Question

which of the ores mentioned in can be concentrated by magnet separation method?

Answer 1

Ores in which one of the components(either the impurity or the actual ore) is magnetic can be concentrated, e.g., ores containing iron (haematite, magnetite, siderite and iron pyrites).

Answer 2

Ores like Haematite, Magnetite and Iron Pyrites can be concentrated by the magnetic separation method.

Explanation:

• The ores are "paramagnetic", to get a fine ore of hematite by magnetic separation.

• This will "decrease with decreasing particle size" because the magnetic susceptibility of magnetic particles "decreases with a decrease in particle mass".

• The process of magnetic separation is a straight forward one. The ore which is finely ground and crushed is placed on a constantly moving roller.

• This roller is magnetic in nature. Now when the finely ground ore reaches the end of the roller it is met with two baskets which are situated at a distance from each other.

• The unwanted particles in the ore which aren’t magnetic fall into the basket which is further ahead of the roller.

• The ore particles which are needed and are magnetic in nature stick to the roller for a longer time and when they are turned upside down beneath the roller, the fell into the basket placed for accumulating the wanted ore particles.

• This process is repeated until all the ore particles are extracted. This is done for a variety of ores which are given above.

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