A kind of industrial-grade metal lithium refining equipment and refining method thereof

Abstract

The invention relates to industrial-grade metal lithium refining equipment and a refining method, in particular to special industrial-grade metal lithium refining equipment and a refining method for chemical engineering and medicine industries. The equipment comprises a lithium melting tank, a first heating furnace, a liquid sealing valve, a pure lithium tank, a second heating furnace, a vacuum pump, an argon device and a control cabinet. A lithium melting tank vacuum pipe and a lithium melting tank argon pipe are arranged at the upper part of the lithium melting tank; a filter barrel is arranged in the lithium melting tank, and is suspended at the upper end of a tank body of the lithium melting tank; a lithium melting tank discharge pipe is arranged at the bottom of the lithium melting tank; and the first heating furnace is arranged outside the lithium melting tank. A pure lithium tank feed pipe is arranged at one side of the upper part of the pure lithium tank; a pure lithium tank discharge pipe is arranged at the bottom of the pure lithium tank; a pure lithium tank vacuum pipe and a pure lithium tank argon pipe are arranged at the other side of the upper part of the pure lithium tank; a pure lithium tank cover and a pure lithium tank body are totally tightly connected through a flange; a pneumatic valve cylinder is mounted on the pure lithium tank cover; long rod valves arranged in the pneumatic valve cylinder and the pure lithium tank are tightly connected through a flange; and a second heating furnace is arranged outside the pure lithium tank body.

Description

Technical field [0001] The invention relates to an industrial-grade metal lithium refining equipment and a refining method, in particular to an industrial-grade metal lithium refining equipment and a refining method dedicated to the chemical and pharmaceutical industries. Background technique [0002] Industrial-grade metallic lithium is widely used in the chemical and pharmaceutical industries. This special industrial-grade metallic lithium has special requirements for its quality: First, the sodium content in metallic lithium is relatively high, usually 1-3%. The second is the low content of solid slag. [0003] In industrial production, the crude lithium prepared by molten salt electrolysis is mixed with a large amount of molten salt electrolyte lithium chloride and potassium chloride, and the obtained metal lithium contains more impurities such as lithium oxide and lithium nitride. [0004] The traditional refining process is to melt the crude lithium in an open oil-bath crucibl...

AI Technical Summary

Problems solved by technology

There are two main problems in this refining equipment process: one is that the separation effect is not good, and there are often more salts and oxide impurities mixed in the product, and at the same time, the product contains high oil

Second, due to the high content of sodium in metallic lithium, there is a greater potential safety hazard during smelting

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