CN113322387A

CN113322387A - Device for secondary continuous refining and deslagging of molten aluminum and using method

Info

Publication number: CN113322387A
Application number: CN202110608420.8A
Authority: CN
Inventors: 刘康; 许向东; 陈波; 聂兆军; 岳荣江; 杨业峰
Original assignee: Taian Qicheng Wheel Manufacturing Co ltd
Current assignee: Taian Qicheng Wheel Manufacturing Co ltd
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2021-08-31

Abstract

The invention relates to the field of aluminum liquid refining, and discloses a device for secondary continuous refining deslagging of aluminum liquid and a use method thereof. The refining agent nitrogen mixing adding pipe is stretched into at an upper opening of the aluminum liquid tundish, the left end part of the refining agent nitrogen mixing adding pipe is connected with a first nitrogen inlet pipe, the first nitrogen inlet pipe is connected with a lower opening of a three-way shunt valve, the three-way shunt valve is connected with a nitrogen inlet main pipe, the three-way shunt valve is further connected with the bottom of a second nitrogen inlet pipe, the upper end part of the second nitrogen inlet pipe is communicated with a tank body, a refining agent adding pipe is arranged at the bottom of the tank body, and the bottom of the refining agent adding pipe is connected with the refining agent nitrogen mixing adding pipe. The method is simple to operate, convenient to use and suitable for secondary refining of the molten aluminum.

Description

Device for secondary continuous refining and deslagging of molten aluminum and using method

Technical Field

The invention relates to the field of molten aluminum refining, in particular to a device for secondary continuous refining deslagging of molten aluminum and a using method.

Background

The A356 alloy is a process of continuously generating inclusions and gas content, and is also a process of continuously deslagging and degassing in the smelting process. The aluminum liquid is refined, namely, slag removal and degassing processes, and along with the improvement of the requirements of customers on the appearance quality of products, the cleanliness of the aluminum liquid is higher and higher. Degassing in the casting ladle is mainly for reducing hydrogen content in the aluminium liquid to reduce the appearance of product surface pinhole problem (mostly go on with nitrogen gas and graphite rotor), but remove hydrogen in-process (about time is 20 minutes) aluminium water and oxygen in the air and produce the reaction, generate the oxidation and press from both sides the sediment, make aluminium liquid secondary pollution, the aluminium liquid contains the sediment volume and increases, during casting production, the sediment hole appears on the product surface easily, influences the surface quality of product.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a device for secondary continuous refining and deslagging of molten aluminum and a using method thereof, and the device and the using method can be used for secondary refining of the molten aluminum in a casting ladle, so that the hydrogen content in the molten aluminum can be effectively reduced in the degassing process, the oxidation slag inclusion caused by too long contact time between the molten aluminum and air can be reduced, and the quality of the purified molten aluminum can be improved.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a device that is used for concise slagging-off of aluminium liquid secondary continuous type which characterized in that: ladle in the middle of including aluminium liquid, aluminium liquid tundish upper shed department stretch into refining agent nitrogen gas mixture filling pipe, refining agent nitrogen gas mixture filling pipe left end upside be connected with first nitrogen gas intake pipe lower extreme, first nitrogen gas intake pipe upper end is connected with three-way shunt valve under shed, three-way shunt valve left opening is connected with nitrogen gas inlet main pipe, three-way shunt valve upper shed is connected with second nitrogen gas intake pipe bottom, second nitrogen gas intake pipe upper end is linked together with the jar body, jar body bottom is equipped with refining agent filling pipe, refining agent filling pipe bottom is connected with refining agent nitrogen gas mixture filling pipe, the jar body be fixed in on the support.

Preferably, the left end part of the refining agent nitrogen mixing and adding pipe is provided with a first nitrogen adjusting valve.

Preferably, the first nitrogen inlet pipe is provided with a second nitrogen regulating valve.

Preferably, the nitrogen main air inlet pipe is provided with a third nitrogen regulating valve.

Preferably, a fourth nitrogen regulating valve is arranged on the second nitrogen inlet pipe.

Preferably, the refining agent feeding pipe is provided with a refining agent regulating valve.

