A device for compounding and high-efficiency pressure filtration in the electrolytic zinc process

Abstract

The invention discloses a device for conducting combination and efficient filter pressing in a zinc electrolysis process. The device comprises an inlet pipe, an outlet pipe, two centrifugal pumps and two pressure filters. A first inlet pipe branch is connected with the outlet pipe through a three-way cock and one centrifugal pump. A second inlet pipe branch is connected with the outlet pipe through the other centrifugal pump and the other three-way cock. A driving gear is arranged between gears of the two three-way cocks and drives the two three-way cocks to rotate and switch simultaneously, and 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 flow trough of an inverted-cone-shaped bottom structure. The two pressure filters are connected in parallel and then connected with the outlet pipe. The flow trough is connected with a steam heating combination barrel. According to the device, the two three-way cocks are used skillfully, so that the convenient and fast switching operation between the series connection and parallel connection of the centrifugal pumps is achieved, and the filter pressing efficiency is improved. The device has the characteristics that the structure is simple, and the operation is not liable to errors. The inverted-cone-shaped bottom of the flow trough benefits the output of a zinc solution and mineral slag. The steam heating combination barrel skillfully uses a steam dissolution ring formed by a taper face ring and a screen aperture cylinder face ring, so that the dissolution warming effect is improved, and noise disturbance does not exist completely.

Description

technical field [0001] The invention relates to a device for compounding and high-efficiency pressure filtration 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 t...

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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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