Cone crushers are one of the workhorses of the mining and aggregate industries. They are used as secondary crushers to reduce large rocks and ore of medium hardness into smaller more easily managed pieces. Cone crushers work by funneling large rocks from the top of the crusher onto a round cone. This cone is ground against an inverted bowl, similar to a mortar and pestle, such that large pieces of ore are crushed and allowed to fall into smaller and tighter levels of the cone until the smallest pieces eventually fall free.
Each cone crusher model series is generally designated by a number which indicates the diameter of the cone in millimeters, thus the 900 series has a cone measuring 900 millimeters across the base.
900 Millimeter Cone Crusher
The 900 series cone crusher is available in three different models: coarse, medium and fine. The coarse model can process up to 269 tons of material per hour, breaking each piece from an initial size of 150 millimeters down to approximately 38 millimeters. The mid-range “medium” model is suitable for crushing 69 to 144 tons of material per hour down to a resultant size of 19 to 30 millimeters in diameter. The fine media crusher is usually a “short head” model used for crushing materials to less than 18 millimeters. It is capable of handling 61 to 95 tons of material per hour.
All three models are powered by electric motors generating 75 to 100 horsepower at a maximum speed of 630 revolutions per minute. Though these models are some of the smallest available, they aren’t lightweight. Each one tips the scales at a massive 10,500 kilograms and stand approximately 2.7 meters high.
1200 Millimeter Cone Crusher
Like the 900 series, the mid-sized 1200 series of cone crushers is divided into three models: coarse, medium and fine. The coarse model is capable of handling more than 460 tons of material per hour. When used for a medium grind, a 1200 millimeter diameter cone crusher is able to process between 102 and 216 tons of material per hour, depending on how large or small the resulting particles need to be. For the most finely ground materials, the short head model can handle 92 to 146 tons of ore per hour and discharge material measuring 9 to 30 millimeters in diameter.
Cone crushers in the 1200 size range are powered by motors that generate 125 to 150 horsepower and spin the main drive axle at 560 revolutions per minute. Though they are not the largest crushers, the 1200 series of crushers each weigh in around 19,940 kilograms and stand 3.2 meters tall.
1600 Millimeter Cone Crusher
1600 millimeter cone crushers are some of the largest available on the market today. They are usually only found with coarse grinding cones. Each is powered by an electric motor generating between 200 and 250 horsepower and which spins the primary axle up to 510 revolutions per minute. The average cone crusher of this size weighs more than 42,000 kilograms and stands over 3.8 meters high. Capable of handling up to 730 tons of material per hour, the 1600 can break down ore as large as 280 millimeters in diameter to coarse rubble measuring 64 millimeters or less.