in large enough quantities in beach sands, rutile forms an important constituent of heavy minerals and ore deposits. miners extract and separate the valuable minerals – e.g., rutile, zircon, and ilmenite. the main uses for rutile are the manufacture of refractory ceramic, as a pigment, and for the production of titanium metal.
magnetite is a rock mineral and one of the main iron ores, with the chemical formula fe 3 o 4. it is one of the oxides of iron , and is ferrimagnetic ; it is attracted to a magnet and can be magnetized to become a permanent magnet itself.
the falcon ultra-fine uf centrifugal concentrator is primarily used for the separation of heavy minerals which occur in ore concentrations above 0.1% by weight, such as cassiterite, tantalum and scheelite when the majority of the particles are smaller than 75 µm. the machine generates forces up to 600 times the force of gravity 600 g's and uses a smooth-walled bowl for particle stratification with a pneumatically controlled rubber lip for heavy material collection.
gravity separation is the separation of two or more minerals of different specific gravity by their relative movement in response to the force of gravity and one or more other forces such as centrifugal forces, magnetic forces, buoyant forces , one of which is resistance to motion drag force by a viscous medium such as heavy media, water or, less commonly, air.
the most commonly used heavy liquids are bromoform, tetrabromoethane and sodium polytungstate solution. several other tools are available to separate the heavy mineral i.e. magnetic separators and wifley tables popular heavy mineral ratios. among the most used heavy mineral ratios are : the ztr index zircon-tourmaline-rutile ,
black sand is sand that is black in color. one type of black sand is a heavy, glossy, partly magnetic mixture of usually fine sands, found as part of a placer deposit.another type of black sand, found on beaches near a volcano, consists of tiny fragments of basalt.. while some beaches are predominantly made of black sand, even other color beaches e.g. gold and white can often have deposits .