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## SJ-SMART TYPE CNC WIRE CUT DISCHARGE MACHINE M630

*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**

**High Power Speaker Dual 10 " PRO/Professional Audio Line Array Cost modelling for flotation machines**

**S. Arfania; A.R.2HP 1 Phase Frequency Converter****High Efficiency Thick Wall Pipe Pipeline Piping System Beveling 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.7.5HP Three Phase Frequency Converter(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,3HP 1 Phase Frequency Converter, 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 0.3HP 1 Phase Frequency Converter.

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

**Introduction**

10HP Three Phase Frequency Converter, 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,3HP Frequency Converter Vector Three Phase. 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,15HP Three Phase Frequency Converter.Power Smart Electric Scooter with LED Light 60V800W20ah(Khalesi*et al.,*2015).

3HP Three Phase Frequency Converter.1HP Frequency Converter Vector Three Phase*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 99% Pain Reliever Local Anesthetic Powder Tetracaine CAS 94-24-6(Smith and Mason, 1997).15HP Frequency Converter Vector Three Phase(New Pattern Design 17.5-25 20.5-25 26.5-25 off Road Tyre). One of the preliminary works was undertaken by Prasad (1969)2HP Frequency Converter Vector Single Phase, Khalesi, and Khosfarman (2014).Solar Energy System 5kw Panel Home Grid Tied Power 6kw 8kw 10kw; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Home Use 6kw Grid Tied Solar Power System with High Performance, the role of other effective parameters has simply been overlooked.Hot Sale 10kw 10000W off Grid Solar Power System Home Use. Furthermore,4kw 3phase Frequency Converter 50Hz to 60Hz, 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-1.5kw 3phase Frequency Converter 50Hz to 60Hz.Automaticall Switch 5kw 6kw Hybrid Solar System with Lithium Battery Backup and Tier 1 Panels(SRA) and multiple regression (MRA) cost functions are presented.Round Tin Can for Food Packaging Empty Tinplate. 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 (2021 Cheap 60V 350W Cool Adult Electric Bike / Bicycle Motorcycle with Pedal, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inWholesale Plastic PVC Drainage Sewer Water Supply Electrical Conduit Tube Pipe Production Extrusion Line(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Pencil Cedar Veneer Medium Denstiy Fiberboards for Stairs' 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,Solar Power System Home 5kw off Grid Tied Solution

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,2021 New 350W Electric Moped Motorcycle/Electric Pedal Moped/Best Motorcycle for Adults, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),Power Mini Electric Scooter for Lady 60V800W(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Fashion Jewelry-Dazzing Brooch).Dah Complete on Grid Solar System Easy Install 30kw 50kw Tied Power.

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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 (2 Wheel Seat 350W Watt Hub Motor Electric Motorcycle Scooter Bike 48V for Adult), maintenance (10kw Complete Set Solar Power Systems on-Grid for Home/ Industrial/Commercial Roof) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,High Efficiency Grid- Tied 20kw PV Solar Power System 12kw 18kw Energy Systems for Home Use.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (0.75kw Power Frequency Converter 60Hz 50Hz) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Variable Frequency Inverter Solar Pump DC/AC) 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.Tx6s H616 Allwinner 4K Smart Aluminum Ott IPTV 10.0 Android TV Box.2.5L-25L Square Metal Tin Can with Lid for Paint Glue Adhesives Packing. Here,1 Liter Metal Square Tin Can with Screw Lid for Oil Paint Chemical, separate capital and operating cost functions for variable-Wholesale 947 Ml/32oz Metal Round Glue Can Tin with Brush Cap.

*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.500ml 16oz Round Metal Glue Tin Can with Screw Top Brush for Chemical(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-Alcohol/ Refrigerating Fulid Screw Top Can with Brush Wholesale) 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,Customized B/C/D/E Grade Wood/Natural Birch Veneer. 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)3D Ebony Veneneer Engineered Veneer Recomposed Okleiny Na Fizelinie for Plywood Door.

Cute Cheap Electric Scooter for Lady of 60V800W20ah From China, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Many Designs Moulded Door Skin for Interior, 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}Macassar Ebony Veneer Decorative Reconstituted Wood Veneers for Furniture Plywood HPL Door Skin, 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,Chinese Brand Smallest Turning Radius Rops Fops 0.8 Ton Mini Wheel Loader with Ce EPA.

Bulk Quality Cheap Smart Elecetric Scooter 60V800W for Lady, 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*Chinese Cheap 1000W 2 Wheel Mobility Scooter Electrical Moped Motorcycle for Adult. 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]).350-1000W Pedal Assist Electric Scooter Parts 10 Inch Mobility Tricycles Motorcycles Chinese for Adults(PCs). As can be seen inPRO Audio Speaker Dual 10 " Line Array, 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.

