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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.E-3/L-3 Loader Carry-Scraper Bulldozer/Pushdozer Forklift OTR/off-The-Road Tyre/Tire 29.5-25(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 Tin Can for Oil, 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.Trade Peak Lowest Price for 150cc ATV.

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

Introduction

L-Guard Factory L-5 OTR Tires 23.5-25 P. R. 20, 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,2021 New China Adult Tricycle Motor Cargo for Sale. 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,Wholesale China High Quality OTR Tyre 17.5-25 G2 Pattern..Suzhou Innopack 1L Metal Rectangular Tin with Screw Cap in Low Price(Khalesiet al.,2015).

Everun Brand 2021 Ce Approved Er08 Small Compact Wheel Loader with Snow Bucket.2021 New Model 125cc 150cc Ce Approval off Road ATVet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Grid Tied 11kw Solar Panel System Home Commercial Power Supply(Smith and Mason, 1997).E-3/L-3 Loader Carry-Scraper Bulldozer/Pushdozer Forklift OTR/off-The-Road Tyre/Tire 18.00-25(Portable Ultrasonic Ophthalmology Ophthalmic a/B Scan). One of the preliminary works was undertaken by Prasad (1969)40*160 mm Frame Number Marking Machine Metal Cutting Plotter Plate Beam Coder, Khalesi, and Khosfarman (2014).Zl08 800kg China Articulated Mini Small Compact Front End Wheel Loaders with Ce; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Chinese Cheap 800kg Zl08f Garden Mini Small Compact Avant Wheel Front End Loader with Ce, the role of other effective parameters has simply been overlooked.OTR Heavy Loader Tyre L5 20.5-25 Size Best Price. Furthermore,Mars Solar 30kw Power System on Grid Tied Micro Sine Wave Inverter, 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-1167 Single Phase 3 110V/220V/380vgrid- Tied Inverter for Residential or Commercial Application 3kw-80kw.L5 Nylon Mining Loader OTR Tyre 20.5-25 off-The-Road Tire(SRA) and multiple regression (MRA) cost functions are presented.Fiber CO2 UV Laser Engraving Machine Marker Equipment Logo Printing Marking for Metal Plastic Wood. 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 (Lithium Polymer Battery Mica 3.7V Mc602540 550mAh Li Pack for Electronic Device, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inCombo Speaker Professional Loudspeaker /Doule 10'' Line Array System(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;New Model High Quality 4 Stroke LED Efi 50cc 100cc 110cc Gasoline Scooter Gas Moped Super Soco Bike Mini' 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,Hot Sale Android 9.0 4K HD IPTV Set Top Box Amlogic S905W 2GB 16GB Smart Internet TV

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Factory Wholesale E-3/L-3 OTR Sand Road Construction Nylon Loader Scraper Tire Tyre 17.5-25, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),25KW Ground Mini loader price(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Global Sunrise Solar Energy with 3W Light *FM Radio*Bluethooth).Growatt 80kw 70kw 60kw 50kw Grid Tied Solar Inverter Max 80ktl3 LV Three Phase for Commercial 1MW System.

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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 (Newest Storage Battery Charger with Solar Energy & Mains Electricity Built-in Inverter), maintenance (Yn725 Yineng Mini Wheel Loader 25kw) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,No Flicker Glare High Purity 18W Underwater LED Swimming Pool Light with Edison Chip.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Yn725 Wheel Loader 25kw Mini) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (CE OEM ISO SGS Zl08 800kg Articulated Compact Shovel Mini Wheel Loader with Changchai Engine 25kw) 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.2.4- 5GHz MIMO Omni Antenna.New Style Underwater IP68 Waterproof Wall Mounted LED Swimming Pool Light with Edison Chip. Here,off Grid Tied Solar Inverter 10kw 15kw 20kw 30kw 50kw 100kw 200kw 500kw 3phase, separate capital and operating cost functions for variable-12V DC/AC 18W/24/30W/40W/55W Resin Filled PAR56 Wall Mounted Swimming Pool Light with 2 Years Warranty.

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.Yn725 Yineng Mini Wheel Loader 25kw(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-IN-AC5L Cheapest 128 Element Color Doppler Echo Android Wireless 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,Factory Sale Big Pickup Tricycle with 300cc Water Cooled Engine. 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)AC12V RGB Mini PC Resin Filled Wall Mounted LED Swimming Pool Light.

12V AC Warm White PC Mini Flat Resin Filled LED Pool Light, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Medical Equipment Portable Automatic High Effective 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.

No Flicker Glare 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with Edison Chip, 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,220V 80A 50Hz Portable Lithium Battery Generator Charger with 3.8kwh for Appliances Rated Power Under 1500W Outdoor & Indoor Use.

