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Rod/Ball Mill

$529.00 - 4,548.00

MACSALAB Rod / Ball Mill Vessels are available in Grade 304 and 316 Stainless Steel, Rubber - lined Mild Steel as well as Ceramic (Alumina).

Rods are available in Stainless Steel and Arlicite.

Grinding Spheres (balls) are available in Steel, Zirconia and Alumina. Quantity and sizes to client’s specifications.

 

5 Litre

10 Litre

30 Litre

Flange - Outer Diameter

230 mm

292 mm

392 mm

Internal Diameter

160 mm

200 mm

300 mm

Overall Length

250 mm

320 mm

450 mm

                                                   

MACSALAB Drive Rolls for Rod / Ball Mills are Rubber coated and manufactured in Double and Triple Roll models. The Rolls are 120 mm diameter x 1200 mm long and powered by a 0.37 KW 220 Volt Motor with a variable speed controller.

Ball/Rod mill Literature

 

The Ball/Rod mills are meant for producing fine particle size reduction through attrition and compressive forces at the grain size level. They are the most effective laboratory mills for batch-wise, rapid grinding of medium-hard to very hard samples down to finest particle sizes.

 

A horizontal rotating cylinder (vessel) is partially filled with balls/rods (grinding media), usually stone or metal, which grinds material to the necessary fineness by friction and impact with the tumbling balls/rods. A rotating drum throws material and balls/rods in a counteracting motion which causes impact breakage of larger particles and compressive grinding of finer particles. Attrition in the charge causes grinding of finer particles.

These units are primarily used in the gold, copper and platinum industries with applications also in the lead, zinc, silver, alumina and nickel industries

Factors affecting grinding efficiency:

  • Amount of material
  • Amount of grinding media
  • Speed of the Mill

Some guidelines for Steel and rubber lined vessels are given in the table below.

Volume

Recommended

Batch size

Quantity of grinding media

O.D (mm)

Recommended

Vessel Speed

5 Litres

1.25 Litres

2.5 Litres

230

54-69rpm

10 Litres

2.50 Litres

5.0 Litres

292

49-62rpm

30 Litres

7.50 Litres

15 Litres

392

42-54rpm

Additional information

Try to limit the size of the batch to 25% of the total vessel volume which is sufficient to fill the voids and slightly cover the grinding Media. Any larger batches cause the balls to spread out throughout the mass of solids so they cannot make effective contact with each other, because of the layers of material between them. This greatly reduces the grinding efficiency of the mill and in some cases makes it impossible to attain the desired results.

The only occasion for larger batches than 25% of total volume, is on products that are soft and easy to grind and the grinding media do not have to make close contact with each other.

The Feed size should preferable be 8 mesh or smaller, although many operations start with much larger pieces. Having the feed material as fine as possible enables the use of smaller sizes of grinding media, which are always best for fine uniform grinding and dispersions. For hard material it is especially advantageous to start with a fairly fine product.

For most efficient results the mill should be at least half filled with grinding media.

Pebbles may be used where product contamination by iron from steel balls must be avoided.

 

The following rules should be carefully adhered to regardless of the type of grinding medium used:

  • There should be enough material to cover the grinding media
  • Grinding time must be watched carefully to avoid excessive grinding
  • The smallest grinding media should be employed. They not only reduce the danger of overheating but, provide faster and better results.

 

When steel balls are used the optimum sizes recommended are between 12.7 and 16 mm but sizes as small as 6.35 mm will give exceptional fine grinds.

Product Table

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Item Name Part Number Description Price  
DRIVE ROLL DOUBLE ROLL ROD/BALL MILL L14.000 Double Roll Drive Rolls for Rod / Ball Mill Vessels complete with:
• Rubber coated rolls 120 mm dia x 1200 mm long
• 0.37 kW Motor
• Variable speed between 120 & 154 rpm
$4,098.00 USD Add
DRIVE ROLL TRIPPLE ROLL ROD/BALL MILL L14.001 One (1) only x Triple Roll Drive Rolls for Rod / Ball Mill Vessels complete with:
• Rubber coated rolls 120 mm dia x 1200 mm long
• 0.37 kW 220 V Motor
• Variable speed between 120 & 154 rpm
$4,775.00 USD Add
VESSEL 10 LITRE M/S ROD MILL L14.002 VESSEL 10 LITRE M/S ROD MILLRod / Ball Mill Vessels include removable top lid with knobs and release handle $746.00 USD Add
VESSEL 10 LITRE S/S 304 ROD MILL L14.003 VESSEL 10 LITRE S/S ROD MILLRod / Ball Mill Vessels include removable top lid with knobs and release handle $1,405.00 USD Add
VESSEL 20 LITRE M/S ROD MILL L14.004 VESSEL 20 LITRE M/S ROD MILLRod / Ball Mill Vessels include removable top lid with knobs and release handle $1,009.00 USD Add
VESSEL 20 LITRE S/S 304 ROD MILL L14.005 VESSEL 20 LITRE S/S ROD MILLRod / Ball Mill Vessels include removable top lid with knobs and release handle $1,885.00 USD Add
VESSEL 30 LITRE M/S ROD MILL L14.006 VESSEL 30 LITRE M/S ROD MILLRod / Ball Mill Vessels include removable top lid with knobs and release handle $1,167.00 USD Add
VESSEL 30 LITRE S/S 304 ROD MILL L14.007 VESSEL 30 LITRE S/S ROD MILLRod / Ball Mill Vessels include removable top lid with knobs and release handle $2,156.00 USD Add
VESSEL 5 LITRE M/S ROD MILL L14.008 VESSEL 5 LITRE M/S ROD MILLRod / Ball Mill Vessels include removable top lid with knobs and release handle $555.00 USD Add
VESSEL 5 LITRE S/S 304 ROD MILL L14.009 VESSEL 5 LITRE S/S ROD MILLRod / Ball Mill Vessels include removable top lid with knobs and release handle $991.00 USD Add
VESSEL 7 LITRE S/S 304 ROD MILL L14.010 VESSEL 7 LITRE S/S ROD MILLRod / Ball Mill Vessels include removable top lid with knobs and release handle $1,068.00 USD Add