There are five methods for chemical treatment of wastewater containing flotation reagents.
(1) Oxidative decomposition: oxidizing agent used
Liquid chlorine, bleaching powder, sodium hypochlorite, etc. are oxidatively decomposed. Its role is: "active chlorine" destroys the xanthate in the wastewater, so that it is oxidized to non-toxic sulfate, the pH is preferably 7 ~ 8.5 during treatment. The treatment effect is good or bad, mainly depending on the proper use of the reagents. The dosage is too small, the treatment is incomplete; the dosage is too much, and there is “active chlorine†in the purification liquid.
(2) Ozonation
The treatment of xanthate is better and there is no "active chlorine". However, the power consumption is large and has not been widely used in production so far.
(3) Electrolysis
White gold as an electrode, a DC voltage of 0.5V, 40mA current electrolysis (decomposition xanthate).
(4) Replacement recovery method
In the wastewater containing xanthate and having a precipitate of hydroxide formed by heavy metals, sodium sulfide is added under controlled pH conditions, and the xanthate can be replaced and recycled.
(5) Acidification or alkalization
Adding sulfuric acid (100-200mg/L) to the wastewater from the tailings pond can destroy the yellow medicine in the ore dressing wastewater, so that the effluent water quality meets the national discharge requirements “Class III Water Surface Emission Standardâ€. Lime may also be added to the tailings pond, and the flotation agent is adsorbed along with the precipitation of the metal hydroxide into the sludge at the bottom of the reservoir.Middle Heavy Duty Casters With PP Wheels
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