Gravity separation and flotation process for pyrite

Gravity separation and flotation process for pyrite

Pyrite is a general term for sulfide minerals of iron, generally including pyrite, pyrrhotite, and white iron. Pyrrhotite is the most common, pyrrhotite is rare, and white iron is extremely rare. The beneficiation process of pyrite can be divided into three types: single flotation, single gravity separation, and gravity flotation combined method; Single flotation is mainly used to treat pyrite with finer embedded particle size; Single re selection is suitable for processing coarse-grained embedded pyrite ores; The combined process of re selection and flotation is used to treat pyrite with uneven particle size distribution.

Gravity separation+flotation process: After crushing and grinding, the ore is first subjected to gravity separation and tailings disposal, while the coarse concentrate continues to undergo flotation separation.

The combined process of gravity selection and flotation is suitable for pyrite with uneven particle size distribution or easy to break and grind. The combined process of re selection and flotation generally involves rough grinding and classification of the raw ore, using appropriate re selection equipment to separate and obtain a portion of the pyrite concentrate. Then, suitable flotation processes are used to flotation or re grinding and re selection of the re selected intermediate ore and tailings.

Process characteristics: high comprehensive recovery rate and high concentrate grade.

Typical beneficiation plant

Guizhou pyrite, the main mineral in the ore is pyrite, with small amounts of white iron and brown iron; The main gangue minerals are kaolinite, hydromica, quartz, etc. The specific process is as follows: