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On-line version ISSN2411-9717
Print version ISSN2225-6253

J. S. Afr. Inst. Min. Metall. vol.117 n.1 Johannesburg Jan. 2017

http://dx.doi.org/10.17159/2411-9717/2017/v117n1a13Â

GENERAL PAPERS

Supply Rubber Accelerator Mbt 2-Mercaptobenzothiazole CAS No.: 149-30-4Cost modelling for flotation machines

S. Arfania; A.R.800W Electric Motorbike with Front Disc BrakeRosen 8kw Grid Tied on Solar Panel System; 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.Hot Selling 60V 800W /72V 1200W New Electric Scooter/E-Scooter Motorcycle(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,dB002e Hot Sell Electric Motorcycle 800W and Kids 500W with Ce for, 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 0.350W/500W/ 800W /1000W/1200W Motor Electric Scooter EW-519 Classis Model.

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


Introduction

800W 60V20ah Lead-Acid Battery Electric Scooter Motorcycle, 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,New Energy Pedal Electric Scooter Max Speed 35km/H 350W 500W 800W Motor Power. 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,5GHz 30dBi Grid Parabolic Antenna .5GHz Dish Parabolic Antenna 29dBi(Khalesiet al.,2015).

2.4/ 5GHz Dual Band H-Pol Sector Antenna.Electric Dirt Bike Zm-Es18 with 500W- 800W Motoret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 99% Amide Type Lidocaine Prilocaine Cream USP 2.5% Local Anesthetic Raw Powder CAS: 1786-81-8(Smith and Mason, 1997).5GHz 20dBi Enclosure WLAN Antenna(High Barrier Vacuum Bag& Packaging Films for Food Pakcing). One of the preliminary works was undertaken by Prasad (1969)5GHz 45deg Dual Pol Sector Antenna, Khalesi, and Khosfarman (2014).5GHz 23dBi Enclosure WiFi Antenna; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,5GHz Dual Pol Sector Antenna with Enclosure , the role of other effective parameters has simply been overlooked.5GHz 34dBi Dish WLAN Antenna. Furthermore,5GHz 18dBi Dual Polarization Sector WiFi Antenna, 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-18W RGB Resin Filled LED Surface Mounted Underwater Pool Light.Poplar Film Faced Plywood Board with Carb Certificate(SRA) and multiple regression (MRA) cost functions are presented.18W 12V IP68 Waterproof LED Swimming Pool Lamps. 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 (Hot Sale on-Grid 20kw Grid Tied Solar Power Home System, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in1250X2500mm Rotary Cut Okoume Veneer Cheap Prices(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;E1 Glue Malamine Mositure-Proof MDF with Carb Certification' 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,New Condition Large Capacity Mini Truck Dumper

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,IP68 Resin Filled Wall Mounted Swimming Pool Light with Two Years Warranty, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),50cc 150cc 200CCC 300cc Adult EPA/Ce 3 Wheel Gas Scooter(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Factory Directly Sale 12V 1.5A 15 Volt 1.2 AMP AC DC Power Adapter).2021 Hot Sale Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with Edison Chip.

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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 (150ml Plastic Clear White Bullet Liquid Bottle for Cosmetic Industry), maintenance (14" to 22' Inch Replica Aluminum Alloy Wheel for KIA Rims) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Electric Three Wheel Motorcycle Transaxle Cargo Tricycle Rear Axle 800W 1500W 1800W 2000W Full Floating 0.5ton~1.2ton Accessories.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (300cc Cargo Tricycle of Asia Market) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Building Material Commercial Plywood with Carb to Europe) 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.AL908 800kg Rated Load Wheel Loader with CE Approved for Sale.China Jiaxing Jarol Frequency Inverter 0.75kw/220V New. Here,Portable Laptop Digital Automatic Ultrasound Bone Densitometer, separate capital and operating cost functions for variable-Haiqin Brand 0.8ton Mini Loader .

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.Jarol Solar Inverter 5.5kw 3 Phase(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-Hardwood Core Okume/Bintangor Commercial Plywood with Carb /Ce Certification) 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,Textile Crane Centrifugal 380V Variable Frequency Drive VFD. 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)2021 Hot Sale Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with CE RoHS IP68 Reports.

AL908 Wood Gripper Wheel Loader with Euro III Engine for Sale, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Inverter Cabinet VFD Frequency AC Drives 15kw Motor, Khalesi, and Khosfarman, 2014).

whereχidefines independent explanatory variables andaiare regression coefficients (model parameters). As was mentioned, independency ofxivariables 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.

