Chemical combination and efficient filter pressing device in electrolytic zinc process

Abstract

The invention discloses a chemical combination and efficient filter pressing device in an electrolytic zinc process. The device comprises an inlet pipe, an outlet pipe, two centrifugal pumps and two filter presses, wherein an inlet pipe branch I is connected with the outlet pipe through a three-way cock and one of the centrifugal pumps and an inlet pipe branch II is connected with the outlet pipe through the other three-way cock and the other the centrifugal pump; the two centrifugal pumps are driven by a same motor; the two three-way cocks are communicated with each other up and down through a middle connecting pipe; the inlet pipe is connected with a zinc solution launder which has an inverted cone-shaped bottom structure; the two filter presses connected in parallel are connected with the outlet pipe and a control valve is arranged on each of the parallel branches; the launder is connected with a steam heating chemical combination barrel. According to the device disclosed by the invention, an operation of freely swtiching serial and parallel connections of the centrifugal pumps is realized, the press filtering efficiency is improved, and the device has the characteristics of being simple in structure and hard to make mistake in operation; the zinc solution and slag are favorably output by virtue of the cone bottom of the launder; According to the steam heating chemical combination barrel, by skillfully utilizing a steam dissolving ring formed by a cone-shaped ring and a sieve port column ring, the dissolving and temperature-raising effect is improved and interference of noise is completely avoided.

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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