CN101251335A

CN101251335A - Method for placing converter liner with helix mode

Info

Publication number: CN101251335A
Application number: CNA2008100472079A
Authority: CN
Inventors: 万小平; 姜鹰; 王保元; 邵东; 薛启文
Original assignee: Wuhan Iron and Steel Group Corp
Current assignee: Wuhan Iron and Steel Group Corp
Priority date: 2008-04-01
Filing date: 2008-04-01
Publication date: 2008-08-27
Anticipated expiration: 2028-04-01
Also published as: CN101251335B

Abstract

The invention relates to a spiral masonry method for a converter lining. The method comprises the following steps : the first step: a ring bottom layer of a converter lining is built by laying ladder bricks with different thicknesses (1) along the inner wall of a converter, the top ladders of the ring bottom layer spiral upwards; the second step: the middle part of the converter lining is spirally and upwards built by laying standard bricks (2) on the ring bottom layer along the inner wall of the converter; the third step: a ring top layer is built by laying the ladder bricks with different thicknesses (1) along the inner wall of the converter, the underside ladders of the ring top layer spiral downwards, the top of the ring top layer is continuous and horizontal, the steps are completed. The ladder bricks (1) and the standard bricks (2) are all vertical wide cuneiform firebricks. The spiral masonry method for the converter lining changes the layer of layer ring masonry method to the spiral masonry method, avoids the weakness that the 'folding bricks' are masonries, and realizes 'seamless' connection. The spiral masonry method for the converter lining significantly improves the converter masonry efficiency, and also improves the security and prolongs the service life because the intensities of the masonries are improved.

Description

The spiral building method of converter lining

Technical field

The present invention relates to steelmaking converter, be specifically related to the building method of the furnace lining of converter, particularly converter lining.

Background technology

Steelmaking converter, as oxygen top-blown converter etc., its body of heater is made up of truncated cone shape furnace crown, cylindrical shaft and segment shape furnace bottom etc., is equipped with the furnace lining of being built by laying bricks or stones by refractory brick in shaft and the furnace crown.

At present, steelmaking converter furnace lining 5 fire-resistant laying bricks generally adopt successively annular block method to build (shown in Fig. 7,8) by laying bricks or stones.The major advantage of successively annular block method: do not need to use special shaped brick.But its shortcoming is:

Must adopt when 1, closing up owing to every layer of brick and close tweel block, closing tweel block is the weak link of masonry, and brickwork joint is difficult to control, close Men Shike and close door with number adjustment of several bricks or processing brick, the brick intensity after the processing is vulnerable to influence, therefore, must retrofit, forbid to use the tweel block that closes that occurs crackle after the processing.

2, owing to every layer of " closing door " width difference, so every laminated tweel block all will be processed, the brick processing capacity is very big.Particularly converter is fascinated before and after wanting in smelting process, turning angle is ± 360 °, often owing to be difficult to reach retrofit, cause this position to be weak link, this closes tweel block in the converter inclining process, occurs probably " it is heavy to take out ", or falls brick, cause the masonry unstability, the bleed-out accident appears in indivedual stoves.So, " the brickwork handbook require " when converter is bonded, stay 3 positions that brick is wide at He Menchu, middle with the 2-3t jack brick on both sides is held out against after, build by laying bricks or stones again and close tweel block.A sheet iron wedging of in brickwork joint, squeezing into specific thickness when closing ".This method brickwork is not only time-consuming but also take a lot of work, and masonry every layer " closing door " locates all to exist hidden danger.

Summary of the invention

Technical problem to be solved by this invention is: provide a kind of spiral building method of converter lining, this method efficient height, good, the long service life of furnace lining intensity height, security of building by laying bricks or stones.

The present invention solves the problems of the technologies described above the technical scheme that is adopted:

The spiral building method of converter lining, its method step is:

The first step, build the annular bottom of furnace lining with the different ladder brick of thickness by laying bricks or stones along the converter inwall, the end face step helix of annular bottom upwards;

Second goes on foot, upwards builds by laying bricks or stones at annular bottom upper edge converter spiral inner wall with standard brick the middle part of furnace lining;

The 3rd step, build the annular top layer of furnace lining with the different ladder brick of thickness by laying bricks or stones along the converter inwall, the bottom surface step helix of annular top layer is downward, the continuous and level of the end face of annular top layer, finished product;

Above-mentioned ladder brick, standard brick are perpendicular wide wedge shape refractory brick.

