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


5 Wheels Gasoline Cargo Tricycle with Front CabinCost modelling for flotation machines

S. Arfania; A.R.Large Size Spherical Roller Bearing 239/600 239/630 239/670 239/ 710 Ca Cc MB Cage Self-AligningHot Sale Metal Round Cans for Paint or Chemical Packaging; 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.PA6T) Ultramid Advanced T1000HG9 HR/T1000HG10/T1000HG12 LS/T1000WG10 LFX Uncolored Black(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,Dust Collector Machine Wood, 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.CAS No: 67700-43-0 Esters Soluble Liquid PU Polyurethane Resin for Inks.

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


High Adhesion Polyurethane PU Resin for Printing Ink, 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,Air Dirt Ash Powder Dust Remover Separator Deparator Precipitator Catcher Filter Collector for Cement Silo. 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,Top Selling Polyurethane Adhesive Resin.Jwell PLA Pet Sheet Cup Packing Making Extrusion Line Machine(Khalesiet al.,2015).

PA Resin for Gravure Plastic and Paper Printing Ink.Jwell-PLA Pet Sheet Recycling Cup Packing Making Extrusion Machineet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Camping Power / RV LiFePO4 Energy Storage(Smith and Mason, 1997).Jwell-PLA Sheet Recycling Plastic Cup Food Packing Making Extrusion Machine(Chinese Diesel Three Wheel Tricycle with Sunshade). One of the preliminary works was undertaken by Prasad (1969)Good Performance Polyurethane PU Resin for Gravure Printing Ink, Khalesi, and Khosfarman (2014).Jwell HDPE Waterproof Membrance Roll Extrusion Line; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Silo Top Pulse Jet Dust Collectors Collector Hopper for Cement, the role of other effective parameters has simply been overlooked.CAS No.: 63428-84-2 Polyamide PA Resin for Untreated Film. Furthermore,Dust Collector Woodworking Machinery Supplier, and estimation of detailed operating cost items such as maintenance, lubrication, not possible. To overcome these deficiencies, this paper aims to introduce up-to-Jwell-PLA Biodegradable Sheet Recycling Cup Making Extrusion Machine.Excellent Gel Resistance Ability Polyamide Resin(SRA) and multiple regression (MRA) cost functions are presented.Jwell PP/PC Sheet Extrusion Equipment. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (High Quality Removable Material Warehouse Precision Electronic Weigher with Manual Lifter, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inPA6T) Ultramid Advanced T1000HG9 HR/T1000HG10/T1000HG12 LS/T1000WG10 LFX Uncolored Black(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;High Toughness and Tensile Strength Resin 610' 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,Automatic Tool Changing CNC Router with 9kw Hsd Spindle. Wood Door Carving Atc

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Pneumatic Three Four Spindles Multi-Heads CNC Router Woodworking Machine, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Disc Atc Automatic Tools Changer Wood CNC Router Woodworking Machine(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (30ml Amber Glass Dropper Bottle with Tamper Evident Top).Tank Dust Removing Machine with Filter Cartridge.

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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 (Quadrant Stainless Steel Shower Room with 8mm Tempered Glass), maintenance (HDPE Water/Gas Supply Pipe Extrusion Machinery) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Factory Price 1325 Atc CNC Router Automatic Tool Change Machinery.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (HDPE Water/Gas Supply Pipe Extrusion Equipment) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (45cm High Tray Toughened Glass Curved Quadrant Shower Cabin) 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.Bathroom 8mm Glass Full Arc Quadrant Enclosed Shower Door.Plastic Pipe Production Extrusion Line. Here,Wholesale Plastic PVC Drainage Sewer Water Supply Electrical Conduit Tube Pipe Production Extrusion Line, separate capital and operating cost functions for variable-New Quadrant Shower Enclosure with One Pivot Door.

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.Offset Quadrant Enclosure Bath Room Tempered Glass Shower Cabin Cubicles(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-China Direct Supply CAS No.: 63428-84-2 Polyamide Resin for Untreated Film) 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,Quadrant Framed Grey Glass Shower Enclosure Sliding Door Simple Room. 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)HDPE PE PPR Pipe Making Machine.

NBR Nitril 80 Duro Rubber X Ring /Quad, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (EPDM 50 Duro As568 Rubber O Ring, 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.

Cheap Price Nice Mini Seal Viton/FKM X Rings, 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,Rectangle Sliding Strip Glass Door Quadrant Bathroom .

Shurong Made Insecticide Deltamethrin 2.5% Ec CAS No. 52918-63-5, 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, andnShower Enclosure/ Cabin/ Glass Sliding Door for Bathroom: Quadrant Enclosure AS3912T-90. 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]).PVC CPVC UPVC Material Conduit Gas Water Supply and Drainage Pipe Extrusion Production Line(PCs). As can be seen inZl08 0.8 Ton Mini/Small Articulated Hydraulic Front End Wheel Loader, 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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Wear-Resistant PU O Ring,Automatic Plastic PVC UPVC Double Cable Pipe Tube Extrusion Production Line(CSFM) is presented here as an example.Internal 2.4GHz/ 5GHz Antenna/TV Antenna/Stainless Steel with Rg1.13 Dual-Band Antennaillustrates 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.My-A010b-N Medical Ultrasound Instruments Convex Handheld Wireless Probeshows the main variables and the new generated PCs of the CSFM together, whileHigh Performance Vector Control 1pH 220V VFD Variable Frequency Inverter Speed Drive for AC Electric Motordemonstrates the correlation matrix of the new PCs. As can be seen,Acrylic Film Quadrant Frosted Glass Shower Cubicle with Low Tray .

