Ether amines as flotation agent flotation quartz

First, the influence of stirring speed and bubble size

When Ahmed et al studied the mechanical flotation machine, flotation under four different particle sizes (75,165,360 and 655μm) different bubble size (5, 10, and of 40 m) silica, stirring speed Effects of (100, 300 and 600 r/min) on flotation kinetic parameters. At various agitation speeds of 300 r/min, all types of bubble flotation were very effective, and the 75 μm bubble gave the maximum number of kinetics.

At a stirring speed of 600 r/min, the flotation rates of the three larger size bubbles are lower than the flotation rate at the lowest agitation speed (100 r/min).

Second, the particle size and collector dosage

Klimpel et al. believe that in order to cost-effective flotation of coarse-grained minerals, it is necessary to use a relatively high amount of collector , but be wary of excessive amounts of collectors that may have a detrimental effect on the flotation system. Basic research conducted by Crawfoyd et al. on a quartz particle with a particle size range of 15 to 125 μm using a modified Harrison flotation tube showed that the surface of the 71 μm quartz particle requires only 35% of the collector coverage to reach 80. % recovery rate. Larger quartz particles (121 μm) require 60% collector coverage to achieve the same recovery. Fine-grained minerals have a much higher specific surface area than coarse-grained minerals. Therefore, for flotation of fine-grained minerals, the amount of collector required is much larger than that of coarse-grained minerals in order to achieve a certain surface coverage. The weight of the entrained material in the foam product is not directly proportional to the water recovery.

That is, for the flotation of fine-grained quartz, the ether monoamine is more effective than the ether diamine. Due to its large specific surface area, fine-grained quartz adsorbs more collectors, achieves a higher degree of hydrophobicity and is more conducive to foam stability.

The most suitable pH is 9.0, whether ether monoamine or ether diamine is used as the collector. The use of ether monoamines as collectors in flotation of fine-grained quartz is more effective than the use of ether diamines. In the case of flotation of a particle size of quartz, ether diamine can achieve better flotation results than ether monoamine at higher pH, but requires a higher amount of collector. When flotation of coarse-grained quartz at higher pH values, the use of ether monoamines as collectors is less effective. The presence of a certain amount of fine-grained quartz in the pulp can improve the flotation index of coarse-grained and medium-grained quartz. The presence of fine-grained quartz can affect the shape of the bubbles, reduce the size of the bubbles and increase the stability of the foam.

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