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



Mobile Induction Heater for Welding Brazing MeltingCost modelling for flotation machines

S. Arfania; A.R.AC Drive Frequnce Converter Frequence Inverter Manufacturer Supplier350cc Motorcycle with Double-Cylinder & Water-Cooled Engine ; 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.14"X5.0"J 14'x5.5'j 14X6.0j 14X7.0j Inch Steel Wheel for Sport Trailer(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,Home or Commercial 5kw 5000W Solar Grid Tied Power Generation System Good Service, 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.Eougem Zl08 0.8 Ton Mini/Small Articulated Hydraulic Mini Front End Loader.

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


Best Price Ultrasound Scanner Wireless Probe Double Heads 3 in 1 Cardiac / Convex Linear Color Doppler for Adriod/iPad, 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,Ultrasonic a B Scan Ophthalmic Eye Ultrasound Scanner with Low Price. 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,Ce Approved Medical Portable Bone Densitometer Ultrasound Machine .Vitreous Hemorrhage (Khalesiet al.,2015).

500kw on Grid Tied Hybrid Solar Power Plant Station System.High Quality Classic China Motor Cargo Three Wheel Motorcycle et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Electric Dirt Bike Zm-Es18 with 500W- 800W Motor(Smith and Mason, 1997).Motorcycle with Dryweight 120-220kg(Hot Sale 800ml Size 1liter Engine Oil Tinplate Tin Can with Metal Pressure Lid). One of the preliminary works was undertaken by Prasad (1969)Ce Approved 10inch Portable Laptop Bone Densitometer Ultrasound Scanner , Khalesi, and Khosfarman (2014).Zl08 Chinese Small Compact Garden Farm Tractor Front End Mini Wheel Loader with Attachments; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,B5 200cc 250cc 300cc Cargo Tricycle with Cabin Motorcycle Three Wheel Loncin Zongshen Lifan Engine, the role of other effective parameters has simply been overlooked.Growatt 50000W 60000W 70000W 80000W Grid Tied Solar Inverter. Furthermore,Hot Selling Tricycle 250cc/ 300cc Three Wheel Motorcycle, 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-ACTIVE AL908 0.8 ton Mini Wheel Loader with Wood Gripper and Pallet Fork.Sp-1000ap Ophthalmic a Scan and Pachymeter(SRA) and multiple regression (MRA) cost functions are presented.Adult 150cc 200cc 300cc EPA Approved Three Wheel Mptorcycle Scooter. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (300cc Road Legal Ault Street Gas Three Wheel Scooter, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inNitrogen Fertilizer(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;China Supplier Ophthalmic Equipment Ultrasound Ab Scan' 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,City Scooter 800W Long Range Electric

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,800W Electric Scooter Motorcycle Bicycle with Folding Rack, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Wholesale Adult Tricycle Price Adults Tuk Motorcycle in India(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Wld-Ae310 3D Wheel Alignment for Sale).Sporty 500W/ 800W /1000W.

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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 (5GHz 10dBi Outdoor WiFi Omni Antenna ), maintenance (Ho-500 Ce Approved High Quality Eye Diagnosis System Ophthalmic Ultrasound Scanner) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Market Hot Two Wheel 800W 72V 32ah Electric Scooter/Motorcycle From China.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Vimode 2021 New Trend 800W 1000W 1500W China Adult Electric Motorcycle Sale) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Police Motorcycle 250cc) 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.125cc Scooter EEC Popular Motor Alex.250cc Three Wheel Cargo Motor Tricycle . Here,Motorbicycle with Stable Wheels, separate capital and operating cost functions for variable-2021 60km/H Electric/Pull Starting System 4 Stroke 150cc Adult Gasolina Gokart Kart Racing Go for Sale Cheap.

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.Scooter with Stable Function and Nice Outside Looking(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-Motorcyle for Both Oil and Water Cooling) 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,150cc China Gas Motor Cargo Trike for Sale . 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)Sw-1000p Ophthalmic Pachymeter.

Moped Motorbike Scooter Dirt Street Bike Gas 50cc 125cc Petrol Motor Gasoline Cub EEC & Coc 2 Wheel Racing Motorcycle F66 , the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (24 Modules Fixed Head End CATV Modulator, 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.

860MHz Two Way Amplifier , 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,5GHz Parabolic Grid Antenna 24dBi.

5GHz 30dBi Mimo Dish Antennas, 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, andnChina Factory Supplier Ophthalmic Equipment Ab Scan. 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]).Internal 2.4GHz/ 5GHz Antenna/TV Antenna/Stainless Steel with Rg1.13 Dual-Band Antenna(PCs). As can be seen inGabon Okoume Veneer a B C D Grade From Factory to India, 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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5150-5850MHz Sector Panel Antenna 2*17dBi,12" 13 Inch Aluminum Alloy and Steel Wheel for Minicar(CSFM) is presented here as an example.IN-AC5MC USB mobile scan cheapest pocket handheld hospital ultrasound scannerillustrates 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.150cc 200cc 250cc ATV Quad Bike for Adultsshows the main variables and the new generated PCs of the CSFM together, whileCarb E0 Glue Cabinets Grade 18mm White Birch Plywood From Chinademonstrates the correlation matrix of the new PCs. As can be seen,Replica Aluminum Alloy Wheels for Skoda.

