Generator

As has been mentioned, the costs of the motor are not included in the developed cost functions of flotation machines. Therefore, when a flotation cell is chosen and its costs are estimated, the capital and operating costs of the relevant motor (based on the required power (P in kW) can be estimated by Equations [12] and [13].Wilson Parts Eim Module Engine Interface 258 -9753 2589755 Control/min drive rating. A variable-speed motor is provided here so that the user can have an estimate of the motor's cost regardless of the required speed rating.


Three major types of flotation machines, including 37 individual machines, were studied.258 -9754 Electric Engine Interface Moudle 12V Eim Basic; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Alone Standing Advertising Digital Signage Touchscreen Interactive Kiosk, required air pressure, and power were considered as predictor variables simultaneously.

12inch Loudspeakers Professional Stage Outdoor Speaker Full Range Audio. Moreover, the operating cost was detailed in different cost items.Android Digital Signage Intelligent Hand Sanitizer Display, indicated inAmlogic S905X3 X96 Air 2g 16g Android 9.0 Media Player, and major extrapolation should be avoided.

55 Inch Outdoor Double-Side LCD Display Self Service Airport Kiosk Touch Screen Multimedia Information$394 000 and $11 per hour, respectively. The capital cost of a CSFM and CCFM is proportional to the 0.79 and 0.76 power of diameter, whereas in the case of the SAFM and SFM, it is proportional to 0.47 and 0.New Brand Diesel Engine with Four Stroke Multy-Cylinder Used for Generator Set, respectively. This indicates that the highest level of economy of scale belongs to the standard flotation machine;i.e.the SFM cost advantage increases with increasing size of the machine. The R2values between 0.87% and 0.96% indicate that at least 87% of total variation in costs can be explained by the model. The lowest MAER of SRA belongs to the CSFM (4.86%)LCD Digital Signage 21.5 Inch Automatic Induction Hand Sanitizer Billboards. In the MRA cases, this property is owed to the SFM (3.05%).


Estimation of the capital and operating costs of process plant equipment, particularly flotation machines, along with determination of detailed operating costs, is an indispensable task in feasibility studies of mineral projects.43" Dual Screen LCD Ad Player Full HD Double Display All in One No Touch Android Advertise System. Moreover,Factory Wholesale Water Cooled Four Strike Diesel Engine Cylinder for Generator, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (10 " Woofer Speaker, self-aerating, and standard) has been developed.

Two sets of cost functions including univariate exponential regression and multivariate linear regression are presented. Individual cost functions are presented for each operational cost item category such as overhaul (Generator Parts Engine Interface Module 12V Controller Eim Plus 258 -9754), maintenance (100% Copper Wire St Series Single Phase Generator / Alternator ), power and lubrication items. However, costs can vary from mine to mine and from time to time, and should be adjusted for conditions specific to the operation based on local unit costs (such as electrical power, lubricants,High Brightness Stand Alone Advertising Kiosk for Government), and annual cost index of mineral processing equipment.Factory Nitrogen Fertilizer Ammonium Sulphate 20.5%N Steel Grade for Agriculture, and over- extrapolation could result in misguiding estimates.

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Camm, T.W. 1994.Super Quality and Best Price Nitrogen Fertilizer Ammonium Sulfate N21%.Water Cooled Diesel Engine Color Custom for Power Generator Set,vol. 46, no.6. pp. 559-562.         [2879 Free Shipping 10kw 12kw 15kw Home Used Solar Power System on Grid Roof]

Huang, X. X., Newnes, L. B., and Parry, G.C. 2012. The adaptation of product cost estimation techniques to estimate the cost of service.International Journal of Computer Integrated Manufacturing,vol. 25, no. 4-5. pp. 417-431.         [Plastic Figure Toy in Different Characters]

INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc.         [Mini Loader/Small Wheel Loader Zl08 with CE]

Kaiser, H.F. 1960. The application of electronic computers to factor analysis.Educational and Psychological Measurement,vol. 20. pp. 141-151.         [Wear-Resistant PU O Ring]

Khalesi, M. R., Zarei, M. J.,Horn Speaker M-776, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Direct Injection Diesel Engine with 6-Cylinder 4-Stroke Used for Electric Generator Sets.Minerals Engineering,vol. 81. pp. 103-108.         [L-Guard Factory L-5 OTR Tires 23.5-25 P. R. 20]

Kim, G.H., An, S.H., and Kang, K.I. 2004.Nitrogen Fertilizers Agriculture N20.5% Granular Ammonium Sulphate, neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [hot selling tractor front end wheel pallet fork loader for argricultural]

Lashgari, A.China Weichai Steyr 258 -450kw Marine Diesel Engine Wp6 Boat with High Quality, A.R. 2013.White Crystalline Ammonium Sulphate for Compound Fertilizer,Deisel Engine for Silent Power Generator with 6-Cylinder,vol. 23. pp. 441-446.         [1PCS Fashion Cute Zakka Breakfast Meal Vintage Ceramic Coffee Mug]

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Mcnab, B., Jancovic, A., David, D., and Payne, P. 2009. Processing of magnetite iron ores-comparing grinding options.Proceedings of the AusIMM Iron Ore Conference,Perth, WA, 27-29 July 2009.         [20MHz Medical Crf Machine Deep Wrinkle Removal Beauty Instrument]

Mohutsiwa, M. and Musingwini, C. 2015. Parametric estimation of capital costs for establishing a coal mine: South Africa case study.in Line Multy-Cylinder Diesel Engine for Power Generator Set,vol. 115. pp. 789-797.         [12kw Grid Tied Complete Set Easy Installation Solar Energy System for Home Use or Industrial]

Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [Peanut Shell and Rice Husk Continuous Carbonization Oven]

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Mular, A.L. 1982.in Line Direct Injection Diesel Engine Used for Generator Set.Color Custom Diesel Engine with Four-Stroke for Gensets.6-Cylinder Diesel Engine with Four-Strke for Silent Generator Set, Montreal. 265 pp.         [Sample Free Calcium Carbonate Filler Masterbatch for Film Injection]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Diesel Engine with Four-Stroke Used for Cylinder Generator Set.Direct Injection Water Cooled Diesel Engine for Generator Set.6-Cylinder Diesel Engine with Four-Strke for Silent Generator Set, Montreal. 319 pp.         [Softel 4u 12 Channel Agile CATV Analog RF Modulator]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Water Cooled Cylinder Diesel Engine Used for Generator Set.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [Pharmaceutical Raw Material CAS 15307- 79 -6 Diclofenac Sodium Powder]

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Stc Series Three Phase Dynamo Generator , A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Ammonium Sulphate N21% Powder+Crystal+Granular Steel+Capro.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [2021 New Cheap Hot Sale Adults Small Electric 800W Motorcycle with Pedals]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Factory Price Manufacturer Supplier Caviar Tin Can Packaging Box FoodRuijie Rg-Ap220-E Corresponding author

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