DE1458800A1 - Thin-walled blast furnace - Google Patents

Description

PATENT ADVOCATE

A% * * 757 Baden-Baden

. VOgi BeuHenmülIerstr. 8

Telephone 744 »

Applicant. YAWATA IROIi & STEEL 00., LTD

TSo 1, T-chome. Marunouchi. Ghiyoda-ku, Tokyo, Japan

Thin-walled blast furnace

The invention relates to a thin-walled blast furnace, the thin lining of which in the sheep, the coal sack and the East one has uniform thickness, with attached to the inside of the shaft jacket supports for the bricks for subdivision the weight of the brick lining and in the vicinity of the coal saok on the jacket arranged support elements and supports for Interception of the shaft weight.

In the known blast furnaces, the lining is made by the nascent gases and the charges during operation attacked. Such wear and tear is particularly great in blast furnaces into which fuel oil is blown in «, in order to avoid this The number of wear and tear that shortened the life of the blast furnace was in the lining of the shaft, the coal sack and the East used cold boxes increased to by their Cooling effect to reduce the wear and tear of the brickwork.

Thin-walled blast furnaces are known whose thin lining in the shaft, the coal sack and the East are uniform Have strength. Such a blast furnace has a jacket composed of several segments. The the East and the jacket surrounding the frame is thicker-walled than the Sohachtia jacket and is used to carry the weight the shaft jacket and the lining in the shaft and the East ο

Because the Schachtmafcel and the Eastmantel are perfect are designed differently, the construction of the blast furnace is complicated and time-consuming the East, which have to bear the weight of the bricks above them, must be specially set, which is awkward and therefore it is uneconomical.

j? .O $ 80 7/077 8

There are also thin-walled blast furnaces are known in which on the inside of the Schachtmaifcels supports for the bricks are attached to subdivide the weight of the brickwork, the brickwork in the detent and the furnace part below the detent are stronger in these blast furnaces than in the shafts The jacket surrounding the detent and the furnace part underneath are executed separately. The construction of such a blast furnace is thus complicated and impractical.

The invention is based on the object of proposing a blast furnace which is extremely simple in construction, therefore easy to build and which is permanently in operation _{or the like}

This object is achieved according to the invention in that

in the thin-walled furnace that builds the lining in the shaft, The coat that surrounds the coal sack and the rest is known in itself Formed from a single, coherent piece and a number of beams supported by struts are arranged on the outside of the jacket near the coal sack »

Appropriately, in the lining in the shaft, the coal sack and the rest are arranged in a known manner cooling box,

Hach a further embodiment of the invention could be the Beams connected to the struts via double-T beams or be suspended from the double T-beams by means of rods or rings <,

In the drawings are known thick-walled and thin-walled blast furnaces in picture 1 and 2 and in the following pictures an embodiment of the invention shown:

Figure 3 is a longitudinal section of a blast furnace according to the invention.

Figure 4 is an enlarged view of Part A of the blast furnace shown in Figure 5.

Figure 5 is a section along the line X-X of the furnace part shown in Figure 4.

Fig. 6 and 7 show different ways of supporting or the suspension of the girders.

909807/0776

The blast furnace shown in Figure 1 with the shaft supported by struts consists of a brick lining 1 in the shaft 8 and the coal sack 9, a brick lining 2 in the coal sack 9 and the East 10 as well as a wind form 15 and a carbon brick lining 3 sealing materials 6 and 7 are used between the shaft jacket 4 and the lining 1 or between the hurry jacket 5 and the corresponding lining for the expansion of the bricks and as a gas seal. The lining in the shaft 1, the jacket 4, the locking jacket 5 connected to a support ring 17, the sealing materials 6, cooling box 11 and the gout 12 are supported by struts 13 by means of the support ring 17. The weight of the brick lining 2 in the coal sack 9 and the rest 10, the cooling box 14> the wind form 15 and the like are borne by the bottom brick lining 3. The blast furnace is thus built very stably, but such a blast furnace must have an extraordinarily thick walling so that it and the struts for the shaft can abut on the support ring. Therefore, a large amount of bricks is required. Furthermore, since the lining 1 in the coal sack 9 in the blast furnace is thick and the lining in the detent is thin and since the support ring is also provided for the shaft, it is difficult to arrange the cooling boxes uniformly. As a result, the part of the bricks in front of the cooling box wears out less than a month after the start of operation, i.e. after the furnace has been ignited . Furthermore, the dropping of the load destroys the cooling box at the upper part of the detent 10. All these causes destroy the protective bricks in the vicinity of the junction of the coal sack 9 and the detent 10 and the profile line 16 shifts to the line 16 ¹ , which is the extent the wear shows. This creates a gas leak in the vicinity of the aforementioned connection point, as a result of which the jacket is exposed to the high temperature inside the blast furnace at this point and the service life of the blast furnace is shortened.

