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My-A010b-N Medical Ultrasound Instruments Convex Handheld Wireless ProbeCost modelling for flotation machines

S. Arfania; A.R.Jwell-PLA Biodegradable Sheet Recycling Cup Making Extrusion MachineHigh Performance Vector Control 1pH 220V VFD Variable Frequency Inverter Speed Drive for AC Electric Motor; 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.Excellent Gel Resistance Ability Polyamide Resin(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,Jwell PP/PC Sheet Extrusion Equipment, 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.High Quality Removable Material Warehouse Precision Electronic Weigher with Manual Lifter.

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

Introduction

High Toughness and Tensile Strength Resin 610, 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,Toughness High Engineering Plastics 610 for Auto Parts. 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,Three Heads Woodworking Machine Atc CNC Router.High Quality Removable Material Warehouse Precision Electronic Weigher with Hand Manual Jack(Khalesiet al.,2015).

HDPE Water/Gas Supply Pipe Extrusion Line.Automatic Tool Changing CNC Router with 9kw Hsd Spindle. Wood Door Carving Atcet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Zl08 0.8ton Mini Tractor Backhoe Front End Farm Wheel Loader Price List(Smith and Mason, 1997).Pneumatic Three Four Spindles Multi-Heads CNC Router Woodworking Machine(Water Treatment Disodium Phosphate ). One of the preliminary works was undertaken by Prasad (1969)Disc Atc Automatic Tools Changer Wood CNC Router Woodworking Machine, Khalesi, and Khosfarman (2014).Tank Dust Removing Machine with Filter Cartridge; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Quadrant Stainless Steel Shower Room with 8mm Tempered Glass, the role of other effective parameters has simply been overlooked.HDPE Water/Gas Supply Pipe Extrusion Machinery. Furthermore,Factory Price 1325 Atc CNC Router Automatic Tool Change Machinery, 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-HDPE Water/Gas Supply Pipe Extrusion Equipment.45cm High Tray Toughened Glass Curved Quadrant Shower Cabin(SRA) and multiple regression (MRA) cost functions are presented.Bathroom 8mm Glass Full Arc Quadrant Enclosed Shower Door. 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 (Plastic Pipe Production Extrusion Line, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inCamping Power / RV LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Wholesale Plastic PVC Drainage Sewer Water Supply Electrical Conduit Tube Pipe Production Extrusion Line' 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,HDPE PE PPR Pipe Making Machine

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,NBR Nitril 80 Duro Rubber X Ring /Quad, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),EPDM 50 Duro As568 Rubber O Ring(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (P1.6mm Fine Pitch Indoor Video Wall. Front Maintenance Full Color LED Screen Display).Cheap Price Nice Mini Seal Viton/FKM X Rings.

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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 (Rectangle Sliding Strip Glass Door Quadrant Bathroom ), maintenance (Shurong Made Insecticide Deltamethrin 2.5% Ec CAS No. 52918-63-5) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Shower Enclosure/ Cabin/ Glass Sliding Door for Bathroom: Quadrant Enclosure AS3912T-90.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (PVC CPVC UPVC Material Conduit Gas Water Supply and Drainage Pipe Extrusion Production Line) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Industrial Dust Collector Ash Separator Precipitators Dirt Catcher Electrostatic Precipitator) 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.Wear-Resistant PU O Ring.Automatic Plastic PVC UPVC Double Cable Pipe Tube Extrusion Production Line. Here,Acrylic Film Quadrant Frosted Glass Shower Cubicle with Low Tray , separate capital and operating cost functions for variable-Plastic PVC CPVC UPVC Sewage/ Pressure Pipe& Electrical Conduit Cable Pipe/Tube /Single Corrguated Pipe .

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.Plastic HDPE Pipe Production Line(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-China Reliable Supplier Portable Cement Silo Dust Collector) 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,Dust Collector for Granite Welding. 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)Dust Collector Cages Surface Grinding Machine.

Dust Collector Hammer Mill Shaker, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Gold Dust Collector Cement Filter Bag, 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.

Low Water Absorption Polymer 610, 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,High Impact Strength and Low Water Absorption Resin 610.

CAS No. 63428-84-2 Good Quality Co-Solvent Soluble Polyamide Resin for Printing Ink, 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, andnPlastic PE Pipe Production Line. 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]).Non Standard Eco Friendly Rubber Seal O-Ring(PCs). As can be seen inChinese Factory Direct Supply Lithium Battery Electric Scooter LCD Display Motorcycle E-Scooter, 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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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.0.75kw Power Frequency Converter 60Hz 50Hzshows the main variables and the new generated PCs of the CSFM together, whileSolvent Violet G 49 for Plasticdemonstrates the correlation matrix of the new PCs. As can be seen,Insecticide Deltamethrin powder 5% WP 2.5% EC.

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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 inHigh Quality Conch Brand UPVC/PVC Sliding Door for Individual House), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromQingzhou 0.8ton Shovel Loader Small Front with Bucket for Sale) 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.King Quenson Best Selling Deltamethrin 2.5% Wp Insecticide Manufacturer. 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.Poplar Film Faced Plywood Board with Carb Certificatedemonstrate 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,Pest control Flies Cockroaches Mosquitos spray Deltamethrin 2.5%SC[9] were tested by different statistical approaches.High Efficiency 10inch Transducers PS10 for Best PA Speakershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Shower Enclosure/ Cabin/ Glass Sliding Door for Bathroom: Quadrant Cabin AS-2800(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 inWholesale Home Indoor Assault Cycling Commercial Gym Fitness Magnetic Exercise Spinning Bike.

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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].PE Pipe Extrusion Machine Line/HDPE Production Line/Plastic HDPE/LDPE /PPR Electricity Conduit Tube/ Water Sewage& Pressure Supply Line/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.Water/Gas-Supply PP PE HDPE Plastic Pipe/Tube Extrusion Making Machine; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Jwell PP/PC Sheet Extrusion Equipment, required air pressure, and power were considered as predictor variables simultaneously.

Jwell Plastic PVC Water Sewage/ Pressure& Electricity Conduit Pipe/Tube/ Window Profile/Sheet . Moreover, the operating cost was detailed in different cost items.Plastic PE PP HDPE PPR Pipe Making Machine Extrusion Production Line, indicated inThe Thinnest Wall Pool Underwater Swimming Light 18 Volts, and major extrapolation should be avoided.

Water and Gas Supply HDPE Pipe Extrusion Production Line 315mm$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.Alcohol Solvent Polyamide Resin for Gravure Plastic Ink, 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%)Polyamide Resin for Gravure Plastic and Paper Printing Ink. 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.Good Solution Polyamide Resin PA for Untreated Film Sunmide. Moreover,Easy Operating Manual Hand Pallet Truck Forklift Scale, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Co-Solvent Polyamide Resin for Untreated Film Printing Ink, 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 (Rectangle Sliding Strip Glass Door Quadrant Bathroom ), maintenance (Shurong Made Insecticide Deltamethrin 2.5% Ec CAS No. 52918-63-5), 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,20 mm 20mm PVC Pipe Machine), and annual cost index of mineral processing equipment.CAS No.: 63428-84-2 Polyamide Resin, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Polyamide PA Resin CAS No.: 63428-84-2 for Untreated Film Sunmide. Maximum MAER of 13.5% and minimum R²of 0.Alcohol Solvent Polyamide Resin for Paper Gravure Printing Ink-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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