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Universal LPG Gas Completed ECU Conversion KitCost modelling for flotation machines

S. Arfania; A.R.Tin Cans with Metal Cover for Paint or Chemical PackagingEuro5; 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.Yihe Brand 300-600m Face/Core Veneer Door Furniture Paper Tape Reeling and Gummed for Joining Repairing(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,5L Chemical Oil Tinplate Can with Metal Press Cover, 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 0.15L Tinplate Closed Paint Bucket Water Based Glue Metal Pail.

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

Introduction

0.28mm Red Oak Artificial Veneer, 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,Olive Oil Metal Container Edible Tin Can with Plastic Lid. 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,5L Engine Motor Oil Can Screw Top Rectangular Metal Tin.Pipo X8 Win 10 + Android 4.4 Dual Boot Intel Z3736f Mini PC TV Box Wholesale Smart Set Top(Khalesiet al.,2015).

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Methodology

Data

Thirty-seven major flotation machines (Retro Scooters, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inPolyethylene Green Color Masterbatch(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;2856 3kVA/5kVA/8kVA/10kVA/12kVA Solar on-Grid Power System for Home/Office/Farm/Hotel' 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,Frequency Converter Special for Driving Asynchronous Motors 380V 50/60Hz

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Multi Birch Veneer Plywood Manufacturer, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Empty Round Tin Can Paint Package Container(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Custom Brand 60ml Cute Mini Antibacterial Waterless Kids Hand Sanitiser).Factory-Engineer White Oak Veneer in 0.25mm.

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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 (Rectangular Brake Oil Container Motor Engine Tin Can), maintenance (Customized Multi Birch Veneer Plywood Manufacturer) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Edible Oil Can Manufacturer Square Food Grade Metal Tin.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (China Titanhi Zl08 800kg Compact Agricultural 0.8t Micro Pay Loader 4WD) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Compact structure mini loader/wheel loader/ with 0.8ton bucket for building construction) 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.CE Approved Wolf 0.8ton Bulldozer Mini Loader with Bucket.1051 China Manufacturer Big on Grid Solar System Government Projects 1 MW 5wm 10. Here,800W Sine Wave Water-Proof Controller Electric Scooter/Electric Motorcycle, separate capital and operating cost functions for variable-Metal Tin Can Engine Oil Empty Tinplate Container.

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.Rosen 35kw Grid Tied on Solar System to Global Market(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-800W High Speed Electric Scooter/Bike) 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,800W 60V20ah Brushless Electric Motorcycles. 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)10L Customized Tin Cans Paint Coating Used Metal Square Can.

500W/ 800W / 1000W E Scooter/Electric Moped/Electric Bike, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Square Engine Oil Can Metal Paint Tin Container with Plastic Lid, 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.

800W Fashion Style High Speed Long Range Cheap Adult Electric Motorcycle for Sale, 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,Cheap Small Electric Scooter Moped 800W Motorcycle.

Frequency Converter for Small Power Motors 3pH 380V 50/60Hz, 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, andnManufacturer of Rectangular Brake Oil Motor Engine Tin Can. 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]).2872 High Efficiency Home Solar Modules 30kw 50kw Power on Grid Photovoltaic System(PCs). As can be seen inChinese Factory Tin Can with Brush for Glue and Sealants Adgesives, 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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866 5kw on Grid Solar System with Power Inverter for Home,Food Grade Metal Tin Can with Printing Logo for Cooking Oil(CSFM) is presented here as an example.2L Galvanized Tin Cans for Cooking Oil with Plastic Lidsillustrates 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.Industrial Dust Collector Ash Separator Precipitators Dirt Catcher Electrostatic Precipitatorshows the main variables and the new generated PCs of the CSFM together, whileHot Sale 0.6m 5GHz Parabolic Antenna with Gian 28dBidemonstrates the correlation matrix of the new PCs. As can be seen,Good-Tightness Square Tin Can Metal Engine Oil with Sscrew Lid.

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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 inExpress Courier Mailer Biodegradable Compostable Customer Printed Logo Bag with 7p0810 Certified), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromL18 /86130 100%Good Feedback! Professional 18 Inch PA Speaker 1000W RMS Subwoofer) 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.Good-Sealing Square Tin Can Engine Oil with Metal Lid. 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.Safety Shape Bag /Food Packaging Contact Plastic Container for Resealabledemonstrate 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,0.15mm-1.0mm Okume/ Bintangor/ Sapelli Natural Veneer From Linyi Orikey Wood[9] were tested by different statistical approaches.Customized Label Plastic White Black Kraft Paper Pouch One Way Valve Roasted Bean Flat Bottom Coffee Bag Food Packaging Rice Pet Containershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Special Design Braided Veneer with Red Walnut(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 inUpgrades Outdoor IP65 98 LED Solar Motion Sensor Wall Light for Garden.

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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].Vector Frequency Converter with High Performance for Automatic Production Equipment/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.Natural Horizontal Bamboo Veneer for Panel Board; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,5L Chemical Oil Tinplate Can with Metal Press Cover, required air pressure, and power were considered as predictor variables simultaneously.

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High-Performance Frequency Converter Three Phase 380V 50/60Hz$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.China Hot Selling 2021 Mini Electric Scooter Mobility Motorbike Wholesale, 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%)Electric Motorcycle . 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.Electric Motorcycle . Moreover,Electric Motorcycle, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Electric Motorcycle , 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 (Rectangular Brake Oil Container Motor Engine Tin Can), maintenance (Customized Multi Birch Veneer Plywood Manufacturer), 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,750ml Metal Tin Can Container for Chili Oil Canning), and annual cost index of mineral processing equipment.Hot Sale Food Packaging Tin Can for Cooking Oil with Plastic Lids, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Metal Engine Oil Can Recycling Lubricant Tin Packaging Container. Maximum MAER of 13.5% and minimum R²of 0.2L Galvanized Tin Cans for Cooking Oil with Plastic Lids-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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