Sodium hexametaphosphate is a flotation agent in beneficiation

 The entire phosphorus chemical market is undergoing changes and development, and phosphorus chemical products are also striving for excellence. Sodium hexametaphosphate is a flotation agent in beneficiation. Flotation is a process of separating mineral particles by using the difference in physical and chemical properties of mineral surfaces. It was formerly called flotation beneficiation and is the most widely used method of beneficiation.


The ore mined from the ground is called the raw ore, and the raw ore is generally composed of useful minerals and gangue. The grade of the raw ore is generally relatively low and cannot be smelted directly and needs to be processed first. Most of the gangue and harmful components are removed, and useful minerals are enriched into concentrates for use in the next step. This process of processing raw ore is called beneficiation.


According to the different beneficiation methods, it can be divided into magnetic separation, flotation, gravity separation, etc.


Almost all ores can be separated by flotation. Such as gold, silver, galena, sphalerite, chalcopyrite, chalcocite, molybdenite, nickel pyrite and other "sulfide minerals", malachite, chalcogenite, zincite, heteropolar Separation of ore and oxide minerals such as hematite, cassiterite, wolframite, ilmenite, beryl, spodumene, rare earth metal minerals, and uranium ore. Selection of non-metallic minerals such as graphite, diamond, quartz, mica, feldspar and silicate minerals, non-metallic salt minerals such as fluorite, apatite, barite, and soluble salt minerals such as potash and rock salt.


Since sodium hexametaphosphate is a linear compound with a chain length of about 20-100 PO3- units, when it is adsorbed on the surface of minerals, it will aggravate the steric hindrance between the particles.


Sodium hexametaphosphate mainly acts as a dispersant. Prevent the aggregation of fine ore particles and make them in a monomer dispersion state, which has the opposite effect to the flocculant. The negative electricity on the surface of the slurry is enhanced, so that the repulsive force between the slurry particles is significantly improved. The polymerized macromolecules have a large water film, which effectively enhances the hydration of the slurry particles. Sodium hexametaphosphate complexes with calcium and magnesium ions in the pulp to form water-soluble complexes.

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