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Metal Tin with Steel Handle for PaintCost 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.5kw Single Phase Home Grid Tied Solar Power System(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 Sale 15kw Grid Tied Solar Photovoltaic Power System, 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 0.5kw Inverter Grid Tied Solar Power System for Home.

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

Introduction

975 Solar 30kw 40kw on Grid Tie Power System for Factory/House Roof, 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,Rosen 55kw Grid Tied on Solar System to Global Market. 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,Cheap Factory Price China Supplier 1000W Adult Electric Scooters/Electric Motorcycle for Sale.Hot Cheap Electric Scooter 60V800W20ah for Adult From China(Khalesiet al.,2015).

Luxury 350W 2 Wheel Electric Bike Scooter/Electric Moped with Pedals Motorcycle Scooter.Cheap Cute Electric Scooter with Foot Pedal 60V800W20ah From Chinaet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Purity 75% Colorless Transparent Liquid Isopropyl Alcohol Disinfectant(Smith and Mason, 1997).China Qingzhou Titan Zl08f 0.8ton Mini Small Garden Tractor Front End Wheel Loader(Best Selling 4X4 Farm ATV). One of the preliminary works was undertaken by Prasad (1969)Three Phase 220V Frequency Converter with Vector Control, Khalesi, and Khosfarman (2014).China Frequency Converter Variable Speed Drive; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,2021 Big Promotion Product Adult 1200W Electric Bike Motorcycle Without Pedals, the role of other effective parameters has simply been overlooked.Frequency Converter 60Hz 50Hz 200HP. Furthermore,Factory Price Wholesale 4oz-32oz Empty PVC Glue Tin Can with Brush, 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-Okoume Veneer.Luneng Yn725 Yineng Mini Wheel Loader 18.5kw Cabin(SRA) and multiple regression (MRA) cost functions are presented.Chinese Factory Tin Can with Brush for Glue and Sealants Adgesives. 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 Manufacturer Supplier Caviar Tin Can Packaging Box Food, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inPortable On-Site Pipe Tube Chamfering Chamfer Machine(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Customized Metal Tea Canister Food Packaging Box Round Can Tin' 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,Interior Decorative Woven Veneer Customized Style

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,4WD Wheel Loader Manufacture Small Radlader 1.0 Ton Mini780, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Farm Machinery Zl08f Mini Wheel Loader with 4 in 1 Bucket(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (High Grade-Iron Pyirtes).Yn725 Yineng Mini Wheel Loader 18.5kw Cabin.

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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 (Titan China Micro New Design Small Mini Front Brand Wheel Loader with Standrad Bucket), maintenance (Yn725 Yineng Mini Wheel Loader 18.5kw Cabin) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Yn725 Yineng Mini Wheel Loader 18.5kw Cabin.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (0.6mm----2mm AAA Grade White Poplar Wood Veneer for Plywood Usage) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Chinese Suppliers B/C/D/E Grade Wood/Natural Birch Veneer) 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.Wolf Baumaschinen Zl08 Radlader with Canopy.Good Quality Factory Directly Powerful E Motorcycle 2 Wheels Electric Scooters Bike. Here,Quarter Cut Ebano Makassar Chapa De Madera PARA Cocina Puerta, separate capital and operating cost functions for variable-0.25-1.0mm Hot Sale Natural Red Beech Veneer for Furniture.

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.Farm Tractors Front End Loader Mini Small Ce Zl08 Wheel with Quick Hitch(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-Cute City Electric Scooter 600V800W14ah Lithium Battery for Adults) 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,Yn725 Yineng Mini Wheel Loader 18.5kw Cabin. 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)Natural Wood Veneer Oak /Cherry/Walnut MDF Board.

Zl08 0.8ton Mini Tractor Backhoe Front End Farm Wheel Loader Price List, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Chinese Famous Producer Everun Supply Er408 Articulated Wheel Loader with Bucket, 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.

0.3mm Rotary Cut Red Wood Veneer, 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,Factory-Quater Cut Okoume Veneer /Mahogany in 0.50mm.

Yn725 Yineng Mini Wheel Loader 18.5kw Cabin, 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, andnGurjan Veneer Keruing. 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]).Everun CE Approved 0.8 Ton Front End Loader(PCs). As can be seen inVdf AC DC Drive Solar Power Inverter Converter Using for Tower Lift 250kw, 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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974 Solar 30kw 40kw 50kw on Grid Tie Power System for House/Factory Roof,2-30mm Hot Sale Double Sided E0/E1 Glue Melamine/Fancy Plywood for Furniture(CSFM) is presented here as an example.6speed 20inch Wheel Aluminum Alloy Folding Mountain Bikeillustrates 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.15HP Three Phase Frequency Convertershows the main variables and the new generated PCs of the CSFM together, whileHigh Purity Amino Acid L-Arginine Powderdemonstrates the correlation matrix of the new PCs. As can be seen,New Products Customized Support 1080P Decoder Box H. 265 TV with Internet Port.

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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 inElectric Display Showcase/Food Warmer Dh-580), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromGood Quality Factory Directly Powerful E Motorcycle 2 Wheels Electric Scooters Bike) 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 Product 4K Android TV Box Mxq PRO Rk3229 7.1 1GB 8GB. 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.Modern Simple Living Room L Shape Corner Recliner Sectional Sofademonstrate 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,970 Solar 30kw 40kw on Grid Tie Power System for Factory Roof[9] were tested by different statistical approaches.Buy Sugammadex Sodium CAS 343306- 79 -6 From Manufacturershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Best Price Food Tin Metal Box Clip Lid Candy Can(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 inInterior Tile Ceramic Sri Lanka Tiles Traders Marble for Project.

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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].High Quality Mxq PRO 4K Rk3229 1GB 8GB Android7.1 Quad Core Android TV Box/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.High Efficicency Roof Mounting Grid Tied Home Solar Energy System; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Hot Sale 15kw Grid Tied Solar Photovoltaic Power System, 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.Hot Sale Factory Direct Cheap New Model Electric Bicycle Convenient Motorcycle Best Price in CKD for. Moreover,OEM 6kw Home Grid Tied Solar Power System Without Battery, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Al-Gw6 China Best Adult Electric Motorcycle Scooter for Sale, 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 (Titan China Micro New Design Small Mini Front Brand Wheel Loader with Standrad Bucket), maintenance (Yn725 Yineng Mini Wheel Loader 18.5kw Cabin), 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,2 Wheel High Speed Lithium Battery E Motorcycle 500W Electric Scooter for Adults), and annual cost index of mineral processing equipment.800kg Wolf Zl08 Wheel Hoflader Loader Mini Bagger with Attachments, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,High Quality Cheap Custom Logo Printing Round Metal Cans with Lids. Maximum MAER of 13.5% and minimum R²of 0.Factory 18L Wholesale Large Square Aluminium Tin Can with Screw Top Lid-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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