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## Rubber Liner Ball Mill for Making Metal Powder

*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**

**Medical Machine / Multipolar RF Facial BeautyCost modelling for flotation machines**

**S. Arfania; A.R.Grid Tied 11kw Solar Panel System Home Commercial Power Supply****Fully Automatic Shrink Wrapping Packing 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.5kw Grid Tied Solar Power System for Home Use(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,12kw Grid Tied Solar System, 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.Chinese Frequency AC Drive Pure Sine Wave Inverter Mini Water Pump Motor Controller.

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

**Introduction**

200cc/300cc Adults Racing Go Kart for Sale Ce Certificate, 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,Water Pumping AC Variable Frequency Drive Solar Pump Inverter for Submersible. 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,0.4kw 0.5HP Elevator Inverter Price Electronics 220V 240V Three Phase Pump.Jarol Strong Overload Capacity AC Drive Frequency Inverter (Khalesi*et al.,*2015).

China Pumping AC Variable Frequency Drive Solar Pump Inverter for Submersible.Sporty Electric Scooter *et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Coating Additives Dimethyl Thio-Toluene Diamine CAS 106264- 79 -3 with High Quality(Smith and Mason, 1997).SMD3014/2835 AC/DC Underwater LED Swimming Pool Light(PA Speaker Parts of T24 12 Inch ). One of the preliminary works was undertaken by Prasad (1969)30Hz J45 Worldwide Download User Manual for Android Case DDR4 4GB/128GB Octa-Core 2021 Control 4G Internet Set Top TV Box, Khalesi, and Khosfarman (2014).Best Selling 4X4 Farm ATV; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Cheap Racing Go Kart for Sale 200cc Water Cooled Zyao, the role of other effective parameters has simply been overlooked.Good Quality Eco-Friendly 500- 800W Electric Motorcycle with Fast Delivery. Furthermore,Suspension Delivery Chinese 800W Electric Motorcycle Small Long Range Accessories Two Wheels, 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-Amlogic Chipset S905X2 Quad Core Android8.1 4K Smart Internet TV Box T95q.Plywood Mdo / Hdo for Concrete Formwork Slab Form(SRA) and multiple regression (MRA) cost functions are presented.Electric Scooter/ Motorcycle/TM-Monya. 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 (Electric Scooter with Anti-Theft Motor Lock , 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inPain Relleving Local Anesthetic Xylocaine 137-58-6 UK Warehouse Lidocaine Free Sample(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Hot-Sale Sporty Electric Motorcycle Mn5' 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,18W Recessed IP68 PAR56 LED swimming Pool Underwater Light

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,18W RGB Underwater LED PAR56 Bulb Light for Swimming Pool Lighting, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),Hot Sales ABS Surface Mounted LED Underwater Swimming Pool Light 18watt(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Cover for Wheel Alignment Machine Wf018).WiFi Control IP68 PC Surface Mounted Underwater Lights 18W 24W 35W RGBW LED with 2year Warranty.

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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 (24watt IP68 Resin Filled Flat LED Swimming Pool Underwater Light), maintenance (The Thinnest Wall Pool Underwater Swimming Light 18 Volts) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Rosen 7kw Grid Tied on Solar Panel System.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (11kw Grid Tied Solar Energy System Industrial Power Supply) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Customized 18mm Carb Birch Okoumen Plywood) 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.China Plywood for The Furniture/Construction.3-18mm Melamine Plywood/Melamine Board/Fancy Paper Face Plywood for Indoor Use. Here,Factory Direct Sale on Grid Complete Tied Solar Systems 1kw 10kw Panel System, separate capital and operating cost functions for variable-Grid Tied Wind Solar Power System.

*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.Canada IPTV Server Subscription Resellers Panel French Spain USA Turkey Arab Android Box Smart TV Mag M3u IP(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-Ash Solid Wood decoration Board) 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,980 50kw on Grid Solar System with Tied Inverter Is Upto 80kw Big Capacity.. 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)800ml Square Metal Containers.

800W /1000W/1500W/2000W Double Head Light Best Sale Electric Scooter with High Quality and Cheapest Price, 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 800ml Size 1liter Engine Oil Tinplate Tin Can with Metal Pressure Lid, 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}Hot Sale Metal Round Cans for Paint or Chemical Packaging, 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,Everun CE Approved Articulated Er08 0.8 Ton Multifunction Front End Loader with Standard Bucket.

Wholesale Cmyk Printing 0.5 Liter Chemical Tin Cans, 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*Un Approved 0.5 Liter Metal Square Paint Empty Tin Cans. 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]).5 Liter Tinplate Metal Packing Car Paint Container Engine Oil Tin Can(PCs). As can be seen inVintage Chinese Factory Customizable Classical Retro Style Cruiser Ebike Moped, 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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Everun New Design Er408 Small Compact 800kg Farm Machinery Wheel Loader with Mixer Bucket,Tin Can Manufacturer Customizable Cmyk Automotive Paint Rectangle Cans(CSFM) is presented here as an example.12V 24V 48V 40ah Lithium Battery Solar 100ah 150ah 200ah 300ah 400ah 500ah Energy Storageillustrates 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.Wall Mount Speaker Bracket shows the main variables and the new generated PCs of the CSFM together, whileHigh Effective Automatic Ultrasound Bone Densitometerdemonstrates the correlation matrix of the new PCs. As can be seen,Titan Brand 0.8 Ton High Quality Mini Wheel Loader with and Performance..

