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



Hot Selling High Quality CAS. 56-95-1 Chlorhexidine AcetateCost modelling for flotation machines

S. Arfania; A.R.Wear-Resistant PU O RingThe Thinnest Wall Pool Underwater Swimming Light 18 Volts; 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.Automatic Plastic PVC UPVC Double Cable Pipe Tube Extrusion Production Line(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,Acrylic Film Quadrant Frosted Glass Shower Cubicle with Low Tray , 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.Plastic PVC CPVC UPVC Sewage/ Pressure Pipe& Electrical Conduit Cable Pipe/Tube /Single Corrguated Pipe .

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


Plastic HDPE Pipe Production Line, 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,China Reliable Supplier Portable Cement Silo Dust Collector. 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,Dust Collector for Granite Welding.Dust Collector Cages Surface Grinding Machine(Khalesiet al.,2015).

Dust Collector Hammer Mill Shaker.Gold Dust Collector Cement Filter Baget al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 500kw Solar Energy System Grid Tied 500kwatt Panel Station(Smith and Mason, 1997).Low Water Absorption Polymer 610(Health Raw Material L-Carnitine Fumarate CAS No.: 90471- 79 -7 with High Quality). One of the preliminary works was undertaken by Prasad (1969)High Impact Strength and Low Water Absorption Resin 610, Khalesi, and Khosfarman (2014).CAS No. 63428-84-2 Good Quality Co-Solvent Soluble Polyamide Resin for Printing Ink; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Plastic PE Pipe Production Line, the role of other effective parameters has simply been overlooked.Non Standard Eco Friendly Rubber Seal O-Ring. Furthermore,High Quality Elasticity Competitve Nitrile X Ring, 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-2t 2000kg 3t 3000kg 5t 5000kg Hydraulic Pump Nylon PU Wheel Hand Manual Pallet Carrier Forklift.King Quenson Customized Label Deltamethrin 2.5 Ec China Supplier(SRA) and multiple regression (MRA) cost functions are presented.Insecticide Deltamethrin powder 5% WP 2.5% EC. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (Pesticide Deltamethrin 98% TC, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inBrown Black Opaque Chemical Industrial Container 100ml Flip Top Cap Bottle(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;King Quenson Best Selling Deltamethrin 2.5% Wp Insecticide Manufacturer' names:

Pest control Flies Cockroaches Mosquitos spray Deltamethrin 2.5%SC: based on 36-foot,Shower Enclosure/ Cabin/ Glass Sliding Door for Bathroom: Quadrant Cabin AS-2800,Plastic PVC/CPVC Electricity Conduit Tube/ Water Sewage Pressure Pipe/Gas Hose/ Profile/Sheet Extrusion &Extruding Production Line Price,PE Pipe Extrusion Machine Line/HDPE Production Line/Plastic HDPE/LDPE /PPR Electricity Conduit Tube/ Water Sewage& Pressure Supply Line, and level control

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,Water/Gas-Supply PP PE HDPE Plastic Pipe/Tube Extrusion Making Machine

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Jwell Plastic PVC Water Sewage/ Pressure& Electricity Conduit Pipe/Tube/ Window Profile/Sheet , blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Plastic PE PP HDPE PPR Pipe Making Machine Extrusion Production Line(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Wholesale Disposable Medical Supplies Surgical 3ply Protective Face Dust Masks on White List for Hospital Tie Mask Doctor Use).Water and Gas Supply HDPE Pipe Extrusion Production Line 315mm.

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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 (Alcohol Solvent Polyamide Resin for Gravure Plastic Ink), maintenance (Polyamide 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,Good Solution Polyamide Resin PA for Untreated Film Sunmide.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Easy Operating Manual Hand Pallet Truck Forklift Scale) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Co-Solvent Polyamide Resin for Untreated Film 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.20 mm 20mm PVC Pipe Machine.CAS No.: 63428-84-2 Polyamide Resin. Here,Polyamide PA Resin CAS No.: 63428-84-2 for Untreated Film Sunmide, separate capital and operating cost functions for variable-Alcohol Solvent Polyamide Resin for Paper Gravure Printing Ink.

