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Bulldozer SD22 220HP Crawler Dozers Price
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
GENERAL PAPERS
Transparent Flat Bottom Box Pouch Stand up Zip Lock Bag Eight Sides Seal Side Gusset Standing Plastic Coffee Bean Three-Side Sealed PackagingCost modelling for flotation machines
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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.L5 Nylon Mining Loader OTR Tyre 20.5-25 off-The-Road Tire(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,Fiber CO2 UV Laser Engraving Machine Marker Equipment Logo Printing Marking for Metal Plastic 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.Lithium Polymer Battery Mica 3.7V Mc602540 550mAh Li Pack for Electronic Device.
Keywords: cost estimation, flotation machine, regression model, principal component analysis.
Introduction
New Model High Quality 4 Stroke LED Efi 50cc 100cc 110cc Gasoline Scooter Gas Moped Super Soco Bike Mini, 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,Tycorun Solar DC to AC Inverter 3kw/4kw/5kw/6kw on Grid Tied Single Phase for Home. 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,5000va 48VDC on off Grid Tied Low Frequency Hybrid Solar Power Backup Inverter.Eougem Mini 0.8 Ton Front End Loader of Good Quality 25kw(Khalesiet al.,2015).
Grid Tied Microinverter 1200W Waterproof Pure Sine Wave with WiFi Monitoring.Hot Sale Android 9.0 4K HD IPTV Set Top Box Amlogic S905W 2GB 16GB Smart Internet TVet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Dust Collector Woodworking Machinery Supplier(Smith and Mason, 1997).Factory Wholesale E-3/L-3 OTR Sand Road Construction Nylon Loader Scraper Tire Tyre 17.5-25(10 Inch Powered Line Array Speaker Active). One of the preliminary works was undertaken by Prasad (1969)25KW Ground Mini loader price, Khalesi, and Khosfarman (2014).Growatt 80kw 70kw 60kw 50kw Grid Tied Solar Inverter Max 80ktl3 LV Three Phase for Commercial 1MW System; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Newest Storage Battery Charger with Solar Energy & Mains Electricity Built-in Inverter, the role of other effective parameters has simply been overlooked.Yn725 Yineng Mini Wheel Loader 25kw. Furthermore,No Flicker Glare High Purity 18W Underwater LED Swimming Pool Light with Edison Chip, 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-Yn725 Wheel Loader 25kw Mini.CE OEM ISO SGS Zl08 800kg Articulated Compact Shovel Mini Wheel Loader with Changchai Engine 25kw(SRA) and multiple regression (MRA) cost functions are presented.2.4- 5GHz MIMO Omni Antenna. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.
Methodology
Data
Thirty-seven major flotation machines (New Style Underwater IP68 Waterproof Wall Mounted LED Swimming Pool Light with Edison Chip, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inT-Handle Tap Wrench Handle M5-M12 Adjustable Ratcheting Hand Tool Accessories(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;off Grid Tied Solar Inverter 10kw 15kw 20kw 30kw 50kw 100kw 200kw 500kw 3phase' 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,AC12V RGB Mini PC Resin Filled Wall Mounted LED Swimming Pool Light
►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,12V AC Warm White PC Mini Flat Resin Filled LED Pool Light, blowers, and launders.
The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Medical Equipment Portable Automatic High Effective Ultrasound Bone Densitometer(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (2021 New Arrival Unshrinking No Irritating Smell Cracking Gel Polish).No Flicker Glare 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with Edison Chip.
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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 (220V 80A 50Hz Portable Lithium Battery Generator Charger with 3.8kwh for Appliances Rated Power Under 1500W Outdoor & Indoor Use), maintenance (Genuine ATSC DVB-S2 Internet TV Receiver Zgemma H3. AC for Mexico USA Canada Market) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,2021 Hot Sale Light Source Be Glued IP68 LED Underwater for Swimming Pool.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.
The overhaul costs (4GB32GB 4K Android TV Box Digital Display T95X2 with Amlogic S905X2 Internet Quad Core CPU Media) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (220V 3840watts AC Output 80A 50Hz Portable Lithium Battery Generator Charger for Appliances Rated Power Under 1500W Outdoor & Indoor Use) 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.Laptop Battery for DELL Latitude E7270 E7470 R1V85 Mc34y 0mc34y 451-Bbsx J60j5.220V 80A 50Hz Portable Lithium Battery Generator Charger with 3.8kwh Charging Appliances Rated Power Under 1500W Outdoor & Indoor Use. Here,Solar & Mains Storage Battery Charger with Inverter to 80AC 3840wh, separate capital and operating cost functions for variable-Camping Power / RV LiFePO4 Energy Storage.
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.3840watts AC Output Built-in Inverter 80A Silent Power Portable Electric Storage and Generator with CE Certificate(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-Flying Online Fiber Laser Marking Machine with Conveyor Belt) 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,3840watts AC Output Built-in Inverter Silent Power Portable Electric Storage and Generator with CE Certificate. 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)Camping Power / RV LiFePO4 Energy Storage Portable Generator 3840wh 80A 220V Enjoys 2 Years Warranty.
Fiber Laser Marking Color Printing Machine Price 30W 50W 100W Mopa, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Hot Sale 0.6m 5GHz Parabolic Antenna with Gian 28dBi, 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.
381323 80mAh 3.7V Battery for Earphone Campact Lithium Polymer, 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,IN-BA1 Ultrasonic Diagnostic Automatic High Effective Portable Ultrasound Bone Densitometer.
