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Aluminum thermal self-propagating-injection depth reduction based method for preparing metal titanium

A self-propagating, titanium metal technology, applied in the field of titanium metal smelting, can solve the problems of complex process, high energy consumption, and large pollution, and achieve the effect of simple operation, low energy consumption, and short process

Active Publication Date: 2014-11-05
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the existing technology, in order to solve the defects of the existing titanium metal utilization process based on the Kroll method, such as long process, complicated process, high energy consumption, and large pollution, the present invention provides a method based on thermite self-propagating-spraying Method for preparing metal titanium by blowing deep reduction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The method for preparing metal titanium based on thermite self-propagating-injection deep reduction, specifically comprises the following steps:

[0043] Step 1: Material pretreatment

[0044] Rutile: aluminum powder: slagging agent: KClO 3, respectively weighed according to the mass ratio of 1.0:0.52:0.15:0.20; wherein: the slagging agent is 10% by mass ratio of CaF 2 and 90% CaO;

[0045] Roast rutile at 650°C for 24 hours to remove organic impurities and moisture; after mixing the slagging agent evenly, bake it at 250°C for 12 hours to dry it; KClO 3 Dry at 165°C for 24h;

[0046] Step 2: Thermite self-propagating reduction

[0047] Mix the materials evenly, place them in a self-propagating reaction furnace, spread a small amount of magnesium powder on the surface, ignite the magnesium powder to initiate a self-propagating reaction to obtain a high-temperature melt;

[0048] Step 3: Melting under the action of electromagnetic field

[0049] The high-temperature...

Embodiment 2

[0055] The method for preparing metal titanium based on thermite self-propagating-injection deep reduction, specifically comprises the following steps:

[0056] Step 1: Material pretreatment

[0057] Rutile: aluminum powder: slagging agent: KClO 3 , respectively weighed according to the mass ratio of 1.0:0.52:0.15:0.20, wherein the slagging agent is 20% by mass ratio of CaF 2 and 80% CaO;

[0058] Roast rutile at 680°C for 18 hours to remove organic impurities and moisture; after mixing the slagging agent evenly, bake it at 400°C for 8 hours to dry it; KClO 3 Dry at 180°C for 18 hours;

[0059] Step 2: Thermite self-propagating reduction

[0060] Mix the materials evenly, put them in a self-propagating reaction furnace, spread a small amount of magnesium powder on the surface, ignite the magnesium powder to initiate a self-propagating reaction to obtain a high-temperature melt,

[0061] Step 3: Melting under the action of electromagnetic field

[0062] The high-temperatu...

Embodiment 3

[0068] The method for preparing metal titanium based on thermite self-propagating-injection deep reduction, specifically comprises the following steps:

[0069] Step 1: Material pretreatment

[0070] Rutile: aluminum powder: slagging agent: KClO 3 , respectively weighed according to the mass ratio of 1.0:0.52:0.15:0.20, wherein the slag-forming agent is 25% by mass ratio of CaF 2 and 75% CaO;

[0071] Roast rutile at 550°C for 36h to remove organic impurities and moisture; after mixing the slagging agent evenly, roast at 300°C for 12h to dry it; KClO 3 Dry at 150°C for 32 hours;

[0072] Step 2: Thermite self-propagating reduction

[0073] Mix the materials evenly, put them in a self-propagating reaction furnace, spread a small amount of magnesium powder on the surface, ignite the magnesium powder to initiate a self-propagating reaction to obtain a high-temperature melt,

[0074] Step 3: Melting under the action of electromagnetic field

[0075] The high-temperature melt...

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Abstract

An aluminum thermal self-propagating-injection depth reduction based method for preparing metal titanium belongs to the technical field of metal titanium smelting. The method is as below: using an aluminum thermal self-propagating reduction process to reduce rutile or high titanium slag to obtain a high temperature melt; then conducting insulation smelting separation on the high temperature melt in a medium frequency induction furnace to form a slag layer with alumina as an upper layer and a titanium melt layer as a lower layer; injecting CaF2-CaO pre-melted slag to the alumina based slag layer in a bottom blowing way; washing slag and refining; then injecting a high temperature calcium magnesium steam or a high-temperature steam to the high temperature titanium metal melt layer through inert carrier gas carrying in a bottom blowing mode, and conducting eccentric mechanical stirring and depth reduction refining; and finally, cooling the high temperature melt to room temperature to remove the upper metal smelting slag, so as to obtain the metal titanium. The method of the invention can realize low cost and short process preparation of metal titanium, and the prepared metal titanium has oxygen removed completely. The method has the advantages of short process, low energy consumption and simple operation, etc.

Description

technical field [0001] The invention belongs to the technical field of metal titanium smelting, in particular to a method for preparing metal titanium based on thermite self-propagation-injection deep reduction. Background technique [0002] Titanium is known as the third largest metal after iron and aluminum. It is an irreplaceable strategic material for national economic development and national defense construction. It is widely used in aviation, chemical industry, weapons, nuclear industry, sports equipment, medical treatment and new energy. For example, a Boeing B787 aircraft uses 136 tons of titanium, and an Airbus A380 uses 146 tons of titanium. An F-22 uses 36 tons of titanium, each of the former Soviet "Typhoon" class nuclear submarines uses up to 9,000 tons of titanium, and an annual output of 1 million tons of caustic sodium electrolyzer uses up to 300-500 tons of titanium, and a daily output of 130,000 tons of MSF Type seawater desalination device uses 1500 tons...

Claims

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Application Information

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IPC IPC(8): C22B34/12C22B5/04C22B5/18C22B9/05
CPCY02P10/25
Inventor 张廷安豆志河张子木刘燕吕国志赫冀成
Owner NORTHEASTERN UNIV
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