Iron ore beneficiation process skills
Author : RuiGuang Time : 2013-11-20 Click :
Magnetite beneficiation process , mainly occurs in iron ore magnetite skarn , mostly subhedral , anhedral granular structure , disseminated a dense disseminated output, crystal size more in 0.05 ~ 0.10mm so, aggregate particles of about 0.5 ~ 1.0mm . Magnetite beneficiation process , magnetite beneficiation process , magnetite beneficiation technology , the main ore body with stone rock and skarn , fragmentation medium-grained diorite, marble, granite porphyry , also a small amount of pyrite , chlorite altered rocks , hornfels , sub- andesite . Are easy sorting mineral beneficiation process is simple and relatively Burghardt ; test uses 55% -200 mesh magnetic method ( 1800 Oe ) for roughing iron , iron coarse concentrate regrinding to 75% -200 mesh magnetically selected , crude Select scavenger tailings ; make concentrate grade of 67% iron , iron recovery rate of 86% , the test results are satisfactory.According to the nature of the ore and the test results , the technical and economic comparison , Ruiguang magnetite beneficiation process design are: using two closed-circuit crushing ,-12mm product by conveyor belt to the fine ore bin , grinding for the next step to prepare , in belt conveyor tail pulley mounted on the magnetic wins its pre- selection, when the long lead-zinc ore ore entrainment into the next -step process can be avoided , resulting in a waste of resources and energy , but also a part of the waste rock abandon , improve grinding ore grade .
Iron ore processing equipment sorting using roughing, finishing , roughing, selection , sweep the election . Specific description is: grinding using a closed-circuit grinding to make up 55% -200 mesh pulp magnetically roughing ; coarse and fine grinding and then make up to 75% -200 mesh pulp twice a closed magnetic selection , so concentrate iron grade of 66% , cleaner tailings and rougher scavenger tailings returned together to concentrate the magnetic rougher to the mine ; that would ensure the grade of iron ore powder requirements , and can guarantee recovery . Finally beneficiation process design specifications for the 30% grade iron ore , iron ore concentrate grade of 66% , the recovery rate of 84%. Specific parameters have to wait before going into trial production - further modification.