9 0 9 8 0 7/0776

OWGiNAU

To avoid the disadvantages of thick-walled blast furnaces described above, free-standing thin-walled blast furnaces were used. As can be seen from Figure 2, the blast furnace is constructed in such a way that the lining 29 and 30 from the G-icht to the bottom of the coal sack 9 have an almost uniform thickness _e The lining in the coal sack is directly with the lining 31 in the east connected, to which the ground lining 32 adjoins. These lining are surrounded by a single jacket 33 and the lining in the East 31 and the soil lining 32 are cooled by a water pipe 35. In the thin-walled blast furnace, the cooling boxes 34 can be arranged uniformly. These can therefore uniformly cool the blast furnace and a gas leak in the vicinity of the connection point of the coal sack 9 and the Eas.t 10 can hardly occur. The brickwork in the detent 31 of this blast furnace must, however, be very strong in order to absorb the weight of the masonry lying on top. Furthermore, the jacket 33 surrounding the entire blast furnace is very thick _e If the brickwork in the coal sack 30 or East 31 is heavily used or if the strength of the brickwork is reduced by high temperatures, some bricks usually fall out of the brickwork. Furthermore, it is very difficult in the plant to increase the number of tuyeres due to the way in which the jacket supports the blast furnace.

An exemplary embodiment of the invention is described in more detail below with reference to Figs. 3-7. As can be seen from Figures 3, 4 and 5 , the thin lining of the blast furnace in the shaft 18, the coal sack 19 "and the East 20, also at the junction of the two linings 18 and 20, has a uniform thickness. The bottom 21 of the blast furnace is The profile line 22 of the structure and the profile of the furnace shell 23 form a continuous line.

At the junction of the lining 18 and 20 are numerous beams 24 for the bricks on the inside of the shaft casing 23 pounds ur subdivision of the weight of the brickwork appropriate. The resulting gap between the brickwork serves for the expansion of the bricks. The brick lining

909807/07 7 6

in Sohacht 22, in Kohlensack 19- und.der East 20 is surrounded by a single continuous coat 23. The space between the masonry ^ and .the jacket is filled with a sealing material 25 f that a free expansion of the bricks enables. · And. at the same time seals the ho-chofen. Numerous supported by struts 27; ! rager 26 is, for example, attached to the outside of the jacket of the carbon bag 19 by welding «

To support the blast furnace, numerous struts 27, ΖσΒ «, 8-9 struts in a 1500 to blast furnace, used.-Es ■ but can also use other systems to support the blast furnace can be used «, 'As shown in" Figure 6a and b, the support 26an welded to the jacket over the latter oi'dneten double-ii-girders hung by means of rods-36 or rings be ,, ■■ '■ "■ ■ ■ - ... ...-> ■. ..

But it can also be welded to the jacket Beam 26, as can be seen from Fig. 7a and b, via double-T beams 29 to be connected to the struts 37 "

- ■■ ·.:. ■: The., Invention, enables; an even, and. thin ,. Brick lining - in the shaft, up to the floor of the East - what. So far both. known ·. Cooking> difficult. was, further. will that Weight of the masonry-by the-, attaching, the, support for the Bricks divided into three parts, namely, weight, the lining in the Schadafc, the coal sack, and the Easto Auf. . this We, ise..will. the strength of the masonry diminished, his Prevents wear and tear and eliminates the risk of the masonry collapsing .- * ·· -As a result, thin. Brick lining can be the 'ends. the entire .cooler 28 .. in a uniform. Arranged level ^ w ^ earth; and there the. Support 26 arranged on the outside of the jacket are *,;, the. -Cooling box 28.- evenly distributed, are »

- ■ -. · ■: 'Dj_ _e Kiihluhg: takes place denmaeh over, the.! Entire. -Expansion of the ¹ blast furnace and thus prevents .damage: the .ausmaut ^ 'erung, in particular the collapse of: the ^ masonry ^ in ;; the E9, .si;. ,,; the. both. usual-blast furnaces, on "tjreten", his. the coal sack. -no gasuridightness;

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due to the different wall thicknesses "caused uneven arrangement the cooling box is caused »

The blast furnace according to the invention is thus simple in construction wad has as a result of .oben described Maßnahaien, a significantly prolonged -Lifetime. opposite the b. & kannt.eii ... ■ -

a 1500 to blast furnace after the ^; Invention * -are used ^ Z ₀ B. 3073 to bricks. With a 'usual-Ήόοίί-oven of the same capacity, on the other hand, "3788- to ^; bricks are required» According to the invention,' therefore oine "'Eröparni-s" ^L vo "n ·' 18.8 fo bricks a". "- ■■■■ - · - ■ - · - _=; - ■ / .. ■ · - ^ ....

Claims (1)

Pat en'tans ρ r ü ehe Thin-walled blast furnace, the thin lining of which in the The shaft, the coal sack and the detent have a uniform thickness, with on the inside of the Manhole jacket attached embossers for the bricks to subdivide the weight of the brickwork and in the vicinity of the coal sack on the jacket arranged support elements as well as supports for absorbing the shaft weight, characterized in that the brick lining in the shaft (22), the Kohlensaek (19) and the East (20) surrounding jacket (23) is formed in a "known manner" from a single, coherent piece and one Number of supports (26) supported by struts (27) are arranged on the outside of the jacket near the coal sack, Blast furnace according to claim 1, characterized in that in the lining in the shaft, the coal sack and the East arranged in a known manner cooling box (26) are «, ■ Blast furnace according to Claims 1 and 2, characterized in that the supports (26) are connected to the struts via double - ^ - supports are connected or by means of rods or rings to the Double T-beams are suspended » NeueUi. ':' ,. · ■■ .. · 909807/0776