Method for preparing titanium sponge

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...

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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