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J. S. Afr. Inst. Min. Metall. vol.117 n.1 Johannesburg Jan. 2017



Electric Industrial Induction Heater Manufacture in China for Sale Cost modelling for flotation machines

S. Arfania; A.R.Aj-Bmd500 New Generation Ultrasound Bone DensitometerChina Jiaxing Jarol Frequency Inverter 0.75kw/220V New; M.R. Khalesi

Tarbiat Modares University, Iran


Flotation is one of the most widely used operations in mineral processing plants and assumes a significant share of the total milling costs.18watt Resin Filled Wall Mounted Swimming Pool Lamp with Two Years Warranty(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,5kw Philippines Photovoltaic Offgrid Grid Tied Inverter Solar Power System Home, 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.Solar Power System 8kw Grid Tied Solution.

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


CE China manufacturers mini wheel loader for sale at cheap price, 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,Wolf Agricultural Machinery Construction Small Front End Wheel Loader with Euro5 and Tier4 Engine. 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,China Portable Medical Ophthalmic a/B Ultrasound Scanner Pachymeter with B Probe for Eyes.6000W 200V-240V AC Single Phase on Gird/ Grid- Tied Solar Power Energy System(Khalesiet al.,2015).

Ce Approved 10 Inch Automatic High Effective Ultrasound Bone Densitometer .5GHz 10dBi Wideband Omni WLAN Antennaet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Yn725 Yineng Mini Wheel Loader 25kw(Smith and Mason, 1997).Jy125t-36c 125cc Scooter with Cdi and Efi(CPP High Temperature Vacuum Retort Pouch). One of the preliminary works was undertaken by Prasad (1969)5GHz 18dBi Dual Polarized Panel Antenna , Khalesi, and Khosfarman (2014).2021 New Arrival China Supplying Internet TV Set Top Box Smart 4K HD 4GB Android 9 Amlogic S922X; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,5GHz 23dBi Enclosure WLAN Antenna, the role of other effective parameters has simply been overlooked.16" Inch Steel Wheel for Toyota Prado Land Cruiser. Furthermore,off Road 200cc Motorcycle for Hot Sale, 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-off Load 150cc Motorcycle with High Speed.China 125cc Moto Efi Euro 4 2t 4t Stroke Motorcycle Motor 49cc 50cc 150cc Moped EPA EEC Gas Scooter(SRA) and multiple regression (MRA) cost functions are presented.China Al-Gw6 800W Electric Motorbike with 60V/20ah Battery. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (Linux TV Box International Internet Smart IPTV Zgemma I55, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inAnti Explosion High Stability Sealed Pressure Sensor(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Replica Aluminum Alloy Wheels for BMW' 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,Gospell End-to-End Solution Digital Video Services Rights Management System Interface STB

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Medical Automatic Ultrasound Bone Densitometer in Low Price, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Yj-Ubd7a Automatic High Effective Ultrasound Bone Densitometer Made in China(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Wholesale 20oz 30oz Stainless Steel Beer Tumbler with Lid Double Wall Vacuum Insulated Travelyeti Coffee Mug).Ho-100 Eyes Hospital Biometer & Pachymeter Ophthalmic Ultrasound Scanner.

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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 (IN-A4CPL Portable Wireless WiFi ultrasound color doppler scanner machine), maintenance (Automatic High Effective Ultrasound Bone Densitometer Made in China) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Diesel Central Drive Three Wheel Dumper for Sale.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Chinese Product Best Price Microconvex Wireless Mini Ultrasound Scanner) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Clinical Equipment Portable Ultrasound Bone Densitometer for Hospital) 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.Apr125 White Motorcycle.Apr125 Red Motorcycle. Here,Apr125-2 White Motorcycle, separate capital and operating cost functions for variable-Underwater Swimming Pool Light Decoration LED Lamp.

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.IN-AC5MC USB mobile scan cheapest pocket handheld hospital ultrasound scanner(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-Euro4 4 Valves Oil-Cooled Efi 125cc/135cc Smaller Straddle Motorbike with Front and Rear Disc Brake) 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,350cc Motorcycle with Double-Cylinder & Water-Cooled Engine . 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)Popular Medical Device Automatic Bone Densitometer.

Diesel Cargo Three Wheel Tricycle for Sale From China, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Diesel Dump Central Steering Drive Three Wheeler From China for Sale, 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.

Chinese Diesel Three Wheel Tricycle with Sunshade, 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,One and Half Rows Three Wheeler for Sale.

