GENERAL PAPERS

Farm Machinery Zl08f Mini Wheel Loader with 4 in 1 BucketCost modelling for flotation machines

S. Arfania; A.R.Easy Operating Manual Hand Pallet Truck Forklift Scale15.5-25 17.5-25 20.5-25 23.5-25 OTR Tire; 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.Co-Solvent Polyamide Resin for Untreated Film Printing Ink(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,20 mm 20mm PVC Pipe Machine, 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.CAS No.: 63428-84-2 Polyamide Resin.

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

Introduction

Polyamide PA Resin CAS No.: 63428-84-2 for Untreated Film Sunmide, 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,Alcohol Solvent Polyamide Resin for Paper Gravure Printing Ink. 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,Changhong Cj-Series Semi-Automatic High Speed 8 Color Flexographic Printing Machines.Hot Sale Popular Use Insecticide Deltamethrin 2.5 Sc for Crop Health(Khalesiet al.,2015).

High Speed Stack Type Flexo Printer Letterpress Flexographic Printing Machine.Small Cheap Quadrant Simple Fiberglass Hinge Shower Enclosure et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Bulksupplement Vitamin a Acetate 0.5miu Ws Feed Grade CAS No 127-47-9(Smith and Mason, 1997).Benzene Soluble CAS No.: 63428-84-2 Polyamide PA Resin for Untreated PE/PP(GMP Factory Supply High Quality Anesthesia Levobupivacaine Pain Release CAS: 27262-48-2). One of the preliminary works was undertaken by Prasad (1969)China Best Pest Control Insecticide Deltamethrin 5% Ec Supplier Neocidol, Khalesi, and Khosfarman (2014).Benzene Soluble Polyamide Resin for Flexo Printing Ink; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Premium quality and very competitive price for Permethrin 25% EC, the role of other effective parameters has simply been overlooked.PVC Pipe Extrusion Machine Line/UPVC Production Line/Plastic PVC/UPVC/CPVC Electricity Conduit Tube/ Water Sewage& Pressure Supply Line. Furthermore,High Quality Removable Material Warehouse Precision Electronic Weighing Scale with Manual Hand Telehandler, 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-Permethrin 25% EC Pesticide & Insecticides.China Jwell PVC Dual/Four Pipe High Speed Extrusion Equipment C-PVC/U-PVC/PVC-O Making Machine(SRA) and multiple regression (MRA) cost functions are presented.HD250-5/7 Arm Boom Bucket Cylinder Seal Cyl for Kato. 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 (Ergonomic Design AC 3000kg Trolley Hydraulic Hand Pallet Truck, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inKaraoke Microphone Bluetooth Sound Mixer Video Conference(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;PVC Garden Pipe Making Machine Cost' 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,3ton Hydraulic Hand Pallet Truck Trolley Special

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,2000kg Mini Cheap Price Nylon Wheel Hand Hydraulic Pallet Truck, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Direct Sale Polyamide PA Resin for Ink(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Cute Animal Cat Brooch Metal Custom Hard Enamel Pin Badge for Women).CAS No. 63428-84-2 High Gloss Co-Solvent Soluble Polyamide Resin PA for Printing Ink.

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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 (Plastic PVC|PE|PP|PPR|Agriculture Water|Gas|Irrigation Pipe|Faux Marble Sheet|Foam Board Floor|Roofing Tile|Extruder|Extrusion Making Machine Production Line), maintenance (Warehouse Transporting Equipment Hydraulic Nylon Wheel Hand Manual Pallet Truck) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Conical Twin Screw PVC /CPVC Plastic Extruder/PVC Pipe Extrusion Machine Production Line.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (PVC Vacuum Calibrated Tank 160mm) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Material Handling Equipment Manual Hand Pallet Jack) 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.Excellent Quality Hydraulic Arm Cyl Seal for E307D Excavator.Factory Manufacture E307D Bucket Cyl Kit Seal. Here,Excavator Cylinder Seal for E307b Boom Cyl Repair Parts, separate capital and operating cost functions for variable-Arm Cyl Oil Seal Kits for Sumitomo.

