SU807026A2 - Hearth-type steel melting unit - Google Patents

Description

The invention relates to ferrous metallurgy, in particular, to the design of bottom steelmaking units with removable neslobes for the production of melts. According to the main author. St. No. 752126 is known for a hearth steelmaking aggregate containing a fusion melting capacity, an outlet, an outlet plate adjacent to it and a removable one or two-strand chute. This creates the danger of penetration of metal into the laying of the bottom of the steel outlet and its emergency escape past the gutter. In addition, the seam of the docking plate of the gutter after the release of fusion entails a labor effort for cleaning it in order to level the contact surface. This can occur both at the time of crossing the steel outlet in the process of turning the chute to drain the melt residues, and during its reverse: set to the unit for removing canting chains and hooking by the crane, as the remains of slag and sometimes with metal, for a long time flow on the unit in the slag cup, located under the hole. The purpose of the invention is to reduce maintenance costs and improve the reliability of the device. The goal is achieved by the fact that the lining of the outlet plate of the unit at the point of contact with the gutter connecting plate is made in the form of a carbon block. In this case, the docking plate of the gutter can be made in the form of lateral joining plates, and the refractory 1short of the end wall is flush with their outer surface, with the ratio of the distance between the lateral docking plates to the diameter of the steel outlet orifice being 2-4. Refractory masonry of the end wall of the gutter between the side docking plates can be performed on a monolith; refractory material (block).

FIG. 1 shows schematically the described hearth steel-making unit, vertical section; in fig. 2 and 3 - horizontal and vertical sections of the docking station of the gutter with the unit.

The hearth steelmaking unit 1 has an outlet opening 2 and an outlet plate 3 with cheeks 4 to which a single or double strand chute 6 is connected to the refractory mass 5, the butt plate 8 7, the end wall 8 and the bath 9 formed by the bend of the bottom. On the basis of the outlet plate 3 below the replaceable part of the refractory masonry, the holes 2 and in the places of its contact with the end wall of the groove are installed the carbon block 1O. In the laying of the end wall of the gutter can be installed unit 11.

Hearth steel unit operates as follows.

The presence of a carbon block 10 between the cheeks 4 of the discharge plate 3 eliminates the crushing and mechanical destruction of the felting in this place when the gutter is rocking, because the integral joint plate 7 (fig. L Ш7.И is made on the sides of the side plates (fig. 2) slides along the metal The cheeks 4 of the starting plate 3 of the unit, and in the center under the hole 2 of the carbon block 1 A. The block 10 is installed on the base of the exhaust plate 3 flush with the outer surface of the cheeks 4 and from the point of view of the possibility of its replacement during the campaign of the unit is made along the width equal to the distance between the cheeks 4. When the trough is rocked, the carbon block 1O chopio works on friction and at the same time BpeMia is highly resistant to slag, the remnants of which flow down on it after the melt is released, keeps the contact sliding surface well. the lower structure of the unit from the effect of melt residues, the discharge plate 3 and the block 10 should be extended beyond the rear wall of the unit (Fig. 1 and 2) so as to exclude the protection of the support beams by other fireproof materials with so-called aprons.

The presence of carbon block 10 in the laying of the exhaust plate 3 increases

reliability of the operation of the hearth steel-smelting unit, both from the point of view of excluding the possibility of spontaneous passage of metal into the masonry of the bottom hole 2, and through the joint of the chute with the unit. At the same time, the labor costs for caring for the steel outlet of the unit are reduced.

The joint plate 7 of the mohset gutter to be made in the form of lateral joint plates with the ratio of the distance between them to the diameter of the steel outlet hole is 2-4 (Fig. 2). In this case, the refractory pole of the end wall is flush with the outer surface of the side plates 7 (Fig. 2) and, from the point of view of increasing durability, can be made of monolithic material 1Q (Fig. 3), which can be used as carbonaceous, high alumina and others blocks or self-hardening filler mixtures. This embodiment of the end part of the removable gutter prevents seizures and ensures the integrity of the contact surface of the gutter with the unit.

Thus, the proposed design of a hearth steelmaking unit with a removable chute for the production of melts improves the reliability of the device and reduces the labor costs for its maintenance. Formula of invention

Claims (3)

1, hearth steel unit for auth. St. No. 752126, characterized in that, in order to monitor the reliability of the device and reduce the labor costs for its maintenance, the lining of the outlet plate of the unit, in the place of its contact with the end wall of the groove, is made of a carbon block. 2. The unit according to claim 1 / o tl and h ayush and with the fact that the docking plate of the gutter is made in the form of side joining plates, and the refractory masonry of the end wall is flush with their outer surface, and the ratio of the distance. between the side docking plates to the diameter of the steel outlet hole is 2-4. 3. Assembly of pop. 2, I differ from the fact that the refractory masonry of the end wall of the gutter is made of a monolithic refractory material. Sources of information taken into account in the examination 1. USSR Author's Certificate No. 752126, cl. F 27D 3/15, 1978. I I ss