Method for improving TiO2 cathode deoxidizing process by utilizing carbonaceous additive

Abstract

A method for improving TiO2 cathode deoxidizing process by utilizing a carbonaceous additive specifically comprises the following steps: mixing TiO2 and the carbonaceous additive according to the molar ratio of 2:1-19:1, and pressing a mixture into a block body with diameter of 10mm at the pressure of 1-5 t; performing heat treatment in the Ar protective atmosphere at the temperature of 800-1000 DEG C for 2-8 h to prepare a TiO2 / C composite cathode; using the TiO2 / C composite cathode prepared in the step 1 as a cathode, using a graphite rod as an anode, selecting CaC12 fused salt as an electrolyte system, exerting 2-3 V of bath voltage to perform electrolysis under the temperature condition of 800-950 DEG C for 5-20 h, removing an electrolysis product at the cathode, such asTi and TiCxOy compound at the normal temperature after finishing the electrolysis, and using deionized water and dilute acid to wash and remove chloride from electrolyte for many times. The method for improving the TiO2 cathode deoxidizing process by utilizing the carbonaceous additive has the advantages that the electrolysis time is shortened remarkably, the electrochemical reduction speed of the TiO2 cathode is accelerated accordingly, and a small quantity of added carbon powder enable the electrolysis products to become the compound of metal Ti and metal TiCxOy to be Ti and TiCxOy compound. By means of the method, the electrolytic process can be improved remarkably, remarkable reduction of energy loss is facilitated, and accordingly the production cost of the metal Ti is reduced.

Description

technical field [0001] The present invention relates to the improvement of TiO with carbonaceous additives 2 In the field of molten salt cathode deoxidation rate, especially a carbonaceous additive to improve TiO 2 Method for cathodic deoxidation process. Background technique [0002] Titanium metal has been widely valued by countries all over the world because of its series of excellent properties and abundant resource reserves. The existing titanium metal smelting process Kroll method has high cost, long process, multiple processes, low reduction efficiency, intermittent operation and other factors, resulting in high production cost of titanium metal, which seriously limits the application of titanium in various industries. It has not yet been widely used in many fields. With the continuous expansion of the application range of titanium metal, the development and research of new low-cost continuous processes has become a research hotspot in the modern metallurgical indu...

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Problems solved by technology

Too high electrolysis voltage and too long electrolysis time will cause the decline of current efficiency

On the other hand, due to the incomplete deoxidation of the FFC process, the products obtained by electrolysis are mostly titanium oxide solid solution Ti with high oxygen content. [O] , it must undergo subsequent refining before practical application, and the oxygen in the titanium-oxygen solid solution will re-oxidize titanium to TiO during the refining process 2

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