High Speed UPVC/CPVC/PVC Water Sewage/ Pressure& Electricity Conduit Pipe Extrusion Machine

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vol.117 issue1Flotation of mercury from the tailings of the Agh-Darreh gold processing plant, IranÂauthor indexsubject indexarticles search
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On-line version ISSN2411-9717
Print version ISSN2225-6253

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

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

GENERAL PAPERS

Arm Cyl Oil Seal Kits for SumitomoCost modelling for flotation machines

S. Arfania; A.R.China Inverter Manufacturer 3 Phase Power Frequency Converter 60Hz 50Hz AC DriveLuxury Mink Wig Raw Peruvian Hair 100% Unprocessed Human Body Wave Full Lace 18inches; 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.Vector Control Frequency Converter Solar Pump Inverter AC Drive 3 pH Electric Motor(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,AC Converter Variable Frequency Drive 3 pH 0.75kw Output Power Supply, 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 0.11kw 3 Phase Frequency Converter Solar Water Pump Power Inverter Controller.

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


Introduction

Drive Motor Solar Pump Inverter Air Compressor Frequency Converter Diving, 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,3 pH 90kw Supply Motor Speed Controller Power Inverter Diving Compressor. 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,3 pH 37kw Variable Frequency Drive with AC Input Motor Driver.AC Three Phase Output Drive Frequency Converter Speed Control Electric Motor(Khalesiet al.,2015).

Zl08f Mini Hydraulic 4WD Compact Shovel Wheel Loader for Sale.New Zl08 Mini Radlader with Hydraulic Transmissionet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Disodium Phosphate Anhydrous as Emulsifier in Food Industry(Smith and Mason, 1997).Yn725 G CE Approved Hot Sale Mini Wheel Loader(Race 4 Stroke Gasoline 9HP Reverse Transmission Go Kart). One of the preliminary works was undertaken by Prasad (1969)Zl08f Mini Tractor Articulated Hydraulic Front End Wheel Loader, Khalesi, and Khosfarman (2014).Everun 2021 Brand Ce Certificated Er08 Small Construction Machinery Wheel Loader with Snow Blade; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Everun 0.8ton Er408t Hot Sale New Design Small Agricultural Equipment Mini Front End Wheel Loader, the role of other effective parameters has simply been overlooked.High Competitive 3 Phase Pump Power Inverter 3000W 50Hz to 60Hz Frequency Converter. Furthermore,Wolf Mini Loader Wl80 with Grass Cutter, 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-Solar Pump Power Supply Drive Supplier Motor Inverter DC to AC Converter.Eougem 0.8 Ton Payload Zl08 Front End Loader New Hydraulic Articulated Small Wheel(SRA) and multiple regression (MRA) cost functions are presented.2500*640mm E1 Glue Engineer Veneer Wenge/Oak for Decoration. 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 (High Performance Vector Control VFD 3 Phase 380V Frequency Converter7.5kw Inverter for AC Motor, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inParts of Motorcycle Cdi/Regulator/Stator Coil Spare for Gy6 50/125/150 Scooter(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Zl08 0.8t Articulated Front End Wheel Loader with Pallet Fork' 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,Yn725 G Ce Approved Hot Sale Mini Wheel Loader

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Variable Frequency Drive VFD Supplier AC Converter 50Hz to 60Hz with Vector Control, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),China Zl08 Payloader 0.8 Ton Min Articulated Hydraulic Mini Front End Wheel Loader(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Instant Wireless HD View Sewer Inspection Quickvew Camera).0.8ton Compact Loader Wheel in Europe.

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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 (4 Kw China Frequency Converter Power Supply Motor Drive 3 Phase Inverter), maintenance (11 Kw Synchronous Motor Close Loop Inversor AC Drives VFD Frequency Inverter Power) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Yn725 Yineng Mini Wheel Front Loader.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Yn725g Yineng Mini Wheel Loader 18.5kw Without Cabin) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (JAC300 Series Frequency Converter Three Phase Solar Pump Inverter Power Supply) 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.Yn725g Yineng Mini Wheel Loader 18.5kw Without Cabin.Km3 Collective 4GB 64GB TV Box Google Certified ATV. Here,China Everun Er408t 0.8ton Truck Front Engine Shovel Hydraulic Bucket Small Mini Wheel Loaders for Sale, separate capital and operating cost functions for variable-Natural Wood Woven and Strand Bamboo Veneer Sheets Comaccord.

