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Waste Blue Adhesive Film Sheets

     

At present, pretreatment methods for precious metal-bearing waste blue adhesive film sheets include the roasting process and wet stripping processes (using inorganic solvents and organic solvents respectively).

The roasting process has the advantage of a short treatment flow, as alloy feedstocks can be obtained directly after roasting. However, it has drawbacks of high investment cost: it requires the procurement of incinerators and flue gas treatment devices (as a large amount of harmful flue gas generated during roasting needs to be treated), leading to high environmental protection costs.

For the organic solvent-based wet stripping process, its merit is that it is easy to realize large-scale and automated production. Nevertheless, this method has defects such as long process flow, high requirements for production equipment, large reagent consumption, great harm to human health caused by the high volatility of reagents, and difficult waste liquid disposal.

As for the inorganic solvent-based wet stripping process, it also has problems including long treatment flow, low mechanization degree during the treatment process and relatively low efficiency.

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