Phosphate flotation process is suitable for complex ore texture, complex ore occurrence relationship, fine particle size, disseminated closed, mixed symbiosis, difficult monomer separation phosphate ores.
Flotation methods include direct flotation, reverse flotation, double reverse flotation and other processes. More used in production practices are direct flotation and reverse flotation processes.
1.Direct Flotation Process
Direct flotation inhibits gangue minerals by effective inhibitors, and the phosphorus mineral is enriched in foam by collecting agent. This process is suitable for low grade phosphate ores including magmatite type apatite and sedimentary metamorphic type phosphorite ore
2.Reverse Flotation Process
Mainly used for the separation of phosphate and dolomite; dolomite is collected with fatty acid collector in weak alkaline medium, and the phosphorus mineral is enriched in the groove. The biggest advantage of reverse flotation process is the realization of the normal temperature flotation.
3.Double-Reverse Flotation Process
In alkaline condition, Double reverse flotation let silicate surface take positive charge and use anion collector to separate the ore. Flotine dolomite first, then reverse flotine silicate, the heavy concentrated ore left in tank. This process can be operated under normal temperature and coarse particle size.
According to the properties of different phosphate ores.
Phosphate ore dressing methods: 1. Flotation and scrubbing desliming; 2. Gravity separation, chemical leaching and combined mineral processing; 3. Photoelectric sorting and magnetic covering. Flotation is commonly used phosphate ore processing technology, including direct flotation, reverse flotation, positive and negative flotation and double reverse flotation.