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## Professional China Agent Sea Shipping Service From to Spain /Valencia/Barcelona/Algeciras/Malaga

*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**

**Waterproof Loudspeaker Wall Mounter 15inch Mq-15cpCost modelling for flotation machines**

**S. Arfania; A.R.White Extrusion Granular Ammonium Sulphate China Factory****Whole Sale Hammerhead 150cc Go Kart with Parts; 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.Granular Grade Ammonium Sulphate N20.5% Nitrogen Fertilizer(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,Nitrogen Fertilizer Color Granular Ammonium Sulphate 20.5+24s, 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.China Suppliers Alone Type Wraped Beam Disc Machenism Padlock.

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

**Introduction**

Dust Proof Steel Shackle Padlocks with Master Key, 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,Padlock-G38PDP. 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,Breaker Lock.Padlock(Khalesi*et al.,*2015).

Alone Type Wraped Beam Leaves Iron Padlock .Fuso Truck & Bus Turbo Td04 49377-03041 Me201258 for 4m40 Engine Mitsubishi Pajero*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Crovell Supply Raw Material CAS 104-29-0 Chlorphenesin for Cosmetic(Smith and Mason, 1997).Gt1544s 454083-0001 1002829 Garrett Engine Turbo for Vw Passat(China Wolf Wl80 Articulated Mini Loader). One of the preliminary works was undertaken by Prasad (1969)Engine Parts Turbocharger for Mercedes-Benz Om906 La K27.2 Om366/Om642/Om362/Om441/Om442/Om447/Om457, Khalesi, and Khosfarman (2014).Gt1544sm Tdi Engine Bnm 045253019d 733783-5008s 733783-5007s Turbo; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Universal Turbo T3t4 T04e T3.63 Ar + 76mm 3" Intercooler Pipe Piping Kit, the role of other effective parameters has simply been overlooked.Truck Parts Turbocharger for Mercedes-Benz/Chrysler/Dodge Om647 Gt2256 6470900280 736088-0003. Furthermore,FPM FKM Viton EPDM SBR Cr Silicone NBR Rubber Parts, 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-Gt1541V 704765-0003/708450-0018 Turbine Wheel Shaft for 700960-0011.Gt1544sm 733783-5007s Turbo for Volkswagen Fox 1.4L Tdi Engine Bnm(SRA) and multiple regression (MRA) cost functions are presented.Cosmetic Grade 99% Purity All Trans Retinoic Acid 302- 79 -4 Tretinoin/Vitamin a. 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 (Customized Rubber Spacer Black Silicone Bushing, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inCAS No.: 67-63-0 Isopropyl Alcohol 99.9%/Ipa 99.9%/Isopropanol 99.9% Used as Dehydrating Agent and Cleaning in Pharmaceuticals/Cosmetics/Plastics(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Gym Rubber Flooring Floor Mat Roll' names:

►Ihi Turbocharger 2001-04 Peugeot: based on 36-foot,Gt1749V ,2004-10 for Volkswagen,Borg Warner BV45 Turbo 5303-988-0337 Core Chra for Nissan, 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,T250-04 452055-5004s Turbocharger for Gemini III Engine

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Gtb1749vk Turbo Cartridge 798128-0004 for 2011- Peugeot Boxer, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),Gt3776D 466819-5004s 1823560c92 Turbo for Ford F650 Navistar(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (1000W Metal Pipe Round Tube Fiber Laser Cutting Machine).Gt1749vk 798015-0002 A6710900380 Turbo for Ssang-Yong Korando C200 2.0 D20dtf Engine.

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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 (Gt1544V 740611-5002s 28201-2A400 Turbo for Hyundai Verna), maintenance (Aftermarket BV45 53039880337 Turbocharger for 2010-12 Nissan Pathfinder Navara Engine) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Factory Supply Glycyl-L-Tyrosine.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Dl-Isoleucine Powder CAS 443- 79 -8) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Glycyl- L-Tyrosine; 658- 79 -7) 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.L-Pyroglutamic Acid.Dl-Isoleucine Powder CAS Number 443- 79 -8. Here,98% Uvarigranol B\C\D\E Standard Reference Materials Plant Extracts, separate capital and operating cost functions for variable-Longyu Produce Nano Copper Oxide Nanoparticles 1317-38-0.

*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 Purity 99.0%Min. Ademetionine Disulfate Tosylate (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-Centella Asiatica Extract 99% Asiaticoside 16830-15-2) 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,Crovell Supply Raw Material CAS 104-29-0 Chlorphenesin for Cosmetic. 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)Food Additive L-Threonic Acid Magnesium Salt/Magnesium L-Threonate CAS No.: 778571-57-6.

Polyethylene Green Color Masterbatch, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Pipe Bevelling Machine , 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}ISO Certificated Company Supply Skin Whitening Retinoic Acid Powder, 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,Green Plastic Masterbatch Blowing Film Grade.

