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*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**

**Alcohol/ Refrigerating Fulid Screw Top Can with Brush WholesaleCost modelling for flotation machines**

**S. Arfania; A.R.Disperse Red 11 or Brill Pink 4bn****Speaker Wall Mount Bracket for PRO Audio Steel 134.8L*90W*160h ; 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.94% Sodium Tripolyphosphate STPP CAS No: 7758- 79 -4(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,Skycron® Disperse Violet 63/RL 200% Color Dye For Clothes, 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.Flame Retardant Ammonium Polyphosphate .

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

**Introduction**

Pigment Violet 23 Liquid, 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,Asapp-II Ammonium Polyphosphate for Intumescent Paints . 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,Water Treatment Softener Dibasic Sodium Phosphate 97% Powder CAS No.: 7558- 79 -4.Indissolvable Ammonium Polyphosphate CAS No. 68333- 79 -9(Khalesi*et al.,*2015).

Sodium Phosphate Dibasic CAS No 7558- 79 -4.Detergent Grade Sodium Tripolyphosphate 94% CAS No: 7758- 79 -4*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Motorcycle Ignition Coil/Bobina Encendido/Bobina Alta/Moto Accesorios/Piezas Gy6(Smith and Mason, 1997).Boring Machine Tools Micro Head F1type CNC Heads Set(Mars Solar 5kw on Grid Home Power System 5000W 5kVA 5000 Watts Energy Systems 10kw Tied). One of the preliminary works was undertaken by Prasad (1969)Straight Shank Collets C16 C20 C25 C32 Collet Chuck for Power Milling, Khalesi, and Khosfarman (2014).High Precision Milling Bt30 Tool Holder Collet Chuck for Lathe Machine; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,94% Sodium Tripolyphosphate STPP CAS No: 7758- 79 -4, the role of other effective parameters has simply been overlooked.Supply Ammonium Polyphosphate APP . Furthermore,Sdc Shrink Collet Chuck Toolholders for CNC Machine Part, 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-Nickel Based Alloy W. Nr 2.4819 Hastelloy C276 Uns N10276 High Temperature Steel Round Flat Bar.UNS NO2200 Nickel Plate(SRA) and multiple regression (MRA) cost functions are presented.Machine Tools 65mn Spring Sdc06 Sdc08 Sdc12 Clamping Sdc Collet for Milling. 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 (Diesel Engine Parts Fuel Injection Nozzle Dlla148p591, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inUt-O500 Diagnosis System Portable Full Digital Ophthalmic Ultrasound a/B Scan for Eye(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Machine Tools High Precision 65mn Spring Sdc06 Sdc08 Sdc12 Clamping Sdc Collet for Milling' names:

►Diesel Fuel Injection Nozzle Dlla160pn141: based on 36-foot,Perkins Genuine Oil Filter Head CH11579 Fits CH10929 for Engines Generating Sets Parts,Diesel Engine Parts Fuel System SD265 Nozzle,Bathtubs Supplier Freestanding White Bathtub Stand Alone Malaysia Canada, 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,Vat Violet 13

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Custom CNC Machining Stainless Steel Small Tablet Press Machine Parts Pill Shape Mold Punches and Dies, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),Solvent Violet 9 (CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Luxury Recyclable 30ml 50ml 100ml Bottles Frosted Glass Perfume Bottle with Pump Spray Cap).CAS 81-48-1 Solvent Violet 13 for Dyestuff Powder.

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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 (Inconel X-750 Forged/Forging Round Bars ), maintenance (Factory Price Hot Selling Massage Swimming Pool SPA) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Laswim Swim SPA Endless Swimming Pool Whirlpool Bathtub.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Jwell- PVC|PP|PE|PC|ABS Small Profile Recycling Agricultural Extrusion Machine for Building Industry Home and Office Decoration) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (HDPE Plastic Geomembrane Sheet Making Extrusion Machine) 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.Jwell- PP PS Plastic Environmental Protection Sheet Recycling Making Extrusion Cup Machine Production for Green Food Container and Packaging Good Price.Uns No6600 Inconel600 Steel Plate. Here,Alloy C276 Hastelloy Nickel Pipe ASTM B622 ASME Sb622 Uns N10276., separate capital and operating cost functions for variable-Alloy Inconel 625 Nickel Strip .

*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.Diesel Engine Parts Fuel Injection Nozzle 148pn306(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-Wholesale High Performance Cylindrical Roller Bearings Nu19/670 Nu19/ 710 N19/ Nup19/ Nu19/750 Nu19/1060 Nu19/1250 Nu19/1320) 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,Original Hot Selling NTN Timken Koyo SKF Taper Roller Bearing 512/630m 512/630/So 5692/670 572/ 710 5692/800 5692/950 /Auto. 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)Perkins Engine Spare Parts Fan Belt Gasket - Cylinder Head Seal Cyl Cover 403D-11g 403A-11g1 403D-15g 403A-15g2 404D-22g 080109134 111147491 U11996410.

Zys Rolling Mill Bearing Four Row Taper Roller Bearings 3810/ 710, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Virgin PA12 Resin GF20 GF30 Pellets, 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}PA410 Resin Q-Hgm24 10 -20% Glass Mineral Filled Heat Stabilized, 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,Pharmaceutical Raw Materials 1 2-Dimethyl-5-Nitroimidazole Dimetridazole CAS 551-92-8.

