UA82153C2 - Device for molding of ingot from liquid metal on vertical installation of continuous steel melting - Google Patents

Abstract

The invention relates to the branch of ferrous metallurgy, namely to the design of device for molding of ingot from liquid metal on vertical installation of continuous steel teeming, and it can be used for crystallizing the ingots of steel and nonferrous metals. A device for molding of ingot from liquid metal on vertical installation of continuous steel teeming contains four copper walls, which working surfaces are covered with material of high hardness and heat resistance, coolant passages and sensors of control of the level of liquid metal. Copper walls are made from several separate water-cooled sections assembled on the perimeter of device or on the height of its walls, and connected together by fastening, moreover in each separate section channels are made for cooling liquid in the form of steel tubes inserted into these separate sections, and in the steel tubes rounded grooves are made, in which the sensors of control of the level of liquid metal are located. The working side of separate section, which contacts with liquid metal, is covered with molybdenum or boron carbonitride. Separate sections are made with two working surfaces. The invention increases the service life of device, it reduces the consumption of copper at its production, improves molding the surface of ingot, it increases the durability of working surfaces of device and provides for determination of set level of liquid metal.

Description

Description of the invention

The invention relates to metallurgy, in particular to installations of continuous pouring of steel and can be used for crystallization of ingots of steel and non-ferrous metals.

A device for installing continuous pouring of steel is known (GA Sokolov, "Steel Production", "Metallurgy, Moscow, 1982, p. 434), which includes copper walls with drilled channels in them for cooling and double-layered walls, yaks are made of a copper sheet and a steel or cast-iron plate, which are connected to each other with bolts.

The disadvantage of the device is that when the working surface is worn, the entire wall of the device has to be thrown away.

A device for continuous steel casting is also known, which contains solid copper walls that are cooled, the working surface of which is covered with a wear-resistant metal material made of silver or chromium.

The disadvantage of the device is the unreliable protection of the working surface of the copper wall and the need to completely replace one of them or the entire device in case of local wear of the copper walls. 12 A device for continuous steel casting is known (Eduard Hermanovych "Continuous Casting", translated from German, State scientific and technical publishing house of literature on ferrous metallurgy, 1961, p. 461, taken as a prototype), designed for smelting steel or copper, which contains four separate copper walls that are cooled by water and a liquid metal level control sensor. The outer diameter of the copper walls, which are cooled by water, gradually increases from top to bottom. Lubricant, for example, graphite powder, is injected under constant pressure into the gap formed in this way between the workpiece and the device. Lubricant is supplied to the device under the lowest copper wall. The upper copper wall cannot be lubricated as the others are, because there is no gap between it and the ingot. In this regard, a colloidal graphite solution is applied to it, which prevents the workpiece from sticking to the wall.

The disadvantage of this device is the short life of the coating, the difficulty of working with lubricants that contaminate the metal being melted. Gee)

The invention is based on the task of improving the design of the device for forming ingots at continuous steel pouring plants.

The task is solved by the fact that the device for forming an ingot at continuous steel pouring installations, which contains four copper walls, the working surfaces of which are covered with a material of high hardness and heat resistance, channels for cooling liquid and a sensor for monitoring the level of liquid metal, according to the invention, are made of copper the walls are made of several separate sections that are cooled by water, collected along the perimeter of the cross-section of the device or along the height of the walls of the device and connected to each other by fasteners, and in each (7 separate sections) channels for the cooling liquid are made in the form of steel pipes poured into these separate sections, and grooves are made in the steel pipes in which liquid metal level control sensors are located. The working side surface of a separate section in contact with the liquid metal is coated with molybdenum or boron carbonitride.

Separate sections are made with two working surfaces.

The proposed design of the device will allow to increase the service life of the device for forming an ingot on continuous steel pouring installations due to separate sections that are cooled by water and have two "working surfaces, the presence of channels for cooling liquid in the form of steel pipes will allow to reduce the consumption of copper during its manufacture by 50 covering the working side surface of a separate section with molybdenum or ts boron carbonitride will improve the formation of the ingot and increase the stability of the device, and the location of liquid metal level sensors in the grooves of steel pipes between separate sections will allow maintaining the given level of liquid metal.