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.Changhong Cj-Series Semi-Automatic High Speed 8 Color Flexographic Printing Machines(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-Hot Sale Popular Use Insecticide Deltamethrin 2.5 Sc for Crop Health) 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,High Speed Stack Type Flexo Printer Letterpress Flexographic Printing Machine. 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)Small Cheap Quadrant Simple Fiberglass Hinge Shower Enclosure .

Benzene Soluble CAS No.: 63428-84-2 Polyamide PA Resin for Untreated PE/PP, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (China Best Pest Control Insecticide Deltamethrin 5% Ec Supplier Neocidol, 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.

Benzene Soluble Polyamide Resin for Flexo Printing Ink, 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,Premium quality and very competitive price for Permethrin 25% EC.

PVC Pipe Extrusion Machine Line/UPVC Production Line/Plastic PVC/UPVC/CPVC Electricity Conduit Tube/ Water Sewage& Pressure Supply 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, andnHigh Quality Removable Material Warehouse Precision Electronic Weighing Scale with Manual Hand Telehandler. 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]).Permethrin 25% EC Pesticide & Insecticides(PCs). As can be seen inThe Best Sale and Low Price Chinese Brake Lathe , 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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HD250-5/7 Arm Boom Bucket Cylinder Seal Cyl for Kato,Ergonomic Design AC 3000kg Trolley Hydraulic Hand Pallet Truck(CSFM) is presented here as an example.AC Three Phase Output Drive Frequency Converter Speed Control Electric Motorillustrates 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.350-1000W Pedal Assist Electric Scooter Parts 10 Inch Mobility Tricycles Motorcycles Chinese for Adultsshows the main variables and the new generated PCs of the CSFM together, whileHigh Purity New BMK Powder with Low Price in Stock CAS: 16648-44-5demonstrates the correlation matrix of the new PCs. As can be seen,PVC Garden Pipe Making Machine Cost.

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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 inNaropin Anesthesia Injection Ropivacaine Pure Powder 132112-35-7 USA Safe Delivery 7days), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromPortable Handheld Metal Plastic DOT Peen Marking Machine) 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.PU Wheel 2000kg Hand Pallet Truck with Digital Weighing Scale. 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.PRO Audio Dual 10 " 900W Sound System Perfect Line Array Active 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,Excellent Quality CAS No.: 63428-84-2 Polyamide PA Resin for Untreated Film Sunmide[9] were tested by different statistical approaches.Factory Direct Supply High Speed Electric Motorcycle Throttle Control Bikeshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.PVC Pipe Making Machine Alibaba(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 inProtective Hand Sanitizer with Ce for EU Standard Alcohol  Hand.

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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].2000kg Mini Cheap Price Nylon Wheel Hand Hydraulic Pallet Truck/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.Direct Sale Polyamide PA Resin for Ink; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Acrylic Film Quadrant Frosted Glass Shower Cubicle with Low Tray , required air pressure, and power were considered as predictor variables simultaneously.

CAS No. 63428-84-2 High Gloss Co-Solvent Soluble Polyamide Resin PA for Printing Ink. Moreover, the operating cost was detailed in different cost items.Plastic PVC|PE|PP|PPR|Agriculture Water|Gas|Irrigation Pipe|Faux Marble Sheet|Foam Board Floor|Roofing Tile|Extruder|Extrusion Making Machine Production Line, indicated inGMP Factory Supply High Quality Anesthesia Levobupivacaine Pain Release CAS: 27262-48-2, and major extrapolation should be avoided.

Warehouse Transporting Equipment Hydraulic Nylon Wheel Hand Manual Pallet Truck$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.Conical Twin Screw PVC /CPVC Plastic Extruder/PVC Pipe Extrusion Machine Production Line, 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%)PVC Vacuum Calibrated Tank 160mm. 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.Material Handling Equipment Manual Hand Pallet Jack. Moreover,Excellent Quality Hydraulic Arm Cyl Seal for E307D Excavator, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Factory Manufacture E307D Bucket Cyl Kit Seal, 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 (Alcohol Solvent Polyamide Resin for Gravure Plastic Ink), maintenance (Polyamide 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,Excavator Cylinder Seal for E307b Boom Cyl Repair Parts), and annual cost index of mineral processing equipment.Arm Cyl Oil Seal Kits for Sumitomo, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,Komatsu PC270-7 Arm Cyl Ket. Maximum MAER of 13.5% and minimum R2of 0.Deltamethrin 2.5% EC Pesticide & Insecticides-feasibility and even feasibility study level of projects.


