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Method for preparing titanium sponge

A production method, the technology of sponge titanium, applied in the field of sponge titanium production, can solve the problems of affecting the reaction speed, affecting the reduction reaction speed, increasing the cost, etc., and achieve the effect of improving the utilization rate, increasing the first reaction speed, and increasing the cost

Active Publication Date: 2012-12-26
朝阳金达钛业股份有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The problem encountered in actual production is: because the impurity magnesium oxide in liquid magnesium is lighter than liquid magnesium, it floats on the liquid magnesium and affects the reduction reaction speed; the other is that other non-metallic impurities are mixed in liquid magnesium and affects the reaction speed. , thereby affecting product quality
Due to the absence of magnesium chloride, the wettability between the liquid magnesium and the reactor wall is affected, and the iron content in the sponge titanium is increased; the above problems lead to the secondary reaction of a large amount of titanium dichloride and titanium trichloride in the first reaction 1. Generate granular titanium, affect the appearance and color of the product, reduce the yield, affect the post-distillation effect, increase the impurity content of the product, and affect the product quality; the other is that the granular titanium is mixed in the gap of the titanium sponge, blocking the channel for liquid magnesium to climb up, reducing the Magnesium utilization, increased cost

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Embodiment 1

[0025] The invention provides a method for producing titanium sponge, said method comprising the following steps:

[0026] a. 4.2 tons of magnesium metal are installed in the reactor;

[0027] b. Prepare a magnesium chloride block of 1mm to 100mm, and the weight ratio of metal magnesium to magnesium chloride is 4:1;

[0028] c. Add the magnesium chloride block evenly to the top of the metal magnesium in the reactor;

[0029] d. Use a Roots pump to evacuate for 30 minutes, then input argon to a positive pressure of 0.05mPa for protection, and wait for it to enter the furnace;

[0030] e. The temperature change after entering the furnace is: 150°C constant temperature degassing for 2 hours; 200°C constant temperature degassing for 2 hours; 300°C constant temperature degassing for 2 hours; then increase the temperature to 800-880°C and add liquid titanium tetrachloride for reduction reaction;

[0031] f. Add titanium tetrachloride in 10 times: add 1000kg for the first time, 100...

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Abstract

The invention discloses a method for preparing a titanium sponge, comprising the following steps of: placing metallic magnesium in a reactor; adding magnesium chloride blocks to the metallic magnesium according to the weight ratio (4:1) of metallic magnesium to magnesium chloride; using a Roots pump for vacuum pumping for 30 minutes, and inputting argon; achieving the following temperature variation after being put into a furnace: respectively carrying out constant temperature degasification at 150 DEG C for two hours, at 200 DEG C for two hours, and at 300 DEG C for two hours; raising the temperature to 800 to 880 DEG C, and adding titanium tetrachloride liquid for reduction reaction; adding titanium tetrachloride for ten times; and adding the magnesium chloride by ten times. The invention reduces the impurity content of the product, changes the surface color thereof, increases the rate of finished products and improves the product quality.

Description

technical field [0001] The invention relates to a method for producing sponge titanium. Background technique [0002] Sponge titanium is a spongy metal titanium produced by metal thermal reduction. The purity (quality) is generally 99.1% to 99.7%. The total amount of impurity elements (mass) is 0.3% to 0.9%, the impurity element oxygen (mass) is 0.06% to 0.20%, and the hardness (HB) is 100 to 157. According to the purity, it is divided into five grades from MHTiO to MHTi4. Sponge titanium is the main raw material for producing industrial titanium alloys. [0003] Sponge titanium production is the basic link of titanium industry, it is the raw material of titanium material, titanium powder and other titanium components. Turn ilmenite into titanium tetrachloride, put it in a sealed stainless steel tank, fill it with argon gas, and make them react with metal magnesium to get "titanium sponge". This kind of porous "titanium sponge" cannot be used directly, and they must be m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/12C22B5/04
Inventor 赵春雷孙海波
Owner 朝阳金达钛业股份有限公司
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