- Home
*>* - How Can Impact Of L D Ratio On Cement Ball Mill

Design milled areas so that the endmillrequired is limited to 3:1 in length to diameterratio. As shown in the figure below, longer end mills are prone to chatter. If long end mills cannot be avoided, the following clearancescanbe implemented:

The productivity of ball mills depends on the drum diameter and the relation of ∫ drum diameter and length. The optimum ratio between length L and diameter D, L:D, is usually accepted in the range 1.56–1.64. The mill productivity also depends on many other factors, including thephysical-chemical properties of the feed material, the filling of the mill by balls and their sizes,the armor surface shape,the speed of rotation, the milling fineness, andthe timely moving off of the ground...

In 1999, it was found that by decreasing the ball charge filling ratio it was possible to lower the specific energy demand for grinding significantly. It was obvious, too, that the L/D ratioinfluences the specific energy demand and the mill throughputas well.

Optimizationofcontinuousballmills used for finish-grinding ofcementby varying theL/D ratio,ballcharge fillingratio,ballsize and residence time ... TheL/D ratioof theball millwas ...

Jan 07, 2015·L/D = 4.0for open circuit, D > 3.0 m andL/D= 3.0 - 3.5 for open circuit, D > 4.0 m On the other hand, the relation between the length and diameter in closed circuit is approximately the following: L = (3.0 to 3.5)*D To insure the stability of the mill tube, the requirement for minimum weight is compatible with requirement for the smallest possible surface area of the mill tube.

TheL/D ratioof theball millwas varied in four steps of 1.75, 2.1, 2.79 and 3.49, and theballcharge fillingratiowas varied in three steps of 15%, 20% and 25%. The experiments clearly indicated that the optimalL/D ratioand the optimalballcharge fillingratioare different for each feed fineness.

Ball millshape factors in the period prior to 1927 averaged 1.1/1 for 29 center discharge mills and 1.0/1 for 30 peripheral discharge mills. With the resumption of new plant construction after the 1930’s depression, the Morenci concentrator continued the 1/1ratiowith its 3.1 x 3.1 m (10 x 10 ft) mills. Theratiowas increased progressively from then on, reaching 1.6 and 1.8/1 for the ...

TheL/D ratiowas varied in 4 stages and the grinding media fillingratioin 3 stages. ... energy consumption of theball mill canbe lowered by about 20% by reducing theballfilling factor from ...

Jan 07, 2015· For one compartmentmillthisratiois (L/D) =1.5 A two compartmentmillhas aratio of (L/D) = 3.0 A three compartmentsmillhas aratio of (L/D) = 4.5 However, for optimummillsizing, theseratiosof length to diameter must be compatible with grinding requirements. 6.

R. Schnatz, “Optimization of continuousballmills used for finish-grinding ofcementby varying theL/D ratio,ballcharge fillingratio,ballsize and residence time,” International Journal of Mineral Processing, vol. 74, supplement, pp. S55–S63, 2004.

Themillcirculating load is 275 per cent. Themilloutput is 12tph at 2900cm 2 /gm Blaine. Total grindingballcharge in themillis 50t. Separator efficiency is 37 per cent. We want to know if themilloutput and Blainecanbe increased or is it the maximum formillof this size. Secondly, is themilltubeL/D ratioat 4.16 too high for ...

Sep 13, 2017· The factors affecting the strength ofconcreteare mentioned below. These factorscanbe either dependent or independent of each other when comes to theconcretestrength. Most of the factors are interrelated in certain means. The primary factor that has a higher influence on the strength of theconcreteis the mix design factors. Each of them is mentioned and explained in detail one by one.

Most are low aspectL/D ratioranging from 1.4:1 to 1.5:1; Installed power up to 1800 KW (2,500 HP) Most discharge via trunnion-overflow; Volumetric loading is similar to that of aball mill(30-35%) Design standards for drive components are more demanding thanballmills; Dry applications feature a peripheral discharge or an air-swept arrangement

Optimization of continuousballmills used for finish-grinding ofcementby varying theL/D ratio,ballcharge fillingratio,ballsize and residence time R. Schnatz Chemistry

Feb 06, 2009· The tool’s length-to-diameterratiois significant in any milling process. The larger theratio, the less rigid the setup. However, the difference in performance between different levelsof L:Dbecomes even more pronounced when tools are particularly small. This video shows machining footage involving tools as small as 0.008 inch in diameter.

Optimization of continuousballmills used for finish-grinding ofcementby varying theL/D ratio,ballcharge fillingratio,ballsize and residence time R. Schnatz Chemistry

Mar 19, 2004· This becomes critical when machining deep holes, because it is necessary to use a tool with large length to diameter (L/D)ratioor overhang. A high degree of overhang, together with the material properties of the workpiece and various other factors,canlead to excessive vibrations in the tool shaft, which in turn causes undesirable chattering.

how can impact of l d ratioofcement ball millOnline Chat · TheL/D ratioof theball millwas varied in four steps of 1.75, 2.1, 2.79 and 3.49, and theballcharge fillingratio…

Sep 13, 2017· The factors affecting the strength ofconcreteare mentioned below. These factorscanbe either dependent or independent of each other when comes to theconcretestrength. Most of the factors are interrelated in certain means. The primary factor that has a higher influence on the strength of theconcreteis the mix design factors. Each of them is mentioned and explained in detail one by one.

Cement MillNotebook. Central or Girth Gear Drive forBallMills - 1. 03BallMills.ball-mill. ... 15 HGRS Tikaria_MillWorkshop SEPT-07 Elements ofBall Mill... 55 for big and small mills (Notchimpactstrength 4 – 10 J/cm2) liners. 28 HGRS Tikaria_MillWorkshop SEPT-07 Life Time of Shell Liners.

Jul 22, 2010·Formulas kiln1. Residence time in Kiln “t” = 1.77 (Phy)^1/2L_____ Alpha*D*N Phy =Angle of repose for lime stone ~ 36 DegreeL= length of Kiln in meter Alpha = Kiln inclination in %D= Effective diameter of Kiln in meter N = Rotation per minute rpm

CLINKER GRINDING ANDCEMENTPACKING. Roller press withball millis used to grind the clinker. 3.5 to 4% Gypsum is added to make OPC. To make PPC, up to 35 % fly ash is added to the clinker in addition to Gypsum. Three grades ofcement(OPC 43, 53 and PPC) are manufactured and stored in silos.

Specializes in design and supply of equipment for optimum handling of bulk material. Products fall into two main categories: flow aid and recovery units and accessories, and conveyor handling and control systems and attachments.

The specific surface Blaine of thecementwas 4,050 m 2 /kg; fineness of the collected coal fly ash was 3,976 m 2 /kg. The coalbottom ashwas ground in aball millup to a Blaine fineness of 3,463 m 2 /kg, similar to that of the Portlandcement(5–8% residue on 45 μm sieve).. Several coal fly and ground coal bottom ashes were mixed in the laboratory using a powder mixer.