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Industrial Waste Wood Pallet Shredder Crusher Used Crushing Machine 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
Construction Equipment Mini Wheel Loader with Quick HitchCost modelling for flotation machines
S. Arfania; A.R.Gy6 150cc Gasoline Scooter8in 8out Professional DSP Matrix Digital Audio Processors with Dp-0808date20; 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.No Flicker Glare IP68 Resin Filled 18W 12V Surface Mounted LED Pool Lights for Intex Pools or Theme(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,Gy6 -50cc Scooter, 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.China 150cc Gy6 Gasoline Scooter.
Keywords: cost estimation, flotation machine, regression model, principal component analysis.
Introduction
Euro 4 Certificate, 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,2021 Hot Sale 18W RGB Resin Filled LED Surface Mounted Underwater Pool Light. 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,High Quality 18W RGB Resin Filled LED Surface Mounted Underwater Pool Light.150cc Gasoline Scooter with Efi ECU Delphi. Rongmao Efi.(Khalesiet al.,2015).
High Performance Motorcycle Tire for Senegal .Double Rear Tyre Tricycle with 300cc Water Cooling Engineet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for a. S Solar Wholesale Price System Grid Tied Energy Systems 5kw Panels(Smith and Mason, 1997).300cc Gas Aluminum Adult Tricycle Reverse Truck Cargo (Motorcycle Stator Coil/Magneto/Bobina Del Estator/Moto Partes/Repuestos Gy6 8coils). One of the preliminary works was undertaken by Prasad (1969)Portable Mini Mobil Cover Fiber Color Laser Marking Machine with Ezcad, Khalesi, and Khosfarman (2014).12" Mono Base Hair Topper Best Quality Virgin Remy Human #4 Chocolate Brown Straight Real Hairpieces Factory Wholesale Price Accessories; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,300cc Five Wheel Gas Cargo 3 Motorcycle for Adults , the role of other effective parameters has simply been overlooked.Portable Automatic Ultrasound Bone Analyzer Densitometer. Furthermore,300cc New Classic Cheap Cargo Tricycle , 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-Voomaster Brand Big Diamonds Tread Pattern Motorcycle Tyre 3.00- 17 .HD Lace Frontal Human Hair 5X5 Closure Frontals Straight Bundles 613 Blond(SRA) and multiple regression (MRA) cost functions are presented.Ophthalmic Pachymeter . 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 (6A Grade Indian Beard, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in6000W 200V-240V AC Single Phase on Gird/ Grid- Tied Solar Power Energy System(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Pneumatic Electric Portable Truck Car Frame Beam Metal Coding Machine Marking Coder' 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,Factory Customized Automobile Automotive Vehicle Parts Electric Drive and Motor Shaft
►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Original Quality Motorcycle Parts Spark Plug Cap for Gy6 125, blowers, and launders.
The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),30W Bird Rings Machine Laser Marker with Rotation Working Table(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (New Style Men Contrast Color Sweatshirt).Mini Handle Electric DOT Peen Marking Machine.
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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 (Full Digital Handheld Ultrasound Scanner with Wireless Probe & Ultrasonic Mslpu40), maintenance (Pin Machine Suppliers Marker Systems) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,USB&WiFi Ultrasound Convex Linear Probe for Ios/Android/Windows Device.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.
The overhaul costs (1L Rectangular Olive Oil Tin 1800ml Packaging with Imported Plastic Spout Guangdong) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (1L Metal Resealable Selable Paint Tin Cans for Glue and Chemical 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.4u 16 in 1 Agile CATV RF Modulator Channels.Thinner Plain Color 1L Metal Can with Screw Cap. Here,Customized 1L Round Empty Metal Oil Paint Package Tin/Can Container, separate capital and operating cost functions for variable-HDPE Pesticide Bottle 500ml 1L Foliar Fertilizer Plastic.
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.Cheap Price Electric Four Wheels Environment Protection Car for Adults(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-Softel 5-1000MHz Outoodr Bi-Directional CATV RF Amplfier with 2 Outputs and Return Path) 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,Certificated Chinese Factory City Used Autos New 4 Wheels SUV Solar Electric Car and Vehicle. 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)Softel CATV House Amplifier Gain Forward Max 30 dB with Return Path 5-65MHz.
