Pyro-separation method of zirconia/hafnium oxide mixture

A separation method and mixture technology, which is applied in the field of zirconium and hafnium separation, can solve the problems of poor purification and impurity removal, high equipment requirements, and large investment, and achieve the effect of economical equipment investment, good separation effect, and easy industrialization

Active Publication Date: 2015-10-28
ЧЖУ, СИНФЭН
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the equipment and transportation system are operated at 350-500 °C, which requires high equipment, poor purification and impurity removal, and large investment. It is suitable for large-scale zirconium and hafnium smelters

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In a corrosion-resistant and high-temperature resistant ceramic reactor, add zirconium and hafnium oxides, add corresponding carbon, and enter the vaporized raw material pure bromine into the high-temperature reactor through nitrogen. The reactor is kept at 650 degrees, and the raw material bromine is added. After that, keep it at 650 degrees for one hour, and then obtain a mixture of zirconium tetrabromide and hafnium tetrabromide under cooling.

[0026] Enter the next step of rectification tower separation, add the mixture of zirconium tetrabromide and hafnium tetrabromide in the corrosion-resistant and high-temperature resistant ceramic reactor, add the molten salt mixture, the molten salt is a molten mixture of potassium fluoride and potassium aluminum sulfate The weight ratio is potassium fluoride: potassium aluminum sulfate=1.2~1.6:1, keep it below 357 degrees for two hours, the obtained product is non-target, keep it at 357 degrees for five hours, collect the targ...

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PUM

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Abstract

A separation method of a zirconia / hafnium oxide mixture. Putting the zirconia / hafnium oxide mixture, charcoal and pure bromine into a reaction for one hour under 650℃ to obtain bromide of zirconium and hafnium, adding the bromide of zirconium and hafnium into a molten salt mixture for distillation separation, and keeping a bottom of a distillation tower under 357℃ for two hours to obtain non-target substance; keeping for five hours at 357℃, and collecting high zirconium tetrabromide; saving residues in a kettle; performing distillation separation in a same device, hearting to 400 degrees, keeping for more than five hours to obtain hafnium tetrabromide, and using magnesium to displace the zirconium tetrabromide and the hafnium tetrabromide respectively to obtain pure zirconium and pure hafnium.

Description

[technical field] [0001] The invention relates to a method for separating zirconium and hafnium, in particular to a fire separation method for a mixture of zirconium oxide / hafnium oxide. [Background technique] [0002] Zirconium and hafnium have unique high temperature resistance, radiation resistance, and corrosion resistance. In the atomic energy industry, zirconium alloys are used as reactor cladding and structural materials, and hafnium is used as reactor control materials. Zirconium and hafnium are also widely used in chemical industry, metallurgy, electronics and other fields. [0003] The chemical properties of zirconium and hafnium are very similar, and they usually coexist in the ore in the form of oxides. The mass fraction of hafnium in natural zirconium resources is usually 1.5% to 3% of zirconium. Compared with this, atomic-level sponge zirconium requires w( Hf)<0.01%. Therefore, the separation technology of zirconium and hafnium is the key to producing atom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/14
CPCC22B34/14C22B9/02Y02P10/234Y02W30/54Y02P10/20Y02W30/50C01G25/02C01G27/02C22B7/002C01G25/04C22B5/00C01G27/04C22B15/008C22B15/0073
Inventor 朱兴峰
Owner ЧЖУ, СИНФЭН
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