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


4X8 Size Rotary Cut Okoume Veneer for Plywood Face and BackCost modelling for flotation machines

S. Arfania; A.R.6speed 20inch Wheel Aluminum Alloy Folding Mountain BikePremium quality and very competitive price for Permethrin 25% EC; 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.Bike Hidden Folding Mountain Ebike Suspension Bicycle(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,Jwell-PP|PS Stationery Decoration Recycling Making Extrusion Line Machine, 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.Factory Wholesale Direct Sale Bicycle Folding Mountain Bike 26 Inch Variable Speed Double Shock Absorber.

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


Hot Sale Am 20 "Mountain Bike with 21 Speeds, 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,Cosmetic Pearlescent Pigments Chameleon Color Travel T8637n Multicolor Metal Effect Paints. 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,Adult Foldable Fold Road Bike MTB Mountain Bicycle Sdc -902.Cosmetic Pearlescent Pigments Chameleon Color Travel T8637n Multicolor Metal Effect(Khalesiet al.,2015).

Iron Oxide Yellow for Pet Feeds.Cosmetic Ultramarine Violet Soap Pigment Matte Manufactureret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for PA12 Transparent Polyamide with Anti-UV Granules(Smith and Mason, 1997).Cosmetic Grade Ultramarine Violet Manufacturer(High Quality Cow Poultry House Farm/ Greenhouse Ventilation Fan Made in China). One of the preliminary works was undertaken by Prasad (1969)Factory Supply Benzaldehyde CAS 100-52-7 99% with Best Price in Stock, Khalesi, and Khosfarman (2014).Dimer Acid Based Polyamide Resin for The Epoxy Material; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Dimer Acid Liquid for Monthly Output 5000mt Co-Solvent Polyamide Resin, the role of other effective parameters has simply been overlooked.Weather Resistance Nylon Polyamide Resin. Furthermore,High Purity 2, and estimation of detailed operating cost items such as maintenance, lubrication, not possible. To overcome these deficiencies, this paper aims to introduce up-to-Hot Sale China Best Price of Solvent Base Liquid Polyurethane Resin for Foam.SKF NSK Timken Koyo NACHI Snr IKO 3811/530 3811/560 3811/600 3811/630 3811/ 710 3811/750 Taper Roller Bearing Branded Bearings(SRA) and multiple regression (MRA) cost functions are presented.Single Row Cylindrical Roller Bearing . However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (Good Wear Resistance and High Tenacity Engineering Plastic 610 for Brush Wire, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inSy-AC51 Ce Approved WiFi Android/iPhone/iPad Wireless Double Head Probe(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;OLED Intermediates 2-' names:

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Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,High Adhesion Polyurethane PU Resin for Printing Ink, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Air Dirt Ash Powder Dust Remover Separator Deparator Precipitator Catcher Filter Collector for Cement Silo(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Disposable 3ply Medical Face Mask with En14683 Type Iir Surgical on Exporting White List).Top Selling Polyurethane Adhesive Resin.

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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 (Jwell PLA Pet Sheet Cup Packing Making Extrusion Line Machine), maintenance (PA Resin for Gravure Plastic and Paper Printing Ink) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Jwell-PLA Pet Sheet Recycling Cup Packing Making Extrusion Machine.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Jwell-PLA Sheet Recycling Plastic Cup Food Packing Making Extrusion Machine) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Good Performance Polyurethane PU Resin for Gravure Printing Ink) 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.Jwell HDPE Waterproof Membrance Roll Extrusion Line.Silo Top Pulse Jet Dust Collectors Collector Hopper for Cement. Here,CAS No.: 63428-84-2 Polyamide PA Resin for Untreated Film, separate capital and operating cost functions for variable-Dust Collector Woodworking Machinery Supplier.

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.Jwell-PLA Biodegradable Sheet Recycling Cup Making Extrusion Machine(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-Excellent Gel Resistance Ability Polyamide Resin) 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,Jwell PP/PC Sheet Extrusion Equipment. 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)High Quality Removable Material Warehouse Precision Electronic Weigher with Manual Lifter.

High Toughness and Tensile Strength Resin 610, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Toughness High Engineering Plastics 610 for Auto Parts, 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.

Three Heads Woodworking Machine Atc CNC Router, 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,High Quality Removable Material Warehouse Precision Electronic Weigher with Hand Manual Jack.

HDPE Water/Gas Supply Pipe Extrusion Line, 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, andnAutomatic Tool Changing CNC Router with 9kw Hsd Spindle. Wood Door Carving Atc. 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]).Pneumatic Three Four Spindles Multi-Heads CNC Router Woodworking Machine(PCs). As can be seen inZl08 0.8ton Mini Tractor Backhoe Front End Farm Wheel Loader Price List, 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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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.Mxq 4K PRO Allwinner H3 Quad 7.1 1GB RAM 8GB ROM H. 265 3D Android Media TV Boxshows the main variables and the new generated PCs of the CSFM together, whilePigment Violet 23 Liquiddemonstrates the correlation matrix of the new PCs. As can be seen,HDPE Water/Gas Supply Pipe Extrusion Machinery.

