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Ring Crush and Edge Testing Machine

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

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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.Water Bottles Wrapping Machines Semi Automatic Film Shrink 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,Gy6 -80 Motorcycle Parts Starting Motor Gear, 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.Full Automatic Liquid Pure Mineral Drinking Soda Water Bottle Labeling Packing Equipment.

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


Introduction

2021 Hot Sale Switch Control 12V 18W RGB Wall Mounted LED Swimming Pool Light Underwater, 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,Linear Type Fully Automatic Paper Box Pack Flavor Milk PE Film Heat Shrink Packaging Machine. 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,Fully Automatic Shrink Wrapping Packing Machine.No Flicker Glare Cost-Effective Products12V 18W LED Swimming Pool Light with Two Years Warranty(Khalesiet al.,2015).

Newest 250cc Farm UTV 200cc Go Kart Buggy with Ce.No Flicker Glare Pool LED Light Wnderwater Waterproof RGB Wall Mounted Swimming Lamp with Edison Chipet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Dirt Bike for 199 Cc Displacement(Smith and Mason, 1997).Motorcycle Stator Coil/Magneto/Bobina Del Estator/Moto Partes/Repuestos Gy6 8coils(Flat film Clamp Hygienic Pressure Sensor Transmitter). One of the preliminary works was undertaken by Prasad (1969)No Flicker Glare Pool LED Light Wnderwater Waterproof RGB Wall Mounted Swimming Lamp with Two Years Warranty, Khalesi, and Khosfarman (2014).Gy6 /Jog Motorcycle Regulator/Rectifier Parts; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Yog Spare Parts Accessories Motorcycle Stator Comp Gy6 125, the role of other effective parameters has simply been overlooked.Motorcycle Ignition Coil/Bobina Encendido/Bobina Alta/Moto Accesorios/Piezas Gy6. Furthermore,Gy6 /Jog Motorcycle Spare Parts Regulator/Rectifier, 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-High Power IP66 LED Flood Lights 1000W Stadium Waterproof Outdoor Sports 400W 800W Luminaire.20MHz Medical Crf Machine Deep Wrinkle Removal Beauty Instrument(SRA) and multiple regression (MRA) cost functions are presented.Motorcycle Spare Part Turn Light for Gy6 -150. 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 (Fractional RF & Thermal Machine , 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inDiesel Engine Parts Fuel Injection Nozzle 148pn306(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Motorcycle Ignition Coil Bobina Alta Tvs Star Gy6 -125 Cg125' names:

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Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Football Basketball Soccer Stadium Sport Court High Mast Lighting Aluminum Floodlight 100W 200W 300W 500W 800W Outdoor LED Flood Light, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),ADSS Body Slimming Beauty Machine (CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (60000 BTU Split Air Conditioning).Portable Themagic Fractional RF Machine for Skin Tightening.

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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 (China Wholesale 110/90-16 High Quality Motorcycle Tyre/Tire), maintenance (Peonylighting 800W High Pole Stadium LED Flood Yard Lamp) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,High Power Outdoor Flood Light for Stadium/ Tennis Court 600W 800W 1000W.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Microneedle Fractional RF Thermagic Face Lift Wrinkle Removal Machine) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (RF Microneedle Thermal Facial Lift Beauty Equipment) 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.Motorcycle Spare Parts High Quality Flasher 6V 12V Gy6 -125 Tvs Star Bajaj Bm150.Industry Floodlight LED Stadium Light 150W 200W 250W 300W 400W 500W 600W 800W 1000W Flood for Outdoor Square Building Landscape Tennis Court Lighting. Here,High Feedback Tied Malaysian Virgin Hair, separate capital and operating cost functions for variable-Portable Lithium Ion Battery Solar Energy System 3kwh All in One Power for Use Home and Outdoor.

