A method for selective pulverization and pre-enrichment of lean hematite ore by high-voltage electric pulse
A high-voltage electrical pulse, pre-enrichment technology, applied in chemical instruments and methods, solid separation, grain processing, etc. It is difficult to further improve the set index and other problems, so as to improve the degree of dissociation of monomers, which is beneficial to energy consumption and saves energy consumption.
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[0033] Use lean hematite ore with an iron grade of 20%;
[0034] The ore is roughly crushed to a particle size of -30mm by a jaw crusher;
[0035] Under the conditions of voltage 150kV, frequency 5Hz, and electrode spacing 25mm, the coarsely crushed material with a particle size of -30mm is crushed to a particle size of -5mm by a high-voltage pulse crusher;
[0036] Use a sieve with a sieve hole of 0.5mm to sieve the -5mm electric pulverized material into -5 ~ +0.5mm particle size material and -0.5mm particle size material;
[0037] The material with a particle size of -5 ~ +0.5mm is subjected to dry strong magnetic separation through a roller permanent magnet strong magnetic separator with a magnetic field strength of 950kA / m to obtain pre-enriched concentrate I and tailings I;
[0038] The material with a particle size of -0.5mm is subjected to wet strong magnetic separation through a vertical ring strong magnetic separator with a magnetic field strength of 400kA / m to obtai...
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