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



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S. Arfania; A.R.Medrogestone Top Quality Low Price 977- 79 -75 Liter Tinplate Metal Packing Car Paint Container Engine Oil Tin Can; 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.Factory Supply High Quality Ademetionine 1(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,China Supplier 1, 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.Cosmetic Grade CAS 79 -14-1 Glycolic Acid Powder.

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


CAS: 79 -44-7 Dimethylcarbamoyl Chloride , 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,Diesel Engine Eim630-465 12V Eim630-466 24V 258 -9755 PCB650-091 650-092 Generator PCB Controller Panel Circuit Board Interface Module Speed. 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,Kinetin; CAS No: 525- 79 -1; 6-Furfurylaminopurine; 6-Kt.Good Quality CAS: 97240- 79 -4 Topiramate Powder Price(Khalesiet al.,2015).

High Purity 99% Intermediate 1.Yinherb Supply Pharmaceutical Raw Materials CAS 977- 79 -7 Medrogestone Powderet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Chemical Reagent Bloom Tech 3-Dimethylaminophenylboronic Acid CAS 178752- 79 -9(Smith and Mason, 1997).High Quality Tretinoin with Good Price (High-Performance Three Phase Frequency Converter 380V 50/60Hz). One of the preliminary works was undertaken by Prasad (1969)Cosmetic Raw Material CAS 20449- 79 -0 Extract Powder Bee Venom Melittin, Khalesi, and Khosfarman (2014).Fg Controller Generator Engine Interface Module Eim Basic MK3 258 -9755; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,High Purity Organic Intermediate  1, the role of other effective parameters has simply been overlooked.Generator Interface Module Eim Basic 258 -9753 for Fg Wilson Engine. Furthermore,Wilson Parts Eim Module Engine Interface 258 -9753 2589755 Control, 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-Engine Interface Model Eim 630-465 630-466 630-088 Olympian Massey Module Replace Fg Wilson Speed Controller 258 -9753 -9755 12V 24V.Diesel Engine Set Wilson Parts Eim Module Interface C3.3 C4.4 Motorcycle Generator Auto Spare 258 -9753 -9755 12V 24V(SRA) and multiple regression (MRA) cost functions are presented.5kw 10kw Stc Three Phase AC Synchronous 15kw Brush Alternator. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (Replace Fg Wilson Engine Interface Module Eim Plus Basic 258 -9755 -9753, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in2-Phenylbenzimidazole Sulfonic Acid for Exogenous Biological Compounds(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Engine Controller Model Eim Basic 258 -9756' 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,100% Copper Wire Stc Series Three Phase AC Dynamo/Generator /  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,Stc-3 3kw Stc-5 5kw Stc-10 10kw Three Phase Alternator, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),24kVA St Series Single Phase Generator (CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (6207 C2 -O&Kai Z1V1 Z2V2 Z3V3 SKF NSK NTN NACHI Koyo Timken Deep Groove Ball Bearing).20 Days Delivery! 100% Copper Wire Stc-3kw Three Phase Alternator.

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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 (20kVA St Series Single Phase Generator ), maintenance (PA Audio Sound System Line Array Speaker 10 Inch Neodymium Woofer with Wooden Box.) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,7.5kVA St Series Single Phase Generator .076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Wholesale 8inch 10inch 12 Inch 15inch DJ Speakers Professional Stage Audio) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (2 Way Passive 10 " Professional PRO Audio PA Line Array) 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.Stc Series Three Phase Dynamo Generator .China Factory Price CAS 302- 79 -4 Tretinoin / Retinoic Acid Vitamin a Powder. Here,Stc Series Three Phase Dynamo Generator , separate capital and operating cost functions for variable-CAS: 74- 79 -3 Amino Acid L-Arginine.

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.Glycolic Acid Cosmetic Grade CAS 79 -14-1 /a-Hydroxyacetic(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-St-10kw/kVA Single Phase Brush Type Electric Generator) 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,Stc-50kw/62.5kVA Three Phase AC Brush Alternator for Diesel Generator. 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)Veterinary Use Bulk Pirce of Oxytetracycline CAS: 79 -57-2.

100% Copper Wire St-7.5kw Single Phase Alternator Factory Price, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (100% Copper Wire St-5kw Single Phase Brush 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.

Home Theater Speaker, 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,Dual 6" Coaxial Full Range Speaker for Entertainment Room.

