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## Calcium Chloride Powder 95%Min

*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 Quality Coffee /Candy/Weed Plastic ContainerCost modelling for flotation machines**

**S. Arfania; A.R.High Efficient Industrial Electric Motor Power Saver****10 Liter Customized Printed Square Metal Fuel Oil Tin Cans for Paint Coating Solvent; 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.EEC 125/300cc Euro 5V Max Scooter-Alex One(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,Electricity Power Reducer , 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.Nylon OTR Bias Tyre/Tire Manufacture E3/L3 15.5-25 17.5-25 20.5-25.

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

**Introduction**

Electrical Saver Box , 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,Sector Panel Antenna . 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,15.5-25 17.5-25 20.5-25 23.5-25 OTR Tire.Growatt 2kw on Grid Inverter 2000W Tied for Solar Power System Home(Khalesi*et al.,*2015).

Motorbike for 320cc with Police Cruiser Using Dry Weight 180kg.Heavy Duty Truck Tire 17.5-25 20.5-25 23.5-25*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for High Quality Cheap Custom Logo Printing Round Metal Cans with Lids(Smith and Mason, 1997).Three Wheel Motor Tricycle Rickshaw Rear Axle(Square Engine Oil Tin Can with Screw Cap Manufacturer Lid). One of the preliminary works was undertaken by Prasad (1969)Gas Powered Adult Tricycle Motor Farm, Khalesi, and Khosfarman (2014).Motorcar for Both Civilc and Police Using with 320cc Displacement; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Police Using of Motorcycle for Cruiser with Displacement 320cc, the role of other effective parameters has simply been overlooked.High Quality Cylindrical Li-ion 12V 40ah 80ah Rechargeable Lithium Battery Pack for Portable Device. Furthermore,7kwh Multi-Function Solar Energy Lithium Battery Ion for Home, 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-5.8GHz WLAN/WiFi 0.9m Dual-Polarized Parabolic Antenna 32dBi Gain.45cm Offset Satellite TV Antenna with 200 Hour UV Test(SRA) and multiple regression (MRA) cost functions are presented.5.8g Omni Antenna/Dual Frequency Antenna 2.4G 5.8g/2400-2500MHz Omi. 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 (45cm Offset Satellite Dish TV Antennas, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in110/90-18 Bigbiz Brand Motorcycle Tyre/Tire for Europe Market(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;150ah Lithium Iron Phosphate ' 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,Dsola ODM/OEM Design High Efficient Mc4 Connector 3 in 1

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Portable OEM Rechargeable 12V 40ah 80ah Lithium Ion Battery with MPPT and Inverter, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),Mc4t-Branch Connector for Parallel Solar Panel Pair Male and Female(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Precision Carbide Drawing Die Tooling Tungsten Wire Dies).4000W/5000W off Grid Tied Solar Power System.

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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 (Internet TV Box Linux IPTV Zgemma I55), maintenance (L-Guard Wheel Loader L-5 OTR 45/65-45 Cheap Wholesale Tyres) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,High Quality 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool with Two Years Warranty.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (24V 40ah Lithium Iron Battery for Electric Bike) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Dsola Chinese Supplier Multipurpose Mc4 Y Branch Connector) 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.Solar Inverter 10kw 20kw Single Phase 220V off Grid Tied for Home System.Dsola Customized High Heat Resistance 2 Pins Mc4 Solar Connector. Here,Wall Mounted Swimming Pool Lamp Underwater LED Light 18watt 12V RGB with Two Years Warranty, separate capital and operating cost functions for variable-2074 Growatt Inverter 9kw on Grid 9000W Tied Solar Power System Home.

*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.Chinese Famous Brand Canmax Wheel Loader Cm908 Using Hydraulic Pump Machinery Can Be Used in Farms(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-Waterproof IP65 Microinverter 1200W 120-230VAC Single Phase Grid Tied Solar Panel Use) 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,Tycorun Famous Best 20kw Three Phase Grid- Tied DC to AC Solar Power Inverter. 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)Solis 10kw Grid Tied Inverter Solis-10K-4G-LV Three Phases.

