Final KB Qs Module 6: Density Based Separation

Question 1

Give the Density difference / concentration criterion formula.

Answer 1

Question 2

Name 5 Gravity separators.

Answer 2

1. Jigs
2. Spirals
3. Shaking tables
4. Dense Media
5. Centrifugal

Question 3

Draw and explain jigs.

Answer 3

Water is pulsed through the bed Heavy particles settle, passing through a grid/screen

Question 4

Draw and explain Spirals

Answer 4

High and low density particles are separated as they go down the spirals

Question 5

Draw and explain shaking tables.

Answer 5

1. Water transports material across a table
2. Riffles run perpendicular to the feed
3. Light particles travel over the riffles
4. Heavy particles stay at the bottom of the riffles
5. Shaking of the table transports the heavy minerals to the concentrate

Question 6

Draw and explain Kelson concentrator in 4.

Answer 6

1. Water injected from the water holes to “fluidize” this bed
2. Heavy minerals replace the light minerals
3. Heavy minerals are trapped in the riffles (concentrate)
4. Lighter minerals are carried by water to the top and flow out of the unit (tailings)

Question 7

Give G - Level formula and angular velocity formula.

Answer 7