Concenttrrattiing plant

The crude taconite is now roughly the size of a football or smaller. A series of conveyor belts continuously feed the ore into ten large 27-foot-diameter, semi-autogenous primary grinding mills. Water is added at this point to transport it (94 percent of the water is recycled, while the rest is lost through evaporation). Each primary mill contains several 4″ steel balls that grind the ore as the mills turn. When the ore is reduced to 3/4″ or less, it moves out of the mill in a slurry solution. The mill discharge is screened at 1/4″ on trommel screens attached to the mill. Germany crusher plant

Ore smaller than 1/4″ is pumped in slurry solution to the wet cobber magnetic separator, which begins the process of separating the iron from the non-iron material. The magnetic iron ore is then laundered in two slurry surge tanks while the non-magnetics (silica/sand) go to the tailings disposal area. Most of the material continues to be finely ground in one of five secondary ball mills, which are powered by electric motors ranging from 2,500 hp to 4,000 hp and are charged with 1-1/2″ chrome grinding balls. Fine grinding is achieved using these smaller mills, bringing the ore to a similar grind as that found in face powder. The screen undersize is then moved to hydroseparators, where silica is floated off the top. Dry mortar production line

The hydroseparator underflow is pumped to the finisher magnetic separators. Once again, the magnetic separators grab the iron and discard the silica and sand. Thus, the ore is “concentrated” by removing the waste materials. The concentrate from the separators is pumped to fine screening.Dry mix mortar production line