GENERAL PAPERS

Sulfasalazine CAS No. 599- 79 -1Cost modelling for flotation machines

S. Arfania; A.R.1L Custom Metal Round Tin Cans Box Packaging for Glue Coating SloventFrequency Inverter Pump AC Drive Price; 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.1L /1000ml Extra Virgin Olive Oil Metal Can(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,1L Olive Oil Can Cooking Empty Tin Can/Pot Metal, 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.Heavy Loader 5wheel Cargo Tricycle with Cabin.

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

Introduction

High Precision and Fast Speed Nonmetal CO2 Laser Marking Machine, 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,Motor Cargo Tricycle for 2-3ton Loader. 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,1L Empty Round Tin Can with Plastic Lid Manufacturer.1L Extra Virgin Olive Oil Metal Can with Cover(Khalesiet al.,2015).

Solar & Mains 3840wh 80A 220V Outlet Battery for Appliances with Rated Power Under 1500W.Gy6 -125/ 150ccformaularet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 11 Kw Synchronous Motor Close Loop Inversor AC Drives VFD Frequency Inverter Power(Smith and Mason, 1997).Double Chasis Cargo Tricycle(Solar Energy System 3kwh Power Home Built in Inverter). One of the preliminary works was undertaken by Prasad (1969)Euro 5 Gy6 -50cc 4t Moped, Khalesi, and Khosfarman (2014).Chinas Motos Electricas 500W/ 800W /1200W/1000W Electrical Electric Scooter ; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Water Proof Closed Box Delivery Tricycle, the role of other effective parameters has simply been overlooked.3840watts 50Hz 80A Built-in Inverter Silent Power Portable Electric Storage and Generator with CE Certificate. Furthermore,Barrow Mini Dumper with Three Wheels, 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-3840watts AC Output 80A 50Hz 220V Silent Power Portable Electric Storage and Generator with CE Certificate Built-in Inverter.Oil Petrol Anti Corrosive Tantalum Diaphragm Pressure Sensor(SRA) and multiple regression (MRA) cost functions are presented.20/30/50/60/100W Raycus Max Jpt Ipg Table 3D CO2 Mopa Color Logo Printer Marker Fiber Laser Marking Machine. 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 (Gy6 150cc EEC Scooter, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in5GHz Antenna High Gain 16dBi Panel(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;250W- 800W Handicapped Mobility Scooter for Old People with Basket' 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,Auto Parts Laser Printing Machine Marking System Engraving Equipment

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Water-Proof Cover 3 Wheel Cargo Gasoline Trike, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Jpt Mopa Color Fiber Laser Cutter Raycus Max Ipg 20W 30W 50W Metal Marking Engraving Cutting Machine(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Custom Metal Craft Die Cast Zinc Alloy Silver Commemorative Medal).2021 Most Hot Selling Electric Mope E-Motorcycle 500W- 800W.

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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 (Energy Storage Portable Generator 3840watts Built-in LiFePO4 Enjoys 2 Years Warranty), maintenance (30W CO2 Touch Screen Laser Marking Coding Engraving Machine) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,with Built-in LiFePO4 Energy Storage Portable Generator 3.8kwh Enjoys 2 Years Warranty.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Solid State Inductive Heating Furnace for Tyre Cord Wire) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Factory Supply Biomass Rice Husk Charcoal Making Machine) 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.Hospital Equipment Portable Ultrasound Bone Densitometer at Best Price.Ce Approved Ho-100 Eyes Hospital Use Ophthalmic Ultrasound Scanner. Here,Outdoor/Home Use Built-in LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty, separate capital and operating cost functions for variable-Low Failure Rate High Efficiency Induction Metal Heating Machine .

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.Portable Ultrasonic Ophthalmology Ophthalmic a/B Scan(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-Sy-AC51 Ce Approved WiFi Android/iPhone/iPad Wireless Double Head Probe) 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,Camping Power / RV LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty. 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)Hot Sale Mini High Frequency 25kw Induction Heater Price.

Convex Series Probe Type Wireless Mini Ultrasound Scanner, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (2ND Generation Ultrasound Bone Densitometer, 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.

Hot Selling 2ND Generation Ultrasound Bone Densitometer, 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,Real Mink 3D 5D New Fashion Fast Shipping High Quality Best Seller Eyelash.

High Quality Economic Ultrasound a/B Scan for Ophthalmology , 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, andnUt-O500 Diagnosis System Portable Full Digital Ophthalmic Ultrasound a/B Scan for Eye. 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]).Ophthalmic a Scan and Pachymeter Combined Unit(PCs). As can be seen inUpgraded New Grille Skytone Vera 12inch Top Plus 18inch Sub Line Array PRO Audio DJ System, 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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1000MHz FTTH Trunk Line CATV Mini 2 Ports Signal Amplifier,Roadside Emergency Set Auto Car Tool Kit(CSFM) is presented here as an example.Kraft Paper LDPE Supermarket Vegetable Cosmetic Fruit Packaging Bagillustrates 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.Made in China PA Speaker System Three Way Loudspeakersshows the main variables and the new generated PCs of the CSFM together, while2021 Best Selling Dual Battery Pedal Assisted Electric Scooter Bicycledemonstrates the correlation matrix of the new PCs. As can be seen,SA831r Outdoor Return Path CATV Trunk Amplifier.

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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 inPengpu 320HP Dozer Pd320y-1 Compact Crawler Bulldozer with Cheap Price), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromFree Sample Local Anesthetic Novocaine Painkiller Cream Solution Procaine CAS: 51-05-8) 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.Portable Induction Heater for Crystal Growth. 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.Okoume Veneerdemonstrate 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,Dry diaphragm membrane sanitary pressure transducer[9] were tested by different statistical approaches.off Grid PV Panel Generator Solar Energy Power System 3kwh for Home/Outdoor Lightingshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Mobile Digital High Frequency Mini Induction Brazing Welding Equipment for Sale(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 inWholesale 1.5m Artificial Decorative Christmas Tree.

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Cost model for variable-High Frequency Induction Heater

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].Industrial Vacuum Atmosphere Hot Pressing Sintering Furnace/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.Softel 4u 12 Channel Agile CATV Analog RF Modulator; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,1L Olive Oil Can Cooking Empty Tin Can/Pot Metal, required air pressure, and power were considered as predictor variables simultaneously.

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High Quality Melamine MDF with Competitive Price Ce Carb Grade$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.Glue E1 Fsc Carb Green/Red Core Plain Mositure-Proof MDF, 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%)The Best Sale and Low Price Chinese Brake Lathe . 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.Melamine MDF E1 E0 Carb P2 Grade. Moreover,Transparent Ceramics Hot Press Sintering Furnace, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (6mm Raw Plain MDF ISO9001/ Carb for Decoration, 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 (Energy Storage Portable Generator 3840watts Built-in LiFePO4 Enjoys 2 Years Warranty), maintenance (30W CO2 Touch Screen Laser Marking Coding Engraving Machine), 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,ISO), and annual cost index of mineral processing equipment.Se0/Fsc/ Carb Naf 18mm MDF Board, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,HPM410W Submerged Integrated Level Sensor Transmitter. Maximum MAER of 13.5% and minimum R²of 0.Industrial Mining All Welded Anti Explosion Pressure Transmitter-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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