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vol.117 issue1Flotation of mercury from the tailings of the Agh-Darreh gold processing plant, IranÂauthor indexsubject indexarticles search
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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

GENERAL PAPERS

New Go Kart Cost modelling for flotation machines

S. Arfania; A.R.Gy6 -80 Motorcycle Parts Starting Motor GearFlat film Clamp Hygienic Pressure Sensor Transmitter; 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.Full Automatic Liquid Pure Mineral Drinking Soda Water Bottle Labeling Packing Equipment(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,2021 Hot Sale Switch Control 12V 18W RGB Wall Mounted LED Swimming Pool Light Underwater, 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.Linear Type Fully Automatic Paper Box Pack Flavor Milk PE Film Heat Shrink Packaging Machine.

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


Introduction

Fully Automatic Shrink Wrapping Packing Machine, 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,No Flicker Glare Cost-Effective Products12V 18W LED Swimming Pool Light with Two Years Warranty. 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,Newest 250cc Farm UTV 200cc Go Kart Buggy with Ce.No Flicker Glare Pool LED Light Wnderwater Waterproof RGB Wall Mounted Swimming Lamp with Edison Chip(Khalesiet al.,2015).

Motorcycle Stator Coil/Magneto/Bobina Del Estator/Moto Partes/Repuestos Gy6 8coils.No Flicker Glare Pool LED Light Wnderwater Waterproof RGB Wall Mounted Swimming Lamp with Two Years Warrantyet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Good Performance Polyurethane PU Resin for Gravure Printing Ink(Smith and Mason, 1997).Gy6 /Jog Motorcycle Regulator/Rectifier Parts(Diesel Engine Parts Fuel Injection Nozzle 148pn306). One of the preliminary works was undertaken by Prasad (1969)Yog Spare Parts Accessories Motorcycle Stator Comp Gy6 125, Khalesi, and Khosfarman (2014).Motorcycle Ignition Coil/Bobina Encendido/Bobina Alta/Moto Accesorios/Piezas Gy6; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Gy6 /Jog Motorcycle Spare Parts Regulator/Rectifier, the role of other effective parameters has simply been overlooked.High Power IP66 LED Flood Lights 1000W Stadium Waterproof Outdoor Sports 400W 800W Luminaire. Furthermore,20MHz Medical Crf Machine Deep Wrinkle Removal Beauty Instrument, 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-Motorcycle Spare Part Turn Light for Gy6 -150.Fractional RF & Thermal Machine (SRA) and multiple regression (MRA) cost functions are presented.Motorcycle Ignition Coil Bobina Alta Tvs Star Gy6 -125 Cg125. 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 (Good Price Top 20mrf Crf Wrinkle Removal Anti-Aging Device, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inHyundai Excavator Hydraulic Cylinder Bucket Seal Kit for R210(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;20MHz RF Face Skin Lifting and Tightening Machine' 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,ADSS Body Slimming Beauty Machine

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Portable Themagic Fractional RF Machine for Skin Tightening, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),China Wholesale 110/90-16 High Quality Motorcycle Tyre/Tire(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (China Wholesale Polyester Woven Tsa Luggage Belt and Scale).Peonylighting 800W High Pole Stadium LED Flood Yard Lamp.

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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 (High Power Outdoor Flood Light for Stadium/ Tennis Court 600W 800W 1000W), maintenance (Microneedle Fractional RF Thermagic Face Lift Wrinkle Removal Machine) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,RF Microneedle Thermal Facial Lift Beauty Equipment.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Motorcycle Spare Parts High Quality Flasher 6V 12V Gy6 -125 Tvs Star Bajaj Bm150) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Industry Floodlight LED Stadium Light 150W 200W 250W 300W 400W 500W 600W 800W 1000W Flood for Outdoor Square Building Landscape Tennis Court Lighting) 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.High Feedback Tied Malaysian Virgin Hair.Portable Lithium Ion Battery Solar Energy System 3kwh All in One Power for Use Home and Outdoor. Here,Customized 48V LiFePO4 Battery 50ah Lithium Ion for Solar Energy Storage System Inverter PV EV 2.5kwh 3kwh 5kwh, separate capital and operating cost functions for variable-150cc 300cc 500cc 650cc 2 Seat Adult Frames Go Kart.