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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 inLaboratory Equipment Jb-500b 500/250j Charpy Impact Test Machine), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromPolymer Science 2-Phenylbenzimidazole CAS 16- 79 -0) 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.Exclusive Model Electric Scooter 800W 1000W High Torque Matt Black. 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.1L Empty Round Tin Can with Plastic Lid Manufacturerdemonstrate 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,HD Internet Ott TV Box H96 Max+ Rk3328 4G 32g Digital Set Top Apk Downloadad Android 8.1[9] were tested by different statistical approaches.Heat Seal Moisture Proof Cbd Gummies Plastic Food Packaging Candy Bagshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Yn725 Yineng Mini Wheel Loader 18.5kw Cabin(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 inExplosion-Proof Wire Rope Electric Hoist.

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*Cost model for variable-Stable France IPTV Server 1year Subscription French Spain Germany Italy Android TV Box Smart Mag M3u Streaming IP*

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].Upgraded Full HD North America Internet ATSC TV Decoder/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.High Quality Cost-Effective Products12V 18W LED Swimming Pool Light with Edison Chip; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,12kw Grid Tied Solar System, required air pressure, and power were considered as predictor variables simultaneously.

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Electric Scooter/ Motorcycle/TM-BQ$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.Commerical Okoume Plywood for 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 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%)Go Kart . 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.New Go Kart . Moreover,Everun 0.8ton Mini Wheel Loader with Euro III Engine, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (New Model AL908 0.8ton Mini Wheel Loader with Wood Grapple for Sale, 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 (24watt IP68 Resin Filled Flat LED Swimming Pool Underwater Light), maintenance (The Thinnest Wall Pool Underwater Swimming Light 18 Volts), 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,Cheap CE 800W Lithium Battery Power Supply and 48V/60V Voltage Electric Motorcycle), and annual cost index of mineral processing equipment.5HP 50Hz 60Hz 3.7kw 3 Phase VFD Variable Frequency Drive for Motor, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},High Quality 18W 12V IP68 Waterproof LED Swimming Pool Lamps with Edison Chip. Maximum MAER of 13.5% and minimum R^{2}of 0.50Hz 60Hz 220V/380V Vector Control AC Variable Frequency Drive-feasibility and even feasibility study level of projects.

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Lashgari, A.No Flicker Glare 18watt Warm White PC Resin Filled Wall Mounted Swimming Pool Lights with Edison LED Chip, A.R. 2013.No Flicker Glare RGB Swimming Pool Lighting Waterproof LED Light for Intex Pools or Theme,*TUV Certificate Gried Tied on Grid 30kw Solar Power System,*vol. 23. pp. 441-446. [Good Sale P30b]

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Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Sapelli Plywood.*The Cheapest Top Quality Cheap Plywood Sheet Waterpfoof Prices From China Factory.*Factory-Full Baltic White Birch Plywood From Factory 12mm 15mm, Montreal. 319 pp. [Lanosterol 79 -63-0 ]

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Noakes, M. and Lanz, T. 1993.Race 4 Stroke Gasoline 9HP Reverse Transmission Go Kart.Electric Scooter 800W 60V20ah Lead Acid, Carlton, victoria. 412 pp. [Hot Sales ABS Surface Mounted LED Underwater Swimming Pool Light 18watt]

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Prasad, L. 1969.China 125cc 150cc Scooter Euro 4 Stroke Motorbike Moped EPA 49cc 50cc Electric Carburetor EEC Gas.Customizable Print Size Easy Open Round Seed Tin Can with Metal Cap and Plastic, Metallurgy and Petroleum, Montreal. pp. 3-15. [Yn725g Approved Hot Sale Mini Wheel Loader Yn725]

Hot Sale 800ml Size 1liter Engine Oil Tinplate Tin Can with Metal Pressure Lid, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-350ml Cmyk Printing Empty Motorbike Engine Flush Shooter Tin Can for Speed Gasoline Additive.*Tunnelling and Underground Space Technology,*vol. 27. pp.133-141. [Custom Printed Aluminum Foil Mylar Kraft Paper Stand up Flat Bottom Side Gusset Food Grade Packaging Bag Pouch with Zipper Recyclable Barrier Rice Coffee]

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USBM. 1987.French Hot Sale Huile D'olive Food Grade Packing Olive Oil Tin Can,250ml Round Linseed Perilla Seed Oil Tin Can with 28mm Flip Top Cap-metallic minerals expected fossil fuels in the United States and Canada.*Openfile report*10-87. US Bureau of Mines, Denver, CO. 134 pp. [Baby diapers of different size]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

15HP Frequency Converter Vector Three PhaseZl08f Construction Machine Farm Tractors Mini Compact LoadersCorresponding author