Preferably, the support include the diaphragm, the diaphragm right-hand member inlay the recess of shelving the jar body, the recess bottom surface is inlayed and is added the pipe complex through-hole with refining agent, the diaphragm left end and riser right flank fixed connection, riser bottom surface and fixing base upper surface fixed connection.

Preferably, the top of the tank body is provided with a tank body cover.

The invention also provides a use method of the secondary continuous refining deslagging device for the molten aluminum, which is characterized by comprising the following steps: the device for secondary continuous refining and deslagging of the aluminum liquid is connected with gas (nitrogen) used for degassing, a proper amount of refining agent and deslagging agent are added into the casting body (according to the process control requirement), the refining agent (the outlet of the refining agent needs to be designed by increasing the flow) is injected into the aluminum water (the vortex aluminum water formed by rotation of the rotor) through pressure while the aluminum liquid is introduced into the molten aluminum through the nitrogen during degassing, and the refining treatment is carried out while degassing is carried out, so that the purpose of purifying the aluminum liquid is achieved.

Compared with the prior art, the invention provides a device for secondary continuous refining and deslagging of molten aluminum, which has the following beneficial effects:

1. according to the invention, the appropriate refining agent slagging agent is added during degassing of the transfer ladle (nitrogen), the refining agent is brought into the molten aluminum by using the rotation of the graphite rotor (the addition amount of the refining agent is matched with the flow of the nitrogen during degassing, and the refining agent is stopped being added 5 minutes before the degassing is finished), and the molten aluminum in the ladle is secondarily refined, so that the hydrogen content in the molten aluminum can be effectively reduced in the degassing process, the oxidation slag inclusion caused by overlong contact time of the molten aluminum and air can be reduced, the quality of the molten aluminum is purified, and cleaner molten aluminum raw materials are provided for the subsequent die casting production.

2. The support can support the tank body through the arrangement of the support.

3. The invention can respectively adjust and control the filling amount of the nitrogen and the refining agent by arranging the plurality of nitrogen adjusting valves and the plurality of refining agent adjusting valves.

Drawings

FIG. 1 is a schematic front view of the present invention;

fig. 2 is a partially enlarged schematic view of fig. 1.

The following are marked in the figure: 1. a tank body; 2. a tank cover; 3. a nitrogen inlet; 4. a fourth nitrogen regulating valve; 5. a second nitrogen inlet pipe; 6. a three-way shunt; 7. a nitrogen gas inlet main pipe; 8. a third nitrogen regulating valve; 9. a second nitrogen regulating valve; 10. a first nitrogen inlet pipe; 11. a first nitrogen regulating valve; 12. a refining agent regulating valve; 13. a refining agent addition pipe; 14. mixing and adding refining agent nitrogen into a pipe; 15. a refining agent; 16. a support; 17. and (4) molten aluminum tundish.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, a device for secondary continuous refining deslagging of aluminum liquid comprises an aluminum liquid tundish 17, wherein a refining agent nitrogen mixing adding pipe 14 extends into an upper opening of the aluminum liquid tundish 17, the upper side of the left end of the refining agent nitrogen mixing adding pipe 14 is connected with the lower end of a first nitrogen inlet pipe 10, the upper end of the first nitrogen inlet pipe 10 is connected with the lower opening of a three-way shunt valve 6, the left opening of the three-way shunt valve 6 is connected with a nitrogen inlet main pipe 7, the upper opening of the three-way shunt valve 6 is connected with the bottom of a second nitrogen inlet pipe 5, the upper end of the second nitrogen inlet pipe 5 is communicated with a tank body 1, a refining agent adding pipe 13 is arranged at the bottom of the tank body 1, the bottom of the refining agent adding pipe 13 is connected with the refining agent nitrogen mixing adding pipe 14, and the tank body 1 is fixed on a support 16. The top of the tank body 1 is provided with a tank body cover 2.

In the above embodiment, specifically, the left end of the refining agent nitrogen mixing and feeding pipe 14 is provided with a first nitrogen adjusting valve 11. And a second nitrogen regulating valve 9 is arranged on the first nitrogen inlet pipe 10. And a third nitrogen regulating valve 8 is arranged on the nitrogen main air inlet pipe 7. And a fourth nitrogen regulating valve 4 is arranged on the second nitrogen inlet pipe 5. The refining agent feeding pipe 13 is provided with a refining agent regulating valve 12.

