Aluminum melt purification equipment

Abstract

The utility model belongs to the technical field of alloy melt treatment, and discloses aluminum melt purification equipment which comprises a stirring box, a launder and a purification chamber, a feeding opening is formed in one side of the stirring box, the stirring box, the launder and the purification chamber are sequentially communicated, a gas conveying pipeline is arranged at the top in the launder, a plurality of gas outlet pipelines are vertically arranged on the gas conveying pipeline at equal intervals, and gas spraying balls are installed at the bottom ends of the gas outlet pipelines; a plurality of gas storage tanks are mounted above the launder, and each gas storage tank is communicated with the gas conveying pipeline through a connecting pipe; an aluminum outlet is formed in one side of the purification chamber, and a filter plate is installed in the purification chamber. An air pump is mounted in a connecting pipeline of each air storage tank and the air conveying pipeline; a plurality of through holes are formed in each air injection ball; a row of liquid outlet is formed in one side of the bottom of the stirring box; and a filter screen is also arranged at the joint of the liquid outlet and the stirring box. According to the technical scheme, the filtering and purifying rate is improved, and the refining and purifying time is effectively shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of alloy melt processing, in particular to aluminum melt purification equipment. Background Art

[0002] Aluminum alloy castings have extremely wide applications, and the comprehensive performance requirements for aluminum alloy castings in important application fields such as national defense are becoming increasingly higher. However, during the smelting process of aluminum alloys, hydrogen and oxide inclusions are very easy to be produced. Porosity and oxide inclusions directly or indirectly affect the organizational properties of aluminum alloy castings, and are the main reasons for stress concentration or crack sources in the use of aluminum alloy castings, which brings great harm to the reliability of aluminum alloy castings. The quality of aluminum alloy melt has an important influence on the organization and performance of aluminum alloy castings. The purification treatment of aluminum alloy is an important link in improving the quality of aluminum alloy castings.

[0003] Aluminum alloy melt refers to the alloy formed by aluminum and other metal elements (such as magnesium, copper, zinc, etc.) in a molten state. The purification of aluminum alloy melt is the key technology to ensure its metallurgical quality, and reducing the hydrogen content in the melt is the main purpose of aluminum melt purification. During the smelting process, aluminum alloy is very sensitive to hydrogen or water vapor and will inevitably absorb a certain degree of hydrogen. If the melt is cast (mold casting or continuous casting) without treatment, defects such as pores and looseness will occur, and may cause thermal cracking of ingots or castings, thereby increasing the scrap rate. Therefore, on the one hand, during the smelting process, the introduction of hydrogen is minimized; on the other hand, the melt is degassed and purified before casting. Degassing treatment usually also has the function of removing inclusions such as oxides, and degassing treatment is sometimes referred to as purification treatment or refining treatment.

[0004] According to the working mode, the degassing method can be divided into two types: online and intermittent. The online continuous degassing method has good degassing effect, can stably guarantee the quality of aluminum alloy liquid and has little environmental pollution. It is widely used in large aluminum processing enterprises. The intermittent method has relatively simple equipment and is easy to operate. It is generally used in small and medium-sized aluminum alloy foundries. According to the degassing mechanism, it can be divided into two categories: adsorption and non-adsorption degassing: adsorption degassing refers to the direct contact between aluminum alloy liquid and adsorbent (such as various gases, liquids, solid refining agents and filter media, etc.), so that the adsorbent and the gas in the aluminum alloy liquid have physical, chemical, physical or mechanical effects to achieve the purpose of degassing. The adsorption purification methods include flux method, rotary degassing method, etc.; non-adsorption degassing refers to a method that does not rely on adding adsorbent to the melt, but changes the equilibrium state of the metal gas system through some physical action (such as vacuum, ultrasound, etc.), so that the gas and inclusions are separated from the aluminum alloy liquid. The non-adsorption purification methods include vacuum treatment, ultrasonic treatment, etc. At present, the purification equipment for aluminum alloy melt uses nitrogen and an outlet pipe to penetrate into the aluminum liquid for purification, which is not uniform enough and the degree of filtering and purifying inclusions is not enough. Utility Model Content

[0005] The utility model aims to provide an aluminum melt purification device to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above purpose, the utility model provides an aluminum melt purification device, comprising:

[0007] Mixing tanks, launders and purge chambers;

[0008] A feed port is provided on one side of the mixing box, and the mixing box, the flow trough and the purification chamber are connected in sequence. A gas pipeline is provided on the top of the flow trough, and a plurality of gas outlet pipelines are vertically arranged at equal distances on the gas pipeline, and a jet ball is installed at the bottom end of each gas outlet pipeline; a plurality of gas storage tanks are installed above the flow trough, and each of the gas storage tanks is connected to the gas pipeline through a connecting pipe; an aluminum outlet is provided on one side of the purification chamber, and a filter plate is installed in the purification chamber.