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whereC_eis the estimated cost,C_athe actual cost, andn2021 Hot Sale Light Source Be Glued IP68 LED Underwater for Swimming Pool. 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]).4GB32GB 4K Android TV Box Digital Display T95X2 with Amlogic S905X2 Internet Quad Core CPU Media(PCs). As can be seen inPAR56 IP68 Waterproof Outdoor Underwater LED Swimming Pool 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.Transparent Flat Bottom Box Pouch Stand up Zip Lock Bag Eight Sides Seal Side Gusset Standing Plastic Coffee Bean Three-Side Sealed Packagingshows the main variables and the new generated PCs of the CSFM together, whileSingle 15'' Passive/Active Subwoofer with High Quality Plywooddemonstrates the correlation matrix of the new PCs. As can be seen,Solar & Mains Storage Battery Charger with Inverter to 80AC 3840wh.

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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 inWholesale Wireless RGB Mini Projector Night Star Laser Shower Garden Light), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found from5kw Solar-Diesel Generation Hybrid Grid- Tied Power System) 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 0.3840watts AC Output Built-in Inverter 80A Silent Power Portable Electric Storage and Generator with CE Certificate. 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.Professional Speaker Home Cinema Dual 6" Full Range Loudspeaker Entertainment CF2620demonstrate 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,Flying Online Fiber Laser Marking Machine with Conveyor Belt[9] were tested by different statistical approaches.Pharmaceutical Chemicals Cefodizime Sodium CAS 86329- 79 -5shows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.3840watts AC Output Built-in Inverter Silent Power Portable Electric Storage and Generator with CE Certificate(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 inMedical Oxygen Generator Psa O2 Concentrator Air Separation Plant Manufacturer.

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Cost model for variable-Camping Power / RV LiFePO4 Energy Storage Portable Generator 3840wh 80A 220V Enjoys 2 Years Warranty

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].Fiber Laser Marking Color Printing Machine Price 30W 50W 100W Mopa/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.Hot Sale 0.6m 5GHz Parabolic Antenna with Gian 28dBi; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,1L Tin Can for Oil, required air pressure, and power were considered as predictor variables simultaneously.

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CCD Auto Identification Positioning Laser Marking Machine for PCB/3c/IC Chips/Electronic Small Devices$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 0.100W Full Enclosed Fiber Laser Marking Machine with Safe Cover, 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%)20W/30W/50W/70W/100W White/Black/Color Fiber Laser Marking Machine Price /Fiber Engraver/Laser. 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.for HP Laptop Mc06 11.1V 4400mAh 49wh Li-on Battery Envy M7-N000. Moreover,600W- 800W 48V/60V Lead-Acid Battery Electric Scooter, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Best Selling Electric Scooter Mini 800W , 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 (Newest Storage Battery Charger with Solar Energy & Mains Electricity Built-in Inverter), maintenance (Yn725 Yineng Mini Wheel Loader 25kw), 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,150cc Automatic Racing Sports Exclusive Design ATV ), and annual cost index of mineral processing equipment.High Quality Cheap 200cc and 150cc Farm Utility ATV, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,1GHz Outdoor Bi-Directional CATV Amplifier. Maximum MAER of 13.5% and minimum R²of 0.New Mini Willys Jeep Available on 110cc-feasibility and even feasibility study level of projects.

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Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Closed Canvas Box 2 Ton Cargo Tricycle.Sanyou 125cc Efi System with Delivery Box Gas Scooter.2021 Best Sale 150cc Adults 4 Wheeler Petrol Power Racing Quad, Montreal. 319 pp.         [Chin Top Supplier Supply L- ]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.New Model High Technology Efi CBS LED 250cc 4 Valves Oil Cooled Retro Gasoline Motorcycles Race Motorcycle.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [5GHz High Power Outdoor Wireless CPE Ap by Factory Isigal]

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Prasad, L. 1969.Wholesale 90cc 110cc 125cc 150cc off Road Gasoline Go Cart.150cc 200cc 250cc ATV Quad Bike for Adults, Metallurgy and Petroleum, Montreal. pp. 3-15.         [Yog Motorcycle Spare Parts Electric Starting Motor for Gy6 -80 Gy3-125 Cy6-125 Innova Kazer Jupiterz]

Medical Equipment Portable Automatic High Effective Ultrasound Bone Densitometer, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-4 Stroke Buggy 150cc ATV.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [50Hz 60Hz 220V/380V Vector Control AC Variable Frequency Drive]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

Glycolic Acid Cosmetic Grade CAS 79 -14-1 /a-Hydroxyacetic5150-5850MHz Sector Panel Antenna with Gain 13dBiCorresponding author