Advertisements
Advertisements
प्रश्न
Explain the hydraulic separation method with a neat labelled diagram.
Advertisements
उत्तर
- This method is based on the working of a mill.
- It has a tapering vessel similar to that used in grinding mill. The tapering vessel opens up in a tank-like container that is tapering on the lower side. The tank has a water inlet on the lower side and a water outlet on the upper side.
- The powdered ore is released in the tank and forceful stream of water is introduced into the tank through the water inlet at the bottom.
- The lighter particles of the gangue are carried up by the water jet and pass out along with water flowing out from the outlet near the top and get collected separately while the heavier ore particles are collected at the bottom from the lower side of the tank.
- The reservoir is constructed in a conical shape so that the velocity of the water jet is reduced, thus preventing ore particles from being carried away along with the stream of water.
- This method is based on the principle of gravitation law, wherein particles of identical size are separated by their weight with the help of water.
Hydraulic separation method
APPEARS IN
संबंधित प्रश्न
Give the importance of the following for living beings:
Nitrogen
brown powder deposit on iron?
Name:
(a) the processes involved in
concentration :-
Explain the following terms:
(c) slag
`Ag2O`
................................
`2Pb(NO3)_2`
.........................
state the reactions at the two electrodes ?
what does it form with silica present in the ore?
Which metal is used for:
making face creams
Name a metal which forms a liquid alloy at ordinary temperature.
Complete the following flow chart and answer the questions below:
i) In which method pine oil is used?
ii) Explain what method of concentration in brief.
The following is a sketch of an electrolytic cell used in the extraction of aluminium :
(a) What is the substance of which the electrode A and B are made?
(b) At which electrode (A or B) is aluminium formed?
(c) What are the two aluminium compounds in the electrolyte C?
(d) Why is it necessary for electrode B to be continuously replaced?
What do you observe when hydrogen is passed over heated copper oxide?
In Wilfley table method to separate particles of gangue _______ method is used.
The chemical formula of zinc blend is _______.
Match the columns.
| Group A | Group B |
| 1. ZnS | a) Copper Sulphide |
| 2. HgS | b) Bauxite |
| c) Cinnabar | |
| d) Zinc blend |
Write the molecular formulae of the following compound.
Stannic oxide
Distinguish between:
Froth floatation - Leaching
The chemical name of rust is ______.
Calculate the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume at 27°C? (R = 2 cal K-1 mol-1).