In the above embodiment, more specifically, the bracket 16 includes a horizontal plate 161, a groove (not shown) for placing the tank body is embedded at the right end of the horizontal plate 161, a through hole (not shown) matched with the refining agent feeding pipe is embedded at the bottom surface of the groove, the left end of the horizontal plate 161 is fixedly connected with the right side surface of the vertical plate 162, and the bottom surface of the vertical plate 162 is fixedly connected with the upper surface of the fixing seat 163.

The using method comprises the following steps: the device for secondary continuous refining and deslagging of the aluminum liquid is connected with gas (nitrogen) used for degassing, a proper amount of refining agent 15 and deslagging agent (according to the process control requirement) are added into the casting body 1, the aluminum liquid is introduced through the nitrogen during degassing, meanwhile, the refining agent 15 (the outlet of the refining agent needs to be designed by increasing the flow) is injected into the aluminum liquid (the vortex aluminum liquid formed by rotation of the rotor) through pressure, and the refining treatment is carried out while degassing is carried out, so that the purpose of aluminum liquid purification is achieved.

The components used in the present invention are all common standard components or components known to those skilled in the art, and the structure and principle thereof are well known to those skilled in the art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a device that is used for concise slagging-off of aluminium liquid secondary continuous type which characterized in that: ladle in the middle of including aluminium liquid, aluminium liquid tundish upper shed department stretch into refining agent nitrogen gas mixture filling pipe, refining agent nitrogen gas mixture filling pipe left end upside be connected with first nitrogen gas intake pipe lower extreme, first nitrogen gas intake pipe upper end is connected with three-way shunt valve under shed, three-way shunt valve left opening is connected with nitrogen gas inlet main pipe, three-way shunt valve upper shed is connected with second nitrogen gas intake pipe bottom, second nitrogen gas intake pipe upper end is linked together with the jar body, jar body bottom is equipped with refining agent filling pipe, refining agent filling pipe bottom is connected with refining agent nitrogen gas mixture filling pipe, the jar body be fixed in on the support.

2. The device for secondary continuous refining deslagging of molten aluminum according to claim 1, characterized in that: and a first nitrogen regulating valve is arranged at the left end part of the refining agent nitrogen mixing and adding pipe.

3. The device for secondary continuous refining deslagging of molten aluminum according to claim 1, characterized in that: and a second nitrogen regulating valve is arranged on the first nitrogen inlet pipe.

4. The device for secondary continuous refining deslagging of molten aluminum according to claim 1, characterized in that: and a third nitrogen regulating valve is arranged on the nitrogen main air inlet pipe.

5. The device for secondary continuous refining deslagging of molten aluminum according to claim 1, characterized in that: and a fourth nitrogen regulating valve is arranged on the second nitrogen inlet pipe.

6. The device for secondary continuous refining deslagging of molten aluminum according to claim 1, characterized in that: the refining agent feeding pipe is provided with a refining agent regulating valve.

7. The device for secondary continuous refining deslagging of molten aluminum according to claim 1, characterized in that: the support include the diaphragm, the diaphragm right-hand member inlay the recess of shelving the jar body, the recess bottom surface inlay with refining agent join in tub complex through-hole, the diaphragm left end and riser right flank fixed connection, riser bottom surface and fixing base upper surface fixed connection.

8. The device for secondary continuous refining deslagging of molten aluminum according to claim 1, characterized in that: the top of the tank body is provided with a tank body cover.

9. A use method of a secondary continuous refining deslagging device for molten aluminum is characterized in that: the device for secondary continuous refining and deslagging of the aluminum liquid is connected with gas used for degassing, a proper amount of refining agent and deslagging agent are added into the casting body, the aluminum liquid is introduced during degassing, and meanwhile, the refining agent is injected into the aluminum liquid through pressure, and the refining treatment is carried out while degassing is carried out, so that the purpose of purifying the aluminum liquid is achieved.