Purifying and degassing device of continuous aluminum melting furnace
By setting up a gas diffuser at the bottom of the furnace body of the continuous aluminum melting furnace, injecting inert gas for uniform diffusion, the problems of uneven distribution of nitrogen and short retention time in the prior art are solved, and efficient purification of aluminum liquid and high-cleanness finished products of aluminum castings are achieved.
Patent Information
- Application Number
- CN202411597205.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-03-11
AI Technical Summary
In the prior art, during the purification and degassing process of aluminum liquid, nitrogen distribution is uneven and the retention time is short, resulting in poor purification effect of aluminum liquid and high defect rate of aluminum castings.
A gas diffuser is provided at the bottom of the furnace body of the continuous aluminum melting furnace. An inert gas output device is connected through the intake pipe, and an inert gas is injected, so that it diffuses upward from the bottom of the furnace body, and evenly removes gas and removes impurities in the aluminum liquid.
It realizes effective degassing and impurity removal of aluminum liquid, significantly improving the purity of aluminum liquid and the yield of aluminum castings.
Smart Images
Figure CN119592806A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a purification and degassing device of a continuous aluminum melting furnace, which is provided with a gas diffuser at the bottom of the furnace body of the continuous aluminum melting furnace and can improve the purity of aluminum liquid. Background Art
[0002] Generally, during the smelting process of aluminum in a continuous aluminum melting furnace, aluminum and aluminum waste are added to the aluminum liquid to melt together. When the aluminum is melted, a lot of gases and various non-metallic inclusions and impurities are released. These gases and impurities will directly affect the purity of the aluminum liquid. When it is cooled to make aluminum castings, defective products such as bubbles, slag holes, and inclusions will be generated. The defective rate of aluminum castings is very high and cannot meet the needs of fine processing. In order to overcome the defective rate problem that may occur during aluminum melting, some manufacturers have inserted a nitrogen inlet pipe into the aluminum melting furnace. The end of the nitrogen inlet pipe is provided with a nozzle for nitrogen to be ejected. Nitrogen is injected into the aluminum liquid so that the nitrogen can gradually float upward from the bottom of the aluminum liquid. The gas and impurities in the aluminum liquid adhere to the nitrogen and The gas and impurities in the aluminum liquid are taken out. However, the purification and degassing devices in the prior art all spray nitrogen in one direction, which makes the nitrogen unevenly distributed in the aluminum liquid and stays in the aluminum liquid for too short a time, so the effect of purifying the aluminum liquid is not good. Another method is to use a vertical tubular shaft to rotate the shaft by a motor, and spray nitrogen into the aluminum liquid from the rotating shaft. However, this method of spraying nitrogen by rotating the shaft will generate a vortex in the furnace body during rotation to destroy the surface oxide film, and will roll impurities downward into the aluminum liquid, making the effect of purifying the aluminum liquid poor, and it is impossible to obtain pure aluminum liquid. It is easy to produce defective products such as bubbles, slag holes and impurities in the aluminum castings, so the defective rate of aluminum castings is also quite high. Summary of the invention
[0003] The main purpose of the present invention is to provide a purification and degassing device for a continuous aluminum melting furnace, which can effectively solve the problem that bubbles, slag holes, impurities and the like are generated in the aluminum liquid during aluminum melting in the prior art, resulting in a high defect rate of the produced aluminum castings.
[0004] The present invention provides a purification and degassing device for a continuous aluminum melting furnace, which is mainly provided with a furnace body, wherein the furnace body is provided with a melting zone, a heat preservation zone and a soup extraction zone, wherein a melting heater is provided on the melting zone, and a heat preservation heater is provided on the heat preservation zone; wherein a plurality of gas diffusers are provided at the bottom of the furnace body located in the heat preservation zone, and each of the gas diffusers is provided with an air inlet pipe connected to an inert gas output device.
[0005] The purification and degassing device of the continuous aluminum melting furnace of the present invention has the advantages of being able to truly purify impurities and gases in aluminum liquid, obtaining extremely high-purity aluminum liquid, and being able to cool and produce high-cleanliness aluminum casting products. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 Shown is a schematic diagram of an embodiment of the present invention.