12inch Stage Monitor Speaker, 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, andnKTV Single 8" Full Range Audio&Sets. 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]).St-2kw 230V/50Hz Single Phase Brush Alternator for Sale(PCs). As can be seen inCAS No. 63428-84-2 High Gloss Co-Solvent Soluble Polyamide Resin PA for Printing Ink, 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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St 5kw Single Phase AC Electric Alternator Generator,Wilson Parts Eim Module Engine Interface 258 -9753 2589755 Control(CSFM) is presented here as an example.Yangtze Solar Power Grid Tied System Home 5kw 5Killustrates 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.Food Grade Lactic Acid 79 -33-4shows the main variables and the new generated PCs of the CSFM together, whileFruit and Vegetables Packaging Materials Vacuum Nylon Bagdemonstrates the correlation matrix of the new PCs. As can be seen,258 -9754 Electric Engine Interface Moudle 12V Eim Basic.

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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 inResin Crafts), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromDetergent Grade Sodium Tripolyphosphate 94% CAS No: 7758- 79 -4) 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.Android Digital Signage Intelligent Hand Sanitizer Display. 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.Jwell - TPU Roll Car Paint Protection Matt Cast Film Machinedemonstrate 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,55 Inch Outdoor Double-Side LCD Display Self Service Airport Kiosk Touch Screen Multimedia Information[9] were tested by different statistical approaches.Hot Sale Factory Direct Cheap New Model Electric Bicycle Convenient Motorcycle Best Price in CKD forshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.New Brand Diesel Engine with Four Stroke Multy-Cylinder Used for Generator Set(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 inImitation Fashion Jewellery 925 Sterling Silver or Brass Cubic Zirconia Bracelets for Girls.

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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].43" Dual Screen LCD Ad Player Full HD Double Display All in One No Touch Android Advertise System/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.Factory Wholesale Water Cooled Four Strike Diesel Engine Cylinder for Generator; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,China Supplier 1, required air pressure, and power were considered as predictor variables simultaneously.

10 " Woofer Speaker. Moreover, the operating cost was detailed in different cost items.High Brightness Stand Alone Advertising Kiosk for Government, indicated inChina Manufacturer 5000W Grid Tied Home Solar Energy System Low Cost, and major extrapolation should be avoided.

Factory Nitrogen Fertilizer Ammonium Sulphate 20.5%N Steel Grade for Agriculture$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.High Speed 258kw 6 Cylinder Industrial Diesel Engine for Electric, 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%)21% Fertilizer Ammonium Sulphate Caprolactam Grade Crystalline. 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.Super Quality and Best Price Nitrogen Fertilizer Ammonium Sulfate N21%. Moreover,Water Cooled Diesel Engine Color Custom for Power Generator Set, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Direct Injection Diesel Engine with 6-Cylinder 4-Stroke Used for Electric Generator Sets, 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 (20kVA St Series Single Phase Generator ), maintenance (PA Audio Sound System Line Array Speaker 10 Inch Neodymium Woofer with Wooden Box.), 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,Nitrogen Fertilizers Agriculture N20.5% Granular Ammonium Sulphate), and annual cost index of mineral processing equipment.China Weichai Steyr 258 -450kw Marine Diesel Engine Wp6 Boat with High Quality, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,White Crystalline Ammonium Sulphate for Compound Fertilizer. Maximum MAER of 13.5% and minimum R2of 0.Deisel Engine for Silent Power Generator with 6-Cylinder-feasibility and even feasibility study level of projects.


Camm, T.W. 1994.in Line Multy-Cylinder Diesel Engine for Power Generator Set.6-Cylinder Diesel Engine Water Coolant for Electric Generator Set,vol. 46, no.6. pp. 559-562.         [Deisel Engine for Silent Power Generator with 6-Cylinder]

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.         [Customized Size Luxury Waterproof Carrara White Kitchen Solid Surface Marble Countertop]

INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc.         [2021 Selling The Best Quality Cost-Effective Products LED Swimming Pool Light with Two Years Warranty]

Kaiser, H.F. 1960. The application of electronic computers to factor analysis.Educational and Psychological Measurement,vol. 20. pp. 141-151.         [Gt1541V 704765-0003/708450-0018 Turbine Wheel Shaft for 700960-0011]

Khalesi, M. R., Zarei, M. J.,Medrogestone Top Quality Low Price 977- 79 -7, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-in Line Direct Injection Diesel Engine Used for Generator Set.Minerals Engineering,vol. 81. pp. 103-108.         [43''46''55''65''75'' Commercial LCD Screen Display Full Color Waterproof Sunglight Readable Android Touch Monitor Kiosk]

