CN210104001U

CN210104001U - Novel structure of RH stove circulating pipe

Info

Publication number: CN210104001U
Application number: CN201920757281.3U
Authority: CN
Inventors: 李斌; 崔庆阳; 高耸; 赵保群; 焦智宇; 张春杰
Original assignee: Luoyang Lier Refractory Materials Co Ltd
Current assignee: Luoyang Lier Functional Materials Co.,Ltd.
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2020-02-21
Anticipated expiration: 2029-05-24

Abstract

The utility model discloses a novel structure of RH stove circulating tube, include ring brick and circulating tube lower ring brick on the circulating tube around furnace body inner wall, ring brick is built by laying bricks or stones and is set up ring brick upper portion position under the circulating tube on the circulating tube, novel ring brick is built by laying bricks or stones at the top of ring brick on the circulating tube, the upper surface of novel ring brick is in on the same horizontal plane with the upper surface of stove bottom brick, increase through ring brick upper surface at traditional circulating tube and build by laying bricks or stones novel ring brick, make ring brick and real empty room stove bottom level, eliminate because the stove bottom sinks, the deformation leads to unfavorable condition such as molten steel stockpile, the wholeness ability of stove bottom refractory material has been strengthened, thereby the performance of circulating tube brick has been improved, the life of RH stove circulating tube has been prolonged, the change cycle of circulating tube brick has been increased, the operational benefits of RH stove equipment has been improved greatly.

Description

Novel structure of RH stove circulating pipe

Technical Field

The utility model belongs to the technical field of RH refining furnace structural design, concretely relates to novel structure of RH stove circulating tube.

Background

The RH furnace circulating pipe is an important part of the RH refining furnace and is a circulating channel of molten steel. The throat pipe positioned at the lower part of the RH refining furnace vacuum chamber is the connecting part of the dip pipe and the lower groove. The service life of the lower tank lining determines the service life of the whole equipment of the RH furnace, and the service life of the circulating pipe determines the service life of the lower tank lining.

The RH furnace is continuously subjected to the intermittent large temperature difference of high-temperature molten steel in the using process, the steel shell at the bottom of the furnace is seriously sunk and deformed, and the deformation is often over 100 mm. After the steel shell deforms, the circulating pipe sinks and shifts, molten steel is accumulated in the using process, the problems of serious corrosion of the circulating pipe, even steel penetration and steel leakage often occur, and the whole service life of the RH furnace is directly influenced. As shown in fig. 3-4, the RH furnace circulating pipe is a combined structure of an upper ring brick and a lower ring brick, the upper ring brick 2 of the circulating pipe is in direct contact with molten steel and is mainly seriously abraded and eroded by scouring, and the lower ring brick 3 of the circulating pipe is in direct contact with the upper ring brick 6 of the dip pipe and is seriously damaged by thermal shock; in addition, because the steel shell at the bottom of the furnace sinks and deforms, the ramming material 5 needs to be filled on the surface of the ring brick 2 on the circulating pipe and is rammed tightly by a vibrating rod, and the ramming material 5 is easily eroded by high-temperature molten steel in the using process, so that the storage volume of the molten steel is generated, and the service life of the RH furnace is shortened.

Disclosure of Invention

The utility model discloses a solve above-mentioned technical problem, provide a novel structure of RH stove circulating tube, through increase the novel ring brick of building on the brick upper surface of a contraceptive ring at traditional circulating tube, make novel ring brick and real empty room stove bottom level, eliminate because the stove bottom sinks, warp and lead to unfavorable condition such as molten steel deposits, strengthened the wholeness ability of stove bottom refractory material to circulating tube brick's performance has been improved.

The utility model adopts the technical proposal that: the utility model provides a novel structure of RH stove circulating pipe, includes ring brick and circulating pipe lower ring brick on the circulating pipe around furnace body inner wall, and the ring brick is built by laying bricks or stones and is set up ring brick upper portion position under the circulating pipe on the circulating pipe, and the top of ring brick is built by laying bricks or stones on the circulating pipe has novel ring brick, and the upper surface of novel ring brick and the upper surface of stove bottom brick are in on same horizontal plane.

And an upper impregnated tube ring brick is arranged below the lower circulating tube ring brick, and the upper impregnated tube ring brick and the lower circulating tube ring brick are arranged concentrically.