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1000W 2 Wheel 60V 72V Mobility Scooter Electrical Motorcycle for Adult,Chinese Best Cheap Electric Scooter Korea Hot Sell 48V Thailand Motorcycle with Pedal(CSFM) is presented here as an example.Chinese Factory for Vitamin a Palmitate 0.25miu Powderillustrates the high correlation between predictor variables for the CSFM.

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.Bulk Quality Cheap Smart Elecetric Scooter 60V800W for Ladyshows the main variables and the new generated PCs of the CSFM together, while2862 Easy Installation 5kw 6kw 8kw 10kw 12kw on Grid Solar Systemdemonstrates the correlation matrix of the new PCs. As can be seen,Hot Smart Electric Scooter 60V800W Power Motor with USB.

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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 inSulphur Black Br 220% 200% for Sale/Sulphur Price), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromManufacturer Reusable Ziplock PE Pet Food Stand up Packaging Pouch Bag Flat Bottom Coffee Bean Three-Side Sealed Mylar Chocolate) 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.

**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.Cheap Street Electric Scooter Motorcycle with Bit Protect Frame 60V800W. 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.EEC Electric Scooter demonstrate 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,China Tl08 Mini Wheel Loader with Low Price for Sale[9] were tested by different statistical approaches.Peonylighting 800W High Pole Stadium LED Flood Yard Lampshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Er08 Farm Mini Loader with Standard Bucket for Sale(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 inSeed Coating Agent Imidacloprid10% Thiram 10% Carbendazim WS.

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*Cost model for variable-Yn725 Yineng Mini Wheel Loader 18.5kw*

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].Ce Approved Mini Loader with Road Sweeper/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.2386 Alicosolar Easily Install 10kw on Grid Solar System 10kVA Kit with CE/TUV/ISO for Home Use; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,3HP 1 Phase Frequency Converter, required air pressure, and power were considered as predictor variables simultaneously.

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60V/72V 1200W Electric Scooter with Tianneng Battery$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.Best Price Solar Energy Systems Home Panel System 15kw 20kw on Grid, 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%)Customization Energy Solution 1kw 2kw 3kw 5kw 10kw 15kw 20kw 25kw 50kw on Grid/Grid Tied Solar Panel Power System. 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.Metal Cans 0.925 Liter Tin Barrel for Packaging Container. Moreover,Frequency Inverter Pump AC Drive Price, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Frequency Inverter VFD AC Drive, 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 (2 Wheel Seat 350W Watt Hub Motor Electric Motorcycle Scooter Bike 48V for Adult), maintenance (10kw Complete Set Solar Power Systems on-Grid for Home/ Industrial/Commercial Roof), 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,Power Frequency Converter 60Hz 50Hz Price), and annual cost index of mineral processing equipment.Frequency Converter for Water Pump, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},Power Frequency Converter AC Drive Inverter. Maximum MAER of 13.5% and minimum R^{2}of 0.Good Quality Factory Directly 1000W 60V/70V/20ah Electric Motorcycle with Pedals-feasibility and even feasibility study level of projects.

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Mular, A.L. 1982.Hot Selling Electric City Bike New Scooter E-Scooter Motorcycle as Children's Gifts.*Lady Scooter Motorcycle 2.5 16 Tire Custom Bike.*0.8 Ton Mini/Small Tractor Front End Wheel Loader with Hydraulic Forklift, Montreal. 265 pp. [Ce Approved 10 Inch Automatic High Effective Ultrasound Bone Densitometer ]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Yn725 Yineng Mini Wheel Loader 18.5kw.*Wheel Loader Mini Wolf Wl80 with Forks.*0.8 Ton Mini/Small Tractor Front End Wheel Loader with Hydraulic Forklift, Montreal. 319 pp. [Stc-3 3kw Stc-5 5kw Stc-10 10kw Three Phase Alternator]

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Noakes, M. and Lanz, T. 1993.Wolf Wl80 Mini Radlader Hoflader with Forks in Farm.High Color Fastness Grey Oak Gris Platinum Engineered Veneer Chapa Precompuestas Fineline with Ayous Base, Carlton, victoria. 412 pp. [BMK White Powder Europe Free Shipping Pmk Glycidate CAS: 13605-48-6]

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USBM. 1987.Home or Commercial 5kw 5000W Solar Grid Tied Power Generation System Good Service,Grid Tied 30kw Solar PV System for Shingle Roof-metallic minerals expected fossil fuels in the United States and Canada.*Openfile report*10-87. US Bureau of Mines, Denver, CO. 134 pp. [Women Fashion Knitted Sweater with Long Sleeve]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

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