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.Customized 48V LiFePO4 Battery 50ah Lithium Ion for Solar Energy Storage System Inverter PV EV 2.5kwh 3kwh 5kwh(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-150cc 300cc 500cc 650cc 2 Seat Adult Frames Go Kart) 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,200cc Racing Go Kart for Sale Cheap. 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)China 300cc Adult Road Legal 2 Seat Pedal Go Kart.

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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.

Peanut Shell and Rice Husk Continuous Carbonization Oven, 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,Factory Direct Wholesale 300- 17 Motorcycle Tire/Tyre.

ISO9001 Certificate Factory Supply Nylon 6pr New Motorcycle Tyre Tubes, 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, andnHandheld Small Portable Digital High Frequency Induction Brazing Machine with Soft Cable. 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]).Mobile Digital High Frequency Mini Induction Brazing Welder for Aluminum Tube Pipe(PCs). As can be seen inTriple Phase 380V 50Hz 60Hz 7kw AC Variable Frequency Converter, 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.Good-Tightness Square Tin Can Metal Engine Oil with Sscrew Lidshows the main variables and the new generated PCs of the CSFM together, whileTop Quality Insecticide Classification Deltamethrin 98%TCdemonstrates the correlation matrix of the new PCs. As can be seen,Yog Motorcycle Spare Parts Magnetic Switch Assy Starter Relay for Cg125 Bros Nxr Honda Suzuki Akt 125 Akt110 Bws100 Gy6 Italika Kintaro YAMAHA Haojue.

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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 inHoliday Light Colored G40 String), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found from0.8t 800kg Small Loader) 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.Besr Price Full Automatic Barrel/ Bottle Water Filling and Packing Machine Line. 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.Direct Injection Water Cooled Diesel Engine Used for Generator Setdemonstrate 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,Medical Machine / Multipolar RF Facial Beauty[9] were tested by different statistical approaches.AC Driveshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Made in China High Performance Tubeless Fat Motorcycle Tire 180/55- 17(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 Wire Drawing Dies for Metal.

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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].ISO9001 Certified Factory Price China Motorcycle Tires 2.75- 17/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.25kw High Frequency Induction Heater for Bolts&Rivet; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Gy6 -80 Motorcycle Parts Starting Motor Gear, required air pressure, and power were considered as predictor variables simultaneously.

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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.DOT Certified off Road Chinese Motorcycle Tire 3.00- 17. Moreover,Linear Type Thermal Film Packing Machine / Equipment, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Good Solutions 3kw Solar Home Energy off Grid System, 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 (China Wholesale 110/90-16 High Quality Motorcycle Tyre/Tire), maintenance (Peonylighting 800W High Pole Stadium LED Flood Yard Lamp), 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,Jalyn Motorcycle Spare Parts Speedometer Assy Fits for Gy6 /Hunter), and annual cost index of mineral processing equipment.25kw High Frequency Induction Heat Soldering Machine, and over- extrapolation could result in misguiding estimates.

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Mular, A.L. 1982.Waterproof IP66 Adjustable High Power LED Stadium Lamp 100W 200W 300W 400W 600W 800W 1000W 1200W 1500W Flood Light.High Quality 1L 32oz Amber Glass Bottle in Stock.Fast Delivery Plastic Empty Spray Bottle Lotion Pump for Hand Sanitizer 30ml- 1L, Montreal. 265 pp.         [Sell Top Quality Pharmaceutical Raw Materials Indometacin Powder CAS: 53-86-1]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.1L Stainless Steel 304 Bottle with Clamp and Silicone Gasket.Automatic Pure/Mineral Bottle Water Packing Machine .Fast Delivery Plastic Empty Spray Bottle Lotion Pump for Hand Sanitizer 30ml- 1L, Montreal. 319 pp.         [Water and Gas Supply HDPE Pipe Extrusion Production Line 315mm]

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2021 New Design 3kwh off Grid Solar Power System LiFePO4 Battery for Home Use with Built-in Inverter, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Portable-Rorary Type DOT Peen Marking Machine for Metal.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Bloom Tech Chemical Reagent Bis ]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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