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Good Quality Powder CAS 56377- 79 -8 Nosiheptide with Best PriceCost modelling for flotation machines

S. Arfania; A.R.1L Beer CanYn725g Yineng Mini Wheel Loader; 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.High Quality Electric Scooter Factory(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,Cute Electric Scooter Motorcycle with Pedals 60V800W14ah Lithium Battery for Adults, 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 0.1L Panit Can.

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

Introduction

1L and 5L Can for Antifreezing Liquid, 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 Fashionable High Quality with Lithium Battery Electric Scooters EEC Vespa Citycoco Newest Model Motorcycle. 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,Pump Inverter Variable Frequency Drive Manufacturers AC Supplier.Cheap Smart Electric Scooter for Lady 60V800W20ah with Customer Foot Pedal(Khalesiet al.,2015).

Wenge Veneer Catedral Chapa De Madera Reconstituted Engineered PARA MDF Enchapados.China Ebike Velo Electr 500 Watt Electric Motorbikes for Adults in Stocket al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Flying Laser Marking System Marker(Smith and Mason, 1997).Frequency Inverter Solar Pump Vector Air Compressor Power Transformer(Plastic PVC/CPVC Electricity Conduit Tube/ Water Sewage Pressure Pipe/Gas Hose/ Profile/Sheet Extrusion &Extruding Production Line Price). One of the preliminary works was undertaken by Prasad (1969)Supply China Control Frequency Converter VFD Power Transformer Motor Drive, Khalesi, and Khosfarman (2014).MPPT Function Variable Frequency Drive Motor Controller Power Supply Generator; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,0.75kw-11kw Three Phase 380V Frequency Inverter VFD, the role of other effective parameters has simply been overlooked.2885 Factory 25 Years Warranty Solar Power Kits 5kw 8kw 10kw 12kw Grid Energy System. Furthermore,2876 10kw Home Used Solar Power System on Grid Roof, 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-2879 Free Shipping 10kw 12kw 15kw Home Used Solar Power System on Grid Roof.AAA Grade 0.9mm Poplar Core/Veneer for Plywood/Furniture(SRA) and multiple regression (MRA) cost functions are presented.Radiate Pine Face Veneer. 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 (Grade AA Veneer Furniture Building Material Plywood to Dubai, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inDiesel Central Drive Three Wheel Dumper for Sale(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;1L Wholesale Round Tin Can for Paint/Engine Oil with Tight Lid' names:

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The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Set Top Box T95q S905X2 4G 32g Android 9.0 HD TV Kodi Quad Core(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Women Jewelry AAA Cubic Zirconia Bracelet Wholesale).Hot Popular Fast Shipping H. 265 Standars Czech Republic Channels Internet TV Box.

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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 (Junuo China Factory Mini Plastic E Digital Internet TV Set Top Box DVB T2 for Russia), maintenance (5 Litre Extra Olive Oil Tin Can ) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,DC/AC Frequency Inverter Solar Pump Power 400-600V Input 2.2kw.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Frequency Converterlow Industrial Power Inverter) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (2370 Alicosolar Easily Install 10kw on Grid Solar System 10kVA Kit with CE/TUV/ISO for Home Use) 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.China Electric Moped Motorcycle Sale for Adults Mobility E Scooter with Battery.Three Phase 380V/ 0.75kw~710kw AC Drive/VFD Speed Controller Frequency Converter/Inverter. Here,DC/AC Frequency Inverter Solar Pump Power 400-600V Input 4kw, separate capital and operating cost functions for variable-Low Price B/C/D/E Grade Wood/Natural Birch Veneer.

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.Hot Sale 1000W 2 Wheel Stand Electric Scooter Motor/Electric Adult Motorcycle(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-Solar Pump Inverter Price Quality AC Drive Frequency Converter) 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,Good Quality Pine Wood Core Block Board with Okume Film. 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)Hot Good Bulk Quality 60V800W20ah Electric Motor Scooter for Ladies.

