CN206109446U - Sediment way protector under converter stove - Google Patents

Abstract

The utility model relates to the technical field of iron and steel production equipment, in particular to a protection device for the lower slag channel of a converter, which comprises two rails arranged parallel to each other, each of which is provided with H-shaped steel on the bottom surface of the rails, and also includes heat-resistant cast iron The heat-resistant cast iron plate is arranged between the two H-shaped steels, and the heat-resistant cast iron plate has an accommodating cavity with an upward opening. The utility model can increase the stability of the operation of the equipment under the furnace and reduce the labor force of the workers. Reduce labor intensity, and increase the service life of vehicles under the furnace and slag track.

Description

Converter furnace lower slag channel protection device

technical field

The utility model relates to the technical field of iron and steel production equipment, in particular to a protection device for a lower slag channel of a converter.

Background technique

The converter smelting operation process and its slag discharge process are mainly composed of the following six steps: 1. Tilt the furnace to add scrap steel, shake the furnace body to a vertical position with molten iron; 2. Lower the lance and start blowing, and add slag material batch by batch; 3. Stop blowing, turn down the furnace, measure temperature, and take samples; 5. Deoxidation and alloying while tapping; 6. Tapping and slag dumping. Sputtering during blowing may cause steel slag to enter the furnace pit. When the converter taps steel, sometimes the slag is poured into the furnace pit with a large mouth.

Fig. 1 is a schematic structural diagram of a conventional slag tunnel device under a furnace. At present, there are mainly the following problems in the slag tunnel under the furnace: 1. The rail pressure plate is only protected by refractory mud, and the loader can easily damage the protective layer when shoveling slag, and the rail pressure plate is often shoveled off, and the rail is tilted or misplaced, or even dropped. , causing vehicles under the furnace to fail to run normally; 2. There is no protection for the rail joints, and it is easy to be shoveled by a loader or excavator with shovel teeth or directly dug out of position or fall, causing serious hidden dangers in production safety, and in serious cases can directly lead to Stop production; 3. Since the pre-embedded steel bars on both sides of the H-shaped steel under the rail are not protected, the exposed H-shaped steel is often buried by red slag and destroyed by loaders and excavators, resulting in the overall dislocation and surface deformation of the H-shaped steel on the rail foundation , which affects the normal operation of ground vehicles; 4. Due to the lack of reliable protection inside the slag tunnel, the slag pit is shoveled deeper and deeper, the time interval for the loader to enter the furnace pit again is longer, and the slag cleaning time is prolonged; The deeper the digging, the deeper the ground will lead to the accumulation of water in the ground, which is prone to explosion when splashing, slag pouring or steel is placed; 5. Due to the splashing and falling of the slag accumulated at the furnace mouth on both sides of the slag channel, manual cleaning is often required, which is labor-intensive. Large, when there is cold steel or it is difficult to clean up, it is necessary to coordinate the pickaxe machine and excavator to clean up first, and then manually clean up, which not only consumes a lot of manpower, financial resources, and material resources; there are also serious safety hazards (personnel must be in the furnace during production) If it is not cleaned up in time, it will often lead to derailment of slag trucks and ladle trucks under the furnace, a long time for hot shutdown of the converter, and reduced equipment operation rate; 6. Frequent damage to the transmission mechanisms and reducers of slag trucks and ladle trucks.

Utility model content

The technical problem to be solved by the utility model is: in order to solve the above problems, a protection device for the lower slag channel of the converter is now provided.

The technical scheme adopted by the utility model to solve the technical problem is: a protective device for the lower slag channel of the converter, which includes two rails arranged parallel to each other, each of which is provided with H-shaped steel on the bottom surface of the rails, and also includes a heat-resistant type A cast iron plate, the heat-resistant cast iron plate is arranged between the two H-shaped steels, and the heat-resistant cast iron plate has an accommodating chamber with an upward opening. Since the heat-resistant cast iron plate has high oxidation resistance at high temperature, solid phase transition will not occur at high temperature, the volume change at high temperature will be reduced, and its thermal stability will be improved. Therefore, when the loader shovels slag, the residue It is the accommodation cavity that falls on the heat-resistant cast iron plate. By setting the heat-resistant cast iron plate between the two H-shaped steels, the rail can be effectively protected to prevent the rail from being dislocated, tilted or directly dropped.

Further, a filling layer is provided between the heat-resistant cast iron plate and the H-shaped steel, and a filling layer is also provided on the lower bottom surface of the heat-resistant cast iron plate. The heat-resistant cast iron plate is protected by the filler, and the coefficient of thermal variation caused by thermal expansion and contraction is alleviated.

