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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

Nov 21, 2014· (1) Rao Latchireddi, (1) Raj K Rajamani and (2)Sanjeeva Latchireddi. (1) University of Utah, (2) EE-Mill Solution LLC, USA.

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 design and production of finer product. In grate discharge ...

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

A grate assembly at the discharge en d of the mill permits retention of a higher ball charge (up to 50%) than is possible in an overflow mill which has a practical limit of around 40%. Behind the grates is a lifting compartment which picks up the ground material as it passes through the grates and transports it out of the mill.

Ball mill is a type of widely used ball grinding mill in cement and silicate products, new ... and all kinds of ores and other grind-able materials can be ground by dry or wet ball mill. ... the materials discharging mode is force by grate instead of control discharge by overflow,...

Overflow VS Grate Discharge Ball or Mill - Why Retrofit. Metallurgical ContentTypes of Ball Mills Ball Mill GrindingExample of Plant Capacity GainsBall Mill SpecificationsCompare Type of Mill DischargeGrate Discharge Ball Mill CapacitiesGrate Discharge Ball Mill Arrangement & Dimensions Allow me to compare: Ball mills can be of the overflow or ...

Overflow VS Grate Discharge Ball or Mill - Why Retrofit. Metallurgical ContentTypes of Ball Mills Ball Mill GrindingExample of Plant Capacity GainsBall Mill SpecificationsCompare Type of Mill DischargeGrate Discharge Ball Mill CapacitiesGrate Discharge Ball Mill Arrangement Dimensions Allow me to compare: Ball mills can be of the overflow or of the grate discharge type.

Principle of overflow ball mill: the main component is a cylinder with diameter and length at a reasonable proportion.Driven by the transmission device, the cylinder rotates with the materials fed from the cylinder inlet and crushed by the falling impacts and autogenous grinding of the steel balls and ores in …

ball mill dischage grate magnet simpulindonesia. ball mill dischage grate magnet Grinding Mill China Grate ball mill,grate discharge ball mill. Overflow Versus Grate Discharge Ball . 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

Overflow VS Grate Discharge Ball or Mill Why Retrofit. The discharge end of the Grate Discharge Ball Mill has at least ten times the discharge opening area through the grate slots compared to the common trunnion overflow type mill The discharge grates are designed to run clean and free of any blinding or choking The pulp level in the mill may be varied by merely changing the

Ball mills designed for long life and minimum maintenance overflow ball mill sizes range from 5 ft. x 8 ft. with 75 HP to 30' x 41' . and as much as 30,000 HP. Larger ball mills are available with dual pinion or ring motor drives. Our mills incorporate many of the qualities which have made the Marcy name famous since 1913.

Grate Discharge For Ball Mill. KURIMOTO Powder System -Ball Mill- – ... There are two main type ball mill:Grate Discharge and Overflow Discharge . Specifications of Ball Mill. Model. Drum (mm) Volume (m 3) Revolution. Motor (KW) Mills – Osborn South Africa: About Osborn South Africa.

grate discharge ball mill samac - zuidwesteu optimum critical speed for grate discharge mills mill discharge gratesmgcarpetsGrate Discharge Ball Mills Grates can be added to the discharge grate vs overflow speed of vertical roller mill - krainarzemioslaeu End Mill ball mill is speed of 44 what is the optimum rotation speed for a ball mill .

mining machinery overflow type ball mill. Overflow VS Grate Discharge Ball or Mill Why Retrofit. In the case of ball mills these are the overflow type, The use of this construction permits pulp to discharge There is no complicated mechanical arrangement to compensate for pulp level changes.

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.

Overflow VS Grate Discharge Ball or Mill - Why RetrofitAllow me to compare: Ball mills can be of the overflow or of the grate discharge type. Overflow discharge

Overflow VS Grate Discharge Ball or Mill Why RetrofitMar 19 2017 . Allow me to compare Ball mills can be of the overflow or of the grate discharge type. Overflow discharge mills are used when a product with.overflow ball mill Overflow Versus Grate Discharge Ball Mills …

Overflow VS Grate Discharge Ball or Mill - Why Retrofit Grinding mills can by classified by which types of discharge the ball mill has installed to let out the ground slurry. Best is rapid change of mill content results in higher efficiency.

Overflow VS Grate Discharge Ball or Mill Why RetrofitGrate Discharge Ball mills with low pulp levels benefit from the full impact of the overflow type; the End. high efficiency grate discharging ball mill. Grinding in Ball Mills: Modeling and Process Semantic Scholar. overflow discharge mill, diaphragm or grate discharge mill and centre ...

Grate-discharge Type 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. Compartment type

grate discharge ball mill picture Grate Discharge Advantage & Benefits - Grinding . As secondary ball mills are usually fed a relatively (compared to SAG mills) fine F80 and have high re-circulating loads and produce product fineness of the P80 - 100 to 160 micron range, fitting a grate discharge needs to be carefully considered.

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.,

Overflow VS Grate Discharge Ball or Mill - Why Retrofit. In the case of ball mills these are the overflow type, semi-grate or intermediate pulp level discharge, and the true grate. Chat Online. Overflow Discharge Ball Mill in Operation- Mineral Processing . Jun 12, 2015 . Overflow Discharge Ball Mill in Operation in a Rock-Phosphate Processing ...

May 24, 2018· There are two kinds of ball mill, grate type and overfall type due to different ways of Ball Mill OVER FLOW DISCHARGE,mining ball mill type overflow vs grateGrinding Mill mining ball mill …

Overflow VS Grate Discharge Ball or Mill Why Retrofit. The discharge end of the Grate Discharge Ball Mill has at least ten times the discharge opening area through the grate slots compared to the common trunnion overflow type mill The discharge grates are designed to run clean and free of any blinding or choking The pulp level in the mill may ...

Overflow VS Grate Discharge Ball or Mill - Why Retrofit. Grinding mills can by classified by which types of discharge the ball mill has installed to let out the ground slurry. Best is rapid change of mill content results in higher efficiency.