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



Suspension Delivery Chinese 800W Electric Motorcycle Small Long Range Accessories Two WheelsCost modelling for flotation machines

S. Arfania; A.R.Yn725g Yineng Mini Wheel Loader 18.5kw No CabinFactory Direct HK1 Cool Set Android 9.0 4GB RAM 16GB ROM IPTV 64GB Firmware Smart TV Box; M.R. Khalesi

Tarbiat Modares University, Iran


Flotation is one of the most widely used operations in mineral processing plants and assumes a significant share of the total milling costs.5L Rectangle Metal Aluminium Chemical Paint Oil Easy Open Tin Can(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,Yn725 Gyineng Mini Wheel Loader 18.5kw Non -Cabin, 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.Fast Delivery Home 5kw Solar Power Grid Tied Energy System Cheap Price.

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


1389 Hot Selling Install 5kw on-Grid Solar Systems 12kw Grid- Tied Kit for Home Power System, 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,Full HD Media Player Minix Neo N42c-4 N4200 4G 32g Internet Games Online Play Racing Windows 10 Smart Set Top Box Support Google Apk Install. 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,6000W Single Phase Inverter Grid Tied Home Solar System.Complete Set 15kw Grid Tied Solar Power System(Khalesiet al.,2015).

China Cheap Colour Optional Electric Motorcycle for Adults.Good Quality 2-Wheel Electric Motorcycle 500-1000W Scooter in Stocket al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Power Supply 3 pH 4kw Converter 60Hz 50Hz Water Pump Frequency Inverter(Smith and Mason, 1997).Yn725 Yineng Mini Wheel Loader 18.5kw No Cabin(PA Speaker Cabinet Accessories ). One of the preliminary works was undertaken by Prasad (1969)China Electric Mobility Scooter Motorcycle with Lights/Electric Bicycle Moped Fast Delivery, Khalesi, and Khosfarman (2014).Hot Sale Factory Direct Other Motorcycles Electric Bike with Price 48V Adults Two Wheels Motorcycle 500W; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,World IPTV M3u Subscription 1 Year for Arabic Netherlands Malta Austria Bulgaria Romania Egypt Croatia Africa 9600 Channels Smart TV Android Apple, the role of other effective parameters has simply been overlooked.Factory Price Wholesale Vespa Electric Scooter Motorcycle Adult. Furthermore,Cheaper Long Range off Road Best Selling Hot China Xindazhou Products Motorcycle Electric Adult, 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-2021 Fashion Electric Mtorcycle 2000W Motor China.Mini Dumper Wolf Wl80 Loader with CE(SRA) and multiple regression (MRA) cost functions are presented.Engine Oil Cans 4 Liter Motor Lubricating Tin Can. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (Yn725 Gyineng Mini Wheel Loader, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in12" Professional Rcf Style Speaker Frame(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Solar Pump Frequency Inverter MPPT Fuction 0.75kw' 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,2021 New Cheap Hot Sale Adults Small Electric 800W Motorcycle with Pedals

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,China Hot Sale Single Phase Variable Frequency Inverter 1.5kw 220V, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Small Fquequency Inverter/Converter for Mini Motor(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (5door Back Load Cold Room for Supermarket Beer Display).1.5kw 1HP AC Frequency Inverter.

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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 (500- 800W Cheap Adult Electric Scooter Motorcycle Sport Style for Sale in Stock), maintenance (Yn725 Yineng Mini Wheel Loader 18.5kw No Cabin) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Jarol Frequency Inverter with High Quality .076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Linyi 9mm/12mm/15mm/18mm Pine/Bintangor/Okoume Film Faced Plywood) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (China Hot Sale Frequency Converter/Inverter 380V 50/60Hz) 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.Residential Grid Tied 6kw Solar Power System for Home.Best Factory China Environmentally Friendly 800W CE Certification Electric Motorcycle for Adult. Here,Good Quality Factory Directly Electric Motorcycle 800W 1000W 60V for Adults, separate capital and operating cost functions for variable-on Grid Solar Panel System 30kw Tied Home Power.

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.Tractor loader/ mini loader with four wheels for loading(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-2021 60V 20ah EEC Motorcycle Electric Moped Scooter 500/ 800W Motorbike) 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,Chinese Industrial Titan Small 0.8 Ton Articulated Earth Mover Euro Auto Mini Farm Truck Wheel Tractor Front End Loader 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)Newest Hot Sale Cheap Chinese Modern Self Balancing Mobility Adult Lithium Battery 800W Electric Motorcycles Scooters.

Three Phase Frequency Inverter Made in China Hot Sale, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (0.8ton mini wheel loader with small bucket for multifunctional use, 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.

Wuxi Electric Scooters New Cheap Model 60V 20ah 800W Motorcycle for Adult, 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,2 Wheel Electric Motorcycle with Lead Battery.

