Question

Explain some physical methods for concentration or dressing ore?
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Answer 1

some physical methods for concentration or dressing ore :

• The physical or chemical parcels of the gangue and ores determine the system employed to prize them from the ore.
• Ore attention can be fulfilled through a variety of styles, including hydraulic washing, glamorous separation, head flotation, and filtering.
• The coming sections go through some of the processes used to concentrate the ore.
• These are some physical methods of concentration of ore.

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Answer 2

Answer:

1. Hand-picking
2. Washing with Hydraulics
3. Process of Froth Floatation
4. Separation by magnetism

Explanation:

The following are the many processes for concentration of various types of ores:

1. Hand-picking: It was the old method of concentrating ore directly with the hands. The gangue or adhering solid matrix is removed from the ore using a hammer in this method. The separation and identification of gangue is based on variances in colour or lump form.
2. Washing with Hydraulics: The lighter gangue particles are separated from the heavier metal ore when the ore is passed through an upward stream of water. This is a gravity-based method of separation. This technique is used to enrich ores that are heavier than the gangue particles present. This method involves running a stream of water through crushed and finely powdered ore. The lighter gangue particles are washed away by water, leaving the bigger ore particles behind. Tin and lead oxide ores are concentrated using this method.
3. Process of Froth Floatation: This method is used to separate gangue from sulphide ores. To make a suspension, the ore is pulverised and combined with water. This is supplemented with collectors and froth stabilisers. Pine oils, fatty acids, and other collectors increase the metal component of the ore's non-wettability, allowing it to form a froth. The foam is kept flowing by cresols, aniline, and other froth stabilisers. The metal is lubricated by the oil, while the gangue is lubricated by the water. The froth is formed by using paddles and air to constantly stir up the suspension. The frothy metal is skimmed off the top and dried to recover the metal.
4. Separation by magnetism: Magnetic properties of either the ore or the gangue are utilised to separate the ore and gangue. Before being delivered on a conveyor belt that passes over a magnetic roller, the ore is carefully processed. While the magnetic ore remains on the belt, the gangue slips away. This technique is used to concentrate magnetic iron ores such as magnetite, chromite, and manganese by removing non-magnetic impurities (pyrolusite). This process makes use of a magnetic separator.