Method for preparing titanium alloy by carrying out molten salt electrolysis on soluble titanate through liquid metallic cathode

Abstract

The invention discloses a method for preparing a titanium alloy by carrying out molten salt electrolysis on soluble titanate through a liquid metallic cathode. The method comprises the following stepsthat metal serving as the liquid cathode is contained in a silicon nitride crucible, the silicon nitride crucible is put in a graphite crucible, fluoride molten salt containing titanate with the masspercent ranging from 1% to 10% is added into the graphite crucible, the graphite crucible is put in a closed steel reactor, the temperature is increased to 300 DEG C under the argon atmosphere, constant-temperature operation is carried out for 24 h, and water in the molten salt is removed; the temperature is increased to range from 800 DEG C to 1000 DEG C, graphite is adopted as an anode, the liquid metal is adopted as the cathode, and constant-voltage electrolysis is carried out at the voltage ranging from 2.5 V to 4.5 V; and after electrolysis is finished, the silicon nitride crucible containing the liquid metallic cathode is lifted out from the molten salt, constant-temperature operation continues to be carried out for 0.5 h to 5 h, cooling is carried out to room temperature, cathode surface products are separated, and the titanium alloy is obtained. According to the method, the process is obviously shortened; application of concentrated sulfuric acid, chlorine and other corrosiveand contaminative chemical reagents is avoided, environment friendliness is achieved, the requirement for equipment materials is low, and operation is simple; and the liquid cathode has the function of depolarization on titanate reduction, and electrolysis and in-situ alloying of titanate can be enhanced.

Description

technical field [0001] The invention relates to the field of chemical metallurgy, in particular to a method for preparing a titanium alloy. Background technique [0002] Due to the advantages of light weight, high strength, good corrosion resistance and high heat resistance, titanium-based alloys are indispensable high-performance materials in the future aerospace, atomic energy, rail transportation, electronic information and other industrial fields. [0003] From the perspective of the whole process of titanium metallurgy and alloy preparation, the production of titanium alloy mainly includes three processes: titanium dioxide extraction from titanium concentrate, production of titanium metal by Kroll, and preparation of titanium alloy by fusion. Each process is divided into multiple single operations. composition. First, titanium-containing minerals are leached with concentrated sulfuric acid to obtain titanyl sulfate, and then hydrolyzed and calcined to obtain titanium d...

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Problems solved by technology

Wang Mingyong (201410724949.6) used titanate as raw material to electrolyze metal titanium in alkali / alkaline earth metal chlorides. However, titanate has almost no solubility in chloride molten salt, and the electrolysis process is poorly controllable and difficult to carry out continuously. Titanium metal can only be obtained by electrolysis

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