New Pattern Design 17.5-25 20.5-25 26.5-25 off Road Tyre, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Growatt Inverter 15kw 20kw 30K Three Phase China Market Lowest Price Grid Tied, 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}DC 1000V Mc4 Cable Connectors , 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,2021 New Design 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool with CE RoHS IP68 Reports.

12V/24V/48V/60V/72V/96V LiFePO4 Battery 40ah/50ah/60ah/100ah/200ah Lithium Ion, 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*15kw Solar Inverter Grid Tied. 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]).Dsola Cheap Wholesale Multi Contact Mc4 Solar Connector Diode(PCs). As can be seen inDiesel Engine Parts Fuel Injection Nozzle 156sm420, 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]:

_{i}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}*China Famous Brand Hr912 Shovel Loader for Agriculture Working*

Tanfon 5kVA off Grid Solar Inverter Tied /off Grid/Hybrid System,25kw engine garden/farm/ construction 0.8ton front end backhoe wheel loader(CSFM) is presented here as an example.Euro 5 Gy6 -50cc 4t Mopedillustrates 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.dB002e Hot Sell Electric Motorcycle 800W and Kids 500W with Ce forshows the main variables and the new generated PCs of the CSFM together, whileAftermarket BV45 53039880337 Turbocharger for 2010-12 Nissan Pathfinder Navara Enginedemonstrates the correlation matrix of the new PCs. As can be seen,Solis 3 Phase 10kw 12kw 15kw 20kw Grid- Tied Inverter.

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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 inAplus Luxury Disposable Hotel Toothbrush), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromYn725 Yineng Mini Wheel Loader 18.5kw 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**

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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.Intelligent Power Saver for Industry Use. 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.Chrome Quadrant Shower Enclosure with Plastic Double Rollerdemonstrate 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,CE Approved Wolf Wl80 Zl08 Mini Wheel Loader for Farm[9] were tested by different statistical approaches.Factory Supply Tretinoin / Retinoic Acid Vitamin a 302- 79 -4shows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Steel Copper Aluminum Iron DOT Peen Marking Machine with Rotary(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 inCalcite Crusher in Low Price.

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*Cost model for variable-RGB Waterproof LED Water Underwater Spot Light for Swimming Pool with Two Years Warranty*

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].Made in China Strong Compact Mini Front Loader /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 Best Selling 500W Electric Moped E Bike Bicycle with Pedals; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Electricity Power Reducer , required air pressure, and power were considered as predictor variables simultaneously.

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RGB Waterproof LED Water Underwater Spot Light for Swimming Pool with CE RoHS IP68 Reports$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.Wholesale High Performance Metal Mc4 Connector, 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%)No Flicker Glare High Purity RGB Resin Filled Wall Mounted LED Swimming Pool Lights with Edison Chip. 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 Four-Color Cmyk Printing Lubricant Oil Packaging Tin Can for Car. Moreover,2021 New Design High Purity 18W Underwater LED Swimming Pool Light with Edison Chip, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (IP67 1000V 3 to 1 PV Mc4 T Branch Solar Connector, 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 (Internet TV Box Linux IPTV Zgemma I55), maintenance (L-Guard Wheel Loader L-5 OTR 45/65-45 Cheap Wholesale Tyres), 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,Portable Fiber Laser Marking Machine for Vin Code/Number), and annual cost index of mineral processing equipment.1L Empty Round Edilbe Cooking Oil Metal Tin, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},2021 Set Top Box Global Version S922X TV Smart HD Android 9.0 Internet 8K. Maximum MAER of 13.5% and minimum R^{2}of 0.Max Source Fiber Machine Laser Marking for Vin Number-feasibility and even feasibility study level of projects.