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.Komatsu PC270-7 Arm Cyl Ket(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-Deltamethrin 2.5% EC Pesticide & Insecticides) 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,Manufacture! OEM Komatsu PC50uu-2 Bucket Cyl Seal Ket. 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)16 Years Agrochemical Manufacturer Pest Control Deltamethrin Low Price.

Deltamethrin 98% Tc Insecticide 2.5 Sc Wholesale 2021, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Top Quality Insecticide Classification Deltamethrin 98%TC, 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.

Highly Effective Deltamethrin , 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,Chrome Quadrant Shower Enclosure with Plastic Double Roller.

Frame Quadrant Glass Curved Shower Cubicle for Sale Price, 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, andnQuadrant Stainless Steel Corner Shower Enclosure for Hotel with Customized Size and Color. 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]).Quadrant Framed Shower Enclosure/ Cabin / Cubicle (PCs). As can be seen inLow Failure Rate High Efficiency Induction Metal Heating Machine , 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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Deltamethrin 7g/L + Dimethoate 180g/L Ulv of Insecticide Pesticide & Acaricide,Deltamethrin 2.5% Wp of Insecticide Pesticide(CSFM) is presented here as an example.20W Fiber Laser Color Marking Machine for Colorful on Stainless Steelillustrates 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.UV Protection Agent 2-Phenylbenzimidazole CAS 716- 79 -0 Mesh Number Can Be Customized Exogenous Biological Compoundsshows the main variables and the new generated PCs of the CSFM together, while15kw Grid Tied Solar Systemdemonstrates the correlation matrix of the new PCs. As can be seen,Insecticide Deltamethrin 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 inCheap Custom Heat Transfer Printed Gradually Changing Color Neck Lanyard Strap for Publicity), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromYn725 Yineng Mini Wheel Loader 18.5kw Cabin) 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.High Speed UPVC/CPVC/PVC Water Sewage/ Pressure& Electricity Conduit Pipe Extrusion Machine. 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.0.8ton Contruction Machine Mini Small Wheel Loader with Bucketdemonstrate 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,Komatsu Boom Cyl Ket for PC300-5[9] were tested by different statistical approaches.Act MP 48 ECU Switch/Act 2568d Switchshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.PPR Pipe/HDPE Pipe/PVC Pipe /UPVC Machine Manufacturer Factory(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 inCheap Oxygen Concentrator with Oximeter.

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Cost model for variable-Komatsu Boom Cyl Ket for PC400-6

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].Komatsu Bucket Cyl Ket for PC300-5/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.Hyundai Excavator Hydraulic Cylinder Bucket Seal Kit for R210; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,20 mm 20mm PVC Pipe Machine, required air pressure, and power were considered as predictor variables simultaneously.

Ex200-1/2/3/4/5 Arm Cyl Oil Seal Kit for Hitachi. Moreover, the operating cost was detailed in different cost items.Factory Direct Sale Polyamide PA Resin for Ink and Adhesives, indicated inWholesales Aminobutyric Acid Organic Solvents 1litre Reagentplus T-Butyrolactone Fast Delivery, and major extrapolation should be avoided.

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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.Used for Brushing PA610 with High Tensile Strength. Moreover,Polyamide Fabric PA, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Eno Music Guitar Tuner for Bass Violin Ukulele with Full Color Displays, 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 (Plastic PVC|PE|PP|PPR|Agriculture Water|Gas|Irrigation Pipe|Faux Marble Sheet|Foam Board Floor|Roofing Tile|Extruder|Extrusion Making Machine Production Line), maintenance (Warehouse Transporting Equipment Hydraulic Nylon Wheel Hand Manual Pallet Truck), 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,Adjust Guitar Voice Tuner LED Display), and annual cost index of mineral processing equipment.High Quality Nylon Plated Classical Guitar Accessory Strings, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Senior Electric Guitar . Maximum MAER of 13.5% and minimum R²of 0.Acoustic and Electric Guitar Hard Ware Machine Head Mh-3692-feasibility and even feasibility study level of projects.

References

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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