CN202667631U

CN202667631U - Composite safety mark for air brick

Info

Publication number: CN202667631U
Application number: CN 201120455366
Authority: CN
Inventors: 徐兵; 毛晓刚; 李有奇; 崔庆阳; 寇志奇; 赵继增
Original assignee: SHANGHAI LIRR REFRACTORY CO Ltd; Beijing Lier High Temperature Materials Co Ltd; Luoyang Lier Refractory Materials Co Ltd
Current assignee: SHANGHAI LIRR REFRACTORY CO Ltd; Beijing Lier High Temperature Materials Co Ltd; Luoyang Lier Refractory Materials Co Ltd
Priority date: 2011-11-17
Filing date: 2011-11-17
Publication date: 2013-01-16
Anticipated expiration: 2021-11-17

Abstract

The utility model relates to a safety mark for a steel ladle air brick in the ferrous metallurgy field, and particularly provides a composite safety mark advantaged by better alarming effect and higher safety; the composite safety mark for the air brick is characterized in that, the composite safety mark is in the shape of a step, a cylindrical body with the blackness coefficient different from that of the safety mark material is inserted in a section with a larger size; and the safety mark is installed at the big head part of the brick core according to the requirement of forming, and makes the small head end of the safety mark and the surface of the big head of the brick core be on the same plane.

Description

A kind of air brick composite safe sign

Technical field

The utility model relates to a kind of iron and steel metallurgical industry used secure ID in the air brick of steel ladle, particularly a kind of composite safe sign with better warning function and greater security.

Technical background

Bottom-blown air brick is the development of the outer technique of the development along with process for making, particularly stove and Emergence and Development and progressive.The development of steel industry and to the gradually increase of special steel material demand is so that the applying working condition condition of air brick progressively worsens and harsh.Take the employed air brick of external refining ladle as example, the work of air brick belongs to discontinuous operation, different phase in whole ladle turn around time can produce different physics and chemistries and corrode, and the damage reason of air brick has following several reason: (1) thermal stress.(2) souring.(3) chemical erosion.Above factor causes bottom-blown air brick in use fast than other position refractory corrosions in the ladle, thus in steelmaking process, to pay special attention to the behaviour in service of air brick, in order to avoid cause industrial accident.And field worker judges that the topmost foundation of air brick operating position is exactly the secure ID that is arranged in the air brick brick core.

The secure ID that uses in the air brick at present is of a great variety, roughly is divided into three kinds, schematic diagram such as Fig. 1,2,3 according to the difference of installation site.

The first secure ID position as shown in Figure 1, this air brick is from using for the first time beginning just can see secure ID.Secure ID just reaches the service life of air brick when disappearing, need to change air brick this moment.The safety coefficient of this secure ID is higher.But because this kind secure ID material is generally stainless steel, secure ID at first is etched easily or ablates in refining or burning oxygen cleaning process, so that form pit in the centre of brick core working face, this has accelerated the erosion rate of brick core to a certain extent, on the larger impact of air brick generation in service life.

Secure ID is positioned at the brick core inner near the position of major part among Fig. 2.In use, when the working face of air brick corrodes the secure ID position, because the coefficient of blackness of secure ID and brick core matter there are differences, the brick core is carried out can obviously seeing when heat is safeguarded that there are difference in the position of brick core center secure ID and brightness all around.When the site operation personnel observes this phenomenon, just represent that air brick will arrive safe altitude, the difference in brightness phenomenon disappears after secure ID has been etched, and air brick has reached service life.This kind secure ID is comparatively accurate to the reflection of air brick behaviour in service, secure ID need to be located with the organic line of high strength or the lifting of other material fine rules when but shortcoming was exactly the moulding of air brick brick core, during moulding by casting under the effect of shaking force the secure ID position change easily, and fire can residual next bar at the lifting rope place after finishing the perforation hole from secure ID to large women's head-ornaments.This is so that in use there is certain hidden danger in air brick, and residual cavity was oozed out the bleed-out that causes or oozed the steel accident when just once occuring molten steel from the moulding of lifting line in the use procedure of this kind air brick.

Secure ID shown in Figure 3 is positioned at air brick brick core major part.Its operation principle is when the air brick working face corrodes the secure ID position, and brick core core and surrounding brightness produce difference, reaches the service life of air brick this moment.One section of secure ID is embedded in the brick core in air brick brick core forming process, and other one section is exposed to air brick major part outside.The shortcoming of this secure ID is: the coefficient of expansion of brick core and secure ID material and line rate of change are inconsistent in sintering procedure, will produce certain slit at the position of brick core and secure ID combination.In the use procedure, molten steel oozes out from brick core and secure ID junction easily or spills when air brick use face corrodes the secure ID position, and this can produce certain potential safety hazard in use to air brick.

Summary of the invention

The utility model proposes a kind of have better warning function and the air brick secure ID of high safety factor more.In use it can better warn on-the-spot hot repair operating personnel, and because the profile of secure ID is improved on existing scheme basis, as shown in Figure 5, makes it have higher safety coefficient.Its concrete technical scheme is:

(1) secure ID adopts the independent moulding by casting of mould, and material is consistent with the brick core material.At thick that end of secure ID one section cylinder that material is different from the coefficient of blackness of brick core material is installed.Stand-by after the maintenance of secure ID process, the demoulding drying.

