| Considering the characteristics of fine-dissemination of the raw ilmenite in China, froth flotation is the most effective method of oredressing in respect of recovering the ilmenite of fine-grained level. Currently, the major problem facing the oredressing of the fine-grained ilmenite is the selection and use of the collector in the floatation agent. Based on a series of flotation experiments on the single mineral ilmenite, artificial mixed mineral ilmenite, actual oreand detection and analysis of Mineral surface contact angle ,IR, UV, this paper studied the effects of different collectors upon the titanium mineral flotation performance for the purpose of providing a theoretical reference to the development and application of new pharmaceutical in the flotation of fine-grained ilmenite.In this paper, we have studied the effect of the three typical collectors (sodium oleate, salicylic hydroxamic acid and styrene acid) upon the floatation performance of the ilmenite and its mineral quartz gangue minerals at first. Then, on such basis, we selected the sodium oleate which has good ability of collection as the main component of the combined reagent, mixed it with salicylic hydroxamic acid and styrene acid which have a good selective ability, and conducted an experiment on floatation of single mineral and artificial mixed mineral. The result shows that the combination of the ilmenite collectors has a better effect than any one of the single reagents in use, and can effectively recover the ilmenite.The study on the application of the combination of collector shows that the positive cooperativity existed in the combination of sodium oleate and salicylic hydroxamic acid or styrene acid: the effect is best when their mixture ratio is 4:1. Furthermore, we also have studied the ability of collecting titanium minerals of a group of new collector combinations MOH, ROB and GYB, and the result is GYB>ROB>MOH.This paper has acquired the excellence-selecting index for ilmenite with high concentrate grade of 44.30% and a recovery rate of 66.3% through experiments on the floatation of the fine-grained real ore with low concentrate grade, the floatation of the ilmenite by combining the collector GYB and small closed-circuit experiments.Mineral surface contact angle measurements show that: the size of the mineral surface contact angle with the collector's collector performance and slurry pH on the mineral surface of the contact angle the greater the mineral floatability of the better recovery rate is higher . Combination of collector application and development of new agents will help increase the mineral surface of the contact angle, increase the hydrophobic properties of minerals, the floatability of minerals better.Through such testing methods as infrared and ultraviolet spectroscopy, this paper has conducted a research on the surface adsorption mechanism of minerals and reagents of the ilmenite under the collector system, discussed the change of the adsorption method and absorbance of reagents of the collector which happened on the surface of minerals. The study shows that, the use of the combination of collector and the application of new collectors not only increased the activity and the collecting ability of the reagents but also gave rise to the surface product which caused the minerals to have a better selectivity while being surface-hydrophobic and floatable. The theoretical test findings by taking GYB for example certified that, on the surface of the ilmenite happened a strong chemical adsorption of GYB, and a binding of the reagents and the metal ions on the mineral surface occurred which generated cricoid chelates. Meanwhile, the study on the interaction mechanism of the ilmenite and other combination of collector also certified that the chemical adsorption is the primary interaction mechanism. |
PDF Full Text Request