The Updates of Mining Experts on Devising Theory
5 July, 2013 at 2:50 am in Featured
Since 1893, for over 100 years, ball mill has been widely used in metallurgy, chemical industry, mine, cement, ceramics, medicine, construction and electric power industries. Dressing index depends on the quality of material to a large extent. If mineral liberation degree is not high, the selecting index will not be ideal. Coenobium without monomer separation will reduce the concentrate grade if it is classified into concentrate and will reduce the recycle rate of valuable mineral. On the other hand, minerals should not be over-crushed. Over-crushing not only increases power consumption, steel consumption, but also will worsen dressing index and hurt mineral recovery. Both power and metal consumption are relatively large in the grinding operation. The usual power consumption is about 6 to 30 kw/h/ton, which occupies 30-75% of the total consumption, sometimes reaches 85%. The consumption of grinding medium and lining board reaches 0.4-3.0 kg/ton. However, the fact that the ball mill is not washed out after so long time industrial application and development shows that from structure to working principle, the ball mill is basically reliable and reasonable and performance is also good.
Therefore, seeing from the importance of production and economic benefits, we should constantly carry out research to improve the grinding methods and technology, develop new equipment and new type wear resistant material to reduce the cost of ore processing, which will has important practical significance to reduce dressing cost and improve dressing index. It is also the reason why the ball mill research is taken seriously at home and abroad. Although it has certain shortcomings, to weed it out from the ore grinding process is quite difficult. In-depth study on ball mill in the future will still be very necessary and valuable because it will continue to be the main equipment in ore grinding.
Big materials are fed to the jaw crusher evenly and gradually by vibrating feeder through a hopper for primary crushing. After first crush, the material will transferred to impact crusher by belt conveyor for secondary crush; the crushed materials will then transferred to vibrating screen for separating. After separating, the parts that can meet standard will be transferred away as final products, while the other parts will be returned to impact crusher, thus forming a closed circuit. Size of final products can be combined and graded according to customer’s specific requirement. We can also equip dust catcher system to protect environment.