Al-Gw6 Fast Electric Motorcycle Speed 60km/H Kits, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Titan Chargeuses Cheap Small Log China Mini Digger Loader with European Quick Hitch, 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.

Chinese Factory Direct Supply Lithium Battery Electric Scooter LCD Display Motorcycle E-Scooter, 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,Cheap Chinese Moped Scooter with Lithium Battery Rechargeable Electric Motos Motorcycle.

2021 Wuxi Best Selling New Type Racing Mobility Adults 2 Wheels Electric Motorcycles E Motos CKD Scooters, 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, andnGrid Tied Solar Energy System 5kw 10kw 20kw 50kw 100kw 200kw 300kw 500kw. 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]).2021 Hot Selling Two Wheel Cheap Powerful Electric Moped Motorcycles with Pedals Chinese Supply CKD Scooter(PCs). As can be seen in3 Phase 50 - 60Hz Intelligent Power Saver, 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.Best Quality BMK Glycidate Raw Materials Fororganic Intermediates Bulk Priceshows the main variables and the new generated PCs of the CSFM together, while800W 72V China Electric Tricycle for Handicappeddemonstrates the correlation matrix of the new PCs. As can be seen,Wolf Shovel Loader E5 for Agriculture Work.

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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 inZh-650ba-Automatically Paper Pre-Fold Folding Gluing Machine for Cardboard), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromDeltamethrin 98% Tc Insecticide 2.5 Sc Wholesale 2021) 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.Wolf Wl80 Mini Dumper Loader with Bucket. 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.Factory Nitrogen Fertilizer Ammonium Sulphate 20.5%N Steel Grade for Agriculturedemonstrate 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,Everun Er408 800kg Construction Equipment Compact Mini Wheel Loader with Bucket[9] were tested by different statistical approaches.Dual 10 " Outdoor Wooden PA System Bluetooth Trolley Smart Speakershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Agricultural Machine Small Wheel Loader Mini780 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 inShiny Patent Durable Synthetic Faux PU Leather for Shoes and Bags.

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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].Zl08f 0.8ton China Cheap Price Articulated Tractor Front Wheel Loader/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.Factory Price Zl08 Mini Articulated Hydraulic Front End Farm Wheel Loader; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Cute Electric Scooter Motorcycle with Pedals 60V800W14ah Lithium Battery for Adults, required air pressure, and power were considered as predictor variables simultaneously.

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All Sizes Good White Recon Veneer$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.Dyed Natural Wood Veneer Oak Crown Cut for Hotel Decoration Shop Wall Kitchen Cabinet, 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%)15mm Pine Wood Core Block Board for Construction. 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.The New Natural Mahogany Okoume Veneer. Moreover,Veneer Paper Tape Reeling and Gummed Repair for Joining Repairing Core Face Door Furniture, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (982 High Efficiency up to 99% on Grid Solar System 50kw Plants for Large Scale Commercial, 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 (Junuo China Factory Mini Plastic E Digital Internet TV Set Top Box DVB T2 for Russia), maintenance (5 Litre Extra Olive Oil Tin Can ), 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,2021 Hot Selling Popular New Cool Type Cheaper Price Chinese Supplier 2 Wheels Electric Scooters E Motos Motorcycles), and annual cost index of mineral processing equipment.Windows Mini PC Pipo X10 PRO Z8350 Chipset Smart TV Box Android 5.1 4G RAM 64G ROM, and over- extrapolation could result in misguiding estimates.

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Lashgari, A.Innopack Food Grade Metal Tin Can for Edible Cooking Oil in Low Price, A.R. 2013.Cheapest Price Mxq PRO Rk3229 4K Android TV Box 1GB 8GB Smart Set Top Download User Manual Firmware Update Wholesale Model,Table PC Pipo X9s TV Box Win10 Mini Z8350 Chipset Digital Receiver Smart,vol. 23. pp. 441-446.         [China Price Wholesale Double Wall Vacuum Insulated Travel Rambler Stainless Steel 30oz Coffee Tumbler]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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