Related Questions

Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?
A Cresylic acid
B Xanthaies
C Pine oil
D All of the above
Pine oil and cresylic acid are used as __________ in the froth floatation process.
A Frother
B Collector
C Depressor
D Conditioner
Pine oil used in froth floatation technique acts as a/an
A Collector
B Modifier
C Frother
D Activator
Xanthates are used in the froth floatation process as a/an
A Conditioner
B Frother
C Collector
D Activator
Froth floatation process to concentrate the minerals is applicable to
A Calamine
B Chalcopyrites
C Bauxite
D Haematite
Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator?
A Cresylic acid
B Copper sulphate
C Calcium carbonate
D Sodium carbonate
Froth floatation is used for
A [

A. Washing fine coal dust (

B. Washing lump coal (> 80 mm size)

B Removing ash from the coal based on difference in specific gravity of coal and ash
C All of the above
In froth floatation, chemical agent added to cause air adherence is called
A Collector
B Frother
C Modifier
D Activator
Role of a "collector" in froth floatation is to
A Form a water repelling film on the mineral surface
B Create and stabilise the froth
C Act as a surface
D Collect the minerals according to their specific gravity
Ore concentration by froth floatation utilises the __________ of ore particles.
A Density difference
B Wetting characteristics
C Terminal velocities
D None of these

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