Method of Purifying Substances by Suspension Melting

A suspension smelting and material technology, applied in the field of purification, can solve the problem of insufficient material purity, and achieve the effect of increasing the saturated vapor pressure difference and improving the purity.

Inactive Publication Date: 2019-04-30
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Based on this, it is necessary to provide a method for purifying substances by suspension smelting to solve the problem that the purity of substances prepared by traditional purification methods is not high enough

Method used

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  • Method of Purifying Substances by Suspension Melting
  • Method of Purifying Substances by Suspension Melting

Examples

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Embodiment

[0048] Provide industrial silicon raw materials with a purity of 99.80wt.% and refractory metal niobium. Industrial silicon raw materials include low-melting point impurities P, Al, Ga, and difficult-to-remove impurities Ti. Use acetone to clean the industrial silicon raw material and refractory metal, cut the cleaned silicon raw material and refractory metal into small pieces, place them in a copper crucible, close the furnace body, and adjust the air pressure in the furnace body. When the air pressure in the furnace reaches 2.0×10 -3 After Pa, stop vacuuming, and fill in argon with an atmospheric pressure, and then vacuumize until the pressure in the furnace reaches 2.0×10 -3 Pa. Adjust the current intensity so that the silicon raw material can be suspended or quasi-suspended in the copper crucible. Use a 30A electric current to heat the material block in the furnace, so that the temperature of the material block reaches the first temperature of 800°C, so that P, Al, Ga an...

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Abstract

The invention relates to a method for achieving substance purification through suspension smelting. The method comprises the steps that S100, a vacuum suspension smelting device is provided; S200, to-be-purified substance raw materials and metal are put into the vacuum suspension smelting device, impurities exist in the to-be-purified substance raw materials, the relation curve of the impurities is close to that of the saturated vapor pressure and temperature of to-be-purified substances, and the melting point of the metal is higher than that of the to-be-purified substances; and S300, the vacuum suspension smelting device is used for heating, the to-be-purified substances evaporate, and therefore the to-be-purified substances are separated from the impurities and the metal.

Description

technical field [0001] The invention relates to the technical field of purification, in particular to a method for purifying substances by means of suspension smelting. Background technique [0002] With the development of the national economy, the research and production of high-purity substances (metals and non-metals) have also been rapidly developed, and the requirements for the purity of substances are also getting higher and higher. The traditional method of purifying substances, the purity of the prepared substances is not high enough, for impurities whose saturated vapor pressure is close to the saturated vapor pressure of the substance to be purified, and the degree of vacuum is constant, but the temperature of the alloy liquid cannot reach the saturated vapor pressure of impurity volatilization Impurities are difficult to remove at the required temperature. The purity of the substance has a great influence on the performance of the substance. Therefore, there is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B9/02C01B33/037
CPCC01B33/037C01P2006/80C22B9/02
Inventor 刘源张恒王乃娟徐从华
Owner TSINGHUA UNIV
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