In the such scheme, the apical side height difference that annular bottom closes up the place equates with the thickness of standard brick.

In the such scheme, described annular bottom is made up of the underlayer of ladder brick and part ladder brick below.

In the such scheme, described annular top layer is made up of the last bed course of ladder brick and part ladder brick top.

The spiral building method of converter lining of the present invention is built the converter lining cutting and is changed spiral into by annular block method successively and build method, and cancellation " closing tweel block " is the weak link of masonry, realizes that " seamless " connects.Brickwork efficient is improved greatly, and this external cause masonry strength improves its security and also improve service life.

Description of drawings

Fig. 1 is the schematic diagram when building furnace lining by laying bricks or stones with the inventive method

Fig. 2 is for building the expansion schematic diagram of furnace lining by laying bricks or stones with the inventive method

Fig. 3 is the structural representation of annular top layer brick layer

Fig. 4 is the structural representation of furnace lining middle part brick layer

Fig. 5 is the structural representation of annular bottom brick layer

Fig. 6 is the vertical view of perpendicular wide arch brick

Schematic diagram when Fig. 7 builds furnace lining by laying bricks or stones for existing successively annular block method

Fig. 8 builds the expansion schematic diagram of furnace lining by laying bricks or stones for existing successively annular block method

The specific embodiment

The spiral building method embodiment of converter lining of the present invention, its method step is:

The first step, build the annular bottom of furnace lining with the different ladder brick 1 of thickness by laying bricks or stones along the converter inwall, the end face step helix of annular bottom upwards; The annular bottom is made up of the bed course 3 of ladder brick 1 and part ladder brick 1 below.

Before building by laying bricks or stones, can at first select the ladder brick of annular bottom, these ladder bricks can be formed a ring spiral rising ladder, with above convenient with standard brick along building on this ring ladder " slitless connection " screw, circle be drawn close, be returned to every brick can spirally " " along the furnace wall until being built into circular furnace lining (as Fig. 1,2).So core is to select to form furnace lining annular bottom (ground floor) the ladder brick of spiral, comprises the dimensional parameters and the quantity of brick, is selected by following method:

(1-1) select annular bottom lift angle

Lead angle is similar to the lead angle of selecting common internal thread.Can determine the maximum height difference (as H-G among Fig. 2) of the end face of annular bottom according to the thickness of top standard brick 2, thereby determine the gradient of spiral rising ladder, because of the converter diameter is a definite value, launching its perimeter L also is definite value, as long as determine high H-G, can try to achieve the gradient of spiral rising ladder.The perpendicular wide arch brick in YB/T 060-2007 " the steelmaking converter refractory material geomery " standard and the thickness of furnace crown brick are 100mm, institute thinks that forming standard brick docks with the ladder brick, the apical side height difference that the annular bottom closes up the place equates that with the thickness of standard brick promptly annular bottom closes up place's discrepancy in elevation and also is 100mm.

(1-2) adjacent ladder brick ladder height span

The ladder brick is the different perpendicular wide arch brick of thickness, promptly abnormity erects wide arch brick, the annular bottom increases progressively by its thickness ladder realizes above-mentioned lead angle, ladder height is not more than brickwork joint thickness, be no more than the 2mm code requirement according to GB 50211-2004 " Code for construction and acceptance of brick works for industrial furnaces " 8.1.2 brickwork joint thickness, therefore, in the annular bottom, ladder height can not surpass 2mm between the adjacent ladder brick.

(1-3) ladder brick quantity is selected in the annular bottom

Because perpendicular wide arch brick and furnace crown brick in YB/T 060-2007 " the steelmaking converter refractory material geomery " standard are not certain specific converter radial design, so need different shaft radiuses according to converter, equally calculate two kinds of perpendicular wide arch brick of ladder brick layer and join the quantity Kd of long radius arch brick of block and the quantity Kx of minor radius arch brick by computing formula among the YB/T 060-2007, under the thick 100mm condition of brick, divide equally greater than 50 parts, could guarantee that brick break joint thickness is no more than the 2mm code requirement, if promptly Kd adds Kx less than 50, then should select brick shape else, until till greater than 50.Present embodiment annular bottom is taked the method for two joint ladder brick layer relay (as Fig. 2), be that annular bottom is divided into two joints, first segment is that the ladder brick 1 and second joint are made up of the bed course 3 of ladder brick 1 and ladder brick 1 below, the thickness of underlayer 3 is 50mm, the second joint ladder brick and first segment ladder brick join, make special shaped brick quantity reduce half, Kd adds Kx only to be needed just can guarantee that greater than 25 brick break joint thickness is no more than the 2mm code requirement.And the minimum at present every ring of steelmaking converter is laid bricks limit quantity all greater than 25.

