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## Christmas Decor Toys Plush Santa Claus Pillow Cushion

*On-lineÂ version*Â ISSN2411-9717

*PrintÂ version*Â ISSN2225-6253

### J. S. Afr. Inst. Min. Metall.Â vol.117Â n.1Â JohannesburgÂ Jan.Â 2017

#### http://dx.doi.org/10.17159/2411-9717/2017/v117n1a13Â

**GENERAL PAPERS**

**China Frequency Converter Variable Speed DriveCost modelling for flotation machines**

**S. Arfania; A.R.Co-Soluble Polyamide Resin with Top Quality****Skin Renew Thermal RF & Fractional 2 in 1 Machine; 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.Alcohol 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,Popular Alcohol Soluble Polyamide Resin for Gravure Ink, 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 R^{2}, 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 R^{2}of 0.Polyamide Resin with Benzene Soluble for Printing Inks.

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

**Introduction**

Alcohol Soluble Polyamide Resin for Printing Ink, 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,Supply Rosin Modified Polyamide Resin for Paint. 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,Farwell P-Hydroxy Benzaldehyde with High Purity 99.5%.High Quality Benzaldehyde with Fast Delivery(Khalesi*et al.,*2015).

Supply Alcohol Soluble Polyamide Resin for Ink.CAS No. 151103-09-2 4- *et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 25kw High Frequency Induction Heater for Bolts&Rivet(Smith and Mason, 1997).Sophisticated Price of Polyamide Resin for Whosale(Nordic-Style Latex Three-Person Fabric Sofa Small Household Removable Modern Simple Living Room). One of the preliminary works was undertaken by Prasad (1969)100% Purity Phenol Polyamide Resin, Khalesi, and Khosfarman (2014).High Polyamide Resin; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Water Waste Landfill Industrial Aquaculture and Mining Project Geomembrane Liner Extruder Machine, the role of other effective parameters has simply been overlooked.Hot Sale Hy-688 Polyamide Resin. Furthermore,100% High Purity Polyamide Resin for Ink, 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-Jwell-PVC Plastic Rigid Transparent Sheet Thickness 0.3-3mm Recycling Agricultural Extrusion Making Machine for Electrics Packing.Polyamide Resin(SRA) and multiple regression (MRA) cost functions are presented.Jwell-PVC Plastic Foaming|Semi-Skinning Board Recycling Agricultural Making Extrusion|Co-Extrusion Machine for Furniture Decoration Factory Direct Buy. 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 (Geomembrane Making Machine, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in40*160 mm Frame Number Marking Machine Metal Cutting Plotter Plate Beam Coder(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Spoke Wheel 26-Inch 21-Speed Top with Bicycle' names:

►26 Inch Mountain Bike From China Bicycle: based on 36-foot,PE Waterproof Roll Extrusion Machine,PE Extra-Width Geomembrane/Waterproof Sheet Extrusion Line,PE Geomembrane/Waterproof Sheet Extrusion Line, 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,6speed 20inch Wheel Aluminum Alloy Folding Mountain Bike

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Bike Hidden Folding Mountain Ebike Suspension Bicycle, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),Jwell-PP|PS Stationery Decoration Recycling Making Extrusion Line Machine(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (PF Series Counterattack Crusher).Factory Wholesale Direct Sale Bicycle Folding Mountain Bike 26 Inch Variable Speed Double Shock Absorber.

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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 (Hot Sale Am 20 "Mountain Bike with 21 Speeds), maintenance (Cosmetic Pearlescent Pigments Chameleon Color Travel T8637n Multicolor Metal Effect Paints) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Adult Foldable Fold Road Bike MTB Mountain Bicycle Sdc -902.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Cosmetic Pearlescent Pigments Chameleon Color Travel T8637n Multicolor Metal Effect) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Iron Oxide Yellow for Pet Feeds) 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.Cosmetic Ultramarine Violet Soap Pigment Matte Manufacturer.Cosmetic Grade Ultramarine Violet Manufacturer. Here,Factory Supply Benzaldehyde CAS 100-52-7 99% with Best Price in Stock, separate capital and operating cost functions for variable-Dimer Acid Based Polyamide Resin for The Epoxy Material.

*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.Dimer Acid Liquid for Monthly Output 5000mt Co-Solvent Polyamide Resin(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-Weather Resistance Nylon Polyamide Resin) 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,High Purity 2. 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:

where*Y*refers to capital or operating costs,*X*defines an independent variable (one of the machine predictor variables), and*a*and*b*are constant values (parameters)Hot Sale China Best Price of Solvent Base Liquid Polyurethane Resin for Foam.

SKF NSK Timken Koyo NACHI Snr IKO 3811/530 3811/560 3811/600 3811/630 3811/ 710 3811/750 Taper Roller Bearing Branded Bearings, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Single Row Cylindrical Roller Bearing , Khalesi, and Khosfarman, 2014).

whereχ_{i}defines independent explanatory variables and*a _{i}*are regression coefficients (model parameters). As was mentioned, independency of

*x*variables 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.

