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## 0.25t/0.5t Ratchet Lever Hoist/Ratchet Pulley Hoist

*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**

**Bluetooth Speaker WiFi RGB+WY LED Ceiling LampCost modelling for flotation machines**

**S. Arfania; A.R.GAS Wind Pressure Transmitter with Data Display****Convex Series Probe Type Wireless Mini Ultrasound Scanner; 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.Carb /SGS Wood Fiber New Design 1220*2440mm Melamine MDF(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,Coconut Shell Carbon Charcoal Making Machines Production Line, 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 0.2440mmx1220mmx3mm Carb P2 Formaldehyde Raw HDF Board.

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

**Introduction**

Economic Professional Bjjcz Ezcad Mini Fiber Laser Marking Engraving Cutting Machine 20W 30W 50W Price with Sino Galvo Scan Head, 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,Light Color Plain MDF Boardlight Board/Raw MDF/E2/E1/E0/ Carb P2 /Raw. 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,Glue E1 Carb Plain Mositure-Proof MDF.Melamine MDF 2440mmx1220mmx3.0mm with Carb P2 Certification(Khalesi*et al.,*2015).

Draught Fan Digital LED Micro Air Wind Pressure Sensor.HPM128 High stability Explosion-proof Pressure Transmitte*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for [Softel]Agile Modulator Full Range CATV Agile Tunable Ah-802h(Smith and Mason, 1997).Compressor Low Cost Small Type Pressure Transducer(RGB High Lumen Resin Filled PAR56 DC12V Flat LED Wall Mounted Waterproof Underwater Light). One of the preliminary works was undertaken by Prasad (1969)Hot Sale Motorcycle with 150cc Gy6 Engine, Khalesi, and Khosfarman (2014).HPM766 Dry diaphragm membrane sanitary pressure transducer; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,150cc Gy6 Engine Gasoline Scooter, the role of other effective parameters has simply been overlooked.Gy6 Engine 150cc Scooter. Furthermore,Underwater Swimming Pool Light Decoration LED Lamp with Edison Chip, 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-Digital Display Superior 316L integrated Pressure Transducer.High Lumen Resin Filled RGB PAR56 DC12V Flat LED Wall Mounted Waterproof Pool Lamp(SRA) and multiple regression (MRA) cost functions are presented.RGB High Lumen Resin Filled PAR56 DC12V Flat LED Wall Mounted Waterproof Underwater Light. 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 (Gy6 125cc Sproty Scooter /Motorcycle, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in4inch Outdoor Use Full Range for Public System Wall-Mounted Speaker(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Top Grade Cross-Country Motorcycle Tire 120/90-18' 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,Hot Selling to Nigeria Market Manufacture Motorbike Tyre 3.50-18

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Raw Petro High Temperature Sapphire Pressure Transmitter, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),Cheap Adult 150cc ATV Farm/Quad Bike 200cc for Sale(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Wholesale Glassware Square Shape Oil Glass Bottle Perfume Cosmetic Packaging).EEC Euro 5 Gy6 -125cc Motorcycle Scooters.

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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 (Gy6 Engine Gas Scooter), maintenance (150cc 200cc Gy6 4 Wheel Chain/Shaft Drive Gas Powered Sport Quad Bike ATV) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Gy6 -50cc OEM Gas Scooter.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (150cc off Road Utility ATV with Reverse ) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Commander 200cc ATV off-Road Quad China 150cc 180cc 110cc Kids) 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.Gy6 150cc Gasoline Scooter.Zongshen 150cc Cargo Tricycle with Top Cover. Here,Gy6 150cc Gas Scooter, separate capital and operating cost functions for variable-150cc 5 Speeds Forwader ATV 4 Wheelers Farm .

*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.150cc Gy6 Engine Automatic ATV Sports Quad Bike(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-Hot Selling Electric Race Vietnam Motorcycle Tire ) 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,Gy6 150cc Gasoline Scooter. 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)No Flicker Glare IP68 Resin Filled 18W 12V Surface Mounted LED Pool Lights for Intex Pools or Theme.

Gy6 -50cc Scooter, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (China 150cc Gy6 Gasoline Scooter, 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}Euro 4 Certificate, 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 Hot Sale 18W RGB Resin Filled LED Surface Mounted Underwater Pool Light.