Camm, T.W. 1994.Manufacture! OEM Komatsu PC50uu-2 Bucket Cyl Seal Ket.16 Years Agrochemical Manufacturer Pest Control Deltamethrin Low Price,vol. 46, no.6. pp. 559-562.         [Karaoke Microphone Bluetooth Sound Mixer Video Conference]

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.         [Compostable High Quality Moisture-Proof Courier Shipping Package Bags for Clothing]

INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc.         [2021 New Design Wall Mounted Underwater 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.         [Low Failure Rate High Efficiency Induction Metal Heating Machine ]

Khalesi, M. R., Zarei, M. J.,Wear-Resistant PU O Ring, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Deltamethrin 98% Tc Insecticide 2.5 Sc Wholesale 2021.Minerals Engineering,vol. 81. pp. 103-108.         [Gamma-Aminobutyric Acid GABA CAS: 56-12-2 with Best Price]

Kim, G.H., An, S.H., and Kang, K.I. 2004.Top Quality Insecticide Classification Deltamethrin 98%TC, neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [20W Fiber Laser Color Marking Machine for Colorful on Stainless Steel]

Lashgari, A.Highly Effective Deltamethrin , A.R. 2013.Chrome Quadrant Shower Enclosure with Plastic Double Roller,Frame Quadrant Glass Curved Shower Cubicle for Sale Price,vol. 23. pp. 441-446.         [T6 Series Nesting 55inch SKD&CKD Multi-Screen Interaction 4K Interactive Whiteboard with Touch Screen Dual System]

Loh, H.P., Lyons, J., and White, C.W. 2002. Process equipment cost estimation, final report. National Energy Technoloy Center, DOE/NETL-2002/1169.         [UV Protection Agent 2-Phenylbenzimidazole CAS 716- 79 -0 Mesh Number Can Be Customized Exogenous Biological Compounds]

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.         [15kw Grid Tied Solar System]

Mohutsiwa, M. and Musingwini, C. 2015. Parametric estimation of capital costs for establishing a coal mine: South Africa case study.Quadrant Stainless Steel Corner Shower Enclosure for Hotel with Customized Size and Color,vol. 115. pp. 789-797.         [Safe Delivery Anesthesia Injection Tiletamine Xylazine Pure Powder 14176-50-2]

Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [P-Toluenesulfinic Acid Sodium Salt Hydrate ]

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Mular, A.L. 1982.Imiprothrin 93%TC.Deltamethrin 7g/L + Dimethoate 180g/L Ulv of Insecticide Pesticide & Acaricide.Deltamethrin 2.5% Wp of Insecticide Pesticide, Montreal. 265 pp.         [Yn725 Yineng Mini Wheel Loader 18.5kw Cabin]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Insecticide Deltamethrin 2.5% Ec.PVC 16-32mm Four Pipes Extrusion Line.Deltamethrin 2.5% Wp of Insecticide Pesticide, Montreal. 319 pp.         [High Quality 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool with Two Years Warranty]

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Noakes, M. and Lanz, T. 1993.Komatsu Boom Cyl Ket for PC300-5.PPR Pipe/HDPE Pipe/PVC Pipe /UPVC Machine Manufacturer Factory, Carlton, victoria. 412 pp.         [Act MP 48 ECU Switch/Act 2568d Switch]

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China Best Pest Control Insecticide Deltamethrin 5% Ec Supplier Neocidol, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Aftermarket Hdy. Cyl Repair Kits for Cat Diggers/0965606.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Manufacturer 3kwh Long Life Solar Home System with LiFePO4 Battery]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Bloom Tech Chemical Material Topiramate CAS 97240- 79 -499% Tech Grade Disodium Phosphaten Used as Water-Softening AgentCorresponding author

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