Green Color HDPE Masterbatch, 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*Blue Masterbatch for Film. 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]).Yellow Color Plastic Masterbatch(PCs). As can be seen in1L Tin Can for Camellia Oil , 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}*Yellow HDPE Masterbatch*

Universal LPG Gas Completed ECU Conversion Kit,Act Best Seller CNG LPG Gas Car Emulator(CSFM) is presented here as an example.Launch Thinkcar Thinkdiag Full System OBD2 Diagnostic Tool Powerful Than Easydiag with 3 Free Softwareillustrates 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.Roof Mounting 20kw Grid Tied Solar Power System Homeshows the main variables and the new generated PCs of the CSFM together, while38mm 42mm CATV Plug in 0~20dB Hfc Attenuator Paddemonstrates the correlation matrix of the new PCs. As can be seen,CNG/LPG Rail Injector Type Gas 4 Cylinders.

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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 inTebuconazole best-selling hot 430g/L SC), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromCustomized Metal Tea Canister Food Packaging Box Round Can Tin) 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.Fuel Gas Cylinder ECU 2568d Map Sensors. 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.10W 4" Inchs LED Dimmable Downlight for Roomdemonstrate 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,Motorcycle Act 2568d 6cyl 8cyl ECU Conversion Kit[9] were tested by different statistical approaches.Supply China Control Frequency Converter VFD Power Transformer Motor Driveshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Auto Vehicle Gas Conversion Kit CNG Seqential Injection Kits(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 inRectangle Solid Glossy Surface White Freestanding Acrylic Soaking Bathtub.

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*Cost model for variable-Electric Pipe End Bevelling Machine*

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].T-Electric Pipe Bevelling Machine /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.Pneumatic Pipe Beveling Machine High Performence; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Nitrogen Fertilizer Color Granular Ammonium Sulphate 20.5+24s, required air pressure, and power were considered as predictor variables simultaneously.

Act CNG LPG Fuel System 2568cyl ECU Kits. Moreover, the operating cost was detailed in different cost items.Factory Directly Sell Good Performance Virgin Transparent PA12 Granules/Pellets /Polyamide 12 Resin for Oil Cup, indicated inGy6 /Jog Motorcycle Spare Parts Regulator/Rectifier, and major extrapolation should be avoided.

Plastic Green Color Masterbatch$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 0.4 Cyl CNG Auto Gas LPG Conversion Kit / Sequential Injection System, 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%)3cyl 4 Cyl 6cyl 8cyl LPG/CNG Injector Rail. 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.L Auto Gas LPG Conversion Kit / Car 4 Cyl Sequential Injection System. Moreover,High Quality Diesel Engine Parts 4 Cyl Pump Rotor Head 096400-0371, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Diesel Engine Parts Injection System Nozzle Dnopd619, 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 (Gt1544V 740611-5002s 28201-2A400 Turbo for Hyundai Verna), maintenance (Aftermarket BV45 53039880337 Turbocharger for 2010-12 Nissan Pathfinder Navara Engine), 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,Supply API 99%Min Dalbavancin CAS 171500- 79 -1 Raw Material Powder), and annual cost index of mineral processing equipment.Diesel Engine Parts Fuel System Nozzle Dlla145pn574, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},Master Batch Organic Colors. Maximum MAER of 13.5% and minimum R^{2}of 0.Orange Color Masterbatch-feasibility and even feasibility study level of projects.

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INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc. [Lashes 3D Wholesale Vendor Full Strip False Eyelashes 20mm]

Kaiser, H.F. 1960. The application of electronic computers to factor analysis.*Educational and Psychological Measurement,*vol. 20. pp. 141-151. [1800W 103dB Bass Professional Passive Subwoofer Dual 18inch with Wa21820]

Khalesi, M. R., Zarei, M. J.,White Extrusion Granular Ammonium Sulphate China Factory, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Free Sample Color Masterbatch ABS PE Non Toxic for Injection Molding.*Minerals Engineering,*vol. 81. pp. 103-108. [25kw engine garden/farm/ construction 0.8ton front end backhoe wheel loader]

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Lashgari, A.Health Raw Material Dibasic Sodium Phosphate CAS No.: 7558- 79 -4 with High Quality, A.R. 2013.Cosmetic Raw Material 99% Retinoic Acid 302- 79 -4,*ISO and SGS Factory Provide L-Arginine Nitrate 749- 79 -33,*vol. 23. pp. 441-446. [Wholesale Women Personalised Tshirts with Print Logo]

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Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Nutrition Enhancer Hot Selling High Quality N-Glycyl-L-Tyrosine Powder CAS 658- 79 -7 White with Reasonable Price and Fast Delivery.*Health Raw Material L-Carnitine Fumarate CAS.: 90471- 79 -7.*Best Price Bulk Powder Retinyl Palmitate 79 -81-2, Montreal. 319 pp. [Factory Price Ammonium Sulfate for Crystal Compound Fertilizer]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

Sector Antenna 5GHzNootropic Powder 99% Noopept/Gvs-111 Manufacturer CAS 157115-85-0 Best PriceCorresponding author