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

A liquid cathode, soluble technology, applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problems of long reduction time, equipment corrosion, environmental pollution, etc., achieve high electrolytic preparation and in-situ alloying, low cost, high current The effect of efficiency

Active Publication Date: 2021-09-28
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, low-priced titanium ion electrolytes are often prepared by reducing titanium tetrachloride with metal titanium. This process has disadvantages such as high cost, long reduction time, environmental pollution, and equipment corrosion.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 50g of metallic aluminum is added to the bottom of the alumina electrolytic tank from the feeding port. Using NaCl-KCl as the molten salt electrolyte, TiC and TiO with a weight of 1 kg were calcined at 1400 °C to synthesize Ti 2 The CO solid solution is used as the anode, and it is processed and shaped; the current density is 0.3A cm at 750°C under the protection of an inert atmosphere -2 Electrolyze for 4 hours; after the end of electrolysis, lift the anode from the molten salt to separate from the electrolyte, and continue to raise the temperature by 50°C, and siphon out the prepared low melting point alloy. After the titanium-aluminum alloy is suction-filtered, continue to add aluminum from the feeding port and put it into a soluble anode for electrolysis to prepare the titanium-aluminum alloy.

Embodiment 2

[0034] 50g of bismuth metal is added to the bottom of the alumina electrolytic tank from the feeding port. With NaCl-KCl-LiCl as the molten salt electrolyte, TiO with a weight of 2kg 2 TiC synthesized by high-temperature calcination of C and C in argon atmosphere at 1400 °C x o ysolid solution, and use an electric arc furnace to melt and cast it into an anode with a dense structure, and carry out the current density of 0.4A cm -2 Electrolysis for 2 hours; after the electrolysis, lift the anode from the molten salt to separate from the electrolyte, and continue to raise the temperature by 50°C, and discharge the prepared alloy from the alloy overflow port. After the alloy is discharged, continue to add the alloy from the feeding port and put it into the soluble anode for electrolysis to prepare the titanium-bismuth alloy.

Embodiment 3

[0036] 50g metal tin is added to the bottom of the boron nitride electrolytic tank from the feed port. with MgCl 2 -KCl-CsCl is a molten salt electrolyte, using TiO with a weight of 1kg 2 TiC synthesized by calcination of C and C at 1400 °C in a nitrogen atmosphere x o y N z solid solution, and use an electric arc furnace to melt and cast it into a dense anode, and carry out the current density of 0.1A cm in an inert atmosphere at 400 °C -2 Electrolysis for 3 hours; after electrolysis, lift the anode from the molten salt to separate from the electrolyte, and continue to raise the temperature by 50°C, and discharge the prepared alloy from the alloy overflow port. After the alloy is discharged, continue to add the alloy from the feeding port and put it into the soluble anode for electrolysis to prepare the titanium-tin alloy.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/28C25C7/02
CPCC25C3/28C25C7/025
Inventor 焦树强田栋华王明涌
Owner UNIV OF SCI & TECH BEIJING
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