SU1071639A1 - Blast furnace cooling device - Google Patents

Description

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Fig. / The invention relates to metallurgy, and more specifically to devices designed to prevent blast furnace casing from overheating. A device for the cooling of blast furnaces is known, consisting of vertical and horizontal cooled plates, the horizontal plate being located between two vertically adjacent plates. A disadvantage of the known designs is a reduction in strength. the casing because of the large cut-outs for embrasures through which horizontal molded elements with cooling tubes poured into them are introduced into the furnace. In addition, the need to fill the cooling pipes in the cast iron plate leads to the growth of grain on the metal of the pipe, its partial carburization with a decrease in strength and plastic properties. Refrigerator blast furnaces are known: furnaces, in which the protrusion is cast behind OND1HO with a stove, a cooling projection. the pipe is made with a self-contained cooling medium or at the same time with cooling pipes and the SI plate .- The disadvantage of this design is due to the massive projection located in the lower part, the metal in which solidifies as a last resort. Because of voids and cavities, the quality of the metal in the protrusion is low. The elevator faces the working space of the furnace and quickly fails, and if the protrusion iron is destroyed, the cast iron of the slab is destroyed, the casing is left unprotected from the effect of the furnace atmosphere, overheats and deforms. The closest to the invention of the technical essence is an arrangement for protecting the furnace casing, consisting of vertical ohs, placed on the plate with discontinuities in height. In the intervals between the vertical plates, support corners are located to support the refractory masonry that can extend beyond the vertical surface of the plates. into the furnace and cooling elements to cool these support angles. The cooling elements are made in the form of hollow steel boxes protruding into the furnace, and the bearing corners are laid on the cooling elements. Refrigeration elements together with the supporting corners. Fasteners to the furnace casing. The disadvantages of this design include significant loosening of the furnace casing by the cutouts, into which the cooled elements and corners are inserted. In the case of burnout of cooled elements, large areas of skin ha remain uncooled, which leads to its distortion, rupture and stopping of the furnace for repair. A large cavity in the refrigerating element and its horizontal large surface leads to overheating of the upper generator plane with vaporization and subsequent rapid burnout, moreover, in such an element it is practically impossible to organize a sufficient speed of the cooling medium (both in water and evaporative cooling). ). . The purpose of the invention is to increase the durability of the blast furnace casing and, consequently, increase the duration of the overhaul period of its operation. The goal is achieved by the fact that in the blast furnace cooling unit, supporting chilled elements are embedded in refrigerators between vertical pipes and made in the form of horizontal pipes with sleeves attached to vertical pipes on the side facing the furnace shell. FIG. 1 shows the device, a general view, - on. 2 shows section A-A in FIG. one; in fig. 3 is a section b-B in FIG. 1. The device comprises a panel consisting of cooled vertical pipes 1 with coolant outlets 2, support sleeves 3 through which pipes 4 are passed, forming a support ledge in front of the panel. A refractory lining 5 is laid on the cooling pipes 4. The cooled projection is made of thick-walled steel pipes and provides a reliable support for the refractory lining. The cooling medium is supplied separately to the panels of the vertical pipes 1 and to the protrusions of the pipes 4. The support sleeves 3 allow the cooling of the cooled pipes of the protrusion reliably. Support sleeves 3 are fixed on vertical pipes 1. The space between two adjacent pipes 4 of the protrusion should not usually exceed the size of the refractory brick so that the protrusion is the support for the lining. A variant of the projection of horizontal and inclined pipes welded into a horizontal transverse pipe connecting them is possible. It is advisable to carry out the cooled pipes, forming a protrusion, in the form of heat pipes with a heat exchanger located on the outside of the furnace casing. In the proposed device, at the projection of the protrusion, the vertical cooled pipes continue to reliably protect the furnace casing, the failure of the projection does not entail any damage to the vertical

cooled pipes, a small surface of the protrusions allows to reduce the heat removal from the reducing gases of the furnace, a small area of the internal cross section of the pipes allows you to organize high-quality cooling of them, the pipes of the protrusion are not poured during its manufacture

liquid cast iron, which eliminates the reduction of their physico-mechanical properties, the whole device is simple to manufacture and install, high resistance of the supporting protrusions ensures reliable protection of the panels against wear with charge materials, i.e. high resistance of the entire refrigerator.

ABOUT

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Claims (1)

BLAST FURNACE COOLING DEVICE, containing refrigerators with vertical cooling pipes and supporting cooling elements, which is due to the fact that, in order to increase durability, supporting Cooling elements are built into the refrigerators between the vertical pipes and are made in the form of horizontal pipes with bushings mounted on vertical pipes from the side facing the furnace casing. Figure 1