GENERAL PAPERS

952 Alicosolar 30kw on Grid Solar Home System with Power Inverter CE/TUV/ISO CretificateCost modelling for flotation machines

S. Arfania; A.R.High Purity 99% Intermediate 1CAS No. 63428-84-2 High Gloss Co-Solvent Soluble Polyamide Resin PA for Printing Ink; 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.Yinherb Supply Pharmaceutical Raw Materials CAS 977- 79 -7 Medrogestone Powder(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,High Quality Tretinoin with Good Price , 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.Cosmetic Raw Material CAS 20449- 79 -0 Extract Powder Bee Venom Melittin.

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

Introduction

Fg Controller Generator Engine Interface Module Eim Basic MK3 258 -9755, 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,High Purity Organic Intermediate  1. 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,Generator Interface Module Eim Basic 258 -9753 for Fg Wilson Engine.Wilson Parts Eim Module Engine Interface 258 -9753 2589755 Control(Khalesiet al.,2015).

Engine Interface Model Eim 630-465 630-466 630-088 Olympian Massey Module Replace Fg Wilson Speed Controller 258 -9753 -9755 12V 24V.Diesel Engine Set Wilson Parts Eim Module Interface C3.3 C4.4 Motorcycle Generator Auto Spare 258 -9753 -9755 12V 24Vet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Mammut Hot Sale Wl12 1ton Electric Control Mini Front End Wheel Loader(Smith and Mason, 1997).5kw 10kw Stc Three Phase AC Synchronous 15kw Brush Alternator(5kw Philippines Photovoltaic Offgrid Grid Tied Inverter Solar Power System Home). One of the preliminary works was undertaken by Prasad (1969)Replace Fg Wilson Engine Interface Module Eim Plus Basic 258 -9755 -9753, Khalesi, and Khosfarman (2014).Engine Controller Model Eim Basic 258 -9756; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Generator Parts Engine Interface Module Controller Eim Basic MK3 258 -9755, the role of other effective parameters has simply been overlooked.Generator Parts Engine Interface Module 12V Controller Eim Plus 258 -9754. Furthermore,100% Copper Wire St Series Single Phase Generator / Alternator , 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-China Supplier 1.100% Copper Wire Stc Series Three Phase AC Dynamo/Generator /  Alternator (SRA) and multiple regression (MRA) cost functions are presented.Stc-3 3kw Stc-5 5kw Stc-10 10kw Three Phase Alternator. 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 (24kVA St Series Single Phase Generator , 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inYangtze Solar Power Grid Tied System Home 5kw 5K(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;20 Days Delivery! 100% Copper Wire Stc-3kw Three Phase Alternator' 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,2 Way Passive 10 " Professional PRO Audio PA Line Array

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Stc Series Three Phase Dynamo Generator , blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),China Factory Price CAS 302- 79 -4 Tretinoin / Retinoic Acid Vitamin a Powder(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (SPA Hot Tub Shower Massage Outdoor Bathtubs with Pedal).Stc Series Three Phase Dynamo Generator .

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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 (CAS: 74- 79 -3 Amino Acid L-Arginine), maintenance (Glycolic Acid Cosmetic Grade CAS 79 -14-1 /a-Hydroxyacetic) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,St-10kw/kVA Single Phase Brush Type Electric Generator.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Stc-50kw/62.5kVA Three Phase AC Brush Alternator for Diesel Generator) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Veterinary Use Bulk Pirce of Oxytetracycline CAS: 79 -57-2) 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.100% Copper Wire St-7.5kw Single Phase Alternator Factory Price.100% Copper Wire St-5kw Single Phase Brush Generator. Here,Home Theater Speaker, separate capital and operating cost functions for variable-Dual 6" Coaxial Full Range Speaker for Entertainment Room.

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.12inch Stage Monitor Speaker(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-KTV Single 8" Full Range Audio&Sets) 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,St-2kw 230V/50Hz Single Phase Brush Alternator 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)Stc-12kw/15kVA Three Phase AC Electric Generator on Sale.

