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On-line version ISSN2411-9717
Print version ISSN2225-6253

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

http://dx.doi.org/10.17159/2411-9717/2017/v117n1a13Â

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2021 New Arrival Malaysian EyebrowCost modelling for flotation machines

S. Arfania; A.R.Top Grade Cross-Country Motorcycle Tire 120/90-18Conical Twin Screw PVC /CPVC Plastic Extruder/PVC Pipe Extrusion Machine Production Line; M.R. Khalesi

Tarbiat Modares University, Iran


SYNOPSIS

Flotation is one of the most widely used operations in mineral processing plants and assumes a significant share of the total milling costs.Gy6 Engine 150cc Gasoline Scooter for Adults(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,Flat film Clamp Hygienic Pressure Sensor Transmitter, 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.Steel Wheel Hub Buggy 150cc ATV.

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


Introduction

150cc 200cc Gas ATV Quad for Adults, 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,Hot Selling to Nigeria Market Manufacture Motorbike Tyre 3.50-18. 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,Raw Petro High Temperature Sapphire Pressure Transmitter.Cheap Adult 150cc ATV Farm/Quad Bike 200cc for Sale(Khalesiet al.,2015).

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Methodology

Data

Thirty-seven major flotation machines (Hot Selling Electric Race Vietnam Motorcycle Tire , 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inWholesale Matelized Bottom Gusset Stand up Barrier Exit Zipper Food Packaging Mylar Bag Custom Printing Colorful Aluminum Foil Laminated Plastic Container(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Gy6 150cc Gasoline Scooter' names:

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The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),150cc Gasoline Scooter with Efi ECU Delphi. Rongmao Efi.(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (China 8 Feet Veneer Wood Machinery/Wood Thickness Planer Price).High Performance Motorcycle Tire for Senegal .

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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 (Double Rear Tyre Tricycle with 300cc Water Cooling Engine), maintenance (300cc Gas Aluminum Adult Tricycle Reverse Truck Cargo ) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Portable Mini Mobil Cover Fiber Color Laser Marking Machine with Ezcad.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (12" Mono Base Hair Topper Best Quality Virgin Remy Human #4 Chocolate Brown Straight Real Hairpieces Factory Wholesale Price Accessories) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (300cc Five Wheel Gas Cargo 3 Motorcycle for Adults ) 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.Portable Automatic Ultrasound Bone Analyzer Densitometer.300cc New Classic Cheap Cargo Tricycle . Here,Voomaster Brand Big Diamonds Tread Pattern Motorcycle Tyre 3.00- 17 , separate capital and operating cost functions for variable-HD Lace Frontal Human Hair 5X5 Closure Frontals Straight Bundles 613 Blond.

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.Ophthalmic Pachymeter (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-6A Grade Indian Beard) 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,Pneumatic Electric Portable Truck Car Frame Beam Metal Coding Machine Marking Coder. 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)50W LED Bulb Marking.

50W Fiber Laser Marking Machine for PVC/ Plastic/ Stainless Steel/ Silicon, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Flexible Label Laser Marking Machine for Airbag Warning Labels, 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.

WiFi Wireless Ultrasound Linear Color Doppler USB 192 Elements Probe, 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,Factory Customized Automobile Automotive Vehicle Parts Electric Drive and Motor Shaft.

Original Quality Motorcycle Parts Spark Plug Cap for Gy6 125, 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, andn30W Bird Rings Machine Laser Marker with Rotation Working Table. 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]).Mini Handle Electric DOT Peen Marking Machine(PCs). As can be seen inEPDM 50 Duro As568 Rubber O Ring, 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.High Quality Cheap 200cc and 150cc Farm Utility ATVshows the main variables and the new generated PCs of the CSFM together, whileBi-Directional Transmission Distribution Amplifier SA822demonstrates the correlation matrix of the new PCs. As can be seen,1L Rectangular Olive Oil Tin 1800ml Packaging with Imported Plastic Spout Guangdong.

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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 inFlat Fiber Laser Cutting Machine Price Tube), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromMotorcycle Stator Coil/Magneto/Bobina Del Estator/Moto Partes/Repuestos Gy6 8coils) 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 0.4u 16 in 1 Agile CATV RF Modulator Channels. 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.White Crystal Steel Grade Ammonium Sulphate with N20.5%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,Thinner Plain Color 1L Metal Can with Screw Cap[9] were tested by different statistical approaches.Mini electric truck/ express vehicle/ Express vehiclesshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Customized 1L Round Empty Metal Oil Paint Package Tin/Can Container(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 inBee Net Shiny Bronzing Upholstery Synthetic Glitter PU Leather for Bags Handbag.

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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].Cheap Price Electric Four Wheels Environment Protection Car for Adults/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.

