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


Automatic Tool Changing CNC Router with 9kw Hsd Spindle. Wood Door Carving AtcCost modelling for flotation machines

S. Arfania; A.R.Hospital Equipment Portable Ultrasound Bone Densitometer at Best Price5kw Grid Tied Solar Inverter Three Phase for Home Use; 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.Ce Approved Ho-100 Eyes Hospital Use Ophthalmic Ultrasound Scanner(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,Outdoor/Home Use Built-in LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty, 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.Low Failure Rate High Efficiency Induction Metal Heating Machine .

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


Portable Ultrasonic Ophthalmology Ophthalmic a/B Scan, 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,Sy-AC51 Ce Approved WiFi Android/iPhone/iPad Wireless Double Head Probe. 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,Camping Power / RV LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty.Hot Sale Mini High Frequency 25kw Induction Heater Price(Khalesiet al.,2015).

Convex Series Probe Type Wireless Mini Ultrasound Scanner.2ND Generation Ultrasound Bone Densitometeret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Square Tin with Airtight Lever Lid for Tea(Smith and Mason, 1997).Hot Selling 2ND Generation Ultrasound Bone Densitometer(2872 High Efficiency Home Solar Modules 30kw 50kw Power on Grid Photovoltaic System). One of the preliminary works was undertaken by Prasad (1969)Real Mink 3D 5D New Fashion Fast Shipping High Quality Best Seller Eyelash, Khalesi, and Khosfarman (2014).High Quality Economic Ultrasound a/B Scan for Ophthalmology ; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Ut-O500 Diagnosis System Portable Full Digital Ophthalmic Ultrasound a/B Scan for Eye, the role of other effective parameters has simply been overlooked.Ophthalmic a Scan and Pachymeter Combined Unit. Furthermore,Ophthalmic Optical Pachymeter & Biometer / a Scan , and estimation of detailed operating cost items such as maintenance, lubrication, not possible. To overcome these deficiencies, this paper aims to introduce up-to-1000MHz FTTH Trunk Line CATV Mini 2 Ports Signal Amplifier.Roadside Emergency Set Auto Car Tool Kit(SRA) and multiple regression (MRA) cost functions are presented.SA831r Outdoor Return Path CATV Trunk Amplifier. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (2200 Degree Vacuum Hot Pressing Furnace High-Temperature for Cim, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inHandheld Small Portable Digital High Frequency Induction Brazing Machine with Soft Cable(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Portable Induction Heater for Crystal Growth' 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,Softel 4u 12 Channel Agile CATV Analog RF Modulator

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Maintence Grease Gun 21V LCD Real Time Information Reading Hand Tool, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Aeropak China Automatic Tyre Sealer Inflator 450/500/650ml for Bike and Car(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Commercial Indoor Cycling Sports Static Bicycle Exercise Spinning Bike Seat Adjustable Gym Equipment).High Quality Melamine MDF with Competitive Price Ce Carb Grade.


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 (Glue E1 Fsc Carb Green/Red Core Plain Mositure-Proof MDF), maintenance (The Best Sale and Low Price Chinese Brake Lathe ) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Melamine MDF E1 E0 Carb P2 Grade.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Transparent Ceramics Hot Press Sintering Furnace) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (6mm Raw Plain MDF ISO9001/ Carb for Decoration) 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.ISO.Se0/Fsc/ Carb Naf 18mm MDF Board. Here,HPM410W Submerged Integrated Level Sensor Transmitter, separate capital and operating cost functions for variable-Industrial Mining All Welded Anti Explosion Pressure Transmitter.

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.GAS Wind Pressure Transmitter with Data Display(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-Carb /SGS Wood Fiber New Design 1220*2440mm Melamine MDF) 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,Coconut Shell Carbon Charcoal Making Machines Production Line. 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)2440mmx1220mmx3mm Carb P2 Formaldehyde Raw HDF Board.

Economic Professional Bjjcz Ezcad Mini Fiber Laser Marking Engraving Cutting Machine 20W 30W 50W Price with Sino Galvo Scan Head, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Light Color Plain MDF Boardlight Board/Raw MDF/E2/E1/E0/ Carb P2 /Raw, 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.

Glue E1 Carb Plain Mositure-Proof MDF, 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,Melamine MDF 2440mmx1220mmx3.0mm with Carb P2 Certification.

