Technology for extracting lithium by processing lithium ores through high-pressure steaming process

A high-pressure steam, lithium ore technology, applied in the field of metallurgy, can solve the problems of cumbersome alkali recovery process, excessive strong alkali, rising cost, etc., and achieve the effects of convenient lithium extraction, high yield and cost saving

Inactive Publication Date: 2013-09-11
INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that lithium ore powder has strong hygroscopicity. In order to maintain a high concentration of strong alkali, an excessive amount of strong alkali solution must be added to maintain the reaction in a liquid environment. The process is cumbersome

Method used

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  • Technology for extracting lithium by processing lithium ores through high-pressure steaming process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Mix lepidolite powder crushed to 100 meshes and powdery solid strong alkali according to the weight ratio of lepidolite powder: strong alkali = 1:0.5, put them into the reactor, start strong stirring, and use the straight-through method to pass through Enter the high-pressure steam, the temperature of the high-pressure steam is 100°C, and the pressure is 0.1MPa. Use the moisture in the high-pressure steam to participate in the reaction, so that the lithium ore powder and the strong alkali react under the action of water vapor at high temperature and high pressure for 2 hours, cool, and discharge;

[0021] (2) The reaction product is diluted with water to a mass percentage concentration of 0.1%, and the diluted material is ion-exchanged with a cation exchange resin to obtain cations in the system, including sodium ions, potassium ions, lithium ions, cesium ions and rubidium ions; the remaining The aluminum silica sol passes through an anion exchange resin, and then ad...

Embodiment 2

[0027](1) Mix lepidolite powder crushed to 700 meshes and powdery solid strong alkali according to the ratio of lepidolite powder: strong alkali = 1: 5 by weight, put them into the reactor, start strong stirring, and adopt the straight-through method. Enter the high-pressure steam, the temperature of the high-pressure steam is 180°C, and the pressure is 1MPa. The water in the high-pressure steam is used to participate in the reaction, so that the lithium ore powder and the strong base are reacted under high temperature and high pressure under the action of water steam for 8 hours, cooled, and discharged;

[0028] (2) The reaction product is diluted with water to a mass percentage concentration of 0.1%, and the diluted material is ion-exchanged with a cation exchange resin to obtain cations in the system, including sodium ions, potassium ions, lithium ions, cesium ions and rubidium ions; the remaining The aluminum silica sol passes through an anion exchange resin, and then adds ...

Embodiment 3

[0034] (1) Mix lepidolite powder crushed to 500 meshes and powdery solid strong base in a weight ratio of lepidolite powder: strong base = 1:3, put them into the reactor, start strong stirring, and use the straight-through method. Enter high-pressure steam, the temperature of the high-pressure steam is 250°C, and the pressure is 4MPa. Use the moisture in the high-pressure steam to participate in the reaction, so that the lithium ore powder and the strong base react under high temperature and high pressure under the action of water vapor for 5 hours, cool, and discharge;

[0035] (2) The reaction product is diluted with water to a mass percentage concentration of 1%, and the diluted material is ion-exchanged with a cation exchange resin to obtain cations in the system, including sodium ions, potassium ions, lithium ions, cesium ions and rubidium ions; the remaining The aluminum silica sol passes through an anion exchange resin, and then adds a small amount of sodium hydroxide as...

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Abstract

The invention discloses a technology for extracting lithium by processing lithium ores through a high-pressure steaming process. The technology comprises the following steps: mixing lithium ore powder with a powdery solid strong alkali for 20-40min to uniformity, directly letting in high-pressure steam, and carrying out dissolving and reacting of the powdery solid strong alkali and the lithium ores through utilizing water in the high-pressure water at a high temperature under a high pressure to completely generate soluble substances. In the invention, the strong alkali in the above reaction materials dissolves through absorbing water molecules in the water steam, so the application amount of the strong alkali can be substantially reduced, and the cost is saved. Lithium, sodium, potassium, rubidium and cesium ions in the lithium ores can be completely dissolved in a solution, so the lithium extraction is convenient, and the lithium yield is high. Fluorine in the lithium ores does not form strong-corrosion hydrofluoric acid corroding apparatuses. Reaction byproducts comprising an alumina sol and a silica sol can be directly sold, so the lithium extraction reaction cost is correspondingly reduced.

Description

technical field [0001] The invention relates to a process for extracting lithium by treating lithium ore with a high-pressure steam method, which belongs to the field of metallurgy. Background technique [0002] my country is rich in lithium resources, such as Keketuohai in Xinjiang, spodumene in northwestern Sichuan, and lepidolite in Yichun, Jiangxi, etc., all have abundant lithium resources waiting to be utilized. The development of my country's current lithium industry mainly extracts lithium from spodumene and lepidolite. The main methods include: 1. The sulfate roasting method. Lithium produces lithium carbonate. However, this method consumes a lot of potassium salt and has very strict requirements on the roasting temperature. According to the characteristics of high potassium content in lepidolite in Yichun, Guangzhou Research Institute of Nonferrous Metals in my country has studied a new process of leaching in the first and second stages of kraft roasting. It has th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12C22B3/42C22B26/12
CPCY02P10/20
Inventor 王丁程斌刘昕昕季清荣
Owner INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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