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Equipment of non-vacuum smelting easy oxidation metal and alloy

An easily oxidizable metal, non-vacuum smelting technology, applied in the field of equipment for smelting easily oxidizable metals and alloys, and smelting equipment for easily oxidizable metals and alloys, can solve the problem of limited industrialization prospects, inability to perform composition measurement, composition adjustment, vacuum furnace Discontinuous operation, etc.

Inactive Publication Date: 2006-11-29
苏州有色金属研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the method of vacuum smelting has the following problems: ① Due to the high degree of vacuum required in the smelting process of the vacuum furnace, the requirements for the sealing of the furnace body are very high, and operations such as composition measurement, composition adjustment, and slag removal cannot be performed during smelting, so The composition and impurity content of raw materials are very high; ②Vacuum smelting generally does not adopt the method of rapid cooling, the ingot is prone to crystal coarsening, and cracks are easy to appear in the deformation process, which reduces the yield of the strip; ③Vacuum furnace The discontinuous operation itself makes it only possible to carry out small-scale production, and cannot carry out continuous large-scale production, which limits its industrialization prospects

Method used

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  • Equipment of non-vacuum smelting easy oxidation metal and alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The raw materials of electrolytic copper, copper-chromium intermediate alloy and zinc are respectively taken, and the amount of materials taken is shown in Table 1, and loaded into the furnace 8 from the feeding port 7, so that it is contained in the crucible 16; the furnace cover 2 can also be opened to directly add raw materials. Cover the feeding port 7 and the observation window 1, open the protective gas valve, and pass in argon gas from the upper air inlet 3 until the air is discharged from the upper gas outlet 5, the protective gas is filled with the furnace 8, and the match will be lit at the upper gas outlet 5. Immediately extinguished. Open the induction heating device 10 to heat the induction furnace body, the power is 10KW, the time is 10 minutes, the power adjustment is 50KW, and heating is until melting. The whole heating process can be observed in the observation window 1. Add copper-clad zirconium and magnesium from the feeding port 7, smelt for 5 minute...

Embodiment 2

[0019] The present invention is carried out under the same conditions as in Example 1 by using zirconium wire instead of copper-clad zirconium. The chemical contents of raw materials and ingots are shown in Table 2. The loss rates of each metal during the smelting process are: Cu≤1.0%, Cr≤3.4% and Zr≤7.2%.

[0020] raw material

Embodiment 3

[0022] Adopt the same condition as embodiment 1, adopt N 2 In order to protect the gas, use a gas nozzle to extend into the melt from the feeding port 7 during the heat preservation process after smelting, and inject N 2 Pass into the melt for degassing. The chemical content of raw materials and ingots is shown in Table 3. According to the metallographic photos, it can be seen that the structure of the ingot is significantly improved, and the pores and inclusions are reduced. The loss rates of each metal during the smelting process are: Cu≤1.1%, Cr≤3.4% and Zr ≤7.1%.

[0023] raw material

[0024] The above examples show that the present invention uses a non-vacuum method to melt and cast easily oxidizable metals and alloys in a protective gas atmosphere. In the protective gas layer, the partial pressure of oxygen and hydrogen is very small, which accelerates the process of oxygen in the melt. Diffusion of oxygen and hydrogen, the density of oxygen and hydrogen is ...

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Abstract

The invention provides a device for non-vacuum smelting easy- to-oxidize metals and alloys, and its main parts comprise furnace body and furnace cover, where the furnace body is equipped with a heater, and a pot is placed inside the furnace body; and the furnace cover has an gas inlet, an gas outlet and a feed inlet and is equipped with a cooling mechanism; the bottom of the hearth is equipped with a bottom pouring orifice, a vertical stopper is arranged inside the furnace body, the lower end of the stopper is connected with the bottom pouring orifice, the upper end of the stopper is equipped with an adjustment mechanism which adjusts the vertical position of the stopper to prevent metal melt from flowing down in the smelting course; the lower side of the furnace body is directly connected with a crystallizer or iron mold, it adopts a down-pouring mode and the connecting channel is made with an gas inlet and an gas outlet. And its whole smelting and casting course is performed in the industrial pure protective gas, having low melting loss rate and good deoxidizing and dehydrogenating effects, easy to implement large-scale continuous operation and obviously improving the pouring quality.

Description

technical field [0001] The invention relates to melting equipment for easily oxidizable metals and alloys, in particular to equipment for melting easily oxidizable metals and alloys under non-vacuum conditions, and belongs to the technical field of nonferrous metal processing. Background technique [0002] The traditional smelting method of easily oxidized metals and alloys is vacuum smelting. The main process is: firstly mix the alloy elements in proportion, put them into the vacuum furnace, and put the mold into the vacuum furnace at the same time, and evacuate to 10 -3 The heating and smelting starts below the Pa, and the casting is directly carried out in a vacuum furnace after the smelting is completed. This smelting method, due to the high vacuum in the furnace, the gas partial pressure of oxygen is extremely low, which kinetically prevents the oxidation and burning of the smelted metal. During the smelting process, the melt contains a certain amount of oxygen and hyd...

Claims

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Application Information

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IPC IPC(8): F27B14/00B22D11/00B22D47/00
Inventor 郭富安慕思国曹兴民向朝建杨春秀朱雯
Owner 苏州有色金属研究院有限公司
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