CN202499880U

CN202499880U - Furnace opening of converter

Info

Publication number: CN202499880U
Application number: CN2012201220109U
Authority: CN
Inventors: 聂波华; 陶奕文
Original assignee: Liaoning Fucheng Refractories (group) Co Ltd
Current assignee: Liaoning Fucheng Refractories (group) Co Ltd
Priority date: 2012-03-28
Filing date: 2012-03-28
Publication date: 2012-10-24
Anticipated expiration: 2022-03-28

Abstract

The utility model discloses a furnace opening of a converter, and relates to improvement of a furnace opening structure of a converter. The furnace opening is beneficial to ramming a ramming material of the furnace opening and the ramming material of the furnace opening is not removed due to thermal expansion of the furnace opening. The furnace opening comprises a working layer in an outer furnace shell, the top of the working layer is a furnace opening, the furnace opening ramming material is arranged on the furnace opening, and an upper furnace shell is arranged above the furnace opening ramming material and is connected with the top of the outer furnace shell. Through the key points of the structure of the furnace opening disclosed by the utility model, the top surface of the furnace opening is an annular inclined surface, wherein the height of an inner circle is larger than the height of an outer circle.

Description

A kind of fire door of converter

Technical field

The utility model relates to a kind of improvement of fire door structure of converter.

Background technology

Converter lining generally is divided into thermal insulation layer, permanent layer and working lining; The working lining top is a fire door, on the last plane of fire door again ramming one deck fire door ramming mass seal.The fire door upper surface of tradition converter often is a plane, and is as shown in Figure 1.This structure has following shortcoming: (1) when building by laying bricks or stones, and for level is connected, the last plane of fire door only has the trend of pushing longitudinally to the fire door ramming mass between fire door upper surface and the fire door ramming mass, and hand ramming fire door ramming mass is horizontal.

(2) be unfavorable for the release of converter magnesia carbon brick body heat stress,, all passed to last furnace shell, be easy to generate stress concentration, the phenomenon of serious meeting generation fire door brick fracture lot because the existence of " rectangle " structure makes that lining volumetric expansion power all be longitudinal force.

(3) be easy to generate the phenomenon of " the fire door material drops " after the converter ordinary production; Even can make the magnesia carbon brick layer loosening; When causing steel-making; Molten steel flows to " drill steel " phenomenon in the slit of magnesia carbon brick interlayer, thereby influences the normal use of converter, and contractor of anti-material the and steel mill have all been caused immeasurable financial loss.

Summary of the invention

The utility model is exactly to the problems referred to above, provides a kind of tamping to the fire door ramming mass favourable, and the fire door ramming mass converter mouth that can not come off because of the fire door expanded by heating.

For realizing the above-mentioned purpose of the utility model; The utility model adopts following technical scheme; The utility model comprises the working lining in the outer furnace shell, and the working lining top is a fire door, and the fire door top is the fire door ramming mass; Fire door ramming mass top is the last furnace shell that links to each other with outer furnace shell top, and the end face of the said fire door of its structural feature is the annular slope of interior circle height greater than the cylindrical height.

As a kind of preferred version of the utility model, described working lining is piled up by converter magnesia carbon brick and fire door magnesia carbon brick and is formed, and the vertical section of said fire door magnesia carbon brick is a right-angled trapezium, and the horizontal section of fire door magnesia carbon brick is an antiparallelogram; The coexist the other end of fire door magnesia carbon brick of a coexist end of fire door magnesia carbon brick of the long limit of the minor face of horizontal section antiparallelogram and vertical section right-angled trapezium, the long limit of horizontal section antiparallelogram and the minor face of vertical section right-angled trapezium.

The beneficial effect of the utility model: 1, the converter mouth of the utility model is simple in structure; Can change the shape of converter mouth through the shape that changes the fire door magnesia carbon brick; Can adopt the flat form production fire door magnesia carbon brick that the mould of laying bricks adds the base pad iron angle of tying; Also can adopt side to tie the die production of laying bricks, clip processing at the scene; Manufacture craft is simple, is easy to produce.

