A ground leaching pressure leaching test device and method

Abstract

The invention relates to a ground leaching pressurized leaching test device and method. The device includes a reaction kettle, an electrode detection system, an injection system and a control system; the reaction kettle includes a kettle cover, a kettle body, a sampling and drainage device, stirring motor, stirring paddle and electrode protective sleeve intubation; the top of the kettle body is a kettle cover, and the bottom is a sampling and draining device; a stirring motor is arranged on the kettle cover, which is connected with the stirring paddle inside the kettle body; The side of the body is equipped with two electrode protection sleeve intubation. The method includes the following steps: S1. Load bulk uranium ore rock samples into the reactor body, and add an appropriate amount of leaching agent; S2. Insert the voltage-resistant pH electrode and the voltage-resistant redox electrode into the electrode protection sleeve; S3. Insert the Put the kettle cover down and press the kettle body tightly to keep the reaction kettle sealed, and start stirring. The invention adopts a pressure-resistant electrode, which can monitor the reaction conditions in the kettle in real time, and adopts a detachable electrode protective cover, which can reduce the dead volume and protect the electrode head from the abrasion of the stirred rock core.

Description

technical field [0001] The invention belongs to the field of uranium leaching by in-situ leaching, and in particular relates to an in-situ leaching pressure leaching test device and method. Background technique [0002] Autoclave is usually used in the leaching experiment of in-situ leaching uranium mining using gas as reagent. Add leaching agent into the kettle, and add gas reagents such as oxygen and carbon dioxide through the gas pipe on the lid of the kettle. However, due to the difference in solubility between carbon dioxide and oxygen, carbon dioxide is generally added first, and then oxygen is added after it dissolves, and the reaction and leaching are carried out under oxygen pressure. The amount or concentration of oxygen is controlled by pressure, while carbon dioxide cannot be measured. . Other liquid reagents cannot be added under pressure. [0003] For many rock core samples, the conditions will change during leaching in the reactor, and it is impossible to c...

AI Technical Summary

Problems solved by technology

[0003] For many rock core samples, the conditions will change during leaching in the reactor, and the appropriate leaching conditions cannot be controlled, making the leaching results difficult to guide practice

The most obvious is that when carbon dioxide is used for pH adjustment, the pH value of the solution is low immediately after adding carbon dioxide, but since no carbon dioxide is added later, the pH value will gradually rise, which may lead to the leaching of uranium and other substances in the solution. Substance precipitation

[0004] In addition, for the leaching of alkaline or neutral environmental rock ores, the leaching solution is not easy to clarify, and it is necessary to take a larger volume of sample before filtering it.

For an experiment with a long leaching time and a large number of sampling times, it will have a greater impact on the volume of the reaction solution and the leaching

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