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        Aluminum surface treatment electroplating produces three major wastes

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        Aluminum surface treatment electroplating produces three major wastes

        Date of release:2018-07-04 Author: Click:

        Aluminum surface treatment electroplating produces three major wastes


        鋁表面處理


        1, the waste water


        Aluminum hard one flower electroplating process of wastewater, aluminum surface treatment is the discharge of the largest and has the most direct impact on the environment of hot and dirty. Due to the long process of electroplating mil-a-8625, there are many processes involved, and each process involves A wide range of fine arts and crafts, all of which must be cleaned before entering the next process. This makes the electroplating waste forest is not only a large amount, and the composition is complex, often contains a variety of harmful substances, direct emissions will certainly cause pollution to the environment. Some are long-term and difficult to eliminate, for example, all kinds of heavy metal deposits, in the water will accumulate in the body will also occur accumulation, once reached a certain concentration, harm will occur, and once harm, it is difficult to eliminate. In the 1970s, the heavy metal cadmium caused rice pollution in Japan. People around the country ate the rice there and drank the water there. As a result, a strange disease called ache disease occurred. Even the cats there often fall into the river because of broken leg bones and are called "suicide cats". Since then, cadmium plating has become a severely restricted use of plating species.



        2, waste gas


        The exhaust gas produced in aluminum anodized electroplating process is mainly acid fog, alkali fog and heated steam in the pretreatment process. Another is the cathode gas produced in the electroplating process, which contains the precipitated gas of plating liquid foam.


        All kinds of acid and alkali fog mainly cause pollution to the operating environment and directly endanger the skin and nasopharynx of production workers. Some will also cause pollution to the surrounding environment, making the trees die. Chrome-plating is the most serious gas precipitated by electroplating, because the current efficiency of chrome-plating is only about 12%, a large amount of hydrogen evolution makes the tyroic acid fog during chrome-plating become a serious pollutant. The popularization of trivalent chromium plating technology and the research and development of substitute chromium plating layer are carried out to finally eliminate the special type of chromium plating.


        Cyanide plating species, such as cyanide copper plating, cyanide galvanized, cyanide silver plating and other precipitated gases are toxic. The cyanide-free electroplating process should be implemented when there are alternative technologies and processes.



        3, waste residue


        The waste residue produced in the process of aluminum oxidation and coloring electroplating is mainly sludge containing heavy metal salts which is separated from the sedimentation tank after wastewater treatment. Direct waste residues in electroplating production process include anode mud, bottom foot of plating cylinder, degree of hanging device, wire binding, polishing dust and other recyclable wastes. Sludge is difficult to treat because it contains salts containing a variety of metal ions.


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        Zhejiang Ruifeng Machinery Equipment Co., Ltd.

        Contact person: Mr. Ma

        Tel: 0572-8186086

        Mobile phone: 18905728938

        E-mail: 234374094@qq.com

        Address: 88 Tianxin Road, Xinshi Town, Deqing County

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