Non-ferrous metals refer to all metals except iron , chromium and manganese . Non-ferrous ore comprising: a copper ore, lead zinc ore, tungsten ore, molybdenum, nickel, bauxite, tin ore, antimony, mercury ore, cobalt ore, bismuth, magnesium ore, and the like.
First, the classification of non-ferrous metals
Non-ferrous metals are classified into heavy metals, light metals, precious metals, and rare metals.
Heavy metals: general density above 4.5g/cm3, such as copper, lead, zinc, etc.;
Light metal: low density (0.53 ~ 4.5g / cm3), chemically active, such as aluminum, magnesium and so on.
Precious metals: less content in the earth's crust, difficult to extract, high price, high density, stable chemical properties, such as gold, silver , platinum, etc.;
Rare metals: such as tungsten, molybdenum, germanium, lithium, lanthanum, uranium and the like.
Second, the method of mineral processing
The various minerals in the ore have their own inherent physical and chemical properties, such as: particle size, shape, color, gloss, specific gravity, friction coefficient, magnetic properties, electrical properties, surface wettability, and the like. Depending on the nature of the various minerals, different beneficiation methods can be chosen to allow them to be sorted. The most commonly used beneficiation methods are re-election, flotation, magnetic separation, electro-election, chemical beneficiation, photo-selection, friction selection and hand selection.
Third, the beneficiation process
The beneficiation process can be divided into three stages: preparation before sorting, sorting and dehydration after sorting.
1. Prepare the work before the selection. This includes crushing and sieving, grinding and grading of ore.
2. Sorting the work. Depending on the nature of the mineral, one or more methods of beneficiation, such as flotation, re-election or magnetic separation, are used. It is the separation of dissociated useful minerals from gangue minerals (or different useful minerals).
3. Dehydration work after sorting. Concentrate dewatering usually consists of three stages of concentration, filtration and drying. The purpose is to remove the water from the concentrate for storage, transportation and sale. After the ore is sorted, several products can be obtained: concentrate, tailings and medium ore.
The above is a brief introduction of the red star machine for the non-ferrous metal beneficiation method and the beneficiation process. More details will be provided later, and you can also consult the Red Star machine for more information.
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