Treatment method of electroplating sludge

Abstract

The invention provides a treatment method of electroplating sludge. The method comprises the following steps: (1) dissolving polyvinyl alcohol (PVA) particles into hot water at the temperature of 95 DEG C so as to prepare a PVA solution, and naturally cooling for later use; (2) taking the electroplating sludge and mineral powder used as a curing adsorbent, putting into a granulating machine, spraying a proper amount of the PVA solution prepared in the step (1) while mixing and stirring, and stirring for 2-30min to obtain composite electroplating sludge particles; (3) drying the composite electroplating sludge particles obtained in the step (2) for 6-12h at the temperature of 80-120 DEG C so as to obtain an electroplating sludge / mineral powder composite material.

Description

technical field

[0001] The invention relates to a treatment method of electroplating sludge. Background technique

[0002] The electroplating industry is an important basic processing industry in my country and one of the three major polluting industries in the world today. During its electroplating production process, a large amount of solid waste, mainly electroplating sludge, will be generated. These solid wastes contain a large amount of chromium, iron, nickel, copper, zinc and other heavy metal compounds and their soluble salts, which are highly toxic, unstable, and easy to lose, and belong to the national hazardous waste ("National Hazardous Waste List" HW17, class HW21). About 10 million tons of electroplating wastewater sludge is produced in my country every year, which is the main solid waste in the electroplating industry. A large amount of electroplating sludge is piled up in the form of solid waste, which will not only occupy the land but also easily pollute t...

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