ball mill grinding media kiski bani hai

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% of grinding media in ball mills for both chambers - page 1 of 1

Hai friends,Can you tell me anybodyabout how much % of grinding media required for first/second chambers & Ball to Clinker Ratio for cement grinding with 3000 blaine.How to estimate the % of grinding media with empty height. How to estimate the Size of the of the grinding media for first and second chambers. Mill dimensions are: Dia.(m) Lengh(m) Vol(m3)1st cha. 4.88 5.28 98.852nd cha: 4.88 9.58 179.27Grinding media density for 1st chamber: 4.5 tons/m3 and 2nd chamber: 4.6 tons/m3ByBandari

Can you tell me anybodyabout how much % of grinding media required for first/second chambers & Ball to Clinker Ratio for cement grinding with 3000 blaine.How to estimate the % of grinding media with empty height. How to estimate the Size of the of the grinding media for first and second chambers. Mill dimensions are:

The volumetric filling degree of modern finish mill is 27-30% for the first chamber and 24-27% for the second chamber.In your specific case first chamber may be loaded 114.76 MT- 127.52 MT and in second chamber you may load 197.91 MT - 222.65 MT.You should start media loading in both the chambers from lower value first and based on grinding performance you may increase the load in phase manner.Grinding media density for first chamber you should take 4.3 t/m3.

simulation on stress of large diameter cadi grinding ball based on ansys | springerlink

The falling ball tests were carried out on the 125 mm diameter Carbidic Austempered Ductile Iron (CADI) grinding balls with Mn content of 2.0wt.%, 2.3wt.%, 2.6wt.% and 3.0wt.%, respectively, and the kind of grinding ball with the most serious spalling was selected for stress simulation. The stress distribution between four grinding balls in the elbow of the falling ball test device when they collided with each other was simulated based on ANSYS. Results of the falling ball tests show that the spalling and mass loss of a CADI grinding ball increases with the increase of Mn content, and the CADI grinding ball with 3.0wt.% Mn shows the most obvious spalling and mass loss. The simulation results of stress distribution of a CADI grinding ball show that the maximum impact stress does not appear in the center of the contact area, but in the annular area (inner diameter of 20 mm and outer diameter of 50 mm) in the section with a depth of 515 mm below the grinding ball surface. The actual spalling of the ball is consistent with the simulation results, and the oxide-based impurities in CADI grinding ball accelerate the spalling of the grinding ball in service.

Hebbar R. Investigation on grinding wear behaviour of austempered ductile iron as media material during comminution of iron ore in ball mills. Transactions of the Indian Institute of Metals, 2011, 64(3): 265269.

Chiniforush E A, Yazdani S, Nadiran V. The influence of chill thickness and austempering temperature on dry sliding wear behaviour of a Cu-Ni carbidic austempered ductile iron (CADI). Kovove Materialy-Metallic Materials, 2018, 56(4): 213221.

Yang P H, Fu H G, Nan R, et al. Effect of Ti modification on microstructures and properties of carbidic austempered ductile iron. Journal of Materials Engineering and Performance, 2019, 28(4): 23352347.

Yang P H, Fu H G, Lin J, et al. Thermodynamic and kinetic analysis of austenite homogenization on carbidic ductile iron. Steel Research International, 2019, https://onlinelibrary.wiley.com/doi/full/10.1002/srin.21900256.

Dakre V, Peshwe D R, Pathak S U, et al. Effect of austenitization temperature on microstructure and mechanical properties of low-carbon-equivalent carbidic austempered ductile iron. International Journal of Minerals Metallurgy and Materials, 2018, 25(7): 770778.

Liu J H, Xiong P, Fu B G, et al. Effects of austempering temperature on microstructure and surface residual stress of carbidic austempered ductile iron (CADI) grinding balls. China Foundry, 2018, 15(3): 173181.

Kavicka F, Stransky K, Dobrovska J, et al. Numerical and experimental investigation of the temperature field of a solidifying massive ductile-cast-iron roller. Materiali in Tehnologije, 2012, 46 (4): 321324.

This work was financially supported by the Natural Science Foundation of Hebei Province of China under Grant Nos. E2016202100 and E2017202095, the National Natural Science Foundation of China (NSFC) under Grant No. 51601054, the Scientific and Technological Transformative Project of Tianjin Supporting Beijing-Tianjin-Hebei under Grant No. 18YFCZZC00030.

Zhao, Xb., Yan, Js., Liu, Jh. et al. Simulation on stress of large diameter CADI grinding ball based on ANSYS. China Foundry 17, 227234 (2020). https://doi.org/10.1007/s41230-020-9132-4

influence of ball size distribution on grinding effect in horizontal planetary ball mill - sciencedirect

The law of ball size distribution (Dbsd) in the horizontal planetary ball mill is studied by the DEM, and takes the simulation results compared with the grinding test results, reveals practical significance of the simulation.We have obtained the specific rates of breakage can be determined by the mean contact force.Friction work reduces with the rise of the larger-size balls in Dbsd, and experiments show that contact area of the material also reduces, the finished product match RosinRammlerBennet (RRB) equation completely.

The law of ball size distribution (Dbsd) in the horizontal planetary ball mill is studied by the DEM, and takes the simulation results compared with the grinding test results, reveals practical significance of the simulation.

Friction work reduces with the rise of the larger-size balls in Dbsd, and experiments show that contact area of the material also reduces, the finished product match RosinRammlerBennet (RRB) equation completely.

The law of ball size distribution in the horizontal planetary ball mill is studied by the discrete element method. The results show that the maximum impact energy could be acquired when filling rate is 24%, moreover the biggest mean contact force and the highest energy utilization ratio of balls could be acquired when the speed ratio is 1.5. The mean contact force increases with the proportion increasing of the large balls, which means ball size distribution has some effect on the crushing and grinding process. And according to the experimental results for comparative analysis, the specific rates of breakage Si increases with the proportion rise of large balls in ball size distribution, meanwhile Si can be determined by the mean contact force(Fmcf): Si=A10kfmcf, where the constant A is 0.437, the gradient k is 0.0252. At last the specific surface area of the product is measured and the particle size distribution (under 80m) is analyzed by RosinRammlerBennet equation. The results show that with the proportion increasing of the large balls, the specific surface area decreases, while the uniformity coefficient and the characteristic diameter increases.

The process of DEM simulations. The results of experimental: 1. Influence of Ball Size Distribution on Grinding Effect in Horizontal Planetary Ball Mill. 2. Jiaguan Zhang, Yang Bai, Hai Dong, QiongWu, Xuchu Ye. 3. The paper mainly studies the influence of ball size distribution on grinding effect in horizontal planetary ball mill by using a combination of DEM simulation and experimental methods.Download : Download full-size image