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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

Yn725g Yineng Mini Wheel LoaderCost modelling for flotation machines

S. Arfania; A.R.250cc 150cc China Enclosed Cabin Tricycle Three Wheel Motorcycle with Cooling Box Container for Sale20 mm 20mm PVC Pipe Machine; 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.Automatic High Effective Medical Ultrasound Bone Densitometer (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,New 50cc Monkey Bike Gasoline Motorcycle Euro 4, 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 250cc New 3 Wheel Motorcycle Motor Tricycle.

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


Introduction

3ru 24 in 1 CATV Fixed Channel Modulator , 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,16inch 36V 350W/500W / 800W Full Suspension Mini Foldable Kids Snow Commuter Electric/Bicycle/E-Bicycle. 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,Satellite Ts Encryption HD Receiver with Multiplexing Function.Motor Tricycle Three Wheel Cargo Trike for Sale(Khalesiet al.,2015).

Motorbicycle for Well Done Accessories.16 in 1 CATV Modulator Fixed Frequencyet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Plastic Green Color Masterbatch(Smith and Mason, 1997).8 Channels HDMI to DVB-T Modulator(Nordic Leather Sofa Modern Simple Three Seats). One of the preliminary works was undertaken by Prasad (1969)Medical Equipment Ho-200 Ophthalmic a/B Ultrasound Scanner, Khalesi, and Khosfarman (2014).Motor Vehicle for High Speed and Stable Function; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Outdoor 750MHz One Way CATV Trunk Amplifier , the role of other effective parameters has simply been overlooked.China Enclosed Ice Cream Tricycle Three Wheel Cargo with Cooling Box. Furthermore,New Racing 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-Cheap 3 Wheel Cargo Tricycle with Box .Clinical Equipment Portable Ultrasound Bone Densitometer for Hospital(SRA) and multiple regression (MRA) cost functions are presented.Motorcycle for 1405mm of Wheel Base. 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 (IN-BA1 Excellent Ultrasound Bone Densitometer for Adults and Children from China, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inPin Machine Suppliers Marker Systems(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;5150-5850MHz Sector Panel Antenna with 2*16dBi Gain for Best Design' 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,Ho-100 Ophthalmic Ultrasound a Scan Pachymeter

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Sy-AC51 Best Price 128 Elements Wireless Probe with Color Doppler, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Innopack 1L Square Engine Oil Tin Can with Screw Cap Manufacturer(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Loft Style Dimmable LED Filament Bulb Lamp E12 E14 2700k 110V 220V C35 C35t Clear 4W 6W Warm White Light).1L Round Tin Pail with Sealed Lid and Plastic Handle for Paint Use.

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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 Antenna High Gain 29dBi), maintenance (2.4- 5GHz MIMO Omni Antenna with 2.4G Network System) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Sector Antenna 5GHz.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Mini Wheel Loader Small Dumper Hoflader Wolf Zl08) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (2.4G- 5GHz Fiberglass Omni Antenna with 8dBi Gain WLAN/WiFi) 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.2.4- 5GHz MIMO Omni Antenna with 11dBi.2.4- 5GHz Omni Antenna . Here,E-3/L-3 Loader Carry-Scraper Bulldozer/Pushdozer Forklift OTR/off-The-Road Tyre/Tire 29.5-25, separate capital and operating cost functions for variable-1L Tin Can for Oil.

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.Trade Peak Lowest Price for 150cc ATV(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-L-Guard Factory L-5 OTR Tires 23.5-25 P. R. 20) 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,2021 New China Adult Tricycle Motor Cargo 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)Wholesale China High Quality OTR Tyre 17.5-25 G2 Pattern..

Suzhou Innopack 1L Metal Rectangular Tin with Screw Cap in Low Price, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Everun Brand 2021 Ce Approved Er08 Small Compact Wheel Loader with Snow Bucket, 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.

2021 New Model 125cc 150cc Ce Approval off Road ATV, 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,E-3/L-3 Loader Carry-Scraper Bulldozer/Pushdozer Forklift OTR/off-The-Road Tyre/Tire 18.00-25.

