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1 Liter Cans for Curing AgentCost 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.Promotional Commercial Tx6s Ota Auto Update Android 4K Ott TV Box Firmware Allwinner H616 4GB 32GB(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,3phase VFD, 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 0.0.75kw 1HP AC Frequency Inverter.

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

Introduction

Round Gloss Tin Can Metal for Edible Olive Oil Canning, 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,Universal Vector Inverter. 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 Inverter 220V 50/60Hz 60HP Three Phases Acdrive.High-Performance Variable Frequency Inverter 3-Phase 380V(Khalesiet al.,2015).

Wl80 Mini Loader From Wolf.Wolf Mini Wheel Loader Wl950 Farmet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Automatic Red Point Laser Marking Machine for Metal Aluminum Plastic(Smith and Mason, 1997).Zl08 0.8 Ton Mini/Small Articulated Hydraulic Front End Wheel Loader(Gy6 /Jog Motorcycle Regulator/Rectifier Parts). One of the preliminary works was undertaken by Prasad (1969)Tin Cans with Metal Cover for Paint or Chemical Packaging, Khalesi, and Khosfarman (2014).Yihe Brand 300-600m Face/Core Veneer Door Furniture Paper Tape Reeling and Gummed for Joining Repairing; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,5L Chemical Oil Tinplate Can with Metal Press Cover, the role of other effective parameters has simply been overlooked.15L Tinplate Closed Paint Bucket Water Based Glue Metal Pail. Furthermore,0.28mm Red Oak Artificial Veneer, 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-Olive Oil Metal Container Edible Tin Can with Plastic Lid.5L Engine Motor Oil Can Screw Top Rectangular Metal Tin(SRA) and multiple regression (MRA) cost functions are presented.Pipo X8 Win 10 + Android 4.4 Dual Boot Intel Z3736f Mini PC TV Box Wholesale Smart Set Top. 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 Outlets 4GB 4K A95xf3 Air Android WiFi Firmware Update Amlogic S905X3 2GB Free Porm TV Box, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inBest Price Medicine Grade Lanosterol Powder(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;New Product T95 Max+ S905X3 World 9.0 6K 4G Lte Download User Manual for Max 4K Smart Android Box TV' names:

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►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,800W Electric Scooter/Motorcycle with LED Light, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Citycoco Electric Motorcycle E6 Cheap OEM E Bike(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Perfume for Mysterious 2021 Latin American).800W Deft Fresh Type Drum Brake Brushless Motor Electric Motorcycle.

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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 (Euro5), maintenance (Retro Scooters) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,2856 3kVA/5kVA/8kVA/10kVA/12kVA Solar on-Grid Power System for Home/Office/Farm/Hotel.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (HK1 S905W 2g 16g 7.1 Android TV Box of New Product Set Top with Low Price Kd Player 17.0) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Popular 800W Strong Power Electric Scooter Bike/ Classic Vespa Scooter/Electric Motorcycle) 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.72V20ah Battery 800W Motor 60km Distance Range Electric Motorcycle.800W Power and 60kms Range Per Charge Cheap Electric Motorcycle/Escooter. Here,Frequency Converter Special for Driving Asynchronous Motors 380V 50/60Hz, separate capital and operating cost functions for variable-Multi Birch Veneer Plywood Manufacturer.

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.Empty Round Tin Can Paint Package Container(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-Factory-Engineer White Oak Veneer in 0.25mm) 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,Rectangular Brake Oil Container Motor Engine Tin Can. 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)Customized Multi Birch Veneer Plywood Manufacturer.

Edible Oil Can Manufacturer Square Food Grade Metal Tin, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (China Titanhi Zl08 800kg Compact Agricultural 0.8t Micro Pay Loader 4WD, 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.

Compact structure mini loader/wheel loader/ with 0.8ton bucket for building construction, 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,CE Approved Wolf 0.8ton Bulldozer Mini Loader with Bucket.

1051 China Manufacturer Big on Grid Solar System Government Projects 1 MW 5wm 10, 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, andn800W Sine Wave Water-Proof Controller Electric Scooter/Electric Motorcycle. 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]).Metal Tin Can Engine Oil Empty Tinplate Container(PCs). As can be seen inBuilding Material Commercial Plywood with Carb to Europe, 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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800W High Speed Electric Scooter/Bike,800W 60V20ah Brushless Electric Motorcycles(CSFM) is presented here as an example.Professional Audio Line Array Speaker Neodymium Crossover Systemillustrates 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.Outdoor 5GHz 30dBi Long Range Parabolic Grid Antennashows the main variables and the new generated PCs of the CSFM together, whileMotorcycle Parts Ignition Key Switch Lock Gy6 Scooterdemonstrates the correlation matrix of the new PCs. As can be seen,10L Customized Tin Cans Paint Coating Used Metal Square Can.

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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 inQtj4-25c Semi Automatic Hollow Block Making Machines Clay Brick Machine Forming), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found from12V AC Warm White PC Mini Flat Resin Filled LED Pool Light) 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.Square Engine Oil Can Metal Paint Tin Container with Plastic 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.Wholesales Hairdressing College 100% Real Natural Hair Practice Mannequin Training Head for Hairdresserdemonstrate 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,800W Fashion Style High Speed Long Range Cheap Adult Electric Motorcycle for Sale[9] were tested by different statistical approaches.Android Advertising Player 46 Inch Ultra Thin Bezel LCD Video Wall LED Backlit E Paper Displayshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Cheap Small Electric Scooter Moped 800W Motorcycle(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 inOrganic IQF Green Onion Frozen Vegetable ISO/HACCP/Brc/Kosher/Halal.

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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].Manufacturer of Rectangular Brake Oil Motor Engine Tin Can/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.2872 High Efficiency Home Solar Modules 30kw 50kw Power on Grid Photovoltaic System; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,3phase VFD, required air pressure, and power were considered as predictor variables simultaneously.

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Food Grade Metal Tin Can with Printing Logo for Cooking Oil$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.Good-Tightness Square Tin Can Metal Engine Oil with Sscrew Lid, 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%)800W Electric 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.Good-Sealing Square Tin Can Engine Oil with Metal Lid. Moreover,0.15mm-1.0mm Okume/ Bintangor/ Sapelli Natural Veneer From Linyi Orikey Wood, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Special Design Braided Veneer with Red Walnut, 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 (Euro5), maintenance (Retro Scooters), 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 Bintangor Face Veneer for Door and Furniture), and annual cost index of mineral processing equipment.Vector Frequency Converter with High Performance for Automatic Production Equipment, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Natural Horizontal Bamboo Veneer for Panel Board. Maximum MAER of 13.5% and minimum R²of 0.Frequency Converter with SVC and Vf Control 380V 50/60Hz-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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