GENERAL PAPERS

Sofa PVC Leather 2021Cost 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.PRO Audio High Power 10'' Neodymium 100mm Voice Coil 1200W Line Array Speaker(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,Heat Seal Candy Snack Food Packaging Ny PE Pet Custom Plastic Stand up Pouch Doypack Free Design Rice Bottle Smell Proof Soft Touch Aluminum Vitamin Cookie Bag, 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.High Quality Chemical Product Antioxidant Irganox 1076 CAS 2082- 79 -3.

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

Introduction

Manufacturer Supply 1, 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,Single 10 Inch Top Line Array Passive Audio Speaker PA System Suited to 500-1500 People. 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,99% Glycolic Acid Powder CAS 79 -14-1.5f-Pcn CAS No. 1445579- 79 -2 in Stock(Khalesiet al.,2015).

Ortho Phthalaldehyde CAS 643- 79 -8 O-Phthalaldehyde.Supply 99% Purity 3-Amino-4-Pyrazolecarboxamide Hemisulfate et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Free Sample Bulk Stock Procaine South America Warehouse CAS: 51-05-8(Smith and Mason, 1997).Sugar Fruit Salt Food Packaging Aluminum Foil Mylar Spice Bags Transparent Clear Stand up Zip Lock Resealable Beef Nuts Rice Coffee Cereal Tea Plastic Pouch(15inch Professional Stereo Sound PA PRO Audio DJ Loud Speaker). One of the preliminary works was undertaken by Prasad (1969)Line Array 10'' Neodymiun PRO Audio Woofer, Khalesi, and Khosfarman (2014).Diesel Engine Parts Fuel Injection Nozzle 160sn529; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,CAS: 702- 79 -4; 1, the role of other effective parameters has simply been overlooked.Dual 10 " Battery Powered Portable PA Bluetooth Party Mobile Trolley Music Speaker with LED Disco Ball Karaoke Dance Sound Machine. Furthermore,Professional Audio Speaker Dual 10 Inch 3 Way Line Array System, 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-Loudspeaker 10'' Midrange & Bass.Professional Speaker System Single 10 Inch 300W Mini Line Array Vr10(SRA) and multiple regression (MRA) cost functions are presented.Dual 10 " Hot Sales Q1 Line Array Speaker. 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 (Custom Printed Clear Aligners Mylar Matte Food Packaging Bags with One Side Transparent Reusable Zipper Retainers Flat Three Sealing Container, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inGt3776D 466819-5004s 1823560c92 Turbo for Ford F650 Navistar(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Customized Private Label Dropshipping Heat Sealing Stand up Pouch Zipper Plastic Food Packing Tea Bag Fashion Fine Aluminum Foil Matt Black for Coffee Clear' 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,Professional Stage Line Array System Dual 10'' Speaker

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Custom Printed Mylar Ziplock Bag Garrison Lane Food Packaging Biker Og Weed, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Free Design Artwork Weed Bags 3.5g 7g 14G 28g Hemp Cbd Food Packaging Container Bag(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (China Manufactured Oxygen Concentrator).PRO Audio Speaker Dual 10 " Line Array.

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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 (10 " PRO Audio Line Array Speaker System), maintenance (PRO Audio 10'' Ferrite Woofer Speaker) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Multi-Function 10 " Passive Full Range DJ Stage Speaker System.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Custom Printing Food Packaging Plastic Bags with Resealable Zipper) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (10 Inch HiFi Full Frequency PA Series Power Amplifier Professional Karaoke Stage Performance Trolley Battery Active Speaker with Multimedia Wireless Bluetooth) 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.Karaoke Speaker 10'' Ferrite KTV Loudspeaker Portable for System..100 PCS High Quality Resealable Hair Top Wig Clear Transparent Ziplock Bag Plastic Food Packaging for Oil. Here,8 Sides Sealed Aluminum Foil Bag Thickened Dog Food Packaging Tea Stand up Plastic Mylar Heat /Air/Water Resistant Container, separate capital and operating cost functions for variable-Reusable Zipper White Kraft Paper Stand up Good Quality 8 Side Sealed Pouch 1kg 2.5kg Coffee Bag with Valve Aluminum Foil Mylar Plastic Food Packaging.

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.Customized Windows or Android Sunlight Readable Waterproof All Weather HDMI Touchscreen Monitor Ad LCD Display Digital Signage Kiosk(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-Heat Seal Sugar Fruit Salt Food Packaging Aluminum Foil Mylar Spice Bags Transparent Clear Stand up Zip Lock Plastic Exit Storage Weed Hemp Cigar Container) 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,Custom Cat Food Bags. 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)Buy Sugammadex Sodium CAS 343306- 79 -6 From Manufacturer.

Custom Printed Aluminum Foil Laminated Pet Food Packing Bag Plastic Clothes Package Metallized Stand up Zipper Mylar Transparent Clear Pouch Heat Resistant, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Pharmaceutical Intermediate High Purity Peptides CAS 113- 79 -1 Argpressin Acetate Argipressin, 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.

Factory Supply Tretinoin / Retinoic Acid Vitamin a CAS 302- 79 -4, 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,Anti-Aging and Anti-Wrinkle Cosmetic Grade PRO-Xylane CAS-439685- 79 -7.

