The invention relates to the technical field of
hydrometallurgy, particularly discloses an
activated carbon oil removal column
backwashing method, and solves the problem of oil removal efficiency reduction caused by
activated carbon adsorption saturation in electrodeposition
nickel production. The process comprises the following three steps: 1) washing
nickel with clear water: introducing clear water into an emptied column body, blowing in
compressed air with the pressure of 0.4-0.6 MPa, stirring for 3-5 minutes, soaking for 25-35 minutes, and repeating for 1-5 times to thoroughly elute
nickel ions; 2)
weak base activation: introducing
weak base water with the pH value of 8.0-9.0, blowing air, mixing, introducing saturated steam with the temperature of 160 DEG C, and raising the temperature to 80-85 DEG C; and 3) steam
desorption: after steam is stopped, carrying out secondary air-blowing stirring for 3-5 min, soaking for 25-35 min, and emptying waste liquid. A gas-heat-alkali synergistic regeneration mechanism is innovatively adopted, and in-situ efficient regeneration of the
activated carbon is achieved. The method has the effects that the oil removal efficiency of the regenerated activated carbon is recovered by 95% or above, the
oil content of the oil-removed liquid is less than or equal to 3.0 ppm, the service life of the activated carbon is prolonged by 300%, and the rate of a nickel electrodeposition premium grade product is increased to 99.2%. The technology is easy to operate, low in cost, free of
pollution and suitable for an oil removal
system for nickel /
cobalt /
copper hydrometallurgy electrodeposition.