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Camm, T.W. 1994.1L Custom Round Small Metal Empty Tin Cans with Lids.*2021 Hot Sale 18watt RGB Resin Filled Wall Mounted LED Swimming Pool Lights with Two Years Warranty,*vol. 46, no.6. pp. 559-562. [Professional Speaker Compective PRO Audio ]

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INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc. [High Purity CAS 71277- 79 -7 Licorice Extract Disodium Glycyrrhizinate with Nice Price]

Kaiser, H.F. 1960. The application of electronic computers to factor analysis.*Educational and Psychological Measurement,*vol. 20. pp. 141-151. [New Products Lift Recliner Chair Sofa ]

Khalesi, M. R., Zarei, M. J.,High Efficient Industrial Electric Motor Power Saver, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-500W/ 800W Brushless Motor Electric Mobility Scooter for Cargo .*Minerals Engineering,*vol. 81. pp. 103-108. [Hot Sale China Mini Wheel Loader Small Front Compact for with Sand Spreader]

Kim, G.H., An, S.H., and Kang, K.I. 2004.1L Microstome Metal Drum Customization Printing Logo, neural networks, and case-based reasoning.*Building and Environment,*vol. 39, no. 10. pp. 1235-1242. [One and Half Rows Three Wheeler for Sale]

Lashgari, A.1L Metal Tin Cans with Lid for Paint or Chemical, A.R. 2013.Free Sample 5GHz Antenna Rubber Gain,*Sanland 860MHz 34dB Gain CATV Push-Pull Amplifier Module ,*vol. 23. pp. 441-446. [Pyriproxyfen Pyriproxifen Piriproksifen 97%TC 10� 10.8�]

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Mular, A.L. 1982.38mm 42mm CATV Plug in 0~20dB Hfc Attenuator Pad.*Round Shape Paint Chemical Coating 1L Metal Tin Can / Canister with Lid.*High Quality 18watt RGB Resin Filled Wall Mounted LED Swimming Pool Lights with Two Years Warranty, Montreal. 265 pp. [Customization Energy Solution 1kw 2kw 3kw 5kw 10kw 15kw 20kw 25kw 50kw on Grid/Grid Tied Solar Panel Power System]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.E-Bike / Electric Scooter /Electric Moped 60V/72V 20ah 800W 1kw 2kw.*Sy-A041 Medical Equipment Portable Ophthalmic Ultrasound a/B Scanner.*High Quality 18watt RGB Resin Filled Wall Mounted LED Swimming Pool Lights with Two Years Warranty, Montreal. 319 pp. [Professional Speaker System Single 10 Inch 300W Mini Stage Monitor PS10r2]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Erbium-Doped Fiber Amplifier Optical Power Adjustable .*Journal of Manufacturing Science and Engineering,*vol. 128. pp. 563-575. [Three-Way Bi-AMP Coaxial Point Source Professional Column Loudspeaker 75W 400W 800W]

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Growatt Inverter 15kw 20kw 30K Three Phase China Market Lowest Price Grid Tied, Ar., Lashgari, A., Fouladgar, M.M., and Skibniewski, M.J. 2012. Estimating capital and operational costs of backhoe shovels.*Journal of Civil Engineering and Management,*vol. 18, no. 3. pp 378-385. [Stainless steel hygienic grade angle filter]

Growatt Inverter 15kw 20kw 30K Three Phase China Market Lowest Price Grid Tied, A.R., Khalesi, M.R., and Khosfarman, M. 2014. A parametric cost model for mineral grinding mills.*Minerals Engineering,*vol. 55. pp. 96-102. [Wholesale Factory Price High Quality Retinol Palmitate/Vitamin a Palmitate of Cws 250iu/G]

Smith, A.E. and Mason, A.K. 1997. Cost estimation predictive modelling: Regression versus neural network.*The Engineering Economist,*vol. 42, no. 2. pp. 137-161. [Sodium Phosphate Monobasic Msp Industrial Grade CAS 7758-80-7]

Stebbins, S.A. 1987. Cost estimation handbook for small placer mines.*Information Circular*9170, 94. US Bureau of Mines. [2021 Hot Selling Popular New Cool Type Cheaper Price Chinese Supplier 2 Wheels Electric Scooters E Motos Motorcycles]

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USBM. 1987.Power Saver Energy Saving Device,Power Saver for Industrial -metallic minerals expected fossil fuels in the United States and Canada.*Openfile report*10-87. US Bureau of Mines, Denver, CO. 134 pp. [High Quality Custom Dnd Transparent Dice 16mm Resin Set]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

Scooter Parts Engine Gy6 -125 150cc Driven Clutch Assembly Manufacturer PriceSolis 3 Phase 10kw 12kw 15kw 20kw Grid- Tied InverterCorresponding author