Method for titanizing inner wall of new reactor in production of titanium sponge

Abstract

The invention provides a method for titanizing an inner wall of a new reactor in the production of titanium sponge, which is characterized in that the method comprising the following steps: (1) carrying out leakage detecting, acid pickling, washing and drying on the new reactor; (2) internally installing a stainless steel or carbon steel sleeve, leaving a space between the sleeve wall and the reactor wall, smashing the titanium sponge or the waste titanium until the granularity is greater than 0mm and less than or equal to 50mm, and filling the smashed titanium sponge or waste titanium into the space between the reaction wall and the sleeve; (3) configuring the reactor and a condenser, entering a furnace and pumping the vacuum; and (4) degassing for 2-5 hours at the temperature of 100-200DEG C, degassing for 2-5 hours at the pressure of less than 100Pa and the temperature of 300-400 DEG C, finally stopping heating at the temperature of 900-975 DEG C, the pressure of less than 30Pa andafter maintaining a constant temperature for 10-20 hours, reducing the temperature, cooling to room temperature and dismantling the furnace. The invention has the advantages that compared with the processing methods of the new reactors by utilizing the titanium powder water aqua method, titanium powder medicinal extract method or titanium hydride method, the titanizing layer obtained by the method in the invention is compact, has good binding force with the base body, and can completely block the pollution of the reactor iron on the titanium sponge. After adopting the invention, in the reduction-distillation process in the production of the titanium sponge, the average content of iron in the new reactor products is lowered to below 0.06% from 0.15%, and the invention also has the advantages of simple method, easy operation, low cost, high efficiency and wide application range.

Description

technical field [0001] The invention provides a method for plating titanium on the inner wall of a new reactor for producing sponge titanium by a metal thermal reduction method, in particular a process for vacuum-plating titanium with metallic titanium. Background technique [0002] The key to the production of titanium sponge products is the control of impurity elements, especially to prevent product contamination during the reduction process. The reactor used in the reduction and distillation process of sponge titanium production is generally made of ordinary carbon steel or stainless steel. During the reduction and distillation process, the iron on the inner wall of the new reactor will enter the sponge titanium ingot, resulting in an increase in the iron content of the product. affect product quality. Therefore, the surface of the new reactor should be titanium infiltrated before use. [0003] At present, in the production of titanium sponge, titanium powder water solu...

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Problems solved by technology

[0003] At present, in the production of titanium sponge, titanium powder water solution method, titanium powder paste method or titanium hydrogenation powder method are usually used

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