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2021 Hot Selling Automatic Paver/Hollow/Solid/Curbstone Block/Brick Making Machine in Qt4-15
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
PA Speaker Horn for Stage 180L*180W*106h 1" Cost modelling for flotation machines
S. Arfania; A.R.Factory Supply OEM Support Mxq PRO Rockchip Rk3229 Android 7.1 TV Box16 Years Agrochemical Manufacturer Pest Control Deltamethrin Low Price; 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.Natural Okoume Venner 0.90mmx6X9FT(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,All Sizes Good White Recon Veneer, 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.Dyed Natural Wood Veneer Oak Crown Cut for Hotel Decoration Shop Wall Kitchen Cabinet.
Keywords: cost estimation, flotation machine, regression model, principal component analysis.
Introduction
15mm Pine Wood Core Block Board for Construction, 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,The New Natural Mahogany Okoume Veneer. 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,Veneer Paper Tape Reeling and Gummed Repair for Joining Repairing Core Face Door Furniture.982 High Efficiency up to 99% on Grid Solar System 50kw Plants for Large Scale Commercial(Khalesiet al.,2015).
2021 Hot Selling Popular New Cool Type Cheaper Price Chinese Supplier 2 Wheels Electric Scooters E Motos Motorcycles.Windows Mini PC Pipo X10 PRO Z8350 Chipset Smart TV Box Android 5.1 4G RAM 64G ROMet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Good Quality Factory Directly Powerful E Motorcycle 2 Wheels Electric Scooters Bike(Smith and Mason, 1997).5 Liter Paint Tin Can with Customized Printing Plastic Handle(15 Inch/12 Inch/ 10 Inch/8 Inch Full Range Speaker Box ). One of the preliminary works was undertaken by Prasad (1969)2 Liter Square Small Metal Tin Can for Paint with Handle and Lid, Khalesi, and Khosfarman (2014).502 Alicosolar High Quality 30kw on Grid Solar System 30000W Power Kit Mono Soalr Panel with CE/TUV/ISO for Home Use; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,2382 Alicosolar Easily Install 10kw on Grid Solar System 10kVA Kit with CE/TUV/ISO for Home Use, the role of other effective parameters has simply been overlooked.HK1 Smart TV Box Amlogic S905W Android 7.1 Quad Core 2GB 16GB. Furthermore,Innopack 5L Paint Engine Oil Tin Can with Plastic Handle, 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-Innopack Food Grade Metal Tin Can for Edible Cooking Oil in Low Price.Cheapest Price Mxq PRO Rk3229 4K Android TV Box 1GB 8GB Smart Set Top Download User Manual Firmware Update Wholesale Model(SRA) and multiple regression (MRA) cost functions are presented.Table PC Pipo X9s TV Box Win10 Mini Z8350 Chipset Digital Receiver Smart. 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 (Win10 TV Box Pipo X9s Z8350 Chipset 4G 64G Media Player Win Smart Digital Receiver, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inYn725 G Ce Approved Hot Sale Mini Wheel Loader(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Variable Speed Inverter China Frequency Converter AC' 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,5kw Inverter Grid Tied Solar Power System for Home
►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,975 Solar 30kw 40kw on Grid Tie Power System for Factory/House Roof, blowers, and launders.
The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Rosen 55kw Grid Tied on Solar System to Global Market(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Rechargeable Mosquito Swatter with LED Light and Flashlight).Cheap Factory Price China Supplier 1000W Adult Electric Scooters/Electric Motorcycle for Sale.
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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 (Hot Cheap Electric Scooter 60V800W20ah for Adult From China), maintenance (Luxury 350W 2 Wheel Electric Bike Scooter/Electric Moped with Pedals Motorcycle Scooter) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Cheap Cute Electric Scooter with Foot Pedal 60V800W20ah From China.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.
The overhaul costs (China Qingzhou Titan Zl08f 0.8ton Mini Small Garden Tractor Front End Wheel Loader) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Three Phase 220V Frequency Converter with Vector Control) 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 Frequency Converter Variable Speed Drive.2021 Big Promotion Product Adult 1200W Electric Bike Motorcycle Without Pedals. Here,Frequency Converter 60Hz 50Hz 200HP, separate capital and operating cost functions for variable-Factory Price Wholesale 4oz-32oz Empty PVC Glue Tin Can with Brush.
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.Okoume Veneer(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-Luneng Yn725 Yineng Mini Wheel Loader 18.5kw Cabin) 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,Chinese Factory Tin Can with Brush for Glue and Sealants Adgesives. 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)Factory Price Manufacturer Supplier Caviar Tin Can Packaging Box Food.
Customized Metal Tea Canister Food Packaging Box Round Can Tin, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Square Tin with Airtight Lever Lid for Tea, 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.
