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



10kw Complete Set Solar Power Systems on-Grid for Home/ Industrial/Commercial RoofCost modelling for flotation machines

S. Arfania; A.R.Hot Cheap Electric Scooter 60V800W20ah for Adult From ChinaCheap Price Zl08 0.8ton China Mini Articulated Hydraulic Front End Tractor Loaders; 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.Luxury 350W 2 Wheel Electric Bike Scooter/Electric Moped with Pedals Motorcycle Scooter(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,Cheap Cute Electric Scooter with Foot Pedal 60V800W20ah From China, 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 Qingzhou Titan Zl08f 0.8ton Mini Small Garden Tractor Front End Wheel Loader.

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


Three Phase 220V Frequency Converter with Vector Control, 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,China Frequency Converter Variable Speed Drive. 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,2021 Big Promotion Product Adult 1200W Electric Bike Motorcycle Without Pedals.Frequency Converter 60Hz 50Hz 200HP(Khalesiet al.,2015).

Factory Price Wholesale 4oz-32oz Empty PVC Glue Tin Can with Brush.Okoume Veneeret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 10 Inch Coaxial Speaker Professional Driver 250wrms " Line Array Church Sound Equipment(Smith and Mason, 1997).Luneng Yn725 Yineng Mini Wheel Loader 18.5kw Cabin(Recycle Stand up Pouch Zip Lock Dried Biodegradable Kraft Paper Bag Food Packaging Manufacturers). One of the preliminary works was undertaken by Prasad (1969)Chinese Factory Tin Can with Brush for Glue and Sealants Adgesives, Khalesi, and Khosfarman (2014).Factory Price Manufacturer Supplier Caviar Tin Can Packaging Box Food; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Customized Metal Tea Canister Food Packaging Box Round Can Tin, the role of other effective parameters has simply been overlooked.Square Tin with Airtight Lever Lid for Tea. Furthermore,Hot Sale Factory Direct Easy Open Tin Can for Food Cannery, 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-968 Solar 30kw 40kw on Grid Tie Power System for Factory Roof.0.15mm Rosewood Veneer(SRA) and multiple regression (MRA) cost functions are presented.Interior Decorative Woven Veneer Customized Style. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (4WD Wheel Loader Manufacture Small Radlader 1.0 Ton Mini780, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inVegetable and Fruit Fertilizer Crystal Caprolactam Grade Ammonium Sulphate(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Farm Machinery Zl08f Mini Wheel Loader with 4 in 1 Bucket' names:

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Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Chinese Suppliers B/C/D/E Grade Wood/Natural Birch Veneer, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Wolf Baumaschinen Zl08 Radlader with Canopy(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Express FedEx with Cheap Cost to Belgium).Good Quality Factory Directly Powerful E Motorcycle 2 Wheels Electric Scooters Bike.

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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 (Quarter Cut Ebano Makassar Chapa De Madera PARA Cocina Puerta), maintenance (0.25-1.0mm Hot Sale Natural Red Beech Veneer for Furniture) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Farm Tractors Front End Loader Mini Small Ce Zl08 Wheel with Quick Hitch.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Cute City Electric Scooter 600V800W14ah Lithium Battery for Adults) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Yn725 Yineng Mini Wheel Loader 18.5kw Cabin) 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.Natural Wood Veneer Oak /Cherry/Walnut MDF Board.Zl08 0.8ton Mini Tractor Backhoe Front End Farm Wheel Loader Price List. Here,Chinese Famous Producer Everun Supply Er408 Articulated Wheel Loader with Bucket, separate capital and operating cost functions for variable-0.3mm Rotary Cut Red Wood Veneer.

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.Factory-Quater Cut Okoume Veneer /Mahogany in 0.50mm(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-Yn725 Yineng Mini Wheel Loader 18.5kw Cabin) 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,Gurjan Veneer Keruing. 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)Everun CE Approved 0.8 Ton Front End Loader.

Empty Lubricant Oil Tin Can Packaging for Motor, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (974 Solar 30kw 40kw 50kw on Grid Tie Power System for House/Factory Roof, 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.

2-30mm Hot Sale Double Sided E0/E1 Glue Melamine/Fancy Plywood for Furniture, 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,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, 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, andnFactory Product 4K Android TV Box Mxq PRO Rk3229 7.1 1GB 8GB. 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]).970 Solar 30kw 40kw on Grid Tie Power System for Factory Roof(PCs). As can be seen in100% Passing The Customs Europe Free Shipping BMK Glycidate 16648-44-5, 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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3L/5 Liter Metal Can Packing Empty Cans for Ink and Coating From China Manufacturer,High Quality Mxq PRO 4K Rk3229 1GB 8GB Android7.1 Quad Core Android TV Box(CSFM) is presented here as an example.Best Chemical Supplier Niche Customs Guaranteed New BMK Powder CAS: 5413-05-8illustrates 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.Retinoic Acid CAS 302- 79 -4 in Stockshows the main variables and the new generated PCs of the CSFM together, whileDouble 10'' Compact Active Line Arraydemonstrates the correlation matrix of the new PCs. As can be seen,High Efficicency Roof Mounting Grid Tied Home Solar Energy System.

