Innovative new technology of preparing gallium using ion exchange method

Abstract

The invention discloses an innovative new technology of preparing gallium using an ion exchange method. The technology applies fixed bed ion exchange separating technology, adds operations of stirring by compressed air at a pressure ranging from 0.25 to 0.30 MPa and extruding, and uses the method of two-stage countercurrent desorption. The process is controlled as following: (1) adsorption: a seed pregnant solution is absorbed by forward flowing, the flow velocity in the bed is in the range from 5 to 6m / h, and counter-current wind is provided when the pressure reaches 150 KPa; (2) washing: wind in counter direction with liquid flows is provided to stir and wash and forward wind is provided to squeeze out impurity liquid, and the washing step is carried out for one or more times; (3) desorption: two-stage countercurrent desorption is carried out, and the flow velocity in the bed is in the range from 4 to 5 m / h in the first stage of desorption and in the range from 3 to 4 m / h in the second stage of desorption; and (4) regeneration: wind in counter direction with liquid flows is regenerated with stirring, then forward liquid is generated, and the flow velocity in the bed is in the range from 4 to 5 m / h. The novel technology is characterized by simple operation, low content of impurities in system, raised production power, reduced raw material consumption and raised production efficiency of apparatuses.

Description

technical field [0001] The invention relates to a new technological innovation process for producing metal gallium by an ion exchange method, and belongs to the technical field of metal hydrometallurgy. Background technique [0002] Ion exchange technology has outstanding applications in the field of water treatment and precious metal recovery. Especially in recent years, the use of ion exchange technology to extract metal gallium from Bayer process solution has been widely used in industrial production. Ion exchange technology is mainly composed of several processes such as adsorption, washing, desorption, and regeneration. Each process has corresponding reactions and unit operations. [0003] At present, the ion exchange technology mostly adopts dense moving bed. Although the moving bed technology can also exchange gallium metal ions in the Bayer process solution, due to the high viscosity of the adsorption liquid and many impurities in the production process, the adsorpti...

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Problems solved by technology

[0003] At present, the ion exchange technology mostly adopts dense moving bed. Although the moving bed technology can also exchange gallium metal ions in the Bayer process solution, due to the high viscosity of the adsorption liquid and many impurities in the production process, the adsorption is difficult and the washing is not thorough. , incomplete desorption, low system concentration and other shortcomings directly affect the process capacity and raw material consumption

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