Several treatment methods of flotation machine containing chemical wastewater

The flotation machine is suitable for the separation of non-ferrous and ferrous metals, and also for the separation of non-metals such as coal fluorite and talc. The flotation machine is driven by a motor V-belt drive to rotate the impeller, which produces a centrifugal effect to form a negative pressure. On the one hand, it sucks in sufficient air to mix with the pulp, on the other hand, it stirs the pulp and the medicine, and at the same time refines the foam, so that the mineral is bound to the foam , Float to the pulp surface and then form mineralized foam. Adjust the height of the gate to control the liquid level so that the useful foam is scraped out by the scraper. In the flotation process, flotation reagents are often used to assist the flotation process. However, the wastewater contained in the flotation machine is also very unfavorable to the flotation machine, but this problem is not difficult to solve, so let's talk about flotation. Treatment method of wastewater containing chemicals in the machine:

    (1) Electrolysis method:

    Use platinum as an electrode, with a DC voltage of 0.5V and a current of 40mA for electrolysis (decomposition of xanthate).

    (2) Ozonation method:

     The treatment effect of xanthate is better, and there is no "active chlorine". However, it consumes a lot of electricity and has not been widely used in production.

    (3) Oxidative decomposition: oxidant used:

    Liquid chlorine, bleaching powder, sodium hypochlorite, etc. undergo oxidative decomposition. Its function is: "active chlorine" destroys the xanthate in the waste water and makes it oxidized into non-toxic sulfate. The pH value should be 7~8.5 during treatment. The treatment effect is good or bad, mainly depends on the proper amount of reagents. If the dosage is too small, the treatment is incomplete; if the dosage is too much, there is "active chlorine" in the purification solution.

    (4) Replacement recovery method:

    Adding sodium sulfide to wastewater containing xanthate and precipitation of heavy metals to form hydroxides can replace the xanthate for recycling.

    (5) Acidification or alkalization method:

    Adding sulfuric acid (100-200mg/L) to the waste water at the entrance of the tailings pond can destroy the xanthate in the beneficiation waste water and make the effluent quality meet the national discharge requirements. Lime can also be added to the tailings reservoir of the flotation machine and brought into the silt at the bottom of the reservoir along with the precipitation of metal hydroxides and the adsorption of flotation reagents.