Kim, G.H., An, S.H., and Kang, K.I. 2004.Color Custom Diesel Engine with Four-Stroke for Gensets, neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [Professional Powered Line Array Selfpowered Speakers Active System]

Lashgari, A.6-Cylinder Diesel Engine with Four-Strke for Silent Generator Set, A.R. 2013.Diesel Engine with Four-Stroke Used for Cylinder Generator Set,Direct Injection Water Cooled Diesel Engine for Generator Set,vol. 23. pp. 441-446.         [Sale in Sri Lanka 24X24 Gray Porcelain Floor Tile]

Loh, H.P., Lyons, J., and White, C.W. 2002. Process equipment cost estimation, final report. National Energy Technoloy Center, DOE/NETL-2002/1169.         [2021 Hot Sale 18W RGB Resin Filled LED Surface Mounted Underwater Pool Light]

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.         [Seal Kits Hyundai R210-7 Boom Cyl Arm Bucketcyl Oil]

Mohutsiwa, M. and Musingwini, C. 2015. Parametric estimation of capital costs for establishing a coal mine: South Africa case study.Water Cooled Cylinder Diesel Engine Used for Generator Set,vol. 115. pp. 789-797.         [Square Tin Paint Packaging Can Lubricant Oil Containers]

Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [Adult 800W Power Electric Scooter Suit for Woman]

Mular, A.L. 1978. Mineral Processing Equipment Costs and Preliminary Capital Cost Estimations. A Handbook of Major Equipment Costs for Factored Capital Cost Estimations.Nitrogen 21% Granular Fertilizer Ammonium Sulphate, Montreal. vol.13. 166 pp.         [One Person Soaking Bathtub for Denmark Markets]

Mular, A.L. 1982.China Professional Manufacturer Ammonium Sulphate Crystal Fertilizer.Best Price Fertilizer Ammonium Sulphate N21% Min.Nitrogen Fertilizer N21% Min Ammonium Sulphate White Granular, Montreal. 265 pp.         [10 Inch Sound System Speaker Box China Line Array Audio Systems]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Wholesale Ammonium Sulphate with SGS and Coa Certificate.Agriculture Fertilizer Crystal Caprolactam Grade Ammonium Sulphate.Nitrogen Fertilizer N21% Min Ammonium Sulphate White Granular, Montreal. 319 pp.         [Transparent Ceramics Hot Press Sintering Furnace]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Color Custom Diesel Engine Used for Generator Set with Four-Stroke.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [Line Array Speaker PRO Audio System 10'' Neodymium Loudspeaker]

Noakes, M. and Lanz, T. 1993.Ammonium Sulphate N21% Powder+Crystal+Granular Steel+Capro.Factory Price Ammonium Sulfate for Crystal Compound Fertilizer, Carlton, victoria. 412 pp.         [Electric Motorcycle Fashion Design 800W with Removable Battery]

O'hara, T.A. 1980. Quick guide to the evaluation of ore bodies,CIM Bulletin,February. pp. 87-89.         [Hot Sale Inner Handle Color Spoon Sublimation Ceramic Mug]

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100% Copper Wire St-5kw Single Phase Brush Generator, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Direct Injection Water Cooled Diesel Engine Used for Generator Set.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Chinese Supplier of Variable Frequency Drive/AC/DC Motor Speed Controller]

100% Copper Wire St-5kw Single Phase Brush Generator, Ar., Lashgari, A., Fouladgar, M.M., and Skibniewski, M.J. 2012. Estimating capital and operational costs of backhoe shovels.Journal of Civil Engineering and Management,vol. 18, no. 3. pp 378-385.         [100ml 30ml 50ml White Color as Plastic Airless Acrylic Bottle for Cosmetics Packaging]

100% Copper Wire St-5kw Single Phase Brush Generator, A.R., Khalesi, M.R., and Khosfarman, M. 2014. A parametric cost model for mineral grinding mills.Minerals Engineering,vol. 55. pp. 96-102.         [Dexketoprofen Trometamol Manufacturer CAS 156604- 79 -4 with Purity 99%]

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USBM. 1987.Waterproof Floor Standing Alone Outdoor Digital Signage,Color Custom Direct Injection Diesel Engine Used for Generator Set-metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [2000W/3000W Pipes Plates Fiber Laser Cutting Machine]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Everun CE Approved Articulated Er08 0.8 Ton Multifunction Front End Loader with Standard BucketFood Additive Granular Dihydrate Disodium PhosphateCorresponding author

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