Further, the H-shaped steel is equidistantly provided with reinforcing plates along its length direction, and the reinforcing plates are fixedly connected to the H-shaped steel by welding. The overall strength of the H-shaped steel is improved through the reinforcement plate, and at the same time, the rail is stable and reliable during use.

The beneficial effects of the utility model are: when the slag channel protection device of the converter furnace of the utility model is used for shoveling slag by the loader, since the heat-resistant cast iron plate has high anti-oxidation ability at high temperature, no solid phase transition will occur at high temperature , to reduce the volume change at high temperature and improve its thermal stability. Therefore, when the loader shovels the slag, the slag falls into the accommodation cavity of the heat-resistant cast iron plate. By setting the heat-resistant type between the two H-shaped steel The cast iron plate can effectively protect the rails and prevent the problems of dislocation, tilting or direct falling of the rails. The utility model can increase the stability of equipment operation under the furnace, reduce the labor intensity of workers, and improve the safety of vehicles and slag road rails under the furnace. service life.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic diagram of the structure of the original furnace lower slag channel device;

Fig. 2 is the front view of the protection device for the lower slag channel of the converter furnace of the utility model;

Fig. 3 is a top view of the protection device for the lower slag channel of the converter of the present invention.

In the figure: 1. Rail, 2. H-shaped steel, 3. Heat-resistant cast iron plate, 4. Filling layer, 5. Reinforcing plate.

detailed description

Now in conjunction with accompanying drawing, the utility model is described in further detail. These drawings are all simplified schematic diagrams, and only schematically illustrate the basic structure of the utility model, so they only show the configurations related to the utility model.

Example

As shown in Figures 2 and 3, a protection device for the lower slag channel of a converter, including two rails 1 arranged parallel to each other, each of which is provided with H-shaped steel 2 on the bottom surface of the rails 1, and also includes a heat-resistant cast iron plate 3 , the heat-resistant cast iron plate 3 is arranged between the two H-shaped steel plates 2 , and the heat-resistant cast iron plate 3 has an accommodating chamber 301 with an upward opening.

A filling layer 4 is provided between the heat-resistant cast iron plate 3 and the H-shaped steel 2 , and a filling layer 4 is also provided on the lower bottom surface of the heat-resistant cast iron plate 3 .

The H-shaped steel 2 is provided with reinforcing plates 5 at equal intervals along its length direction, and the reinforcing plates 5 are fixedly connected with the H-shaped steel 2 by welding. The overall strength of H-beam 2 is improved.

When the loader is shoveling slag, the above-mentioned slag channel protection device for the lower converter furnace is provided with reinforcing plates 5 at equal intervals along its length direction through the heat-resistant cast iron plate 3 having a housing cavity 301, the filling layer 4, and the H-shaped steel 2, and the slag channel The foundation and rail 1 are reliably protected, solving the problems of deformation of H-shaped steel 2, tilting, dislocation and falling of rail 1, reducing the time for operators to clean slag, and reducing labor intensity; H-shaped steel 2 and heat-resistant cast iron plate 3 are arranged in parallel, and the heat-resistant cast iron plate 3 will not interfere with the normal running of the slag truck, and the residue will fall into the accommodation cavity 301 of the heat-resistant cast iron plate 3. Cleaning up the residue in the chamber 301 of the cast iron plate 3 will not affect the rail 1 and the H-shaped steel 2 next to it, and will protect the vehicles under the furnace. The slag car, ladle car transmission system and the seal of the reducer have a great impact. The oil seal of the reducer skeleton softens after being baked at high temperature, and the seal is damaged and leaks oil; it protects the rail 1 under the furnace and prevents the rail 1 from being scalded by hot slag or large openings. Phenomena that lead to downtime.

The above-mentioned ideal embodiment according to the utility model is an inspiration, and through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the utility model. The technical scope of this utility model is not limited to the content in the description, but must be determined according to the scope of the claims.

Claims (3)

1. a kind of Converter slag road protector, including two rails (1) arranged in parallel, each described rail (1) Bottom surface is provided with H profile steel (2), it is characterised in that：Also include heat resistant type cast iron plate (3), the heat resistant type cast iron plate (3) is arranged Between two H profile steels (2), accommodating chamber (301) of the heat resistant type cast iron plate (3) with opening upwards.

2. Converter slag road protector according to claim 1, it is characterised in that：The heat resistant type cast iron plate (3) Packed layer (4) is provided between the H profile steel (2), the bottom surface of the heat resistant type cast iron plate (3) is also equipped with packed layer (4).

3. the Converter slag road protector according to any one of claim 1-2, it is characterised in that：The H profile steel (2) Along its length spaced set has reinforcing plate (5), and the reinforcing plate (5) is fixed with the H profile steel (2) by welding manner Connection.