(1-4) ladder brick size Selection

Be to reduce brickmaking grinding tool quantity, the special shaped brick cross dimensions is selected identical with perpendicular wide arch brick in the YB/T 060-2007 standard, is the thickness difference.As long as obtain every layer of ladder height, every special shaped brick size just can be selected.Every layer of ladder height equals ladder brick layer total head H-G divided by special shaped brick quantity.If annular bottom ladder brick quantity is 100, calculate by mentioned above principle, ladder height overall H-G is 100mm, the ladder height of adjacent ladder brick is 1mm, so every brick thickness promptly increases progressively (as Fig. 5) with 1mm.These bricks can adopt a cover mill piecemeal compacting when moulding.

Second step, be 100mm standard brick 2 is upwards built furnace lining by laying bricks or stones at annular bottom upper edge converter spiral inner wall middle part (as Fig. 1,2,4) with thickness.

The 3rd step, build the annular top layer (as Fig. 3) of furnace lining, the continuous and level of the end face of annular top layer by laying bricks or stones along the converter inwall with the different ladder brick 1 of thickness; The annular top layer is formed (as Fig. 2) by the last bed course 4 of ladder brick 1 and part ladder brick 1 top.

The same first step of the concrete grammar of this step, the bottom surface step helix that is annular top layer is downward.

Finished product is finished building by laying bricks or stones of converter lining 5.

As shown in Figure 6, above-mentioned ladder brick 1, standard brick 2 are perpendicular wide wedge shape refractory brick.

The embodiment of the invention compared with prior art has the following advantages:

1, ladder brick of the present invention (the perpendicular wide wedge shape refractory brick of abnormity) is to finish in brickmaking factory, does not need on-the-spot processing, and brickwork efficient is increased substantially, and brickwork efficient improves 1/3rd.

2, do not exist and close a problem, accomplish that interannular " seamless " connects, and can guarantee that all brickwork joint thickness of masonry all satisfy code requirement; Stop because of closing the brick " it is heavy to take out " that Men Buyan occurs, therefore masonry quality improves.

3, existing successively annular block method can be held load at the masonry warp-wise, axially is zero.In case ring somewhere brick comes off down, ring brick just loses support on it, may cause this position brick fall in flakes in process is fascinated in converter repeatedly.And the spiral of the present invention method of building has a lead angle because of the brick ring, can produce an axial thrust load along the brick ring, so this brick ring axially can also hold load except that holding the load at the masonry warp-wise.Therefore spiral block method makes masonry solidating raising, can not cause this position brick fall in flakes because of certain piece brick comes off, so masonry improves service life greatly, can double.

Claims

1, the spiral building method of converter lining, its method step is:

The first step, build the annular bottom of furnace lining with the different ladder brick (1) of thickness by laying bricks or stones along the converter inwall, the end face step helix of annular bottom upwards;

Second goes on foot, upwards builds by laying bricks or stones at annular bottom upper edge converter spiral inner wall with standard brick (2) middle part of furnace lining;

The 3rd step, build the annular top layer of furnace lining with the different ladder brick (1) of thickness by laying bricks or stones along the converter inwall, the bottom surface step helix of annular top layer is downward, the continuous and level of the end face of annular top layer, finished product;

Above-mentioned ladder brick (1), standard brick (2) are perpendicular wide wedge shape refractory brick.

2, the method for claim 1 is characterized in that: the apical side height difference that annular bottom closes up the place equates with the thickness of standard brick (2).

3, the method for claim 1 is characterized in that: described annular bottom is made up of the underlayer (3) of ladder brick (1) and part ladder brick (1) below.

4, the method for claim 1 is characterized in that: described annular top layer is made up of the last bed course (4) of ladder brick (1) and part ladder brick (1) top.