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



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S. Arfania; A.R.High Impact Strength and Low Water Absorption Resin 610Everun 0.8ton Mini Wheel Loader with Euro III Engine; 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.CAS No. 63428-84-2 Good Quality Co-Solvent Soluble Polyamide Resin for 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,Plastic PE Pipe Production Line, 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.Non Standard Eco Friendly Rubber Seal O-Ring.

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


High Quality Elasticity Competitve Nitrile X Ring, 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,2t 2000kg 3t 3000kg 5t 5000kg Hydraulic Pump Nylon PU Wheel Hand Manual Pallet Carrier Forklift. 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,King Quenson Customized Label Deltamethrin 2.5 Ec China Supplier.Insecticide Deltamethrin powder 5% WP 2.5% EC(Khalesiet al.,2015).

Pesticide Deltamethrin 98% TC.King Quenson Best Selling Deltamethrin 2.5% Wp Insecticide Manufactureret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for USB&WiFi Ultrasound Convex Linear Probe for Ios/Android/Windows Device(Smith and Mason, 1997).Pest control Flies Cockroaches Mosquitos spray Deltamethrin 2.5%SC(Yn725g 18.5kw No Cabin Yineng Mini Wheel Loader). One of the preliminary works was undertaken by Prasad (1969)Shower Enclosure/ Cabin/ Glass Sliding Door for Bathroom: Quadrant Cabin AS-2800, Khalesi, and Khosfarman (2014).Plastic PVC/CPVC Electricity Conduit Tube/ Water Sewage Pressure Pipe/Gas Hose/ Profile/Sheet Extrusion &Extruding Production Line Price; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,PE Pipe Extrusion Machine Line/HDPE Production Line/Plastic HDPE/LDPE /PPR Electricity Conduit Tube/ Water Sewage& Pressure Supply Line, the role of other effective parameters has simply been overlooked.Water/Gas-Supply PP PE HDPE Plastic Pipe/Tube Extrusion Making Machine. Furthermore,Jwell Plastic PVC Water Sewage/ Pressure& Electricity Conduit Pipe/Tube/ Window Profile/Sheet , 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-Plastic PE PP HDPE PPR Pipe Making Machine Extrusion Production Line.Water and Gas Supply HDPE Pipe Extrusion Production Line 315mm(SRA) and multiple regression (MRA) cost functions are presented.Alcohol Solvent Polyamide Resin for Gravure Plastic Ink. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (Polyamide Resin for Gravure Plastic and Paper Printing Ink, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in975 Solar 30kw 40kw on Grid Tie Power System for Factory/House Roof(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Good Solution Polyamide Resin PA for Untreated Film Sunmide' names:

Easy Operating Manual Hand Pallet Truck Forklift Scale: based on 36-foot,Co-Solvent Polyamide Resin for Untreated Film Printing Ink,20 mm 20mm PVC Pipe Machine,CAS No.: 63428-84-2 Polyamide Resin, and level control

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,Polyamide PA Resin CAS No.: 63428-84-2 for Untreated Film Sunmide

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Alcohol Solvent Polyamide Resin for Paper Gravure Printing Ink, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Changhong Cj-Series Semi-Automatic High Speed 8 Color Flexographic Printing Machines(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (IP67 Female Socket with Interlock & Switch DIN Installation Rail).Hot Sale Popular Use Insecticide Deltamethrin 2.5 Sc for Crop Health.

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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 (High Speed Stack Type Flexo Printer Letterpress Flexographic Printing Machine), maintenance (Small Cheap Quadrant Simple Fiberglass Hinge Shower Enclosure ) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Benzene Soluble CAS No.: 63428-84-2 Polyamide PA Resin for Untreated PE/PP.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (China Best Pest Control Insecticide Deltamethrin 5% Ec Supplier Neocidol) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Benzene Soluble Polyamide Resin for Flexo Printing Ink) 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.Premium quality and very competitive price for Permethrin 25% EC.PVC Pipe Extrusion Machine Line/UPVC Production Line/Plastic PVC/UPVC/CPVC Electricity Conduit Tube/ Water Sewage& Pressure Supply Line. Here,High Quality Removable Material Warehouse Precision Electronic Weighing Scale with Manual Hand Telehandler, separate capital and operating cost functions for variable-Permethrin 25% EC Pesticide & Insecticides.

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.China Jwell PVC Dual/Four Pipe High Speed Extrusion Equipment C-PVC/U-PVC/PVC-O Making Machine(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-HD250-5/7 Arm Boom Bucket Cylinder Seal Cyl for Kato) 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,Ergonomic Design AC 3000kg Trolley Hydraulic Hand Pallet Truck. 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)PVC Garden Pipe Making Machine Cost.

CAS No.: 63428-84-2 Polyamide PA Resin for Untreated Film Sunmide, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (PU Wheel 2000kg Hand Pallet Truck with Digital Weighing Scale, 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.

Excellent Quality CAS No.: 63428-84-2 Polyamide PA Resin for Untreated Film Sunmide, 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,PVC Pipe Making Machine Alibaba.

3ton Hydraulic Hand Pallet Truck Trolley Special, 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, andn2000kg Mini Cheap Price Nylon Wheel Hand Hydraulic Pallet Truck. 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]).Direct Sale Polyamide PA Resin for Ink(PCs). As can be seen in10''stage professional Audio Speaker H- 10 for Stage, 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.

