CN212443158U

CN212443158U - Vacuum melting atmosphere protection semi-continuous casting system

Info

Publication number: CN212443158U
Application number: CN202022205661.1U
Authority: CN
Inventors: 王风德; 董春波; 王肇飞; 滕宗涛
Original assignee: Yantai Wanlong Vacuum Metallurgy Co ltd
Current assignee: Yantai Wanlong Vacuum Metallurgy Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-02-02
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a vacuum melting atmosphere protection semi-continuous casting system, including melting equipment, casting equipment and former. The utility model discloses the semi-continuous casting system of vacuum melting atmosphere protection all can avoid the contact of high temperature molten metal and air at whole casting in-process, has avoided liquid metal to burn to lose under high temperature state to prepare out the metal product that composition content is even, stable performance, provide a reliable technological method and equipment for the special alloy continuous casting that contains active easy oxidation element.

Description

Vacuum melting atmosphere protection semi-continuous casting system

Technical Field

The utility model relates to a metal smelting field especially relates to a vacuum melting atmosphere protection semicontinuous casting system.

Background

Vacuum melting is a special melting technology for melting metal and alloy under vacuum condition, wherein the melting atmosphere is vacuum condition, and the vacuum melting can avoid the contact of the melted metal and the reaction gases of oxygen, nitrogen, hydrogen and the like in the air. The vacuum melting chamber is a common vacuum melting device, metal can be melted under the vacuum condition to obtain casting liquid with higher quality, and the casting blank at the outlet of the crystallizer needs to be cooled by water in common semi-continuous casting, so that the blank shell of the casting blank can not be effectively sealed in vacuum, and the liquid level of the crystallizer and the liquid level of the vacuum protection chamber are subjected to atmosphere protection casting in the casting process. Vacuum overflow in vacuum smelting realizes copper liquid degassing, and atmosphere protection drawing casting prevents harmful gas from re-intruding in the drawing casting process. Greatly reduces the burning loss of the easily oxidized elements in the copper liquid, stabilizes the alloy components of the product and ensures the product performance.

Disclosure of Invention

The utility model discloses to the problem of section bar surface contact air when casting shaping is smelted to current intermittent type formula vacuum, provide a semi-continuous casting system of vacuum melting atmosphere protection. The utility model discloses a system includes melting equipment, casting equipment and former, and melting equipment is the vacuum melting room that fixes on the metal frame, and the vacuum melting room is furnished with evacuation equipment and inert gas air feeder, and vacuum melting room lateral wall is equipped with the gate valve; the casting equipment comprises a vacuum protection chamber and a bottom pouring furnace, the vacuum protection chamber is a sealable vacuum protection chamber, a liquid guide groove is arranged on the side surface of the vacuum protection chamber and can be in sealed butt joint with a gate valve, an opening of the bottom pouring furnace is parallel to the bottom surface of the vacuum protection chamber, a liquid outlet of the liquid guide groove is arranged above the opening of the bottom pouring furnace, a casting water gap is arranged at the bottom of the bottom pouring furnace and is matched with a stopper rod capable of moving up and down, a detachable protective cover is arranged at the liquid outlet end of the casting water gap, sealing before vacuum overflowing and the vacuum protection chamber is filled with protective gas is ensured, the vacuum protection chamber is matched with vacuumizing equipment and inert gas supply equipment, and the casting equipment; the forming equipment comprises a crystallizer and a casting well, the crystallizer is fixed on a crystallizer trolley and is detachably connected with a liquid outlet of a casting nozzle, the crystallizer is matched with a dummy bar, the casting well is arranged right below the crystallizer, and spray water equipment is arranged in the casting well.

The utility model discloses not following the direct casting in the vacuum melting room, but set up mobilizable casting equipment, treat that casting liquid shifts to casting equipment back vacuum melting room and can continue to smelt to realize semicontinuous casting. The utility model discloses the semi-continuous casting system of vacuum melting atmosphere protection all can avoid the contact of high temperature molten metal and air at whole casting in-process, has avoided liquid metal to burn to lose under high temperature state to prepare out the metal product that composition content is even, stable performance, provide a reliable technological method and equipment for the special alloy continuous casting that contains active easy oxidation element.

The effect of crystallizer is that the casting liquid reaches the best casting state before the casting suitably cools down, and the pouring mouth of a river passes through the elasticity sealed cowling with the crystallizer and is connected, and the elasticity sealed cowling is fixed on the crystallizer, the utility model discloses can set up hydraulic lifting equipment on the crystallizer dolly, through height-adjusting, make the crystallizer and the pouring mouth of a river be airtight connection when being connected.

Preferably, the liquid outlet end of the casting nozzle is provided with a detachable protective cover, the bottom of the vacuum protective chamber is sealed by the protective cover when the vacuum protective chamber is vacuumized and overflowed and before protective gas is filled to the micro positive pressure, the protective cover is sealed and protected by the elastic sealing cover during the casting operation, and the protective gas is filled between the liquid level of the crystallizer and the casting nozzle to prevent the atmosphere from invading, so that no matter whether the smelting equipment is contacted with the casting equipment or not, the air cannot enter the inside of the system.

Preferably, the dummy bar is provided with a casting machine, which is installed in the casting well. The arrangement of the casting machine is beneficial to demolding and molding of the casting. The spray well is arranged underground and is in sealed contact with the blank pulling device, so that the section bar is not in contact with excessive oxygen or nitrogen in the cooling process, the maximum depth of the spray well is 15 meters, the spray well is suitable for preparing bar blanks or plate blanks with certain length, and continuous bar blanks or plate blanks cannot be prepared, so the spray well is called semi-continuous casting.

