GENERAL PAPERS

1HP Frequency Converter Vector Three PhaseCost modelling for flotation machines

S. Arfania; A.R.Everun Er408 800kg Construction Equipment Compact Mini Wheel Loader with BucketZl08f Mini Tractor Articulated Hydraulic Front End Wheel Loader; 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.Agricultural Machine Small Wheel Loader Mini780 with CE Certificate(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 Price Zl08 0.8ton China Mini Articulated Hydraulic Front End Tractor Loaders, 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.Zl08f 0.8ton China Cheap Price Articulated Tractor Front Wheel Loader.

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

Introduction

Factory Price Zl08 Mini Articulated Hydraulic Front End Farm Wheel Loader, 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,Factory Supply OEM Support Mxq PRO Rockchip Rk3229 Android 7.1 TV Box. 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,Natural Okoume Venner 0.90mmx6X9FT.All Sizes Good White Recon Veneer(Khalesiet al.,2015).

Dyed Natural Wood Veneer Oak Crown Cut for Hotel Decoration Shop Wall Kitchen Cabinet.15mm Pine Wood Core Block Board for Constructionet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Top Local Anesthetic Supplier Marcaine Injection 14252-80-3 Bupivacaine Powder(Smith and Mason, 1997).The New Natural Mahogany Okoume Veneer(Master Batch Organic Colors). One of the preliminary works was undertaken by Prasad (1969)Veneer Paper Tape Reeling and Gummed Repair for Joining Repairing Core Face Door Furniture, Khalesi, and Khosfarman (2014).982 High Efficiency up to 99% on Grid Solar System 50kw Plants for Large Scale Commercial; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,2021 Hot Selling Popular New Cool Type Cheaper Price Chinese Supplier 2 Wheels Electric Scooters E Motos Motorcycles, the role of other effective parameters has simply been overlooked.Windows Mini PC Pipo X10 PRO Z8350 Chipset Smart TV Box Android 5.1 4G RAM 64G ROM. Furthermore,5 Liter Paint Tin Can with Customized Printing Plastic Handle, 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-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(SRA) and multiple regression (MRA) cost functions are presented.2382 Alicosolar Easily Install 10kw on Grid Solar System 10kVA Kit with CE/TUV/ISO for Home Use. 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 (HK1 Smart TV Box Amlogic S905W Android 7.1 Quad Core 2GB 16GB, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inFangpower 400cc 4seat Side by Dune Buggy UTV(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Innopack 5L Paint Engine Oil Tin Can with Plastic Handle' 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,Variable Speed Inverter China Frequency Converter AC

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Natural Material Veneer Hand Made Woven for Wall Decoration, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),458 Alicosolar High Efficiency 10kw on Grid Solar System Kit Home with CE/TUV/ISO for Use(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Good Quality Fungicide Tebuconazole).5kw Single Phase Home Grid Tied Solar Power System.

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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 (Hot Sale 15kw Grid Tied Solar Photovoltaic Power System), maintenance (5kw Inverter Grid Tied Solar Power System for Home) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,975 Solar 30kw 40kw on Grid Tie Power System for Factory/House Roof.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Rosen 55kw Grid Tied on Solar System to Global Market) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Cheap Factory Price China Supplier 1000W Adult Electric Scooters/Electric Motorcycle for Sale) 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.Hot Cheap Electric Scooter 60V800W20ah for Adult From China.Luxury 350W 2 Wheel Electric Bike Scooter/Electric Moped with Pedals Motorcycle Scooter. Here,Cheap Cute Electric Scooter with Foot Pedal 60V800W20ah From China, separate capital and operating cost functions for variable-China Qingzhou Titan Zl08f 0.8ton Mini Small Garden Tractor Front End Wheel Loader.

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

Factory Price Wholesale 4oz-32oz Empty PVC Glue Tin Can with Brush, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Okoume Veneer, 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.

Luneng Yn725 Yineng Mini Wheel Loader 18.5kw Cabin, 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,Chinese Factory Tin Can with Brush for Glue and Sealants Adgesives.

Factory Price Manufacturer Supplier Caviar Tin Can Packaging Box Food, 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, andnCustomized Metal Tea Canister Food Packaging Box Round Can Tin. 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]).Square Tin with Airtight Lever Lid for Tea(PCs). As can be seen inSingle/Three Phase 220V 380V Vector Control Frequency Converter, 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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968 Solar 30kw 40kw on Grid Tie Power System for Factory Roof,0.15mm Rosewood Veneer(CSFM) is presented here as an example.Super Operation System Cavitation + RF Vacuum Roller Bio Laser Slimming Machineillustrates 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.Frequency Converter 60Hz 50Hz 125HPshows the main variables and the new generated PCs of the CSFM together, whileUnderwater Swimming Pool Light Decoration LED Lamp with Edison Chipdemonstrates the correlation matrix of the new PCs. As can be seen,Interior Decorative Woven Veneer Customized Style.

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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 inGood Quality 10 Ton Big Duty Crane Lifting Electric Chain Hoist), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found from30Hz J45 Worldwide Download User Manual for Android Case DDR4 4GB/128GB Octa-Core 2021 Control 4G Internet Set Top TV Box) 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.Farm Machinery Zl08f Mini Wheel Loader with 4 in 1 Bucket. 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.1L /1000ml Extra Virgin Olive Oil Metal Candemonstrate 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,Yn725 Yineng Mini Wheel Loader 18.5kw Cabin[9] were tested by different statistical approaches.Stainless Steel Metal Rotray Fiber Laser Marking Machine for Aluminumshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Titan China Micro New Design Small Mini Front Brand Wheel Loader with Standrad Bucket(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 in500 Kg/Hr Powder Coating Production Line Machine.

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Cost model for variable-Yn725 Yineng Mini Wheel Loader 18.5kw Cabin

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].Yn725 Yineng Mini Wheel Loader 18.5kw Cabin/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.0.6mm----2mm AAA Grade White Poplar Wood Veneer for Plywood Usage; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Cheap Price Zl08 0.8ton China Mini Articulated Hydraulic Front End Tractor Loaders, required air pressure, and power were considered as predictor variables simultaneously.

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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.Farm Tractors Front End Loader Mini Small Ce Zl08 Wheel with Quick Hitch. Moreover,Cute City Electric Scooter 600V800W14ah Lithium Battery for Adults, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Yn725 Yineng Mini Wheel Loader 18.5kw Cabin, 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 (Hot Sale 15kw Grid Tied Solar Photovoltaic Power System), maintenance (5kw Inverter Grid Tied Solar Power System for Home), 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,Natural Wood Veneer Oak /Cherry/Walnut MDF Board), and annual cost index of mineral processing equipment.Zl08 0.8ton Mini Tractor Backhoe Front End Farm Wheel Loader Price List, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Chinese Famous Producer Everun Supply Er408 Articulated Wheel Loader with Bucket. Maximum MAER of 13.5% and minimum R²of 0.0.3mm Rotary Cut Red Wood Veneer-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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