GENERAL PAPERS

Rosen 55kw Grid Tied on Solar System to Global MarketCost modelling for flotation machines

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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.Factory Produce Natural Face Veneer Size 1220X1830X0.25mm(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,Electric Motorcycle/Scooter/Bike , 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 0.800W EEC Electric Motorcycle.

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

Introduction

No Foldable 40-60km Range Per Charge EEC Electric Scooter, 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,1 Wheel Electric Motorcycle/One Scooter. 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,High-Performance Frequency Converter/AC Drive 380V 50/60Hz.Three Phase 380V Small Frequency Converter(Khalesiet al.,2015).

Hot Sale High Performance Vector Frequency Converter 380V 45/55kw.Single/Three Phase 220V 380V Vector Control Frequency Converteret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Good-Tightness Square Tin Can Metal Engine Oil with Sscrew Lid(Smith and Mason, 1997).Factory-Enginneered Veneer Ash in 0.30mm(Diesel Engine Parts Fuel Injection Nozzle 132s1320). One of the preliminary works was undertaken by Prasad (1969)Small Frequency Inverter 380V 50/60Hz, Khalesi, and Khosfarman (2014).China Single Phase Variable Frequency Inverter 1.5kw; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,1.2mm White Poplar Veneer From Factory for Exporting, the role of other effective parameters has simply been overlooked.Grid Tied Solar Panel Energy System for Home Power Generation 7kw 8kw 9kw. Furthermore,Eucalyptus Core or Birch for Veneer with Grade AA, 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-Wholesale 1.5 mm Natural Bamboo Skateboard Veneer with Best Price.Popular 800W Power Electric Scooter(SRA) and multiple regression (MRA) cost functions are presented.1250X2500mm Rotary Cut Okoume Veneer Cheap Prices. 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 (Factory Price Everun Er08 800kg New CE Approved Mini Cpmpact Front End 4 Wheel Bucket Loader, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inCyclopropyl Acetylene/ Lide Pharma- Factory Supply / Best Price CAS 6746-94-7(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;2862 Easy Installation 5kw 6kw 8kw 10kw 12kw on Grid Solar System' 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 Type Fashionable Chinese Supplier Brushless Max Speed 35km/H 2 Wheel Electric Motorcycle

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Best Chinese Big Wheel Electric Motorcycle Racing Bike Adult Bicycle, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Bd600 AC Frequency Inverter/Converter/220 V to 380 Inverter(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Car Hood Bonnet Logo Metal Badge Emblem for Jaguar).1L Beer Can.

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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 (High Quality Electric Scooter Factory), maintenance (Cute Electric Scooter Motorcycle with Pedals 60V800W14ah Lithium Battery for Adults) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,1L Panit Can.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (1L and 5L Can for Antifreezing Liquid) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (2021 Fashionable High Quality with Lithium Battery Electric Scooters EEC Vespa Citycoco Newest Model Motorcycle) 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.Pump Inverter Variable Frequency Drive Manufacturers AC Supplier.Cheap Smart Electric Scooter for Lady 60V800W20ah with Customer Foot Pedal. Here,Wenge Veneer Catedral Chapa De Madera Reconstituted Engineered PARA MDF Enchapados, separate capital and operating cost functions for variable-China Ebike Velo Electr 500 Watt Electric Motorbikes for Adults in Stock.

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.Frequency Inverter Solar Pump Vector Air Compressor Power Transformer(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-Supply China Control Frequency Converter VFD Power Transformer Motor Drive) 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,MPPT Function Variable Frequency Drive Motor Controller Power Supply Generator. 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)0.75kw-11kw Three Phase 380V Frequency Inverter VFD.

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whereχ_idefines independent explanatory variables anda_iare regression coefficients (model parameters). As was mentioned, independency ofx_ivariables 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.

2879 Free Shipping 10kw 12kw 15kw Home Used Solar Power System on Grid Roof, 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]:

whereX_obsis the observed value,x_ethe estimated value at time/placeI,and n,AAA Grade 0.9mm Poplar Core/Veneer for Plywood/Furniture.

Radiate Pine Face Veneer, 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).

whereC_eis the estimated cost,C_athe actual cost, andnGrade AA Veneer Furniture Building Material Plywood to Dubai. 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]).1L Wholesale Round Tin Can for Paint/Engine Oil with Tight Lid(PCs). As can be seen inBintangor Okoume Pencil Ceder Commercial Plywood for Furniture and Decoration, 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 andX_ias Equations [5] and [6]:

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In this research, main variables ofX₁, X₂... X_nwere 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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Small Wheel Loader Wl80 800kg Loaders for Farm Work,1L Tin Can for Camellia Oil (CSFM) is presented here as an example.Vitamin a Palmitate CAS 79 -81-2illustrates 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 Quality Hot Sale PC Epoxy Resin Filled 12V AC 18W RGB Wall Mounted LED Swimming Pool Light with Edison Chipsshows the main variables and the new generated PCs of the CSFM together, whileHair and Eyelash Growth Acetyl Tetrapeptide-3/Capixyl CAS 155149- 79 -4demonstrates the correlation matrix of the new PCs. As can be seen,CE Best Pedal Assist Scooters Motor Powerful Electric Motorcycle for Adults CKD Fashionable Mobility.

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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)

whereX_iare main technical variables (like power or required air),a_iare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inCustomized OEM 100L/120L/240L public trash can), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromPE Geomembrane/Waterproof Sheet Extrusion Line) 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 0.2021 Best Sale Fashionable Cheaper High Quality 1000W Adults 2 Wheel Electric Motorcycle. 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.Good Quality Powder CAS 56377- 79 -8 Nosiheptide with Best Pricedemonstrate 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,Set Top Box T95q S905X2 4G 32g Android 9.0 HD TV Kodi Quad Core[9] were tested by different statistical approaches.Yn725g Yineng Mini Wheel Loadershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Hot Popular Fast Shipping H. 265 Standars Czech Republic Channels Internet 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 inNew Design 14 K Gold Plated Fashion Jewelry 925 Sterling Silver or Brass CZ Ring for Sale.

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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].5 Litre Extra Olive Oil Tin Can /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.DC/AC Frequency Inverter Solar Pump Power 400-600V Input 2.2kw; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Electric Motorcycle/Scooter/Bike , required air pressure, and power were considered as predictor variables simultaneously.

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China Electric Moped Motorcycle Sale for Adults Mobility E Scooter with Battery$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.Three Phase 380V/ 0.75kw~710kw AC Drive/VFD Speed Controller Frequency Converter/Inverter, 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%)DC/AC Frequency Inverter Solar Pump Power 400-600V Input 4kw. 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.Low Price B/C/D/E Grade Wood/Natural Birch Veneer. Moreover,Hot Sale 1000W 2 Wheel Stand Electric Scooter Motor/Electric Adult Motorcycle, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Solar Pump Inverter Price Quality AC Drive Frequency Converter, 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 (High Quality Electric Scooter Factory), maintenance (Cute Electric Scooter Motorcycle with Pedals 60V800W14ah Lithium Battery for Adults), 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,Good Quality Pine Wood Core Block Board with Okume Film), and annual cost index of mineral processing equipment.Hot Good Bulk Quality 60V800W20ah Electric Motor Scooter for Ladies, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Al-Gw6 Fast Electric Motorcycle Speed 60km/H Kits. Maximum MAER of 13.5% and minimum R²of 0.Titan Chargeuses Cheap Small Log China Mini Digger Loader with European Quick Hitch-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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