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## CNC Low Price Fiber Laser Cutting Machine for Metal Sheet

*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**

**Red Oak Veneered MDF for Interior Design and RenovationsCost modelling for flotation machines**

**S. Arfania; A.R.0.15mm-1.0mm Okume/ Bintangor/ Sapelli Natural Veneer From Linyi Orikey Wood****3 pH 90kw Supply Motor Speed Controller Power Inverter Diving Compressor; 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.Special Design Braided Veneer with Red Walnut(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,Natural Wood Bintangor Face Veneer for Door and Furniture, 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.Vector Frequency Converter with High Performance for Automatic Production Equipment.

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

**Introduction**

Natural Horizontal Bamboo Veneer for Panel Board, 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,Frequency Converter with SVC and Vf Control 380V 50/60Hz. 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,Electric Motorcycle .High-Performance Frequency Converter Three Phase 380V 50/60Hz(Khalesi*et al.,*2015).

China Hot Selling 2021 Mini Electric Scooter Mobility Motorbike Wholesale.Electric Motorcycle *et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Frequency Inverter/Electrical Converter/Inversor/Power Inverter/Variable Speed Controller(Smith and Mason, 1997).Electric Motorcycle (K10 K20 P30 Tungsten Carbide Plate Strips for Cutting). One of the preliminary works was undertaken by Prasad (1969)Electric Motorcycle, Khalesi, and Khosfarman (2014).Electric Motorcycle ; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,750ml Metal Tin Can Container for Chili Oil Canning, the role of other effective parameters has simply been overlooked.Hot Sale Food Packaging Tin Can for Cooking Oil with Plastic Lids. Furthermore,Metal Engine Oil Can Recycling Lubricant Tin Packaging Container, 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-2L Galvanized Tin Cans for Cooking Oil with Plastic Lids.Electric Motorcycles (SRA) and multiple regression (MRA) cost functions are presented.Made in China Solar System 10kw 20kw 30kw 40kw 50kw Energy for Industry. 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 (Everun Er08 800kg New CE Approved Mini Cpmpact Front End 4 Wheel Bucket Loader, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inSuper 20MHz RF Beauty Machine(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;800W Aluminium Alloy Wheel Hubs Sport Electric Motorcycle' names:

►Zl08 Chargeuse Wheel Loader: based on 36-foot,Professional Manufacturer Everun Er08 CE Approved Mini Cpmpact Front End 4 Wheel Bucket Loader,500W EEC Electric scooter,Electric Motorcycle , 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,Solar Electric Motorcycle

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Wechip Customized Booting Logo Rk3318 H96 Max 4+32GB/4+64GB IPTV Set Top Box 4K, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),OEM 1500W EEC Electric Scooter (CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Hot-Sale High Precision Tungsten Carbide Wire Guide Dies).New Arrival 4K Smart S905X2 TV Box 4+64GB X96 Mini.

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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 (0.25mm Natural Wood Face Veneer), maintenance (2L Empty Tin Container for Engine Oil Lubricant) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,High-Performance Three Phase Frequency Converter 380V 50/60Hz.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Electric Motorcycle ) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (EEC Electric Scooter ) 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.800w /1100w EEC Electric Scooter .Factory Produce Natural Face Veneer Size 1220X1830X0.25mm. Here,Electric Motorcycle/Scooter/Bike , separate capital and operating cost functions for variable-800W EEC Electric Motorcycle.

*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.No Foldable 40-60km Range Per Charge EEC Electric Scooter(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-1 Wheel Electric Motorcycle/One Scooter) 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-Performance Frequency Converter/AC Drive 380V 50/60Hz. 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)Three Phase 380V Small Frequency Converter.

Hot Sale High Performance Vector Frequency Converter 380V 45/55kw, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Single/Three Phase 220V 380V Vector Control Frequency Converter, 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}Factory-Enginneered Veneer Ash in 0.30mm, 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,Small Frequency Inverter 380V 50/60Hz.

China Single Phase Variable Frequency Inverter 1.5kw, 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*1.2mm White Poplar Veneer From Factory for Exporting. 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]).Grid Tied Solar Panel Energy System for Home Power Generation 7kw 8kw 9kw(PCs). As can be seen inTitan Chargeuses Cheap Small Log China Mini Digger Loader with European Quick Hitch, 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}*Eucalyptus Core or Birch for Veneer with Grade AA*

Wholesale 1.5 mm Natural Bamboo Skateboard Veneer with Best Price,Popular 800W Power Electric Scooter(CSFM) is presented here as an example.Zl08f Wheel Loader with Rops Cabillustrates 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.300/650ml/ 1L Plastic Shampoo Cosmetic Pump Bottleshows the main variables and the new generated PCs of the CSFM together, whilePowersoft Professional Line Array Active Subwoofer Column System DSP PRO Audio Speaker PA Ml15SAdemonstrates the correlation matrix of the new PCs. As can be seen,1250X2500mm Rotary Cut Okoume Veneer Cheap Prices.

