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Germanium reduction directional crystallization furnace and crystallization method

A technology of directional crystallization and crystallization, which is applied in the field of metallurgy, can solve the problems of large equipment footprint, small production capacity of a single unit, and high energy consumption, and achieve the effects of compact structure design, easy operation, and cost saving

Pending Publication Date: 2020-05-19
YANGZHOU NINGDA NOBLE METAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reduction technology of germanium dioxide generally adopts hydrogen reduction melting casting technology, which does not make full use of heat energy, and intermittent reduction every time the furnace is stopped for cooling and reheating, the energy consumption is extremely high, the equipment occupies a large area, and the single production capacity is small. The life of frequent heating and cooling is low; and the existing reduction furnace does not have the function of purification, it is only cast into ingots, and the energy is not fully utilized

Method used

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  • Germanium reduction directional crystallization furnace and crystallization method
  • Germanium reduction directional crystallization furnace and crystallization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The graphite boat contains germanium dioxide, and then it is pushed to the low-temperature reduction zone of the first tube section for reduction at a temperature of 680°C. The reduction time in this zone is long, and most of the germanium oxide is reduced to metal germanium powder. The bottom part of the graphite boat is not reduced through. The germanium dioxide continues to run until the temperature of the high-temperature reduction section of the second pipe section is 790°C, where it is rapidly reduced, then runs to the temperature of the third pipe section and melts at 1040°C, and finally enters the fourth pipe section at a constant temperature of 970°C to make the germanium liquid uniform Distributed in the graphite boat, crystallization is carried out slowly at the advancing speed of 4mm / min.

Embodiment 2

[0032] The germanium dioxide contained in the graphite boat is pushed to the low-temperature reduction zone of the first tube section for reduction at a temperature of 750°C. The reduction time in this zone is long, and most of the germanium oxide is reduced to metal germanium powder. The unreduced germanium dioxide at the bottom of the graphite boat The germanium oxide continues to run until the temperature in the high-temperature reduction section of the second pipe section is 880°C, where it is quickly reduced, then runs to the temperature of the third pipe section and melts at 940°C, and finally enters the fourth pipe section at a constant temperature of 1010°C, so that the germanium liquid is evenly distributed in the In the graphite boat, the crystallization was carried out slowly at a propulsion speed of 4 mm / min.

Embodiment 3

[0034] The germanium dioxide contained in the graphite boat is pushed to the low-temperature reduction zone of the first tube section for reduction at a temperature of 715°C. The reduction time in this zone is long, and most of the germanium oxide is reduced to metal germanium powder. The germanium oxide continues to run until the temperature in the high-temperature reduction section of the second pipe section is 835°C, where it is rapidly reduced, then runs to the temperature of the third pipe section and melts at 980°C, and finally enters the fourth pipe section at a constant temperature of 1010°C, so that the germanium liquid is evenly distributed in the In the graphite boat, the crystallization was carried out slowly at a propulsion speed of 5 mm / min.

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Abstract

The invention discloses a germanium reduction directional crystallization furnace and a crystallization method. The crystallization furnace comprises a shell, a feeding pipe, a discharging pipe, a heating pipe and a propelling mechanism. A feeding port is formed in one end of the shell, a discharging port is formed in the other end of the shell, a hydrogen inlet is formed in the discharging port of the shell, and igniters are arranged at the feeding port and the discharging port of the shell. The feeding pipe is arranged in one end of the shell and connected with the feeding port, and the discharging pipe is arranged in the other end of the shell and connected with the discharging port. A hydrogen inlet is formed in the pipe wall of the feeding pipe, and a graphite boat is arranged in thefeeding pipe. A hydrogen inlet is formed in the pipe wall of the discharging pipe, and the discharging pipe is sleeved with a water cooling sleeve. The heating pipe is horizontally arranged in the shell, one end of the heating pipe is connected with one end of the feeding pipe, and the other end of the heating pipe is connected with one end of the discharging pipe. The propelling mechanism is arranged at the end, provided with the feeding port, of the shell. Reduction heat energy is fully utilized, germanium melting and crystallization are conducted at the same time, reduction and germanium ingot purification are organically combined, operation is convenient, and the structure is designed to be compact.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a germanium reduction directional crystallization furnace and a crystallization method. Background technique [0002] Germanium is an important scattered metal element. Its elemental metal and its compounds are widely used in semiconductors, electronics industry, atomic energy industry, national defense and military, etc. The reduction technology of germanium dioxide generally adopts hydrogen reduction melting casting technology, which does not make full use of heat energy, and intermittent reduction every time the furnace is stopped for cooling and reheating, the energy consumption is extremely high, the equipment occupies a large area, and the single production capacity is small. The life of frequent heating and cooling is low; and the existing reduction furnaces do not have the function of purification, they are only cast into ingots, and the energy cannot be fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/08C30B11/00
CPCC30B29/08C30B11/00C30B11/003C30B11/006
Inventor 樊启鸿李静
Owner YANGZHOU NINGDA NOBLE METAL CO LTD
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