A method for measuring permeability coefficient in rare earth leaching process

Abstract

The invention discloses a method for measuring the permeability coefficient in a rare earth ore leaching process. The method comprises the following steps: preparing an ore leaching container; putting a rare earth sample fetched on the site into the ore leaching container for saturation; before ore leaching, fetching standard ore leaching liquid of a certain amount and testing the pH value thereof as a standard pH value; taking one drop of the solution leached in a measuring cylinder with a dropper onto pH test paper every 0.5-1 hour, testing the pH value of the solution leached in the measuring cylinder, and comparing with the standard pH value; turning on a control knob to start ore leaching; recording the (delta)h and Q in unit time every 0.5-1 hour, and testing the pH value of the leachate; and calculating the permeability coefficient according to the formula K=(Q*L) / (A*(delta)h*t). In the invention, a practical and effective technical scheme is offered, and the true condition of the permeability coefficient in an ion-type rare earth ore leaching process is obtained.

Description

technical field [0001] The invention belongs to the technical field of rare earth treatment, in particular to a method for measuring the permeability coefficient in the rare earth leaching process. Background technique [0002] Ion-adsorbed rare earth ores are rare and valuable minerals in the world. Ionic rare earth resources are stored in the shallow surface of strongly weathered rock formations. The chemical replacement reaction of the solution in the seepage process of the ore body recovers rare earth cations. Therefore, the seepage law of the leaching solution in the ore body determines the recovery rate of the ionic rare earth ore body, and the permeability coefficient is an important parameter to characterize the seepage process. The method used to measure the permeability coefficient does not take into account the chemical replacement reaction, which is an important process in the infiltration process, nor can it characterize the variation law of the permeability coe...

AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is to provide a method for measuring the permeability coefficient in the rare earth leaching process, aiming at solving the problem that the current constant head test method cannot realize the test of the seepage process, cannot obtain the constantly changing permeability coefficient, and cannot test the chemical reaction process. The permeability coefficient and the problem that the permeability coefficient cannot be measured in the rare earth in-situ leaching process

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