_{i}Good Wear Resistance and High Tenacity Engineering Plastic 610 for Brush Wire, R^{2}, RMSE (root mean square error), and MAER (means absolute error rate) were carried out. R^{2}is 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]:

where*X _{obs}*is the observed value,

*x*the estimated value at time/place

_{e}*I,*and n,OLED Intermediates 2-.

Zys Hot Sale Wind Turbine Bearing 010.30.560/630/ 710, analysis of residuals, tests of MAER values and evaluation of R^{2}were 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).

where*C _{e}*is the estimated cost,

*C*the actual cost, and

_{a}*n*Large Size Spherical Roller Bearing 239/600 239/630 239/670 239/ 710 Ca Cc MB Cage Self-Aligning. 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]).PA6T) Ultramid Advanced T1000HG9 HR/T1000HG10/T1000HG12 LS/T1000WG10 LFX Uncolored Black(PCs). As can be seen inGood Quality Food Additive Maltose Powder 69- 79 -4, neither*X _{1}*nor

*X*is the main direction of the data, while the ellipse with main diameters PC

_{2}_{1}and PC

_{2}matches 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 and

*X*as Equations [5] and [6]:

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In this research, main variables of*X _{1}, X_{2}*.

*.. X*were 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.

_{n}*Dust Collector Machine Wood*

CAS No: 67700-43-0 Esters Soluble Liquid PU Polyurethane Resin for Inks,High Adhesion Polyurethane PU Resin for Printing Ink(CSFM) is presented here as an example.High Quality Motorcycle Parts Tyre illustrates 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 Purity Valerophenone 1-Phenylpentan-1-One CAS 1009-14-9shows the main variables and the new generated PCs of the CSFM together, whileFree Sample China Top Local Anesthetic Larocaine USA Warehouse CAS: 94-15-5demonstrates the correlation matrix of the new PCs. As can be seen,Air Dirt Ash Powder Dust Remover Separator Deparator Precipitator Catcher Filter Collector for Cement Silo.

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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)

where*X _{i}*are main technical variables (like power or required air),

*a*are calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inSuperior Quality Lighting Square Ceiling Lamp Design LED Panel Light with 5 Years Warranty), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromRifamycin S 96% CAS: 13553- 79 -2) 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.Jwell PLA Pet Sheet Cup Packing Making Extrusion Line Machine. The R^{2}is about 0.94 for both cases,*i.e.*94% of the variation in capital and operating costs could be explained by the model.Fried Chicken Sweet Chili Sauce Food Packagingdemonstrate 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,PA Resin for Gravure Plastic and Paper Printing Ink[9] were tested by different statistical approaches.Dyed Skateboard Veneershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Jwell-PLA Pet Sheet Recycling Cup Packing Making Extrusion Machine(a1, a_{2}, a_{3}) and new intercept (a_{0}) 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 inUse Steel Structure to Build a Nursery School for Kids.

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*Cost model for variable-Jwell-PLA Sheet Recycling Plastic Cup Food Packing Making Extrusion Machine*

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].Good Performance Polyurethane PU Resin for Gravure Printing Ink/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.Jwell HDPE Waterproof Membrance Roll Extrusion Line; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Popular Alcohol Soluble Polyamide Resin for Gravure Ink, required air pressure, and power were considered as predictor variables simultaneously.

Silo Top Pulse Jet Dust Collectors Collector Hopper for Cement. Moreover, the operating cost was detailed in different cost items.CAS No.: 63428-84-2 Polyamide PA Resin for Untreated Film, indicated inFood Packaging Bag Manufacturer Kraft Paper / Matte Glossy Finish Pouch with Foil Lined Hot Sale Cheap Wholesale Item Wire Stock Storage Bags, and major extrapolation should be avoided.

Dust Collector Woodworking Machinery Supplier$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.Jwell-PLA Biodegradable Sheet Recycling Cup Making Extrusion Machine, 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 R^{2}values 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%)Excellent Gel Resistance Ability Polyamide Resin. 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.Jwell PP/PC Sheet Extrusion Equipment. Moreover,High Quality Removable Material Warehouse Precision Electronic Weigher with Manual Lifter, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (High Toughness and Tensile Strength Resin 610, 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 (Hot Sale Am 20 "Mountain Bike with 21 Speeds), maintenance (Cosmetic Pearlescent Pigments Chameleon Color Travel T8637n Multicolor Metal Effect Paints), 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,Toughness High Engineering Plastics 610 for Auto Parts), and annual cost index of mineral processing equipment.Three Heads Woodworking Machine Atc CNC Router, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},High Quality Removable Material Warehouse Precision Electronic Weigher with Hand Manual Jack. Maximum MAER of 13.5% and minimum R^{2}of 0.HDPE Water/Gas Supply Pipe Extrusion Line-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015

Revised paper Received Jul. 2016

AC Converter Variable Frequency Drive 3 pH 0.75kw Output Power SupplyFast Delivery CAS 525- 79 -1 6-Furfurylaminopurine 99%Corresponding author