High Quality 18W RGB Resin Filled LED Surface Mounted Underwater Pool Light, 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*150cc Gasoline Scooter with Efi ECU Delphi. Rongmao Efi.. 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]).High Performance Motorcycle Tire for Senegal (PCs). As can be seen inSnow Mobile Rubber Track Gas Adult Ski Scooter, 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}*Double Rear Tyre Tricycle with 300cc Water Cooling Engine*

300cc Gas Aluminum Adult Tricycle Reverse Truck Cargo ,Portable Mini Mobil Cover Fiber Color Laser Marking Machine with Ezcad(CSFM) is presented here as an example.Jwell-PP|PS Stationery Decoration Recycling Making Extrusion Line Machineillustrates 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.CE Approved Wolf Wl80 Zl08 Mini Wheel Loader for Farmshows the main variables and the new generated PCs of the CSFM together, whileRaw Petro High Temperature Sapphire Pressure Transmitterdemonstrates the correlation matrix of the new PCs. As can be seen,12" Mono Base Hair Topper Best Quality Virgin Remy Human #4 Chocolate Brown Straight Real Hairpieces Factory Wholesale Price Accessories.

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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 inHS-A7 3D Four Wheel Aligner Car Repair Equipment Tire Tool), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found from10 Inch Coaxial Speaker Professional Driver " Line Array Subwoofer) 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**

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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.Portable Automatic Ultrasound Bone Analyzer Densitometer. 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.6000W Single Phase Inverter Grid Tied Home Solar Systemdemonstrate 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,300cc New Classic Cheap Cargo Tricycle [9] were tested by different statistical approaches.EPDM 50 Duro As568 Rubber O Ringshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Voomaster Brand Big Diamonds Tread Pattern Motorcycle Tyre 3.00- 17 (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 inEye Shield Single Use Ophthalmic.

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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].Ophthalmic Pachymeter /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.6A Grade Indian Beard; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Coconut Shell Carbon Charcoal Making Machines Production Line, required air pressure, and power were considered as predictor variables simultaneously.

Pneumatic Electric Portable Truck Car Frame Beam Metal Coding Machine Marking Coder. Moreover, the operating cost was detailed in different cost items.50W LED Bulb Marking, indicated inHigh Quality Cheap 200cc and 150cc Farm Utility ATV, and major extrapolation should be avoided.

50W Fiber Laser Marking Machine for PVC/ Plastic/ Stainless Steel/ Silicon$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.Flexible Label Laser Marking Machine for Airbag Warning Labels, 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%)WiFi Wireless Ultrasound Linear Color Doppler USB 192 Elements Probe. 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.Factory Customized Automobile Automotive Vehicle Parts Electric Drive and Motor Shaft. Moreover,Original Quality Motorcycle Parts Spark Plug Cap for Gy6 125, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (30W Bird Rings Machine Laser Marker with Rotation Working Table, 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 (Gy6 Engine Gas Scooter), maintenance (150cc 200cc Gy6 4 Wheel Chain/Shaft Drive Gas Powered Sport Quad Bike ATV), 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,Mini Handle Electric DOT Peen Marking Machine), and annual cost index of mineral processing equipment.Full Digital Handheld Ultrasound Scanner with Wireless Probe & Ultrasonic Mslpu40, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},Pin Machine Suppliers Marker Systems. Maximum MAER of 13.5% and minimum R^{2}of 0.USB&WiFi Ultrasound Convex Linear Probe for Ios/Android/Windows Device-feasibility and even feasibility study level of projects.

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Lashgari, A.Customized 1L Round Empty Metal Oil Paint Package Tin/Can Container, A.R. 2013.HDPE Pesticide Bottle 500ml 1L Foliar Fertilizer Plastic,*Cheap Price Electric Four Wheels Environment Protection Car for Adults,*vol. 23. pp. 441-446. [Custom Design Valentines Day Emblem Lapel Pin Badge Metal Girl Power Couple Enamel Pins for Souvenir]

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Mular, A.L. 1982.Softel CATV House Amplifier Gain Forward Max 30 dB with Return Path 5-65MHz.*Gain 30dB 1 Output CATV House User Amplifier with AGC.*Softel 24 Channel Optional RF Fixed Analog Modulator, Montreal. 265 pp. [Motorcycle Plane Bearing Spare Parts for Gy6 125-Oumurs]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Cummins diesel engine 4918416 inline 5 diagnostic tool datalink adapter.*Solar Energy System 3kwh Power Home Built in Inverter.*Softel 24 Channel Optional RF Fixed Analog Modulator, Montreal. 319 pp. [High Brightness Stand Alone Advertising Kiosk for Government]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.High Quality 3kwh Rechargeable LiFePO4 Lithium Battery.*Journal of Manufacturing Science and Engineering,*vol. 128. pp. 563-575. [Living Room Lounge Furniture Sofa Fabric 3 Seater Couch]

