SU527249A1 - Mold for continuous metal casting plants - Google Patents

Description

one

The invention relates to the field of metallurgy, to the continuous casting of metals, and can be used in plants for continuous metal filling (UNRM).

A mold is known, consisting of a body and a water-cooled (wall-pipe in which the pipes are connected by a prodbno flexible metal spring, which promotes a tight fit of the pipe to the ingot.

The disadvantage of these molds is the presence of gaps, gaps or cracks on the working surface of the scum. In these gaps, slag, scale, and combustion products of lubricant get into the gaps, acting like an abrasive, break the surface of the ingot or even tear the newly formed crown of the sponge.

In addition, the presence of gaps sharply weakens the heat sink from the forming ingot, which leads to an increase in thermal stresses in the crown of the ingot and to various defects.

The aim of the invention is to increase the casting speed with a single improved

the quality of the ingot is achieved by ensuring the most complete contact of the cooled walls with the surface of the forming layer over the entire height of the mold.

For this, in the proposed mold on the non-working side of the walls, transverse grooves are made, reducing their thickness by an amount that allows for elastic bending due to the action of elastic elements. The transverse grooves are divided in height into several sections, each of which is pressed against the ingot, ensuring even contact with the latter. At the same time contacting with; the ingot surface remains smooth, without gaps or tears. The transverse grooves are closed by the diaphragms and serve as channels that unite the internal channels to circulate the coolant, with the diaphragm g1 being made with a minimum rigidity concave inside the grooves with a smooth transition at the ends until they fit snugly around the grooves. The transverse grooves are made to a different depth, which provides a different 5 {firmness of the places of bend N at installation

Only in the lower part of the mold, the elastic elements allow to obtain a uniform coverage of the forming cushion cooled by the walls.

The drawing shows the proposed mold ..

The mold consists of a rigid frame 1, walls 2 with internal channels for circulating coolant, supports 3 and 4, and elastic elements S. The cooled wall 2 has at least three sections 6, 7 and 8 separated by grooves 9 closed apertures 1O. The wall 2 in section 6 is rigidly fixed to the frame 1, in section 7 and 8 it is pressed out from the frame by elastic elements 5. Shores 3 and 4 serve to limit the movement of wall 2 in sections 7 and 8 from the force of the ferrostatic pressure from the forming ingot. During casting, the forming ingot undergoes a natural shrinkage and, gradually, its outer surface begins to move away from the cooled walls 2. 3 the crystallization structure is suspended. The movable parts 7 and 8 of the wall 2, being pressed against the ingot, constantly monitor its shrinkage, while in the cooling and forming of the ingot the mold participates along its entire length. In the transverse grooves 9, which are connected to the internal channels, are closed by the diaphragms iO, a fluid is circulated to the inflection point.

Claims (3)

1. A crystallizer for continuous casting plants containing rigid frame, walls with internal coolant channels, elastic elements to press the walls against the ingot, characterized in that, in order to ensure that the walls are pressed against the ingot by bending by the action of elastic elements, at least two transverse walls are made on the non-working side of the walls groove. 2. The crystallizer according to claim 1, about t l and - due to the fact that, for the purpose of uniform cooling of the working wall, the transverse grooves are closed by diaphragms and the cooling channels form inside the inner, 3. The crystallizer according to claim 1, ogpichayuschih those; uts that, in order to uniform coverage of the ingot cooled wall, nonef. j4Hbie grooves are made at different depths, and the elastic elements are fitted, only in the lower part of the crystal. lysator.