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Treatment method of standard exceeding of content of chlorine in titanium sponge

A treatment method and technology of sponge titanium, which is applied in the field of sponge titanium production, can solve problems such as the blockage of the middle channel of the distillation tank, the chlorine element of sponge titanium exceeds the standard, and affect the quality of sponge titanium, so as to reduce the chlorine content and improve the grade rate.

Active Publication Date: 2015-04-15
PANGANG GROUP TITANIUM INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When domestic sponge titanium enterprises are distilling sponge, 2-4% of the middle channel of the distillation tank is blocked, resulting in undistilled magnesium chloride in sponge titanium, resulting in excessive chlorine content in sponge titanium products, seriously affecting the quality of sponge titanium

Method used

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  • Treatment method of standard exceeding of content of chlorine in titanium sponge

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example 1

[0033] Put the whole lump of titanium sponge into the reactor that has been produced and cleaned, seal the bottom of the reactor with a blind plate, seal the reactor with a tank cover and evacuate the reactor to 60Pa for air tightness leak test, and pass Finally, put the reactor equipped with titanium sponge into a vacuum electric furnace, and degas at a low temperature of 150-200°C for 3 hours under the condition of a vacuum of 60Pa; then degas at a medium temperature, and the temperature is controlled at 250-300°C according to the successive stages , 350 ~ 400 ℃, 450 ~ 500 ℃, 500 ~ 550 ℃ four constant temperature section, and each constant temperature 2h. After the degassing is completed, raise the temperature of the electric furnace to 900-1020°C and continue vacuum distillation. During the distillation process, air convection is used to cool the distillate naturally. When the constant temperature is 37 hours at 900-1020°C, the vacuum degree in the reactor is <4 Pa for 7 hou...

example 2

[0036] Put the sponge titanium crushed to a particle size of 0.83-25.4mm into the reactor that has been produced and cleaned, seal the bottom of the reactor with a blind plate, seal the reactor with a tank cover, and evacuate the reactor to 90Pa for gas Leakage test for tightness. After passing the test, place the reactor with titanium sponge into a vacuum electric furnace, and degas at a low temperature of 150-200°C for 5 hours under a vacuum of 90 Pa; The stage control is 250~300℃, 350~400℃, 450~500℃, 500~550℃ four constant temperature sections, and each constant temperature is 3h. After the degassing is completed, raise the temperature of the electric furnace to 900-1020°C and continue the vacuum distillation at a constant temperature. During the distillation process, use air convection to cool the distillate naturally. When the vacuum degree in the reactor is less than 15Pa for 6 hours, and the distillation time is 53 hours, stop the heating reaction Fill the reactor with ...

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Abstract

The invention provides a treatment method of standard exceeding of content of chlorine in titanium sponge. The titanium sponge is titanium sponge produced by adopting a magnesiothermic reduction method. The treatment method comprises the following steps: placing the titanium sponge in a reactor, vacuumizing the reactor until the vacuum degree in the reactor is not more than 100Pa; heating the reactor to ensure that the titanium sponge in the reactor is firstly subjected to low-temperature degassing of a temperature phase of 150-200 DEG C and intermediate temperature degassing of four constant temperature phases of 200-300 DEG C, 350-400 DEG C, 450-500 DEG C and 500-550 DEG C to remove water and gas impurities in magnesium chloride hydrate in the titanium sponge; and after degassing is ended, continuously raising the temperature to 900-1020 DEG C for vacuum distillation to remove magnesium chloride in the titanium sponge. According to the method, the content of chlorine in the titanium sponge, which exceeds the standard, can be effectively reduced, and the grade rate of the titanium sponge is increased.

Description

technical field [0001] The invention relates to the field of titanium sponge production, and more specifically relates to a treatment method for excessive chlorine content in titanium sponge due to failure of vacuum distillation. Background technique [0002] Magnesium thermal reduction produces sponge titanium, and vacuum distillation is usually used to remove magnesium chloride and magnesium in sponge titanium. In order to reduce the chloride ion content in sponge titanium, sponge titanium has high requirements on the vacuum degree of the distillation tank during the vacuum distillation process, and strictly controls the temperature of the distillation electric furnace. When domestic sponge titanium enterprises are distilling sponge, 2-4% of the middle channel of the distillation tank is blocked, resulting in undistilled magnesium chloride in sponge titanium, resulting in excessive chlorine content in sponge titanium products, which seriously affects the quality of sponge ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/12C22B9/02
Inventor 杨健刘彬许虎诚黄子良姜方新
Owner PANGANG GROUP TITANIUM INDAL
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