The cost of a ball mill conversion from overflow to grate discharge is ‘fairly’ affordable at $65,000 for a 13′ x 15′ mill. This is only for the discharge head, grates and pulp filters (rubber). A comparison in laboratory of Overflow Discharge Ball Mill VS Grate Discharge Ball Mill.

Grate Ball Mill. 1. Grate liner, 2. Bearing inner cover, 3. Hollow shaft 4.dustpan shape liner 5.central liner, 6. Rib 7. Wedge block. The grate ball mill is usually used in the first segment of the two stages, or place of discharging the rough ore. Overflow Type Ball Mill. 1. Cylinder 2,3. Cover end, 4. Main bearing 5,Hollow shaft 6. pinion 7.

A reliable mill lining supplier will always consider these factors when offering the best solution for conversion of a ball mill from an overflow to a grate discharge. For suitable mills, Metso is able to provide modelling of the mill before and after conversion to quantify the process benefits of the conversion, and then design the best discharge arrangement to meet the requirements and ...

Shanghai MG is a young and dynamic factory exporting Grate Ball Mill,Overflow Type Ball Mill,Rubber Lined Ball Mill to the overseas market for small to medium customers.

21-11-2014· Overflow verses grate discharge ball mills: an experimental investigation ... Overflow Discharge Ball Mill in Operation- Mineral Processing - Duration: 1:42. Himanshu Srivastav 24,642 views.

Overflow Versus Grate Discharge Ball Mills: An Experimental Investigation It has been widely accepted to go for grate discharge ball milling when a coarse product is preferred or to avoid production of extreme fines, but overflow discharge mills are preferred for their simplicity of …

The grate-discharge type of Ball Mill has a grate at the outlet of the shell and causes less excessive grinding, compared to the overflow type. Therefore, generally, it is best suited to grind materials up to the particle sizes ranging from 60 to 100 mesh.

We recently converted a grate discharge type ball mill (size 5.7X8.6m) to an Overflow type. Before conversion, the ball level was 26%, and we were able to obtain a grind of 90%+ passing 75mic at a throughput of 350t/h. After conversion it’s a nightmare to obtain 90%+ passing 75mic at the same thro

27-7-2017· The ball mill is a key equipment to grind the crushed materials, and the ball mill is widely used in powder-making production line including cement, silicate, new-type building material ...

1-9-2016· An overfilling indicator for wet overflow discharge ball mills. • Mathematical descriptions of volume-based slurry residence time in ball mills. • 121 sets of plant survey data used to establish the slurry residence time patterns. • The residence time thresholds as the …

A reliable mill lining supplier will always consider these factors when offering the best solution for conversion of a ball mill from an overflow to a grate discharge. For suitable mills, Metso is able to provide modelling of the mill before and after conversion to quantify the process benefits of the conversion, and then design the best discharge arrangement to meet the requirements and ...

1-9-2016· An overfilling indicator for wet overflow discharge ball mills. • Mathematical descriptions of volume-based slurry residence time in ball mills. • 121 sets of plant survey data used to establish the slurry residence time patterns. • The residence time thresholds as the …

Overflow Ball Mill is the equipment for grinding ores or other materiel with a certain particle size into smaller size. Have any questions? Contact us [email protected] +86-6315781196

Shanghai MG is a young and dynamic factory exporting Grate Ball Mill,Overflow Type Ball Mill,Rubber Lined Ball Mill to the overseas market for small to medium customers.. En.jxjq.com : visit the most interesting En Jxjq pages, well-liked by users from your country and all over the world, or check the rest of en.jxjq.com data below.

The main component of wet overflow ball mill is a cylinder with bigger diameter and smaller length which is revolved by transmitting machinery. Materials are put in cylinder through the feed opening and then thoroughly grinded. The falling course of iron balls and ores can produce huge falling impact and autogenous grinding.It is a high technological enterprise that integrated research ...

3. Energy-saving grate ball mill adopts whole milling house, which makes it easy for construction and installation. 4. Energy-saving grate ball mill has bigger discharge opening and huge processing capacity. 5. Energy-saving grate ball mill is equipped with oil-mist lubrication device which guarantees smooth operation of gears.

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For overflow ball mills, the charge should not exceed 45% of the mill volume . For grate discharge mills, the charge should occupy about 50% of the mill volume . Bond developed a relationship that can be used to determine the percent charge by volume as a function of the vertical height above the charge, He, and the radius of the mill, R, i.e.,

The mill product can either be finished size ready for processing, or an intermediate size ready for final grinding in a rod mill, ball mill or pebble mill. AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill.

Grate discharge Dry Grate discharge Wet Overflow discharge Wet Figure 8.5 Effect of mill filling on power draft for ball mills. The data is taken from Rexnord Process Machinery Reference Manual, Rexnord Process Machinery Division, Milwaukee, 1976 The effect of varying mill speed on the power drawn by the mill is shown graphically in Figure 8.4

Overflow Type Ball Mill. 1. Cylinder 2,3. Cover end, 4. Main bearing 5,Hollow shaft 6. pinion 7. Big gear ring, 8 mineral feeding device, 9. Cone shape inner cover 10. Bearing liner cover 11. Inspection hole. The overflow ball mill has relatively simple structure--the advantage of no grate fence, ...

3. Energy-saving grate ball mill adopts whole milling house, which makes it easy for construction and installation. 4. Energy-saving grate ball mill has bigger discharge opening and huge processing capacity. 5. Energy-saving grate ball mill is equipped with oil-mist lubrication device which guarantees smooth operation of gears.

Type: Ball Mill Motor Type: AC Motor Motor Power: 11-630kw Rotationl Speed: 18.7-41.6 R/Min Application: Mine Materials: Raw Ore

Grate discharge Dry Grate discharge Wet Overflow discharge Wet Figure 8.5 Effect of mill filling on power draft for ball mills. The data is taken from Rexnord Process Machinery Reference Manual, Rexnord Process Machinery Division, Milwaukee, 1976 The effect of varying mill speed on the power drawn by the mill is shown graphically in Figure 8.4

Mineral Processing Grate Ball Mill Gold Mining Machine Working Principle The transmission device drives cylinder to rotate. Materials and water are fed from the feeding end of cylinder and materials are grinded by impact and grinding of steel balls and ores into fine particles.

Ball mill is suitable for dry-type ore grinding and wet-type ore grinding. According to different discharging methods, ball mills fall into grate ball mill and overflow ball mill . - == Working Principle: == + ==Working Principle:== Our ball mill is of horizontal, cylindrical and tubular structure. It comes with two cabins and is a grate ball mill.

Ball Mills or Rod Mills. Kenmore Equipment can supply new or second hand Ball Mills or Rod Mills to specific request. From 4’ (1 metre) diameter to 18’ (5.5 metre) diameter. These can be overflow or grate discharge, supplied with the following liners:

The mill product can either be finished size ready for processing, or an intermediate size ready for final grinding in a rod mill, ball mill or pebble mill. AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill.

For overflow ball mills, the charge should not exceed 45% of the mill volume . For grate discharge mills, the charge should occupy about 50% of the mill volume . Bond developed a relationship that can be used to determine the percent charge by volume as a function of the vertical height above the charge, He, and the radius of the mill, R, i.e.,

1-1-2016· Figure 7.2 B indicates a mill where a diaphragm or grate is placed before the exit end so that particles greater than the openings of the diaphragm are not discharged but held back for further grinding.Grate discharge mills give less excessive grinding compared to overflow mills and are best suited to grinds to 150–250 μm. In Figure 7.2 C, the discharge opening is at the centre of the mill ...