Gravity Separation & Concentration Methods

Gravity Separation & Concentration Methods

  • To participate in the 911Metallurgist Forums, be sure to JOINLOGIN
  • Use Add New Topic to ask a New Question/Discussion about Gravity Separation/Concentration.
  • OR Select a Topic that Interests you.
  • Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent).
    Using Add Reply allows you to Attach Images or PDF files and provide a more complete input.
  • Use Add Comment = to comment on someone else’s Reply in an already active Topic/Discussion.

Dense medium processing for coal (1 reply)

Millza79
3 months ago
Millza79 3 months ago

Hi all,

What is the lowest DMC medium SG that is realistically possible in a coal prep plant and why?

SmartDog
3 months ago
SmartDog 3 months ago
1 like by David

The dense media specific gravity is based on the amount of medium that is suspended in the water.  So the answer to your question is obviously 1.0 which is when you have no media added.  In effect this is how a jig works.  But in actual fact the density of the media will never reach 1.0 due to circulating fines and other factors. 

If you are actually asking what is the lowest realistic specific gravity you can use and control to, that depends on the type of media you are using and the physical characteristics of it.  Also the design of the media system to include screens, magnetic separators (assuming magnetite or ferro silicon).  A properly designed media system can usually control the media specific gravity to within 0.01+/- of a desired gravity.

Then you need to consider the characteristics of the coal.  Coal being made up of several different  coal type minerals (sometimes called macerals (probably showing my age with that)), and several types of waste the best separating gravity is determined by the cleaned coal specifications you want to achieve.

 

Please join and login to participate and leave a comment.