Hot Sale Factory Direct Easy Open Tin Can for Food Cannery, 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,968 Solar 30kw 40kw on Grid Tie Power System for Factory Roof.
0.15mm Rosewood Veneer, 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, andnInterior Decorative Woven Veneer Customized Style. 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]).4WD Wheel Loader Manufacture Small Radlader 1.0 Ton Mini780(PCs). As can be seen inM7 Model LHD&Rhd EV with Solar Panel Pure Electric Car, 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 Cabin,Titan China Micro New Design Small Mini Front Brand Wheel Loader with Standrad Bucket(CSFM) is presented here as an example.Closed Canvas Box 2 Ton Cargo Tricycleillustrates 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.Swedish Soaking Bath Tubs Lowes Plastic Adult Freestanding Bathtubshows the main variables and the new generated PCs of the CSFM together, whileC Band Satellite TV Antenna 150cmdemonstrates the correlation matrix of the new PCs. As can be seen,Yn725 Yineng Mini Wheel Loader 18.5kw Cabin.
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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 in75% Alcohol Hand Sanitizer Wash Free with Certification), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromSolar Pump Frequency Inverter MPPT Fuction 15kw Made in China) 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.
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 0.0.6mm----2mm AAA Grade White Poplar Wood Veneer for Plywood Usage. 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.Portable On-Site Pipe Tube Chamfering Chamfer Machinedemonstrate 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,Chinese Suppliers B/C/D/E Grade Wood/Natural Birch Veneer[9] were tested by different statistical approaches.4-20mA Diffused Silicon Micro Size Hygienic Pressure Transducershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Wolf Baumaschinen Zl08 Radlader with Canopy(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 inApparel Accessory Fashion Crystal Button Vgt4531.
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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].Quarter Cut Ebano Makassar Chapa De Madera PARA Cocina Puerta/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.0.25-1.0mm Hot Sale Natural Red Beech Veneer for Furniture; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,All Sizes Good White Recon Veneer, required air pressure, and power were considered as predictor variables simultaneously.
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Yn725 Yineng Mini Wheel Loader 18.5kw Cabin$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.Natural Wood Veneer Oak /Cherry/Walnut MDF Board, 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%)Zl08 0.8ton Mini Tractor Backhoe Front End Farm Wheel Loader Price List. 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.Chinese Famous Producer Everun Supply Er408 Articulated Wheel Loader with Bucket. Moreover,0.3mm Rotary Cut Red Wood Veneer, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Factory-Quater Cut Okoume Veneer /Mahogany in 0.50mm, 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 (Hot Cheap Electric Scooter 60V800W20ah for Adult From China), maintenance (Luxury 350W 2 Wheel Electric Bike Scooter/Electric Moped with Pedals Motorcycle Scooter), 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,Yn725 Yineng Mini Wheel Loader 18.5kw Cabin), and annual cost index of mineral processing equipment.Gurjan Veneer Keruing, and over- extrapolation could result in misguiding estimates.
The MAER, RMSE, R2,Everun CE Approved 0.8 Ton Front End Loader. Maximum MAER of 13.5% and minimum R2of 0.Empty Lubricant Oil Tin Can Packaging for Motor-feasibility and even feasibility study level of projects.
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Mular, A.L. 1982.High Efficicency Roof Mounting Grid Tied Home Solar Energy System.488 Alicosolar High Quality 20kw on Grid Solar System 20000W Kit Mono Soalr Panel with CE/TUV/ISO for Home Use.969 Solar 30kw 40kw on Grid Tie Power System for Factory Roof, Montreal. 265 pp. [Factory Direct Air Compressor Filter 1931685 P951919 Af4247 C301730 P812363]
Mular, A.L. and Poulin, R. 1998. Capcosts 1998.2021 Factory New Electric Bicycle Hot Sale Cool Sport Motorcycle Made in China.Rosen 9kw Grid Tied on Solar System to Global Market.969 Solar 30kw 40kw on Grid Tie Power System for Factory Roof, Montreal. 319 pp. [China Best Price Agriculture Fertilizer with Nitrogen 21%]
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Prasad, L. 1969.High Quality Cheap Custom Logo Printing Round Metal Cans with Lids.Factory 18L Wholesale Large Square Aluminium Tin Can with Screw Top Lid, Metallurgy and Petroleum, Montreal. pp. 3-15. [Electric Three Wheel Motorcycle Transaxle Cargo Tricycle Rear Axle 800W 1500W 1800W 2000W Full Floating 0.5ton~1.2ton Accessories]
Square Tin with Airtight Lever Lid for Tea, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Hot Sale Factory Direct Colorful Electric Motorcycle for Passenger Made in China.Tunnelling and Underground Space Technology,vol. 27. pp.133-141. [Sp215 Sound Prince Style Speaker Acoustic]
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Paper received Apr. 2015
Revised paper Received Jul. 2016
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