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Method for producing titanium from titanium tetrachloride and magnesium reaction in fluid bed reactor

A technology of titanium tetrachloride and reactor, applied in the field of titanium metal production, can solve problems such as damage to titanium productivity

Active Publication Date: 2009-05-20
COOGEE TITANIUM PTY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can lead to damage in terms of titanium productivity

Method used

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  • Method for producing titanium from titanium tetrachloride and magnesium reaction in fluid bed reactor
  • Method for producing titanium from titanium tetrachloride and magnesium reaction in fluid bed reactor

Examples

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Embodiment 1

[0045] A cylindrical reaction vessel fabricated from stainless steel with a conical bottom having an inner diameter of 200 mm and an aspect ratio of 4 was purged with high-purity argon and then heated externally to 680°C. Once the preheat gas temperature reached 655°C measured at a control point 50 mm above the upper surface normally associated with the bed, 60 grams of 500-1000 µm titanium sponge particles were added to the system. Once the control point temperature returned to 655°C, the two reactant feeds were applied.

[0046] Titanium tetrachloride was supplied as a vapor at a temperature of about 500°C at a rate of 160 ml per hour. In this example, the reducing agent phase is magnesium metal, which is provided at a rate of 71 grams per hour as a finely divided powder (44-500 μm) conveyed in a low volume argon carrier flow at a temperature of about 500° C. temperature into the reactor. Two reactant inlets are located at the bottom of the fluidization zone.

[0047] Upo...

Embodiment 2

[0052]The structure of Example 1 was confirmed and quantified in the same reactor system, except that the method used anhydrous magnesium chloride particles for seeding. Fifty grams of analytical grade magnesium chloride powder, particle size -325 mesh, was transferred under argon to the reactor, which was previously purged with argon and preheated to 680°C. To achieve vigorous fluidization, high purity argon was passed at a rate of 50.5 standard liters per minute. Once the control point temperature measured 50 mm above the upper bed surface returned to 655°C, the two reactant feeds were applied. Titanium tetrachloride was provided as a vapor at a rate of 518 grams per hour at a temperature of about 500°C. In this example, the reducing agent phase was magnesium metal, which was supplied as a finely divided powder (44-500 μm) through a low volume argon carrier at a rate of 60 grams per hour.

[0053] The temperature increase observed during this test was about 10°C, which aga...

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Abstract

The present invention relates to a process for the production of titanium from the reaction of titanium tetrachloride and magnesium in a reactor, wherein the temperature in the reactor is above the melting point of magnesium and below the melting point of magnesium chloride, wherein the reaction results in the formation of particles comprising titanium, and Where the particles are removed from the reactor and processed to recover titanium.

Description

technical field [0001] The present invention relates to the production of titanium metal from titanium tetrachloride by reduction using magnesium, ie by magnesiothermic reduction. Background technique [0002] The Kroll method (US2205854) is used worldwide for the production of titanium from magnesium reduction of titanium chloride. The reaction takes place in a steel reactor where molten magnesium and gaseous titanium chloride are brought into contact, forming the titanium as a "sponge". Although this method has been applied for about 50 years, the reaction mechanisms involved and the formation of spongy bodies are still not clearly understood. The reaction is believed to be represented by the following equation: [0003] TiCl 4(g) +2Mg (1) = Ti (s) +2MgCl 2(1) [0004] Thus, under the prevailing conditions in the reactor, the magnesium chloride by-product is produced as a liquid and this enables its periodic removal from the reactor. [0005] Unfortunately, the Kro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/12C22B5/04C22B5/14
CPCC22B34/1295C22B5/14C22B34/1272
Inventor G·A·维尔伍德C·多布林
Owner COOGEE TITANIUM PTY LTD