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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

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Automatic Thermostatic Vulcanizer for Sale Cost modelling for flotation machines

S. Arfania; A.R.2021 Hot Sale 18W RGB Resin Filled LED Surface Mounted Underwater Pool LightNew 110cc 125cc 150cc Mini Jeep Willys; 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.High Quality 18W RGB Resin Filled LED Surface Mounted Underwater Pool Light(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,150cc Gasoline Scooter with Efi ECU Delphi. Rongmao Efi., 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.High Performance Motorcycle Tire for Senegal .

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


Introduction

Double Rear Tyre Tricycle with 300cc Water Cooling Engine, 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,300cc Gas Aluminum Adult Tricycle Reverse Truck Cargo . 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,Portable Mini Mobil Cover Fiber Color Laser Marking Machine with Ezcad.12" Mono Base Hair Topper Best Quality Virgin Remy Human #4 Chocolate Brown Straight Real Hairpieces Factory Wholesale Price Accessories(Khalesiet al.,2015).

300cc Five Wheel Gas Cargo 3 Motorcycle for Adults .Portable Automatic Ultrasound Bone Analyzer Densitometeret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for White Powder Vitamin a for Food and Feed Grade(Smith and Mason, 1997).300cc New Classic Cheap Cargo Tricycle (Custom Water Proof Child Resistant Food Grade Plastic Aluminum Laminated Stand up Container Bag). One of the preliminary works was undertaken by Prasad (1969)Voomaster Brand Big Diamonds Tread Pattern Motorcycle Tyre 3.00- 17 , Khalesi, and Khosfarman (2014).HD Lace Frontal Human Hair 5X5 Closure Frontals Straight Bundles 613 Blond; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Ophthalmic Pachymeter , the role of other effective parameters has simply been overlooked.6A Grade Indian Beard. Furthermore,Pneumatic Electric Portable Truck Car Frame Beam Metal Coding Machine Marking Coder, 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-50W LED Bulb Marking.50W Fiber Laser Marking Machine for PVC/ Plastic/ Stainless Steel/ Silicon(SRA) and multiple regression (MRA) cost functions are presented.Flexible Label Laser Marking Machine for Airbag Warning Labels. 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 (WiFi Wireless Ultrasound Linear Color Doppler USB 192 Elements Probe, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inSrx715 High Quality Neodymium PRO Audio(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Factory Customized Automobile Automotive Vehicle Parts Electric Drive and Motor Shaft' names:

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The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),1L Rectangular Olive Oil Tin 1800ml Packaging with Imported Plastic Spout Guangdong(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (SMD Full Color P6 Indoor LED Display Cube Screen).1L Metal Resealable Selable Paint Tin Cans for Glue and Chemical 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 (4u 16 in 1 Agile CATV RF Modulator Channels), maintenance (Thinner Plain Color 1L Metal Can with Screw Cap) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Customized 1L Round Empty Metal Oil Paint Package Tin/Can Container.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (HDPE Pesticide Bottle 500ml 1L Foliar Fertilizer Plastic) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Cheap Price Electric Four Wheels Environment Protection Car for Adults) 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.Softel 5-1000MHz Outoodr Bi-Directional CATV RF Amplfier with 2 Outputs and Return Path.Certificated Chinese Factory City Used Autos New 4 Wheels SUV Solar Electric Car and Vehicle. Here,Softel CATV House Amplifier Gain Forward Max 30 dB with Return Path 5-65MHz, separate capital and operating cost functions for variable-Gain 30dB 1 Output CATV House User Amplifier with AGC.

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.Softel 24 Channel Optional RF Fixed Analog Modulator(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-Cummins diesel engine 4918416 inline 5 diagnostic tool datalink adapter) 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,Solar Energy System 3kwh Power Home Built in Inverter. 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)High Quality 3kwh Rechargeable LiFePO4 Lithium Battery.

Automatic Thermostatic Vulcanizer for Sale , the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (BMW N63 S63 Camshaft Alignment Tool Set , 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.

Gy6 -125 Spark Plug Cap OEM Quality Motorcycle Parts, 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,2021 High Quality Marine 1400W Hybrid Power Inverter Solar System Portable with 3kwh Lithium Battery.

