Chemistry, asked by amartyasrimani2708, 1 year ago

Ores of both zinc and mercury are solphide ores.Explain the methods used to extract these metals from their ores

Answers

Answered by meenusachan198p75yc9

Froth Flotation Process - Another method of concentration of ores is the Froth Flotation. This is the process for concentration of primarily sulphide ores. It has the advantage over gravity separation because it can collect even the extremely fine particles of minerals. The process uses the difference in the wetting characteristics of minerals and gangue. Minerals are generally wetted by oil and gangue is wetted by water. So, they prepare a mixture of the crushed ore with the water, oil and other substances. And rotating paddles will then such mixture and introduce air. The air will cause bubbles to form, which attaches itself to the solid particles of minerals. There are three main types of additives in this process namely,

Hydraulic Washing - This method is based on the differences in weight between the gangue and metal. Generally, the metal particles of the ore are heavier than the impurities. So we use the principle of gravity separation to separate. Here crushed ore is mixed with an upward stream of running water. The lighter particles of 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.

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