Groove surface acid mist source reduced clean production method and system in electrolysis workshop

Abstract

The invention provides a groove surface acid mist source reduced clean production method and system in an electrolysis workshop. According to the method, during normal electrolysis process, super sound with certain ultrasonic frequency and power density is applied to an electrolyte solution inside a groove and anode and cathode plates, thus achieving the purpose of controlling the size, quantity,motion speed and direction of oxygen and hydrogen bubbles which are separated out of the surface of the solution, and in this way, the subsequent process that the oxygen and hydrogen bubbles blast andrelease acid mist droplets on the free liquid surface of the electrolyte solution can be further controlled. By adopting the method, the occurrence of a large amount of acid mist caused by the blasting and sputtering of the bubbles on the free liquid surface of the electrolyte solution as well as the high-value resource loss can be reduced from the source, so that investment on end treatment facilities and high operation cost can be remarkably reduced, in this way, secondary pollution caused by acid mist treatment slag is avoided, and the damage of the groove surface acid mist to the health of workers in the workshop as well as to the ecological environment beyond the workshop can be relieved; and in addition, the electrolytic current efficiency is improved, and the electric energy consumption is reduced. The method is generally suitable for source prevention and control of the groove surface acid mist during zinc electrolysis, manganese electrolysis, nickel electrolysis, and other wet electrolytic processes.

Description

technical field [0001] This application relates to the field of hydrometallurgy, in particular to a clean production method and system for reducing acid mist sources on the tank surface of an electrolytic workshop. Background technique [0002] The wet electrolysis process of metals such as zinc, manganese, copper and nickel produces a large amount of acid mist, which is mainly released into the atmosphere of the workshop due to the explosion of hydrogen and oxygen gas generated at the cathode and anode electrodes of the electrolysis process on the electrolyte surface. Taking zinc electrolysis as an example, the H on the anode 2 O loses electrons to form H + and O 2 ; Zn on the cathode 2+ Gain electrons to generate Zn, and at the same time, a side reaction occurs to generate H 2 . o 2 and H 2 After rising to the electrolyte surface in the form of bubbles, they will burst and produce acid mist. The acid mist in the electrolysis workshop will not only corrode workshop ...

AI Technical Summary

Problems solved by technology

However, the implementation cost of this technology is high, and the added acid mist inhibitor will affect the purity and electrodeposition efficiency of the cathode metal product, which will easily deteriorate the cell condition; The material reduces the surface area of ​​the electrolyte and reduces the emission of acid mist. The emission reduction efficiency of this technology is 30% to 60%. It is thick and difficult to peel off; (3) The collection cover or mat is set up to collect or directly prevent the acid mist from entering the workshop air. This measure is easy to destroy the normal electrolytic balance conditions, resulting in disordered electrolytic process, and affecting daily manual tank inspection and access to the tank. The operation is complicated, time-consuming and laborious; (4) The forced ventilation technology is to collect the acid mist on the surface of the tank first and then concentrate it for absorption treatment. The power consumption of the treatment system is as high as about 20% of the electrolysis power consumption, and the acid mist absorbs a large amount of alkaline reagents. After absorbing acid, a large amount of sulfate concentrate containing heavy metal impurities is produced. There is no good way to use it. Therefore, this method higher operating costs

All in all, the disadvantages of the above-mentioned different technical methods limit their application in actual workshops

In addition, reducing the current density is also a method to reduce acid mist emission, but this method directly affects the output and power consumption of target metals, and it is difficult to promote in practical applications

At present, there is a lack of cleaner production technologies to reduce acid mist from the source by regulating the formation process of acid mist.

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