WO2021008396A1

WO2021008396A1 - Linkage heat-insulation mechanism for in-furnace refining apparatus

Info

Publication number: WO2021008396A1
Application number: PCT/CN2020/100334
Authority: WO
Inventors: 诸葛敏; 黎星界; 蓝鸿亮
Original assignee: 派罗特克（广西南宁）高温材料有限公司
Priority date: 2019-07-18
Filing date: 2020-07-06
Publication date: 2021-01-21
Also published as: CN110453099B; CN110453099A

Abstract

A linkage heat-insulation mechanism for an in-furnace refining apparatus. The linkage heat-insulation mechanism comprises a frame (2). A middle portion of the frame (2) is rotatably connected to a stirring mechanism (3) of the in-furnace refining apparatus. A slide rod (5) is installed on the top of the frame (2), and a heat insulation curtain (1) is disposed on the slide rod (5). An upper end of the heat insulation curtain (1) is fixedly connected to the stirring mechanism (3), and a lower end of the heat insulation curtain (1) is fixedly connected to a counterweight (4). The stirring mechanism (3), when rotating, drives the heat insulation curtain (1) and the counterweight (4) to raise or lower in a synchronous manner, such that the heat insulation curtain (1) insulates the in-furnace refining apparatus from a high-temperature airflow (9) flowing from a furnace (7) via a furnace mouth (8). The linkage heat-insulation mechanism can protect the in-furnace refining apparatus from damage caused by unfavorable factors such as high temperature and corrosion, and can prolong the service life of the apparatus.

Description

Linkage heat insulation mechanism for refining equipment in furnace

Technical field

The invention belongs to the technical field of molten aluminum treatment equipment, in particular to a linkage heat insulation mechanism for refining equipment in a furnace.

Background technique

In the aluminum processing and aluminum casting industries, in order to produce high-quality aluminum alloy products, it is usually necessary to reduce the content of hydrogen, alkali metals and non-metallic inclusions in the molten aluminum in the furnace. The most advanced and efficient equipment currently used to realize this process is the furnace refining equipment.

When the furnace is equipped with in-furnace refining equipment, it is usually necessary to add furnace mouth and furnace door on the furnace side wall. The basic working process of the furnace refining equipment is as follows: open the furnace door, the stirring mechanism of the furnace refining equipment extends through the furnace mouth into the molten aluminum in the furnace for degassing and refining; after the degassing and refining work, the stirring mechanism is retracted , Close the furnace door. In practical applications, it is found that during the process of opening the furnace door, closing the furnace door, and degassing refining, there is a high-temperature airflow in the furnace flowing through the furnace mouth to the furnace refining equipment, and the high-temperature airflow contains high-temperature gas and corrosive dust. Unfavorable factors such as high temperature and corrosion caused by high-temperature air flow will cause damage to the parts of the refining equipment in the furnace and greatly shorten the service life.

Therefore, it is necessary to improve the existing structure and add a simple and reliable heat insulation mechanism to avoid direct contact of high-temperature airflow with the refining equipment in the furnace, and to improve the service life and reliability of the equipment.

Summary of the invention

The technical problem to be solved by the present invention is to provide a linkage heat insulation mechanism for the refining equipment in the furnace, through which the high temperature air flow is isolated from the refining equipment in the furnace, and the equipment is protected from unfavorable factors such as high temperature and corrosion. Damage, extend the service life of the equipment.

The present invention solves the above technical problems with the following technical solutions:

The invention relates to a linkage heat insulation mechanism for refining equipment in a furnace, which includes a frame. The middle part of the frame is hinged with the stirring mechanism of the refining equipment in the furnace. A sliding rod is installed on the top of the frame, and the heat insulation curtain is placed to slide. On the rod, the upper end of the heat insulation curtain is fixedly connected with the stirring mechanism, and the lower end of the heat insulation curtain is fixedly connected with the counterweight. When the stirring mechanism rotates, the heat insulation curtain and the counterweight are driven to rise or fall synchronously, so that the heat insulation curtain will be removed from the furnace The high-temperature air flowing out through the furnace mouth is isolated from the refining equipment in the furnace.

The sliding rod of the present invention is a cylindrical structure with a smooth surface, which can freely rotate relative to its center or be completely fixed on the frame.

The heat insulation curtain of the present invention is sewn by one or more layers of soft high temperature resistant and corrosion resistant materials.

