Method for synergistically and deeply removing oxygen in metal titanium by super-oxyphilic metal and calcium

A metal titanium and metal technology, which is applied in the field of super-oxophilic metal-calcium synergistically deep removal of oxygen from metal titanium, can solve problems such as easy increase of calcium oxide activity and easy fluctuation of deoxidation effect, and the method is simple and easy to achieve. good removal effect

Active Publication Date: 2020-12-18
GRIMAT ENG INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the above problems, the object of the present invention is to provide a method for super-oxophilic metal-calcium synergistically deep removal of oxygen in titanium metal, which further improves the calciu

Method used

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  • Method for synergistically and deeply removing oxygen in metal titanium by super-oxyphilic metal and calcium

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Experimental program
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Effect test

Embodiment 1

[0037] Get metal titanium band 15g, initial oxygen content 1330ppm, press (CaCl 2 ): m(Ti)=5:1 Add 75g of anhydrous calcium chloride (dehydrated at 500°C for 24 hours before use), add 10g of industrial calcium chips (at 900°C, the saturation solubility of calcium in anhydrous calcium chloride molten salt 2 times), add high-purity sponge yttrium 7.5g (50% of titanium raw material quality), add potassium chloride 22g (30% of anhydrous calcium chloride quality), metal titanium strip, anhydrous calcium chloride, chloride Potassium and high-purity sponge yttrium are filled in the titanium crucible, and industrial calcium chips are filled in the gap between the titanium crucible and the stainless steel crucible, and then the stainless steel crucible is sealed with a high-temperature sealing gasket. figure 1 shown.

[0038] Put the sealed crucible into a vacuum tank heated by a resistance furnace, cover the furnace cover, vacuumize to 0.04Pa, and then wash it with argon. Under the ...

Embodiment 2

[0040] Get metal titanium block 17g, initial oxygen content 1610ppm, press (CaCl 2 ): m(Ti)=8:1 Add 136g of anhydrous calcium chloride (dehydrated at 500°C for 24h before use), add 8g of distilled calcium chips (according to the saturation solubility of calcium in anhydrous calcium chloride molten salt at 800°C 1.5 times calculation), add high-purity yttrium block 5g (30% of titanium raw material quality), add potassium chloride 81g (60% of anhydrous calcium chloride quality), add metal titanium block, anhydrous calcium chloride, chloride Potassium and high-purity yttrium blocks are filled in the titanium crucible, and the distilled calcium chips are filled in the gap between the titanium crucible and the stainless steel crucible, and then the stainless steel crucible is sealed with a high-temperature sealing gasket. figure 1 shown.

[0041] Put the sealed crucible into a vacuum tank heated by a resistance furnace, cover the furnace cover, vacuumize to 0.4 Pa, and then wash w...

Embodiment 3

[0043] Get metal titanium rod 32g, initial oxygen content 2100ppm, press (CaCl 2 ): m(Ti)=20:1 Add 640g of anhydrous calcium chloride (dehydrated at 500°C for 24 hours before use), add 20.48g of high-purity calcium chips (at 1000°C, calcium saturated in anhydrous calcium chloride molten salt 0.5 times of solubility), add high-purity erbium plate 0.6g (2% of titanium raw material quality), do not add potassium chloride, metal titanium rod, anhydrous calcium chloride, high-purity erbium plate are filled in the titanium crucible, Fill the gap between the titanium crucible and the stainless steel crucible with high-purity calcium chips, and then seal the stainless steel crucible with a high-temperature sealing gasket. figure 1 shown.

[0044] Put the sealed crucible into a vacuum tank heated by a resistance furnace, cover the furnace cover, vacuumize to 0.1Pa, and then wash with argon. Under the protection of argon, heat up to 1000°C at a heating rate of 5°C / min, and keep at 100...

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Abstract

The invention discloses a method for synergistically and deeply removing oxygen in metal titanium by super-oxyphilic metal and calcium. The method comprises the following steps: filling specific positions of a reactor with materials such as super-oxyphilic metal, anhydrous calcium chloride, a titanium raw material and a calcium reducing agent; and carrying out distillation-deoxidation and disassembly-cleaning so as to stably reduce the oxygen content of titanium to be smaller than 100 ppm. The super-oxyphilic metal has extremely high oxygen affinity, and oxygen in calcium chloride fused salt can be subjected to solid solution or forms oxide, so that extremely low oxygen potential is created, and the thermodynamic problem of deep deoxidation is solved; and the calcium chloride fused salt has high fluidity and high solubility to the calcium reducing agent and calcium oxide, so that the kinetics problem of deoxidation is solved. Through organic combination of purification and deoxidationof Ca, deep, efficient and stable removal of oxygen in the metal titanium is realized. The method disclosed by the invention is simple and easy to implement, good in oxygen removal effect and free ofsecondary pollution, and the product meets the use requirements in the fields of target material manufacturing, optical coating, electronic element manufacturing and the like.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, and in particular relates to a method for synergistically deep removal of oxygen from metallic titanium by a super-oxophilic metal-calcium. Background technique [0002] Titanium has the advantages of low density, high strength, non-magnetism, corrosion resistance, heat resistance, and easy processing and forming. It has become the "third metal" after iron and aluminum. Therefore, some people predict that the 21st century will be the century of titanium. However, the physical and chemical properties of metal titanium are very sensitive to the interstitial atoms in the metal, such as oxygen, carbon, nitrogen, etc. Due to the nature of titanium itself has a very strong affinity for these gas impurities, especially oxygen, therefore, titanium is very easy to capture external oxygen during smelting and processing, resulting in a decrease in its purity. Especially in the cold, hot processing a...

Claims

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Application Information

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IPC IPC(8): C22B34/12C22B5/04C22B9/02B22F9/20
CPCC22B34/12C22B34/1268C22B5/04C22B9/02B22F9/20Y02P10/20
Inventor 王力军马朝辉闫国庆张顺利张建东吴延科齐申
Owner GRIMAT ENG INST CO LTD
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