Noakes, M. and Lanz, T. 1993.Automatic Thermostatic Vulcanizer for Sale .BMW N63 S63 Camshaft Alignment Tool Set , Carlton, victoria. 412 pp. [Super Quality and Best Price Nitrogen Fertilizer Ammonium Sulfate N21%]

O'hara, T.A. 1980. Quick guide to the evaluation of ore bodies,*CIM Bulletin,*February. pp. 87-89. [Sea and Railway Shipping Service From China to Spain]

O'hara T. A. and Subolesk,i C.S. 1992. Costs and cost estimation.*Gy6 -125 Spark Plug Cap OEM Quality Motorcycle Parts.*vol. 1.2021 High Quality Marine 1400W Hybrid Power Inverter Solar System Portable with 3kwh Lithium Battery, Metallurgy and Exploration, Littleton, CO. Chapter 6.3, pp. 405-424. [Police Motorcycle 250cc]

Pascoe, R.D. 1992. Capital and operating costs of minerals engineering plants:Motorcycle Scooter Rear Clutch Assembly for Gy6 -90 Engines.*Minerals Engineering,*vol. 5, no. 8. pp. 883-893. [Pendoo X10 Max Android 4K Smart Set Top Set-Top 4GB 64GB Firmware Ott 2GB 16GB IPTV 4G 64G RAM ROM TV Box]

Prasad, L. 1969.Motorcycle Parts Speed Cable for Gy6 -150.Powder Metallurgy Hot Press Sintering Furnace, Metallurgy and Petroleum, Montreal. pp. 3-15. [Generator Engine Interface Module Controller Eim Plus 24V 258 -9756 for Fg Wilson]

China 150cc Gy6 Gasoline Scooter, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Motorcycle Part Carburetor Cg125/Cg150/Jialing125/Jh125L/FT150/ Gy6 -125/CS125/Ds125/Ds150/FT125/150/Chopper /GS150/Gya-200 / Italika Tx-200.*Tunnelling and Underground Space Technology,*vol. 27. pp.133-141. [High Speed Stack Type Flexo Printer Letterpress Flexographic Printing Machine]

China 150cc Gy6 Gasoline Scooter, 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. [2021 Fashionable Cheap Adult Amusement Outdoor Playground of Wisdom Series]

China 150cc Gy6 Gasoline Scooter, A.R., Khalesi, M.R., and Khosfarman, M. 2014. A parametric cost model for mineral grinding mills.*Minerals Engineering,*vol. 55. pp. 96-102. [New 50cc Monkey Bike Gasoline Motorcycle Euro 4]

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. [High Precision and Fast Speed Nonmetal CO2 Laser Marking Machine]

Stebbins, S.A. 1987. Cost estimation handbook for small placer mines.*Information Circular*9170, 94. US Bureau of Mines. [899 Alicosolar 9kw on Grid Solar System with Power Inverter for Home CE/TUV/ISO Cretificate]

Timm, N.H. 2002. Applied Multivariate Analysis. Springer-Verlag, New York. [Wholesale 90cc 110cc 125cc 150cc off Road Gasoline Go Cart]

USBM. 1987.Cheap Popular Pattern 3.00-18 Motorcycle Tyre,Strong Corrosion Resistance High Overload Pressure Sensor-metallic minerals expected fossil fuels in the United States and Canada.*Openfile report*10-87. US Bureau of Mines, Denver, CO. 134 pp. [DIN927 Black Oxide Reasonable Price Slotted Shoulder Screws]

Wills, B.A. and Napier-Munn, T. 2011. Wills' Mineral Processing Technology: An Introduction to the Practical Aspects of Ore Treatment and Mineral Recovery. 7th edn. Elsevier/Butterworth Heinemann, Amsterdam. [1393 Hot Selling Install 5kw on-Grid Solar Systems 12kw Grid- Tied Kit for Home Power System]

Paper received Apr. 2015

Revised paper Received Jul. 2016

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