CN-117385196-B - Charging method for producing high-purity titanium sponge

Abstract

The invention relates to a feeding method for producing high-purity titanium sponge, which comprises the steps of S1 adding distilled substances obtained by a reduction method into a reactor, S2 adding liquid magnesium into the reactor, feeding power to the reactor for constant temperature, S3 adding titanium tetrachloride for the first time, S4 feeding power to the reactor for constant temperature, S5 adding titanium tetrachloride for the second time, and S6 feeding power to the reactor for constant temperature. The method realizes the recycling of materials, saves the production cost, utilizes the process that titanium sponge particles settle towards the bottom of the reactor after being generated to adsorb metal impurities in titanium liquid, and the obtained titanium sponge product has the Fe content of generally below 0.002 percent, the Mn content of below 0.001 percent and the Al content of below 0.001 percent.

Inventors

• LIU DONGSHENG
• XU YONG
• Cao wanbao
• GUO ZHENSHENG
• TIAN XU
• JIANG MENGCHAO
• BAI YANG
• WANG HAO
• WANG HONGYU

Assignees

• 朝阳金达钛业股份有限公司

Dates

Publication Date

20260508

Application Date

20230928

Claims (2)

1. 1. A charging method for producing high-purity titanium sponge, which is characterized by comprising the following steps: S1, adding distillate obtained in the production process of a titanium sponge magnesium reduction method into a reactor, and carrying out power transmission heating to melt the distillate, wherein the temperature is 780-820 ℃ and the time is 4-8 hours; The distillate is a distillation condensate composed of magnesium and magnesium chloride; S2, adding liquid magnesium into the reactor, transmitting power, keeping constant temperature, and setting the temperature to be 820-850 ℃ for 2 hours; S3, adding titanium tetrachloride with the weight of 6-7% of the rated ton weight of the reactor into the reactor for the first time, wherein the material speed is 120-360kg/h, and the temperature of the bottom of the furnace body is set to be 820-850 ℃; s4, power transmission is carried out for 1h at constant temperature, and the temperature is set to 670-700 ℃; S5, adding titanium tetrachloride in the same amount as the first material, wherein the material speed is 120-360kg/h, and the bottom temperature of the furnace body is 670-700 ℃; s6, power transmission is carried out for 1h at constant temperature, and the temperature is set to 780-820 ℃; and S7, continuing feeding production according to a normal process after finishing the constant temperature.
2. 2. The method of claim 1, wherein the magnesium liquid in step S2 is magnesium liquid produced by electrolyzing magnesium chloride through a multipolar tank.

Description

Charging method for producing high-purity titanium sponge Technical Field The invention relates to the field of nonferrous metal smelting, in particular to a feeding method for producing high-purity titanium sponge. Background Along with the continuous perfection of the production process of the titanium sponge, the influence of the impurity content on the quality of titanium sponge products is also continuously reduced, and the production of high-purity titanium sponge in China is still different from the international advanced level. The main technical indexes of the quality standard of the sponge titanium are three aspects of impurity content, brinell Hardness (HB) and granularity, the impurity elements covered by the sponge titanium standards of different countries are different, and the Brinell hardness and granularity requirements are also different. The sponge titanium impurities in China mainly refer to Fe, S i, cl, N, C, O, mn, al and other main elements, and the content requirements of different impurities are different, wherein the Fe, mn and Al elements are difficult to remove in the production process of the sponge titanium. In addition, the container used in the magnesium melting process is made of steel materials, the solubility of the liquid Mg in the Mg is increased along with the temperature rise, the average Fe content in the Mg is 0.025 percent in actual production, the influence on the Fe content of impurities in the sponge titanium is great, the Al mainly comes from the liquid Mg produced in the multipole tank, the multipole tank is made of refractory materials mainly of alumina bricks and mullite, the Al content in the liquid Mg is increased in the production process of the multipole tank, the average Al content in the liquid Mg is 0.03 percent, the Mn content in the sponge titanium is mainly from magnesium ingots, the Mn content in the magnesium ingots is generally 02 percent, the ratio of the magnesium to the titanium is basically 1:1 in the production process of the sponge titanium, namely, 1t of titanium is produced by consuming 1t of magnesium, so that impurity elements in the magnesium generally all enter the titanium, the Al, the Fe and the Mn are harmful impurities in the sponge titanium, the content of the sponge titanium is excessively high, the influence on the content of harmful elements in the sponge titanium is extremely high, and the grade of the sponge titanium is extremely important to the pure impurities in the sponge titanium is removed. Disclosure of Invention The invention aims to provide a feeding method, which reduces the influence of iron, manganese and aluminum impurities in titanium sponge on the quality of products, particularly reduces the influence of magnesium serving as a raw material on the quality of producing titanium sponge, and greatly reduces the content of iron, manganese and aluminum impurities by improving a process method so as to produce high-purity titanium sponge. The technical scheme of the invention is as follows: a charging method for producing high-purity titanium sponge, comprising the following steps: s1, adding distillate obtained in the production process of a titanium sponge magnesium reduction method into a reactor, and carrying out power transmission heating to melt the distillate, wherein the temperature is 780-820 ℃ and the time is 4-8 hours; S2, adding liquid magnesium into the reactor, transmitting power, keeping constant temperature, and setting the temperature to be 820-850 ℃ for 2 hours; S3, adding titanium tetrachloride with the weight of 6-7% of the rated ton weight of the reactor into the reactor for the first time, wherein the material speed is 120-360kg/h, and the temperature of the bottom of the furnace body is set to be 820-850 ℃; s4, power transmission is carried out for 1h at constant temperature, and the temperature is set to 670-700 ℃; S5, adding titanium tetrachloride in the same amount as the first material, wherein the material speed is 120-360kg/h, and the bottom temperature of the furnace body is 670-700 ℃; s6, power transmission is carried out for 1h at constant temperature, and the temperature is set to 780-820 ℃; and S7, continuing feeding production according to a normal process after finishing the constant temperature. Preferably, the distillate of step S1 is a distillation condensate consisting of magnesium and magnesium chloride. Preferably, the liquid magnesium of step S2 is liquid magnesium produced by electrolysis of magnesium chloride through a multipolar cell. According to the mechanism of the sponge titanium reduction reaction, when titanium tetrachloride is added into liquid magnesium by the first feeding, as the temperature of the liquid magnesium is higher, a considerable part of titanium tetrachloride is not directly contacted with the liquid magnesium, and is directly gasified to become gaseous titanium tetrachloride, the gaseous titanium tetrachloride can uniformly spread and cover the sur