When 2, producing, because the fire door end face of the utility model is an inclined-plane, and the inclined-plane not only has vertical extruding to also have the extruding trend of level to the fire door ramming mass, and therefore, the utility model has promoter action to the tamping of fire door ramming mass.

3, thoroughly solved the phenomenon of converter " the fire door ramming mass drops ".In the converter production process, because the high temperature of fire door magnesia carbon brick expands, its inclined-plane is effectively pushed to the fire door ramming mass, make the fire door ramming mass further closely knit, intensity further improves; Like this, even the extraneous mechanicals efforts of converter mouth cinder bogie is arranged, the phenomenon of " the fire door ramming mass drops " can not take place yet.

4, because the fire door ramming mass of the utility model is comparatively closely knit, therefore, when the utility model uses, the phenomenon of " drill steel " can not appear; The loss of having avoided contractor of anti-material the and steel mill to suffer.

5, can alleviate the thermal stresses of fire door magnesia carbon brick effectively.Because the existence on the inclined-plane of fire door magnesia carbon brick makes the expansion squeeze of fire door magnesia carbon brick resolve into horizontal direction and vertical two component, the component of horizontal direction is owing to be effectively discharged of unlimited property in the converter, thereby reaches the effect of relief of thermal stress.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the structural representation of fire door magnesia carbon brick.

Fig. 3 is the vertical view of Fig. 2.

Fig. 4 is the structural representation of existing converter mouth.

1 is that working lining, 2 is that converter magnesia carbon brick, 3 is that fire door magnesia carbon brick, 4 is that fire door, 5 is that fire door ramming mass, 6 is that last furnace shell, 7 is outer furnace shell in the accompanying drawing.

Embodiment

The utility model comprises the working lining 1 in the outer furnace shell 7; Working lining 1 top is a fire door 4; Fire door 4 tops are fire door ramming mass 5, and fire door ramming mass 5 tops are the last furnace shell 6 that links to each other with outer furnace shell 7 tops, and the end face of said fire door 4 is the annular slope of interior circle height greater than the cylindrical height.

As a kind of preferred version of the utility model, described working lining 1 is piled up by converter magnesia carbon brick 2 and fire door magnesia carbon brick 3 and is formed, and the vertical section of said fire door magnesia carbon brick 3 is a right-angled trapezium, and the horizontal section of fire door magnesia carbon brick 3 is an antiparallelogram; The coexist the other end of fire door magnesia carbon brick 3 of a coexist end of fire door magnesia carbon brick 3 of the long limit of the minor face of horizontal section antiparallelogram and vertical section right-angled trapezium, the long limit of horizontal section antiparallelogram and the minor face of vertical section right-angled trapezium.

Claims

1. the fire door of a converter; Comprise the working lining (1) in the outer furnace shell (7); Working lining (1) top is fire door (4); Fire door (4) top is fire door ramming mass (5), and fire door ramming mass (5) top is the last furnace shell (6) that links to each other with outer furnace shell (7) top, it is characterized in that: the end face of said fire door (4) is the annular slope of interior circle height greater than the cylindrical height.

2. the fire door of a kind of converter according to claim 1; It is characterized in that: described working lining (1) is piled up by converter magnesia carbon brick (2) and fire door magnesia carbon brick (3) and is formed; The vertical section of said fire door magnesia carbon brick (3) is a right-angled trapezium, and the horizontal section of fire door magnesia carbon brick (3) is an antiparallelogram; The coexist the other end of fire door magnesia carbon brick (3) of a coexist end of fire door magnesia carbon brick (3) of the long limit of the minor face of horizontal section antiparallelogram and vertical section right-angled trapezium, the long limit of horizontal section antiparallelogram and the minor face of vertical section right-angled trapezium.