Technical Parameters of Laboratory BLL Glass Fibre Reinforced Plastic Spiral Chute
Laboratory BLL Glass Fibre Reinforced Plastic Spiral Chute is applicable for separation of fine-grained ( including micro-grained ) metallic minerals such as iron, ilmenite ,chromite, tungsten-tin ore, niobium-tantalum ore, gold placer, seashore monazite, rutile and zircon as well as other metallic and non-metallic minerals with adequate difference of specific gravity. The product is made by the only manufacturer designated by the former Ministry of Geology and Mineral Resources, in compliance with the Industrial standards.
The effective range of separation of size fractions: for the chutes of¦µ600¡¢¦µ400, separation of size fraction ¡Ü0.03 mm; for roughing , cleaning and scavenging, spiral chute should selected in response to their respective parameters.
Spiral Chute is to make separations of useful minerals from gangues by use of the different particles subject to gravity, hydraulic pressure and friction in the multi-force field through dynamic centrifugal flowing membrane of slurry produced on the inclined surface of spiral based on the differences of useful mineral and gangue in specific gravity, particle size and shape. Water in the spiral chute runs downward spiral movement and also flows in circulation transversely. Water in the upper layer run fast, generating centrifugal force with large inertia to toss toward the outer edge of the chute. Back-flow of water in the lower layer adjacent to the chute bootom runs slowly with small centrifugal force and flows from the outer edge to the inner edge with the action of gravity, generating secondary back-flow. Particles of heavy minerals in slurry settle rapidly and gradually moves toward the inner edge along the converged helix prior to finally being produced as concentrate. Light minerals settle slowly and flow fast in the surface layer of ore flow with large centrifugal force and gradually move toward the outer edge along the expanding helix before finally being produced as tailings.
|
Model |
Uite |
BLL-¦µ600 |
BLL-¦µ400 |
|
Screw diameter |
mm |
¦µ600 |
¦µ400 |
|
Spiral size |
mm |
360 |
240 |
|
Spiral in the first few |
(head
) |
1 |
1 |
|
Each of the first few laps |
(circle
) |
5 |
5 |
|
Feed size |
mm |
¡Ü0.3 |
¡Ü0.3 |
|
Feed density |
% |
20-40 |
20-40 |
|
Capacity |
t/h |
0.8-1.2 |
0.1-0.2 |
|
Overall dimensions |
mm |
700¡Á700¡Á2750 |
460¡Á460¡Á1500 |
|
Weight |
kg |
90 |
60 |
Structure
The glass fiber reinforced plastic spiral chute consists of feeding equipartition device, feed chute, spiral slice, product intercepting trough, feeding hopper, and trough support. The spiral chute is formed after five circles of glass fiber reinforced plastics helical blade (360¡ã for every circle) are connected with bolts. It is also fixed on the support. According to the needs of user, if it is permitted by the height of screw pitch, one, two, three or four spiral chutes can be installed respectively for every spiral chute. The separating materials are fed to each feed chute through the feeding equipartition device, and then slowly flow into each chute for separation. The valve block at the end of the spiral chute divides the already separated ore flow into several types (such as concentrate, middling, minor middling, and tailing) according to grades.
