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Radiation-intercepting device of crucible for electron-beam smelting

An electron beam smelting and intercepting device technology, which is applied in the field of metallurgical smelting, can solve problems such as the inability to increase the energy utilization rate of electron beams without limit, and achieve the effects of improving energy utilization rate, simple structure, and convenient manufacture

Inactive Publication Date: 2014-12-10
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can improve the energy utilization rate of the electron beam, it cannot increase the energy utilization rate of the electron beam without limit. If you want to continue to improve the energy utilization rate of the crucible, you need to start from other aspects

Method used

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  • Radiation-intercepting device of crucible for electron-beam smelting
  • Radiation-intercepting device of crucible for electron-beam smelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] as attached figure 1 and figure 2 As shown, a radiation intercepting device for a crucible for electron beam melting includes a radiation intercepting cover, a sliding suspension rod and a vacuum melting device. In the vacuum melting device, the inside of the furnace wall 4 is a melting chamber 8, and a furnace door 7 is installed on the furnace wall , the water-cooling tray 13 is fixedly installed on the bottom of the furnace wall 4, the water-cooling tray is provided with a water inlet 11 and a water outlet 12, the melting crucible 9 is fixedly installed on the water-cooling tray, the vacuum pump unit 1 is fixedly installed on the furnace wall, and the electron gun 3 is fixed Installed on the top of the furnace wall, the radiation intercepting cover 6 is located above the melting crucible, and is movably installed on the top of the furnace wall through the sliding suspension rod 2, and the radiation intercepting cover 6 and the sliding suspension rod 2 are movably co...

Embodiment 2

[0031] Such as figure 1 and figure 2 As shown, a radiation intercepting device for a crucible for electron beam smelting, the device is the same as the device in Example 1 except for the following parts:

[0032] The radiation intercepting shield is located 10cm above the melting crucible, and its orthographic projection is a circle with a radius of 40cm. The radiation intercepting shield is made of graphite.

[0033] There is also an arc-shaped gap 15 at the direct radiation position of the electron beam on the radiation intercepting cover, the radius of the arc-shaped gap is 10cm, and there are 5 sliding suspension rods.

[0034] After performing the comparative experiment as in Example 1, the energy utilization rate of the electron beam was increased by 50%.

Embodiment 3

[0036] Such as figure 1 and figure 2 As shown, a radiation intercepting device for a crucible for electron beam smelting, the device is the same as the device in Example 1 except for the following parts:

[0037] The radiation intercepting shield is located 18cm above the melting crucible, and its orthographic projection is a circle with a radius of 30cm. The radiation intercepting shield is made of quartz.

[0038] There is also an arc-shaped gap 15 at the direct radiation position of the electron beam on the radiation intercepting cover, the radius of the arc-shaped gap is 8cm, and there are 4 sliding suspension rods.

[0039] After performing the comparative experiment as in Example 1, the energy utilization rate of the electron beam was increased by 42%.

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Abstract

The invention belongs to the technical field of metallurgical smelting, and particularly relates to a radiation-intercepting special device for electron-beam smelting. The radiation-intercepting special device is characterized in that a radiation-intercepting cover is positioned above a smelting crucible and movably arranged on the top of a furnace wall through a slidable suspension rod, and the radiation-intercepting cover is movably connected with the slidable suspension rod through a suspending articulated buckle; the radiation-intercepting cover is in a spherical shape, the concave surface of the spherical shape is downward, and the focus point of the concave surface is positioned in the center of the smelting crucible; and the concave surface is provided with an arc-shaped notch. The radiation-intercepting special device disclosed by the invention has the advantages of simple structure and practical function, and is convenient for manufacture, and greatly enhances the utilization ratio of electron-beam energy by the amplitude of 20%-50% because the radiation-intercepting cover can intercept the heat radiation beams of a silicon fusant and electron-beams reflected by the surface of the silicon fusant back to act on the surface of the silicon fusant again.

Description

technical field [0001] The invention belongs to the technical field of metallurgical smelting, in particular to a radiation intercepting device for electron beam smelting. Background technique [0002] At present, the preparation of polysilicon materials for solar cells has formed a large-scale production worldwide. The main preparation method is the improved Siemens method, but its comprehensive power consumption is as high as 170kW h / kg, and the production is intermittent, which cannot be formed in the production of Si. Continuous operation, and this method adopts backward thermal chemical vapor deposition in the core link of the process. There are too many links in the process flow, and the primary conversion rate is low, which leads to too long process time and increases material consumption and energy consumption costs. [0003] For this reason, countries all over the world are actively exploring a new process for preparing high-purity silicon materials. Among them, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/037
Inventor 谭毅姜大川石爽温书涛邹瑞洵
Owner DALIAN UNIV OF TECH