What is semi-autogenous?
Mills that grind hard ores with fracture characteristics that do not lend themselves to fully autogenous milling are charged with a small amount of steel balls to assist in the size reduction. These are known as semi-autogenous grinding (SAG) mills. In the mining industry all of these types of mills are in use.
What is an autogenous mill?
Autogenous Mills operate, mechanically, similar to the ball mill. They differ in the media they use to break or grind the ore. Autogenous Mills use large particles of ore instead of steel or other balls for grinding media. Autogenous mills use large pieces of ore as grinding media.
What is the difference between AG mill and SAG mill?
SAG mills have a higher installed power density for a given plant footprint relative to AC mills. With the combination of finer grind and a lower installed power density (based on the lower density of the mill charge), a typical AG mill has a lower throughput, a lower power draw, and produces a finer grind.
What is ball charge in SAG mill?
If the ball charge rate is between 8-12%, it will be SAG mill. If it is more than this, it will be ball mill.
What is SAG milling?
SAG mill. SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also use grinding balls like a ball mill. A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%.
What are mill scats?
scats means material in a ball mill or sag mill that has become rounded and no longer susceptible to additional size reduction. Basically, this material may be rejected from the grinding circuit for additional crushing because it contributes to higher energy consumption within the mill.
What is an attrition mill?
The attrition mill is a device for mechanically reducing solid particle size by intense agitation of a slurry of material being milled and coarse milling media.
What is pebble crusher?
A semi-autogenous (SAG) or autogenous mills (AG) circuit commonly comprises a pebble (cone) crusher to deal with the critical size particles. The pebbles crusher is often oversized, and thus not fully utilized.
How can I make my SAG mill faster?
The energy storage capacity and processing speed can be increased by adding one of 3 tier of Capacitor into the upgrade slot. The energy consumed varies on the item processed. To increase the chance of getting a secondary output add a catalyst such as Flint or Dark Steel Ball.
What is critical speed of ball mill?
The formula for critical speed is CS = 1/2π √(g/(R-r) where g is the gravitational constant, R is the inside diameter of the mill and r is the diameter of one piece of media. This reduced to CS = 265.45/√(R-r).
What is a hig mill?
The HIGmill is the only ultrafine grinding technology in commercial use that can use small-size high-density grinding media in mill sizes above 3000 kW. On-line particle size optimization to maximize process efficiency. HIGmill offers a unique opportunity to optimize on-line product fineness.
What is a tumbling mill?
tumbling mill (plural tumbling mills) A machine, consisting of a drum that rotates on a horizontal axis, that grinds or pulverizes material mixed with a grinding material such as iron balls.
What is cone crusher?
A Cone Crusher is a compression type of machine that reduces material by squeezing or compressing the feed material between a moving piece of steel and a stationary piece of steel.
How to calculate ball mill speed?
The formula for critical speed is CS = 1/2π √(g/(R-r) where g is the gravitational constant, R is the inside diameter of the mill and r is the diameter of one piece of media.
What is ball to powder ratio?
The ball to powder ratio (BPR) is a processing parameter that is frequently used in both mechanical (ball) milling and mechanical alloying.
How does an IsaMill work?
IsaMill Operating Principles. The IsaMill is a stirred-medium grinding mill, in which the grinding medium and the ore being ground are stirred rather than being subjected to the tumbling action of older high-throughput mills (such as ball mills and rod mills).