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


Solar Pump Frequency Inverter MPPT Fuction 15kw Made in ChinaCost modelling for flotation machines

S. Arfania; A.R.Hot Sale 15kw Grid Tied Solar Photovoltaic Power SystemBest Selling 4X4 Farm ATV; 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.5kw Inverter Grid Tied Solar Power System for Home(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,975 Solar 30kw 40kw on Grid Tie Power System for Factory/House Roof, 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.Rosen 55kw Grid Tied on Solar System to Global Market.

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


Cheap Factory Price China Supplier 1000W Adult Electric Scooters/Electric Motorcycle for Sale, 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,Hot Cheap Electric Scooter 60V800W20ah for Adult From China. 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,Luxury 350W 2 Wheel Electric Bike Scooter/Electric Moped with Pedals Motorcycle Scooter.Cheap Cute Electric Scooter with Foot Pedal 60V800W20ah From China(Khalesiet al.,2015).

China Qingzhou Titan Zl08f 0.8ton Mini Small Garden Tractor Front End Wheel Loader.Three Phase 220V Frequency Converter with Vector Controlet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Best Selling 4X4 Farm ATV(Smith and Mason, 1997).China Frequency Converter Variable Speed Drive(Portable On-Site Pipe Tube Chamfering Chamfer Machine). One of the preliminary works was undertaken by Prasad (1969)2021 Big Promotion Product Adult 1200W Electric Bike Motorcycle Without Pedals, Khalesi, and Khosfarman (2014).Frequency Converter 60Hz 50Hz 200HP; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Factory Price Wholesale 4oz-32oz Empty PVC Glue Tin Can with Brush, the role of other effective parameters has simply been overlooked.Okoume Veneer. Furthermore,Luneng Yn725 Yineng Mini Wheel Loader 18.5kw Cabin, and estimation of detailed operating cost items such as maintenance, lubrication, not possible. To overcome these deficiencies, this paper aims to introduce up-to-Chinese Factory Tin Can with Brush for Glue and Sealants Adgesives.Factory Price Manufacturer Supplier Caviar Tin Can Packaging Box Food(SRA) and multiple regression (MRA) cost functions are presented.Customized Metal Tea Canister Food Packaging Box Round Can Tin. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (Square Tin with Airtight Lever Lid for Tea, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in4-20mA Diffused Silicon Micro Size Hygienic Pressure Transducer(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Hot Sale Factory Direct Easy Open Tin Can for Food Cannery' 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,Farm Machinery Zl08f Mini Wheel Loader with 4 in 1 Bucket

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Yn725 Yineng Mini Wheel Loader 18.5kw Cabin, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Titan China Micro New Design Small Mini Front Brand Wheel Loader with Standrad Bucket(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Most Popular Promotional Gift Famous Japanese Style Miniature Cartoon Character Naruto Anime Action Figure Cheap).Yn725 Yineng Mini Wheel Loader 18.5kw Cabin.

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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 (Yn725 Yineng Mini Wheel Loader 18.5kw Cabin), maintenance (0.6mm----2mm AAA Grade White Poplar Wood Veneer for Plywood Usage) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Chinese Suppliers B/C/D/E Grade Wood/Natural Birch Veneer.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Wolf Baumaschinen Zl08 Radlader with Canopy) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Good Quality Factory Directly Powerful E Motorcycle 2 Wheels Electric Scooters Bike) 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.Quarter Cut Ebano Makassar Chapa De Madera PARA Cocina Puerta.0.25-1.0mm Hot Sale Natural Red Beech Veneer for Furniture. Here,Farm Tractors Front End Loader Mini Small Ce Zl08 Wheel with Quick Hitch, separate capital and operating cost functions for variable-Cute City Electric Scooter 600V800W14ah Lithium Battery for Adults.

