Method for calculating mass concentration of ammonium sulfate liquid injection for ion-type rare earth in-situ leaching
An ion-type rare earth and in-situ leaching technology, applied in the direction of improving process efficiency, etc., can solve the lack of theoretical basis and other problems, and achieve a scientific and reasonable effect of injection liquid mass concentration
Active Publication Date: 2017-07-11
JIANGXI UNIV OF SCI & TECH
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Problems solved by technology
In the actual injection process, the injection concentration of ammonium sulfate depends more on the experience of technicians, and lacks the corresponding theoretical basis
Method used
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Embodiment Construction
[0037] The present invention conducts an undisclosed experiment in a rare earth mining area in southern Jiangxi, takes ore samples from different locations on the spot, mixes them, and prepares representative Xinfeng ion-type rare earth ore samples. The cup leaching test was carried out on the ore sample to obtain key parameters, and the calculation results were used as the conditions of the column leaching test to verify the accuracy of the calculation results. The specific implementation steps are as follows:
[0038] Step 1: Cup Dip Test
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Abstract
The invention relates to a method for calculating the mass concentration of an ammonium sulfate liquid injection for ion-type rare earth in-situ leaching, and the method is suitable for parameter design of a leaching agent solution for in-situ leaching. The method comprises: step 1, carrying out a leaching test in a tube; step 2, calculating the chemical equilibrium constant K of an ore body and the mole ratio n of reactants; step 3, measuring the parameter of a soil body; step 4, calculating the rare earth ion concentration corresponding to the rare earth raw ore grade; step 5, calculating the theoretical mass concentration of the ammonium sulfate liquid injection; and step 6, calculating the actual mass concentration of the ammonium sulfate liquid injection. Through overall consideration of all conditions, taking the chemical equilibrium constant as a starting point and taking the in-situ actual situation into consideration, the method for calculating the mass concentration of an ammonium sulfate liquid injection is provided, and the method provides theoretical basis for the mass concentration of a reasonably-added ammonium sulfate liquid injection which acts as a leaching agent. The mass concentration decided through the method is scientific and reasonable, and compared with a predicted rare earth leaching rate, the error is no more than 5%.
Description
technical field [0001] The invention relates to a calculation method for the mass concentration of ammonium sulfate injection liquid for ionic rare earth in-situ leaching ore leaching, which is suitable for the parameter design of the in-situ leaching agent solution. Background technique [0002] The in-situ leaching process has the advantages of high resource recovery rate, green, environmental protection, and strong adaptability. For ionic rare earth resources with a very large ore-forming area and a very small amount of resources per unit area, the in-situ leaching process has the advantages that are difficult to be replaced by other processes. The advantages of complete substitution have become the ion-type rare earth mining technology that the country vigorously promotes and applies. The process of in-situ leaching ore is to arrange liquid injection holes according to certain hole network parameters in the rare earth ore body area, inject leaching agent solution into th...
Claims
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IPC IPC(8): C22B3/14C22B59/00
CPCC22B3/14C22B59/00Y02P10/20
Inventor 秦磊王观石钟宜航罗嗣海刘剑
Owner JIANGXI UNIV OF SCI & TECH
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