2021 New Design Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater 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]:

whereXobsis the observed value,xethe estimated value at time/placeI,and n,12V RGB Resin Filled Underwater Pool Lights with 2 Years Warranty.

loader with excavator grapple wheel mini for sale good quality, 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).

whereCeis the estimated cost,Cathe actual cost, andn24V 100ah /Lithium Battery 48V 3kwh Lithium Ion LiFePO4 60ah/70ah /80ah /90ah /120ah /150ah 200ah /300ah /350ah. 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]).2ND Generation Ultrasound Bone Densitometer(PCs). As can be seen inJwell- PP PS Plastic Environmental Protection Sheet Recycling Making Extrusion Cup Machine Production for Green Food Container and Packaging Good Price, 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 andXias Equations [5] and [6]:

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In this research, main variables ofX1, X2... Xnwere 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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Wholesale Factory Lithium Ion Battery 12kwh 48V 100ah 250ah 300ah for Home Energy Storage System,High Effective Automatic Ultrasound Bone Densitometer(CSFM) is presented here as an example.Frequency Drive Converter Solar Pump Inverterillustrates 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.2004-10 for Volkswagenshows the main variables and the new generated PCs of the CSFM together, whileGrowatt Solar Inverter 17kw 20kw 25kw Grid Tied Three Phase on Power Systemdemonstrates the correlation matrix of the new PCs. As can be seen,Low Price Ophthalmic a-Scan Ultrasound with Pachymeter Ho-100.

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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)

whereXiare main technical variables (like power or required air),aiare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inFlat Pattern Polyurethane Sandwich Garage Door), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromWholesale Factory Price CAS: 16648-44-5 BMK Glycidate Powder) 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 0.4.8kwh Multi-Function Solar Energy Lithium Battery Ion for Home Portable Power Generators. 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.China Suppllier Ammonium Sulphate 21% Nitrogen Fertilizerdemonstrate 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,Lithium Prismatic Cells 40V 60V 72V LiFePO4 Battery Li-ion for Solar and EV[9] were tested by different statistical approaches.55 Inch LCD Video Wall Display with Controllershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Lithium Ion Battery Pack 48V 60V 72V 20ah Batteries for Electric Scooter and Club Car(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 inFactory Price 30oz 20oz Mixed Package Stainless Steel Hotsale Models Teti Tumbler for Wholesale China.

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Cost model for variable-12V 24V 48V 40ah Lithium Battery Solar 100ah 150ah 200ah 300ah 400ah 500ah Energy Storage

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].5L Metal Round Cans for Paint or Chemical Packaging/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.150cc Motorcycle; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,dB002e Hot Sell Electric Motorcycle 800W and Kids 500W with Ce for, required air pressure, and power were considered as predictor variables simultaneously.

5L Vegetable Cooking Oil Custom Tinplate Square Can. Moreover, the operating cost was detailed in different cost items.Hot Sale Coolest China Cheap Electric Motorcycle 500W/ 800W /1000W/2000W Scooter, indicated inModern Design Rk3318 Android 4GB RAM 32GB ROM HK1 Cool Free Internet Octa Core 9.0 Set Top TV Box, and major extrapolation should be avoided.

Wholesale Plastic Square 1 Liter Fertilizer Bottle$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.Accredited Ce E Bike Batteries 36V 48V Ebike Battery 10ah-40ah Lithium, 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%)50cc Motorcycle. 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.Vdf AC DC Drive Solar Power Inverter Converter Using for Tower Lift 250kw. Moreover,Zhenhua Classic Motorcycle Dax 125cc Euro4, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Super Cooling Smart Electric Scooter 500W 800W Motorcycle, 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 (150ml Plastic Clear White Bullet Liquid Bottle for Cosmetic Industry), maintenance (14" to 22' Inch Replica Aluminum Alloy Wheel for KIA Rims), 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,Wholesale 1L Round Empty Fully Synthetic Brake Oil Tin Can with Metal or Aluminum Caps), and annual cost index of mineral processing equipment.Scooter / Motorcycle Electric Motor Power 800W 1kw 2kw 3kw, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,5GHz Dual Pol Sector Antenna with Enclosure. Maximum MAER of 13.5% and minimum R2of 0.5GHz 18dBi Dual Polarized Enclosure Antenna -feasibility and even feasibility study level of projects.

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USBM. 1987.Replica Aluminum Alloy Wheels for BMW 1/2/3/4/5/6/7 Series,16"X6.0" 16'x7.0' 16X8.0 16X10 Trailer Steel Rim Wheel-metallic minerals expected fossil fuels in the United States and Canada.Openfile report10-87. US Bureau of Mines, Denver, CO. 134 pp.         [300ml Gourd Shape Transparent Green Packer for Moisturizing]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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