CN217825416U

CN217825416U - Lower heat insulation part of electrode holder of submerged arc furnace

Info

Publication number: CN217825416U
Application number: CN202122431617.7U
Authority: CN
Inventors: 任泽龙; 董洪维; 王骧威; 孙本富
Original assignee: Tonghua Jianxin Technology Co ltd
Current assignee: Tonghua Jianxin Technology Co ltd
Priority date: 2021-10-10
Filing date: 2021-10-10
Publication date: 2022-11-15
Anticipated expiration: 2031-10-10

Abstract

The utility model belongs to the technical field of smelting equipment, hot stove electrode holder lower part thermal-insulated insulating part in ore deposit promptly. The pressure ring comprises a protection screen and a pressure ring bottom ring which are connected with each other, and is characterized in that the protection screen and the pressure ring bottom ring are in insulated connection by adopting a plurality of L-shaped reverse inverted corundum bricks side by side. The L-shaped reverse inverted corundum brick insulation structure is adopted, the self strength of the insulation structure is enhanced, the failure degree of an insulation part under the conditions of high temperature and severe furnace conditions is low, the structure is simple, the insulation performance is high, the high temperature resistance is realized, the production, the manufacture and the transportation are convenient, the installation in different working environments is facilitated, the installation is simple and convenient, the economic cost of equipment is indirectly reduced, the safety and the stability of an electrode control system are improved, and the safe and stable operation of the submerged arc furnace is ensured.

Description

Lower heat insulation part of electrode holder of submerged arc furnace

Technical Field

The utility model belongs to the technical field of smelting equipment, hot stove electrode holder lower part thermal-insulated insulating part in ore deposit promptly.

Background

In the prior art, in the design process of a traditional submerged arc furnace, the connection between the lower protection screen of the electrode holder of the submerged arc furnace and the bottom ring of the pressure ring is insulated by an insulating mica gasket and a mica sleeve (see fig. 2), the existing structure adopts a screw positioning form, the screw is often deformed due to high instantaneous temperature, the screw needs to be cut off and welded again during maintenance and replacement, and the labor intensity and the secondary investment are increased. The insulating property of an insulating part is failed, the insulating function is not achieved any more, the bottom ring and the protection screen are electrically ignited, the protection screen and the bottom ring of the pressure ring are punctured, and the protection screen, the bottom ring of the pressure ring and other parts are formed by water cooling structural forms, so that the water leakage phenomenon occurs, the cooling function cannot be achieved, a great deal of difficulty is brought to maintenance, actual production efficiency is reduced, the safety and reliability of the furnace body cannot be guaranteed, once a serious safety accident occurs, and inestimable loss can be caused to enterprise revenue and personal life safety.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to above-mentioned not enough and provide a hot stove electrode holder lower part thermal-insulated insulating part in ore deposit that insulating properties is reliable.

The technical solution of the utility model is that: the lower heat-insulating part of the electrode holder of the submerged arc furnace comprises a protection screen and a pressure ring bottom ring which are connected with each other, and is characterized in that the protection screen and the pressure ring bottom ring are in insulated connection by adopting a plurality of L-shaped reverse inverted-buckled corundum bricks side by side.

The utility model has the advantages that: 1. the L-shaped reverse inverted corundum brick insulation structure is adopted, so that the layout of the protection screen plate can be unified, and the phenomenon of prolonging the manufacturing period caused by the complexity of the process is reduced. 2. The insulating structure of the L-shaped reverse inverted corundum brick is adopted, the self strength of the insulating structure is enhanced, the failure degree of an insulating part under the conditions of high temperature and severe furnace conditions is low, the structure is simple, the insulativity is strong, the high temperature resistance is realized, the production, the manufacture and the transportation are convenient, the installation in different working environments is facilitated, the installation is simple and convenient, the economic cost of equipment is indirectly reduced, the safety and the stability of an electrode control system are improved, and the safe and stable operation of the submerged arc furnace is ensured. 3. The L-shaped reverse-buckled corundum brick is limited in position after the L-shaped reverse-buckled corundum brick is installed to the position of the reserved space after the bottom ring is installed and fixed from the installation angle, the protection screen is directly pressed on the L-shaped reverse-buckled corundum brick in a pressing mode, and the stability is good.

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic diagram of the structure of a product before improvement.

Detailed Description

Referring to fig. 1 and 2, the names of the components are as follows: the device comprises a protective screen 1, a pressure ring bottom ring 2, an L-shaped reverse inverted corundum brick 3 and a mica insulating part 4.

Referring to fig. 1, the lower heat-insulating part of the electrode holder of the submerged arc furnace comprises a protective screen 1 and a pressure ring bottom ring 2 which are connected with each other. The protection screen 1 and the pressure ring bottom ring 2 are in parallel insulated connection by adopting a plurality of L-shaped reverse inverted corundum bricks 3. In the figure 1, the connecting part is divided into three layers, the uppermost layer is a half protection screen 1, the lowermost layer is a pressure ring bottom ring 2 in the pressure ring, and the central layer is a novel insulating piece L-shaped reverse inverted corundum brick 3. The L-shaped inverted-buckled corundum bricks 3 are formed by a row of single protected screens 1 and are pressed between the protected screens 1 and the pressure ring bottom ring 2.

On the basis of the original structural design, the connecting structural form of the insulating part is changed, and the structure of the corundum bricks in parallel is adopted and made into an L-shaped reverse inverted structure form. A single-lobe insulating part adopts a structure with an included angle of 4.5 degrees, and 80 common-lobe small insulating parts are arranged around the circumference of the bottom ring to insulate the protection screen of one electrode and the bottom ring.

The corundum brick is adopted as an insulating material, the high temperature resistance reaches 1400-1500 ℃, the temperature of an original mica insulating part can reach 500-600 ℃, in the production and smelting process of the ferroalloy submerged arc furnace, due to various factors such as unstable furnace conditions and improper operation of operating personnel, the instantaneous temperature of the position of the insulating part is often overhigh and far exceeds 500-600 ℃, the performance of the insulating part is gradually invalid under the condition, along with continuous operation of equipment, when the insulating part is completely invalid, the phenomena of power connection and arc striking can occur on the protection screen and the bottom ring, the phenomena of breakdown of the protection screen, water leakage and the like occur, and production stop and maintenance are needed. The L-shaped reverse inverted corundum brick 3 has the advantages of good insulation effect, high strength, high temperature resistance, low performance failure probability under the sudden smelting condition, low failure rate and greatly prolonged service life.

The L-shaped reverse inverted corundum brick 3 is simple in structure, good in performance, not very high in one-time investment cost, convenient to install and replace, good in using effect, high in safety coefficient, and greatly reduces the potential safety hazard and secondary investment in the later period.

The above description is only for the purpose of illustrating the embodiments of the present invention, and the various illustrations should not be construed as limiting the essential contents of the present invention.

Claims

1. The lower heat-insulating part of the electrode holder of the submerged arc furnace comprises a protective screen (1) and a pressure ring bottom ring (2) which are connected with each other, and is characterized in that the protective screen (1) and the pressure ring bottom ring (2) are in insulated connection by adopting a plurality of L-shaped reverse inverted corundum bricks (3) side by side.