[0009] Optionally, a heating device is also included, and the heating device is installed at the bottom of the mixing box.

[0010] Optionally, an air pump is installed in the connecting pipeline between each gas storage tank and the gas pipeline.

[0011] Optionally, each of the air-jet balls is provided with a plurality of through holes.

[0012] Optionally, a liquid discharge port is provided on one side of the bottom of the mixing box, and the mixing box is connected to the flow channel through the liquid discharge port.

[0013] Optionally, a filter screen is further provided at the connection between the liquid outlet and the stirring box.

[0014] Optionally, the stirring box includes a stirring box body, a stirring shaft, stirring blades and a motor;

[0015] The stirring shaft is installed inside the stirring box, the stirring blades are installed on the outer side wall of the stirring shaft, the motor is installed above the stirring box, and the motor is electrically connected to the stirring shaft.

[0016] Optionally, the filter plate is a ceramic filter plate.

[0017] The technical effects of the utility model are:

[0018] The utility model provides an aluminum melt purification device, which inputs aluminum melt into the stirring box from a feed port, turns on a motor and a heating device, performs stirring and heating, and after stirring, the aluminum liquid enters a flow channel through a liquid outlet, turns on a gas storage tank and an air pump, performs jet purification, and through a through hole opened on an air jet ball, the bubble size is significantly reduced, and under the condition of the same inert gas flow rate, the contact area is significantly increased, and the diffusion area is also significantly increased accordingly, thereby improving the degassing purification efficiency; since the inert gas bubble size is small, its movement speed in the melt is significantly reduced, and thus its residence time in the melt is significantly increased, thereby improving the degassing purification efficiency, and after purification is completed, it flows into a purification chamber, flows out after adsorption filtration by a ceramic filter plate, and completes purification.

[0019] The utility model provides an aluminum melt purification device which can perform multi-stage purification. A jet ball is installed at the bottom end of each of the gas outlet pipes, and a through hole is provided on the jet ball to ensure that in the aluminum alloy smelting and purification process, the contact area between the inert gas jet and the aluminum alloy melt is increased as much as possible, and the device has layers, so that bubbles formed when the gas is jetted are dispersed in the aluminum alloy melt, and the small bubbles absorb impurities and hydrogen in the melt during the floating process, and bring these impurities and hydrogen to the surface of the melt, so that the melt is effectively purified; a ceramic filter plate is further used to filter inclusions; the filtering and purification rate is improved through the multi-stage purification scheme; the device works stably and reliably, has good practical value, effectively reduces the refining and purification time, improves the production efficiency, and thus improves the comprehensive performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the aluminum melt purification equipment in the embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the jet ball in the embodiment of the utility model;

[0024] Explanation of the numbers: 1. Mixing box; 2. Purification chamber; 3. Feed inlet; 4. Mixing shaft; 5. Mixing blades; 6. Heater; 7. Motor; 8. Gas storage tank; 9. Air pump; 10. Air outlet pipe; 11. Jet ball; 12. Filter plate; 13. Aluminum outlet. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element in the middle; when an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element in the middle at the same time; the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only;

[0028] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] Embodiment 1

[0032] like Figure 1-Figure 2 As shown, this embodiment provides an aluminum melt purification device, including:

[0033] Mixing box, launder and purification chamber 2;

[0034] A feed port 3 is provided on one side of the mixing box, and the mixing box, the flow channel and the purification chamber 2 are connected in sequence. A gas pipeline is provided on the top of the flow channel, and a plurality of gas outlet pipelines are vertically arranged at equal distances on the gas pipeline, and a jet ball 11 is installed at the bottom end of each gas outlet pipeline; a plurality of gas storage tanks 8 are installed above the flow channel, and each gas storage tank 8 is connected to the gas pipeline through a connecting pipe; an aluminum outlet 13 is provided on one side of the purification chamber 2, and a filter plate 12 is installed in the purification chamber 2.

[0035] The aluminum melt purification equipment provided in this embodiment can perform multi-stage purification. A jet ball is installed at the bottom end of each of the outlet pipes, and a through hole is opened on the jet ball to ensure that during the aluminum alloy smelting and purification process, the contact area between the inert gas injection and the aluminum alloy melt is increased as much as possible, and has a layered structure, so that the bubbles formed when the gas is injected are dispersed in the aluminum alloy melt, and the small bubbles absorb impurities and hydrogen in the melt during the floating process, and bring these impurities and hydrogen to the surface of the melt, so that the melt is effectively purified; a ceramic filter plate is further used to filter inclusions; the filtration purification rate is improved through a multi-stage purification scheme; the device works stably and reliably, has good practical value, effectively reduces the refining and purification time, improves production efficiency, and thus improves the comprehensive performance of the product.

