CN201348442Y

CN201348442Y - Refractory brick for permanent lining at bottom of large-scale revolving furnace

Info

Publication number: CN201348442Y
Application number: CNU2009200176569U
Authority: CN
Inventors: 吕铭; 武光君; 李洪建
Original assignee: Laiwu Iron and Steel Co Ltd
Current assignee: Shandong Iron and Steel Group Co Ltd SISG
Priority date: 2009-01-15
Filing date: 2009-01-15
Publication date: 2009-11-18
Anticipated expiration: 2019-01-15

Abstract

A refractory brick for a permanent lining at the bottom of a large-scale revolving furnace belongs to the technical field of refractory material for furnace lining of revolving furnace in metallurgical industry. The refractory brick is characterized in that the refractory brick is classified as a wedge brick with trapezoidal surface, namely, the upper face and the lower face of the brick are rectangles, the front face, the back face, the left face and the right face of the brick are trapezoids, and the front trapezoid and the back trapezoid, as well as the left trapezoid and the right trapezoid are symmetric. The refractory brick provided by the utility model solves the problem that the upper layer vertically laid bricks on the permanent lining at the bottom of the large-scale revolving furnace has design defects in shape, resulting in large brick masonry gaps of permanent lining refractory bricks and working lining magnesia carbon bricks, and heavy on-site processing work. Additionally, the masonry quality and the masonry speed are improved.

Description

A kind of mammoth conveter furnace bottom permanent liner refractory brick

Technical field

The utility model relates to a kind of mammoth conveter furnace bottom permanent liner refractory brick, belongs to converter fire proof material of furnace lining technical field in the metallurgy industry.

Background technology

At present general employing of mammoth conveter furnace bottom permanent liner burnt till magnesia brick and built by laying bricks or stones, adopts two-layerly up and down, and wherein lower floor selects generally that straight brick is flat to be built for use, and wedge type brick laid on end is generally selected on the upper strata for use.The furnace bottom shell is a sphere, and when wedge type brick laid on end was adopted on the upper strata, have following subject matter: the brickwork joint between (1) magnesia brick and the magnesia brick was bigger, can not satisfy≤standard of building by laying bricks or stones of 1mm, have to fill with magnesia powder; (2) go up bricklaying surface, on the bricklaying surface of magnesia brick and magnesia brick, form little step, rather than sphere, cause the contact-making surface out-of-flatness of upper strata magnesia brick and working lining magnesia carbon brick, cause the working lining magnesia carbon brick to build the difficult control of difficulty, laid on end brickwork joint by laying bricks or stones thus, significantly increased on-the-spot processing, polishing amount, both influenced masonry quality, influenced the speed of building by laying bricks or stones again furnace bottom working lining magnesia carbon brick.Simultaneously, the polishing of the scene of furnace bottom magnesia carbon brick has increased construction intensity, has worsened the working environment in the stove.

Summary of the invention

Be defective and the deficiency that overcomes prior art, the utility model provides a kind of mammoth conveter furnace bottom permanent liner refractory brick.

For achieving the above object, the technical solution adopted in the utility model is.

A kind of mammoth conveter furnace bottom permanent liner refractory brick, it is characterized in that refractory brick is the tread arch brick, promptly top, following two faces of brick are rectangles, and front, back, four the brick faces in the left side and the right side all are trapezoidal, and the front is trapezoidal and the trapezoidal symmetry in back, the trapezoidal symmetry in the left side and the right side.

The height H of described tread arch brick is 230～300mm.

The following rectangular length of described tread arch brick and wide being respectively: long c is 110～120mm, and wide d is 90～110mm.

Preferably, the following rectangular length of described tread arch brick and wide being respectively: long c is 115mm, wide d=100mm.

The top rectangular length of described tread arch brick and widely calculate according to formula respectively: long a=cxR _On/ R _Down, wide b=dxR _On/ R _DownWherein: R _On, R _DownBe the crooked radius of circle (seeing the sign among Fig. 2) of the residing converter furnace bottom of upper and lower two end faces of tread arch brick.

The utility model has solved the permanent liner refractory brick that mammoth conveter furnace bottom permanent liner upper strata laid on end refractory brick causes because of brick type design defect, the brickwork joint of building by laying bricks or stones of working lining magnesia carbon brick and has reached problems such as on-the-spot processing capacity is big greatly, both improve masonry quality, improved the speed of building by laying bricks or stones again.

Description of drawings

Fig. 1 is the schematic perspective view of tread arch brick, and Fig. 2 carries out mammoth conveter masonry of well structural representation for using the utility model.

Wherein, 1, the full tread arch brick of furnace bottom permanent liner upper strata laid on end magnesia brick, 2, the flat straight shape brick of magnesia brick of building of furnace bottom permanent liner lower floor, 3, furnace shell, 4, the flat magnesia carbon brick of building of furnace bottom working lining periphery, 5, furnace bottom working lining laid on end magnesia carbon brick, 6, furnace bottom levelling magnesian ramming mass.

The specific embodiment

Following examples are to further specify of the present utility model, but are not limited thereto.

Embodiment:

The utility model embodiment as shown in Figure 1, it is characterized in that refractory brick is the tread arch brick, promptly top, following two faces of brick are rectangles, and front, back, four the brick faces in the left side and the right side all are trapezoidal, and the front is trapezoidal and the trapezoidal symmetry in back, the trapezoidal symmetry in the left side and the right side.

The height H of described tread arch brick is 230mm.

The following rectangular length of described tread arch brick and wide being respectively: long c=115mm, wide d=100mm;

Under the top rectangular length of described tread arch brick and wide be respectively on the long a=cxR/R=and 115x6323/6553=111mm, b=dxR _On/ R _Down=100x6323/6553=96.4mm.

The foregoing description is designed according to the 120 tons of converters in Laigang.The utility model embodiment is successfully on probation on 120 tons of converter stoves of Laiwu iron and steel group silver mountain shaped steel Co., Ltd steel mill.Find when tearing stove open, in contrast groups converter furnace bottom magnesia carbon brick and magnesia brick brickwork joint, large tracts of land occurs and ooze steel, and 120 tons of converters of the utility model embodiment do not find to ooze the steel problem, have reached its intended purposes and effect.

Claims

1, a kind of mammoth conveter furnace bottom permanent liner refractory brick, it is characterized in that refractory brick is the tread arch brick, promptly top, following two faces of brick are rectangles, and front, back, four the brick faces in the left side and the right side all are trapezoidal, and the front is trapezoidal and the trapezoidal symmetry in back, the trapezoidal symmetry in the left side and the right side.

2, a kind of mammoth conveter furnace bottom permanent liner refractory brick as claimed in claim 1, the height H that it is characterized in that described tread arch brick is 230～300mm.

3, a kind of mammoth conveter furnace bottom permanent liner refractory brick as claimed in claim 1, it is characterized in that the following rectangular length and wide being respectively of described tread arch brick: long c is 110～120mm, and wide d is 90～110mm.

4, a kind of mammoth conveter furnace bottom permanent liner refractory brick, it is characterized in that the following rectangular length and wide being respectively of described tread arch brick: long c is 115mm, wide d=100mm.

5, a kind of mammoth conveter furnace bottom permanent liner refractory brick is characterized in that the top rectangular length of described tread arch brick and widely calculates according to formula respectively: long a=cxR _On/ R _Down, wide b=dxR _On/ R _DownWherein: R _On, R _DownBe the crooked radius of circle of the residing converter furnace bottom of upper and lower two end faces of tread arch brick.