Question

hydraulic seperation method

Answer 1

An ore of a metal is an impure source, this means other than the metal it consists of many other impurities such as sand, grit, clay, rocks etc. These impurities are collectively known as gangue. Gangue is generally commercial valueless and we must separate it from the ore. This entire process is the concentration of ores or even dressing or benefaction.
Now there are numerous ways to carry out the concentration of ores. The correct method is chosen based on the physical and chemical properties of the metal. Let us take a look at some of the most common methods.
Learn the process of Refining the Metal.

Hydraulic Washing

This method is based on the differences in weight between the gangue and the metal. Generally, the metal particles of the ore are heavier than the impurities. So we use the principle of gravity separation to separate the two.
Here crushed ore is mixed with an upward stream of running water. The lighter particles of the gangue wash away in the running water. The heavier metal particles settle down and can be separated easily. We use this method for ores that contain lead and tin since these are relatively heavier.

Magnetic Separation

Just like we saw earlier, the physical properties of metals can allow us to separate them from the gangue. One such physical property is magnetic properties of metals. In this method of Magnetic Separation, we use the magnetic properties of certain metals to divide them from the non-magnetic gangue.
Here we place the powdered ore on a roller belt. One belt of this roller is a magnet. So the magnetic material attracts to the metal belt and stays on the belt. The non-magnetic gangue falls in a heap from the belt. Also, the reverse may be the case. The gangue may be the magnetic material in certain cases.
Iron ores and manganese ores are the main ones for which we use magnetic separation. Magnetite and Chromitite ores (both iron ores) use this method on a large scale to remove their impurities.

Answer 2

Answer:

Hydraulic separation method is based on gravitation.

The heavy particles of ores can be easily separated from the light particles of gangue by the gravitational method.

Explanation:

Hydraulic separation method :

Construction:

1. The hydraulic separation method is based on the working of a mill.

2. There is a tapering vessel similar to that used in a grinding mill.

3. It opens in a tank-like container that is tapering on the lower side.

4. The tank has an outlet for water on the upper side and a water inlet on the lower side.

Working:

1. The finely ground ore is released in the tank.

2. A forceful flow of water is introduced in the tank from the lower side.

3. Gangue particles are lighter and hence they flow out along with the water jet from the outlet on the upper side. And they get collected separately.

4. At the same time the heavy particles of the ore are collected at the bottom from the lower side of the tank.

In short, this method is based on the law of gravitation, wherein particles of the same size are separated by their weight with the help of water.