The role of sodium hexametaphosphate in mineral processing

Recovery rate and concentrate grade are important technical indexes in flotation operation of concentrator.

Minerals are resources given by nature, the ore mined from the mine, the general grade is relatively low, to achieve reasonable mining, need to use the difference between the physical properties or surface physical chemical properties, but does not change the mineral chemical composition of the physical separation process for mineral processing, and the mineral reagent in sodium hmetaphosphate and play what role?

(1) To separate useful minerals from gangue minerals and enrich useful minerals;

(2) Remove harmful impurities in useful minerals, so that useful minerals can be modeled;

(3) Recovery of associated useful minerals and comprehensive utilization of mineral resources. After ore dressing, concentrate, middling ore and tailing can be obtained.

The use of sodium hmetaphosphate in mineral processing will be commonly used because it can generate complexes with Ca2+, Mg2+ and other polyvalent metal ions. It not only inhibits carbonate gangue, but also quartz and silicic acid minerals. At the same time, it has a good dispersion effect on mineral slime and is often used as a dispersant. It can also inhibit the minerals containing these ions, and is the inhibitor of apatite, calcite, barite and carbonaceous shale and argillaceous gangue.

SHMP

Sodium Hexametaphosphate 

As for cassiterite flotation with oleic acid, sodium hexametaphosphate is commonly used to inhibit calcium-containing minerals. Sodium hexametaphosphate is also used to suppress gangue minerals such as feldspar, nepheline and kaolin in the flotation of pyrochlorite containing niobium, tantalum and thorium and zircon containing zirconium.

It can improve the recovery rate of concentrate. In flotation operation of concentrator, recovery rate and concentrate grade are important technical indexes.

Causes and treatment methods of low grade and recovery of concentrate:

(1) Low grade of raw ore, insufficient number of selected stages and short selected time:

(2) The raw ore has high oxidation degree and large mud content:

(3) select a large amount of scraping, select concentration:

(4) Improper dosage of inhibitors, collectors and other drugs, poor selectivity;

(5) The grinding size is not enough, and the selected size is coarse.

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So our company's solution is as follows:

First of all, in addition to increasing the number of mineral selection, in addition to adding sodium hamethaphosphate in the slurry as a dispersant, can eliminate the mud cover mineral surface of the harmful effect, also can be used to demud slurry treatment cyclone.

The amount of inhibitor is small, the inhibited minerals can not be fully inhibited, reduce the grade of concentrate, the amount of collector is too much, the inhibited minerals floating up also reduces the grade of concentrate. In production, it can be seen that when the amount of collector is too large, the bubbles will transition mineralization, the foam layer will fall, and the foam cannot be scraped out.

Therefore, the amount of collector should be moderate, can not be too large or too small, there are many kinds of inhibitors, in mineral processing is often used, it is a kind of polymerized sodium metaphosphoric acid, and strong activity, increase the anion in the pulp, so that the negative charge ions in the pulp increase, so that the negative charge of fine mud particles under the action of electrostatic repulsion, More evenly and stably dispersed in the pulp.

So rational use of sodium hexametaphosphate is also an important treatment method to improve the recovery rate of mineral concentrate.

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