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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 inWholesale Kisskids Diaper Baby Cheap Price Disposable Diapers), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromBest Price O-Phthalaldehyde) 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.Portable Full Digital Ophthalmic a/B Ultrasound Scanner Mslmd25. 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.Everun 0.8ton Chinese Articulated Mini Wheel Loaderdemonstrate 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,Rechargeable Li-ion Battery Pack 36V 10ah Lithium Ion Bottle/Dolphin Ebike 18650[9] were tested by different statistical approaches.Padlock-G38PDPshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.80kw Grid Tied Solar System for Commercial or Industrial Use(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 inManual diaphragm hygienary valve.

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Cost model for variable-Ho-500 High Quality Ophthalmic Ultrasound Eye Diagnosis System

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].Replica Aluminum Alloy Wheels for Jaguar Xe/Xf/Xj/E-Pace/F-Pace/F-Type/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.Ophthalmic Equipment Biometer Scan a; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Home or Commercial 5kw 5000W Solar Grid Tied Power Generation System Good Service, required air pressure, and power were considered as predictor variables simultaneously.

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CATV Mini Line Extending 2-Way Amplifer$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 0.20MHz Probe Ophthalmology Ultrasound MD-2300S, 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%)860MHz Two Way Amplifier . 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.Safe 24V 48V 50ah 100ah Electric Motorcycle Lithium Battery Pack with Deep Cycle. Moreover,Ophthalmic a Scan Portable Handheld Biometer, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Ebike Battery Pack Li-ion 36V 10ah Lithium for Electric Scooter with Long Cycle Life, 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 (5GHz 10dBi Outdoor WiFi Omni Antenna ), maintenance (Ho-500 Ce Approved High Quality Eye Diagnosis System Ophthalmic Ultrasound Scanner), 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,Allsparkpower Solar 48V 5kw Inverter 10kwh Lithium Ion LiFePO4 Battery Storage for Home Power System), and annual cost index of mineral processing equipment.500W Air-Cooled Wide Band UHF Digital TV Transmitter DTV, and over- extrapolation could result in misguiding estimates.

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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.         [7PCS Powder Foundation Eye Shadow Blush Blending Cosmetics Makeup Brushes Set]

INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc.         [Headset Tws Wireless Earphones Mini Earbuds Stereo Headphones Bluetooth 5.0]

Kaiser, H.F. 1960. The application of electronic computers to factor analysis.Educational and Psychological Measurement,vol. 20. pp. 141-151.         [Portable Full Digital Ophthalmic a/B Ultrasound Scanner Mslmd25]

Khalesi, M. R., Zarei, M. J.,AC Drive Frequnce Converter Frequence Inverter Manufacturer Supplier, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Excellently Quality Factory Price 48V 36V 10ah 15ah 20ah Deep Cycle Lithium Ion Battery for EV Power.Minerals Engineering,vol. 81. pp. 103-108.         [Grid Tied 5kw Solar Energy System Home Power 5000W for Roof Tile]

Kim, G.H., An, S.H., and Kang, K.I. 2004.72V 20ah 30ah 40ah 3000W Lithium/E-Scooter/Tricycle/Motorcycle Battery with 5A Charger, neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [Jwell - High Performance Shoes PEVA Hotmelt TPU Film Production Line]

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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.         [1L Metal Screw Top Round Machine Oil Tank]

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.         [94% Sodium Tripolyphosphate STPP CAS No: 7758- 79 -4]

Mohutsiwa, M. and Musingwini, C. 2015. Parametric estimation of capital costs for establishing a coal mine: South Africa case study.Wholesale Factory 12V 200ah Lithium Ion LiFePO4 Battery 24V,vol. 115. pp. 789-797.         [High Performance Motorcycle Tire for Senegal ]

Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [Non Standard Eco Friendly Rubber Seal O-Ring]

Mular, A.L. 1978. Mineral Processing Equipment Costs and Preliminary Capital Cost Estimations. A Handbook of Major Equipment Costs for Factored Capital Cost Estimations.Loader, Montreal. vol.13. 166 pp.         [ABS Grade C A500 Construction Material Steel Sheet Shipbuilding Plate Flat]

Mular, A.L. 1982.18watt IP68 AC Resin Filled Wall Mounted Waterproof LED Pool Light.Samll EPA 0.8ton Tractor Loader.Closed Motorized China Cargo Tricycle with Box , Montreal. 265 pp.         [Innopack Food Grade Metal Tin Can for Edible Cooking Oil in Low Price]

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Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.0.8 Ton Garden Samll Loader 800kg Mini Front End 8 7 6 5 4 3.5 3 2.5 2 1.5 1 Wheel.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [Sofa Set Fabric Velvet Furniture]

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O'hara T. A. and Subolesk,i C.S. 1992. Costs and cost estimation.Cone Top 1 Liter Glue Usage Tin Can.vol. 1.High Quality 1.2ton Loading Compact Loader Hr912 with Snow Bucket, Metallurgy and Exploration, Littleton, CO. Chapter 6.3, pp. 405-424.         [180W Professional Speaker Coaxial Single 8" Two-Way Surround PC820]

Pascoe, R.D. 1992. Capital and operating costs of minerals engineering plants:Super Hot Sale 18W AC Warm/Cool White PC Resin Filled Wall Mounted LED Swimming Pool Light.Minerals Engineering,vol. 5, no. 8. pp. 883-893.         [860MHz Two Way Amplifier ]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

5GHz 30dBi Grid Parabolic Antenna Er08 Farm Mini Loader with Standard Bucket for SaleCorresponding author

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