Phosphate ore separation process - application of flotation and double reverse flotation

Depending on the properties of phosphate rock, phosphate rock separation processes include flotation, scrubbing and desliming, gravity separation, chemical leaching, multi-process combined separation, photoelectric separation, magnetic separation, etc. Among them, flotation is the most used, including direct flotation. Selection, reverse flotation, forward and reverse flotation. Flotation and double reverse flotation.

The phosphate ore flotation process is suitable for phosphate ores with complex ore texture, complex ore occurrence relationships, fine particle size, closed embeddedness, mixed symbiosis, and difficult monomer separation.

1. Direct flotation process

Direct flotation uses effective inhibitors to control gangue minerals and collectors to enrich phosphorus in the foam. It is mostly used in low-grade phosphate rocks, mainly magmatic apatite and sedimentary metamorphic apatite.

2. Anti-flotation process

Mainly used to separate phosphorus and dolomite. Use fatty acid collector to precipitate dolomite in alkaline medium and enrich phosphorus in the tank. The advantage is that flotation at room temperature results in coarser particle size of the product, and subsequent processing is simple and convenient.

3.Double reverse flotation

Under alkaline conditions, double reverse flotation makes the silicate surface positively charged and uses anionic collectors to separate the ores. The dolomite is first flotated, and then the silicate is reversely flotated, leaving the heavy concentrate in the tank. This process can be operated at normal temperature and coarse particle size.