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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.Factory Price Fully Automatic Dustbin Injection Molding Machine(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,Jwell TPU Matt Cast Film Machine, 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.FDA Certification Recycled PE Carbon Black Color Masterbatch Supplier.

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

Introduction

Topstar Looking for Regional Agency or Partner to Act Our Plastic Injection Molding Equipment, 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,Plastic Raw Materials Black Color Masterbatches China Supplier. 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,35% Blowing Film Grade Carbon Black Masterbatch Manufacture.Uns S31703/AISI 317L Stainless Steel Sheet/Plate/Coil/Pipe/Flange/Fittings/Bolt & Nuts(Khalesiet al.,2015).

2021 New Design Plastic Injection Molding Machine Made in China.Carbon Black Masterbatch for Injection Mouldinget al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for High bright Samsung 46" 49" 55" LCD video wall screen monitor(Smith and Mason, 1997).PLA Masterbatch Manufacturers for 3D Printing Filament(4.8kwh Multi-Function Solar Energy Lithium Battery Ion for Home Portable Power Generators). One of the preliminary works was undertaken by Prasad (1969)PLA Color Masterbatch for 3D Printing, Khalesi, and Khosfarman (2014).30% to 50% Carbon Content PP Application Making Plastics Product Film; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,V5.0 Fashion Mini Twins Wireless Bluetooth Earphone with Microphone, the role of other effective parameters has simply been overlooked.Portable in-Ear Invisible Headphones with Charging Case. Furthermore,Jwell Raincoat TPU Film Extrusion Machine, 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-Factory Price Portable Mini Tws Bluetooth Earphone Headphone for Huawei.Hot Selling Headset Bluetooth Wireless Headphone with Charger Case(SRA) and multiple regression (MRA) cost functions are presented.Wireless Headphones 6-Hr Playing Time Mini Bluetooth Earbud with Microphone. 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 (Super Design Mini Earpieces Headset Wireless Earphones for Huawei, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in2385 Alicosolar Easily Install 10kw on Grid Solar System 10kVA Kit with CE/TUV/ISO for Home Use(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;PVC Marble Coated Decorative Sheet Production Line Extruder' 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,Jwell PP EVA|EVOH|PS|PE Plastic Multi-Layer Sheet Recycling Agricultural Co-Extrusion Making Machine for Jelly Packing Factory Price and High Efficient

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The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),PVC Plastic Marble Board/Plate/Wall Extruder(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Puruite 3040 1500W CNC Woodworking Engraver Router Machine for DIY Hobby at Home).Food Additive Granular Dihydrate Disodium Phosphate.

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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 (Factory Supply Disodium Phosphate Food Grade), maintenance (E320L/B/C/D Boom Cyl Seal Kit Excavator Oil Kits) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Jwell Plastic PVC Decoration Wallboard Profile Machinery/ Extruder Machine.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Disodium Phosphate Food Grade Manufacturer) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (99% Tech Grade Disodium Phosphaten Used as Water-Softening Agent) 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.Sodium Phosphate Monobasic Msp Industrial Grade CAS 7758-80-7.Ammonium Polyphosphate APP-II CAS No. 68333- 79 -9. Here,High Quality Disodium Phosphate Sell by Factory, separate capital and operating cost functions for variable-Factory Supply Disodium Phosphate Anhydrous Food Additive.

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.Head Gasket (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-Disodium Hydrogen Phosphate ) 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 . 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)K20 K30 Tungsten Carbide Thread Rod with Double Helix Hole or Straight.

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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.

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whereX_obsis the observed value,x_ethe estimated value at time/placeI,and n,Seal Kits Komatsu PC200-5/6 Boom Cyl Kit.

Industrial Grade SHMP , 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, andnSpiral Reversible Replacement Solid Tungsten Carbide Round or Square Indexable Woodturning Cutters Inserts for Wood Turning. 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]).E320L/B/C/D Boom Arm Bucket Cyl Seal Kit Excavator Oil Kits(PCs). As can be seen inWolf Loader Wl80 Radlader Without Cabin, 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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K10 K20 P30 Tungsten Carbide Plate Strips for Cutting,Komastu PC60-6 Arm Cyl Oil Seal Kit(CSFM) is presented here as an example.Plastic Mylar Customize Container Food Grade Zip Stand-up Pouch Packaging Bag with Clear Windowillustrates 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.Plastic Pipe Production Extrusion Lineshows the main variables and the new generated PCs of the CSFM together, while55 Inch Stand Alone Digital Free Standing LCD Advertising Displaydemonstrates the correlation matrix of the new PCs. As can be seen,Cat320b/C/D Arm Cyl Seal Kit Excavator Oil Kits.

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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 inBintangor/Okoume/Pencil Cedar Commercial Plywood with Good Price for Furniture), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromAC Board China Vector Control 60Hz to 50Hz VFD Drive Price) 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.Solvent Violet 59 . 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.150cc off Road Utility ATV with Reverse demonstrate 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,Solvent Violet 13 for Plastic Application[9] were tested by different statistical approaches.Dual 10 " Two Way PA Power Line Array Speakershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Solvent Violet 11(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 inTungsten Carbide Cold Forming Dies for Precision Mould.

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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].Manufacturer ASTM 316L Uns S32205 Duplex Stainless Steel Tubes/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.Solvent Violet 10b 9; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Jwell TPU Matt Cast Film Machine, required air pressure, and power were considered as predictor variables simultaneously.

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Uns S32750 2507 S32760 F55 1.4501 Super Duplex Stainless Steel Bar$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.Skycron® Disperse Violet 26/HFRL Dyestuff Fabric Dye, 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%)ASTM A790 Uns S31803 Seamless Stainless Steel Tube. 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.Manufacture High Quality PLA Silk Color Masterbatch. Moreover,Ce Certification Plastic PP Blue Color Masterbatch, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (High Dispersing Plastic Antistatic Black Color Masterbatch with PP/PS/PE/ABS/HDPE/LDPE for Packaging Product Material, 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 (Factory Supply Disodium Phosphate Food Grade), maintenance (E320L/B/C/D Boom Cyl Seal Kit Excavator Oil Kits), 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,Wireless Earbuds Headphones with Bluetooth 5.0 Earphones True Stereo Tws Charging Case for Sports Drive or Work), and annual cost index of mineral processing equipment.Bluetooth 5.0 Headset Mini Tws True Wireless Earbuds Stereo Bass in-Ear Earphone, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Mini Wireless Stereo Tws 5.0 Music Earphone L18. Maximum MAER of 13.5% and minimum R²of 0.Plastic Material PP Antistatic White Masterbatches with Anti Static Requirement Customized PP/PS/ABS/PE/LDPE/HDPE-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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