초록 ▼

The invention relates to a flotation column including a plurality of controlled recycle chambers intentionally introduced into the column to cause the non-float fraction or gangue to drop down in the main float stream while the desired float fraction travels in the opposite direction by recycling to

The invention relates to a flotation column including a plurality of controlled recycle chambers intentionally introduced into the column to cause the non-float fraction or gangue to drop down in the main float stream while the desired float fraction travels in the opposite direction by recycling to continually mix the pulp while coursing through the column. Recycle zones are positioned on the periphery of the main passage or flotation zone within chambers located in series along the column. A portion of the slurry is drawn into a recycle zone where it passes downwardly to return to the flotation zone or the main passage through the column to again be swept through the column.

대표청구항 ▼

Apparatus for effecting concentration of minerals by froth flotation of a pulp containing a mixture of mineral particles and gangue particles comprising: a flotation column for receiving the pulp for generally vertical flow of said pulp in said column, at least two vertically spaced separate recycle

Apparatus for effecting concentration of minerals by froth flotation of a pulp containing a mixture of mineral particles and gangue particles comprising: a flotation column for receiving the pulp for generally vertical flow of said pulp in said column, at least two vertically spaced separate recycle chambers disposed along the length of said flotation column with each recycle chamber being defined between said column and a vertically extending partition wall which is spaced a distance inwardly of said column, said column defining a columnar flow area inwardly of said recycle chambers, each partition wall further defining a lateral inlet between said column and the upper end of each partition wall and a lateral outlet between said partition wall and the column thereby to separate columnar flow from recycle chamber flow, said column having a portion between said at least two vertically spaced separate recycle chambers that extends inwardly substantially the same distance that each partition wall is spaced from the column whereby recycle pulp is delivered back into the columnar flow from an upper recycle chamber prior to any further recycle thereof in a lower recycle chamber, pulp feed means for introducing the pulp into the flotation column, froth overflow means disposed adjacent the upper end of said flotation column for discharging a froth float fraction of the pulp, underflow discharge means disposed adjacent the lower end of said column for discharging therefrom a non-float fraction of the pulp, and, aeration means disposed in said column for generating bubbles of gas to separate said float and non-float fractions of said pulp, whereby pulp subjected to aeration treatment in said flotation column has a plurality of portions thereof subjected to recycle flow in said recycle chambers apart from said flotation column thereby to enhance recovery of float and non-float fractions.