The preferred material of the heat insulation curtain of the present invention is ceramic fiber cloth, high silica cloth, alkali-free expanded cloth or stainless steel wire mesh.

The structures of the upper end and the lower end of the thermal insulation curtain of the present invention are both ring-shaped or planar.

When the upper end of the heat insulation curtain adopts a ring-shaped structure, the round rod is passed through the ring-shaped structure at the upper end, and the round rod is fixed on the stirring mechanism by a U-shaped bolt.

When the upper end of the heat insulation curtain adopts a planar structure, a planar structure with a pressing plate close to the upper end is adopted, and it is installed on the stirring mechanism through bolts.

When the lower end of the heat-insulating curtain adopts a ring structure, the counterweight is passed through the ring-shaped structure at the lower end of the heat-insulating curtain to be hung on the lower end of the heat-insulating curtain.

When the lower end of the heat insulation curtain adopts a planar structure, the counterweight is closely attached to the planar structure of the lower end, and the counterweight is fixedly connected with the lower end of the heat insulation curtain through bolts, so that it is hung on the lower end of the heat insulation curtain.

The length dimension of the heat insulation curtain is 1000-6000 mm, the width dimension is 500-3000 mm, and the thickness is 1-30 mm.

The invention cleverly utilizes the rotation movement of the stirring mechanism to switch the working position, and the relative displacement difference with the frame is formed between the furnace mouth and the refining equipment in the furnace by adding a set of linkage heat insulation mechanism that does not require additional driving A barrier isolates the high-temperature airflow from the refining equipment in the furnace to protect the equipment from damage due to high temperature and corrosion and prolong the service life of the equipment.

Description of the drawings

Fig. 1 is a schematic diagram of the interlocking heat insulation mechanism used in the furnace refining equipment of the present invention in the standby position.

Fig. 2 is a schematic diagram of the linkage heat insulation mechanism used in the furnace refining equipment of the present invention in the working position.

Fig. 3 is a schematic diagram of the heat-insulating curtain at part A in Fig. 1 when matched with a sliding rod.

Fig. 4 is a schematic structural diagram of the first shape of the upper or lower end of the heat insulation curtain.

Fig. 5 is a schematic structural view of the second shape of the upper or lower end of the heat insulation curtain.

Fig. 6 is a schematic diagram showing the upper end of the thermal insulation curtain at part B in Fig. 1 and Fig. 2 being fixed with a ring structure.

Fig. 7 is a schematic diagram showing that the upper end of the heat insulation curtain at part B in Fig. 1 and Fig. 2 is fixed in a planar structure.

Fig. 8 is a schematic diagram of the lower end of the thermal insulation curtain at the position C in Fig. 1 and Fig. 2 being fixed with a ring structure.

Fig. 9 is a schematic diagram showing the lower end of the heat insulation curtain at the position C in Fig. 1 and Fig. 2 being fixed in a planar structure.

Explanation of marks in the figure: 1- heat insulation curtain, 2- frame, 3- stirring mechanism, 4- counterweight, 5- sliding rod, 6-hinge pivot, 7- furnace, 8- furnace mouth, 9- high-temperature air flow, 10-center, 11-round rod, 12-U bolt, 13-press plate, 14-bolt, 15- deflector, 16-bolt, 17-furnace door, 18-melted aluminum, 19-heat insulation baffle .

Detailed ways

The technical scheme of the present invention will be described as follows in conjunction with the drawings:

As shown in Figures 1 and 2, the linkage heat insulation mechanism of the present invention for refining equipment in the furnace is mainly composed of heat insulation curtain 1, frame 2, mixing mechanism 3, counterweight 4, and sliding rod 5. The refining equipment in the furnace is installed on the frame 2. The stirring mechanism 3 of the refining equipment in the furnace is hinged with the middle of the frame 2. The stirring mechanism 3 can rotate around the hinge fulcrum 6, and a sliding rod 5 is installed on the top of the frame 2. , The heat insulation curtain 1 is placed on the sliding rod 5 and can slide on the sliding rod 5; the upper end of the heat insulation curtain 1 is fixedly connected with the stirring mechanism 3, and the lower end of the heat insulation curtain 1 is fixedly connected with the counterweight 4 and hung on The lower end of the thermal insulation curtain 1. When the stirring mechanism 3 rotates with the hinge fulcrum 6 as the center, the heat insulation curtain 1 and the counterweight 4 can be driven to rise or fall synchronously, so that the heat insulation curtain 1 acts as a barrier to the high temperature flowing out of the furnace 7 through the furnace mouth 8. The air flow 9 is isolated from the furnace refining equipment on the frame 2.

