Mineral processing wastewater treatment: generally use anion PAM, strengthen the concentration of mineral processing plant pulp and water clarification, improve the hydraulic transport concentration of tailings and backwater utilization rate. Polyacrylamide is a water purification flocculant. At the same time, it is also a mineral processing aid. It can speed up the solid-liquid separation rate in mineral processing wastewater, improve the recovery rate and yield of minerals, increase income, and reduce the pollution of mineral processing wastewater to the environment.
The effect of treating mineral processing wastewater with polyacrylamide: 1, improve the reuse rate of wastewater treatment; 2, useful metal recovery in wastewater; 3, reduce wastewater emissions.
Mineral processing wastewater through experiments show that rarely used cationic polyacrylamide, only in a few minerals into acidic conditions, most of the anionic flocculant, and anionic polyacrylamide price is much lower than cationic polyacrylamide, so in the mineral processing of anionic polyacrylamide application more.
Taking copper ore as an example, the slurry of copper ore from the flotation tank enters the thickening tank for further settlement. At this time, flocculant is added to promote rapid settlement and clarification overflow. The clarified overflow will be used as circulating water, and the remaining concentrated tailings will enter the centrifuge for centrifugal dehydration. At this time, anionic polyacrylamide is added. The bubbles (concentrate) loaded with copper ore are mechanically separated from the overflow, and then concentrated and dehydrated. At this time, anionic polypropylene is added to improve the efficiency of sedimentation and filtration. The resulting concentrate contains nearly 25% to 35% copper, which is then enhanced by pyrometallurgy.