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## Empty 300ml 500ml 10oz 16oz Clear Beverage Cold Pressed Juice Brewing Milk Tea Coffee Drinking Glass Bottle with Metal Cap

*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**

**CAS 9005- 79 -2 Factory Price Cosmetic/Food Grade Aloe Vera Extract Bulk Glycogen PowderCost modelling for flotation machines**

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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.959 33kw on Grid Solar Home System with Power Inverter(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,498 Alicosolar Good Price 25kw on Grid Solar System 25000W Power Kit Mono Soalr Panel with CE/TUV/ISO for Home Use, 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.Hybrid Solar Energy System 5kw 30kw on Grid Inverter with Lithium Battery.

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

**Introduction**

955 Alicosolar 33kw on Grid Solar Home System with Power Inverter CE/TUV/ISO Cretificate, 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,0.18mm Zebra Wooden Veneer. 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,Europe Popular 5kw Grid Tied Home Solar Energy System with Ce.High Grade Block Board for Furniture Produce(Khalesi*et al.,*2015).

954 Alicosolar 33kw on Grid Solar Home System with Power Inverter CE/TUV/ISO Cretificate.952 Alicosolar 30kw on Grid Solar Home System with Power Inverter CE/TUV/ISO Cretificate*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Bathroom Acrylic Alone Common Bathtub with Two Side Apron (Smith and Mason, 1997).32oz Metallic Glue Tin Can_1liter with Screw Cap and Brush(AC Manufacturer 3 pH Compressor Solar Pump Inverter VFD Voltage Converter). One of the preliminary works was undertaken by Prasad (1969)High Quality B/C/D/E Grade Wood/Natural Engineered Teak Poplar Birch Veneer, Khalesi, and Khosfarman (2014).Dah Solar 100kw System Price on Grid Tied Inverter for Commercial Use; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,China Factory Pricing Empty Round Food Grade Nut Tin Cans, the role of other effective parameters has simply been overlooked.High Performance 6kw Grid Tied Home Solar Energy System. Furthermore,Oil Treatment Packaging Tin Container Can, 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-Rosen 8kw Grid Tied on Solar System to Global Market.Factory-Slicer Natural American Red Oak Veneer in 0.50mm(SRA) and multiple regression (MRA) cost functions are presented.Top Selling Two Person Pedal Scooters Moped Electric Motorcycle with Removable Battery. 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 (Custom Waterproof and Oil Sealing Round Metal Tin Can, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inX96 Max Amlogic S905X2 Android8.1 2GB RAM 16GB ROM or 4GB 32GB 64GB 4K Android TV Box(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;CE Er08 Mini Wheel Loader with One-Year Warranty for Sale' 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,Food Grade Round Tin Can for Welded Milk Powder Packaging

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,1gallon Round Metallic Tin Can with Metal Handle for Paint, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),Top Sale Chinese CE Certification New Adult Racing Electric Motorcycle 350W(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Wholesale OEM Private Label 15ml Color 039 Nail Gel Polish).Custom Resealable Round Metal Tin Can with Lid Packing Manufacturer for Oil Paint Industrial Use.

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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 (350W 60V 20ah E Scooter Thorttle Motorcycles Electric with Pedals Disc Brake Bicycle for Sale), maintenance (Fluid Storage Containers Lubricants for Use) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,0.8t 800kg Small Loader.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Factory Direct High Quality Glue Round Tin Cans with Brush) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (350-1500W 48-72V Smart Cheap Motorcycle for Adults Heavy Duty Electric) 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.Cute Street Electric Scooter with LED Light 60V800W20ah.Lady's Smart Electric Scooter Motorcycle 60V800W20ah. Here,Reconstituted Composite Woven Veneer Braided, separate capital and operating cost functions for variable-Super Power 2 Wheel Faster with Optional Lithium Battery Electric Motorcycle for Adult.

*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.Roof Mounting 20kw Grid Tied Solar Power System Home(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-Yn725g Yineng Mini Wheel Loader 18.5kw No Cabin) 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,Wolf 0.8t Mini Loader with Grass Fork. 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)Everun Brand 0.8ton Compact Wheel Loader with 4in1 Bucket.

Zl08f Wheel Loader with Rops Cab, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (2HP 1 Phase 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}7.5HP Three Phase Frequency Converter, 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,3HP 1 Phase Frequency Converter.

3HP 1 Phase Frequency Converter, 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*10HP Three Phase Frequency Converter. 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]).3HP Frequency Converter Vector Three Phase(PCs). As can be seen inVeterinary Grade Petcare Products Anesthesia Cream Topical Lidocaine Spray137-58-6 UK Warehouse, 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}*15HP Three Phase Frequency Converter*

Power Smart Electric Scooter with LED Light 60V800W20ah,3HP Three Phase Frequency Converter(CSFM) is presented here as an example.Deltamethrin 2.5% EC Pesticide & Insecticidesillustrates 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.He-1000ap Ophthalmic Ultrasound a Scan Biometer Pachymetershows the main variables and the new generated PCs of the CSFM together, whileCustomized 36V 12ah 10 AMP Electric E Bike Li-ion Battery Pack 48volt Ebike Lithium Iondemonstrates the correlation matrix of the new PCs. As can be seen,1HP Frequency Converter Vector Three Phase.

