Scandium extraction pretreatment system and treatment method for scandium-containing solution

Abstract

The invention provides a scandium extraction pretreatment system and a treatment method for a scandium-containing solution. The scandium extraction pretreatment system includes: a conditioning section, the conditioning section has a first inlet, a second inlet, and a conditioning solution outlet, the first inlet It is used to input scandium-containing solution, the second inlet is used to input concentrated sulfuric acid, and the outlet of the conditioning solution is used to output the conditioning solution; the aging settling part, the aging settling part has the first overflow port distributed from top to bottom, the second A liquid inlet is connected to the first slag discharge port, and the first liquid inlet is connected to the outlet of the conditioning liquid; the fixed bed has a second liquid inlet, a second overflow port and a second row distributed from top to bottom. The slag port, the second liquid inlet are in communication with the first overflow port; the first transfer pump, the first slag discharge port and the second slag discharge port are all in communication with the first transfer pump. Adopting this scheme can effectively reduce the content of solid particles in the scandium-containing solution, complete the aging and sedimentation process, and does not need to use multiple tanks, which reduces equipment investment and reduces the production cycle of the product.

Description

technical field

[0001] The invention relates to the field of scandium extraction pretreatment, in particular to a scandium extraction pretreatment system and a treatment method for scandium-containing solution. Background technique

[0002] Scandium is very dispersed in the earth's crust and is a typical scattered metal element. Due to the very low content of scandium in minerals, scandium can only be comprehensively recovered and enriched, separated and extracted from raw materials with complex composition. At present, scandium enriched in uranium thorium ore, laterite nickel ore, bauxite, ilmenite, zircon placer and other by-products is an industrially significant scandium resource in nature.

[0003] In the process of extracting scandium from laterite nickel ore, the temperature of the scandium-containing solution entering the extraction process is relatively high, reaching 50-60°C, and contains supersaturated calcium sulfate and a small amount of solid particles. If it ...

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