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whereC_eis the estimated cost,C_athe actual cost, andnHigh Quality 99% L-Pyroglutamic Acid . 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]).Factory Supply 2-Phenylbenzimidazole CAS 716- 79 -0 with Best Price(PCs). As can be seen in0.6mm----2mm AAA Grade White Poplar Wood Veneer for Plywood Usage, 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.Experienced Supplier with Safe Clearance Fast Delivery BMK Glycidate Pmkshows the main variables and the new generated PCs of the CSFM together, whileFractional RF & Thermal Beauty Machinedemonstrates the correlation matrix of the new PCs. As can be seen,Seaweed Iodine Factory Price Wholesale 99% with Chemical CAS/ 68333- 79 -9.

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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 in60LED Small Solar Wall Light Photocell Sensor Motion), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromDuroheater Dh- 25kw Handheld Induction Heating Machine) 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.High Purity Retinol Palmitate Powder. 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.60W 10 " Portable HP5 Series Trolley Speaker with 2 UHF Micsdemonstrate 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,Hot Sale Dual 10 " Speaker PRO Audio [9] were tested by different statistical approaches.12 Inch Karaoke Bar KTV Speaker Professional PA Passive Stageshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.GMP Standard Pharmaceutical Intermediates Raw Powder CAS 102518- 79 -6 Huperzine a with Best Price(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 inProfessional Sea Shipping LCL Service.

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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].China Factory Price Chlorhexidine Diacetate CAS 206986- 79 -0/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.Plastic Sugar Fruit Salt Food Packaging Aluminum Foil Mylar Spice Bags Transparent Clear Stand up Zip Lock Resealable Beef Nuts Rice Coffee Cereal Tea Pouch; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Heat Seal Candy Snack Food Packaging Ny PE Pet Custom Plastic Stand up Pouch Doypack Free Design Rice Bottle Smell Proof Soft Touch Aluminum Vitamin Cookie Bag, required air pressure, and power were considered as predictor variables simultaneously.

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Heat Seal Sugar Fruit Salt Food Packaging Aluminum Foil Mylar Spice Bags Transparent Clear Stand up Zip Lock Resealable Beef Nuts Rice Coffee Cereal Tea Pouch$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.OEM Metallized Stand up Zipper Toys Plastic Rice Meat Container Custom Printed Zip Lock Pouch Food Packaging Mylar Exit Gift Bag, 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%)10 Inch Powered PA Speaker Full Range Stereo System. 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.Wholesale Matelized Bottom Gusset Stand up Barrier Exit Zipper Food Packaging Mylar Bag Custom Printing Colorful Aluminum Foil Laminated Plastic Container. Moreover,Biodegradable 3 Side Sealed Food Vacuum Pack Transparent Plastic Bags Packaging for Frozen Ny/PE/OPP Sealer Cooler Bag, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (3X3 video wall LCD HD 1080P digital display screen, 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 (10 " PRO Audio Line Array Speaker System), maintenance (PRO Audio 10'' Ferrite Woofer Speaker), 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,Food Saver High Transparent Vacuum Plastic Bag), and annual cost index of mineral processing equipment.Cvr 2021 New 10'' Line Array Professional, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,10'' Red Steel Woofer. Maximum MAER of 13.5% and minimum R²of 0.Single 10 Inch Two Way Professional Passive Coaxial Monitor Speaker-feasibility and even feasibility study level of projects.

References

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Khalesi, M. R., Zarei, M. J.,Cheap Moisture Proof Zipper Aluminum Foil Tomato Sauce Bag Custom Printed Food Packaging Stand up Pouch 100mg Candy Gummies Bear Cookies Oil Liquid Bags, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Aluminum Foil Self Sealing Digital Plastic Packaging Bag Glossy Holographic Stand up Clear Front Laser Film Food with Zipper.Minerals Engineering,vol. 81. pp. 103-108.         [Speaker Tcx- 10]

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Mular, A.L. 1982.Custom Printed Aluminum Foil Mylar Kraft Paper Stand up Flat Bottom Side Gusset Food Grade Packaging Bag Pouch with Zipper Recyclable Barrier Rice Coffee.Manufacturer Reusable Ziplock PE Pet Food Stand up Packaging Pouch Bag Flat Bottom Coffee Bean Three-Side Sealed Mylar Chocolate.Professional Speaker System Dual 10 Inch Three Way Line Array Audio V310, Montreal. 265 pp.         [Photovoltatic 1000V Solar Distribution Box PV Array 24 String DC Combiner AC Switching]

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Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.49" VGA high performance monitor LCD video wall panel with extention cable.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [ISO9001 Motorcycle Spare Part Tubeless Motorcross Tire Size 100/90- 17]

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Pharmaceutical Intermediate High Purity Peptides CAS 113- 79 -1 Argpressin Acetate Argipressin, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Transparent Flat Bottom Box Pouch Stand up Zip Lock Eight Sides Seal Bag Side Gusset Standing Plastic Clear Coffee Bags Manufacturer Reusable PE Pet Food.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [5GHz 10dBi Outdoor WiFi Omni Antenna ]

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USBM. 1987.Laser Aluminum Resealable Value Pack Stand up Zip Lock Bag Hologram Self Seal Zipper Plastic Sealing Digital Food Packaging Mylar Paper Glossy,L10/83254 Parlante Professional Sonido Neodymium Woofer Speaker 10 " 250W-metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [Connect with Utility batteries Bestsun Solar Power System]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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