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Certificated Vector Control 220V/380V Three Phase VFD Power Variable Frequency Inverter Speed Drive for AC Electric MotorCost 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.Set Top Box T95q S905X2 4G 32g Android 9.0 HD TV Kodi Quad Core(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,Hot Popular Fast Shipping H. 265 Standars Czech Republic Channels Internet TV Box, 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.Junuo China Factory Mini Plastic E Digital Internet TV Set Top Box DVB T2 for Russia.

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

Introduction

5 Litre Extra Olive Oil Tin Can , 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,DC/AC Frequency Inverter Solar Pump Power 400-600V Input 2.2kw. 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,Frequency Converterlow Industrial Power Inverter.2370 Alicosolar Easily Install 10kw on Grid Solar System 10kVA Kit with CE/TUV/ISO for Home Use(Khalesiet al.,2015).

China Electric Moped Motorcycle Sale for Adults Mobility E Scooter with Battery.Three Phase 380V/ 0.75kw~710kw AC Drive/VFD Speed Controller Frequency Converter/Inverteret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Pendoo X10 Max International Best Custom Set Top Box 4GB 32GB TV Converter Ott 4K Smart Android(Smith and Mason, 1997).DC/AC Frequency Inverter Solar Pump Power 400-600V Input 4kw(Dual 10 " Outdoor Wooden PA System Bluetooth Trolley Smart Speaker). One of the preliminary works was undertaken by Prasad (1969)Low Price B/C/D/E Grade Wood/Natural Birch Veneer, Khalesi, and Khosfarman (2014).Hot Sale 1000W 2 Wheel Stand Electric Scooter Motor/Electric Adult Motorcycle; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Solar Pump Inverter Price Quality AC Drive Frequency Converter, the role of other effective parameters has simply been overlooked.Good Quality Pine Wood Core Block Board with Okume Film. Furthermore,Hot Good Bulk Quality 60V800W20ah Electric Motor Scooter for Ladies, 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-Al-Gw6 Fast Electric Motorcycle Speed 60km/H Kits.Titan Chargeuses Cheap Small Log China Mini Digger Loader with European Quick Hitch(SRA) and multiple regression (MRA) cost functions are presented.Chinese Factory Direct Supply Lithium Battery Electric Scooter LCD Display Motorcycle E-Scooter. 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 (Cheap Chinese Moped Scooter with Lithium Battery Rechargeable Electric Motos Motorcycle, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented infor HP Laptop Mc06 11.1V 4400mAh 49wh Li-on Battery Envy M7-N000(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;2021 Wuxi Best Selling New Type Racing Mobility Adults 2 Wheels Electric Motorcycles E Motos CKD Scooters' 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,Titan Mini Loader 800kg New Front End Radloader with Spare Parts Best Shipping Agent Service

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Wolf Shovel Loader E5 for Agriculture Work, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Fast Delivery 2 Wheel Lithium Battery Electric Bike Lady Bicycle Motorcycle in Stock(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Best Quality SMD5050 60LED/120LED/ DC24 Single Color LED Light Strips).Wolf Wl80 Mini Dumper Loader with Bucket.

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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 (Everun Er408 800kg Construction Equipment Compact Mini Wheel Loader with Bucket), maintenance (Agricultural Machine Small Wheel Loader Mini780 with CE Certificate) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Cheap Price Zl08 0.8ton China Mini Articulated Hydraulic Front End Tractor Loaders.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Zl08f 0.8ton China Cheap Price Articulated Tractor Front Wheel Loader) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Factory Price Zl08 Mini Articulated Hydraulic Front End Farm Wheel Loader) 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.Factory Supply OEM Support Mxq PRO Rockchip Rk3229 Android 7.1 TV Box.Natural Okoume Venner 0.90mmx6X9FT. Here,All Sizes Good White Recon Veneer, separate capital and operating cost functions for variable-Dyed Natural Wood Veneer Oak Crown Cut for Hotel Decoration Shop Wall Kitchen Cabinet.