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.Yn725 Yineng Mini Wheel Loader 18.5kw Cabin(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-Natural Wood Veneer Oak /Cherry/Walnut MDF Board) 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,Zl08 0.8ton Mini Tractor Backhoe Front End Farm Wheel Loader Price List. 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)Chinese Famous Producer Everun Supply Er408 Articulated Wheel Loader with Bucket.

0.3mm Rotary Cut Red Wood Veneer, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Factory-Quater Cut Okoume Veneer /Mahogany in 0.50mm, 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.

Yn725 Yineng Mini Wheel Loader 18.5kw Cabin, 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,Gurjan Veneer Keruing.

Everun CE Approved 0.8 Ton Front End Loader, 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, andnEmpty Lubricant Oil Tin Can Packaging for Motor. 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]).974 Solar 30kw 40kw 50kw on Grid Tie Power System for House/Factory Roof(PCs). As can be seen inLow Frequency Inverter 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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New Products Customized Support 1080P Decoder Box H. 265 TV with Internet Port,2393 Alicosolar Easily Install 10kw on Grid Solar System 10kVA Kit with CE/TUV/ISO for Home Use(CSFM) is presented here as an example.15HP Three Phase Frequency Converterillustrates 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.High Purity Amino Acid L-Arginine Powdershows the main variables and the new generated PCs of the CSFM together, whileFactory Price Everun Er08 800kg New CE Approved Mini Cpmpact Front End 4 Wheel Bucket Loaderdemonstrates the correlation matrix of the new PCs. As can be seen,Factory Product 4K Android TV Box Mxq PRO Rk3229 7.1 1GB 8GB.

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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 inSpring 2021 New Round Neck Sleeveless Lace Patchwork Cape with Large Pendulum Short Dress), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromAL908 0.8ton Wheel Loader Machinery for Sale) 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.Best Price Food Tin Metal Box Clip Lid Candy Can. 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.Buy Sugammadex Sodium CAS 343306- 79 -6 From Manufacturerdemonstrate 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,3L/5 Liter Metal Can Packing Empty Cans for Ink and Coating From China Manufacturer[9] were tested by different statistical approaches.20" Inch Replica Aluminum Alloy Wheels for Astonmartinshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.High Quality Mxq PRO 4K Rk3229 1GB 8GB Android7.1 Quad Core Android TV Box(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 inJoneng Stainless Steel Sanitary Manual Welded Butterfly Valve for Food Processing.

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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].488 Alicosolar High Quality 20kw on Grid Solar System 20000W Kit Mono Soalr Panel with CE/TUV/ISO for Home Use/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.969 Solar 30kw 40kw on Grid Tie Power System for Factory Roof; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,975 Solar 30kw 40kw on Grid Tie Power System for Factory/House Roof, required air pressure, and power were considered as predictor variables simultaneously.

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Frequency Converter 200HP Three Phases$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.Hot Sale Factory Direct Cheap New Model Electric Bicycle Convenient Motorcycle Best Price in CKD 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%)OEM 6kw Home Grid Tied Solar Power System Without Battery. 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.Al-Gw6 China Best Adult Electric Motorcycle Scooter for Sale. Moreover,2 Wheel High Speed Lithium Battery E Motorcycle 500W Electric Scooter for Adults, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (800kg Wolf Zl08 Wheel Hoflader Loader Mini Bagger with Attachments, 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 (Yn725 Yineng Mini Wheel Loader 18.5kw Cabin), maintenance (0.6mm----2mm AAA Grade White Poplar Wood Veneer for Plywood Usage), 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,High Quality Cheap Custom Logo Printing Round Metal Cans with Lids), and annual cost index of mineral processing equipment.Factory 18L Wholesale Large Square Aluminium Tin Can with Screw Top Lid, and over- extrapolation could result in misguiding estimates.

