Cationic polyacrylamide processing tailings flocculation sedimentation - CHINAFLOC
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Cationic polyacrylamide processing tailings flocculation sedimentation
2014-11-22 09:36:54


Cationic polyacrylamide can fully meet the waste liquid treatment, the sludge concentration dehydration, mineral processing, coal washing, paper making, etc.

Flocculant is roughly divided into inorganic flocculant and high polymer flocculant two kinds big. Inorganic flocculant is mainly by reducing the surface potential way to play the role of reunion particles, such as price is cheap, but the dosage is bigger, the inefficiency of flocculation. High polymer flocculant with long chain structure, commonly on the chain functional groups containing a higher proportion of adsorption ability strong, can adsorption in different particle surface, the resulting bridging effect, the big floccules formation. Flocculant polymerization degree is higher, the aggregation effect more significant.

High polymer flocculant and the particles interact between process is divided into three steps: (1) of dispersing agent and the particles interact (defined as mixing action); (2) the rest of cohesion function; (3) further flocculation. Selection of anionic polyacrylamide (APAM) for tailing flocculant flocculation sedimentation treatment effect is best, and the flocculation sedimentation velocity impact from big to small in the order: pulp density > flocculating agent consumption > flocculant concentrations.

Flocculation precipitation technology has been widely used in all kinds of present mine tailings concentration in the production of settlement. Using flocculant "bridging" principle, in the role of cohesion, tailings particles collide with each other and in the long chain of flocculant structure under the action of adsorption together, gathered into larger flocculation groups, so as to speed up the tailings settling velocity. Flocculation is the essence of precipitation in the mixing process of coagulation, flocculation body and reaches a certain size and density, thus is advantageous to the precipitation, achieve the goal of QingZhuo separation. Grain diameter is proportional to the velocity, so the fine grained tailings in deep cone settlement flocculating agent must be added to obtain a larger size of flocculation, speed up the settlement of tailings.