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whereCeis the estimated cost,Cathe actual cost, andnZl08 800kg China Articulated Mini Small Compact Front End Wheel Loaders with Ce. 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]).Chinese Cheap 800kg Zl08f Garden Mini Small Compact Avant Wheel Front End Loader with Ce(PCs). As can be seen inTUV Ce IP67 1000VDC 30A Male and Female 8mm2 Mc4 Connectors for Solar PV System, 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.500- 800W Cheap Adult Electric Scooter Motorcycle Sport Style for Sale in Stockshows the main variables and the new generated PCs of the CSFM together, whileVrx932la Compact Line Array Speaker Systemdemonstrates the correlation matrix of the new PCs. As can be seen,L5 Nylon Mining Loader OTR Tyre 20.5-25 off-The-Road Tire.

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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 inExport of diapers for disposable babies to Turkey / Dubai Korea United Arab Emirates South Africa Guangzhou Indonesia Europe USA India), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromRotary Cut Bintagor Veneer for Panels and Furniture with Good Price) 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.Lithium Polymer Battery Mica 3.7V Mc602540 550mAh Li Pack for Electronic Device. 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.Yn725 Yineng Mini Wheel Loader 18.5kw Cabindemonstrate 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 Model High Quality 4 Stroke LED Efi 50cc 100cc 110cc Gasoline Scooter Gas Moped Super Soco Bike Mini[9] were tested by different statistical approaches.DC 1000V Mc4 Cable Connectors shows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Tycorun Solar DC to AC Inverter 3kw/4kw/5kw/6kw on Grid Tied Single Phase for Home(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 inThreaded Standoffs for Sheets as Thin as. 025 Types Tso.

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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].Eougem Mini 0.8 Ton Front End Loader of Good Quality 25kw/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.Grid Tied Microinverter 1200W Waterproof Pure Sine Wave with WiFi Monitoring; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,New 50cc Monkey Bike Gasoline Motorcycle Euro 4, required air pressure, and power were considered as predictor variables simultaneously.

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25KW Ground Mini loader price$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.Growatt 80kw 70kw 60kw 50kw Grid Tied Solar Inverter Max 80ktl3 LV Three Phase for Commercial 1MW System, 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%)Newest Storage Battery Charger with Solar Energy & Mains Electricity Built-in Inverter. 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.Yn725 Yineng Mini Wheel Loader 25kw. Moreover,No Flicker Glare High Purity 18W Underwater LED Swimming Pool Light with Edison Chip, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Yn725 Wheel Loader 25kw Mini, 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 Antenna High Gain 29dBi), maintenance (2.4- 5GHz MIMO Omni Antenna with 2.4G Network System), 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,CE OEM ISO SGS Zl08 800kg Articulated Compact Shovel Mini Wheel Loader with Changchai Engine 25kw), and annual cost index of mineral processing equipment.2.4- 5GHz MIMO Omni Antenna, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,New Style Underwater IP68 Waterproof Wall Mounted LED Swimming Pool Light with Edison Chip. Maximum MAER of 13.5% and minimum R2of 0.off Grid Tied Solar Inverter 10kw 15kw 20kw 30kw 50kw 100kw 200kw 500kw 3phase-feasibility and even feasibility study level of projects.

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Lashgari, A.AC12V RGB Mini PC Resin Filled Wall Mounted LED Swimming Pool Light, A.R. 2013.12V AC Warm White PC Mini Flat Resin Filled LED Pool Light,Medical Equipment Portable Automatic High Effective Ultrasound Bone Densitometer,vol. 23. pp. 441-446.         [Freesub Sublimation Glass Picture Frame for Heat Press Transfer]

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Mular, A.L. and Poulin, R. 1998. Capcosts 1998.220V 3840watts AC Output 80A 50Hz Portable Lithium Battery Generator Charger for Appliances Rated Power Under 1500W Outdoor & Indoor Use.Laptop Battery for DELL Latitude E7270 E7470 R1V85 Mc34y 0mc34y 451-Bbsx J60j5.4GB32GB 4K Android TV Box Digital Display T95X2 with Amlogic S905X2 Internet Quad Core CPU Media, Montreal. 319 pp.         [Dust Collector Machine Wood]

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Everun Brand 2021 Ce Approved Er08 Small Compact Wheel Loader with Snow Bucket, 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.         [Organic High Absorbency Factory Price Baby Disposable Diaper with Super Soft Cotton]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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