Laboratory Testing & General Mineral Processing Engineering

Laboratory Testing & General Mineral Processing Engineering

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PGM Plant Head Sample (3 replies)

Rahil Khan
8 years ago
Rahil Khan 8 years ago

I need some advice, in a PGM plant which one of the plants feed; mill feed or the PRF grade is the more accurate grade to determine the head grade?

(unknown)
8 years ago
(unknown) 8 years ago
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It will depend on what you mean by plant feed, mill feed and what PRF (?) are defined as and how they are sampled. Can you give some more information on each measurement point (particularly particle top-size and method of sampling)?

(unknown)
8 years ago
(unknown) 8 years ago
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The stream that has the least time-wise variation in grade and the smallest particle size is the best to sample long as you can get a 'correct' sample from the stream. The mills will provide some mixing/residence time that will assist in flattening the grade variation, so downstream of the mills is the place to sample, as long as you get only real fresh feed and no recycle streams (such as if the mill is in closed circuit).

O
OberstGruppen
8 years ago
OberstGruppen 8 years ago
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I would suggest that the head grade to a PGM concentrator should be measured at the feed to your first stage milling depending on the configuration of the concentrator i.e. MF, MF2 etc. If you head grade sample is for metallurgical accounting then it should be the fresh feed to the concentrator before any recycled streams are added.

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