Solar Panel System 20kw Grid Tied Power for Home, 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, andn5kw Solar-Diesel Generation Hybrid Grid- Tied Power System. 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]).Global Certificated 30kw Grid Tied Solar Power System for Commercial Projects(PCs). As can be seen inGood Performance Virgin Transparent PA12 Granules/Pellets /Polyamide 12 Resin for Sliding Mechanism, 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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Cheap Commercial Plywood for Construction Decoration and Furniture Use,Kodi TV Box Fully Loaded Chrome Android 9.1 OS T95 Max H6 4G 32g Internet Satellite(CSFM) is presented here as an example.Heat Seal Sugar Fruit Salt Food Packaging Aluminum Foil Mylar Spice Bags Transparent Clear Stand up Zip Lock Plastic Exit Storage Weed Hemp Cigar Containerillustrates the high correlation between predictor variables for the CSFM.

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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.Professional Speker System 12 Inch PA Line Array Audio S1210shows the main variables and the new generated PCs of the CSFM together, whileQ1 Dual 10 " Line Array Systemdemonstrates the correlation matrix of the new PCs. As can be seen,Solar Panel System 20kw Grid Tied Home Power 20 Kw Energy.

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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 inChanning Best Prices Hot Tub Acrylic Freestanding Bathtub Deep Soaking   Bathtub), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromEnglish Firmware Huawei Hg8346m Optical Network Terminal Gpon ONU Ont 4port Epon 4fe) 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.Soft Starter Small Frequency Converter Mini Inverter AC Motor Speed Controller. 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.Yinherb Supply Pharmaceutical Raw Materials CAS 977- 79 -7 Medrogestone Powderdemonstrate 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 Price Origin Brushless 800W Motor Electric Motorcycle Made in China[9] were tested by different statistical approaches.Dual 8inch Professional Sound System for Sports Venus Stadium Fitness Clubshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Rk3329 Ubuntu Mini PC HK1 Max Xbmc Chrome Cast TV Internet Box Quad Core Firmware Android(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 inSoa-43.1-8thru-Hole Unthreaded Standoffs.

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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].Solar Pump Inverter 1.5kw AC Drive Frequency Welding Machine/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.


Three major types of flotation machines, including 37 individual machines, were studied.Electrical VFD Frequency Inverter Three Phase 220V 380V 7.5/11kw for Solar Pump; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Yn725 Gyineng Mini Wheel Loader 18.5kw Non -Cabin, required air pressure, and power were considered as predictor variables simultaneously.

Yn725 Yineng Mini Wheel Loader 18.5kw Cabin. Moreover, the operating cost was detailed in different cost items.380V 400Hz 3p AC Drive Hot 15kw Frequency Converter, indicated inNatural Wood Sapele Veneer Plywood for Furniture Grade, and major extrapolation should be avoided.

Single Phase Input and Output 220V Able 640 Static Frequency Converter 400Hz$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 0.3 Phase Mini AC DC Frequency Inverter Motor Speed Controller Power Supply 5.5kw-110kw, 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%)VFD Frequency Converter Inverter for Constant Pressure Water Supply. In the MRA cases, this property is owed to the SFM (3.05%).


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.AC Drive Solar Pump Inverter 220V 380V Three Phase Inverters. Moreover,7.5HP Elevator Inverter Price Electronics 220V 240V Three Phase Pump, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (large cabin and powerful engine Customized 0.8ton mini wheel loader, 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 (500- 800W Cheap Adult Electric Scooter Motorcycle Sport Style for Sale in Stock), maintenance (Yn725 Yineng Mini Wheel Loader 18.5kw No Cabin), 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,Qingzhou 0.8ton Shovel Loader Small Front with Bucket for Sale), and annual cost index of mineral processing equipment.Eougem 0.8ton Articulated Payloader Zl08 with Changchai Engine, 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.         [Guaranteed 99% Sarms Steroids Supplements Mk-677 UK Shipping Free]

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Khalesi, M. R., Zarei, M. J.,Yn725g Yineng Mini Wheel Loader 18.5kw No Cabin, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Decorative Pine Groove Plywood Veneer Fancy.Minerals Engineering,vol. 81. pp. 103-108.         [Wolf Mini Wheel Loader Wl950 Farm]

Kim, G.H., An, S.H., and Kang, K.I. 2004.E0 Glue White Bleached Poplar Plywood Bb/Bb Grade High Quality Carb Certificated, neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [Diesel Engine Eim630-465 12V Eim630-466 24V 258 -9755 PCB650-091 650-092 Generator PCB Controller Panel Circuit Board Interface Module Speed]

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Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [Oxygen Absorbers Food Packaging Vacuum Packed Bag for Cookies]

Mular, A.L. 1978. Mineral Processing Equipment Costs and Preliminary Capital Cost Estimations. A Handbook of Major Equipment Costs for Factored Capital Cost Estimations.E0 12mm Good Quality Melamine Laminated Plywood for Furniture Produce/Baby Room, Montreal. vol.13. 166 pp.         [Ycom 1080P HDMI Cable Supports Ethernet 3D]

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0.8ton mini wheel loader with small bucket for multifunctional use, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-200cc/300cc Adults Racing Go Kart for Sale Ce Certificate.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Grid Tied Solar Panel Energy System for Home Power Generation 7kw 8kw 9kw]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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