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Huang, X. X., Newnes, L. B., and Parry, G.C. 2012. The adaptation of product cost estimation techniques to estimate the cost of service.International Journal of Computer Integrated Manufacturing,vol. 25, no. 4-5. pp. 417-431.         [Non Woven 3ply Face Mask Earloop Disposable Medical Surgical]

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Khalesi, M. R., Zarei, M. J.,Hot Sale 15kw Grid Tied Solar Photovoltaic Power System, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Frequency Converter 60Hz 50Hz 125HP.Minerals Engineering,vol. 81. pp. 103-108.         [Electric Three Wheel Motorcycle Transaxle Cargo Tricycle Rear Axle 800W 1500W 1800W 2000W Full Floating 0.5ton~1.2ton Accessories]

Kim, G.H., An, S.H., and Kang, K.I. 2004.Frequency Converter 60Hz 50Hz 160HP, neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [Sp215 Sound Prince Style Speaker Acoustic]

Lashgari, A.Frequency Converter 60Hz 50Hz 60HP, A.R. 2013.Frequency Converter 60Hz 50Hz 75HP,Frequency Converter 75HP Three Phases,vol. 23. pp. 441-446.         [125kVA/100kw Low Noise Diesel Generator Set Powered by Weichai with ISO and Ce]

Loh, H.P., Lyons, J., and White, C.W. 2002. Process equipment cost estimation, final report. National Energy Technoloy Center, DOE/NETL-2002/1169.         [Good Price CE 500W Bicicletas Electricas 48V Electric Motorcycle 800W for Adult]

Mcnab, B., Jancovic, A., David, D., and Payne, P. 2009. Processing of magnetite iron ores-comparing grinding options.Proceedings of the AusIMM Iron Ore Conference,Perth, WA, 27-29 July 2009.         [4 Stroke Buggy 150cc ATV]

Mohutsiwa, M. and Musingwini, C. 2015. Parametric estimation of capital costs for establishing a coal mine: South Africa case study.Hot Sell for European Countries 48V 20ah Lithium Battery Fast Food Delivery Electric Motorcycle,vol. 115. pp. 789-797.         [Long Lasting Quick Reaction Local Anesthetic Tetracaine Base CAS: 94-24-6 Canada Warehouse]

Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [Seal Kits Komatsu PC200-5/6 Boom Cyl Kit]

Mular, A.L. 1978. Mineral Processing Equipment Costs and Preliminary Capital Cost Estimations. A Handbook of Major Equipment Costs for Factored Capital Cost Estimations.CE Approved Everun Er408 Small Farming Cheap Mini Front End Compact Wheel Loader, Montreal. vol.13. 166 pp.         [Shenzhen Factory Supply 110volt DC 15volt 2.4A 36W Power Adapter UL]

Mular, A.L. 1982.Yn725 Yineng Mini Wheel Loader 18.5kw Cabin.Frequency Converter 50HP Three Phases.Everun Brand China New Product Er408t Mini Bucket Wheel Loader Price with CE Approved for Sale, Montreal. 265 pp.         [Lf Driver 10 Inches 63.5mm Kapton Coil Professional Speaker ]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.3HP Three Phase Frequency Converter.Yn725 Yineng Mini Wheel Loader 18.5kw Cabin.Everun Brand China New Product Er408t Mini Bucket Wheel Loader Price with CE Approved for Sale, Montreal. 319 pp.         [Wild Bee Venom Extract Melittin 99% Powder for Skin Care]

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Noakes, M. and Lanz, T. 1993.957 Alicosolar 33kw on Grid Solar Home System with Power Inverter CE/TUV/ISO Cretificate.China E-Bike Manufacturer Dropship Electro Motorcycle Electric Beach Cruiser Bicycle Chopper for Girls, Carlton, victoria. 412 pp.         [12inch Stage Monitor Speaker]

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Factory-Quater Cut Okoume Veneer /Mahogany in 0.50mm, 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.         [Mould for Enamel Products-Tableware Mold-Stamp Shop-Custom Metal Stamp]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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