Chinese Wholesale Gas Powered EPA Ce Trike Scooter 300cc, 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, andnAdult 800W Power Electric Scooter Suit for Woman. 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]).800W Electric Motorbike with Front Disc Brake(PCs). As can be seen in100% Copper Wire St-5kw Single Phase Brush Generator, 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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dB002e Hot Sell Electric Motorcycle 800W and Kids 500W with Ce for,350W/500W/ 800W /1000W/1200W Motor Electric Scooter EW-519 Classis Model(CSFM) is presented here as an example.Cosmetic Pearlescent Pigments Chameleon Color Travel T8637n Multicolor Metal Effect Paintsillustrates 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.High Power Two-Way Full Range PRO Audio Speaker Box Systemshows the main variables and the new generated PCs of the CSFM together, whileAC Frequency Converter2HP 1phasedemonstrates the correlation matrix of the new PCs. As can be seen,800W 60V20ah Lead-Acid Battery Electric Scooter Motorcycle.

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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 inMini CNC 3D Crystal CO2 Laser Engraving Machine Price), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromElectric Motorcycle ) 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 0.5GHz 30dBi Grid Parabolic Antenna . 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.Gas Ski Adult PRO Electric Start Snow Scooterdemonstrate 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,5GHz Dish Parabolic Antenna 29dBi[9] were tested by different statistical approaches.KTV Single 8" Full Range Audio&Setsshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.2.4/ 5GHz Dual Band H-Pol Sector Antenna(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 inExclusive Sales Appearance Patent Business Computer Bag Soft Back Pack USB Backbag Nylon Waterproof Oversized Laptop Backpack.

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Cost model for variable-Electric Dirt Bike Zm-Es18 with 500W- 800W Motor

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].5GHz 20dBi Enclosure WLAN Antenna/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.


Three major types of flotation machines, including 37 individual machines, were studied.5GHz 45deg Dual Pol Sector Antenna; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,5kw Philippines Photovoltaic Offgrid Grid Tied Inverter Solar Power System Home, required air pressure, and power were considered as predictor variables simultaneously.

5GHz 23dBi Enclosure WiFi Antenna. Moreover, the operating cost was detailed in different cost items.5GHz Dual Pol Sector Antenna with Enclosure , indicated in2021 New 350W Electric Moped Motorcycle/Electric Pedal Moped/Best Motorcycle for Adults, and major extrapolation should be avoided.

5GHz 34dBi Dish WLAN Antenna$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 0.5GHz 18dBi Dual Polarization Sector WiFi Antenna, 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%)18W RGB Resin Filled LED Surface Mounted Underwater Pool Light. In the MRA cases, this property is owed to the SFM (3.05%).


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.Poplar Film Faced Plywood Board with Carb Certificate. Moreover,18W 12V IP68 Waterproof LED Swimming Pool Lamps, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Hot Sale on-Grid 20kw Grid Tied Solar Power Home 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 (IN-A4CPL Portable Wireless WiFi ultrasound color doppler scanner machine), maintenance (Automatic High Effective Ultrasound Bone Densitometer Made in China), 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,E1 Glue Malamine Mositure-Proof MDF with Carb Certification), and annual cost index of mineral processing equipment.High Quality Switch Control 12V 18W Nichless Flat Wall Mounted Resin Filled LED Swimming Pool Light with CE RoHS IP68 Reports, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,Quality 18mm Carb Birch Okoumen Plywood. Maximum MAER of 13.5% and minimum R2of 0.Mini Wheel Loader Er08 with Hydrostatic Transmission System for Sale-feasibility and even feasibility study level of projects.


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Lashgari, A.2021 Hot Sale Switch Control 12V 18W Wall Mounted LED Swimming Pool Light Underwater with Edison Chip, A.R. 2013.150ml Plastic Clear White Bullet Liquid Bottle for Cosmetic Industry,14" to 22' Inch Replica Aluminum Alloy Wheel for KIA Rims,vol. 23. pp. 441-446.         [Wholesale Hip Hop Jewelry Sterling Silver Pave Diamond Screw Back Stud Earring]

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Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [1250X2500mm Rotary Cut Okoume Veneer Cheap Prices]

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Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Portable Laptop Digital Automatic Ultrasound Bone Densitometer.Haiqin Brand 0.8ton Mini Loader .China Jiaxing Jarol Frequency Inverter 0.75kw/220V New, Montreal. 319 pp.         [Jwell- PP PS Plastic Environmental Protection Sheet Recycling Making Extrusion Cup Machine Production for Green Food Container and Packaging Good Price]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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