A method for preparing sponge titanium by molten salt electrolysis in a resistance furnace

Abstract

The invention provides a method for preparing a titanium sponge through a resistance furnace by using a molten salt electrolysis method. The method comprises the following steps of: processing a calcium chloride fused salt (14) in a graphite crucible (2) in a low and constant temperature water extracting manner; charging argon into a sealed vacuum reactor through an air inlet pipe (6) after the water is removed; heating the resistance furnace (1) at a constant speed until reaching 1,000 DEG C; automatically lowering two electrode stems (9) through a lifting rod (8) in order to drive titanium dioxide (3) and a graphite plate (12) to enter the graphite crucible, wherein all current is 50A; exhausting carbon monoxide and carbon dioxide generated in electrolysis and the rest argon into a waste gas recycling tank through an air outlet pipe (10); lifting out the sealed vacuum reactor after electrolyzing to prepare the titanium sponge; pouring cooling water into an annular circulating water jacket (4) and an inner water jacket (5) until reaching room temperature; opening a reversed U shaped upper cover (11); taking out electrolyzed titanium dioxide; and then cleaning to obtain the titanium sponge with the purity up to 99.0%. The method has the characteristics of mature performance, safety and energy conservation performance.

Description

technical field [0001] The invention belongs to the technical field of smelting, and in particular relates to a method for preparing sponge titanium by using molten salt electrolysis in a resistance furnace. Background technique [0002] The more mature titanium smelting process is the Kroll method. The Kroll method is discontinuous, which not only has high production costs, large equipment losses, but also serious environmental pollution. [0003] In order to reduce its production cost and expand its production scale, FFC molten salt electrolysis method is also adopted. The process operation of molten salt electrolysis titanium smelting method is still in the experimental stage, and its process is roughly as follows: [0004] Titanium dioxide electrode sheet preparation → molten salt electrolysis → electrode sheet cleaning → detection [0005] The above-mentioned molten salt electrolysis is the key process of the molten salt electrolysis method. The specific method is to u...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of poor vacuum tightness and poor corrosion resistance of high-temperature molten salt in the molten salt electrolysis method, the present invention provides a method for preparing titanium sponge by using molten salt electrolysis in a resistance furnace. The method can electrolyze the sponge titanium well, and electrolyze the sponge titanium with better quality, which makes the FFC molten salt electrolysis method more mature, safe and energy-saving

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