How to Improve Iron Ore Concentrate Grade
Choosing energy-saving, high-yield crushing equipment
Though there are many types of crushing equipment, it is not easy to make a right choice for the users. According to the surveys, as for some crushing equipment produced by certain companies, many users have confronted the problems such as the frequent replacement of hammerhead and liner in the crusher, the low production, high power consumption, maintenance difficulties and low equipment operation. For example, with regard to certain type of hammer crusher, the service life of the hammerhead is short. It needs replacing every 15 days for the long term. In addition, the power consumption will need as much as 7KWH by crushing one ton of ore. Compared with hammer crusher, a kind of cone crusher is featured with low consumption, long working time, high output, stable discharge granularity and low power consumption and so on. Its power consumption only needs 5KWH / tons of ore when compared with that of other crusher. Moreover, the life cycle of liner is improved to six months. It is elongated.
Choosing energy-saving, high-yield grinding equipment
The main bearings of the ordinary grinding ball mill currently used on the market are Babbitt bearings, which has large running resistance and high fuel consumption. In addition, the bearings of the large mill should be equipped with lubrication station, making it more difficult to conduct maintenance of the mill. At present, the energy saving ball mill is equipped with rolling bearings and the power consumption is also reduced to 18KWH. It adopts grease lubricating system, which can save more than 80% of the lubricating oil. Without lubrication station of the main bearing, repair and maintenance for one time is enough and the operation rate can reach 100%.
The liners of the ordinary ball mill are mainly in the shape of bars, the stepped and wave, whose shortcomings are that they are easy to bend and deform when reaching a certain thickness and they cannot be used any more. Another disadvantage is that the liner surface is simple and the contact area of the ball and liner is small, which result in that the grinding capacity is not enough, the grinding efficiency is low and the yield of the mill is not high. As for the double U-shaped liner, the advantage of this liner is that there is corrugation along the mill shell with circumferential direction and there is trench along the mill axis. When the mill is running, the larger contact surface between the grinding body and the liner improve the efficiency and output.