Copper removal treatment process for copper ammonia wastewater

Abstract

The invention relates to the technical field of copper removal of copper ammonia wastewater, in particular to a copper ammonia wastewater copper removal treatment process which comprises the following steps: S1, adding acid into copper ammonia wastewater, and adjusting the pH value back, so that NH3 in a copper ammonia complex in water forms NH4 < + >, a copper ammonia complex structure is destroyed, and copper forms Cu (OH) 2 to form a precipitate; s2, discharging filter residues of the copper-containing sludge by using a filter press; s3, putting a filtrate layer left after treatment in the previous step into a sodium sulfide reaction tank with a certain concentration for treatment; s4, filter residues of the copper-containing sludge are discharged by the filter press again, and a filtrate layer is left and can be directly discharged into a clean water tank; according to the process, on the premise of ensuring that copper reaches the standard, the cost is reduced by more than 1 / 2 compared with that of an original process of fully adding sodium sulfide.

Description

technical field [0001] The invention relates to the technical field of copper removal from cupro ammonia wastewater, in particular to a copper removal treatment process for cupro ammonia wastewater. Background technique [0002] With the development of modern society, life is more and more inseparable from electronic products, and circuit boards, as the core components of various electronic products, are an important module of my country's modern industrial development. [0003] With the continuous development of industry and the current situation of lack of fresh water in my country, the demand for wastewater purification and rebate is increasing, and sewage treatment has become an indispensable part of industrial production. [0004] In the production process of the circuit board, the circuit on the board needs to be accurately printed by etching; the commonly used etching solution on the market is the alkaline copper chloride etching agent, which mainly contains a large a...

AI Technical Summary

Problems solved by technology

However, due to the high cost of sodium sulfide reagents, the cost of using this method is also high. This technical plan is to use the cuproammonia complex itself, combined with the original treatment process, to develop a new type of cuproammonia wastewater Treatment process

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