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Large-scale production method for preparing high purity gallium

A production method and high-purity technology, applied in the field of purification, can solve the problems of high energy consumption, high gallium consumption in the process, unstable quality, etc., and achieve the effects of low energy consumption, consistency, and high conversion efficiency.

Active Publication Date: 2012-08-01
朝阳金美镓业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of them stay at the laboratory level, the scale is small, and there are many factors affecting the quality, so the quality is not stable
Electrolytic refining has achieved large-scale production, and the quality is relatively stable. However, due to the problem of lead materials and the multi-channel sources of raw materials, some new impurity elements are brought, and the electrolytic refining method is not very effective; moreover, the electrolytic refining process is long and difficult. Occupies a lot of gallium, strict environmental requirements, and high energy consumption. In the current market competition, it has encountered severe challenges

Method used

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  • Large-scale production method for preparing high purity gallium
  • Large-scale production method for preparing high purity gallium
  • Large-scale production method for preparing high purity gallium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Using the above process conditions, five partial crystallization operations were carried out, and the purification effect is shown in Table 1, wherein S 0 is the raw gallium, S 4 is the solid phase produced by the 4th partial crystallization, S 5 This is the solid phase produced by the 5th partial crystallization.

[0017] Table 1. Content of impurity elements

[0018]

[0019] Note: "---" means not detected; "0" means less than the detection limit

Embodiment 2

[0020] Embodiment 2: Adopt above-mentioned process condition, carry out five partial crystallization operations, wherein S 0 is the raw gallium, S 3 is the solid phase produced by the third partial crystallization, S 4 is the solid phase produced by the 4th partial crystallization, S 5 It is the solid phase produced by the fifth partial crystallization, and the purification effect is shown in Table 2.

[0021] Table 2. Content of impurity elements

[0022]

[0023] Note: "---" means not detected; "0" means less than the detection limit

Embodiment 3

[0024] Example 3: Using the above process conditions, five partial crystallization operations were carried out, and the enrichment of impurities is shown in Table 3. where L 1 : represents the remaining liquid gallium after the first crystallization; L 2 : stands for L 1 Liquid gallium remaining after recrystallization; L 2S : stands for L 2 The solid phase produced after crystallization; L 3 : stands for L 2 Liquid gallium remaining after crystallization; L 3S : stands for L 3 The solid phase produced after crystallization; L 4 : stands for L 3 liquid gallium remaining after crystallization;

[0025] Table 3. Impurity enrichment content

[0026]

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Abstract

The invention discloses a large-scale production method for preparing high purity gallium, which adopts a partial crystallization purification technique to implement the operation, and comprises the following steps of: placing a seed crystal of metal gallium into the bottom part of a crystallization vessel; filling liquid metal gallium into the crystallization vessel; cooling the bottom part of the crystallization vessel, and setting the technical conditions of the fractional crystallization that a temperature gradient is 1.1 to 1.4 DEG C / cm and the temperature is kept uniform in the horizontal direction; and maintaining an average crystallization speed of 3.3 to 4.2g / min and a crystallization interception ratio of 75 to 90 percent. Compared with the prior art, the method has good purification effect, high conversion efficiency, low consumption of electric power and no application of chemical agent and can realize the mass production.

Description

technical field [0001] The invention relates to a purification method, in particular to a large-scale production method for preparing high-purity gallium using a partial crystallization purification process. Background technique [0002] Gallium is an expensive rare metal and one of eleven strategically important rare metals controlled by the state. High-purity gallium is mainly used in microwave communications, lasers, LEDs, high-speed optoelectronic integrated circuits, silicon photovoltaic doping, space solar cells, high-efficiency concentrating triple-junction solar cells, and high-efficiency magnetic materials. [0003] Gallium used in the field of modern electronic science must have a purity of more than 6N, so many methods for purifying gallium have been developed. There are: chemical extraction method, electrolytic refining method, VGF method, regional smelting method and controlled single crystal method. Most of them stay at the laboratory level, the scale is smal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B58/00C22B9/02
CPCY02P10/20
Inventor 范家骅金兰英刘素公刘文兵
Owner 朝阳金美镓业有限公司
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