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Cold crucible induction smelting method using ultrahigh smelting temperature

A technology of induction smelting and melting temperature, which is applied in cold crucible induction smelting and raised to over 3000°C, which can solve the problems of increasing the electromagnetic field energy of the crucible, increasing equipment, increasing energy consumption and cost, etc.

Inactive Publication Date: 2017-06-13
李蔚晶
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, for metals and alloys with higher melting points, further increasing the electromagnetic field energy in the crucible will greatly increase the cost of high-frequency power in equipment investment, and increase the energy consumption and cost of equipment operation to an unbearable level

Method used

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  • Cold crucible induction smelting method using ultrahigh smelting temperature
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  • Cold crucible induction smelting method using ultrahigh smelting temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] Cold crucible induction melting equipment is composed of vacuum melting chamber 01, induction power supply 02, vacuum unit 03, cooling system 04, control system 05 and other parts (see figure 1 ). The vacuum melting chamber is equipped with a water-cooled copper crucible 06 and an induction coil 07 surrounding the crucible. The inner diameter of crucible 06 is 120mm, divided into 24 petals, see the structure figure 2 , which is a crucible equipped with cooling water channels only on the crucible wall. In order to improve the melting temperature, a water-cooled red copper crucible cover 17 (see Figure 5 ). The diameter of the crucible cover is 180 mm, and there are four slits with a width of 2 mm. The distance between the crucible cover and the top of the crucible is 20 mm.

[0098] The rated power of the induction power supply 02 is 200kw, the working voltage is 500V, the output frequency is 25kHz, and 5kg of metal vanadium is loaded into the crucible 06. Start t...

Embodiment 2

[0101] The power and frequency of the equipment used, the power supply, and the structure of the crucible cover are all the same as in Example 1. The water-cooled crucible 06 has an inner diameter of 80 mm and is divided into 22 pieces. The cooling water path in the crucible adopts a structure in which radial branch cooling water paths 26 are arranged at the bottom of the crucible in addition to the cooling water path of the crucible wall (see Figure 8 ).

[0102] The crucible contained 2 kg of niobium metal. Start the induction power supply, and when the current intensity reaches 260A, the charge begins to melt. At this time, turn the crucible lid to the top of the crucible, and after 4 minutes of heat preservation, the metal niobium is completely melted (see Figure 14). The results of melting niobium metal showed that the melting temperature reached 2600°C. The crucible remained intact after smelting.

Embodiment 3

[0104] The equipment used, the power and frequency of the power supply, and the structure of the crucible lid are also the same as in Example 1. The inner diameter of the water-cooled crucible is 80mm, divided into 20 pieces. The cooling water path of the crucible flap is also provided with a radial branch cooling water path 26 at the bottom of the crucible (see Figure 8 ). In addition, a circular hole with a diameter of 24 mm is made in the center of the bottom of the crucible, and a red copper crucible plug 27 of a simple structure with a diameter of 24 mm is installed. The structure is shown in Figure 11 . The crucible plug is divided into 12 petals, the height of the petal area 28 is 15 mm, and the cooling water channel area 29 is located below the petal area.

[0105] Crucible 06 was filled with 1.5 kg of molybdenum metal. Start the induction power supply, and when the current intensity reaches 300A, the charge begins to melt. At this time, turn the crucible cover ...

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Abstract

The invention relates to a cold crucible induction smelting method with ultra-high smelting temperature. Auxiliary energy device; (3) Set a branch cooling waterway at the bottom of the water-cooled copper crucible. The branch cooling waterway is to make a radial branch hole extending to the center of the bottom at the bottom of the crucible, and make the outer end of the radial branch hole and the crucible The cooling holes in the petals are connected to the main hole; (4) The water-cooled copper crucible is made into a shape with a hole in the bottom, and it is blocked by a separate water-cooled red copper crucible with a water supply jacket and a return water jacket at the bottom The bottom hole of the crucible and the upper part of the crucible plug are in the shape of petals. Its advantages are: the melting temperature of the induction cold crucible technology is increased to higher than 2000°C, even higher than 3000°C, and the application field of the induction cold crucible technology is extended to almost all refractory metals and high melting point precious metals.

Description

technical field [0001] The invention relates to a cold crucible induction melting method with ultra-high melting temperature, especially a method for raising the melting temperature of cold crucible induction melting equipment to more than 2000°C, especially to more than 3000°C, which belongs to electromagnetic levitation The technical field of smelting. Background technique [0002] (Vacuum) electromagnetic levitation smelting technology refers to the technology that makes the molten material in a suspended or quasi-suspended state during the smelting process. Vacuum smelting technology eliminates the pollution of gas molecules to materials, and suspension smelting technology further eliminates the pollution caused by crucible materials on this basis. Therefore, it is an ideal smelting technology and belongs to the most advanced material preparation technology in the contemporary era. [0003] Cold crucible vacuum induction melting technology (hereinafter referred to as "...

Claims

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Application Information

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IPC IPC(8): F27B14/04F27B14/10
CPCF27B14/04F27B14/10F27B2014/045F27B2014/108
Inventor 李蔚晶
Owner 李蔚晶
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