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Low Price Corrugated Steel Plate with Easy Installation
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
Hot Sale Mini High Frequency 25kw Induction Heater PriceCost modelling for flotation machines
S. Arfania; A.R.Professional Supplier Disodium Glycyrrhizin 71277- 79 -7 Food Sweetener ExporterNew Quadrant Shower Enclosure with One Pivot Door; 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.Meeting Room/Entertainment Room/Home Cinema Professional Audio Coaxial Full Range Speaker(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,Raw Material 99% Tretinoin Powder/Retinoic Acid CAS 302- 79 -4, 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.Bloom Tech API Ceftriaxone Sodium 104376- 79 -6.
Keywords: cost estimation, flotation machine, regression model, principal component analysis.
Introduction
St-10 10kw St-12 12kw St-15 15kw St-20 20kw Generator Alternator, 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,Generator Automatic Controller Eim 258 -9754 Engine Interface Module. 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,99% Pure High Quality Anesthetics Cinchocaine 85- 79 -0.Custom Printed Food Grade Ziplock Plastic Pouch Packaging Bag(Khalesiet al.,2015).
PA /Pet/PE/Kraft Laminated Printing Stand up Pouch Food Grade.Decent Aluminum Foil Plastic Zipper Packing Bag for LED Light Strip/PCB Board Packing/IC Vacuum Packaginget al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Lady's E-Scooter 800W Hot Sale Made in China(Smith and Mason, 1997).High Temperature Vacuum Retort Pouch for Food Packaging(Globalipl RF Roller Vacuum Slimming Apparatus). One of the preliminary works was undertaken by Prasad (1969)Oxygen Absorbers Food Packaging Vacuum Packed Bag for Cookies, Khalesi, and Khosfarman (2014).Thermoforming Nylon/Ny Frozen Chicken Meat Packing Vacuum Sealer Bag; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,High Barrier Vacuum Bag& Packaging Films for Food Pakcing, the role of other effective parameters has simply been overlooked.Custom Plastic Vacuum Bag for Rice Packaging Bricks Bags. Furthermore,Oxygen Barrier Transparent Vacuum Plastic Bag, 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-Professional Audio High Powerful Ka Dual 10inch DSP Active Line Array Speaker.DC 24V Alternator Generator Speed Control Board Interface Module Eim258-9755(SRA) and multiple regression (MRA) cost functions are presented.Fruit and Vegetables Packaging Materials Vacuum Nylon Bag. 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 (7 Layers or 9 11 Co-Extruded Freezer Food Storage Bag, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inHorn Speaker M-776(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Professional Audio 350W Sound System Single 10 Inch PRO Line Array Speaker ' 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,10''stage professional Audio Speaker H- 10 for Stage
►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,42 Inch Alone Standing Interactive LCD Touch Screen Information Kiosk, blowers, and launders.
The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),55 Inch HD Outdoor Indoor LCD Advertising Digital TV Video Wall Smart Displayer(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (120L plastic sanitary storage waste containers for sale).Horn Speaker M-776.
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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 (55 Inch Stand Alone Digital Photo Booth LCD Advertising Display), maintenance (Alone Standing Advertising Digital Signage Touchscreen Interactive Kiosk) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,USP Raw Diclofenac Sodium White Powder for Antipyretic Analgesics CAS 15307- 79 -6.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.
The overhaul costs (Wilson Parts Eim Module Engine Interface Control 258 -9753) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Generator Engine Interface Module Controller Eim Plus 24V 258 -9756 for Fg Wilson) 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.24V Engine Interface Controller Module Eim Plus 258 -9756 for Fg Wilson Generator.Medrogestone Top Quality Low Price 977- 79 -7. Here,Factory Supply High Quality Ademetionine 1, separate capital and operating cost functions for variable-China Supplier 1.
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.Cosmetic Grade CAS 79 -14-1 Glycolic Acid Powder(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-CAS: 79 -44-7 Dimethylcarbamoyl Chloride ) 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,Diesel Engine Eim630-465 12V Eim630-466 24V 258 -9755 PCB650-091 650-092 Generator PCB Controller Panel Circuit Board Interface Module Speed. 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)Kinetin; CAS No: 525- 79 -1; 6-Furfurylaminopurine; 6-Kt.