Motorcycle Scooter Rear Clutch Assembly for Gy6 -90 Engines, 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, andnMotorcycle Parts Speed Cable for Gy6 -150. 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]).Powder Metallurgy Hot Press Sintering Furnace(PCs). As can be seen inFree Sample Custom Printing Stand-up Food Packaging Zipper Plastic Bag Kraft Film Laminated Ziplock, 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.Engine 150cc China 3 Wheel Motor Tricycle Chinese Commercialshows the main variables and the new generated PCs of the CSFM together, whileMassage Lymphatic Drainage Body Shaping Slimming Beauty Apparatusdemonstrates the correlation matrix of the new PCs. As can be seen,300cc Triciclo Con Cabina.

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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 in925 Silver Fashion Jewelry Bracelet B004), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromAC Drive Frequency Variable General Power Supply Solar Motor Pump) 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.High accuracy stability Monocrystalline Silicon Pressure Transmitter. 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.10 Inch Coaxial Speaker Professional Driver 250wrms Line Arraydemonstrate 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,Discount High Strength 90/90-19 Motorcycle Tyre/Tire[9] were tested by different statistical approaches.St-2kw 230V/50Hz Single Phase Brush Alternator for Saleshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.New Pattern Best Price 110/90- 17 Motorcycle Tire(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 inLapel Pins.

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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].2021 Hot Sale 18W 12V High Power Swimming Pool Lighting Water Proof Lights 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.

Discussion

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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.Ophthalmic Ultrasonic Pachymeter and Biometer. Moreover,2D Echo Color Doppler Ultrasound Scanner Diagnostic Equipment, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (2021 New Arrival Malaysian Eyebrow, 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 (4u 16 in 1 Agile CATV RF Modulator Channels), maintenance (Thinner Plain Color 1L Metal Can with Screw Cap), 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,18" Remy Hair Lace Front Closure Natural Color Body Wave), and annual cost index of mineral processing equipment.250ml 500ml 750ml 1L Fancy Small Cooking Oil Tin, and over- extrapolation could result in misguiding estimates.

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Lashgari, A.China High Quality Ut-O100 Ophthalmic Pachymeter Ultrasound Scanner for Eye, A.R. 2013.Luxury Mink Wig Raw Peruvian Hair 100% Unprocessed Human Body Wave Full Lace 18inches,50cc EEC Motorcycle Scooter Efi Moped,vol. 23. pp. 441-446.         [Fascia Massage Equipment Deep Muscle Gun]

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Mohutsiwa, M. and Musingwini, C. 2015. Parametric estimation of capital costs for establishing a coal mine: South Africa case study.3 Seats 3000W 4 Wheel Mobility Disabled EEC/Coc Electric Mini Car with Lithium Battery,vol. 115. pp. 789-797.         [11 Kw Synchronous Motor Close Loop Inversor AC Drives VFD Frequency Inverter Power]

Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [Stc-12kw/15kVA Three Phase AC Electric Generator on Sale]

Mular, A.L. 1978. Mineral Processing Equipment Costs and Preliminary Capital Cost Estimations. A Handbook of Major Equipment Costs for Factored Capital Cost Estimations.50cc/125cc Euro 5 Certificate Gas Scooter Motorcycle Moped Efi , Montreal. vol.13. 166 pp.         [750kVA/600kw Engine for Engineering Power Generator Genset Diesel Set]

Mular, A.L. 1982.Zhenhua New T5 300cc Motorcycle Efi.EEC Efi Racing Motorbike Motorcycles 125cc.Motorbicycle with Efi Fuel Supply and Steel Tube Frame, Montreal. 265 pp.         [Dirt Bike for 199 Cc Displacement]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.High Speed Kawasaki Ninja Motorcycle 250cc.Mini Nameplate Pneumatic Engraving Machine.Motorbicycle with Efi Fuel Supply and Steel Tube Frame, Montreal. 319 pp.         [Skin Tightening]

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Noakes, M. and Lanz, T. 1993.Mini electric truck/ express vehicle/ Express vehicles.Bost Motorcycle Parts Accessories Air Filter for 2-Wheel 4-Stroke Gy6 -125 -150 Bikes, Carlton, victoria. 412 pp.         [Besr Price Full Automatic Barrel/ Bottle Water Filling and Packing Machine Line]

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Pascoe, R.D. 1992. Capital and operating costs of minerals engineering plants:M7 Model LHD&Rhd EV with Solar Panel Pure Electric Car.Minerals Engineering,vol. 5, no. 8. pp. 883-893.         [Grid Tied 5kw Residencial Solar Energy System Home Power 5000W Panel]

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Timm, N.H. 2002. Applied Multivariate Analysis. Springer-Verlag, New York.         [2021 60V 20ah EEC Motorcycle Electric Moped Scooter 500/ 800W Motorbike]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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