FLOAT SORTING DEVICE FOR SELECTIVE SEPARATION OF NON-METALLIC MINERALS

摘要

The present disclosure relates to a multi-stage float sorting device(100), including a first flotator (110) float-sorting ores mixed with water based on a difference in density; and a second flotator (120) provided with a column extending in a top-down direction, one side of which communicates with the first flotator to receive primary concentrates(10a), and float-sorts the primary concentrates based on a difference in density to obtain secondary concentrates, wherein the second flotator (120) includes a washing water jetting section (123) provided at a top of the column to jet washing water so as to separate impurity minerals from the primary concentrates; a gas sparger (126) provided at a bottom of the column to jet an inert gas so as to generate bubbles; and an opening and closing section (124) located between the washing water jetting section and the gas sparger to partition an inside of the column into upper and lower regions, and form an opening so as to allow secondary concentrates accommodated in the column to rise when the pressure of the lower region exceeds a set value as the inert gas is supplied.