Response of Chalcopyrite Roughing Index to Ultrasonic Modified Sodium Silicate and Its Mechanism
In order to clarify the internal relationship between the roughing index of chalcopyrite and the ultrasonic modification of sodium silicate,the flotation test of actual chalcopyrite minerals was carried out with ultrasonic pretreated sodium silicate as the regulator.The pH value,viscosity and infrared spectroscopy were used to characterize the ultrasonic pretreatment of sodium silicate solution properties and pulp turbidity.The results showed that the roughing recovery of the chalcopyrite was sensitive to the performance of ultrasonic modified sodium silicate.The recovery of chalcopyrite by a sodium silicate treatment time of 15 min was 85.33%,which was 9.31%higher than that of the unmodified sodium silicate.Ultrasonic pretreatment can reduce the pH value of the sodium silicate solution,and reduce the viscosity by 0.36%,which was beneficial to the dispersion of sodium silicate in the slurry.In addition,ultrasonic pretreatment can also change the proportion of water molecules and the composition of sodium silicate functional groups in the sodium silicate solution,and increase the relative ratio of free water hydroxyl groups in the pretreated sodium silicate solution to Si-OH in H2 SiO3 by 7.81%and 1.02% respectively.The increase of free water component was beneficial to improving the hydrophobicity and flotation effect of the chalcopyrite,increasing Si-OH component in the effective component H2 SiO3 of sodium silicate,and strengthening the dispersion of slime to a certain extent,thus improving the recovery of copper in roughing operation.This research has certain reference significance for the application of ultrasonic technology in the field of non-ferrous metal flotation.
NETL
NSTL
万方数据
维普
