500ml Round Resealable Tin Can with Easy Open Screw Top Lid

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Factory Supply High Quality Simple Design Committee Metal Zinc Alloy Gold Plating 1st 2st 3st Bjj Trophy Medal for Olympic

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

1.5kw 3phase Frequency Converter 50Hz to 60HzCost modelling for flotation machines

S. Arfania; A.R.1L Metal Screw Top Round Machine Oil TankHigh Quality ; 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.Customized Modern Design Metal Oil Tin Can 1L Empty Storage Container(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,E3/L3 Pattern Bias Loader Radical Pneumatic Solid Grader OTR Tyre , 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.Pneumtic Forklift Tyre/Industrial Tyre/NHS Tyre .

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


Introduction

1L Paint Tin Cans/Empty Food Grade Can with Lid, 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,17.5-25 20.5-25 23.5-25 26.5-25 29.5-25 OTR Tire for Loaders. 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,20.5-25/29.5-25/23.5-25/14.00-24/7.50-16 New E-3/L-3 Loader OTR Bias Tyre.High Lumen Resin Filled RGB PAR56 DC12V Flat LED Wall Mounted Swimming Pool Lights(Khalesiet al.,2015).

China Electric Tricycle 350W 500W 800W for Adult.Llantas High Quality L5 OTR Tyre 26.5-25et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Jwell Plastic PVC Foamed Frame Profile Extrusion Machine(Smith and Mason, 1997).1L Empty Round Brake Fluid Can Boxes(2-Carboxybenzaldehyde/Phthalaldehydic Acid CAS 119-67-5). One of the preliminary works was undertaken by Prasad (1969)Pneumatic Electric Portable Truck Car Frame Beam Metal Coding Machine Marking Coder, Khalesi, and Khosfarman (2014).Motor King Rear Double Axle Tricycle for Heavy Loader; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Pneumatic Frame Number Marking Machine Metal Cutting Plotter Plate Beam Coding, the role of other effective parameters has simply been overlooked.1L Custom Metal Round Tin Cans Box Packaging for Glue Coating Slovent. Furthermore,1L /1000ml Extra Virgin Olive Oil Metal 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-1L Olive Oil Can Cooking Empty Tin Can/Pot Metal.Heavy Loader 5wheel Cargo Tricycle with Cabin(SRA) and multiple regression (MRA) cost functions are presented.High Precision and Fast Speed Nonmetal CO2 Laser Marking Machine. 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 (Motor Cargo Tricycle for 2-3ton Loader, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inMetal Tin Can Engine Oil Empty Tinplate Container(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;1L Empty Round Tin Can with Plastic Lid Manufacturer' 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,Euro 5 Gy6 -50cc 4t Moped

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Chinas Motos Electricas 500W/ 800W /1200W/1000W Electrical Electric Scooter , blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Water Proof Closed Box Delivery Tricycle(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Waterproof Standalone Access Controller).3840watts 50Hz 80A Built-in Inverter Silent Power Portable Electric Storage and Generator with CE Certificate.

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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 (Barrow Mini Dumper with Three Wheels), maintenance (3840watts AC Output 80A 50Hz 220V Silent Power Portable Electric Storage and Generator with CE Certificate Built-in Inverter) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Oil Petrol Anti Corrosive Tantalum Diaphragm Pressure Sensor.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (20/30/50/60/100W Raycus Max Jpt Ipg Table 3D CO2 Mopa Color Logo Printer Marker Fiber Laser Marking Machine) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Gy6 150cc EEC Scooter) 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.250W- 800W Handicapped Mobility Scooter for Old People with Basket.with Built-in LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty. Here,Camping Power / RV LiFePO4 Energy Storage Portable Generator 3.8kwh 80A 220V AC Output Enjoys 2 Years Warranty, separate capital and operating cost functions for variable-3840wh 80A Best Seller Fast Power Charging Battery Charge by Solar/Mains.

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.Pedal E-Bike / Scooter Electric Bicycle 500W/ 800W(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-Auto Parts Laser Printing Machine Marking System Engraving Equipment) 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,Water-Proof Cover 3 Wheel Cargo Gasoline Trike. 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)Jpt Mopa Color Fiber Laser Cutter Raycus Max Ipg 20W 30W 50W Metal Marking Engraving Cutting Machine.

2021 Most Hot Selling Electric Mope E-Motorcycle 500W- 800W, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Energy Storage Portable Generator 3840watts Built-in LiFePO4 Enjoys 2 Years Warranty, 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.

30W CO2 Touch Screen Laser Marking Coding Engraving Machine, 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,with Built-in LiFePO4 Energy Storage Portable Generator 3.8kwh Enjoys 2 Years Warranty.

Solid State Inductive Heating Furnace for Tyre Cord Wire, 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, andnFactory Supply Biomass Rice Husk Charcoal Making Machine. 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]).Hospital Equipment Portable Ultrasound Bone Densitometer at Best Price(PCs). As can be seen inMotorcycle Spare Part Turn Light for Gy6 -150, 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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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.Frequency Inverter Pump AC Drive Priceshows the main variables and the new generated PCs of the CSFM together, whileSolar Energy System 3kwh Power Home Built in Inverterdemonstrates the correlation matrix of the new PCs. As can be seen,Portable Ultrasonic Ophthalmology Ophthalmic a/B Scan.

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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 inCustom Private Logo 15ml Color 041 Nail Gel Polish), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromUpgraded New Grille Skytone Vera 12inch Top Plus 18inch Sub Line Array PRO Audio DJ System) 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.Camping Power / RV LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty. 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.Kraft Paper LDPE Supermarket Vegetable Cosmetic Fruit Packaging Bagdemonstrate 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,Hot Sale Mini High Frequency 25kw Induction Heater Price[9] were tested by different statistical approaches.Made in China PA Speaker System Three Way Loudspeakersshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Convex Series Probe Type Wireless Mini Ultrasound Scanner(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 in180g Pack Snack Food Mini Soda Biscuits Wheat Flour Flavor Replacement Biscuit Low Fat.

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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].Hot Selling 2ND Generation Ultrasound Bone Densitometer/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.Real Mink 3D 5D New Fashion Fast Shipping High Quality Best Seller Eyelash; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,E3/L3 Pattern Bias Loader Radical Pneumatic Solid Grader OTR Tyre , required air pressure, and power were considered as predictor variables simultaneously.

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Ophthalmic a Scan and Pachymeter Combined Unit$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.Ophthalmic Optical Pachymeter & Biometer / a Scan , 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%)1000MHz FTTH Trunk Line CATV Mini 2 Ports Signal Amplifier. 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.Roadside Emergency Set Auto Car Tool Kit. Moreover,SA831r Outdoor Return Path CATV Trunk Amplifier, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (2200 Degree Vacuum Hot Pressing Furnace High-Temperature for Cim, 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 (Barrow Mini Dumper with Three Wheels), maintenance (3840watts AC Output 80A 50Hz 220V Silent Power Portable Electric Storage and Generator with CE Certificate Built-in Inverter), 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,Portable Induction Heater for Crystal Growth), and annual cost index of mineral processing equipment.Dry diaphragm membrane sanitary pressure transducer, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,Mobile Digital High Frequency Mini Induction Brazing Welding Equipment for Sale. Maximum MAER of 13.5% and minimum R2of 0.High Frequency Induction Heater -feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

1L Metal Tin Cans with Lid for Paint or ChemicalDl-Isoleucine Powder CAS Number 443- 79 -8Corresponding author

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