A kind of manufacturing process of sponge titanium with low impurity content

Abstract

The invention discloses a manufacturing process for titanium sponge with a low impurity content. Titanium slag and petroleum cokes are mixed and then suspended in fused sodium chloride salts, chlorine is introduced, and coarse titanium tetrachloride is obtained; the coarse titanium tetrachloride is subjected to centrifugal separation, liquid phase coarse titanium tetrachloride and solid phase residues are obtained, the liquid phase coarse titanium tetrachloride is subjected to distillation vanadium removal, and a distillate obtained through distillation vanadium removal is subjected to rectification silica removal; a distillate at the bottom of rectification equipment is collected, and refined titanium tetrachloride is obtained; magnesium metal is loaded into a reactor, magnesium chloride particles cover a magnesium metal layer, and nitrogen and chlorine are introduced after vacuumizing is conducted; and materials are put into a furnace, the refined titanium tetrachloride is added for reduction reaction, magnesium chloride is discharged, and the titanium sponge is obtained. Through the process, the product impurity content is lowered, the product appearance color is changed, the yield is increased, and the product quality is improved.

Description

technical field [0001] The invention relates to a production process of sponge titanium, in particular to a production process of sponge titanium with low impurity content. Background technique [0002] Sponge titanium is a spongy metal titanium produced by metal thermal reduction. The purity (mass) is generally 99.1%-99.7%. The total amount of impurity elements (mass) is 0.3%-0.9%, the impurity element oxygen (mass) is 0.06%-0.20%, the hardness (HB) is 100-157, and is divided into five grades from MHTiO to MHTi4 according to the purity. 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 po...

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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