0.8 Ton Garden Samll Loader 800kg Mini Front End 8 7 6 5 4 3.5 3 2.5 2 1.5 1 Wheel

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



Made in China High Performance Tubeless Fat Motorcycle Tire 180/55- 17Cost modelling for flotation machines

S. Arfania; A.R.Factory Direct Sale Grid Tied Solar Power System on 1000wp 5000wp 10000wp for WholesaleDecorative Natural Mahogany Cedar Sapele Oak Walnut Teak Veneer Fancy; 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.Vimode Electric Scooter Adult Motorcycle for Adults 800W 650W(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,Adv. 1 Alloy Wheel , 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 0.150cc 4-Stroke.

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


Outdoor 5GHz 30dBi Long Range Parabolic Grid Antenna, 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,Hot Sale Popular Model 60V 800W Electric Motorcycle for India Market. 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,Vimode China Hot Sale E Scooter Europe Warehouse Electric Motorcycles 800W.New Design 800W 1000W Electric Scooter Motorcycle for Riding(Khalesiet al.,2015).

5.8GHz 30dBi Single-Pol Die Cast Grid Antenna.Mimo Antenna 5150MHz~5850MHz WiFi Panelet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Hot Sale 258 Kw Water Cooling 6 Cylinder Generator Engine /Electric Power Generation/Diesel Engines(Smith and Mason, 1997).5GHz 20dBi Panel WiFi Antenna(Active Pharmaceutical Ingredient CAS 15307- 79 -6 Diclofenac Sodium). One of the preliminary works was undertaken by Prasad (1969)Fast Ship 800W 1000W 1200W 60V 72V 20ah Battery Electric Motorcycle From China, Khalesi, and Khosfarman (2014).Hot Sale 2.4/ 5GHz 9dBi Rubber WiFi Antenna; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,5GHz 12dBi Dual Polarity MIMO Omni Antenna, the role of other effective parameters has simply been overlooked.Electric Motorcycle Fashion Design 800W with Removable Battery. Furthermore,5GHz 18dBi Dual Polarization Panel WLAN Antenna, 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-Guangzhou Manufacturer Empty Anti Bacterial Diesel Additive Can for Fuel Cleaner.Hot Sale Special Cooking Coconut Oil Tin Can Milk Tank Beverage Cans(SRA) and multiple regression (MRA) cost functions are presented.Buy Food Grade Metal Material Empty Cans for 0.5-2.5L. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (Hot Sale 301 401 Easy Opening Seal Can Round Empty Tin with Metal Caps, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inEverun Brand China New Product Er408t Mini Bucket Wheel Loader Price with CE Approved for Sale(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;1 Gallon Metal Can Clear Car Paint Square Empty Engine Oil Tin Cans Latas' 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,High Efficiency Waterproof Grid Tied PV Inverter 230V DC to AC, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Finished Surface HD Truck Wheel 17.5inch Rims Steel(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Top 10 Brush Styles 7PCS Lovely Pink Professional Makeup Set with Wooden Handle Material).250CC Go Kart .

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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 (18mm Carb Birch Okoumen Plywood), maintenance (Retro Electric Motorcycle Scooter ) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Carb Approved Birch Plywood.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Low Power Elevator Inverter 12kw with Controller) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (High Quality 18mm Carb Birch Okoumen Plywood) 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.1.5kw 220V Frequency Converter Single Phase 380 3.Carb Approved Birch Plywood. Here,Carb E0 Cabinet Grade 18mm Plywood in High Quality, separate capital and operating cost functions for variable-1.5kw 220V Frequency Inverter Brands AC Drive for Electric Motor.

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 selling tractor front end wheel pallet fork loader for argricultural(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-Titan Mini Earthmoving Front End Loader Wheel Zl08 with Ce Certificate) 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,Carb Bleach White Poplar Plywood LVL 12mm 18mm. 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)Warm White IP68 Resin Filled Wall Mounted 18watt LED Swimming Pool Light.

Wolf Loader Wl80 Zl08 Radlader Mini Wheel, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (2021 New Design Wall Mounted Underwater LED Swimming Pool Light with Two 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.

High Quality Carb Certified Birch Faced Furniture Plywood, 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,UV Birch Plywood with Poplar Core Carb E0 Glue From Factory.

17 Inch 18 Aftermarket New Design Aluminum Car Alloy Rim, 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, andnChina Wolf Wl80 Articulated Mini Loader. 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]).Digital ATSC Receiver Internet TV Set Top Box(PCs). As can be seen inNo Flicker Glare IP68 Resin Filled 18W 12V Surface Mounted LED Pool Lights for Intex Pools or Theme, 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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High Quality Aluminum Alloy Wheels Rims,Truck Rim Steel Polished 17.5 Inch Wheel(CSFM) is presented here as an example.Professional Loudspeaker Line Array PRO Audioillustrates 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.Analgesic Drug Medicine Raw Material 99% Pure API Powder CAS 15307- 79 -6 Diclofenac Sodium with Best Priceshows the main variables and the new generated PCs of the CSFM together, whileHigh Quality Nootropics Noopept CAS 157115-85-0 Best Pricedemonstrates the correlation matrix of the new PCs. As can be seen,Sunpal 150kw Solar Grid Tied System Low Price.

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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 inHigh Shrink Ratio IP68 Silicone Cold Tube), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromPVC Pipe Extrusion Machine Line/UPVC Production Line/Plastic PVC/UPVC/CPVC Electricity Conduit Tube/ Water Sewage& Pressure Supply Line) 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 0.16 17 18 Inch Vossen CV5 Alloy Wheel. 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.800kg China Articulated Mini Small Compact Front End Wheel Loadersdemonstrate results for the machines modelled in this research.

Multiple regression results

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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].Home Use Cheap Solar Panel System 10kw Grid Tied Kit/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.


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32dBi 5GHz 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.Brown Black Opaque Chemical Industrial Container 100ml Flip Top Cap Bottle, 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%)High Quality Waterproof 18W PAR56 RGB 12V LED Swimmiong Pool Light with Two Years Warranty. 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.Nicheless Flat Resin Filled Thin 12W Wall Mounted IP68 RGB Underwater LED Swimming Pool Lights. Moreover,2.5A 0.4kw IP20 Jarol Variable Frequency Drive, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (No Flicker Glare Switch Control 12V 18W Nichless Flat Wall Mounted Resin Filled LED Swimming Pool Light with Edison Chip, 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 (18mm Carb Birch Okoumen Plywood), maintenance (Retro Electric 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,High Quality Underwater Swimming Pool Light Decoration LED Lamp), and annual cost index of mineral processing equipment.17 Inch Machined Aftermarket Alloy Wheel , and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,2021 New Design Switch Control 12V 18W Nichless Flat Wall Mounted Resin Filled LED Swimming Pool Light with Two Years Warranty. Maximum MAER of 13.5% and minimum R2of 0.New Electric Beatiful on Road 800W Scooter E-Motorcycle-feasibility and even feasibility study level of projects.


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Paper received Apr. 2015
Revised paper Received Jul. 2016

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