(2) this secure ID length is designed according to air brick brick core length and the desired remaining brick core safe altitude of steel mill, generally 100 to 200mm.

(3) this secure ID integral body is cylinder (Fig. 5), and is stepped at length direction, and the section diameter of close brick core major part is about 1/10 to 1/5 of brick core diameter at butt end, and length is 70 to 120mm; Than the part of close brick core major part thick 1～2mm progressively, every joint length is 30 to 80mm away from the part of brick core major part for all the other.

(4) inserting one section material at that thicker end during the secure ID moulding is graphite matter or stainless steel and other cylinders (part 4) different from brick core material coefficient of blackness, length is about 20 to 50mm, and diameter is about 1/3 to 2/3 of the large area of bed of secure ID.This kind structure forms the composite safe sign.

(5) prefabricated composite safe sign is installed to brick core major part position according to forming requirements during the moulding of brick core, and makes the little head end of secure ID and the large head surface of brick core be positioned at same plane (Fig. 4).

Air brick in use, when brick core working face is etched the composite safe sign, in higher temperatures (＞1200 ℃) situation, there is larger difference at the graphite matter in brick core centre or stainless steel cylinder brightness and other positions of brick core, when burning the oxygen operation, can clearly see this phenomenon, so just can warn site operation personnel's air brick and will reach service life, need pay close attention to emphatically the follow-up operating position of this air brick.When treating air brick brick core core and other positions without luminance difference, it is complete to illustrate that cylinder in the secure ID is etched, i.e. replaceable air brick.

The beneficial effects of the utility model are the safety coefficients that significantly improved when air brick uses.This secure ID installs registration, improved the accuracy that the workman judges the air brick life-span.The whole material of secure ID is identical with brick core matter, the coefficient of expansion when firing is consistent, the shortcoming of having avoided Fig. 3 secure ID to exist, adopt simultaneously stepped design to increase the stroke of secure ID and brick core joint portion, reduce molten steel in the use procedure from the possibility that secure ID and brick core binding site ooze out, further improved the use safety coefficient.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail, but not as to restriction of the present utility model.

Fig. 1 is to use at present more air brick secure ID installation site generalized section to Fig. 3.

Fig. 4 is the installation generalized section after improve on Fig. 3 secure ID profile basis.

Fig. 5 is the air brick secure ID schematic diagram after improving.

Mark is expressed as among the figure: the cylinder of installing in 1-air brick core body refractory material, 2-air brick brick core gas-permeable channels, 3-secure ID, the 4-secure ID.

The specific embodiment

With reference to air brick secure ID 3 among Fig. 1, a kind of traditional air brick secure ID installation position is for to extend to middle and lower part in the air brick from the air brick microcephaly always.

With reference to air brick secure ID 3 among Fig. 2, another traditional air brick secure ID is installed in air brick brick core inner.

With reference to air brick secure ID 3 among Fig. 3, another traditional air brick secure ID installation position is that the middle and lower part extends to the air brick major part in the air brick.

With reference to Fig. 4 and Fig. 5, the cylinder 4 of installing in secure ID 3 and the secure ID consists of composite safe sign of the present utility model.

With reference to Fig. 4, a kind of novel ventilated brick secure ID installation position is that the middle and lower part extends to the air brick major part in the air brick.

With reference to Fig. 5, a kind of novel ventilated brick secure ID integral body is cylinder, and is stepped in the longitudinal direction, and thicker than that end of brick core major part at the diameter of that end of brick core inner.

With reference to Fig. 5, a kind of novel ventilated brick secure ID is 1/10 to 1/5 of brick core diameter at butt end near that end diameter of brick core major part, and length is 70 to 120mm; Than the part of close brick core major part thick 1～2mm progressively, every joint length is 30 to 80mm away from the part of brick core major part.

With reference to Fig. 5, the cylinder 4 of installing in a kind of novel ventilated brick secure ID is installed in secure ID near that end of brick core inner.

With reference to Fig. 5, the cylinder 4 of installing in a kind of novel ventilated brick secure ID is that one section material is graphite matter or stainless steel and other cylinders different from brick core material coefficient of blackness, length is about 20 to 50mm, and diameter is about 1/3 to 2/3 of the large area of bed of secure ID.

Technique scheme of the present utility model only is for clearer explanation the utility model example, and is not the restriction to mode that the utility model is implemented.Technical staff for described field; can also make on the basis of the above description other multi-form changes; this paper can't also need not make all embodiments exhaustive, and those belong to the change that spirit of the present utility model amplifies out and still are among the protection domain of the present utility model.

Claims

1. an air brick composite safe sign is characterized in that it is stepped at length direction, inserts one section cylinder that coefficient of blackness is different from the secure ID material at larger-size that section.

2. an air brick composite safe sign is characterized in that it is installed to brick core major part position according to forming requirements, and makes the little head end of secure ID and the large head surface of brick core be positioned at same plane.