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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 inWaterproof makeup pouch cosmetic bag clear PVC organizer with zipper), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromComplete Set 15kw Grid Tied Solar Power System) 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 0.969 Solar 30kw 40kw on Grid Tie Power System for Factory Roof. 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.Fatory Supply Thiosemicarbazide CAS 79 -19-6demonstrate 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,2021 Factory New Electric Bicycle Hot Sale Cool Sport Motorcycle Made in China[9] were tested by different statistical approaches.Erbium-Doped Fiber Amplifier Optical Power Adjustable shows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Rosen 9kw Grid Tied on Solar System to Global Market(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 inZh-780g Small Cold Glue Corrugated Box Machine.

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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].Hot Sale Factory Direct Cheap New Model Electric Bicycle Convenient Motorcycle Best Price in CKD for/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.OEM 6kw Home Grid Tied Solar Power System Without Battery; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Cheap Cute Electric Scooter with Foot Pedal 60V800W20ah From China, required air pressure, and power were considered as predictor variables simultaneously.

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800kg Wolf Zl08 Wheel Hoflader Loader Mini Bagger with Attachments$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.High Quality Cheap Custom Logo Printing Round Metal Cans with Lids, 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%)Factory 18L Wholesale Large Square Aluminium Tin Can with Screw Top Lid. 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.Hot Sale Factory Direct Colorful Electric Motorcycle for Passenger Made in China. Moreover,Cheap Electric Bike 1000W Brushless Disabled Chainless Portable Motorcycle City, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Square Engine Oil Tin Can with Screw Cap Manufacturer Lid, 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 (Quarter Cut Ebano Makassar Chapa De Madera PARA Cocina Puerta), maintenance (0.25-1.0mm Hot Sale Natural Red Beech Veneer for Furniture), 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,Frequency Converter 60Hz 50Hz 150HP), and annual cost index of mineral processing equipment.Frequency Converter 60Hz 50Hz 125HP, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,Frequency Converter 60Hz 50Hz 160HP. Maximum MAER of 13.5% and minimum R2of 0.Frequency Converter 60Hz 50Hz 60HP-feasibility and even feasibility study level of projects.


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Khalesi, M. R., Zarei, M. J.,Hot Cheap Electric Scooter 60V800W20ah for Adult From China, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Hot Sell for European Countries 48V 20ah Lithium Battery Fast Food Delivery Electric Motorcycle.Minerals Engineering,vol. 81. pp. 103-108.         [High Back Executive Boss Single Office Sofa Swivel Reception Chair]

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Lashgari, A.Yn725 Yineng Mini Wheel Loader 18.5kw Cabin, A.R. 2013.Frequency Converter 50HP Three Phases,Everun Brand China New Product Er408t Mini Bucket Wheel Loader Price with CE Approved for Sale,vol. 23. pp. 441-446.         [New free good size baby diaper design xl]

Loh, H.P., Lyons, J., and White, C.W. 2002. Process equipment cost estimation, final report. National Energy Technoloy Center, DOE/NETL-2002/1169.         [RC Factory Supply Chemcial Disodium Glycyrrhetate Powder with CAS 71277- 79 -7 as Food Additives]

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.         [Single 15" Plastic Powered Speaker]

Mohutsiwa, M. and Musingwini, C. 2015. Parametric estimation of capital costs for establishing a coal mine: South Africa case study.3HP Three Phase Frequency Converter,vol. 115. pp. 789-797.         [100% Water Soluble Vitamin a Palmitate Powder Retinyl]

Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [Mylar Custom Printed Plastic Weed Bag Stand up Pouch with Zipper]

Mular, A.L. 1978. Mineral Processing Equipment Costs and Preliminary Capital Cost Estimations. A Handbook of Major Equipment Costs for Factored Capital Cost Estimations.Yn725 Yineng Mini Wheel Loader 18.5kw Cabin, Montreal. vol.13. 166 pp.         [OEM Cosmetics Nail Art Beauty UV Gel Products Nails Polish Printer Tips]

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Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Zl08 0.8t Hot Sale Small Yard Loader Mini Tractor Front End.Wl80 Mini Loader with Yanmar Engine.China E-Bike Manufacturer Dropship Electro Motorcycle Electric Beach Cruiser Bicycle Chopper for Girls, Montreal. 319 pp.         [D&B Style Dual 10 Inch Compact Line Array ]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Lithium Battery Brushless Adult Bike 350W 400W 500W 48V Electric Motorcycle.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [Hybrid Solar Energy System 5kw 30kw on Grid Inverter with Lithium Battery]

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974 Solar 30kw 40kw 50kw on Grid Tie Power System for House/Factory Roof, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Zl08 800kg China Small Garden Tractor with Front Loader Yard.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [500kw on Grid Tied Hybrid Solar Power Plant Station System]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

ISY SDC TCM ID Mounted Pipe Beveling MachineScarlet/ Violet / Purple/ Golden/Green Pigment PasteCorresponding author

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