3HP Three Phase Frequency Converter

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



Mylar Custom Printing Barrier Exit BagCost modelling for flotation machines

S. Arfania; A.R.Manufacturer Wholesale Good Quality Empty 1lt Metal Paint Glue Tin Cans with Lever Flat Pry LidStainless Steel 17-4pH ; M.R. Khalesi

Tarbiat Modares University, Iran


Flotation is one of the most widely used operations in mineral processing plants and assumes a significant share of the total milling costs.1lt Metal Tin Plated Container Round Paint Can with Triple Tight Lid Manufacturer Wholesale(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,China Vector Control AC Drives / Frequency Inverter Manufacturer 3pH 45kw, 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.AC Fan Frequency Inverter VFD Vector Control 3pH 18kw.

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


Inverter Cabinet VFD Multifuctional Frequency Inverters 55kw, 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,AC Fan Frequency Inverter VFD 3pH 15kw. 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,AC Fan Frequency Inverter 3pH 7.5kw.Inverter Cabinet VFD Frequency(Khalesiet al.,2015).

Inverter Cabinet VFD Frequency AC Drive 55kw.Yn725g 18.5kw Cabin Yineng Mini Wheel Loaderet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Yn725 Yineng Mini Wheel Loader 18.5kw Cabin(Smith and Mason, 1997).Yn725g 18.5kw No Cabin Yineng Mini Wheel Loader(1L Paint Tin Cans/Empty Food Grade Can with Lid). One of the preliminary works was undertaken by Prasad (1969)Grid Tied 5kw Residencial Solar Energy System Home Power 5000W Panel, Khalesi, and Khosfarman (2014).Yangtze 100kw Grid Tied Portable Solar System Camping Component; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Yn725g Yineng Mini Wheel Loader, the role of other effective parameters has simply been overlooked.Roof Mounting Solar System 10kw off Grid Tied Power. Furthermore,Screw Top Metal Tin Can, 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-a. S Solar Wholesale Price System Grid Tied Energy Systems 5kw Panels.Best Selling! 15kw Solar System Home Use / 15000W on Grid Tied Roof Ground Panel Power Kit Systems for House(SRA) and multiple regression (MRA) cost functions are presented.Yn725g 18.5kw Cabin Yineng Mini Wheel Loader. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (Yn725g 18.5kw No Cabin Yineng Mini Wheel Loader, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inVimode Electric Scooter Adult Motorcycle for Adults 800W 650W(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Yn725g Yineng Mini Wheel Loader 18.5kw No Cabin' 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,Full HD Media Player Minix Neo N42c-4 N4200 4G 32g Internet Games Online Play Racing Windows 10 Smart Set Top Box Support Google Apk Install

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,6000W Single Phase Inverter Grid Tied Home Solar System, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Complete Set 15kw Grid Tied Solar Power System(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Factory Wholesale High Quality 7PCS Black Diamond Makeup Brush Set).China Cheap Colour Optional Electric Motorcycle for Adults.

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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 (Good Quality 2-Wheel Electric Motorcycle 500-1000W Scooter in Stock), maintenance (Yn725 Yineng Mini Wheel Loader 18.5kw No Cabin) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,China Electric Mobility Scooter Motorcycle with Lights/Electric Bicycle Moped Fast Delivery.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Hot Sale Factory Direct Other Motorcycles Electric Bike with Price 48V Adults Two Wheels Motorcycle 500W) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (World IPTV M3u Subscription 1 Year for Arabic Netherlands Malta Austria Bulgaria Romania Egypt Croatia Africa 9600 Channels Smart TV Android Apple) 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.Factory Price Wholesale Vespa Electric Scooter Motorcycle Adult.Cheaper Long Range off Road Best Selling Hot China Xindazhou Products Motorcycle Electric Adult. Here,2021 Fashion Electric Mtorcycle 2000W Motor China, separate capital and operating cost functions for variable-Mini Dumper Wolf Wl80 Loader with CE.