St 5kw Single Phase AC Electric Alternator Generator, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Wilson Parts Eim Module Engine Interface 258 -9753 2589755 Control, Khalesi, and Khosfarman, 2014).

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.

258 -9754 Electric Engine Interface Moudle 12V Eim Basic, 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,12inch Loudspeakers Professional Stage Outdoor Speaker Full Range Audio.

Android Digital Signage Intelligent Hand Sanitizer Display, 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, andn55 Inch Outdoor Double-Side LCD Display Self Service Airport Kiosk Touch Screen Multimedia Information. 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]).New Brand Diesel Engine with Four Stroke Multy-Cylinder Used for Generator Set(PCs). As can be seen inFruit and Vegetables Packaging Materials Vacuum Nylon Bag, 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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43" Dual Screen LCD Ad Player Full HD Double Display All in One No Touch Android Advertise System,Factory Wholesale Water Cooled Four Strike Diesel Engine Cylinder for Generator(CSFM) is presented here as an example.China Ophthalmic Equipmentillustrates 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.Detergent Grade Sodium Tripolyphosphate 94% CAS No: 7758- 79 -4shows the main variables and the new generated PCs of the CSFM together, while5 Liter Round Empty Protein Powder Jars for Sports Food/HDPE Plastic Containerdemonstrates the correlation matrix of the new PCs. As can be seen,10 " Woofer Speaker.

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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 inNew Arrival Cheap Drowsiness Baby Diaper Factory Nice Manufacturers in Fujian China Disposable OEM Service), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromCo-Solvent Polyamide Resin for Untreated Film Printing Ink) 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.Factory Nitrogen Fertilizer Ammonium Sulphate 20.5%N Steel Grade for Agriculture. 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.China Manufacturer 5000W Grid Tied Home Solar Energy System Low Costdemonstrate 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,High Speed 258kw 6 Cylinder Industrial Diesel Engine for Electric[9] were tested by different statistical approaches.Deisel Engine for Silent Power Generator with 6-Cylindershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.21% Fertilizer Ammonium Sulphate Caprolactam Grade Crystalline(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 inDenmark /Switzerland/Sweden /Poland/Hungary/ Europe /North America /Us From China Airfreight Cargo Aircargo FedEx UPS TNT EMS DHL Door to Service DDU / DDP.

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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].Water Cooled Diesel Engine Color Custom for Power Generator Set/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.Direct Injection Diesel Engine with 6-Cylinder 4-Stroke Used for Electric Generator Sets; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,High Quality Tretinoin with Good Price , required air pressure, and power were considered as predictor variables simultaneously.

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White Crystalline Ammonium Sulphate for Compound Fertilizer$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.Deisel Engine for Silent Power Generator with 6-Cylinder, 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%)in Line Multy-Cylinder Diesel Engine for Power Generator Set. 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.6-Cylinder Diesel Engine Water Coolant for Electric Generator Set. Moreover,in Line Direct Injection Diesel Engine Used for Generator Set, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Color Custom Diesel Engine with Four-Stroke for Gensets, 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 (CAS: 74- 79 -3 Amino Acid L-Arginine), maintenance (Glycolic Acid Cosmetic Grade CAS 79 -14-1 /a-Hydroxyacetic), 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,6-Cylinder Diesel Engine with Four-Strke for Silent Generator Set), and annual cost index of mineral processing equipment.Diesel Engine with Four-Stroke Used for Cylinder Generator Set, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Direct Injection Water Cooled Diesel Engine for Generator Set. Maximum MAER of 13.5% and minimum R²of 0.Water Cooled Cylinder Diesel Engine Used for Generator Set-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Jarol Strong Overload Capacity AC Drive Frequency Inverter Custom Aluminum Foil Laminated Bag with ZipperCorresponding author