Chaotic stirring device and method combining plasma arc smelting and permanent magnet

Patent metadata

Field	Value
Publication number	US-11428471-B2
Application number	US-202016743507-A
Country	US
Kind code	B2
Filing date	Jan 15, 2020
Priority date	Feb 14, 2019
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

A chaotic stirring device combining plasma arc smelting and permanent magnet including a furnace body; the furnace body is provided therein with a water-cooled copper crucible; the center of an upper surface of the water-cooled copper crucible is a groove for placing raw metals, and the water-cooled copper crucible is internally a hollow cavity; a return pipe is disposed directly below the groove in the hollow cavity; an upper end of the return pipe is vertical upward, and is horizontally provided with a filter screen; a spherical magnet is placed between the filter screen and the groove; one side of the water-cooled copper crucible is provided with a first water inlet pipe and a first water outlet pipe; the first water inlet pipe is connected to the hollow cavity, and the first water outlet pipe is connected to the bottom of the return pipe.

First claim

What is claimed is:

1. A chaotic stirring device comprising a furnace body, wherein the furnace body comprises a water-cooled copper crucible; the center of an upper surface of the water-cooled copper crucible comprises a groove for placing raw metals; the water-cooled copper crucible comprises an internal hollow cavity, wherein a return pipe is disposed directly below the groove in the hollow cavity; an upper end of the return pipe is vertically upward, and is horizontally provided with a filter screen; a spherical magnet is placed between the filter screen and the groove; one side of the water-cooled copper crucible is provided with a first water inlet pipe and a first water outlet pipe, wherein the first water inlet pipe is connected to the hollow cavity, and the first water outlet pipe is connected to the bottom of the return pipe, to form a water flow passage in the water-cooled copper crucible; wherein a tungsten electrode and a nozzle are disposed directly above the groove, and the tungsten electrode is located inside the nozzle so as to conduct plasma arc smelting.

2. A chaotic stirring method combining plasma arc smelting and permanent magnet, applied to a chaotic stirring device comprising a furnace body, wherein the furnace body comprises a water-cooled copper crucible; the center of an upper surface of the water-cooled copper crucible comprises a groove for placing raw metals; the water-cooled copper crucible comprises an internal hollow cavity, wherein a return pipe is disposed directly below the groove in the hollow cavity; an upper end of the return pipe is vertically upward, and is horizontally provided with a filter screen; a spherical magnet is placed between the filter screen and the groove; one side of the water-cooled copper crucible is provided with a first water inlet pipe and a first water outlet pipe, wherein the first water inlet pipe is connected to the hollow cavity, and the first water outlet pipe is connected to the bottom of the return pipe, to form a water flow passage in the water-cooled copper crucible; wherein the stirring method comprises:
placing raw metals in the groove of the water-cooled copper crucible;
starting a tungsten electrode, and conducting plasma arc smelting of the raw metal in the water-cooled copper crucible; and
opening a water inlet valve and a water outlet valve, to continuously inject cooling water into the water-cooled copper crucible and a nozzle, and continuously discharge water in the water-cooled copper crucible and the nozzle.

3. The chaotic stirring method combining plasma arc smelting and permanent magnet according to claim 2 , wherein the opening a water inlet valve and a water outlet valve, to continuously inject cooling water into the water-cooled copper crucible and a nozzle, and continuously discharge water in the water-cooled copper crucible and the nozzle specifically comprises: opening the water inlet valve and the water outlet valve, setting a flow rate of the water inlet valve to be greater than a flow rate of the water outlet valve, so that the injected cooling water fills the water-cooled copper crucible and the nozzle, and a dynamic balance of the injected cooling water and the discharged cooling water is finally reached.

4. A chaotic stirring method combining plasma arc smelting and permanent magnet, applied to the chaotic stirring device according to claim 2 , wherein
the tungsten electrode and the nozzle are disposed directly above the groove, and the tungsten electrode is located inside the nozzle so as to conduct plasma arc smelting.