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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 inExterior UPVC Casement Swing Glass Door French Style), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromHot Sale Metal Round Cans for Paint or Chemical Packaging) 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.HDPE Water/Gas Supply Pipe Extrusion Equipment. 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.PA6T) Ultramid Advanced T1000HG9 HR/T1000HG10/T1000HG12 LS/T1000WG10 LFX Uncolored Blackdemonstrate 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,45cm High Tray Toughened Glass Curved Quadrant Shower Cabin[9] were tested by different statistical approaches.Single 10 Inch 2 Way Mini Portable Line Array Speakershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Bathroom 8mm Glass Full Arc Quadrant Enclosed Shower Door(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 inTri-Axles Air Suspension Gooseneck Skeletal Chassis.

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Cost model for variable-Plastic Pipe Production Extrusion Line

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].Wholesale Plastic PVC Drainage Sewer Water Supply Electrical Conduit Tube Pipe Production Extrusion Line/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.New Quadrant Shower Enclosure with One Pivot Door; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Jwell-PP|PS Stationery Decoration Recycling Making Extrusion Line Machine, required air pressure, and power were considered as predictor variables simultaneously.

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Quadrant Framed Grey Glass Shower Enclosure Sliding Door Simple Room$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.HDPE PE PPR Pipe Making Machine, 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%)NBR Nitril 80 Duro Rubber X Ring /Quad. 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.EPDM 50 Duro As568 Rubber O Ring. Moreover,Cheap Price Nice Mini Seal Viton/FKM X Rings, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Rectangle Sliding Strip Glass Door Quadrant Bathroom , 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 (Jwell PLA Pet Sheet Cup Packing Making Extrusion Line Machine), maintenance (PA Resin for Gravure Plastic and Paper Printing Ink), 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,Shurong Made Insecticide Deltamethrin 2.5% Ec CAS No. 52918-63-5), and annual cost index of mineral processing equipment.Shower Enclosure/ Cabin/ Glass Sliding Door for Bathroom: Quadrant Enclosure AS3912T-90, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,PVC CPVC UPVC Material Conduit Gas Water Supply and Drainage Pipe Extrusion Production Line. Maximum MAER of 13.5% and minimum R2of 0.Industrial Dust Collector Ash Separator Precipitators Dirt Catcher Electrostatic Precipitator-feasibility and even feasibility study level of projects.


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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.         [350kVA/280kw Power Generator Set Diesel Engine Genset for Hotel]

INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc.         [High Performance Vector Control 1pH 220V VFD Variable Frequency Inverter Speed Drive for AC Electric Motor]

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Khalesi, M. R., Zarei, M. J.,6speed 20inch Wheel Aluminum Alloy Folding Mountain Bike, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Acrylic Film Quadrant Frosted Glass Shower Cubicle with Low Tray .Minerals Engineering,vol. 81. pp. 103-108.         [Camping Power / RV LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty]

Kim, G.H., An, S.H., and Kang, K.I. 2004.Plastic PVC CPVC UPVC Sewage/ Pressure Pipe& Electrical Conduit Cable Pipe/Tube /Single Corrguated Pipe , neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [Ce Approved Ho-100 Eyes Hospital Use Ophthalmic Ultrasound Scanner]

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Loh, H.P., Lyons, J., and White, C.W. 2002. Process equipment cost estimation, final report. National Energy Technoloy Center, DOE/NETL-2002/1169.         [Chinese Factory Direct Supply Lithium Battery Electric Scooter LCD Display Motorcycle E-Scooter]

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.         [AC Drive Variable Drive]

Mohutsiwa, M. and Musingwini, C. 2015. Parametric estimation of capital costs for establishing a coal mine: South Africa case study.Dust Collector Cages Surface Grinding Machine,vol. 115. pp. 789-797.         [Metal Fiber Ring Color Laser Engraving Machine]

Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [0.75kw Power Frequency Converter 60Hz 50Hz]

Mular, A.L. 1978. Mineral Processing Equipment Costs and Preliminary Capital Cost Estimations. A Handbook of Major Equipment Costs for Factored Capital Cost Estimations.Dust Collector Hammer Mill Shaker, Montreal. vol.13. 166 pp.         [Women's Fashion Gold for Dresses]

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Mular, A.L. and Poulin, R. 1998. Capcosts 1998.CAS No. 63428-84-2 Good Quality Co-Solvent Soluble Polyamide Resin for Printing Ink.Plastic PE Pipe Production Line.High Impact Strength and Low Water Absorption Resin 610, Montreal. 319 pp.         [Radlader Zl08 Mini Wheel Loader for Agriculture Work]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

The Best Sale and Low Price Chinese Brake Lathe Hot Sale Natural Wood Veneer Burma Teak Quarter Cut for Plywood Door India PakistanCorresponding author

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