Mine Ball Mill Application:
A ball mill grinds ores and other materials to a typical product
size of 35 mesh or finer.
The feed to a ball mill is prepared by...
· Single or multistage crushing and screening
· Crushing, screening, and/or rod milling
· Primary crushing and autogenous/semiautogenous grinding
Mine Ball Mill Normal feed sizes:
· 80% passing 1/4" (6 mm or finer) for hard ores
· 80% passing 1" (25 mm or finer) for softer ores
(Larger feed sizes can be tolerated depending
The length to diameter ratio of cylindrical mills range from 1 to 1
through 3 to 1. When the L/D ratio is 2 to 1 or greater, werefer to
the mill as a Tube Mill.
The two most popular types of ball mills are…
Grate or Diaphragm Discharge Ball Mill
In the discharge end of this mill, a slotted full diameter or
partial diameter grate with discharge lifter assembly conveys the
material to the discharge trunnion opening. The grate serves to
retain balls, tramp, and coarse material. A gradient created
between the feed opening and the discharge slots eases the flow of
material.
Trunnion Overflow Discharge Ball mill
A trunnion overflow mill has an open discharge end. Material flows
through the trunnion as a result of the pulp gradient between the
feed and discharge openings. A reverse helix in the discharge
trunnion liner retains balls in the mill.
LUOYANG ZHONGTAI Ball Mill Feature
The cylindrical mill adopts the driving type edge-driving,
center-driving, edge-driving with multi-point meshing, etc; driven
by asynchronous motor +reducer +pinion and gear as well as
synchronous motor +
air lclutch + pinion and gear.
Generally supported by static-dynamic pressure bearing on both
ends. Fuuly closed self-aligning 120º osculation rocker bearing is
used. Also single or double slipper staic- dynamic bearings can be
used. The bush is made by NC machine. The large open gear is designed using AGMA standard, Equipped with
reliably sealed gear housing and grease ahtomatic spraying
lubrication system.
The shell is key part of a mill. Carry out finite element analysis
on it with computer to ensure the reliable operation;
The shell is automatically welded, ultrasonic inspected, wholly
annealed and machined by large special machine tools on one
chucking; there special seal on static-dynamic connection parts ,
ch as feed and discharge hoper, trunnion, etc, to prevent oil and
slurry leakage;
The liner is of wear-resistance material mad by our company, wich
has been specially heat-treated, with high hardness and long
service life. Also other wear-resistance casting or rubber liner
can be used;
There are slow speed drive for medium and large mill;
The high and low pressure lubricating station is equipped for
medium and large mill;
The control and protection system is controlled by PLC. |
