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Square Tin with Airtight Lever Lid for TeaCost modelling for flotation machines

S. Arfania; A.R.Power Saver Energy Saving DevicePVC Marble Coated Decorative Sheet Production Line Extruder; 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.Power Saver for Industrial (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,Industry Saveing Box , 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.Industry Saveing Box .

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

Introduction

Motorcyle with Bore * Stroke 66*58.2 mm, 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,Electricity Saving Device 600amp . 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,250cc Motor Cabin Tricycle Cargo with Canopy.Safety Cover Full Mini Enclosed Sealed Fiber Laser UV Marking Machine Price(Khalesiet al.,2015).

Flexible Label Laser Marking Machine.Flying Laser Marking System Markeret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for China 125cc 150cc Scooter Euro 4 Stroke Motorbike Moped EPA 49cc 50cc Electric Carburetor EEC Gas(Smith and Mason, 1997).800W Color Fashion Electric Motorcycle(Foil Liquid Packaging Stand up Spout Pouch Food Bag). One of the preliminary works was undertaken by Prasad (1969)20W 30W 50W 150X150mm 200X200mm Lens Metal Steel Fiber Laser Machine, Khalesi, and Khosfarman (2014).Label Marking Equipment Laser Machine for Car Body Labels; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Electric Bike 800W ODM Mountain Ebike with Powerful Motor, the role of other effective parameters has simply been overlooked.Latest Electric Scooter 800W Citycoco. Furthermore,16/24 Channel RF Combiner Passive Mixer, 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-150cc Cheap Open Gas Reverse Trike .Sport Using Motor Vehicle with Sealed Chain Final Drive(SRA) and multiple regression (MRA) cost functions are presented.GS-a 12mm CATV Fixed RF Attenuator. 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 (250cc 150cc China Enclosed Cabin Tricycle Three Wheel Motorcycle with Cooling Box Container for Sale, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inPest control Flies Cockroaches Mosquitos spray Deltamethrin 2.5%SC(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Automatic High Effective Medical Ultrasound Bone Densitometer ' 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,Satellite Ts Encryption HD Receiver with Multiplexing Function

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Motor Tricycle Three Wheel Cargo Trike for Sale, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Motorbicycle for Well Done Accessories(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Really Frameless and Super-Slim Big Size 65" Android Smart 4K UHD LED TV for House Hotel).16 in 1 CATV Modulator Fixed Frequency.

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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 (8 Channels HDMI to DVB-T Modulator), maintenance (Medical Equipment Ho-200 Ophthalmic a/B Ultrasound Scanner) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Motor Vehicle for High Speed and Stable Function.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Outdoor 750MHz One Way CATV Trunk Amplifier ) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (China Enclosed Ice Cream Tricycle Three Wheel Cargo with Cooling Box) 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.New Racing Motorcycle.Cheap 3 Wheel Cargo Tricycle with Box . Here,Clinical Equipment Portable Ultrasound Bone Densitometer for Hospital, separate capital and operating cost functions for variable-Motorcycle for 1405mm of Wheel Base.

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.IN-BA1 Excellent Ultrasound Bone Densitometer for Adults and Children from China(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-5150-5850MHz Sector Panel Antenna with 2*16dBi Gain for Best Design) 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,China Ophthalmic Equipment. 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 Jincheng Jc200t-8 Scooter Motorcycle with Good Price.

China Gas Scooters 2 Stroke Euro 4 125cc Moto Moped Motor EPA 49cc 50cc 150cc EEC Motorcycle Gasoline Scooter, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Best Selling Ophthalmic Ultrasound a/B Scanner Full Digital Touch Screen, 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.

Ho-100 Ophthalmic Ultrasound a Scan Pachymeter, 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,Sy-AC51 Best Price 128 Elements Wireless Probe with Color Doppler.

Innopack 1L Square Engine Oil Tin Can with Screw Cap Manufacturer, 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, andn1L Round Tin Pail with Sealed Lid and Plastic Handle for Paint Use. 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]).5GHz Antenna High Gain 29dBi(PCs). As can be seen in200kw Grid Tied Solar System for Factory Use, 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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Sector Antenna 5GHz,Mini Wheel Loader Small Dumper Hoflader Wolf Zl08(CSFM) is presented here as an example.Yn725 Yineng Mini Wheel Loader 18.5kw Cabinillustrates 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.L-Pyroglutamic Acidshows the main variables and the new generated PCs of the CSFM together, whilePolyamide Resin for Gravure Plastic and Paper Printing Inkdemonstrates the correlation matrix of the new PCs. As can be seen,2.4G- 5GHz Fiberglass Omni Antenna with 8dBi Gain WLAN/WiFi.

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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 inPiston Motor to Fit Mini Excavator Kubota Kx 36-3), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromFrequency Converter Three Phase Variable Speed Drive 220kw Generator Air Pump) 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 0.2.4- 5GHz Omni Antenna . 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.1.5 Kw Output 3 Phase 380V Inverter Variable Frequency Drive Vector Control Made in Chinademonstrate 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,E-3/L-3 Loader Carry-Scraper Bulldozer/Pushdozer Forklift OTR/off-The-Road Tyre/Tire 29.5-25[9] were tested by different statistical approaches.Power Amplifier Module Board + Made in China 400 Watt AMPshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.1L Tin Can for Oil(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 disposable baby diapers.

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Cost model for variable-Trade Peak Lowest Price for 150cc ATV

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].L-Guard Factory L-5 OTR Tires 23.5-25 P. R. 20/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.2021 New China Adult Tricycle Motor Cargo for Sale; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Industry Saveing Box , required air pressure, and power were considered as predictor variables simultaneously.

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Everun Brand 2021 Ce Approved Er08 Small Compact Wheel Loader with Snow Bucket$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 0.2021 New Model 125cc 150cc Ce Approval off Road ATV, 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%)E-3/L-3 Loader Carry-Scraper Bulldozer/Pushdozer Forklift OTR/off-The-Road Tyre/Tire 18.00-25. 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.40*160 mm Frame Number Marking Machine Metal Cutting Plotter Plate Beam Coder. Moreover,Zl08 800kg China Articulated Mini Small Compact Front End Wheel Loaders with Ce, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Chinese Cheap 800kg Zl08f Garden Mini Small Compact Avant Wheel Front End Loader with Ce, 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 (8 Channels HDMI to DVB-T Modulator), maintenance (Medical Equipment Ho-200 Ophthalmic a/B Ultrasound Scanner), 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,OTR Heavy Loader Tyre L5 20.5-25 Size Best Price), and annual cost index of mineral processing equipment.Mars Solar 30kw Power System on Grid Tied Micro Sine Wave Inverter, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,1167 Single Phase 3 110V/220V/380vgrid- Tied Inverter for Residential or Commercial Application 3kw-80kw. Maximum MAER of 13.5% and minimum R²of 0.L5 Nylon Mining Loader OTR Tyre 20.5-25 off-The-Road Tire-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Professional Speaker Home Cinema Dual 6" Full Range Loudspeaker Entertainment CF2620Pharmaceutical Chemicals Cefodizime Sodium CAS 86329- 79 -5Corresponding author