|
|
Post by galvin on Apr 5, 2006 7:29:24 GMT
When spirals are used to produce a heavy mineral concentrate from a mineral sands feed, fluidized beds are often used to elutriate out the fine silica sand, and hence upgrade the mineral sands concentrate.
What is the typical solids throughput achieved when a fluidized bed is used in this way. Is a throughput of about 3 tonne solids per square metre per hour a reasonable estimate. Let's assume the lower size of the heavy minerals is about 90 microns and the density is RD 3.3.
|
|
ajohnston
New Member
Transmin Metallurgical Consultants
Posts: 24
|
Post by ajohnston on Apr 5, 2006 22:37:08 GMT
Galvin,
It's all down to Stoke's Law give and take a few adjustments. You can use thickening tests and hydraulic overflow sizing of thickeners as a reference.
I calculate a rise rate of about 800 m³/m² to get your separation. This has to include the water that comes in with the feed and the extra fluidization water.
Using 16% feed solids and very little fluidization water you get 10 t/h-m² to the sink fraction.
Good luck and there's no warranty on this info,
Adam
|
|
|
|
Post by veerendra on Aug 27, 2007 13:08:35 GMT
Dear Sir Can I Know what is 3 tonne solids per square metre ? Thanks  When spirals are used to produce a heavy mineral concentrate from a mineral sands feed, fluidized beds are often used to elutriate out the fine silica sand, and hence upgrade the mineral sands concentrate. What is the typical solids throughput achieved when a fluidized bed is used in this way. Is a throughput of about 3 tonne solids per square metre per hour a reasonable estimate. Let's assume the lower size of the heavy minerals is about 90 microns and the density is RD 3.3. |
|
