Perm National Research Polytechnic University (Perm, Russia)

Chernyshev A. V., Postgraduate Student, alexcher-1997@yandex.ru
Poilov V. Z., Professor, Doctor of Engineering Sciences
Burov V. E., Postgraduate Student
Kuzminykh K. G., Senior Lecturer

There is currently a steady trend at the Verkhnekamskoye deposit for the processing of potash ores with a high content of clay-salt slime, which absorbs a significant part of the collector used in sylvinite flotation, thereby increasing its consumption, reducing the recovery of the target component (potassium chloride), and contaminating the sylvite flotation concentrate. This paper studies the effect of ultrasonic treatment on physicochemical characteristics of flotation reagents, such as ethoxylated nonylphenol (neonol) and ethoxylated primary amine, used in flotation desliming of sylvinite ores. It also assesses the effects of ultrasonic treatment conditions on the size of micelles, collector adsorption on the clay-salt slime surface, and the contact angle of slime particles. It has been found that ultrasonic cavitation reduces the size of collector micelles by 19.7 % for ethoxylated nonylphenol and by 20.3 % for ethoxylated primary amine at a specific ultrasound power of 0.85 W/cm³. A beneficial effect of ultrasonic treatment of the collector on slime particle surface hydrophobization has been identified, accompanied by an increase in the contact angle by 7.78 degrees in the presence of amine and by 10.49 degrees when neonol is added. The improved hydrophobicity of the slime after ultrasonic exposure of the reagents is explained by the dispersion of micelles and an increase in adsorption capacity. The flotation experiments have demonstrated the potential for improving sylvinite desliming by 2.24 % when using ultrasonic treated neonol and by 1.60 % when using ultrasonic treated ethoxylated primary amine.

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