SU1071640A1 - Device for cooling furnace wall - Google Patents

Abstract

DEVICE FOR OXRYING THE WALLS OF THE OVEN, containing panels with vertical pipes and horizontal collectors, differs from the fact that, in order to increase the reliability of protection of the furnace shell and increase the durability of the device, the vertical pipes of one panel i are placed between the vertical pipes of the other panel and The horizontal collectors are burned one below the other. (L

Description

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The invention relates to metallurgy, and more specifically to the cooling of metallurgical furnaces, advantageously domain-specific.

A device for cooling blast furnaces is known, consisting of individual packages in the form of rectangular tubes, whose working side is studded and a refractory coating C11 is applied to them as separate inserts.

The disadvantage of the TOTAL device is in its short service life due to the fast burn-out of the refractory coating, which leads to the exposure of the shell sections over the entire surface of the shaft, overheating it with the subsequent deformation of these sections,.

The closest to the invention of the technical entity is a device for cooling the furnace wall, containing panels with vertical pipes and horizontal collectors. Both pipes and pipes are poured into a cast iron plate. Under and above the pipes, as well as between them, a layer of cast iron is provided. Each of the two rows of pipes has a, auxiliary solids and a coolant discharge L21,

The disadvantage of this device is that thermal fields with temperatures of pipes of the first row admissible for cast iron do not overlap the fields of the second row that are similar, which leads to overheating of the entire plate above the allowable limits, destruction of the cast iron, breaking of the cooling tubes with subsequent heating of the furnace casing . Cooling pipes during eLaying, liquid cast iron due to partial carburization and grain growth by the steelmaker, you lose their strength and plastic properties, which also contributes to their faster failure.

The practice of operating such refrigerators showed that no increase in the operating life was obtained, the refrigerators turned out to be much more heavy, the cast iron quickly went out of service. In addition, refrigerators with a two-row arrangement of pipes poured into cast iron have a considerable thickness — up to 350–380 mm, which leads to a decrease in the useful volume of the blast furnace, by an average of 4–5%. In such large-sized castings, large drinking voltages occur that also adversely affected. on their stamina.

The purpose of the invention is to increase the reliability of protection and increase the durability of the device.

The goal is achieved in that in a device for cooling the furnace wall.

containing panels with vertical pipes and horizontal manifolds, the vertical pipes of one panel are arranged between vertical pipes. bami the other - the panel, and their horizontal collectors are located one below the other.

Pa Fir, 1 shows the device, the general view; in fig. 2 shows section A-A in FIG. in fig. 3 - the device, side view. .

The device contains vertical pipes 1 included in collection headers 2 and 3. The cooling medium was supplied through Piping 4, and the drain. Through the piping. dy 5, which respectively. They are not with collectors 2 and 3. On the back of the device there is a thermal insulation layer b, which also protects the casing 7 from overheating.

The pipes 1 of the two. Adjacent packages are adjacent to each other and are connected to their own separate inlet and outlet manifolds 2 and 3 through one.

When one of the pipes 1 of one pa-keta comes out of service, the second package continues to work and protect the furnace casing from overheating.

Independently of each other, pipe bundles can significantly increase the reliability of the device, since upon leaving one panel the cooling effect of the pipes of the second panel will be sufficient for trouble-free operation of a blast furnace without activating external irrigation. Placing vertical pipes of one the panels in the gaps between the vertical pipes of the second panel allow you to create a uniform thermal field and thereby increase the resistance of the entire device and the refractory lining. in case of vertical pipes, it eliminates breakthroughs of heat fluxes from the internal furnace space to the casing. The device allows to increase the net volume of the blast furnace, since its thickness is much less than double-core plates with cast pipes in cast iron 1100-110 mm instead of 350-380 mm) . In addition, the reduction in the strength properties of pipes during the manufacture of the device is completely excluded, since the pipes are not filled with liquid metal. The device is easy to install, has a low metal content, is easier to manufacture, and is cheaper than double-bed cast iron refrigerators.

When it is used, the number of cuts in the furnace casing is reduced, ITO contributes to its strength, integrity and strength.

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Claims (1)

DEVICE FOR COOLING A FURNACE WALL containing panels with vertical pipes and horizontal manifolds, characterized in that, in order to increase the reliability of protection of the furnace casing and increase the durability of the device, vertical pipes of one panel i are placed between vertical pipes. bami another panel, and their horizontal collectors are located one below the other. l Jt ϊΐ , 1071640 A 1 1071640 1