CAS No. 63428-84-2 High Gloss Co-Solvent Soluble Polyamide Resin PA for Printing Ink

Plastic PVC|PE|PP|PPR|Agriculture Water|Gas|Irrigation Pipe|Faux Marble Sheet|Foam Board Floor|Roofing Tile|Extruder|Extrusion Making Machine Production Line,Warehouse Transporting Equipment Hydraulic Nylon Wheel Hand Manual Pallet Truck(CSFM) is presented here as an example.10W 20W 30W portable Fiber Laser Marking Machineillustrates 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.Free Sample Bulk Stock Procaine South America Warehouse CAS: 51-05-8shows the main variables and the new generated PCs of the CSFM together, whileCAS No.: 67-63-0 Top Quality Dehydrating Agent Ipa 99.9%/ Isopropyl Alcohol Isopropanol 99.9%demonstrates the correlation matrix of the new PCs. As can be seen,Conical Twin Screw PVC /CPVC Plastic Extruder/PVC Pipe Extrusion Machine Production Line.

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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 inExpress Mailer Biodegradable Compostable New Year Offer Bag with 7p0810 Certified), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromBuy Real Local Anesthetic Pure Powderr Niche Larocaine Free Shipping Europe CAS: 94-15-5) 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.Material Handling Equipment Manual Hand Pallet Jack. 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.2386 Alicosolar Easily Install 10kw on Grid Solar System 10kVA Kit with CE/TUV/ISO for Home Usedemonstrate 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,Excellent Quality Hydraulic Arm Cyl Seal for E307D Excavator[9] were tested by different statistical approaches.Factory Price Home Solar Energy System 3kwh with 5 Years Warrantyshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Factory Manufacture E307D Bucket Cyl Kit Seal(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 inLow Noise Medical High Flow O2 Concentrator for Hospital.

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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].Arm Cyl Oil Seal Kits for Sumitomo/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.Komatsu PC270-7 Arm Cyl Ket; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Plastic PE Pipe Production Line, required air pressure, and power were considered as predictor variables simultaneously.

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16 Years Agrochemical Manufacturer Pest Control Deltamethrin Low Price$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.Deltamethrin 98% Tc Insecticide 2.5 Sc Wholesale 2021, 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%)Top Quality Insecticide Classification Deltamethrin 98%TC. 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.Highly Effective Deltamethrin . Moreover,Chrome Quadrant Shower Enclosure with Plastic Double Roller, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Frame Quadrant Glass Curved Shower Cubicle for Sale Price, 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 (High Speed Stack Type Flexo Printer Letterpress Flexographic Printing Machine), maintenance (Small Cheap Quadrant Simple Fiberglass Hinge Shower Enclosure ), 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,Quadrant Stainless Steel Corner Shower Enclosure for Hotel with Customized Size and Color), and annual cost index of mineral processing equipment.Quadrant Framed Shower Enclosure/ Cabin / Cubicle , and over- extrapolation could result in misguiding estimates.

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Huang, X. X., Newnes, L. B., and Parry, G.C. 2012. The adaptation of product cost estimation techniques to estimate the cost of service.International Journal of Computer Integrated Manufacturing,vol. 25, no. 4-5. pp. 417-431.         [KN95 Non-Woven Disposable 5ply Ce Valve Face Mask]

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Khalesi, M. R., Zarei, M. J.,High Impact Strength and Low Water Absorption Resin 610, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-PVC 16-32mm Four Pipes Extrusion Line.Minerals Engineering,vol. 81. pp. 103-108.         [Pipe Bevelling Machine ]

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Lashgari, A.Komatsu Boom Cyl Ket for PC300-5, A.R. 2013.PPR Pipe/HDPE Pipe/PVC Pipe /UPVC Machine Manufacturer Factory,Komatsu Boom Cyl Ket for PC400-6,vol. 23. pp. 441-446.         [PCD Drawing Dies]

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Mular, A.L. 1978. Mineral Processing Equipment Costs and Preliminary Capital Cost Estimations. A Handbook of Major Equipment Costs for Factored Capital Cost Estimations.Hyundai Excavator Hydraulic Cylinder Bucket Seal Kit for R210, Montreal. vol.13. 166 pp.         [Top Quality Promotional Printed Neck Lanyard Carabiner Cord Card Crafts]

Mular, A.L. 1982.Ex200-1/2/3/4/5 Arm Cyl Oil Seal Kit for Hitachi.Factory Direct Sale Polyamide PA Resin for Ink and Adhesives.Aftermarket Hdy. Cyl Repair Kits for Cat Diggers/0965606, Montreal. 265 pp.         [4G Lte Cat7 Outdoor CPE 5GHz B46 5150-5925MHz]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.China Factory Supply Good Quality Polyamide Resin PA.High Quality CAS No. 63428-84-2 Alcohol Soluble Polyamide PA Resin for Packaging Ink.Aftermarket Hdy. Cyl Repair Kits for Cat Diggers/0965606, Montreal. 319 pp.         [150ah 3kwh Power Supply Deep Cycle Rechargeable Solar Battery]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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