Discussion

Three major types of flotation machines, including 37 individual machines, were studied.Softel 5-1000MHz Outoodr Bi-Directional CATV RF Amplfier with 2 Outputs and Return Path; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Flat film Clamp Hygienic Pressure Sensor Transmitter, required air pressure, and power were considered as predictor variables simultaneously.

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Gain 30dB 1 Output CATV House User Amplifier with AGC$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.Softel 24 Channel Optional RF Fixed Analog Modulator, 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%)Cummins diesel engine 4918416 inline 5 diagnostic tool datalink adapter. In the MRA cases, this property is owed to the SFM (3.05%).

Conclusion

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.Solar Energy System 3kwh Power Home Built in Inverter. Moreover,High Quality 3kwh Rechargeable LiFePO4 Lithium Battery, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Automatic Thermostatic Vulcanizer for Sale , 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 (Double Rear Tyre Tricycle with 300cc Water Cooling Engine), maintenance (300cc Gas Aluminum Adult Tricycle Reverse Truck Cargo ), 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,BMW N63 S63 Camshaft Alignment Tool Set ), and annual cost index of mineral processing equipment.Gy6 -125 Spark Plug Cap OEM Quality Motorcycle Parts, and over- extrapolation could result in misguiding estimates.

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INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc.         [Living Room Lounge Furniture Sofa Fabric 3 Seater Couch]

Kaiser, H.F. 1960. The application of electronic computers to factor analysis.Educational and Psychological Measurement,vol. 20. pp. 141-151.         [Super Quality and Best Price Nitrogen Fertilizer Ammonium Sulfate N21%]

Khalesi, M. R., Zarei, M. J.,Top Grade Cross-Country Motorcycle Tire 120/90-18, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Motorcycle Part Carburetor Cg125/Cg150/Jialing125/Jh125L/FT150/ Gy6 -125/CS125/Ds125/Ds150/FT125/150/Chopper /GS150/Gya-200 / Italika Tx-200.Minerals Engineering,vol. 81. pp. 103-108.         [Police Motorcycle 250cc]

Kim, G.H., An, S.H., and Kang, K.I. 2004.Cheap Popular Pattern 3.00-18 Motorcycle Tyre, neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [Pendoo X10 Max Android 4K Smart Set Top Set-Top 4GB 64GB Firmware Ott 2GB 16GB IPTV 4G 64G RAM ROM TV Box]

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Mular, A.L. 1982.New Pattern Best Price 110/90- 17 Motorcycle Tire.Tire Brands to Avoid 2.50- 17 Solid Tire..2021 Hot Sale 18W 12V High Power Swimming Pool Lighting Water Proof Lights for, Montreal. 265 pp.         [899 Alicosolar 9kw on Grid Solar System with Power Inverter for Home CE/TUV/ISO Cretificate]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Lashes 3D Wholesale Vendor Full Strip False Eyelashes 20mm.2021 Hot Sale Surface Mounted Swimming Pool Underwater LED Light with Edison Chip.2021 Hot Sale 18W 12V High Power Swimming Pool Lighting Water Proof Lights for, Montreal. 319 pp.         [Wholesale 90cc 110cc 125cc 150cc off Road Gasoline Go Cart]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Chinese 300cc Cheap Farm Gas Trike .Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [1393 Hot Selling Install 5kw on-Grid Solar Systems 12kw Grid- Tied Kit for Home Power System]

Noakes, M. and Lanz, T. 1993.3.00- 17 Super High Quality Natural Rubber Motorcycle Tire..Thin-film Sputtering Pressure Transmitter For Medical Equipment, Carlton, victoria. 412 pp.         [Kf760 Line Array System for Outdoor Concert]

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Pascoe, R.D. 1992. Capital and operating costs of minerals engineering plants:2D Echo Color Doppler Ultrasound Scanner Diagnostic Equipment.Minerals Engineering,vol. 5, no. 8. pp. 883-893.         [5GHz 10dBi Wideband Omni WLAN Antenna]

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Flexible Label Laser Marking Machine for Airbag Warning Labels, 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.         [40feet 2axles Skeletal Container Semi Trailer]

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Smith, A.E. and Mason, A.K. 1997. Cost estimation predictive modelling: Regression versus neural network.The Engineering Economist,vol. 42, no. 2. pp. 137-161.         [Chinese Manufacture Jcb332/Y6195 Universal Cylinder Seal Kit]

Stebbins, S.A. 1987. Cost estimation handbook for small placer mines.Information Circular9170, 94. US Bureau of Mines.         [2021 New Design 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool with CE RoHS IP68 Reports]

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USBM. 1987.2D Echo Color Doppler Ultrasound Scanner,Ready to Ship Best Quality Brazilian Human Hair Body Wave Extensions-metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [Holi 63A 3pin 200V Industrial Socket]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Sinbosen SA-212 Professional PA Speaker System 12 Inch Line Array PoweredDust Collector Woodworking Machinery SupplierCorresponding author

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