JPS58354A - Horizontal continuous casting method - Google Patents

Abstract

PURPOSE:To prevent the condensation of the moisture in waste gases on the inside surfaces of molds and to prevent the leakage of molten metal by connecting a tundish to the molds via a metallic foil. CONSTITUTION:Prior to preheating of a tundish 1, it is connected by placing a metallic foil 5 (for example, a stainless steel foil of SUS 304 or the like, an aluminum foil) between the refractories 2 of a tundish nozzle and the connecting refractories 3 on a mold 4 side, after which the tundish 1 is preheated, and the preheating is finished just prior to casting. When charging of molten metal is started after this, there are no noises by steam generation and leakage of molten metal owing to cracking of the refractories 3 at all and the temp. of the molten metal in the tundish remains high during casting. Thus, the preheating time and the time for preparation of casting are reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION In order to solve this problem, the present invention sandwiched the tundish metal foil after preheating and connected it to #l4tli to cut off the ventilation, thereby removing the moisture in the exhaust gas from the mold. To prevent inward condensation and to prevent cracks in the refractory due to the generation of steam at the initial stage of casting, to ensure a stable casting start, or to connect the tundish and the mold by sandwiching a metal foil between them.
After that, the tundish is preheated until just before casting, and the ventilation is blocked with metal foil, and the tundish is preheated until just before casting, while preventing moisture in the exhaust gas from condensing inward of the mold, to ensure the effect of preheating and stable casting work. The refractory on the outlet side of the tundish and the refractory on the inlet side of the mold are connected by sandwiching metal foil, and casting begins.
This is a casting method in a horizontal continuous casting machine, which involves preheating the tundish until the temperature reaches 100 degrees.

In the present invention, since the metal foil is sandwiched between the refractory on the outlet side of the tundish and the refractory on the inlet side of the mold, it is possible not only to block out the exhaust gas from the tundish, but also to prevent the mold and the refractory from forming. It is possible to ensure adhesion to prevent melt leakage, and the metal foil used is a metal foil that will not melt or oxidize during preheating, making it fireproof even if it melts and disappears during casting. The thickness is KO11 or less to prevent hot water from leaking between the objects, and to ensure a stable start of casting by melting easily in the early stages of casting. It is preferable to use a material having a thickness greater than or equal to the above.

Next, embodiments of the present invention will be explained based on the drawings.

In the drawing, the tanditshu nozzle (outlet side refractory) (
2) at a position remote from the T-mold (4) and the connection (inlet @) refractory (3), first pre-heat the tundish (1) with the T-mold (4) and the pre-M&- finish before starting casting, then refractory the nozzle. When the object (2) is connected to the connecting refractory (5) and the hot water is poured from the ladle into the tundish (1), water vapor will be generated and a small explosion will be made, or the connecting refractory (3) will be heated. Defects such as cracks may occur and melt leakage may occur, but in the present invention, as shown in the drawing, the front surface of the connecting refractory (3) on the mold side is covered with 0.01 mm thick aluminum foil or the like. After installing the metal foil (5) and preheating the tundish, connect the refractories (2) and (3) by sandwiching the metal foil and start Note 1. There is no leakage of hot water due to cracks in (3), and as another aspect, the connection refractory (2) is removed before preheating the tundish.
) and (6) with a metal foil of 0.8 mm thickness, e.g. 8 US.
Connect by sandwiching stainless steel foil such as 504 or aluminum foil (5), preheat it in place, finish the preheating before pouring, and then start pouring the metal. (5) There is no cracking caused by cracks at all, and the temperature of the molten metal in the tundish remains high during casting, making it possible to shorten preheating time by 50% and further shorten casting preparation time.

As explained above, according to the present invention, casting can be carried out very effectively using a horizontal casting machine.

[Brief explanation of the drawing]

The drawing is a schematic cross-sectional view of an implementation device of the present invention. In the figure (1)...Tandish nozzle (outlet side refractory), (5)...Mold inlet side refractory, (4)...Water-cooled mold, (5) ...metal foil

Claims (1)

[Claims] Casting using a horizontal continuous casting device in which the refractory on the outlet side of the tundish and the refractory on the inlet side of the mold are connected by sandwiching metal foil, and the tundish is preheated until the start of casting to reduce mold to 41%. The present invention relates to a casting method in a manufacturing device. Conventionally, in horizontal continuous casting, the tanditsu was preheated at a position away from the mold, and the preheating was completed at the start of casting, and the tanditsu was placed in the mold! However, when preheating with a tundish kerosene burner, etc., the exhaust gas contains a large amount of moisture as steam, and this exhaust gas is used for water-cooled casting. When you touch it,
The water vapor in the exhaust gas condenses as water droplets on the inner surface of the rust layer, and when molten metal is injected into the tundish in this state, the water droplets instantly turn into water vapor, resulting in a rapid volume expansion and an explosion, causing damage to the connected refractories. This may cause cracks to occur, and in severe cases, there is a risk that hot water may leak from the damaged refractory. Therefore, in general, as mentioned above, preheating is performed at a position far away from the mold, and the preheating is completed before the start of casting, and then the product is connected to the mold. However, exhaust gas remains in the tundish, which contacts the inward direction of the mold and generates water droplets; (2) If the preheating ends early, the tundish is cooled and the effect of preheating is weakened. be.