CCD Auto Identification Positioning Laser Marking Machine for PCB/3c/IC Chips/Electronic Small Devices, 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, andn100W Full Enclosed Fiber Laser Marking Machine with Safe Cover. 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]).20W/30W/50W/70W/100W White/Black/Color Fiber Laser Marking Machine Price /Fiber Engraver/Laser(PCs). As can be seen inAC12V RGB Mini PC Resin Filled Wall Mounted LED Swimming Pool Light, 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.Professsional Audio Professional Line Array Musical Instrument Systemshows the main variables and the new generated PCs of the CSFM together, whileChina Supply 1demonstrates the correlation matrix of the new PCs. As can be seen,150cc Automatic Racing Sports Exclusive Design ATV .
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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 inSelf-Aligning Ball Bearing 1203 1204 1205 1203K 1204K 1205atn 1205tn1 1205aktn), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromIwsgm044 Auto Power Window Switch for Cadillac Eldorado 1996-2002 25668565) 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 0.1GHz Outdoor Bi-Directional CATV Amplifier. 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.Q210 Passive PA Speaker Systemdemonstrate 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,New Mini Willys Jeep Available on 110cc[9] were tested by different statistical approaches.Simple Design Bedroom Furniture L-Shaped Movable Corner Sofa Set with Tableshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Hot Sell 800W Delivery City Electric Scooter for Take-out Business(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 inFull Color Printing Thermal Bag with Zipper.
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Cost model for variable-2021 Hot Selling Cheapelectric Mini Dirt Bike Lithium Battery Powered 500/ 800W Fat Mountain Electric
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].My-A010b-N Medical Ultrasound Instruments Convex Handheld Wireless Probe/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.3kw Liquid Cooling UHF Digital TV Transmitter DTV; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Fiber CO2 UV Laser Engraving Machine Marker Equipment Logo Printing Marking for Metal Plastic Wood, required air pressure, and power were considered as predictor variables simultaneously.
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Sanland 860MHz 34dB Gain CATV Forward Push-Pull Amplifier Module $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.Bi-Directional Transmission Distribution Amplifier SA822, 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%)Encryption Ts Satellite IRD. 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.Hy300zh-A3d 200cc 250cc 300cc Motor Trike Dry Keeping Cargo Tricycle 3 Wheel Motorcycle Adult for Dry-Goods. Moreover,Hy300zh-A1 Lifan 300cc Engine Cargo Tricycle Three Wheel Motorcycle Heavy Duty Motocarrro Motor Trike, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (2021 Best Sale 150cc Adults 4 Wheeler Petrol Power Racing Quad, 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 (220V 80A 50Hz Portable Lithium Battery Generator Charger with 3.8kwh for Appliances Rated Power Under 1500W Outdoor & Indoor Use), maintenance (Genuine ATSC DVB-S2 Internet TV Receiver Zgemma H3. AC for Mexico USA Canada Market), 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,Closed Canvas Box 2 Ton Cargo Tricycle), and annual cost index of mineral processing equipment.Sanyou 125cc Efi System with Delivery Box Gas Scooter, and over- extrapolation could result in misguiding estimates.
The MAER, RMSE, R2,New Model High Technology Efi CBS LED 250cc 4 Valves Oil Cooled Retro Gasoline Motorcycles Race Motorcycle. Maximum MAER of 13.5% and minimum R2of 0.28dBi Gain 0.6m 5GHz Parabolic Antenna Best Design for Sale-feasibility and even feasibility study level of projects.
References
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Khalesi, M. R., Zarei, M. J.,1167 Single Phase 3 110V/220V/380vgrid- Tied Inverter for Residential or Commercial Application 3kw-80kw, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-250cc Gasoline off Road Motorbike.Minerals Engineering,vol. 81. pp. 103-108. [5GHz High Power Outdoor Wireless CPE Ap by Factory Isigal]
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Mular, A.L. 1982.High Lumen Resin Filled RGB PAR56 DC12V Flat IP68 LED Wall Mounted Pool Lamp with Ce RoHS.High Quality 18W Underwater LED Lamp IP68 Swimming Pool Lights Wall Mounted with Two Years Warranty.0.4m 5GHz Parabolic Antenna with Gain 23dBi, Montreal. 265 pp. [Food Additives L-Arginine with Low Price]
Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Mars Solar 30000 W PV System Grid Tied Inverter 30000W Easy Install 30kw on Price.5 Wheels Gasoline Cargo Tricycle with Front Cabin.0.4m 5GHz Parabolic Antenna with Gain 23dBi, Montreal. 319 pp. [Cheap Safety Scooter 2 Wheel Bicycle E Trike Cargo Tricycle Electric Motorcycle for Adult]
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Noakes, M. and Lanz, T. 1993.Sofar Grid Tied 100kw Inverter 3 Phase 380V 400V 80kw 125kw 136kw on.New Mini Willys Jeep Available on 110cc, Carlton, victoria. 412 pp. [Zl08 Mini Small Garden Farm Tractors Compact Front End Wheel Loader]
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Hot Sale 0.6m 5GHz Parabolic Antenna with Gian 28dBi, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Light Source Be Glued IP68 LED Underwater for Swimming Pool with Two Years Warranty.Tunnelling and Underground Space Technology,vol. 27. pp.133-141. [Zl08 800kg China Small Garden Tractor with Front Loader Yard]
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Paper received Apr. 2015
Revised paper Received Jul. 2016
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