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.Engine Oil Cans 4 Liter Motor Lubricating Tin Can(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-Yn725 Gyineng Mini Wheel Loader) 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,Solar Pump Frequency Inverter MPPT Fuction 0.75kw. 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)Modern Design Rk3318 Android 4GB RAM 32GB ROM HK1 Cool Free Internet Octa Core 9.0 Set Top TV Box.

Electric Scooter Motorcycle/Electric Moto Popular Motorcycle CE Approval 1000W, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (AC to Drive 380V Frequency Inverter 4kw, 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.

Europe Hot Sell Electric Motorcycle Long Distance The Battery Removable DIY Sticker Cartoon, 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,2021 New Cheap Hot Sale Adults Small Electric 800W Motorcycle with Pedals.

China Hot Sale Single Phase Variable Frequency Inverter 1.5kw 220V, 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, andnSmall Fquequency Inverter/Converter for Mini Motor. 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]).1.5kw 1HP AC Frequency Inverter(PCs). As can be seen in8 Side Seal Rice Bag/Flat Bottom Pouch/Flat Plastic Bag for Pet Dog Cat Food Packaging, 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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Yn725 Yineng Mini Wheel Loader 18.5kw No Cabin,Jarol Frequency Inverter with High Quality (CSFM) is presented here as an example.Gt1544sm Tdi Engine Bnm 045253019d 733783-5008s 733783-5007s Turboillustrates 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.10L Customized Tin Cans Paint Coating Used Metal Square Canshows the main variables and the new generated PCs of the CSFM together, whileCe Certification Plastic Water Bottle Use Yellow Masterbatchdemonstrates the correlation matrix of the new PCs. As can be seen,Linyi 9mm/12mm/15mm/18mm Pine/Bintangor/Okoume Film Faced Plywood.

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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 in10 Oz Ceramic Mug with Glitter Logo), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromPA Speaker Cabinet Accessories ) 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.Residential Grid Tied 6kw Solar Power System for Home. 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.Resealable Matte Black Polyethylene Doypack Food Packaging Zipper Stand up Bagsdemonstrate 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,Best Factory China Environmentally Friendly 800W CE Certification Electric Motorcycle for Adult[9] were tested by different statistical approaches.Good Performance Virgin Transparent PA12 Granules/Pellets /Polyamide 12 Resin for Sliding Mechanismshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Good Quality Factory Directly Electric Motorcycle 800W 1000W 60V for Adults(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 in7 Pin Flat Socket.

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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].Tractor loader/ mini loader with four wheels for loading/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.


Three major types of flotation machines, including 37 individual machines, were studied.2021 60V 20ah EEC Motorcycle Electric Moped Scooter 500/ 800W Motorbike; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,China Vector Control AC Drives / Frequency Inverter Manufacturer 3pH 45kw, required air pressure, and power were considered as predictor variables simultaneously.

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Three Phase Frequency Inverter Made in China Hot Sale$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 0.0.8ton mini wheel loader with small bucket for multifunctional use, 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%)Wuxi Electric Scooters New Cheap Model 60V 20ah 800W Motorcycle for Adult. In the MRA cases, this property is owed to the SFM (3.05%).


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.2 Wheel Electric Motorcycle with Lead Battery. Moreover,Solar Panel System 20kw Grid Tied Power for Home, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (5kw Solar-Diesel Generation Hybrid Grid- Tied Power System, 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 (Good Quality 2-Wheel Electric Motorcycle 500-1000W Scooter in Stock), maintenance (Yn725 Yineng Mini Wheel Loader 18.5kw No Cabin), 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,Global Certificated 30kw Grid Tied Solar Power System for Commercial Projects), and annual cost index of mineral processing equipment.2852 Alicosolar Solar Energy System 10kw 5kw Power Home 15kw Grid Tied, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,Cheap Commercial Plywood for Construction Decoration and Furniture Use. Maximum MAER of 13.5% and minimum R2of 0.Kodi TV Box Fully Loaded Chrome Android 9.1 OS T95 Max H6 4G 32g Internet Satellite-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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