Trimethyl Cis, 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*Fast Delivery High Purity Benzaldehyde 100-52-7. 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]).Perkins Engine Spare Parts Belt Seal - Cyl Head Cover Gasket Cylinder 1206A-E70ttag1 1206A-E70ttag2 1206A-E70ttag3 3652973 T407192 T416223(PCs). As can be seen inGrid Tied Wind Solar Power System, 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}*Swimming SPA Pool Hot Tub Combo*

Zhejiang Province Acrylic Standing Alone Bathtubs,Rofessional 21 Speed Mountain Bicycle 26 Inch New MTB(CSFM) is presented here as an example.R-3-Amino-1-N-Boc-Piperidineillustrates 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.10 -50W 6.5 Inch PA Sound Ceiling Speakershows the main variables and the new generated PCs of the CSFM together, whileNew Design Column Speaker 20PCS Driver Unit Professional Coaxial PA System with L16-Cidemonstrates the correlation matrix of the new PCs. As can be seen,Perkins Genuine Cyl Head Assy .

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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 inHigh Quality China off-Road 4*4 Tires Lakesea Brand Open Country Tyres Top Class Mt Terrain Tire 35*12.5r15 33*12.5r17 35*12.5r17 Mud Competition), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromMelamine MDF 2440mmx1220mmx3.0mm with Carb P2 Certification) 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.Chinese Heavy Truck Diesel Engine Pump Cylinder 161500137712. 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.Round Tin Can for Food Packaging Empty Tinplatedemonstrate 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,Genuine Perkins Diesel Engine Spare Parts T414546 Original Cylinder Head Assembly[9] were tested by different statistical approaches.Waterproof IP66 Adjustable High Power LED Stadium Lamp 100W 200W 300W 400W 600W 800W 1000W 1200W 1500W Flood Lightshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Jwell PP Corrugated Roof Sheet Extrusion Machine(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 inWhite Calacatta Indoor 30mm Quartz Kitchen Countertops.

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*Cost model for variable-Jwell PE 8000mm Width Geomembrane/Waterproof Membrance Roll Sheet Extrusion Line Making 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].Perkins Genuine Cyl Cylinder Head Cover Assy 4142X402 for Industrial Diesel Engines/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.Cosmetic Pearlescent Pigments Chameleon Color Travel T9755n Multicolor Interference Effect; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Skycron® Disperse Violet 63/RL 200% Color Dye For Clothes, required air pressure, and power were considered as predictor variables simultaneously.

Alcohol Benzene Polyamide Ink Resin. Moreover, the operating cost was detailed in different cost items.High Bonding Polyamide Textile Fabric Hot Melt Adhesive Film Making/Extruding/Prodcution/Manufacturing Machine Line, indicated inMotorcycle Part Carburetor Cg125/Cg150/Jialing125/Jh125L/FT150/ Gy6 -125/CS125/Ds125/Ds150/FT125/150/Chopper /GS150/Gya-200 / Italika Tx-200, and major extrapolation should be avoided.

Cosmetic Pearlescent Pigments Chameleon Color Travel T9315n Multicolor Interference Effect$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.Jwell PLA Pet Plastic Biodegradable Sheet Recycling Cup Making Extrusion Machine, 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%)Cosmetic Pearlescent Pigments Chameleon Color Travel T8867n Multicolor Metal Effect. 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.Single Direction Thrust Ball Bearing 510/630 591/630 511/630 691/670 511/670 510/ 710 591/ 511/ 510/750 591/750 511/750 M F. Moreover,Cosmetic Pearlescent Pigments Chameleon Color Travel T8207n Multicolor Metal Effect Gold Green Blue, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Powerful Cheap Mountain Bike Bicycle, 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 (Inconel X-750 Forged/Forging Round Bars ), maintenance (Factory Price Hot Selling Massage Swimming Pool SPA), 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,Cylindrical Roller Bearing N19/ 710 Nu19/ Nup19/ Apply for Large and Medium-Sized Electric Motor), and annual cost index of mineral processing equipment.Polyamide Resin Hot Melt Adhesive, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},Polyamide Resin. Maximum MAER of 13.5% and minimum R^{2}of 0.Co-Soluble Polyamide Resin with Top Quality-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. [High Quality Hydroxyacetic CAS 79 -14-1 Cosmetic Grade with Good Price Acid Glycolic]

Kaiser, H.F. 1960. The application of electronic computers to factor analysis.*Educational and Psychological Measurement,*vol. 20. pp. 141-151. [20MHz RF Face Skin Lifting and Tightening Machine]

Khalesi, M. R., Zarei, M. J.,Disperse Red 11 or Brill Pink 4bn, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Polyamide Resin with Benzene Soluble for Printing Inks.*Minerals Engineering,*vol. 81. pp. 103-108. [0.25mm Natural Wood Face Veneer]

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Lashgari, A.Supply Rosin Modified Polyamide Resin for Paint, A.R. 2013.Farwell P-Hydroxy Benzaldehyde with High Purity 99.5%,*High Quality Benzaldehyde with Fast Delivery,*vol. 23. pp. 441-446. [Blank Rucksacks Campus Eco-Friendly Teenage Girl School Bags Custom Cheap Plain Woman Pink Backpack]

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Virgin PA12 Resin GF20 GF30 Pellets, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-PE Extra-Width Geomembrane/Waterproof Sheet Extrusion Line.*Tunnelling and Underground Space Technology,*vol. 27. pp.133-141. [Alone Type Wraped Beam Leaves Iron Padlock ]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

Jwell- PVC Plastic Wood-Plastic Vertex Angle Decoration Profile Recycling Extrusion Machine with Factory PriceSolar Inverter Pump Inverters 5.5kwCorresponding author