In the above-mentioned invention, as shown in FIG. 3, the sliding rod 5 used in the present invention is a cylindrical structure with a smooth surface, which can freely rotate relative to its center 10 or be completely fixed on the frame 2.

In the above-mentioned invention, as shown in Figures 4 and 5, the thermal insulation curtain 1 is woven and sewn by one or more layers of soft high-temperature-resistant and corrosion-resistant fabric. The preferred material for the high-temperature and corrosion-resistant fabric is ceramic fiber. Cloth, high silica cloth, alkali-free expanded cloth, stainless steel wire mesh, etc.

In the above-mentioned invention, the structures of the upper and lower ends of the thermal insulation curtain 1 are both ring-shaped (as shown in FIG. 4) or flat (as shown in FIG. 5).

In the above invention, as shown in FIG. 6, when the upper end of the heat insulation curtain 1 adopts a ring structure, the rod 11 is inserted through the ring structure at the upper end of the heat insulation curtain 1, and the rod 11 is connected by a U-shaped bolt 12. Fixed on the stirring mechanism 3.

In the above invention, as shown in FIG. 7, when the upper end of the heat insulation curtain 1 adopts a planar structure, a planar structure in which the pressing plate 13 is close to the upper end is adopted, and the heat insulation curtain 1 is fixed to the stirring mechanism 3 by bolts 14. .

In the above invention, as shown in FIG. 8, when the lower end of the heat insulation curtain 1 adopts a ring structure, the counterweight 4 is passed through the ring structure at the lower end thereof to be hung on the lower end of the heat insulation curtain 1;

In the above invention, as shown in FIG. 9, when the lower end of the heat insulation curtain 1 adopts a planar structure, the counterweight 4 is closely attached to the planar structure of its lower end, and the counterweight 4 is connected to the lower end of the heat insulation curtain 1 by bolts 16. A fixed connection is formed so that it is hung on the lower end of the heat insulation curtain 1.

In the above-mentioned invention, the preferred length dimension of the thermal insulation curtain 1 is 1000-6000 mm, the preferred width dimension is 500-3000 mm, the number of layers is preferably 1 to 5, and the thickness is preferably 1 to 30 mm.

As shown in Figure 1 and Figure 2, the basic work flow of the furnace refining equipment is as follows: Before preparing for degassing and refining, the furnace door 17 is lifted and opened, and the stirring mechanism 3 extends from the furnace mouth 8 into the molten aluminum 18, and while stirring The molten aluminum 18 is sprayed with inert gas, chlorine or refining agent, so that the inert gas, chlorine or refining agent is evenly distributed in the molten aluminum 18, through a series of physical and chemical reactions to reduce hydrogen, alkali metals and non-metals. For the purpose of inclusion content, after degassing and refining, the stirring mechanism 3 is retracted, and the furnace door 17 is lowered and closed.

In practical applications, it is found that when the equipment is in the standby position or working position, even if the furnace door 17 or the heat insulation baffle 19 covers the furnace mouth, a small amount of high-temperature air flow 9 seeps from the furnace mouth 8; when the furnace door 17 is opened , The stirring mechanism 3 reaches the working position, the stirring mechanism 3 returns to the standby position, and the furnace door 17 is closed. The furnace door 17 is in a fully or partially opened state. During these 5 to 10 minutes, a large amount of high temperature air flow 9 will be removed from The furnace port 8 flows out. The above-mentioned high-temperature air flow 9 seeping or flowing out from the furnace mouth 8 all flows to the refining equipment in the furnace, and the life of the refining equipment in the furnace that is in long-term contact with the high-temperature air flow 9 will be greatly shortened, and in severe cases, it will fail or be damaged in a short time.

Therefore, in order to protect the refining equipment in the furnace, the linkage heat insulation mechanism of the present invention for the refining equipment in the furnace is adopted, and its working principle is as follows:

Since the stirring mechanism 3 and the counterweight 4 of the present invention stretch both ends of the thermal insulation curtain 1, and the sliding rod 5 supports the middle of the thermal insulation curtain 1, the thermal insulation curtain 1 of the present invention can form an "L"-shaped structure. surface.

