How Is Sulphide Ore Concentrated?

Sulphide ores are concentrated by froth flotation process.

Which is the method used to concentrate sulphide ores?

froth flotation process
The principle of froth flotation process is that sulphide ores are preferentially wetted by the pine oil, whereas the gangue particles are wetted by the water. Hence the method used for the concentration of sulphide ores is froth flotation.

Are sulphide ores concentrated by distillation?

Sulphide ores are concentrated by Froth flotation method.

Why are sulphide ores concentrated by froth flotation?

This is because the sulphide ore particles are preferentially wetted by oil and gangue particles are preferentially wetted by water.

Which sulphide ore is concentrated by leaching?

Which one of the following sulphide ores offers an exception and is concentrated by chemical leaching? D. galena (Pbs), Copper pyrite (CuFeS₂) and argentite (Ag₂S) are concentrated by froth flotation process but sphalerite (ZnS) is concentrated by chemical leching.

Which of these is used for sulphide ores and why?

Roasting is the method used for sulphide ores. Roasting is used because it is easier to purify the oxides of a substance than the other ores. Therefore, sulphide ores are also heated strongly in the presence of excess oxygen to form its oxides.

Which of the following ore is concentrated by calcination?

sulphide ore
Concentration of sulphide ore is done by the calcination method.

How is bauxite concentrated?

Hence, Bauxite ore is concentrated by Leaching. Gold, silver are also extracted from their native ores by Leaching.

How are haematite ore is concentrated?

Haematite ore is a combination of Iron and oxide and also it is a heavy mineral oxide. Hence, gravity separation is used. ∴ Haematite ore is concentrated by “Gravity separation method”.

Which of the following ore is concentrated by chemical leaching method?

Among galena (PbS), copper pyrites (CuFeS₂), cinnabar (HgS) and argentite (Ag₂S) argentite being silver ore is concentrated by chemical leaching method.

Which type of ores are concentrated by froth flotation method?

Types of ores that can be concentrated by froth flotation method are sulphide ores. Examples are PbS (sulphide galena) and ZnS (zinc blende).

Which ore is best concentrated by froth flotation?

Galena
In the given options, Galena (PbS) being a sulphide ore is concentrated by froth floatation process.

How are sulphide ores purified?

A blast of compressed air is blown through the pipe of a rotating agitator to produce froth. The sulphide ore particles are wetted and coated by pine oil and rise up along with the froth (froth being lighter). The gangue particles wetted by water sink to the bottom of the tank (water being heavier).

Which sulphide ore is not concentrated by froth flotation method?

Pyrolusite (MnO2 is not concentrated by froth floatation process.

How is Argentite concentrated?

Argentite is a type of sulphide ore and is concentrated by the froth flotation process.The concentrated ore is treated with 0.4% to 0.7% Solution of cyanide and therefore the current of air undergoes it.

Which of sulphide ore offers exception and is concentrated by chemical leaching?

Which of the following sulphide ores offers an exception and is concentrated by chemical leaching ? Argentite.

Why is roasting carried in sulphide ores?

Roasting is used for sulphide ores because to remove the sulphur as it gets escaped in the form of gas.

When a sulphide ore is roasted the product obtained is usually?

During roasting, the sulfide is converted to an oxide, and sulfur is released as sulfur dioxide, a gas.

Why roasting is used for sulphide ores and not on carbonate ores?

In case of carbonate ores, we need to eliminate the carbonate and moisture. So, the ore is heated to high temperatures in the absence of air. Carbon, which is in its highest oxidation state, cannot be oxidised further.So, roasting is not done for carbonate ores, moreover calcination is more difficult that roasting.

How is cassiterite concentrated?

Cassiterite or tin stone (SnO2) is non-magnetic and found associated with magnetic impurities. Thus, it is concentrated by electromagnetic separation.

Is calcination a concentration technique?

(a) Calcination: Calcination is a process in which the ore are usually carbonate or hydrated oxide is subjected to the action of heat in order of expel water from hydrated oxide and carbon dioxide from a carbonate. Calcination is generally done in a reverberatory furnace.