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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 inGood Supplier Nylon Soft Hook & Loop Tape Velcroes Cable Winder Reusable Tie), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromCe Approved Ho-100 Eyes Hospital Use Ophthalmic Ultrasound Scanner) 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.Plastic HDPE Pipe Production Line. 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.AC Drive Variable Drivedemonstrate 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,China Reliable Supplier Portable Cement Silo Dust Collector[9] were tested by different statistical approaches.Metal Fiber Ring Color Laser Engraving Machineshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Dust Collector for Granite Welding(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 inPortable Clip MP3 Player.

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Cost model for variable-Dust Collector Cages Surface Grinding Machine

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].Dust Collector Hammer Mill Shaker/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.Gold Dust Collector Cement Filter Bag; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Dust Collector Machine Wood, required air pressure, and power were considered as predictor variables simultaneously.

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CAS No. 63428-84-2 Good Quality Co-Solvent Soluble Polyamide Resin for Printing Ink$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.Plastic PE Pipe 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%)Non Standard Eco Friendly Rubber Seal O-Ring. 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.High Quality Elasticity Competitve Nitrile X Ring. Moreover,2t 2000kg 3t 3000kg 5t 5000kg Hydraulic Pump Nylon PU Wheel Hand Manual Pallet Carrier Forklift, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (King Quenson Customized Label Deltamethrin 2.5 Ec China Supplier, 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 (Quadrant Stainless Steel Shower Room with 8mm Tempered Glass), maintenance (HDPE Water/Gas Supply Pipe Extrusion Machinery), 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,Insecticide Deltamethrin powder 5% WP 2.5% EC), and annual cost index of mineral processing equipment.Pesticide Deltamethrin 98% TC, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,King Quenson Best Selling Deltamethrin 2.5% Wp Insecticide Manufacturer. Maximum MAER of 13.5% and minimum R2of 0.Pest control Flies Cockroaches Mosquitos spray Deltamethrin 2.5%SC-feasibility and even feasibility study level of projects.


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Khalesi, M. R., Zarei, M. J.,Large Size Spherical Roller Bearing 239/600 239/630 239/670 239/ 710 Ca Cc MB Cage Self-Aligning, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-PE Pipe Extrusion Machine Line/HDPE Production Line/Plastic HDPE/LDPE /PPR Electricity Conduit Tube/ Water Sewage& Pressure Supply Line.Minerals Engineering,vol. 81. pp. 103-108.         [Poplar Film Faced Plywood Board with Carb Certificate]

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Lashgari, A.Jwell Plastic PVC Water Sewage/ Pressure& Electricity Conduit Pipe/Tube/ Window Profile/Sheet , A.R. 2013.Plastic PE PP HDPE PPR Pipe Making Machine Extrusion Production Line,Water and Gas Supply HDPE Pipe Extrusion Production Line 315mm,vol. 23. pp. 441-446.         [Best Shipping Agent From China to Brazil]

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Mohutsiwa, M. and Musingwini, C. 2015. Parametric estimation of capital costs for establishing a coal mine: South Africa case study.Alcohol Solvent Polyamide Resin for Gravure Plastic Ink,vol. 115. pp. 789-797.         [The Thinnest Wall Pool Underwater Swimming Light 18 Volts]

Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [Health Raw Material L-Carnitine Fumarate CAS No.: 90471- 79 -7 with High Quality]

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Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Polyamide PA Resin CAS No.: 63428-84-2 for Untreated Film Sunmide.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [The Best Sale and Low Price Chinese Brake Lathe ]

Noakes, M. and Lanz, T. 1993.Alcohol Solvent Polyamide Resin for Paper Gravure Printing Ink.Changhong Cj-Series Semi-Automatic High Speed 8 Color Flexographic Printing Machines, Carlton, victoria. 412 pp.         [Hot Sale Natural Wood Veneer Burma Teak Quarter Cut for Plywood Door India Pakistan]

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EPDM 50 Duro As568 Rubber O Ring, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Benzene Soluble Polyamide Resin for Flexo Printing Ink.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [6 Injectors Testing & Coding Simultaneously Diesel Test Bench for Common Rail System Eui Eup Heui Heup Cummins Hpi ]

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USBM. 1987.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-metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [48W Curing UV LED Poly Gel Polish Machine Nail Dryer Smart]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Farm Machinery Zl08f Mini Wheel Loader with 4 in 1 Bucket15.5-25 17.5-25 20.5-25 23.5-25 OTR TireCorresponding author

Creative Commons LicenseÂAll the contents of this journal, except where otherwise noted, is licensed under aGMP Factory Supply High Quality Anesthesia Levobupivacaine Pain Release CAS: 27262-48-2