Chemical combination and efficient filter-pressing device in zinc electrolysis process

Abstract

The invention discloses a chemical combination and efficient filter-pressing device in a zinc electrolysis process. The chemical combination and efficient filter-pressing device comprises an inlet pipe, an outlet pipe, two centrifugal pumps and two filter presses. The inlet pipe is branched into two pipelines, one pipeline is connected with the outlet pipe through one three-way cock and one centrifugal pump, and the other pipeline is connected with the outlet pipe through the other centrifugal pump and the other three-way cock. The two three-way cocks are vertically communicated with a middle connecting pipe. The inlet pipe is connected with a zinc solution flow tank, and the flow tank is provided with an inverted-cone-shaped bottom structure. The two filter presses are connected in parallel and then connected with the outlet pipe, and control valves are arranged on parallel branches. The flow tank is connected with a steam heating chemical combination bucket. The two three-way cocks are ingeniously utilized, the series-connection and parallel-connection free switching operation of the centrifugal pumps is achieved, filter-pressing efficiency is improved, and the advantages that the structure is simple, and errors are not prone to happening during operation are achieved. The conical bottom of the flow tank is beneficial to output of zinc solutions and slag. A steam dissolution ring formed by a conical face ring and a screen hole cylindrical face ring is ingeniously utilized by the steam heating chemical combination bucket, the dissolution temperature rise effect is improved, and noise interference is completely eliminated.

Description

technical field [0001] The invention relates to a compounding and high-efficiency filter press device in an electrolytic zinc process. Background technique [0002] Electrolytic zinc is a hydrometallurgical process in which zinc ore is pulverized, compounded, impurity removed, blended and then electrolyzed. Compounding is the process of slurrying zinc ore powder in a compounding tank and adding sulfuric acid for chemical reaction. The combination can obtain soluble zinc sulfate, which is convenient for the later electrolysis operation. [0003] At present, the volume of the compounding barrel for industrial application can reach hundreds of cubic meters. During the compounding process, it is necessary to add steam to the compounding barrel to promote the progress of the compounding reaction, which not only realizes the purification of the electrolyte, but also facilitates the high-efficiency electrolysis in the later stage. [0004] However, steam is added into the chemical...

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Problems solved by technology

[0007] However, in the filter press operation, the existing centrifugal pumps cannot automatically adapt to such a process to achieve an ideal working state of high efficiency and high quality

Generally, when a centrifugal pump performs filter press operation, the head of the filter press is low in the early stage, but the flow rate is large, so that the motor is in an overload state, and it is easy to burn the motor; The flow rate decreases rapidly. At this time, although the motor works in a light-load and low-power state, the filter press efficiency is very low; although the filter press pump has the maximum head output state, due to the small flow rate of the filter press fluid, the filter press cannot be fully utilized. Work performance and improve work efficiency

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