GEDETERMINACION DE LA GRAVEDAD ESPECIFICA DE LOS MEDIOS MOLEDORES

Tipo bolaN Bola12345678910Bolas laminadasPeso (g)557.80555.10549.10563.40561.70558.00554.40551.30545.40549.00Volumen (ml)74.0072.0071.0074.0074.0072.0072.0072.0070.5071.00GE7.547.717.737.617.597.757.707.667.747.73N Bola11121314151617181920Peso (g)556.50555.40561.50555.40569.20550.10557.50551.80548.30549.50Volumen (ml)71.0072.0072.0071.0074.0072.0074.0072.0070.0070.00GE7.847.717.807.827.697.647.537.667.837.85Tipo bolaN Bola12345678910Bolas fundidasPeso (g)573.30619.30636.90625.50626.00645.80640.50596.20640.10638.90Volumen (ml)73.0080.0080.0080.0082.0085.0084.0079.0084.0084.00GE7.857.747.967.827.637.607.637.557.627.61N Bola11121314151617181920Peso (g)610.80623.50611.60636.10620.60644.70631.00607.30612.70633.30Volumen (ml)80.0082.0080.0084.0080.0084.0082.0080.0080.0081.00GE7.647.607.657.577.767.687.707.597.667.82Tipo bolaGEBolas laminadas7.71Bolas fundidas7.68

Nivel llenadoEVALUACION DEL MOLINO DE BOLAS N9

Se utilizaron los planos del molino para determinar las todas las dimensiones necesariasMoly-Cop Tools TM (Version 3.0)LxD DETERMINATION OF CHARGE LEVEL IN A MILLDimensiones sin forros (m)5.030x8.426by Measuring Free Height Above the Charge

1. Volumen del molinoRemarks : Ball Mill # 9

Volumen del molino167.435m3

2. Volumen forros totalEffective Mill Diameter,15.90 ft4.85 mEspesor forrosEffective Mill Length26.79 ftTapas13.000cm8.17 mShell18.500cmAverage Measurements ofVolumen forrosFree Height (h) :10.31 ftTapas5.167m33.14 mShell22.995m3

Volumen total forros33.328m3Angle f, degrees145.43
Autor: Center angle created by the two radius pointing at the opposing extremes of the top charge surface.3. Volumen util del molinoCharge Level, %31.37
Autor: Percentage of the total effective mill volume being occupied by the charge, including all interstitial voids.Volumen util139.274m3

4. Dimensiones del molino (con forros)Moly-Cop Tools TM (Version 3.0)CONVENTIONAL BALL MILL POWER ESTIMATIONDiametro efectivo (D)4.845mHogg & Fuerstenau ModelLongitud efectiva (L)8.166mDiametro menor (d)1.440mRemarks Base Case Example Altura libre (H)3.143mMillPower, kWMill Dimensions and Operating Conditions2446
Autor: Component of the Total Mill Power Draw (Cell J14) contributed by the Ball Charge. BallsEff. DiameterEff. LengthMill SpeedChargeBallsInterstitialLift0
Autor: Component of the Total Mill Power Draw (Cell J14) contributed by the Overfilling Slurry on top of the "kidney". Overfillingftft% CriticalFilling,%Filling,%Slurry Filling,%Angle, ()486
Autor: Component of the Total Mill Power Draw (Cell J14) contributed by the Interstitial Slurry in the ball charge. Slurry15.90
Autor: Mill Diameter, inside liners.26.79
Autor: Effective Grinding Lenght.70.00
Autor: Rotational Mill Speed, expressed as a percentage of the critical centrifugation speed of the mill.31.37
Autor: Total Apparent Volumetric Charge Filling - including balls and excess slurry on top of the ball charge, plus the interstitial voids in between the balls - expressed as a percentage of the net internal mill volume (inside liners).31.37
Autor: In some cases - particularly with Overflow Discharge Mills operating at low ball fillings - slurry may accumulate on top of the ball charge; therefore, the Total Charge Filling Level (Cell F14) could be higher than the actual Ball Filling Level (Cell G14).100.00
Autor: This value represents the Volumetric Fractional Filling of the Voids in between the balls by the retained slurry in the mill charge.As defined, this value should never exceed 100%, but in some cases - particularly in Grate Discharge Mills - it could be lower than 100%.Note that this interstitial slurry does not include the overfilling slurry derived from the difference between Cells F14 and G14.34.40
Autor: Represents the so-called Dynamic Angle of Repose (or Lift Angle) adopted during steady operation by the top surface of the mill charge ("the kidney") with respect to the horizontal. A reasonable default value for this angle is 32, but may be easily "tuned" to specific applications against any available actual power data.2932
Autor: See attached Worksheet About ... Net Totalrpm 13.4510.00 % Losses3258 Gross Total