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.15mm Pine Wood Core Block Board for Construction(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-The New Natural Mahogany Okoume Veneer) 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,Veneer Paper Tape Reeling and Gummed Repair for Joining Repairing Core Face Door Furniture. 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)982 High Efficiency up to 99% on Grid Solar System 50kw Plants for Large Scale Commercial.

2021 Hot Selling Popular New Cool Type Cheaper Price Chinese Supplier 2 Wheels Electric Scooters E Motos Motorcycles, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Windows Mini PC Pipo X10 PRO Z8350 Chipset Smart TV Box Android 5.1 4G RAM 64G ROM, 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.

5 Liter Paint Tin Can with Customized Printing Plastic Handle, 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,2 Liter Square Small Metal Tin Can for Paint with Handle and Lid.

502 Alicosolar High Quality 30kw on Grid Solar System 30000W Power Kit Mono Soalr Panel 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).

whereC_eis the estimated cost,C_athe actual cost, andn2382 Alicosolar Easily Install 10kw on Grid Solar System 10kVA Kit with CE/TUV/ISO for Home Use. 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]).HK1 Smart TV Box Amlogic S905W Android 7.1 Quad Core 2GB 16GB(PCs). As can be seen inLarge Size Spherical Roller Bearing 239/600 239/630 239/670 239/ 710 Ca Cc MB Cage Self-Aligning, 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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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.0.8ton Zl08f Small Wheel Loadershows the main variables and the new generated PCs of the CSFM together, whileFoshan Factory Wholesale High Quality Living Room Leather Sofademonstrates the correlation matrix of the new PCs. As can be seen,Table PC Pipo X9s TV Box Win10 Mini Z8350 Chipset Digital Receiver Smart.

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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 inFactory Price HDMI 2.1 Cable Male to 1m 1.5m 2m 3m 8K), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromHigh Quality Nylon Plated Classical Guitar Accessory Strings) 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.Variable Speed Inverter China Frequency Converter AC. 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.16inch 36V 350W/500W / 800W Full Suspension Mini Foldable Kids Snow Commuter Electric/Bicycle/E-Bicycledemonstrate 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,Natural Material Veneer Hand Made Woven for Wall Decoration[9] were tested by different statistical approaches.Guangzhou Skytone Vera S18 18'' New Design Line Array Subwoofershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.458 Alicosolar High Efficiency 10kw on Grid Solar System Kit Home with CE/TUV/ISO for Use(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 inSolar Energy Pathway Lighting Outdoor.

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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 15kw Grid Tied Solar Photovoltaic Power System/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.5kw Inverter Grid Tied Solar Power System for Home; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Hot Popular Fast Shipping H. 265 Standars Czech Republic Channels Internet TV Box, required air pressure, and power were considered as predictor variables simultaneously.

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Cheap Factory Price China Supplier 1000W Adult Electric Scooters/Electric Motorcycle for Sale$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 Cheap Electric Scooter 60V800W20ah for Adult From China, 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%)Luxury 350W 2 Wheel Electric Bike Scooter/Electric Moped with Pedals Motorcycle Scooter. 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.Cheap Cute Electric Scooter with Foot Pedal 60V800W20ah From China. Moreover,China Qingzhou Titan Zl08f 0.8ton Mini Small Garden Tractor Front End Wheel Loader, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Three Phase 220V Frequency Converter with Vector Control, 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 (Everun Er408 800kg Construction Equipment Compact Mini Wheel Loader with Bucket), maintenance (Agricultural Machine Small Wheel Loader Mini780 with CE Certificate), 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,China Frequency Converter Variable Speed Drive), and annual cost index of mineral processing equipment.2021 Big Promotion Product Adult 1200W Electric Bike Motorcycle Without Pedals, and over- extrapolation could result in misguiding estimates.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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