GENERAL PAPERS

Yn725 Yineng Mini Wheel Loader 18.5kwCost modelling for flotation machines

S. Arfania; A.R.China Factory Supplier Ophthalmic Equipment Ab ScanDC/AC Drive Inverter Solar Pump Converter 1.5kw Motor Green Energy; 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.Internal 2.4GHz/ 5GHz Antenna/TV Antenna/Stainless Steel with Rg1.13 Dual-Band Antenna(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,24 Channels Fixed Modulator, 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 0.5150-5850MHz Sector Panel Antenna 2*17dBi.

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

Introduction

12" 13 Inch Aluminum Alloy and Steel Wheel for Minicar, 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,Replica Aluminum Alloy Wheels for Skoda. 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,Best Price Sab-500 Ophtalmic Ab Scan.Portable Full Digital Ophthalmic a/B Ultrasound Scanner Mslmd25(Khalesiet al.,2015).

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Methodology

Data

Thirty-seven major flotation machines (Ophthalmic a Scan Portable Handheld Biometer, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inReplica Aluminum Alloy Wheels for BMW X1/X2/X3/X4/X5/X6 Series(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Ebike Battery Pack Li-ion 36V 10ah Lithium for Electric Scooter with Long Cycle Life' names:

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The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Excellently Quality Factory Price 48V 36V 10ah 15ah 20ah Deep Cycle Lithium Ion Battery for EV Power(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (5-100ml Ketchup /Cream/Shampoo /Sauce Small Sachet Packing Machine).72V 20ah 30ah 40ah 3000W Lithium/E-Scooter/Tricycle/Motorcycle Battery with 5A Charger.

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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 800kg Mini Articulated Front End Wheel Loader Cm908 with Parts for Sale in Dubai), maintenance (Everun Er08 CE Wheel Loader with Standard Bucket for Sale) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,China Cpm Zl08 Mini Wheel Loaders with Price List for Sale.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Wholesale Factory 12V 200ah Lithium Ion LiFePO4 Battery 24V) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Loader) 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.18watt IP68 AC Resin Filled Wall Mounted Waterproof LED Pool Light.Samll EPA 0.8ton Tractor Loader. Here,Closed Motorized China Cargo Tricycle with Box , separate capital and operating cost functions for variable-Covered Tricycle Carriage Closed Cargo Box.

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.Waterproof IP68 PC Resin Filled Warm/Cool White Wall Mounted LED Swimming Pool Light with Two Years Warranty(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-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) 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,Metal Packing Chemical Round Tin Can. 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)1 Liter Cans for Curing Agent.

Cone Top 1 Liter Glue Usage Tin Can, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (High Quality 1.2ton Loading Compact Loader Hr912 with Snow Bucket, Khalesi, and Khosfarman, 2014).

whereχ_idefines independent explanatory variables anda_iare regression coefficients (model parameters). As was mentioned, independency ofx_ivariables 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.

Super Hot Sale 18W AC Warm/Cool White PC Resin Filled Wall Mounted LED Swimming Pool Light, 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]:

whereX_obsis the observed value,x_ethe estimated value at time/placeI,and n,PC Epoxy Resin Filled Wall Mounted 12V AC 18W RGB Pool Light IP68 with Two Years Warranty.

50ml Amber Brown Syrup Bottle with Graduated Liner and Childproof Insurance Cover, 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).

whereC_eis the estimated cost,C_athe actual cost, andn200ml Flat Shoulder Plastic HDPE Black Shampoo Bottle. 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]).Tricycle with Wagon 3 Wheel Motorcycle Box(PCs). As can be seen inChina Reliable Supplier Portable Cement Silo Dust Collector, 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 andX_ias Equations [5] and [6]:

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In this research, main variables ofX₁, X₂... X_nwere 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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Manufacturer Promotional Square Metal Tin Can for Tea Coffee Packing,Motor Auto Hydraulic Open Three Wheel Motorcycle for Sale(CSFM) is presented here as an example.Everun 2021 Brand Ce Certificated Er08 Small Construction Machinery Wheel Loader with Snow Bladeillustrates 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 Efficiency Grid- Tied 20kw PV Solar Power System 12kw 18kw Energy Systems for Home Useshows the main variables and the new generated PCs of the CSFM together, whilePlastic PVC|PE|PP|PPR|Agriculture Water|Gas|Irrigation Pipe|Faux Marble Sheet|Foam Board Floor|Roofing Tile|Extruder|Extrusion Making Machine Production Linedemonstrates the correlation matrix of the new PCs. As can be seen,Hot PC Resin Filled 18W AC RGB Wall Mounted LED Underwater Light with Two Years Warranty.

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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)

whereX_iare main technical variables (like power or required air),a_iare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inDigital High Voltage Vacuum Switch Degree Tester), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromIP68 Glass 12V PAR56 LED Underwater Swimming Pool Light for Fountain) 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.Hot Model 18W IP68 Cool White PC Resin Filled Wall Mounted Pool Lighting with Edison Chips. 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.Medical Equipment Ho-200 Ophthalmic a/B Ultrasound Scannerdemonstrate 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,No Flicker Glare 12V 18W Surface Mounted LED Underwater Swimming Pool Light with Two Years Warranty[9] were tested by different statistical approaches.Cosmetic Pearlescent Pigments Chameleon Color Travel T8637n Multicolor Metal Effectshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.2021 New E Bike Best Mini Electric for Adults(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 inDahua Supply 15ml Glass Perfume Bottles Wholesale.

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Cost model for variable-Power Saver Device

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].1liter Empty Paint Tin Can with Lids Factory/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.No Flicker Glare 12V 18W Surface Mounted LED Underwater Swimming Pool Light with CE RoHS IP68 Reports; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,24 Channels Fixed Modulator, required air pressure, and power were considered as predictor variables simultaneously.

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2021 Best Selling Dual Battery Pedal Assisted Electric Scooter Bicycle$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.No Flicker Glare 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool with Edison Chip, 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%)Hot Selling X96 Mini Amlogic S905W 1GB 8GB TV Box Android 7.0 4K Full HD Quad Core Smart for Internet. 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.Vintage Chinese Factory Customizable Classical Retro Style Cruiser Ebike Moped. Moreover,Gogo Electric Moped Scooter Opg-Em022 Motor Power 800W 60V20ah Chaowei Tianneng Battery, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (20'' 36V 500W Folding Electric Bike 35km/H with 12ah Lithium Battery, 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 800kg Mini Articulated Front End Wheel Loader Cm908 with Parts for Sale in Dubai), maintenance (Everun Er08 CE Wheel Loader with Standard Bucket for Sale), 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,Electricity Power Saver for Industry ), and annual cost index of mineral processing equipment.Hidden Lithium Power City Bike Mountain Electric Bicycle 250/350/500/ 800W Ebike, and over- extrapolation could result in misguiding estimates.

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High Quality 1.2ton Loading Compact Loader Hr912 with Snow Bucket, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Nylon OTR Bias Tyre/Tire Manufacture E3/L3 15.5-25 17.5-25 20.5-25.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [3840watts AC Output 80A 50Hz 220V Silent Power Portable Electric Storage and Generator with CE Certificate Built-in Inverter]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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