RU172546U1 - Fireproof lining of openings in the wall of blast furnace air heaters (fittings and manholes) - Google Patents

Abstract

The utility model relates to structural elements of blast furnace air heaters, in particular regenerative heaters, in which the refractory masonry of the holes in the wall of the air heater (fittings and manholes) is performed by small-piece refractory products, and can be used in various industries: mining, chemical, metallurgical and etc. The refractory lining of holes in the wall of blast furnace air heaters (fittings and manholes) includes a terminal large-block product, which may be with the remaining one, with the corresponding hole diameter, having transporting and mounting devices, for example, hinges made of heat-resistant refractory concrete, installed in the upper hemisphere of the hole and may have protrusions for interfacing with the lining of the combustion chamber or the walls of the heater. When using the utility model, the following technical result is achieved: increasing the resistance of the refractory lining of the holes in the wall of blast furnace air heaters (fittings and manholes), while the labor and time of manufacturing the lining are significantly reduced. 3 ill.

Description

The utility model relates to the structural elements of blast furnace air heaters, in particular regenerative heaters, in which the refractory masonry of the holes in the wall of the air heater (fittings and manholes) is performed by small-sized refractory products, and can be used in various industries: mining, chemical, metallurgical and etc.

Known refractory masonry (lining) of holes in the wall of air heaters (fittings and manholes), which is performed in several rounds. In this case, the lining is carried out by small-sized products as follows: in two inner windows, mullite-corundum products of the MKV-72 brand are used. In the last outer rounds - chamotte-kaolin products of the ShKL-1,3 brand (first) and chamotte lightweight products of the ShL-1,0 brand (second). Insulation from heat-insulating cardboard is glued onto the casing of the fittings.

External okat products should be tightly pressed to the thermal insulation. Voids between the casing and the masonry are not allowed. Additionally, a detachable vertical seam of not more than 3 mm in each masonry ridge is provided. To relieve masonry loads from the weight of the upstream masonry, unloading arches from larger products are provided, where it is structurally possible, in the walls of the heater and the combustion chamber.

The disadvantages of the known lining are the complexity of manufacturing - considerable labor and manufacturing time, low durability and a short overhaul period, due to its chipping, subsidence of brickwork, falling out of castle bricks and collapse during operation. [Yu.P. Bayshev. Blast furnaces and air heaters (structures, operational impacts, material properties, calculations). Scientific publication. Yekaterinburg: Ural Branch of the Russian Academy of Sciences, 1996].

The closest in technical essence is the refractory masonry (lining) of the holes in the wall of the blast furnace air heater, selected as a prototype, in which a high-alumina castle T-shaped block is used in the upper and lower parts of the external okata, on both sides of which an L-shaped brick is used high alumina bricks forms. The upper half of the inner ridge is made of wedge-shaped bricks with a protrusion and a groove for interfacing with neighboring bricks, with the exception of the central and two horizontal edging bricks. The lower part is made of high-alumina bricks only wedge-shaped. [Application CN 201310055145/7 dated 02.21.2013, publication number 103088179 dated 05.08.2013 IPC С21В 9/06, С21В 9/02, С21В 9/10, F27D 1/04]. The disadvantages of the prototype include significant labor costs and the duration of manufacture during its implementation. Despite the fact that the well-known refractory lining can increase resistance, however, spalling, sagging of brickwork and the likelihood of falling out of brick does not preclude its collapse during operation and the heater stops for repair.

The task to which the claimed utility model is directed is to increase the resistance of the refractory lining of the holes in the wall of blast furnace air heaters (fittings and manholes), as well as reducing labor costs and the timing of its manufacture.

The task is achieved in that the refractory lining of the holes in the wall of blast furnace air heaters (fittings and manholes) includes an end large block product, which can be composite, with a corresponding diameter of the hole in a standard size, having transporting and mounting devices, for example, loops made of heat-resistant refractory concrete, installed in the upper hemisphere of the hole and may have protrusions for interfacing with the lining of the combustion chamber or the walls of the heater.

The technical result, which is achieved by the given set of features, is to increase the resistance of the refractory lining of the holes in the wall of blast furnace air heaters (fittings and manholes) through the use of a terminal large-block product made of heat-resistant refractory concrete, providing increased operational reliability - low risk of collapse of the lining. In addition, the laboriousness and terms of manufacturing the lining in the end part of the holes are significantly reduced, due to the exclusion of the use of small-piece products.

The inventive utility model is illustrated by drawings, where:

FIG. 1 - 3D model of the terminal large-block product in a single and composite embodiment;

FIG. 2 is a longitudinal section through the lining of an air heater with an installed large block product end;

FIG. 3 is a cross-sectional view of a lining of an aperture of an air heater with an installed end large-block product.

The inventive refractory lining of openings in the wall of blast furnace air heaters (fittings and manholes) includes an end large block product 1 (Fig. 1, 2, 3), which can be composite, with a corresponding hole diameter of a standard size, having transportation and mounting devices (not shown in the drawings ), for example, hinges made of heat-resistant refractory concrete, installed in the upper hemisphere of the hole, and may have protrusions 2 for interfacing with the lining of the combustion chamber 3 (Fig. 2) or the walls of the heater (for h Ertezh not shown).

Refractory lining of holes in the wall of blast furnace air heaters (fittings and manholes) is carried out as follows. Only the lower hemisphere of the lining of the holes in the end part with small piece products is performed, to the length of the end large-block product. The surface of the brick lining of the lower hemisphere is leveled in a horizontal plane using a solution of mullite-corundum mortar of a creamy consistency. The terminal large-block product is installed on the lower hemisphere of the hole using a lifting mechanism, for example, a crane-beam. A large-block product is paired with the lining of the combustion chamber or with the walls of the air heater along the projections of the product, if any, or they are continued to be laid with small-sized refractory products by cutting them end-to-end to the terminal large-block product. The voids between the terminal large-block product and the adjacent masonry are filled with a solution of mullite-corundum mortar.

Claims (1)

Refractory lining for the hole in the wall of the blast furnace air heater in the form of a fitting or manhole, characterized in that it is made in the form of an end composite large-block product for installation in the upper hemisphere of the hole in the wall of the heater made of heat-resistant refractory concrete in the form of a hemisphere, the diameter of which corresponds to the diameter said hole, and with protrusions for interfacing with the lining of the wall of the heater.

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