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Antimony Ore Dressing

Antimony Ore Dressing

Antimony ore beneficiation operation aims to separate and concentrate the mineral values from waste material, remove impurities, or prepare the ore for further refinement. Beneficiation activities generally do not change the mineral values themselves other than by crushing and grinding, or enlarging particle size to facilitate processing.

Antimony ore dressingAntimony belongs to chalcophile element, but also has certain oxytropism, has amphoteric element properties. The ions are mainly Sb3+, there are also Sb5+.  In nature, the main form of antimony is sulfide, minority forms sulfur oxides and sulphur salts.
The method of extract antimony ore from mine depends on the quality and composition of ore. Mostly antimony ore exist in the form of antimony sulfide ore. Low grade ore can use froth flotation enrichment, and high grade ore is heated to 500–600 °C to melt stibnite, and can be separated from gangue. Antimony can use iron from natural antimony to reduction and separation:
Sb2S3 + 3 Fe → 2 Sb + 3 FeS
Antimony trisulfide is more stable than antimonous oxide, so is easy to be transformed, and after roasting recover again into sulfide. This kind of material directly used in many applications, impurities may have the arsenic and sulfide. Extract antimony from oxyde can use carbon thermal reduction method:
2 Sb2O3 + 3 C → 4 Sb + 3 CO2
Low taste ore is reduced in the blast furnace, and high taste is reduced in the reverberatory furnace.

Antimony Ore Dressing

>>Antimony Ore Beneficiation Process

Antimony ore beneficiation operation aims to separate and concentrate the mineral values from waste material, remove impurities, or prepare the ore for further refinement. Beneficiation activities generally do not change the mineral values themselves other than by crushing and grinding, or enlarging particle size to facilitate processing.
The beneficiation process is completed by antimony beneficiation plant and includes many different stages of crushing, grinding, size classification, washing, filtration, sorting, washing, separation etc.

>>Antimony ore dressing methods:

Hand sorting
Antimony ore hand selected process is using the difference of antimony ore containing antimony minerals and gangue in color, luster, shape of the. Although this method is primitive, and the labor intensity is great, but for antimony ore beneficiation still has special significance. Because the antimony mineral are usually coarse monomer recrystallization or massive aggregate crystal output block antimony concentrate hand selected can often get the higher grade, requirements suitable for the vertical roasting furnace antimony metallurgy factory technology.

Gravity separation
Antimony Ore DressingGravity separation process of antimony ores
for most antimony ore dressing plant is applicable, because the antimony mineral belongs to high density, grain size, easy to coarse minerals by gravity separation method with gangue. Among them, stibnite ore belongs to the easy selection; stibiconite, antimony blende, antimony trioxide belonged to density separation easily ore; only water antimony calcium belongs to according to the density separation difficult ore dressing plant.

Flotation separation
Flotation is the most important antimony mineral extraction method. Antimony sulfide mineral belongs to the easy floating minerals, mostly using flotation method to improve ore crystal. Among them, often first antimonite lead salt as activating agent, but also useful for copper salt or copper salt and lead salt and then use the flotation. Common collector with butyl xanthate or shale oil and diethyldithiocarbamate mixture, foaming agent is pine oil or No. 2 oil. Antimony oxide ore belongs to difficult to float ore.

>>Antimony flotation separation equipments:

Antimony Ore Dressing

Based on different separation process, the antimony flotation separation equipment can be jigging machine and flotation machine. Flotation separation method for these antimony are mainly selection with hand, gravity separation and flotation method. For the beneficiation of complex antimony ore, two or three beneficiation combination processing are needed.

>> Features

Antimony ore beneficiation is relatively simple, and beneficiation process design shall be based on the ore physicochemical properties.

>> Technical Data

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