Method for preparing titanium alloy based on direct electrolysis of a liquid cathode and a soluble titanium-containing anode

Abstract

The invention discloses a method for preparing a titanium alloy based on direct electrolysis of a liquid cathode and a soluble titanium-containing anode, and belongs to the technical field of nonferrous metal extraction. The method comprises the following steps: cathode metal is placed in a closed electrolytic cell containing a molten salt electrolyte system, and heating and melting are performed to prepare the liquid cathode and a molten salt electrolyte; Ti-C-O and Ti-C-O-N prepared by carbon thermal reduction of high titanium slag, ilmenite and the like or Ti-S and Ti-C-S compounds prepared by sulfur thermal reduction are subjected to suspension smelting to prepare a large-size formed anode with a compact structure; and in a molten salt electrolyte system without low-valence titanium ions, the titanium alloy is prepared through direct electrolysis by adopting the current density of 0.1-0.5 A cm <-2 >. The method is short in technological process and easy and convenient to operate, corrosive and polluting chemical reagents such as concentrated sulfuric acid and chlorine are not used, the whole preparation process is environmentally friendly, no waste water or waste gas is generated, the requirement for equipment is low, and the method for preparing the titanium alloy by directly adopting the anode titanium source and the liquid cathode in a combined mode is provided for the first time.

Description

technical field

[0001] The invention belongs to the technical field of non-ferrous metal extraction, in particular to the molten salt preparation technology of titanium alloy. Background technique

[0002] Titanium and titanium alloys are widely used in aviation, aerospace, chemical industry, medical equipment, sports equipment and other fields due to their excellent physical and chemical properties. The whole process of titanium metal preparation mainly includes extraction of titanium dioxide from titanium concentrate, Kroll method chlorination-magnesium thermal reduction of TiCl 4 There are three processes of batching of titanium and other alloys; and each process has disadvantages such as multi-unit operation and the use of chlorine and sulfuric acid in the whole process. At present, vacuum consumable smelting technology is the main smelting method for preparing titanium alloys. The main process includes raw material preparation → pressing to prepare electrodes → forming...

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