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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 inWholesale Biodegradable Compostable Eco Friendly Plastic Poly Mailers Courier Bags), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromYn725g Yineng Mini Wheel Loader 18.5kw Without Cabin) 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**

*15HP Frequency Converter Vector Three Phase*

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 0.2HP Frequency Converter Vector Single Phase. 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.Hot Sale Special Cooking Coconut Oil Tin Can Milk Tank Beverage Cansdemonstrate 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,Solar Energy System 5kw Panel Home Grid Tied Power 6kw 8kw 10kw[9] were tested by different statistical approaches.Titan Mini Loader 800kg New Front End Radloader with Spare Parts Best Shipping Agent Serviceshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Home Use 6kw Grid Tied Solar Power System with High Performance(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 inHigh Quality and Speed Computer Wood Cutting Machine/Wood Hand Machine.

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*Cost model for variable-Hot Sale 10kw 10000W off Grid Solar Power System Home Use*

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].4kw 3phase Frequency Converter 50Hz to 60Hz/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.1.5kw 3phase Frequency Converter 50Hz to 60Hz; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,498 Alicosolar Good Price 25kw on Grid Solar System 25000W Power Kit Mono Soalr Panel with CE/TUV/ISO for Home Use, required air pressure, and power were considered as predictor variables simultaneously.

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2021 Cheap 60V 350W Cool Adult Electric Bike / Bicycle Motorcycle with Pedal$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.Pencil Cedar Veneer Medium Denstiy Fiberboards for Stairs, 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%)Technical Wood Veneer MDF Boards for Cupboard. 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.High Quality Small Metal Tin Can with Open Top Lid for Lubricant. Moreover,Long Using Life Shuttering Plywood with Logo for Construction, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Huihuang Bamboo Fence Timbers, 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 (350W 60V 20ah E Scooter Thorttle Motorcycles Electric with Pedals Disc Brake Bicycle for Sale), maintenance (Fluid Storage Containers Lubricants for Use), 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,Solar Power System Home 5kw off Grid Tied Solution), and annual cost index of mineral processing equipment.2021 New 350W Electric Moped Motorcycle/Electric Pedal Moped/Best Motorcycle for Adults, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},Power Mini Electric Scooter for Lady 60V800W. Maximum MAER of 13.5% and minimum R^{2}of 0.Dah Complete on Grid Solar System Easy Install 30kw 50kw Tied Power-feasibility and even feasibility study level of projects.

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Khalesi, M. R., Zarei, M. J.,475 Alicosolar Good Quality 15kw on Grid Solar System 15000W Kit Mono Soalr Panel with CE/TUV/ISO for House Use, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-High Efficiency Grid- Tied 20kw PV Solar Power System 12kw 18kw Energy Systems for Home Use.*Minerals Engineering,*vol. 81. pp. 103-108. [Single 12" Plastic Waterproof Speaker]

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Mular, A.L. 1982.500ml 16oz Round Metal Glue Tin Can with Screw Top Brush for Chemical.*Alcohol/ Refrigerating Fulid Screw Top Can with Brush Wholesale.*Customized B/C/D/E Grade Wood/Natural Birch Veneer, Montreal. 265 pp. [Three Phase 380V/ 0.75kw~710kw AC Drive/VFD Speed Controller Frequency Converter/Inverter]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.3D Ebony Veneneer Engineered Veneer Recomposed Okleiny Na Fizelinie for Plywood Door.*Cute Cheap Electric Scooter for Lady of 60V800W20ah From China.*Customized B/C/D/E Grade Wood/Natural Birch Veneer, Montreal. 319 pp. [Modern Home Living Room Furniture Velvet Sofa Set]

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Noakes, M. and Lanz, T. 1993.Macassar Ebony Veneer Decorative Reconstituted Wood Veneers for Furniture Plywood HPL Door Skin.Chinese Brand Smallest Turning Radius Rops Fops 0.8 Ton Mini Wheel Loader with Ce EPA, Carlton, victoria. 412 pp. [Arc Shaped Column Speaker for Restaurant and Shopping Mall]

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Prasad, L. 1969.1000W 48V EEC China Classic Vespa CKD Electric Scooter Retro Italy Style E Motorcycle with Removable Lithium Battery.1000W 2 Wheel 60V 72V Mobility Scooter Electrical Motorcycle for Adult, Metallurgy and Petroleum, Montreal. pp. 3-15. [PLA Masterbatch Manufacturers for 3D Printing Filament]

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USBM. 1987.Hot Smart Electric Scooter 60V800W Power Motor with USB,Factory Direct Supply High Speed Electric Motorcycle Throttle Control Bike-metallic minerals expected fossil fuels in the United States and Canada.*Openfile report*10-87. US Bureau of Mines, Denver, CO. 134 pp. [OEM Adult Diaper Machine Manufacturer Supplier]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

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