4 beneficiation processes to obtain aluminum from bauxite | fote machinery
products are one of the most widely used metals. The current output and
consumption of aluminum (in tons) is second only to steel and has become the
second-largest metal for human application.
is mainly used to extract aluminum. About 85% of bauxite can be refined into
alumina and then smelted into aluminum, 8% for chemical alumina, and 7% for
refractory materials, proppants, and cement.
washing is the simplest and most effective method to improve the bauxite
aluminum-silicon ratio by about 2 times. But you need to combine the ore
washing process with other methods including classification -Manual selection
3Control the concentration of the pulp,
parameters of the classification equipment to achieve the separation of coarse and fine particles, and reduce the lower limit of recycled particle size.
1Because collecting agent contains the surface-active substances, the foam of each operation of bauxite flotation is very sticking and big-volume. So, the general quantity of water will consume alarge amount of foam flushing waters, finally reducing the concentration of the flotation system.
In addition to aluminum and iron minerals, high iron bauxite is also accompanied by valuable metals such as gallium and vanadium, of which Ga content is 0.0044% ~ 0.0070%, V205 content is 0.148% ~ 0178%.
1However, the content of aluminum and iron is relatively low so that whether it is a single aluminum ore or a single iron ore, it is difficult to meet the basic requirements of industrial applications.
2Besides, the iron and aluminum minerals are embedded in a very fine grain size. Most
minerals are poorly crystallized, some are colloidal and cemented with each other, and the embedding relationship is extremely complicated.
The chemical method means that we should fully dissociate aluminum minerals and silicon minerals in bauxite. The physical method uses classification equipment for bauxite concentrate. Outstanding features of the combination of the two ways:
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