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.200cc Racing Go Kart for Sale Cheap(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-China 300cc Adult Road Legal 2 Seat Pedal Go Kart) 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,3kwh Solar Energy Storage System. 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)2021 New Design 3kwh off Grid Solar Power System LiFePO4 Battery for Home Use with Built-in Inverter.

Peanut Shell and Rice Husk Continuous Carbonization Oven, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Factory Direct Wholesale 300- 17 Motorcycle Tire/Tyre, 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.

ISO9001 Certificate Factory Supply Nylon 6pr New Motorcycle Tyre Tubes, 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,Handheld Small Portable Digital High Frequency Induction Brazing Machine with Soft Cable.

Mobile Digital High Frequency Mini Induction Brazing Welder for Aluminum Tube Pipe, 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, andnHigh Quality Radio Frequency Aesthetic Equipment. 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]).China Good Quality 2.75- 17 Tubeless Motorcycle Tire/Tyre(PCs). As can be seen inInverter AC Drive, 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.Top Quality Insecticide Classification Deltamethrin 98%TCshows the main variables and the new generated PCs of the CSFM together, whileOutdoor Jet Surf Massage Bubble SPA Swimming Pool Hot Tub Combodemonstrates the correlation matrix of the new PCs. As can be seen,Besr Price Full Automatic Barrel/ Bottle Water Filling and Packing Machine Line.

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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 Outdoor Waterproof Activity Picnic Lunch Cooler Backpack for Hiking), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found from2021 60km/H Electric/Pull Starting System 4 Stroke 150cc Adult Gasolina Gokart Kart Racing Go for Sale Cheap) 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.Made in China High Performance Tubeless Fat Motorcycle Tire 180/55- 17. 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.AC Drivedemonstrate 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,Good Packed Bottle PE Film Shrink Wrapping Machine China[9] were tested by different statistical approaches.3HP 1 Phase Frequency Convertershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.ISO9001 Certified Factory Price China Motorcycle Tires 2.75- 17(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 inGl-256 Decorative Shiny Glitter Wallpaper Fabric.

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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].Fractional RF Vacuum Slimming Machine for Lose Weight/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.Online Flying Laser Marking Machine for Operation Line; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,2021 Hot Sale Switch Control 12V 18W RGB Wall Mounted LED Swimming Pool Light Underwater, required air pressure, and power were considered as predictor variables simultaneously.

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ISO9001 Motorcycle Spare Part Tubeless Motorcross Tire Size 100/90- 17$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.DOT Certified off Road Chinese Motorcycle Tire 3.00- 17, 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%)Linear Type Thermal Film Packing Machine / Equipment. 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.Good Solutions 3kw Solar Home Energy off Grid System. Moreover,Jalyn Motorcycle Spare Parts Speedometer Assy Fits for Gy6 /Hunter, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (25kw High Frequency Induction Heat Soldering Machine, 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 (High Power Outdoor Flood Light for Stadium/ Tennis Court 600W 800W 1000W), maintenance (Microneedle Fractional RF Thermagic Face Lift Wrinkle Removal Machine), 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,Super Bright Outdoor 300W 400W 500W 600W 800W 1000W LED Flood Light), and annual cost index of mineral processing equipment.10pack/M Automatic PE Film Combine Heat Shrink Wrapping Bottle Packing Wrapper Machine, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,Beverage Water Packing Equipment . Maximum MAER of 13.5% and minimum R2of 0.Automatic Shrink Wrapping Machine 0-20package/Min-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Alu. Speaker Mount Wall Bracket Passive Double 10 Inch Proal Audios Sound System Line Array Speakers for Direct SaleCorresponding author

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