After primary crushing the material is conveyed to the hopper of the secondary crusher by belt conveyor. The 'through' from the first screen goes to the secondary screen for further screening and separation of different products and Dust. From stockpiles the product is loaded into the trucks with the help of loaders and delivered at the point of use. The crushed material goes to the primary screen via the same belt conveyor (conveyor used to transfer the secondary crusher material). The dust is stored in hopper and directly unloaded into the truck. The 'oversize' from this screen goes to the tertiary crusher for crushing. The material is further crushed and transferred to the screen for first screening. The material is fed to the primary crusher via feeder. The products are discharged from the screen via conveyor belts to various stockpiles. It is unloaded into the primary crusher hopper.The raw material (Black Stone) from the mines consists of stones of various sizes from fines to large boulders.
Slag is really a partially vitreous by-product on the process of smelting ore to separate the metal fraction in the undesirable fraction. Ground granulated blast-furnace slag, also named slag cement, is created from iron blast-furnace slag; it is a nonmetallic hydraulic cement consisting primarily of silicates and aluminosilicates of calcium created in a molten condition concurrently with iron within a blast furnace. The molten slag at a temperature of about 1500℃ is swiftly chilled by quenching in water to kind a glassy sandlike granulated materials.
Kyanite is an important mineral used for the production of superduty refractory material mullite, used in various metallurgical and glass industries, except steel metallurgy as mullite refractory bricks are corroded by iron slag and are not highly resistant to metallic oxides.
The target grind size is around 80 per cent minus 45 μm depending on the ore and operating conditions.Magnetite ore is ground using AG mills followed by cobber magnetic separation and pebble milling of the magnetic concentrate. Application of more efficient grinding technologies developed in the last 20 years, including high pressure grinding rolls for fine crushing and stirred milling for fine grinding, has provided opportunities to further reduce the operating costs associated with grinding.
In the method described above, it is preferred that the mixture of unprocessed (non-ground) CaC03 and/or Ca(OH)2 is ground in a ball mill . It is also preferred that the grinding aid is added to the limestone or hydrated lime when the material still has a particle size in excess of 75 μιτι, preferably, wherein at least 98 wt.-% of the material has a particle size in excess of 75 μιτι.
The use of 40 µm bubbles and the coagulation or flocculation of particles to reach 7 µm were necessary to increase their recovery .Rulyov and coworkers evaluated the microfotation of particles below 1 µm.
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