5. A chaotic stirring method combining plasma arc smelting and permanent magnet according to claim 2 , wherein the nozzle is a hollow cylindrical structure open below; an inner side of a side wall of the nozzle is provided with an annular cavity along a circumferential direction; the annular cavity communicates with a second water inlet pipe and a second water outlet pipe.

6. A chaotic stirring method combining plasma arc smelting and permanent magnet according to claim 2 , wherein the first water inlet pipe and the second water inlet pipe are connected to a same water inlet valve, and the first water outlet pipe and the second water outlet pipe are connected to a same water outlet valve.

7. A chaotic stirring method combining plasma arc smelting and permanent magnet according to claim 2 , wherein the return pipe is a cylindrical pipe.

8. A chaotic stirring method combining plasma arc smelting and permanent magnet according to claim 2 , wherein a vertical distance between an edge of the upper end of the return pipe and the groove is smaller than a diameter of the spherical magnet, so that the spherical magnet is restricted in a space formed by the filter screen and the groove.

9. The chaotic stirring method combining plasma arc smelting and permanent magnet according to claim 4 , wherein the opening the water inlet valve and the water outlet valve, to continuously inject cooling water into the water-cooled copper crucible and the nozzle, and continuously discharge water in the water-cooled copper crucible and the nozzle specifically comprises: opening the water inlet valve and the water outlet valve, setting a flow rate of the water inlet valve to be greater than a flow rate of the water outlet valve, so that the injected cooling water fills the water-cooled copper crucible and the nozzle, and a dynamic balance of the injected cooling water and the discharged cooling water is reached.

10. The chaotic stirring method combining plasma arc smelting and permanent magnet according to claim 5 , wherein the opening the water inlet valve and the water outlet valve, to continuously inject cooling water into the water-cooled copper crucible and the nozzle, and continuously discharge water in the water-cooled copper crucible and the nozzle specifically comprises: opening the water inlet valve and the water outlet valve, setting a flow rate of the water inlet valve to be greater than a flow rate of the water outlet valve, so that the injected cooling water fills the water-cooled copper crucible and the nozzle, and a dynamic balance of the injected cooling water and the discharged cooling water is reached.

11. The chaotic stirring method combining plasma arc smelting and permanent magnet according to claim 6 , wherein the opening the water inlet valve and the water outlet valve, to continuously inject cooling water into the water-cooled copper crucible and the nozzle, and continuously discharge water in the water-cooled copper crucible and the nozzle specifically comprises: opening the water inlet valve and the water outlet valve, setting a flow rate of the water inlet valve to be greater than a flow rate of the water outlet valve, so that the injected cooling water fills the water-cooled copper crucible and the nozzle, and a dynamic balance of the injected cooling water and the discharged cooling water is reached.

12. The chaotic stirring method combining plasma arc smelting and permanent magnet according to claim 7 , wherein the opening the water inlet valve and the water outlet valve, to continuously inject cooling water into the water-cooled copper crucible and the nozzle, and continuously discharge water in the water-cooled copper crucible and the nozzle specifically comprises: opening the water inlet valve and the water outlet valve, setting a flow rate of the water inlet valve to be greater than a flow rate of the water outlet valve, so that the injected cooling water fills the water-cooled copper crucible and the nozzle, and a dynamic balance of the injected cooling water and the discharged cooling water is reached.

Assignees

• Univ Shanghai

Inventors

• Yu Jianbo
• Ren Zhongming
• Li Xia
• Zhang Zhenqiang
• Wang Jiang
• Zhang Yujia

Classifications

• F27B14/06 Primary

  heated electrically, e.g. induction crucible furnaces with or without any other source of heat (F27B14/04 takes precedence) · CPC title

• F27D2009/0013

  the fluid being water · CPC title

• F27B14/14

  Arrangements of heating devices · CPC title

• F27B2014/0837

  Cooling arrangements · CPC title

• F27D9/00

  Cooling of furnaces or of charges therein (casings, linings, walls or roofs incorporating cooling arrangements F27D1/12) · CPC title