An in-situ reduction device and method for zinc cathode plates carrying electrolyte out of the tank

Abstract

The invention relates to an in-situ removing device and method for electrolytes carried when a zinc negative plate is taken out of an electrolytic bath. The device comprises absorption and recycling devices and a fixing frame. The fixing frame can be moved to the portion above the electrolytic bath and is provided with a device for lifting out of bath capable of vertically moving. The negative plate can be vertically lifted out of the electrolytic bath through the bath outlet device. The absorption and recycling devices for the electrolytes on the surface of the negative plate are arranged on the two sides of the fixing frame. The method mainly includes the steps of carrying out electrolysis and lifting out of bath; absorbing and recycling the liquid on the surface of the negative plate; and returning to the original position. By means of the method, the problem that the electrolytes which contain high-concentration heavy metal and are carried by the negative plate in the zinc electrolysis flow path when the negative plate is taken out of the bath enter wastewater is solved; the electrolytes carried by the negative plate are removed in an in-situ manner and returned to the bath when the negative plate is taken out of the bath, heavy metal pollutants are prevented from entering the wastewater from the source, and the amount of generated heavy metal wastewater is greatly reduced; and meanwhile the quantity of the high-value electrolytes lost by carrying is decreased, and the effective use ratio of the whole electrolytes is greatly increased.

Description

technical field [0001] The invention relates to a device and method for reducing electrolyte carried by a cathode plate, in particular to a device and method for reducing electrolyte carried by a zinc cathode plate out of a tank in situ, and belongs to the field of hydrometallurgical zinc electrolysis workshops. Background technique [0002] At present, the production process of zinc electrolysis process in my country mainly adopts manual operation, and the work of exiting the tank is simply completed by driving a car. There is a problem that the cathode plate carries a large amount of electrolyte into the cleaning wastewater when it exits the tank. The root cause of serious heavy metal water pollution in the zinc electrolysis workshop is the low level of clean production and backward process, technology and equipment. During the process of the cathode plate leaving the tank and transferring, part of the electrolyte carried by the plate falls to the workshop floor, and part ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an in-situ reduction device and method for the zinc cathode plate to carry electrolyte when it comes out of the tank. Through this device and method, it can be well solved that when the cathode plate comes out of the tank, a large amount of electrolyte enters the tank. The problem of waste water, especially to solve the problem of a large amount of entrained liquid stored in the pits on the surface of the zinc sheet deposited on the cathode plate, which cannot be solved by conventional technical means and the disclosed technology, further greatly improves the recovery rate of the entrained liquid on the cathode plate , and achieve high-efficiency recycling of electrolyte in situ, reduce resource loss and improve resource utilization

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