Optimized Solutions For Your Mine.
Address
Yantai Shangdong China

hydraulic ore dressing depending

hydraulic ore dressing depending

Concentration of Ores: Hydraulic Washing, Froth Flotation ...

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.

See full list on toppr

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 propertiesof 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 use this method on a large scale to remove their impurities. Learn the process of extracting Crude Metal from Concentrated Ore.

See full list on toppr

Another method of concentration of ores is the Froth Flotation Method. This is the process for concentration of primarily sulphide ores. It has the advantage over gravityseparation 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 water, oil and other substances. And rotating paddles will then agitate such mixture and introduce air. The air will cause bubbles to form, which attaches itself to the solid particles of minerals. And then a froth will form and it will rise to the top. This froth will contain the mineral particles which we can now separate. There are three main types of additives in this process, namely 1. Collectors: These increase the non wettability of mineral particles. Basically, they form a film on the particles which makes them water repellent....

See full list on toppr

Leaching is a chemical process of concentration of ore. Here the ore dissolves in a chemical solution. The minerals will react and dissolve leaving behind the impurities only which filter out. And then the metal will be obtained from the chemical solution. Let us now take a look at an example of how we obtain Aluminium by leaching.

See full list on toppr

The leaching of aluminium from its core bauxite on an industrial scale is known as the Bayer process. This process will give us the end product of Alumina from bauxite. The other impurities of silica, titanium oxide and varies other oxides will separate. The first step is to heat the bauxite ore to temperatures of 200°c along with a sodium hydroxide solution. This will convert the aluminium oxide to a solution of sodium aluminate. The silica will dissolve itself in the process. The chemical equation is Al2O3 + 2 NaOH 2 NaAlO2 + H2O From the above solution, we remove solid impurities by filtration. Then we bubble carbon dioxide through the aqueous solution of sodium aluminate to neutralize it. And aluminium hydroxide precipitates as a result. 2 NaAlO2 + CO2  2 Al3 + Na2CO3 + H2O This hydrated alumina is then heated to 1470 K. This gives us a pure form of aluminium hydroxide without the impurities. 2 Al3  Al2O3 + 3 H2O Read Uses of Aluminium, Copper, Zinc...

See full list on toppr

Strives to Provide the Optimized Solutions
for Your Mine!

Call Us +8615903396981
whatsapp
whatsapp