SU944758A1 - Unit for lining ingot mould hot tops - Google Patents

Description

one

The invention relates to steelmaking and is intended for use in the manufacture of two-layer lining of profitable extensions of heat-resistant concrete.

When used for lining profitable chamotte brick extensions, inserts, etc. the lining is performed manually.

A device consisting of inner formwork and manual pneumatic tamping is used for lining profitable extensions of refractory masses. The implementation of the lining using the device is costly for manual labor.

The process of manufacturing and repairing lining profitable extensions is mechanized through the use of heat-resistant concrete.

Closest to the proposed is a profitable extension with a two-layer lining of heat-resistant concrete, made of constant

And working layers, as well as installation for its manufacture.

The installation comprises a foundation with a support-fixing plate fixed on it and a hollow vibrating core mounted on shock absorbers, the outer surface of which is similar to the inner surface of the lining of a profitable extension.

The installation is intended for the manufacture of lining profitable extensions, in the case of which there is no upper shelf. If there is a profitable top shelf extension in the case, which is extremely necessary, it is impossible to manufacture the lining from heat-resistant concrete in a known installation.

Claims (2)

Profitable extensions with double-layer lining without top shelf well recommended themselves to work when siphoning steel, when the metal quietly enters the cavity of the profitable extension, contacts only the inner side surface of the lining, there is no splash and splash of molten metal on the upper horizontal surface of the lining. Ina picture takes place when casting steel from above, directly into molds. In addition to the mechanical impact on the inner side surface of the lining of moving metal flows, there are splashes and splashes of molten metal on the upper horizontal surface of the lining, the direct impact of the jet on it is also not excluded. The subsequent removal of the solidified metal from the upper horizontal surface of the lining, due to the considerable adhesion of the metal to concrete, leads to the destruction of not only the working but also the permanent lining layer and the premature exit of the lining 2. Eliminate the effect of the molten metal Lining is possible if there is an upper metal shelf in the profitable extension that is equal to the width of the lining layer. However, it is impossible to make a permanent lining layer with the in-profit extension of the upper shelf on a known installation, since the upper shelf covers the gap between the ejector core and the wall of the profitable extension body necessary for supplying heat-resistant concrete. This is the disadvantage of the known installation. The aim of the invention is to obtain a constant lining layer with a profitable top shelf extension and noBbiiueHVie-longevity in the case, as well as reduction of labor costs and specific consumption of heat-resistant concrete. The goal is achieved in that the installation comprises a foundation with a support-fixing plate fixed on it and a hollow vibro-core. mounted on shock absorbers, additionally equipped with a device for smoothly raising and lowering a profitable extension, consisting of a hollow vibrator core installed along the perimeter and firmly fixed to the supporting-fixing plate of the lower U-shaped elements above which the upper U-shaped elements are mounted with the possibility of vertical movement, and in the closed cavity formed by these elements there is an elastic airtight shell fitted with nozzles for supplying compressed air. FIG. Figure 1 shows the installation in the working position at the initial stage of manufacturing a constant layer of liners and, a section; in fig. 2 - the same in the final stage. The installation contains a foundation 1, on which a support-fixing plate 2 is fixed. On the foundation 1 a hollow core vibrator 3 is installed with a vibrator. Along the perimeter of the hollow vibration core 3, the lower U-shaped elements 5 are rigidly fixed to the support-fixing plate 2, above which the upper U-shaped elements 6 are mounted. With shock-absorbing plates 7. In a closed cavity formed by the lower and upper U-shaped elements elastic airtight shell 8 with nozzles 9 for the supply of compressed air. On the vibrating core 3, a housing of a profitable extension 10 is installed. The installation operates as follows. On the vibrating core 3, a housing of a profitable extension 10 is installed. By supplying compressed air through nozzles 9 into the airtight shell 8, the upper U-shaped element 6 is moved vertically and lifts the housing of the profitable extension 10 to provide the clearance between concrete the surface of the vibrocord 3 and the upper shelf of the housing of the profitable extension 10. A concrete mix is introduced into the resulting gap, having turned on the pre-vibrator t (Fig. 1). After filling the cavity between the vibrating heart 3 and the body of the profitable extension 10 with concrete, without disconnecting the vibrator, air is released from the airtight shell 8. The profitable extension then lowers to the lower position under the action of its own weight and vibration (Fig. 2). Next, the vibrator k is disconnected and, after the concrete has set, the profitable extension from the vibrating core is removed. The use of the proposed installation will make it possible to manufacture a permanent lining layer with an upper horizontal surface protected from direct metal exposure and thereby increase its durability to reduce labor costs and the consumption of heat-resistant concrete 2.5-3 times, which will give a saving of 25-30 thousand rubles . per 1 million tons of cast steel. Claims An installation for lining profitable mold extensions, containing a foundation with a plate fixed to it and fixing it with a plate and a hollow vibrator core mounted on shock absorbers, in order to obtain a constant layer of lining if there is a top shelf profitable adapter in the case increase the durability of the permanent lining layer, it is additionally equipped with a device for smoothly raising and lowering the profitable extension, consisting of hollow vibrating cores installed along the perimeter and the lower U-shaped elements rigidly fixed on the support-fixing plate, above which the upper U-shaped elements are mounted with the possibility of vertical movement, and in the closed cavity formed by these elements there is an elastic airtight casing equipped with compressed air inlets. Sources of information taken into account in the examination 1.Pr Dko V.M., Zavadsky M.Ya., Gursky G.L. and others. Mechanization of lining of profitable extensions of molds with heat-resistant concrete. - Refractories. 1977, No. 7, p. 91. 2. USSR author's certificate number 251151, cl. B 22 D 7/10, 1970.  ci