[0007] Figure 2 It is a schematic diagram of aluminum melting and degassing in an embodiment of the present invention.
[0008] Explanation of the accompanying drawings: 1 furnace body; 10 melting zone; 11 insulation zone; 12 soup taking zone; 13 furnace body bottom; 2 melting heater; 3 insulation heater; 4 gas diffuser; 40 air inlet pipe; A slag; B impurities. DETAILED DESCRIPTION
[0009] The technical means used by the present invention to achieve the above-mentioned purpose and effect are listed below with reference to the accompanying drawings, and are described in detail as follows:
[0010] For an embodiment of the present invention, please refer to Figure 1 As shown, the present invention provides a purification and degassing device for a continuous aluminum melting furnace, which is mainly provided with a furnace body 1, wherein the furnace body 1 is provided with a melting zone 10, a heat preservation zone 11 and a soup extraction zone 12, wherein a melting heater 2 is provided on the melting zone 10, and a heat preservation heater 3 is provided on the heat preservation zone 11. A plurality of gas diffusers 4 are provided at the bottom 13 of the furnace body located in the heat preservation zone 11, and each of the gas diffusers 4 is provided with an air inlet pipe 40, and the air inlet pipe 40 is connected to an inert gas output device (not shown in the figure). Thus, the structure of a continuous aluminum melting furnace is obtained.
[0011] See also Figure 2 As shown, the aluminum melting steps of the continuous aluminum melting furnace of the present invention are as follows:
[0012] Step (1): placing an aluminum block into the melting zone 10 of the furnace body 1, and heating the aluminum block by the melting heater 2 on the melting zone 10 to melt the aluminum block into aluminum liquid;
[0013] Step (2): adding a slag remover to the aluminum liquid in the melting zone 10 of the furnace body 1, wherein the slag remover reacts with impurities in the aluminum liquid to form slag A which floats on the surface of the aluminum liquid;
[0014] Step (3): raking away the slag A on the surface of the aluminum liquid in the furnace body 1;
[0015] Step (4): The inert gas conveying device injects an inert gas (such as nitrogen) into the heat preservation zone 11 through the gas diffuser 4 via the gas inlet pipe 40 provided at the bottom 13 of the furnace body. The inert gas diffuses upward from the bottom 13 of the furnace body and sprays into the aluminum liquid for degassing, so that the gas and impurities B remaining in the aluminum liquid adhere to the inert gas, thereby taking out the gas and impurities B remaining in the aluminum liquid and floating them on the aluminum liquid, thereby obtaining pure aluminum liquid;
[0016] Step (5): After being degassed and impurity B removed in the heat preservation zone 11, the pure aluminum liquid is taken out from the liquid taking zone 12 and cooled to produce a high-purity aluminum casting product.
[0017] The present invention injects inert gas through each gas diffuser 4 provided at the bottom 13 of the furnace body of the continuous aluminum melting furnace, and the inert gas diffuses and sprays upward from the bottom 13 of the furnace body. The inert gas can fully and evenly adsorb the gas and impurities B in the aluminum liquid and float them on the surface of the aluminum liquid, which can effectively achieve the degassing and slag removal effect of the aluminum liquid in the continuous aluminum melting furnace, and greatly improve the purity and yield of the finished aluminum castings.
[0018] In summary, the present invention has indeed achieved the intended purpose and efficacy, and is more ideal and practical than the prior art. The above-described embodiments are only specific descriptions of the preferred embodiments of the present invention, and the embodiments are not intended to limit the scope of the claims of the present invention. All other equivalent changes and modifications that are accomplished without departing from the technical means disclosed by the present invention should be included in the scope of the claims covered by the present invention.
Claims
1. A purification and degassing device for a continuous aluminum melting furnace, mainly comprising a furnace body, the furnace body comprising a melting zone, a heat preservation zone and a soup taking zone, the melting zone being provided with a melting heater, the heat preservation zone being provided with a heat preservation heater; Features: A plurality of gas diffusers are arranged at the bottom of the furnace body in the heat preservation zone, and each of the gas diffusers is provided with an air inlet pipe connected to an inert gas output device.