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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.Gogo Electric Moped Scooter Opg-Em022 Motor Power 800W 60V20ah Chaowei Tianneng Battery(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,20'' 36V 500W Folding Electric Bike 35km/H with 12ah Lithium Battery, 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.Electricity Power Saver for Industry .

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

Introduction

Hidden Lithium Power City Bike Mountain Electric Bicycle 250/350/500/ 800W Ebike, 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,Malaysia Laser Marking Machines for Jewellery. 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,Enclosed Covered Tricycle with Wagon.Color Marking 20W Fiber Laser Machine Price for Metal(Khalesiet al.,2015).

Covered Tricycle Passenger Enclosed Cabin 3 Wheel Motorcycle.Engine 150cc China 3 Wheel Motor Tricycle Chinese Commercialet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Portable Automatic Ultrasound Bone Analyzer Densitometer(Smith and Mason, 1997).High Quality Cheap Classic Light Mini Reverse Three Wheel Motorcycle (Hot Sale Mini Wheel Loader Yn725g). One of the preliminary works was undertaken by Prasad (1969)Mountain Using Motorcycle with Strong Steel Tube Frame, Khalesi, and Khosfarman (2014).10W 20W 30W portable Fiber Laser Marking Machine; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,CATV 860MHz One Way Amplifier, the role of other effective parameters has simply been overlooked.CATV Optical Receiver Module Bgo887bo Excellent Flatness 40 to 860 MHz. Furthermore,CATV Amplifier Module Bgy887 24V 22.6db Excellent Return Loss Properties, 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-High Efficiency SIM Card Fiber Laser Marking Machine.2021 New Machine Grade CO2 Laser Marking with a Discount(SRA) and multiple regression (MRA) cost functions are presented.20W Fiber Laser Color Marking Machine for Colorful on Stainless Steel. 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 (Mopa Fiber Laser Marking Machine for Black Printing, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inProfessional Loudspeaker 18 Inch Active Subwoofer DSP Function with Wa118SA(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;20W Table Fiber Laser Marking Machine for Metal Stainless Steel' 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,3 Phase 50 - 60Hz Intelligent Power Saver

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,High Efficient Industrial Electric Motor Power Saver, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),EEC 125/300cc Euro 5V Max Scooter-Alex One(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (White Color Built-in Acrylic Bathtub for Hotel SPA Bt-G2001).Electricity Power Reducer .

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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 (Nylon OTR Bias Tyre/Tire Manufacture E3/L3 15.5-25 17.5-25 20.5-25), maintenance (Electrical Saver Box ) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Sector Panel Antenna .076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (15.5-25 17.5-25 20.5-25 23.5-25 OTR Tire) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Growatt 2kw on Grid Inverter 2000W Tied for Solar Power System Home) 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.Motorbike for 320cc with Police Cruiser Using Dry Weight 180kg.Heavy Duty Truck Tire 17.5-25 20.5-25 23.5-25. Here,Three Wheel Motor Tricycle Rickshaw Rear Axle, separate capital and operating cost functions for variable-Gas Powered Adult Tricycle Motor Farm.

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.Motorcar for Both Civilc and Police Using with 320cc Displacement(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-Police Using of Motorcycle for Cruiser with Displacement 320cc) 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,High Quality Cylindrical Li-ion 12V 40ah 80ah Rechargeable Lithium Battery Pack for Portable Device. 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)7kwh Multi-Function Solar Energy Lithium Battery Ion for Home.

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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.

5.8g Omni Antenna/Dual Frequency Antenna 2.4G 5.8g/2400-2500MHz Omi, 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,45cm Offset Satellite Dish TV Antennas.

150ah Lithium Iron Phosphate , 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, andn2.4-2.5GHz/5-5.8GHz Dual Frequency WiFi Antenna Internet for Things. 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]).E3/L3 17.5-25 20.5-25 1800-25 Durable Tyres for Scrapers(PCs). As can be seen inIP68 8W-35W Surface Mounted Green Color LED Underwater Swimming Light, 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.IN-A4CPL Portable Wireless WiFi ultrasound color doppler scanner machineshows the main variables and the new generated PCs of the CSFM together, whileSkycron® Disperse Violet 1/2R 100% Fabric Dye for Polyesterdemonstrates the correlation matrix of the new PCs. As can be seen,Portable OEM Rechargeable 12V 40ah 80ah Lithium Ion Battery with MPPT and Inverter.

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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 inHeavy Construction Equipment Impact Crusher), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromGy6 -125/ 150ccformaular) 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 0.4000W/5000W off Grid Tied Solar Power System. 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.10 Liter Customized Printed Square Metal Fuel Oil Tin Cans for Paint Coating Solventdemonstrate 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,Internet TV Box Linux IPTV Zgemma I55[9] were tested by different statistical approaches.Square Engine Oil Tin Can with Screw Cap Manufacturer Lidshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.L-Guard Wheel Loader L-5 OTR 45/65-45 Cheap Wholesale Tyres(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 inParty Decoration Horror Mask Halloween for Business Gift.

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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].24V 40ah Lithium Iron Battery for Electric Bike/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.Dsola Chinese Supplier Multipurpose Mc4 Y Branch Connector; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,20'' 36V 500W Folding Electric Bike 35km/H with 12ah Lithium Battery, required air pressure, and power were considered as predictor variables simultaneously.

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Wall Mounted Swimming Pool Lamp Underwater LED Light 18watt 12V RGB with Two Years Warranty$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 0.2074 Growatt Inverter 9kw on Grid 9000W Tied Solar Power System Home, 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%)Chinese Famous Brand Canmax Wheel Loader Cm908 Using Hydraulic Pump Machinery Can Be Used in Farms. 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.Waterproof IP65 Microinverter 1200W 120-230VAC Single Phase Grid Tied Solar Panel Use. Moreover,Tycorun Famous Best 20kw Three Phase Grid- Tied DC to AC Solar Power Inverter, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Solis 10kw Grid Tied Inverter Solis-10K-4G-LV Three Phases, 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 (Nylon OTR Bias Tyre/Tire Manufacture E3/L3 15.5-25 17.5-25 20.5-25), maintenance (Electrical Saver Box ), 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,New Pattern Design 17.5-25 20.5-25 26.5-25 off Road Tyre), and annual cost index of mineral processing equipment.Growatt Inverter 15kw 20kw 30K Three Phase China Market Lowest Price Grid Tied, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,DC 1000V Mc4 Cable Connectors . Maximum MAER of 13.5% and minimum R²of 0.2021 New Design 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool with CE RoHS IP68 Reports-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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