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A method for preparing high-purity metal ytterbium by continuous reduction distillation

A metal and high-purity technology, which is applied in the field of one-time continuous reduction distillation to prepare high-purity metal ytterbium, can solve the problems of increased power consumption, loss of rare earth metals, and reduced yield of metal ytterbium in the second distillation, and achieves low overflow rate and low lanthanum impurities. The effect of reducing and increasing the yield of rare earth

Active Publication Date: 2022-04-22
BAOTOU RES INST OF RARE EARTHS +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Distillation and purification of metal ytterbium Due to the high vapor pressure of ytterbium, rare earth metals will be lost during metal distillation and purification, which reduces the yield of metal ytterbium
The power consumption of the second distillation will also increase

Method used

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  • A method for preparing high-purity metal ytterbium by continuous reduction distillation
  • A method for preparing high-purity metal ytterbium by continuous reduction distillation

Examples

Experimental program
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Embodiment example 1

[0036]High-purity ytterbium oxide and lanthanum scraps are mixed in a certain proportion, briquette, and put into a vacuum smelting furnace. Titanium plates with Ф6 round holes are respectively set on the transition section of the material block to the metal receiver. Heat up for 30min to 500°C, hold for 120min, heat up to 780°C, hold for 3h, heat up to 900°C in 30min, hold for 3h, heat up to 1150°C in 30min, hold for 7h; power off for 120min and cool down to 600°C, turn off the mechanical pump, flush with argon Cool to room temperature.

[0037] The metal samples were taken out, and the composition analysis results were as follows:

[0038] Y<0.00050, La0.00070, Ce0.00050, Pr<0.00050, Nd<0.00050, Sm<0.00050, Eu0.0010, Gd<0.00050, Tb<0.00050, Dy<0.00050, Ho<0.00050, Er<0.00050, Tm 0.00050, Lu<0.00050, Yb / RE99.99.

[0039] There are various rare earth elements in the sampled metal, and ytterbium can also be reduced by cerium, neodymium and yttrium rare earth elements.

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Abstract

The invention discloses a method for preparing high-purity metal ytterbium by one-time continuous reduction distillation, which comprises: adopting a vacuum smelting furnace, putting basic raw material briquettes into a metal crucible, and setting double plugs made of titanium and molybdenum at different temperature transition sections of the distillation system Plate; the hearth of the vacuum smelting furnace is evacuated to below 10Pa, the temperature is raised by power transmission, and the temperature is raised by controlling the heating rate and holding time, and the metal lanthanum is thermally reduced to high-purity ytterbium oxide by lanthanum to generate metal ytterbium, which is distilled by a double plug plate and condensed in the receiver In the process, after the distillation is completed, the diffusion pump is turned off, argon is filled, and the temperature is lowered to room temperature according to the set cooling rate and time. The invention ensures stable operation of the distillation process, low metal ytterbium overflow rate, high rare earth yield, and effectively removes impurity entrainment, so that the lanthanum impurity in the metal ytterbium is greatly reduced.

Description

technical field [0001] The invention belongs to vacuum metallurgical purification technology, in particular to a method for preparing high-purity metal ytterbium by one-time continuous reduction distillation. Background technique [0002] Vacuum smelting furnace is usually used to smelt alloy steel, which is generally composed of furnace, electric heating device, sealed furnace shell, vacuum system, power supply system and temperature control system. The sealed furnace shell is welded with carbon steel or stainless steel, and the joint surfaces of the detachable parts are sealed with vacuum sealing materials; in order to prevent the deformation of the furnace shell and the deterioration of the sealing material after heating, the furnace shell is generally cooled by water or air. The furnace is located in a sealed furnace shell. According to the purpose of the furnace, different types of heating elements are installed inside the furnace, such as resistance, induction coil, el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B59/00C22B9/02C22B9/04C22B5/04
CPCC22B59/00C22B9/02C22B9/04C22B5/04
Inventor 张先恒刘玉宝赵二雄苗旭晨陈国华刘冉
Owner BAOTOU RES INST OF RARE EARTHS
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