Tubular purification method and tubular purification tank

Abstract

The invention provides a pipe type purifying method, the set purifying process of the solution to be purified is completed in a nonconservative pipe type purifying groove.The solution to be purified is a solution containing at least one granular solute; the pipe type purifying groove comprises a cavity full of liquid medium, at least one ultrasound wave source apparatus immersed in the liquid medium and at least one coiled apparatus full of the solution to be purified; the purifying process is that in the nonconservative flow process, the solution to be purified is irradiated in a insulation state by effective ultrasonic wave.

Description

Technical field [0001] The invention relates to a purification method and device for removing ionic impurities in a solution, especially a tubular purification method and a tubular purification tank for removing copper, cadmium, cobalt, and nickel impurities in a zinc sulfate solution under the condition of using zinc powder as a reducing agent. It belongs to the field of purification technology. Background technique [0002] The zinc sulfate solution produced by leaching zinc ore powder, commonly known as the supernatant, contains copper, cadmium, cobalt, nickel and other ionic impurities. The current general continuous purification process uses zinc powder as a reducing agent and adopts a tank-type purification method to achieve the purpose of impurity removal. The general tank-type purification method adopts multiple tank-type purification tanks in series, and removes copper, cadmium, cobalt, nickel and other ionic impurities by controlling the liquid temperature, purifi...

AI Technical Summary

Problems solved by technology

The problems of the trough type purification method include: 1) the volume of the tank is large (80-145m 3 ), the number of tanks is large (9-10), the purification process is long, and the energy consumption is high

2) Relying on the hydraulic force formed by mechanical stirring to remove the new cladding on the surface of zinc powder, the effectiveness is very low and the purification efficiency is low

3) The removal of cobalt and nickel ion impurities requires a high liquid temperature (85-95°C), and steam is used to directly heat the solution in the tank, resulting in intensified evaporation, unbalanced solution volume, and a large amount of harmful gas brought out by the evaporated water vapor out of the tank, causing environmental pollution

4) The slag-type grains produced by zinc powder replacement are easy to stay in the tank and redissolve in large quantities, resulting in increased consumption of zinc powder

5) The purification process cannot be adjusted flexibly, and cannot adapt to changes in the concentration of ions and impurities in the supernatant. It has strict requirements on the operation of the upstream batching process, and in turn requires strict control of the impurity components of the zinc ore powder raw material

As the raw materials of zinc ore powder tend to be depleted and the impurity content of raw materials tends to increase, the defects of the tank purification method are increasingly becoming the technical bottleneck of the purification of the supernatant

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