CN111172494A

CN111172494A - Secondary titanizing method for reactor in titanium sponge production

Info

Publication number: CN111172494A
Application number: CN202010194507.0A
Authority: CN
Inventors: 舒煜; 陈太武; 曹海国; 王旭
Original assignee: Zunyi Titanium Industry Co Ltd
Current assignee: Zunyi Titanium Industry Co Ltd
Priority date: 2020-03-19
Filing date: 2020-03-19
Publication date: 2020-05-19

Abstract

A secondary titanizing method of a reactor in sponge titanium production comprises the steps of firstly assembling the reactor subjected to primary titanizing and a large cover, evacuating, detecting leakage, checking and accepting, then feeding the reactor into a cold end for production, collecting condensate distilled from a hot end, and lifting the reactor into a heating furnace; the heating furnace is powered on and heated to 900 ℃, and the temperature is kept constant for 0.5 hour; and (3) connecting a titanium tetrachloride feeding pipe to a feeding pipe arranged on the large cover, adding titanium tetrachloride at the feeding speed of 900 kg/hour, continuously feeding for 5 hours, stopping feeding, and carrying out reduction reaction on vaporized titanium tetrachloride and magnesium on the wall of the reactor at the temperature of 900 ℃ to release a large amount of heat, so that the reduced titanium sponge is enriched on the wall of the reactor to finish secondary titanizing of the reactor. After the reactor in the production of the titanium sponge is subjected to secondary titanizing, the impurity iron mixed in the reactor is reduced, the product grade is improved, the product quality is greatly improved, and the product quality is improved by 1 percent compared with the prior art.

Description

Secondary titanizing method for reactor in titanium sponge production

Technical Field

The invention relates to a secondary titanizing method for a reactor in titanium sponge production.

Background

In the industrial production of titanium sponge, the main production process is the production by the claul method, and the principle is that under the protection of argon, gaseous titanium tetrachloride is added into an iron reactor container, so that the titanium tetrachloride and molten magnesium which is added into the reactor at one time undergo a reduction displacement reaction to generate a main product of titanium foam and a byproduct of liquid magnesium chloride. The reactor is used as one of the main devices for preparing the titanium sponge, the material of the reactor is mainly common carbon steel and stainless steel, special treatment is needed during reduction production, and the common method is titanizing treatment. Many manufacturers start to use the reactor after the reactor is subjected to titanizing once. According to production practice, the upper part of the reactor subjected to primary titanizing has poor titanizing effect, so that the iron content of a produced sponge titanium product is very high, and the product quality is greatly reduced.

Disclosure of Invention

The invention aims to solve the technical problems that in a titanium sponge reduction production process, the upper part of a reactor subjected to primary titanizing has poor titanizing effect, so that the iron content of a produced titanium sponge product is very high, and the product quality is greatly reduced.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a secondary titanizing method of a reactor in sponge titanium production comprises the steps of firstly assembling the reactor after primary titanizing with a large cover, sealing the large cover with the reactor by a sealing rubber gasket, entering cold-end production after the reactor is qualified by evacuation, leakage detection and acceptance, collecting condensate distilled from a hot end, and after the distillation is finished, hoisting the reactor into a heating furnace to prepare secondary titanizing;

the method also comprises heating the heating furnace to 900 deg.C, and maintaining the temperature for 0.5 hr; and (3) connecting a titanium tetrachloride feeding pipe to a feeding pipe arranged on the large cover, adding titanium tetrachloride at the feeding speed of 900 kg/hour, continuously feeding for 5 hours, stopping feeding, and carrying out reduction reaction on vaporized titanium tetrachloride and magnesium on the wall of the reactor at the temperature of 900 ℃ to release a large amount of heat, so that the reduced titanium sponge is enriched on the wall of the reactor to finish secondary titanizing of the reactor.

Adopt above-mentioned technical scheme's beneficial effect:

after the reactor in the production of the titanium sponge is subjected to secondary titanizing, the impurity iron mixed in the reactor is reduced, the product grade is improved, the product quality is greatly improved, and the product quality is improved by 1 percent compared with the prior art.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

1-heating furnace, 2-reactor, 3-condensate, 4-sealing rubber pad, 5-large cover and 6-charging tube.

Detailed Description

The invention will be further explained with reference to the drawings.

A secondary titanizing method of a reactor in titanium sponge production comprises the steps of firstly assembling a reactor 2 subjected to primary titanizing with a large cover 5, sealing the large cover 5 with the reactor 2 by a sealing rubber mat 4, entering cold end production after the large cover 5 is qualified by evacuation, leakage detection and inspection, collecting condensate 3 distilled from a hot end, and after the distillation is finished, lifting the reactor 2 into a heating furnace 1 to prepare for secondary titanizing; the method is characterized in that: the method further comprises the following steps:

the heating furnace 1 is electrified and heated to 900 ℃ and is kept at the constant temperature for 0.5 hour; connecting a titanium tetrachloride feeding pipe to a feeding pipe 6 arranged on the large cover 5, adding titanium tetrachloride at the feeding speed of 900 kg/hour, continuously feeding for 5 hours, stopping feeding, and carrying out reduction reaction on vaporized titanium tetrachloride and magnesium on the wall of the reactor 2 at the temperature of 900 ℃ to release a large amount of heat, so that the reduced titanium sponge is enriched on the wall of the reactor 2, and thus, the secondary titanizing of the reactor 2 is completed.

Claims

1. A secondary titanizing method of a reactor in titanium sponge production comprises the steps of firstly assembling the reactor (2) after primary titanizing with a large cover (5), sealing the large cover (5) with the reactor (2) by a sealing rubber gasket (4), entering cold end production after being qualified by evacuation, leakage detection and acceptance, collecting condensate (3) distilled from a hot end, and after the distillation is finished, hoisting the reactor (2) into a heating furnace (1) to prepare for secondary titanizing; the method is characterized in that: the method also comprises the steps of heating the heating furnace (1) to 900 ℃ by power supply, and keeping the temperature for 0.5 hour; connecting a titanium tetrachloride feeding pipe to a feeding pipe (6) arranged on the large cover (5), adding titanium tetrachloride at the feeding speed of 900 kg/hour, continuously feeding for 5 hours, stopping feeding, and carrying out reduction reaction on vaporized titanium tetrachloride and magnesium on the wall of the reactor (2) at the temperature of 900 ℃ to release a large amount of heat, so that the reduced titanium sponge is enriched on the wall of the reactor (2) to finish secondary titanizing of the reactor (2).