SU410092A1 - - Google Patents

Description

one

The invention relates to the field of ferrous metallurgy, in particular to devices for cooling blast furnaces.

Pig-iron plate-type refrigerators with steel pipes poured in them are known, and their cooling water circulates around them. Refrigerators are bolted to the furnace bottom shell. The space between the refrigerators and the furnace casing is filled with a refractory solution, the gap between the refrigerators is cast iron putty, however, under the conditions of operation of furnaces with increased gas pressure at the top of the furnace, cases of burnout of refrigerators in the area of the cast-iron notch increased significantly. In order to eliminate gas seepage, the liquid refractory solution is pressed into the space between the furnace shell and the refrigerators according to a fixed schedule. The effectiveness of this pressing-in is insufficient, since soon after its implementation, the gas seepage resumes with the same force again. At the same time, the liquid pressing in of the solution brings significant harm, since the evaporating moisture from the solution passes through the cast-iron putty between the refrigerators and reacts with carbon from the carbonaceous layer of the hearth and bottom. As a result, the destruction and wear of the masonry is accelerated. In that

One of the causes of severe accidents is the breakthrough of liquid iron through the bottom of the furnace.

The proposed refrigerator is characterized in that its casing is made with flat metal fins located at the corners of the vertical and horizontal walls, which serve to connect the refrigerator system and the lower furnace casing into a single unit. Such an embodiment of the refrigerator eliminates the main reason for the leakage of gas through leaks, including through the case of the cast iron tap hole, which causes the number of burnouts of refrigerators in the cast iron plug area to decrease dramatically. Eliminating the need to press liquid refractory mass into the casing increases the resistance of the refractory masonry of the hearth and bottom, which partially warns the occurrence of liquid iron breakthroughs through the bottom and the hearth of the blast furnace and reduces gas pollution near the furnace.

FIG. Figure 1 shows the refrigerator in axonometric projection, where a is the side of the refrigerator adjacent to the furnace casing, b is the upper horizontal side of the refrigerator, 8 is the side vertical side of the refrigerator; in fig. 2 is the same, where g is the side of the refrigerator adjacent to the kiln stove; r is the bottom horizontal side of the refrigerator; in fig. 3 shows a general view of the fitment of refrigerators in the case when their upper and lower rows have a mismatch of joints; in fig. 4 shows a section along A-A in FIG. 3; in fig. 5 is a section along BB in FIG. 3 (when the upper and lower rows of joints along the 5 vertical lines do not match); in fig. 6 is a section along BB in FIG. 4 (in the case of coincidence of the joints of the upper and lower row of refrigerators). The slab cooler for the lower blast furnace is a cast-iron cast body 1 with steel pipes 2 embedded in it through which cooling water circulates. In the case 1 of the refrigerator, on its vertical and horizontal ends, steel strip-ribs 3-8 are poured15, which are used to fasten the coolers to each other and to the furnace shell 9 using a weld 10. At each vertical end of the refrigerator case 1 (Fig. 1, 4 and 5), which comes to the furnace casing 9 from the side a of the refrigerator, is made along one steel strip-edge 3. There, on the upper horizontal end of the refrigerator, a steel strip-edge 4 is made. In the lower part25 of the refrigerator, such a strip is not needed, so how to mount it when mounted By welding to the casing 9 of the furnace is not possible. From the d side of the refrigerator case 1 in the vertical ends of the refrigerator (Figs. 2 and 3), on both its ZEN sides, there is one vertical strip-edge 6, and in the horizontal ends there is also a single steel strip-edge 5 above and below. In the space in between the two refrigerators, on each of its top-35 ends, there is one double-horned band-8 which allows welding of the refrigerators to each other at the joints (Fig. 6) in the horizontal plane. There, in the lower part of the end of each refrigerator, one steel strip-rib 7 was made, allowing the upper and lower rows of refrigerators to be welded to each other, if the joints of the strip-ribs 7 and 8 coincide. the lower row of 45 verticals do not coincide (Fig. 3), the intermediate segment 11 is installed. The lower 4 row of refrigerators are manufactured with welding of the segment 11 and the upper part of the side b of the refrigerator through ribs 4, 5 and 8 using welds 10. In this case, the coolers of the upper row and welded TC weld 10 through the strip-ribs 5 and 7 to the intermediate segment And, and he, in turn, to the furnace shell 9 (Fig. 3 and 5). The cast iron cooler body is cast in the foundry as follows, Steel ribs 3-8 with help and electric weldings are welded together in an appropriate frame and then, together with steel pipes 2, are laid in the corresponding places of the molded mold for casting. After the casting of the refrigerator, the ends of the strips-ribs 3-8 are machined. During installation, the possibility of electric welding of all strips-ribs to the furnace casing is provided only on the first refrigerator, installed in the lower row. Further installation should move in two directions to the right and to the left of the first refrigerator. Depending on the direction of installation, one of the sides, right or left, will not have welds 10 for the strip ribs 7 and 8 (Fig. 6). Leads and outlets of water for cooling refrigerators are mounted in a conventional way into the general cooling system. Refrigerators of this design should be installed only for the tuyere zone, the metal receptacle and the floor to a level approximately 2 m below the level of the cast-iron notch, the subject of the invention. that, in order to increase the tightness of the joints between the refrigerators, the refrigerator case is provided with flat metal fins spaced at the corners of the vertical and horizontal walls.

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