Draught Fan Digital LED Micro Air Wind Pressure Sensor, 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, andnHPM128 High stability Explosion-proof Pressure Transmitte. 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]).Compressor Low Cost Small Type Pressure Transducer(PCs). As can be seen inMini Radlader with Ce for Germany and Sweden Market, 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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HPM766 Dry diaphragm membrane sanitary pressure transducer,150cc Gy6 Engine Gasoline Scooter(CSFM) is presented here as an example.Hot Sale Hy-688 Polyamide Resinillustrates 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.Gy6 150cc Gasoline Scootershows the main variables and the new generated PCs of the CSFM together, whileManufacturer Supply Bdo Novel Intermediate 1demonstrates the correlation matrix of the new PCs. As can be seen,Gy6 Engine 150cc Scooter.

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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 inSoya Tacos Food Processing Line), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromHaiqin Brand 0.8ton Mini Loader ) 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.Digital Display Superior 316L integrated Pressure Transducer. 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.Electricity Saver Device demonstrate 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,High Lumen Resin Filled RGB PAR56 DC12V Flat LED Wall Mounted Waterproof Pool Lamp[9] were tested by different statistical approaches.PA System LED Light Trolley Tws Woofer Speaker Party Audioshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.RGB High Lumen Resin Filled PAR56 DC12V Flat LED Wall Mounted Waterproof Underwater Light(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 in97 Polyester 3 Spandex Fabric Shiny Poly Single Faced Jersey Fashion Clothes.

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Cost model for variable-Gy6 125cc Sproty Scooter /Motorcycle

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].Top Grade Cross-Country Motorcycle Tire 120/90-18/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.Gy6 Engine 150cc Gasoline Scooter for Adults; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Outdoor/Home Use Built-in LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty, required air pressure, and power were considered as predictor variables simultaneously.

Flat film Clamp Hygienic Pressure Sensor Transmitter. Moreover, the operating cost was detailed in different cost items.Steel Wheel Hub Buggy 150cc ATV, indicated inDl-Isoleucine Powder CAS Number 443- 79 -8, and major extrapolation should be avoided.

150cc 200cc Gas ATV Quad for Adults$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.Hot Selling to Nigeria Market Manufacture Motorbike Tyre 3.50-18, 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%)Raw Petro High Temperature Sapphire Pressure Transmitter. 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.Cheap Adult 150cc ATV Farm/Quad Bike 200cc for Sale. Moreover,EEC Euro 5 Gy6 -125cc Motorcycle Scooters, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Gy6 Engine Gas Scooter, 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 (Glue E1 Fsc Carb Green/Red Core Plain Mositure-Proof MDF), maintenance (The Best Sale and Low Price Chinese Brake Lathe ), 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,150cc 200cc Gy6 4 Wheel Chain/Shaft Drive Gas Powered Sport Quad Bike ATV), and annual cost index of mineral processing equipment.Gy6 -50cc OEM Gas Scooter, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,150cc off Road Utility ATV with Reverse . Maximum MAER of 13.5% and minimum R2of 0.Commander 200cc ATV off-Road Quad China 150cc 180cc 110cc Kids-feasibility and even feasibility study level of projects.


Camm, T.W. 1994.Gy6 150cc Gasoline Scooter.Zongshen 150cc Cargo Tricycle with Top Cover,vol. 46, no.6. pp. 559-562.         [Bluetooth Speaker WiFi RGB+WY LED Ceiling Lamp]

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.         [Cee/IEC 63A 4p 400V Industrial Panel Mounted Socket]

INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc.         [Convex Series Probe Type Wireless Mini Ultrasound Scanner]

Kaiser, H.F. 1960. The application of electronic computers to factor analysis.Educational and Psychological Measurement,vol. 20. pp. 141-151.         [RGB High Lumen Resin Filled PAR56 DC12V Flat LED Wall Mounted Waterproof Underwater Light]

Khalesi, M. R., Zarei, M. J.,Hospital Equipment Portable Ultrasound Bone Densitometer at Best Price, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Gy6 150cc Gas Scooter.Minerals Engineering,vol. 81. pp. 103-108.         [4inch Outdoor Use Full Range for Public System Wall-Mounted Speaker]

Kim, G.H., An, S.H., and Kang, K.I. 2004.150cc 5 Speeds Forwader ATV 4 Wheelers Farm , neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [458 Alicosolar High Efficiency 10kw on Grid Solar System Kit Home with CE/TUV/ISO for Use]

