Method for measuring leaching parameters of dump leaching mineral pile at different depths

Abstract

The invention relates to a method for measuring leaching parameters of a dump leaching mineral pile at different depths. A parallel column leaching test system is formed by using two or more test columns with different lengths, wherein the number of the test columns and the number of measuring points of leaching parameters of a dump leaching mineral pile to be measured are the same; the ore loading height of each test column and the depths of the measuring points of the leaching parameters of the dump leaching mineral pile to be measured are the same. According to the method provided by the invention, a leaching solution and test ore samples of the dump leaching mineral pile at the different depths can be conveniently obtained, so that the leaching parameters, such as leaching rates of useful metals, concentrations, pH values and Eh values of a leaching agent and an oxidizing agent at different depths of the dump leaching mineral pile and the variation of the parameters along with the time are detected. Meanwhile, the invention further provides a method for detecting the leaching parameters, such as removal rates of harmful metals, recovery rates of the useful metals, concentrations, pH values and Eh values of the leaching agent and the oxidizing agent at different depths of the dump leaching mineral pile and the variation of the parameters along with the time for dump leaching treatment of solid wastes, harmful metal contamination soil and electronic wastes.

Description

technical field [0001] The invention belongs to the field of leaching mining, and in particular relates to a method for measuring the leaching rate of useful metals at different times and different depths in a heap leaching ore heap, the concentration of a leaching agent and an oxidant, and leaching parameters such as pH and Eh. [0002] The invention also belongs to the technical field of environmental protection, and specifically relates to a heap leaching method used to treat solid waste, harmful metal-contaminated soil and electronic waste, and to measure the removal rate of harmful metals at different times and different depths of the leaching heap, the recovery rate of useful metals, The concentration of leaching agent and oxidant and the method of leaching parameters such as pH and Eh. Background technique [0003] The characteristics of my country's uranium ore resources are that low-grade hard rock uranium ore accounts for a large proportion, and there are many type...

AI Technical Summary

Problems solved by technology

[0007] However, the traditional column leaching is single-column leaching, and the seepage of the leaching solution during the leaching process is an unsaturated seepage. In this state, because the matrix suction in the uranium ore aggregate in the test column is negative, it is impossible to obtain different results of the test column. It is also difficult to take test ore samples from different depths of the test column for leachate samples at different depths, so that the leaching rate of useful metals, concentrations of leaching agents and oxidants, and pH, Eh, etc. Determination of parameters is not possible

[0008] Although recently Valencia et al. proposed a method for measuring the leaching parameters at different depths of the heap leaching heap using a series column leaching test device composed of multiple test columns connected in series, the test device cannot physically maintain the same level as the heap leaching heap. consistency, ignoring the influence of ore self-weight on the leaching parameters at different depths of the heap leaching heap, and this influence is very large, so there is a large error between the obtained data and the actual situation of the heap leaching

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