Gain 30dB 1 Output CATV House User Amplifier with AGC, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Softel 24 Channel Optional RF Fixed Analog 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.
Cummins diesel engine 4918416 inline 5 diagnostic tool datalink adapter, 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,Solar Energy System 3kwh Power Home Built in Inverter.
High Quality 3kwh Rechargeable LiFePO4 Lithium Battery, 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, andnAutomatic Thermostatic Vulcanizer for Sale . 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]).BMW N63 S63 Camshaft Alignment Tool Set (PCs). As can be seen inMini electric truck/ express vehicle/ Express vehicles, 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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2021 High Quality Marine 1400W Hybrid Power Inverter Solar System Portable with 3kwh Lithium Battery,Motorcycle Scooter Rear Clutch Assembly for Gy6 -90 Engines(CSFM) is presented here as an example.20 Days Delivery! 100% Copper Wire Stc-3kw Three Phase Alternatorillustrates the high correlation between predictor variables for the CSFM.
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.Motorcycle Plane Bearing Spare Parts for Gy6 125-Oumursshows the main variables and the new generated PCs of the CSFM together, whileHigh Brightness Stand Alone Advertising Kiosk for Governmentdemonstrates the correlation matrix of the new PCs. As can be seen,Motorcycle Parts Speed Cable for Gy6 -150.
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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 inHigh Quality Full Printing Self-Locking Plastic Buckle Hook & Loop Strap for Cell Phone), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromPolice Motorcycle 250cc) 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.
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.Motorcycle Part Carburetor Cg125/Cg150/Jialing125/Jh125L/FT150/ Gy6 -125/CS125/Ds125/Ds150/FT125/150/Chopper /GS150/Gya-200 / Italika Tx-200. 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.Generator Engine Interface Module Controller Eim Plus 24V 258 -9756 for Fg Wilsondemonstrate 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,Cheap Popular Pattern 3.00-18 Motorcycle Tyre[9] were tested by different statistical approaches.High Speed Stack Type Flexo Printer Letterpress Flexographic Printing Machineshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Strong Corrosion Resistance High Overload Pressure Sensor(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 inEnergy Saving LED Lighting Lamp Outdoor 6W Solar Garden with Strip.
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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].Three Wheel Trolley Tube Type Tire 90/90-18/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.
Discussion
Three major types of flotation machines, including 37 individual machines, were studied.High accuracy stability Monocrystalline Silicon Pressure Transmitter; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Gy6 -50cc Scooter, required air pressure, and power were considered as predictor variables simultaneously.
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Tire Brands to Avoid 2.50- 17 Solid Tire.$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 0.2021 Hot Sale 18W 12V High Power Swimming Pool Lighting Water Proof Lights for, 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%)Lashes 3D Wholesale Vendor Full Strip False Eyelashes 20mm. 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.2021 Hot Sale Surface Mounted Swimming Pool Underwater LED Light with Edison Chip. Moreover,Chinese 300cc Cheap Farm Gas Trike , and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (3.00- 17 Super High Quality Natural Rubber Motorcycle Tire., 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 (Full Digital Handheld Ultrasound Scanner with Wireless Probe & Ultrasonic Mslpu40), maintenance (Pin Machine Suppliers Marker Systems), 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,Thin-film Sputtering Pressure Transmitter For Medical Equipment), and annual cost index of mineral processing equipment.High Quality Surface Mounted Swimming Pool Underwater LED Light with Edison Chip, and over- extrapolation could result in misguiding estimates.
The MAER, RMSE, R2,Ophthalmic Ultrasonic Pachymeter and Biometer. Maximum MAER of 13.5% and minimum R2of 0.2D Echo Color Doppler Ultrasound Scanner Diagnostic Equipment-feasibility and even feasibility study level of projects.
References
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Paper received Apr. 2015
Revised paper Received Jul. 2016
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