Lashgari, A.150cc Gy6 Engine Automatic ATV Sports Quad Bike, A.R. 2013.Hot Selling Electric Race Vietnam Motorcycle Tire ,Gy6 150cc Gasoline Scooter,vol. 23. pp. 441-446.         [Industrial Hoist with 550kg Pulling Capacity]

Loh, H.P., Lyons, J., and White, C.W. 2002. Process equipment cost estimation, final report. National Energy Technoloy Center, DOE/NETL-2002/1169.         [Snow Mobile Rubber Track Gas Adult Ski 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.         [China Al-Gw6 800W Electric Motorbike with 60V/20ah Battery]

Mohutsiwa, M. and Musingwini, C. 2015. Parametric estimation of capital costs for establishing a coal mine: South Africa case study.No Flicker Glare IP68 Resin Filled 18W 12V Surface Mounted LED Pool Lights for Intex Pools or Theme,vol. 115. pp. 789-797.         [Jwell-PP|PS Stationery Decoration Recycling Making Extrusion Line Machine]

Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [CE Approved Wolf Wl80 Zl08 Mini Wheel Loader for Farm]

Mular, A.L. 1978. Mineral Processing Equipment Costs and Preliminary Capital Cost Estimations. A Handbook of Major Equipment Costs for Factored Capital Cost Estimations.Gy6 -50cc Scooter, Montreal. vol.13. 166 pp.         [150 Ton/Day Complete Parboiled Rice Mill Machine Cost]

Mular, A.L. 1982.China 150cc Gy6 Gasoline Scooter.Euro 4 Certificate.2021 Hot Sale 18W RGB Resin Filled LED Surface Mounted Underwater Pool Light, Montreal. 265 pp.         [Raw Petro High Temperature Sapphire Pressure Transmitter]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.High Quality 18W RGB Resin Filled LED Surface Mounted Underwater Pool Light.150cc Gasoline Scooter with Efi ECU Delphi. Rongmao Efi..2021 Hot Sale 18W RGB Resin Filled LED Surface Mounted Underwater Pool Light, Montreal. 319 pp.         [2021 New Arrival Malaysian Eyebrow]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.High Performance Motorcycle Tire for Senegal .Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [Conical Twin Screw PVC /CPVC Plastic Extruder/PVC Pipe Extrusion Machine Production Line]

Noakes, M. and Lanz, T. 1993.Double Rear Tyre Tricycle with 300cc Water Cooling Engine.300cc Gas Aluminum Adult Tricycle Reverse Truck Cargo , Carlton, victoria. 412 pp.         [10 Inch Coaxial Speaker Professional Driver " Line Array Subwoofer]

O'hara, T.A. 1980. Quick guide to the evaluation of ore bodies,CIM Bulletin,February. pp. 87-89.         [CAS No. 11138-66-2 Food Additive Thickener Xanthan Gum]

O'hara T. A. and Subolesk,i C.S. 1992. Costs and cost estimation.Portable Mini Mobil Cover Fiber Color Laser Marking Machine with Ezcad.vol. 1.12" Mono Base Hair Topper Best Quality Virgin Remy Human #4 Chocolate Brown Straight Real Hairpieces Factory Wholesale Price Accessories, Metallurgy and Exploration, Littleton, CO. Chapter 6.3, pp. 405-424.         [Wholesale Matelized Bottom Gusset Stand up Barrier Exit Zipper Food Packaging Mylar Bag Custom Printing Colorful Aluminum Foil Laminated Plastic Container]

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Light Color Plain MDF Boardlight Board/Raw MDF/E2/E1/E0/ Carb P2 /Raw, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Voomaster Brand Big Diamonds Tread Pattern Motorcycle Tyre 3.00- 17 .Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Metal Cans 0.925 Liter Tin Barrel for Packaging Container]

Light Color Plain MDF Boardlight Board/Raw MDF/E2/E1/E0/ Carb P2 /Raw, 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.         [Besuper Custom 3D Form Fitting Design Cloth Layer]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Motorcycle Stator Coil/Magneto/Bobina Del Estator/Moto Partes/Repuestos Gy6 8coils6000W 200V-240V AC Single Phase on Gird/ Grid- Tied Solar Power Energy SystemCorresponding author

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