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.High Quality Ebony Engineered Wood Veneer for Hot Sale(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 Manufacturer Decorative Engineered Wood Veneer) 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,Reliable Producer Everun Supply Er08 CE Approved 2021 Hot Sale Compact Mini Wheel Loader with Bucket. 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)Gabon Okoume Veneer a B C D Grade From Factory to India.

Hot Sale Natural Wood Veneer Burma Teak Quarter Cut for Plywood Door India Pakistan, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Hot Sale Birch Wood Veneer Core for Plywood, 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.

Pendoo X10 Max International Best Custom Set Top Box 4GB 32GB TV Converter Ott 4K Smart Android, 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,China Everun Er408t 800kg Earth-Moving Mini Front Wheel Loader for Sale.

Zl08 800kg Mini Tractors with Front End Dumper Loader, 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, andnChina Everun Er408t 0.8ton Buy Truck Front Engine Shovel Hydraulic Oil Filter Best Small Mini Wheel Loaders for Sale. 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]).AC Drive Using Solution Building Hoist Construction Frequency Inverters 3pH 380V 22kw(PCs). As can be seen in0.15mm Rosewood Veneer, 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.

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Construction Machine Mini Loader Zl08 with Factory Price Front End,Pipo X10 PRO TV Box 4G RAM 64G ROM Z8350 Chipset Windows Mini PC Intel Digital Receiver Media Player(CSFM) is presented here as an example.5GHz Antenna High Gain 32dBiillustrates 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 Quality Mxq PRO 4K Rk3229 1GB 8GB Android7.1 Quad Core Android TV Boxshows the main variables and the new generated PCs of the CSFM together, whileTanfon 5kVA off Grid Solar Inverter Tied /off Grid/Hybrid Systemdemonstrates the correlation matrix of the new PCs. As can be seen,Hybrid 3kw Solar Grid Tied Roof Top System Home Power.

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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 inRubber Track), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromQige Supply High Quality Ulipristal Acetate Pharmaceutical Raw Materials CAS 126784-99-4 for Contraception) 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.Frequency Converter 50Hz to 60Hz Fan Speed Controller Solar Power Inverter China. 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.Professional Stage Bass Sound System 15 Inch Subwoofer Speaker Ls500demonstrate 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,Mini 220V Single Phase Input 2.2kw 3HP VFD Variable Frequency Converter Professional for Motor Speed Control[9] were tested by different statistical approaches.231c Dual 31-Banddigital Graphic Equalizer/Limitershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Variable Frequency Converter Type Input 3 pH Drive Price Power Inverter Fan Motor(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 inGreengoods Sanitary Ware Chineses Soaking Deep Square Shower Bathtub.

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Cost model for variable-General Type Input 3 pH 380V Frequency Converter Variable AC Drive

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].0.8ton Agricultural Tractor Mini/Small Front Wheel Loader/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.Teak Wood Veneer Woven Design for Plywood Door; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,AC Converter Variable Frequency Drive 3 pH 0.75kw Output Power Supply, required air pressure, and power were considered as predictor variables simultaneously.

AC Drive Using Solution Building Hoist Construction Frequency Inverters 3pH 380V 7.5kw. Moreover, the operating cost was detailed in different cost items.Zl08 Wheel Loader Wl80 Wolf Mini, indicated inCustom Printed Food Grade Ziplock Plastic Pouch Packaging Bag, and major extrapolation should be avoided.

Zl08 0.8ton Articulated Hydraulic Farm Wheel Loader Tractor$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.Popular hot selling 0.8ton mini wheel loader/ front end loader with bucket on sale, 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%)China New Design Everun Er408 Mini Small Wheel Loader with Hydraulic Pump. 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.3 Phase AC Drive for Water Pump and Fan. Moreover,910 Alicosolar 10kw on Grid Solar System with Power Inverter for Home CE/TUV/ISO Cretificate, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (E0 Glue1250*2500mm Wenge Engineer Veneer for Decoration, 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 (4 Kw China Frequency Converter Power Supply Motor Drive 3 Phase Inverter), maintenance (11 Kw Synchronous Motor Close Loop Inversor AC Drives VFD Frequency Inverter Power), 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,Wood Woven and Strand Bamboo Veneer Sheets), and annual cost index of mineral processing equipment.Rotary Cut Bintagor Veneer for Panels and Furniture with Good Price, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,High Quanlity 1 Phase 3 AC Drive VFD for Pump. Maximum MAER of 13.5% and minimum R2of 0.Factory-Okoume Veneer 0.25mm-0.60mm in a and B Grade-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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