Acid in-situ leaching uranium mining laboratory simulation device and test method

A laboratory simulation and in-situ leaching uranium mining technology, which is applied in the field of uranium mining, can solve the problem of incomplete compliance with in-situ leaching uranium field tests and production, and the inability to accurately examine the accumulation of impurity ions, the impact of uranium leaching and ore water permeability, etc. problems, to achieve the effect of reducing the risk of mine blockage and improving the level of prevention

Inactive Publication Date: 2017-12-12
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The current column leaching test methods are all in accordance with the industry standard (Q / CNNC JB 15-2014), using a one-time prepared leaching agent for leaching, and did not recover the uranium from the previous leaching solution and then return it to prepare the leaching agent, so it is impossible to accurately examine the impurities in the leaching process. Effects of Ion Accumulation Degree and Precipitation on Uranium Leaching and Ore Water Permeability
The current indoor leaching test method does not completely conform to the characteristics of the field test and production of in-situ leaching uranium mining

Method used

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  • Acid in-situ leaching uranium mining laboratory simulation device and test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A low-carbonate sandstone uranium ore determined the concentration of the leaching agent through the preliminary indoor stirring leaching test, and carried out the column leaching test to verify the concentration of the leaching agent and find out the leaching performance of the ore and the accumulation of impurity ions.

[0069] Step 1: Sample Loading

[0070] A 1.5 kg sample, with a uranium grade of 0.050%, was loaded into a 1 L volume leaching column and compacted to a density close to that of the original core. Take 5L of mine water and place it in the leaching agent storage tank, open valve A, the mine water flows into the ore in the column from the lower end of the leaching column, close valve B, open valve C, and the mine water flows into the leach tank until the flow rate is stable, when the flow rate is stable It is 10ml / h.

[0071] 20ml of strongly basic anion exchange resin is loaded into an ion exchange column for use.

[0072] Step 2: Preparation of leach...

Embodiment 2

[0087] A sandstone uranium ore has been tested to determine the concentration of the leaching agent through the preliminary indoor stirring leaching test, and the column leaching test is carried out to verify the concentration of the leaching agent and to find out the leaching performance of the ore and the accumulation of impurity ions.

[0088] Step 1: Sample Loading

[0089]Put 3.0kg of ore sample, the uranium grade of the ore sample is 0.180%, into a leaching column with a volume of 1.5L and compact it so that its density is close to the original core density; take 4L of ore layer water and place it in a leaching agent storage tank In the process, open valve A, the mine layer water flows into the ore in the column from the lower end of the leaching column, close valve B, open valve C, and the mine layer water flows into the leach solution storage tank until the flow rate is stable, and the flow rate is 6ml / h when it is stable.

[0090] The strong basic anion exchange resin...

Embodiment 3

[0106] A sandstone uranium ore has been tested to determine the concentration of the leaching agent through the preliminary indoor stirring leaching test, and the column leaching test is carried out to verify the concentration of the leaching agent and to find out the leaching performance of the ore and the accumulation of impurity ions.

[0107] Step 1: Sample Loading

[0108] A 4.0 kg ore sample with a uranium grade of 0.250% was loaded into a leaching column with a volume of 2 L and compacted to a density close to that of the original core. Take 4L of mine layer water and place it in the leachate storage tank, open valve A, the mine layer water flows into the ore in the column from the lower end of the leaching column, close valve B, open valve C, and the mine layer water flows into the leachate storage tank until the flow rate is stable, when the flow rate is stable 15ml / h.

[0109] The weakly basic anion exchange resin of 1000ml is packed into the ion exchange column for...

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Abstract

The invention provides an acid in-situ leaching uranium mining laboratory simulation device. The acid in-situ leaching uranium mining laboratory simulation device comprises a leaching agent storage tank, a leaching column, a leaching liquid storage tank, an ion exchange column, a leaching agent preparation tank, a pump, a valve A, a valve B, a valve C, a valve D, a valve E, a valve F, a valve G and connecting pipes, wherein the leaching agent storage tank is used for storing a leaching agent; the leaching column is used for containing an ore sample and providing a site for a contact reaction between the leaching agent and ore; the leaching liquid storage tank is used for containing leaching liquid; the ion exchange column is used for containing an adsorption material of uranium; the leaching agent preparation tank is used for containing the leaching liquid generated after the uranium is adsorbed by resin; the pump is used for conveying the prepared leaching agent into the leaching agent storage tank; and the connecting pipes are used for connecting all the components. The invention further provides a test method adopting the acid in-situ leaching uranium mining laboratory simulation device. Test results of the device and the test method can provide reliable basis for in-situ test engineering leaching agent preparation and the leaching technique, the risk that according to an in-situ test leaching system, an ore bed is blocked due to accumulation and sedimentation of impurity ions is reduced, and the prevention level is improved.

Description

technical field [0001] The invention belongs to the technical field of uranium ore mining, and in particular relates to a leaching test device and a test method in a sandstone-type uranium ore in-ground leaching by acid method. Background technique [0002] In-situ leaching (hereinafter referred to as in-situ leaching) uranium mining is a kind of uranium that integrates mining, dressing and smelting by drilling, using chemical reagents, and dissolving uranium in the ore from natural burial conditions without causing the ore to be displaced. mining method. The process has the advantages of low production cost, short construction period, and environmental friendliness, and its processing object is sandstone-type uranium ore resources. At present, my country has built many in-situ leaching mines in Xinjiang, Inner Mongolia and other places. Experience shows that the proven uranium resources generally go through the steps of laboratory test, field condition test, expansion tes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B60/02C22B3/02C22B3/06
CPCC22B60/0226C22B3/02C22B3/06
Inventor 闻振乾姚益轩胥国龙张翀李宏星
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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