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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 inRubber Accelerator Pre-Dispersed Masterbatch Tmtd-80), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found from20MHz Skin Rejuvenation Vacuum RF Lifting Machine) 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**

*Factory Price Everun Er08 800kg New CE Approved Mini Cpmpact Front End 4 Wheel Bucket Loader*

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 0.2862 Easy Installation 5kw 6kw 8kw 10kw 12kw on Grid Solar System. 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.Super Duplex Stainless Steel Bar by Zeron100 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,Eougem CE 1.0 Ton Hydraulic Mini Radlader Zl08[9] were tested by different statistical approaches.Diesel Engine Used for Silent Generator Set with Multy-Cylindershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Wolf 0.8t 800kg Mini Loader with Euro 3 Engine(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 inSemi-Finishing and Finishing 100% Raw Materials Tungsten Carbide Wire Guide Dies & Moulds.

AC to Drive 380V Frequency Inverter 4kw

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*Cost model for variable-500- 800W 48V 20ah OEM manufacturers Electric Scooter*

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].800W Brushless Adult Electric Scooter/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.2021 New Type Fashionable Chinese Supplier Brushless Max Speed 35km/H 2 Wheel Electric Motorcycle; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Natural Wood Bintangor Face Veneer for Door and Furniture, required air pressure, and power were considered as predictor variables simultaneously.

Best Chinese Big Wheel Electric Motorcycle Racing Bike Adult Bicycle. Moreover, the operating cost was detailed in different cost items.Bd600 AC Frequency Inverter/Converter/220 V to 380 Inverter, indicated in1220*2440*18mm Birch Plywood with Carb P2 Standard Quality, and major extrapolation should be avoided.

1L Beer Can$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.High Quality Electric Scooter Factory, 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%)Cute Electric Scooter Motorcycle with Pedals 60V800W14ah Lithium Battery for Adults. 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.1L Panit Can. Moreover,1L and 5L Can for Antifreezing Liquid, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (2021 Fashionable High Quality with Lithium Battery Electric Scooters EEC Vespa Citycoco Newest Model Motorcycle, 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 (0.25mm Natural Wood Face Veneer), maintenance (2L Empty Tin Container for Engine Oil Lubricant), 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,Pump Inverter Variable Frequency Drive Manufacturers AC Supplier), and annual cost index of mineral processing equipment.Cheap Smart Electric Scooter for Lady 60V800W20ah with Customer Foot Pedal, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},Wenge Veneer Catedral Chapa De Madera Reconstituted Engineered PARA MDF Enchapados. Maximum MAER of 13.5% and minimum R^{2}of 0.China Ebike Velo Electr 500 Watt Electric Motorbikes for Adults in Stock-feasibility and even feasibility study level of projects.

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Lashgari, A.2885 Factory 25 Years Warranty Solar Power Kits 5kw 8kw 10kw 12kw Grid Energy System, A.R. 2013.2876 10kw Home Used Solar Power System on Grid Roof,*2879 Free Shipping 10kw 12kw 15kw Home Used Solar Power System on Grid Roof,*vol. 23. pp. 441-446. [Zd160TF-3 Dozer Machine 160HP Crawler Bulldozer Price]

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Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Small Wheel Loader Wl80 800kg Loaders for Farm Work.*1L Tin Can for Camellia Oil .*Manufacturer of Enigine Oil Can, Montreal. 319 pp. [PE Geomembrane/Waterproof Sheet Extrusion Line]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.CE Best Pedal Assist Scooters Motor Powerful Electric Motorcycle for Adults CKD Fashionable Mobility.*Journal of Manufacturing Science and Engineering,*vol. 128. pp. 563-575. [Mini 220V Single Phase Input 2.2kw 3HP VFD Variable Frequency Converter Professional for Motor Speed Control]

Noakes, M. and Lanz, T. 1993.Mxq 4K PRO Allwinner H3 Quad 7.1 1GB RAM 8GB ROM H. 265 3D Android Media TV Box.2021 Best Sale Fashionable Cheaper High Quality 1000W Adults 2 Wheel Electric Motorcycle, Carlton, victoria. 412 pp. [Good Quality Powder CAS 56377- 79 -8 Nosiheptide with Best Price]

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Prasad, L. 1969.5 Litre Extra Olive Oil Tin Can .DC/AC Frequency Inverter Solar Pump Power 400-600V Input 2.2kw, Metallurgy and Petroleum, Montreal. pp. 3-15. [Diesel Central Drive Three Wheel Dumper for Sale]

Single/Three Phase 220V 380V Vector Control Frequency Converter, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Frequency Converterlow Industrial Power Inverter.*Tunnelling and Underground Space Technology,*vol. 27. pp.133-141. [PA Woofer Speaker T- 10 12 15]

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USBM. 1987.2370 Alicosolar Easily Install 10kw on Grid Solar System 10kVA Kit with CE/TUV/ISO for Home Use,China Electric Moped Motorcycle Sale for Adults Mobility E Scooter with Battery-metallic minerals expected fossil fuels in the United States and Canada.*Openfile report*10-87. US Bureau of Mines, Denver, CO. 134 pp. [Luxury Recyclable 30ml 50ml 100ml Bottles Frosted Glass Perfume Bottle with Pump Spray Cap]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

Heat Sealing Embossed Plastic Vacuum Packaging Bag for Delicatessen4-Chloro-4'-Methylbenzophenone High Quality Products CAS 5395- 79 -9Corresponding author