A kind of process technique of integrative electroplating waste

A kind of process technique of integrative electroplating waste

  • CN 106,242,112 A
  • Filed: 08/15/2016
  • Published: 12/21/2016
  • Est. Priority Date: 08/15/2016
  • Status: Active Application
First Claim
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1. the process technique of an integrative electroplating waste, it is characterised in that comprise the following steps:

  • Step 1;

    collect electroplating wastewater of chromium, cyanide-containing electroplating water, pretreatment liquid, burnt copper waste water and general electroplating wastewater;

    Step 2;

    electroplating wastewater of chromium is directed respectively in pretreatment liquid and burnt copper waste water, by the chromic acid in electroplating wastewater of chromiumOxidation pretreatment liquid and the complex in burnt copper waste water respectively, more reacted waste water is directed respectively in general electroplating wastewater,And mix in comprehensive wastewater pond;

    Step 3;

    after complex is fully abolished, imports cyanide-containing electroplating water in comprehensive wastewater pond and mixes, and obtains comprehensiveElectroplating wastewater, relends the cyanide reduction remaining chromic acid of electroplating wastewater of chromium helped in cyanide-containing electroplating water;

    Step 4;

    add alkaline solution in integrative electroplating waste, the pH value of integrative electroplating waste is adjusted to 7, obtains primary sedimentationThing;

    Step 5;

    after filtering the primary sedimentation thing in above-mentioned steps 4, obtain the first supernatant;

    Step 6;

    add ferrous salt solution and hydrogen peroxide in the first supernatant, to react the remaining chromic acid of removal and cyaniding respectivelyThing;

    Step 7;

    again add alkaline solution, is adjusted to 9-10 by the pH value of the first supernatant, obtains secondary precipitate;

    Step 8;

    after removing the secondary precipitate in above-mentioned steps 7, obtain the second supernatant;

    Step 9;

    the second supernatant is carried out aeration, continues aeration two hours, and the pH value of the second supernatant controls at 10-11;

    Step 10;

    readjustment acid-base value, makes the pH value of the second supernatant be adjusted to 7-8, makes final electroplating wastewater reach discharge standard.

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