Lime can be effectively suppressed pyrite, mainly due to the OH- and lime solution generated disincentive Ca +, OH- and pyrite surface of Fe2 + for the hydrophilic and form insoluble ferrous hydroxide [Fe (OH) 2 ] and iron hydroxide [Fe(OH)3] film, which inhibits pyrite. When pyrite is treated with xanthate, a hydrophobic film of iron xanthate has formed on the surface of the pyrite, OH- can also replace the xanthogen ion to form a hydrophilic ferrous hydroxide film on the surface thereof, so that Suppressed. The reaction is as follows: FeS 2 ]Fe(ROCSS) 2 +2OH-====FeS 2 ]Fe(OH) 2 +2ROCSS- Since the solubility product of Fe(OH) 2 is 4.8×10 −16 , The solubility product of Fe(OH) 3 is 3.8× 10—33, which is much smaller than the solubility product of Fe(ROCSS) 2 of 8× 10—8 , so it is in the alkaline pulp. OH- has the ability to displace xanthate anion and easily form a hydrophilic iron hydroxide film on the surface of pyrite. (2) Inhibition, in addition to OH-induced, Ca2+ also has an effect The presence of hydrophilic Ca(OH)2 colloidal particles hinders the collector from contacting the surface of the pyrite while being hydrophilic. Large-scale complete flour mill equipment, with high yield, high quality, healthy white color mainly, all aspects of the machine structure is very rigorous, there is not too much space, in the power aspect, multi-motor drive multi-group grinding head at the same time, produced flour can meet the standard flour, whether from raw or raw materials processing. Production, Large Flour Mill Equipment has a unique way of processing.
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(1) The inhibition of lime is mainly caused by OH-
December 14, 2019