The essence of the proposed invention is explained by the drawings, where Fig. 1 shows a general view of the device (in plan) for forming an ingot on continuous steel pouring installations, in Fig. 2, A plan and side view of a separate water-cooled section in FIG. 4 diagram of fixing individual sections in the wall of the device. The device for forming an ingot at continuous steel pouring installations contains four copper walls 1 (Fig. 1), which are connected to each other by fasteners 2, C (Fig. 1) in the upper and lower bases and form a melting space 4 (Fig. 1). To increase the service life of the claimed device, each copper wall sl 20 is assembled from separate sections 13 (Fig. 4) in which holes 9 (Fig. 2, 3) are made for fastening individual sections 13 (Fig. 4) to each other with bolts 12 (Fig. 4). And in separate sections 13 (Fig. 4) for the cooling liquid, channels b (Fig. 2) are made in the form of steel pipes 7 (Fig. 2, 3), which are poured into separate sections 13 (Fig. 4). For the contact of the coolant with part 5 (fig. 2) of a separate section 13 (fig. 4) in the steel pipes 7 (fig. 2, 3) grooves 8 (fig. 2) are made. Rounded grooves 10 (fig. 3) are made between separate sections 13 (fig. 4) 29 for fastening the liquid metal level control sensors. The working side surfaces of individual sections 13 (Fig. 4), which are in contact with liquid metal, are covered with molybdenum or boron carbonitride 11 (Fig. 2). Studies have shown that - in a device with one-piece copper walls, the surface of the ingot sinks to 2 mm, and in a device that claims that the surface of the ingot is smooth and without defects; - a device with one-piece copper walls after three melts has a wear of up to 2095, and a device that claims 60 has a wear of Zoo; - copper consumption in a device with solid copper walls is 3095 more than in a device with dialed individual sections; - coating the walls of the device with lubricant, such as graphite powder, contaminates the ingot that is being melted, and coating the side surface of a separate section with molybdenum or boron carbonitride will improve the formation of the ingot and increase the stability of the device itself, which is claimed. The device for forming the ingot on the installations of continuous pouring of steel works as follows.

Molten metal is poured into the melting space 4 (Fig. 1), which is formed into an ingot and drawn out as it crystallizes. Each copper wall 1 (Fig. 1) is assembled from separate sections 13 (Fig. 4), which are cooled by water passing through channels 6 (Fig. 2), made in the form of steel pipes 7 (Fig. 2, 3), and through the grooves 8 (Fig. 2) in the steel pipes 7 (Fig. 2, 3) contacts the copper part 5 (Fig. 2) of a separate section 13 (Fig. 4), thereby cooling it and cooling the outer surface of the ingot. When wearing the working surface of a separate section 13 (Fig. 4), it turns to 1802, due to the fact that it has two working surfaces. then

Claims (1)

Formulation of the invention Device for forming an ingot from liquid metal on a vertical installation of continuous pouring of steel, which contains four copper walls (1), the working surfaces of which are covered with a material of high hardness and heat resistance, channels (6) for coolant and sensors for monitoring the level of liquid metal, which differs in that the copper walls (1) are made of several separate sections (13) that are cooled by water, collected along the perimeter of the cross-section of the device or along the height of its walls and connected to each other by fasteners (2, 3), and in each separate sections (13) have channels (6) for coolant in the form of steel pipes (7) with grooves (8) poured into separate sections (13), and these sections (13) also have rounded grooves (10) in which liquid metal level control sensors are located, the working side surface of individual sections, which is in contact with liquid metal, is coated with molybdenum or boron carbonitride (11), and each individual section (13) is made with two working surfaces. c 7 o (ze) Io) "-- c Zo (ge) - with . and? so ko - 1 Se ko 60 b5