Resource recovery and zero discharge process for treating rare-earth wet-method smelting wastewater
A technology of hydrometallurgy and resource recovery, which is applied in the directions of heating water/sewage treatment, degassed water/sewage treatment, neutralized water/sewage treatment, etc., which can solve the problems of low enthusiasm for enterprise operation, high treatment cost, and long service life of equipment To solve the problem of water pollution, simplify the treatment process and improve the treatment effect
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Problems solved by technology
 Example 1:
 Taking rare earth soap wastewater, ammonium bicarbonate precipitation mother liquor, oxalic acid precipitation mother liquor, alkali soap wastewater, ammonium bicarbonate washing wastewater and straw washing wastewater from a rare earth wet smelting process as the treatment objects, the water quality characteristics are shown in Table 1, and the above 6 are taken respectively. 2m each of wastewater 3 Process according to the process of the invention.
 The rare earth soap wastewater is first left to stand for 24 hours in the grease trap (1) to collect the surface oil and P 507 0.5m after the oil storage tank 1#(7) 3 / h Nikoni pump performs dissolved air flotation treatment, collects the floating oil on the surface of the air flotation degreasing pool 1#(8) to the storage tank 1#(7), and then the waste water is discharged into the ammonium bicarbonate precipitation mother liquor pool (2) and carbon The ammonium precipitation mother liquor is mixed. ...
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