Before the molten steel is treated, the dipping pipe is dipped into the molten steel of a ladle to be treated, when a vacuum groove of an RH furnace is vacuumized, the atmospheric pressure on the surface of the molten steel forces the molten steel to flow into the vacuum groove from the dipping pipe, two dipping pipes which are communicated with the vacuum groove are arranged, one dipping pipe is an ascending pipe, the other dipping pipe is a descending pipe, and because the ascending pipe continuously blows argon into the molten steel, a higher static pressure difference is generated relative to the descending pipe without blowing argon, so that the molten steel enters from the ascending pipe and flows to the descending pipe through the lower part of the vacuum groove, and the process is continuously circulated and repeated. In a vacuum state, argon, hydrogen, carbon monoxide and other gases flowing through the vacuum channel steel water are pumped away in the circulation process of the steel liquid, meanwhile, the molten steel entering the vacuum tank is subjected to metallurgical reaction, and the molten steel is purified through the circulation degassing refining. In the process, the newly added ring bricks are used for replacing the traditional ramming material structure, and the upper surfaces of the newly added ring bricks are horizontal to the bottom of the vacuum chamber, so that the phenomenon of molten steel accumulation caused by sinking and deformation of the bottom of the vacuum chamber is eliminated, the overall performance of the bottom refractory is enhanced, the service performance of the circulating tube bricks is improved, the service life of the circulating tube of the RH furnace is prolonged, and the operating efficiency of RH furnace equipment is greatly improved.

The novel ring bricks are built on the tops of the ring bricks on the circulating pipe, and the upper surfaces of the novel ring bricks and the upper surfaces of the hearth bricks are positioned on the same horizontal plane; the purpose of this is: the structure of the original ramming material is cancelled, the novel ring brick is adopted for replacing, the weak links of the circulating pipe brick are reduced, the molten steel scouring resistance of the position is improved, and the service life and the replacement period of the RH furnace circulating pipe are prolonged.

The utility model has the advantages that:

1. the novel ring bricks are additionally built on the upper surfaces of the ring bricks on the traditional circulating tube, so that the ring bricks are horizontal to the bottom of the vacuum chamber, the adverse conditions of molten steel accumulation and the like caused by the sinking and deformation of the bottom of the furnace are eliminated, the integral performance of refractory materials at the bottom of the furnace is enhanced, the service performance of the circulating tube bricks is improved, the service life of the circulating tube of the RH furnace is prolonged, the replacement cycle of the circulating tube bricks is prolonged, and the operation benefit of RH furnace equipment is greatly improved;

2. the utility model cancels the original ramming material and is replaced by the novel ring brick, thereby reducing the weak links of the circulating pipe brick, increasing the molten steel scouring resistance of the key position, and prolonging the service life and the replacement period of the RH furnace circulating pipe;

3. the utility model provides a because the box hat sinks, warp and lead to building by laying bricks or stones the problem that the degree of difficulty increases, effectively guaranteed to build by laying bricks or stones the quality, make circulation tubular brick work under good condition, can guarantee safety in production.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a perspective view of the present invention;

FIG. 3 is a schematic structural view of a prior art circulation brick;

fig. 4 is a perspective view of a prior art circulation brick.

The labels in the figure are: 1. novel ring bricks; 2. a ring brick is arranged on the circulating pipe; 3. a lower ring brick of the circulating pipe; 4. a hearth brick; 5. ramming the material; 6. the dipping pipe is provided with a ring brick.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in figures 1-2, a novel structure of RH furnace circulating pipe, including around ring brick 2 and circulating pipe lower ring brick 3 on the circulating pipe of furnace body inner wall, ring brick 2 is built by laying bricks or stones by the wedge of a plurality of quantity respectively on the circulating pipe, ring brick 3 is built by laying bricks or stones by the wedge of a plurality of quantity equally under the circulating pipe, ring brick 2 is built by laying bricks or stones and is set up ring brick 3 upper portion position under the circulating pipe on the circulating pipe, it has novel ring brick 1 to build by laying bricks or stones at the top of ring brick 2 on the circulating pipe, the upper surface of novel ring brick 1 is in on the same horizontal plane with the upper surface of bottom brick 4.

And an immersion pipe upper ring brick 6 is arranged below the circulation pipe lower ring brick 3, and the immersion pipe upper ring brick 6 and the circulation pipe lower ring brick 3 are concentrically arranged.

Specifically, the inner diameters of the ring brick 2 on the circulating pipe, the ring brick 3 under the circulating pipe, the novel ring brick 1 and the ring brick 6 on the dip pipe are equal, so that the inner wall bricks of the circulating pipe are parallel and level to each other, and the circulation of molten steel is facilitated.

Claims

1. The utility model provides a novel structure of RH stove circulating pipe which characterized in that: including surrounding ring brick and ring brick under the circulating pipe on the circulating pipe of furnace body inner wall, ring brick is built by laying bricks or stones and is set up ring brick upper portion position under the circulating pipe on the circulating pipe, and the top of ring brick is built by laying bricks or stones on the circulating pipe has novel ring brick, and the upper surface of novel ring brick is in on the same horizontal plane with the upper surface of bottom of a furnace brick.

2. The new structure of the RH furnace circulation pipe of claim 1, wherein: and an upper ring brick of the dip pipe is arranged below the lower ring brick of the circulating pipe, and the upper ring brick of the dip pipe and the lower ring brick of the circulating pipe are concentrically arranged.