[0036] It is feasible to further include a heating device, which is installed at the bottom of the mixing box.

[0037] It is feasible that an air pump 9 is installed in the connecting pipeline between each of the air storage tanks 8 and the air pipeline.

[0038] It is feasible that each of the gas-jet balls 11 is provided with a plurality of through holes; the through holes are provided on the gas-jet balls to significantly reduce the size of the bubbles, and under the condition of the same inert gas flow rate, the contact area thereof is significantly increased, and the diffusion area is also significantly increased accordingly, thereby improving the degassing and purification efficiency; since the size of the inert gas bubbles is small, the movement speed thereof in the melt is significantly reduced, and thus the residence time thereof in the melt is significantly increased, thereby improving the degassing and purification efficiency;

[0039] It can be implemented that a liquid discharge port is provided at one side of the bottom of the mixing box, and the mixing box is connected to the flow channel through the liquid discharge port.

[0040] It can be implemented that a filter screen is also provided at the connection between the liquid outlet and the mixing box, and the working efficiency is greatly improved by providing the filter screen;

[0041] It can be implemented that the stirring box includes a stirring box body 1, a stirring shaft 4, a stirring blade 5 and a motor 7;

[0042] The stirring shaft 4 is installed inside the stirring box 1 , the stirring blade 5 is installed on the outer side wall of the stirring shaft 4 , the motor 7 is installed above the stirring box 1 , and the motor 7 is electrically connected to the stirring shaft 4 .

[0043] It is feasible that the filter plate 12 is a ceramic filter plate, which can filter inclusions and improve the filtration purification rate in combination with the previous level of purification;

[0044] The specific implementation process of this embodiment is as follows:

[0045] The aluminum melt is fed into the stirring box from the feed port, and the motor and the heating device are turned on for stirring and heating. After stirring, the aluminum liquid enters the flow channel through the liquid outlet, and the gas storage tank and the air pump are turned on for jet purification. The bubble size is significantly reduced through the through hole opened on the jet ball. Under the condition of the same inert gas flow rate, the contact area is significantly increased, and the diffusion area is also significantly increased accordingly, thereby improving the degassing and purification efficiency; since the inert gas bubble size is small, its movement speed in the melt is significantly reduced, so that its residence time in the melt is significantly increased, thereby improving the degassing and purification efficiency. After purification is completed, it flows into the purification chamber, flows out after adsorption and filtration by the ceramic filter plate, and completes purification.

[0046] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An aluminum melt purification device, characterized in that: include: Mixing box, launder and purification chamber (2); A feed port (3) is provided on one side of the mixing box; the mixing box, the flow channel and the purification chamber (2) are connected in sequence; a gas pipeline is provided on the top of the flow channel; a plurality of gas outlet pipelines are vertically provided on the gas pipeline at equal distances; a jet ball (11) is installed at the bottom end of each gas outlet pipeline; a plurality of gas storage tanks (8) are installed above the flow channel; each gas storage tank (8) is connected to the gas pipeline via a connecting pipe; an aluminum outlet (13) is provided on one side of the purification chamber (2), and a filter plate (12) is installed in the purification chamber (2).

2. The aluminum melt purification equipment according to claim 1, characterized in that: It also includes a heating device, which is installed at the bottom of the mixing box.

3. The aluminum melt purification equipment according to claim 1, characterized in that: An air pump (9) is installed in the connecting pipeline between each of the air storage tanks (8) and the air transmission pipeline.

4. The aluminum melt purification equipment according to claim 1, characterized in that: Each of the air-jet balls (11) is provided with a plurality of through holes.

5. The aluminum melt purification equipment according to claim 1, characterized in that: A liquid discharge port is provided at one side of the bottom of the mixing box, and the mixing box is connected to the flow channel through the liquid discharge port.

6. The aluminum melt purification equipment according to claim 5, characterized in that: A filter screen is also provided at the connection between the liquid outlet and the stirring box.

7. The aluminum melt purification equipment according to claim 1, characterized in that: The stirring box comprises a stirring box body (1), a stirring shaft (4), stirring blades (5) and a motor (7); The stirring shaft (4) is installed inside the stirring box (1), the stirring blade (5) is installed on the outer wall of the stirring shaft (4), the motor (7) is installed above the stirring box (1), and the motor (7) is electrically connected to the stirring shaft (4).

8. The aluminum melt purification equipment according to claim 1, characterized in that: The filter plate (12) is a ceramic filter plate.

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