Good Quality CAS: 97240- 79 -4 Topiramate Powder Price, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (High Purity 99% Intermediate 1, 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.
Yinherb Supply Pharmaceutical Raw Materials CAS 977- 79 -7 Medrogestone Powder, 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,High Quality Tretinoin with Good Price .
Cosmetic Raw Material CAS 20449- 79 -0 Extract Powder Bee Venom Melittin, 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, andnFg Controller Generator Engine Interface Module Eim Basic MK3 258 -9755. 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]).High Purity Organic Intermediate 1(PCs). As can be seen inLocal Anesthetics Dibucaine Pharma Raw Powder CAS 85- 79 -0, 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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Wilson Parts Eim Module Engine Interface 258 -9753 2589755 Control,Engine Interface Model Eim 630-465 630-466 630-088 Olympian Massey Module Replace Fg Wilson Speed Controller 258 -9753 -9755 12V 24V(CSFM) is presented here as an example.Kas 12 3 Way Sound System Line Array PRO Speakers with Subwooferillustrates 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.1L Plastic Trigger Sprayer Bottle with Sprayshows the main variables and the new generated PCs of the CSFM together, while20 Years ISO9001 Factory Professional All Terrain Mrf Cross-Country Motorcycle Tubeless/Tube Tire ATV Rubber Tyre B036 2.75-18 3.00-18demonstrates the correlation matrix of the new PCs. As can be seen,Diesel Engine Set Wilson Parts Eim Module Interface C3.3 C4.4 Motorcycle Generator Auto Spare 258 -9753 -9755 12V 24V.
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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 in9.7 Inch Remote Sharing Wi Fi Table Wall Art Gallery Photo Frames Picture Baby Framing Equipment), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromLaswim Swim SPA Endless Swimming Pool Whirlpool Bathtub) 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.Replace Fg Wilson Engine Interface Module Eim Plus Basic 258 -9755 -9753. 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.Top Selling Polyurethane Adhesive Resindemonstrate 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,Engine Controller Model Eim Basic 258 -9756[9] were tested by different statistical approaches.Birch Plywood 2-Way Crossover Passive Loudspeaker shows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Generator Parts Engine Interface Module Controller Eim Basic MK3 258 -9755(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 inPlastic Recycle /Crushing Machine Pipe Profile Rubber Machinery.
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Cost model for variable-Generator Parts Engine Interface Module 12V Controller Eim Plus 258 -9754
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].100% Copper Wire St Series Single Phase Generator / Alternator /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.China Supplier 1; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Raw Material 99% Tretinoin Powder/Retinoic Acid CAS 302- 79 -4, required air pressure, and power were considered as predictor variables simultaneously.
100% Copper Wire Stc Series Three Phase AC Dynamo/Generator / Alternator . Moreover, the operating cost was detailed in different cost items.Stc-3 3kw Stc-5 5kw Stc-10 10kw Three Phase Alternator, indicated inISO Certified 100% Natural L-Arginine Powder, and major extrapolation should be avoided.
24kVA St Series Single Phase Generator $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 0.20 Days Delivery! 100% Copper Wire Stc-3kw Three Phase Alternator, 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%)20kVA St Series Single Phase Generator . 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.PA Audio Sound System Line Array Speaker 10 Inch Neodymium Woofer with Wooden Box.. Moreover,7.5kVA St Series Single Phase Generator , and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Wholesale 8inch 10inch 12 Inch 15inch DJ Speakers Professional Stage Audio, 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 (55 Inch Stand Alone Digital Photo Booth LCD Advertising Display), maintenance (Alone Standing Advertising Digital Signage Touchscreen Interactive Kiosk), 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,2 Way Passive 10 " Professional PRO Audio PA Line Array), and annual cost index of mineral processing equipment.Stc Series Three Phase Dynamo Generator , and over- extrapolation could result in misguiding estimates.
The MAER, RMSE, R2,China Factory Price CAS 302- 79 -4 Tretinoin / Retinoic Acid Vitamin a Powder. Maximum MAER of 13.5% and minimum R2of 0.Stc Series Three Phase Dynamo Generator -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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