The utility model discloses not from the direct casting in the vacuum melting room, but the vacuum melting room is smelted, opens the gate valve between melting room and the casting room after the vacuum melting finishes, and the copper water chute gets into under the pneumatic cylinder promotes and overflows the position, and the copper water gets into the end by the smelting furnace through the chute and annotates the stove. And then the chute returns to close the gate valve, the vacuum smelting chamber continues smelting, a vacuum protection chamber of the casting chamber is filled with protective gas to slight positive pressure, the sealing of a bottom pouring gate is removed, the crystallizer trolley moves to a casting position, the dummy bar rises to enter the crystallizer, the stopper rod and the casting machine are opened to start casting operation, the casting is finished, the casting chamber moves to a billet ejection position, the crystallizer trolley moves to a preparation position, and the casting billet is lifted out by the crane.

Drawings

FIG. 1 is a schematic structural view of the present invention during operation;

FIG. 2 is a schematic structural view after the detachment of the present invention;

FIG. 3 is a schematic structural view of the split back-bottom pouring furnace of the present invention;

FIG. 4 is a schematic structural view of the bottom pouring furnace in operation of the utility model;

each part is as follows:

1. the device comprises a vacuum smelting chamber, 2, a gate valve, 3, a vacuum protection chamber, 4, a liquid guide groove, 5, a bottom pouring furnace, 6, a pouring nozzle, 7, a stopper rod, 8, a guide rail, 9, a crystallizer, 10, a dummy bar, 11, a crystallizer trolley, 12, a casting well, 13, a protection cover, 14 and an elastic sealing cover.

Detailed Description

The present invention is described below with reference to examples, which are only used to explain the present invention and are not used to limit the scope of the present invention.

Example 1

As shown in fig. 1-4, a vacuum melting atmosphere protection semi-continuous casting system comprises a melting device, a casting device and a forming device, wherein the melting device is a vacuum melting chamber 1 fixed on a metal frame, the vacuum melting chamber 1 is provided with a vacuum pumping device and an inert gas supply device, and the side wall of the vacuum melting chamber 1 is provided with a gate valve 2; the casting equipment comprises a vacuum protection chamber 3 and a bottom pouring furnace 5, the vacuum protection chamber 3 is a sealable vacuum protection chamber 3, a liquid guide groove 4 is arranged on the side surface of the vacuum protection chamber 3 and can be in close butt joint with a gate valve 2, the opening of the bottom pouring furnace 5 is parallel to the bottom surface of the vacuum protection chamber 3, the liquid outlet of the liquid guide groove 4 is arranged above the opening of the bottom pouring furnace 5, a pouring nozzle 6 is arranged at the bottom of the bottom pouring furnace 5, the pouring nozzle 6 is matched with a stopper rod 7 capable of moving up and down, a detachable protective cover 13 is arranged at the liquid outlet end of the pouring nozzle 6, the vacuum protection chamber 3 is matched with vacuum pumping equipment and inert gas supply equipment, and the casting equipment; the forming equipment comprises a crystallizer 9 and a casting well 12, the crystallizer 9 is fixed on a crystallizer trolley 11, the crystallizer trolley 11 is provided with hydraulic lifting equipment, the crystallizer 9 is in closed connection when being connected with a casting nozzle 6, the casting nozzle 6 is connected with the crystallizer 9 through an elastic sealing cover 14, the elastic sealing cover 14 is fixed on the crystallizer 9, the crystallizer 9 is matched with a dummy bar 10, the casting well 12 is arranged under the crystallizer 9, spray water equipment is arranged in the casting well 12, the dummy bar 10 is matched with a casting machine, and the casting machine is arranged in the casting well 12.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A vacuum melting atmosphere protection semi-continuous casting system is characterized by comprising melting equipment, casting equipment and forming equipment,

the smelting device is a vacuum smelting chamber fixed on the metal frame, the vacuum smelting chamber is provided with a vacuumizing device and an inert gas supply device, and the side wall of the vacuum smelting chamber is provided with a gate valve;

the casting equipment comprises a vacuum protection chamber and a bottom pouring furnace, wherein the vacuum protection chamber is a sealable vacuum protection chamber, a liquid guide groove is arranged on the side surface of the vacuum protection chamber and can be in close butt joint with the gate valve, the opening of the bottom pouring furnace is parallel to the bottom surface of the vacuum protection chamber, the liquid outlet of the liquid guide groove is arranged above the opening of the bottom pouring furnace, a pouring nozzle is arranged at the bottom of the bottom pouring furnace and is matched with a stopper rod capable of moving up and down, the vacuum protection chamber is matched with vacuumizing equipment and inert gas supply equipment, and the casting equipment is arranged on a guide rail;

the forming equipment comprises a crystallizer and a casting well, the crystallizer is fixed on a crystallizer trolley and is detachably connected with a liquid outlet of the casting nozzle, the crystallizer is matched with a dummy bar, the casting well is arranged right below the crystallizer, and spray water equipment is arranged in the casting well.

2. The vacuum melting atmosphere protected semi-continuous casting system of claim 1, wherein the casting nozzle is connected with the crystallizer through an elastic sealing cover, and the elastic sealing cover is fixed on the crystallizer.

3. The vacuum melting atmosphere protected semi-continuous casting system of claim 1, wherein the pouring nozzle outlet end is provided with a removable protective cover.

4. The vacuum melting atmosphere protected semi-continuous casting system of claim 1, wherein the crystallizer trolley is provided with a hydraulic lifting device, and the crystallizer is hermetically connected with the casting nozzle when being connected.

5. The vacuum melting atmosphere protected semi-continuous casting system of claim 1, wherein the dummy bar is fitted with a strand casting machine, the strand casting machine being mounted in the casting well.

6. The vacuum melting atmosphere protected semi-continuous casting system of claim 1, wherein the casting well has a maximum depth of 15 meters.