% Solids in the Mill72.00ChargeMill Charge Weight, tonsApparentOre Density, ton/m34.60Volume,BallSlurryDensitySlurry Density, ton/m32.29m3ChargeInterstitialabove Ballston/m3Balls Density, ton/m37.6847.32218.0543.360.005.524
Autor: Corresponds to the ratio between the Total Charge Weight and its Apparent Volume (including interstitial voids).

5. Nivel de llenadoNivel llenado bolasVolumen llenado de bolas47.22m3

Volumen llenado de conosMaterial de los forrosDensidad aparente136.89kg/pie3% volumentrico forros4.83TM/m3N forros en el shellN forros expuestos en el shellPeso bolas acero228.28TMNivel llenado conos sin forrosTorque 242.23N.mVolumen forros del nivel llenadoCarga Nominal90.49%

L: Longitud interna del molinoNM: Nivel medio del molinoD: Diametro interno del molinoMN: Maximo nivel de llenadod: Diametro de la boca de alimentacionNota: Se utilizaron los planos del molino para determinar las todas las dimensionesPotencia (KW)Carga Nominal (%)Peso acero ( TM )Nivel Llenado (%)3257.5990.49228.2831.37

Densidad aparenteDETERMINACION DE LA DENSIDAD APARENTE DE LOS MEDIOS MOLEDORESPUNTO 1PUNTO 3Densidad Aparente138.620kg/pie3Densidad Aparente136.530kg/pie3Densidad Aparente139.450kg/pie3Densidad Aparente137.090kg/pie3Densidad promedio139.035kg/pie3Densidad promedio136.810kg/pie3Punto 1Punto 2Punto 3Punto 4MallaPeso (kg)MallaPeso (kg)Densidad aparente139.035135.465136.810136.2602"36.452"25.081"181.941"187.19Pesos (kg)3/4"15.983/4"10.29MallaPunto 1Punto 2Punto 3Punto 45/8"6.535/8"3.662"36.4551.3525.0824.021/2"5.581/2"2.461"181.94189.67187.19213.123/8"1.383/8"0.123/4"15.989.8910.2912.351/4"0.631/4"0.015/8"6.532.593.664.68Total248.49Total228.811/2"5.581.382.463.343/8"1.380.100.1250.9PUNTO 2PUNTO 41/4"0.630.020.0112.9Total248.49255.00228.81321.31Densidad Aparente134.640kg/pie3Densidad Aparente134.960kg/pie3Densidad Aparente136.290kg/pie3Densidad Aparente137.560kg/pie3cmmlPunto 1%ARAPDensidad promedio135.465kg/pie3Densidad promedio136.260kg/pie35.0850.836.4514.668598333914.668598333985.33140166612.5425.4181.9473.218238158587.886836492412.1131635076MallaPeso (kg)MallaPeso (kg)1.90519.0515.986.430842287494.31767877985.68232122022"51.352"24.021.587515.8756.532.62787234996.94555112883.05444887121"189.671"213.121.2712.75.582.245563201799.19111433060.80888566943/4"9.893/4"12.350.95259.5251.380.555354340299.74646867080.25353132925/8"2.595/8"4.680.6356.350.630.253531329210001/2"1.381/2"3.34248.491003/8"0.103/8"50.91/4"0.021/4"12.9Total255.00Total321.31

Curva de arranque

Hoja3

Punto 1Punto 2Punto 4Punto 3ALIMENTODESCARGA