As shown in Figure 2, when the furnace refining equipment is switched from the standby position to the working position, that is, when the stirring mechanism 3 rotates clockwise with the hinge fulcrum 6 as the center, the length of the upper half of the "L"-shaped structure of the heat insulation curtain 1 changes At the same time, the length of the lower half of the “L”-shaped structure of the heat insulation curtain 1 becomes smaller, that is, the position of the counterweight 4 is synchronized with the clockwise rotation of the stirring mechanism 3, and it also allows the stirring mechanism 3 to extend into the furnace 7. Out of space. Since the heat insulation curtain 1 and the deflector 15 form a barrier, most of the high-temperature airflow 9 can be isolated from the refining equipment in the furnace.

As shown in Figure 1, when the working position of the furnace refining equipment is switched to the standby position, that is, when the stirring mechanism 3 rotates counterclockwise with the hinge fulcrum 6 as the center, the length of the upper half of the "L" shaped structure of the heat insulation curtain 1 changes At the same time, the length of the lower half of the "L"-shaped structure of the heat insulation curtain 1 becomes larger, that is, the position of the counterweight 4 decreases synchronously with the counterclockwise rotation of the stirring mechanism 3, and it is also between the furnace mouth 8 and the furnace refining equipment A complete barrier is formed between them to prevent the isolation of high-temperature air flow 9 from flowing into the refining equipment in the furnace.

The invention cleverly utilizes the relative displacement difference between the stirring mechanism 3 and the frame 2 when the position is switched, and by adding a set of linkage heat insulation mechanism that does not require additional driving, a barrier is formed between the furnace mouth 8 and the refining equipment in the furnace. Isolate the high-temperature air stream 9 from the refining equipment in the furnace to protect the equipment from damage due to high temperature and corrosion and other unfavorable factors, and extend the service life of the equipment.

Claims

A linkage heat insulation mechanism for refining equipment in a furnace, comprising a frame, the middle of the frame is hinged with the stirring mechanism of the refining equipment in the furnace, and is characterized in that a sliding rod is installed on the top of the frame, and the heat insulation curtain is arranged On the sliding rod, the upper end of the heat insulation curtain is fixedly connected with the stirring mechanism, and the lower end of the heat insulation curtain is fixedly connected with the counterweight. When the stirring mechanism rotates, the heat insulation curtain and the counterweight are driven to rise or fall synchronously, so that the heat insulation curtain will The high-temperature air flowing from the furnace through the furnace mouth is isolated from the refining equipment in the furnace.
The linkage heat insulation mechanism for refining equipment in the furnace according to claim 1, wherein the sliding rod is a cylindrical structure with a smooth surface, and can be freely rotated relative to its center or completely fixed on the frame.
The linkage heat insulation mechanism for refining equipment in the furnace according to claim 1 or 2, wherein the heat insulation curtain is sewn by one or more layers of soft high temperature resistant and corrosion resistant materials.
The linkage heat insulation mechanism for furnace refining equipment according to claim 3, wherein the heat insulation curtain material is ceramic fiber cloth, high silica cloth, alkali-free expanded cloth or stainless steel wire mesh.
The linkage heat insulation mechanism for furnace refining equipment according to claim 1 or 2, characterized in that the upper and lower ends of the heat insulation curtain are both ring-shaped or flat-shaped.
The linkage heat insulation mechanism for furnace refining equipment according to claim 5, characterized in that, when the upper end of the heat insulation curtain adopts a ring structure, the round rod is passed through the ring structure at the upper end and passed through the U-shaped bolt Fix the round rod on the mixing mechanism; when the upper end of the heat insulation curtain adopts a flat structure, the flat structure with the pressure plate close to the upper end is adopted, and it is installed on the mixing mechanism through bolts.
The linkage heat insulation mechanism for furnace refining equipment according to claim 5, characterized in that, when the lower end of the heat insulation curtain adopts a planar structure, the counterweight is closely attached to the planar structure of the lower end, and the counterweight A fixed connection is formed with the lower end of the heat insulation curtain so that it is hung on the lower end of the heat insulation curtain.
The linked heat insulation mechanism for furnace refining equipment according to claim 1, wherein the length of the heat insulation curtain is 1000-6000 mm, the width dimension is 500-3000 mm, and the thickness is 1-30 mm.