SU773417A1 - Trough for discharging metal from melting unit - Google Patents

Description

The invention relates to ferrous metallurgy, in particular, to devices for the production of metal from smelters.

Known chute containing single-circuit casing. In the manufacture of refractory lining, drying is carried out from the outside through the casing of the gutter 1.

However, drying is uneven, therefore the quality of the lining deteriorates, and trash appears in it. From heating, the gutter casing is deformed, its service life is reduced. In addition, the construction of a single-circuit gutter is not sufficiently rigid.

Closest to the proposed technical essence and the achieved result is a chute for the production of pig iron, containing a casing lined with refractory material, and nozzles for supplying and discharging the heat transfer fluid, which are located between the casing and the refractory lining 2.

The disadvantages of the known trough are the possibility of an emergency situation when the lining is burned up, since the molten metal contacts the cooling medium; in low maintainability due to the fact that when breaking the spent lining, the cooling tubes are damaged; in reducing the service life, as the laying of pipes in the groove reduces the thickness of the lining.

The purpose of the invention is to increase operational reliability and facilitate repair.

This goal is achieved by the fact that the chute is provided with an additional casing, and the casing lined with refractory material is perforated and installed in the additional casing rotatable relative to the axis of the hinge, through which one casing is connected to another, while the pipes for supplying and discharging the heat carrier are fixed on additional casing and their cavities are in communication with the cavity between the covers.

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FIG. 1 schematically shows the proposed trough; in fig. 2 is a section A-A in FIG. one.

Claims (2)

The chute consists of an inner casing 1, lined with refractory, an additional outer casing 2, hinges 3, wedge connections 4, nozzles 5. The inner casing 1, lined with refractories, is perforated and has a certain number of holes of small diameter (about 10 mm), and also has grippers 6 and longitudinal ribs 7. It houses the lining 8. The inside of the additional outer casing 2 is covered with thermal insulation material 9. The spent lining is removed using the duct 10. The inner casing 1 is mounted coaxially in the outer casing 2 with a gap between them, joining them with the help of hinges 3 from one side of the trench and wedge connections 4 from the other. Assembling between the shells, a closed cavity is formed, to which the nozzles 5 are connected, which serve to connect the coolant supply system. The grippers 6 are intended to provide for turning the inner casing I relative to the casing 2 when cleaning the spent lining. The longitudinal ribs 7 provide the rigidity of the casing 1, the increase in the heating surface and the direction of flow of the coolant along the casing when drying the lining. In order to avoid energy losses during the interaction of the heat transfer medium with the additional casing 2, the inner part of the latter is covered with heat insulating material 9. After molding the lining 8 in the inner casing 1, the heat transfer system is connected to the nozzles 5 and the liner is inserted. When the coolant is purged along the longitudinal ribs 7 of the perforated casing 1 in the lining 8, a vacuum is created, which facilitates removal with the steam coolant, which shortens the drying time and improves the quality of the lining. At the end of the drain, the coolant supply systems are shut off, and during the operation of the chute it is possible to use coolant as a cooling medium. When repairing the gutter, wedge joints 4 are disconnected and with the help of grippers 6 and the internal lifting device, the lined casing 1 is turned against the balls 3 of the outer additional casing 2, lowered onto the duct 10, as a result of which the spent lining falls out of the casing. Having returned the cleaned casing 1 to the initial position, fasten it with the casing 2 with wedge joints 4. The chute is ready for making a new lining. The cycle is repeated. The proposed trough allows a high-quality material to be realized, which increases the service life of the lining, has a higher operational reliability due to its rigid construction, and increased maintainability by eliminating the operation of breaking the spent lining. The invention The chute for discharging metal from the smelting unit, comprising a casing lined with refractory material, and nozzles for supplying and discharging the coolant, characterized in that, in order to increase reliability and ease of repair, it is equipped with an additional casing, and the casing lined with refractory material made perforated and installed in the additional casing with the possibility of rotation relative to the axis of the hinge, by means of which one casing is connected with the other, while the pipes for supplying and discharging the coolant are fixed s on the additional casing and their cavities communicate with the cavity between the covers. Sources of information taken into account in the examination 1. N. Miroshnichenko. Preparation of the chute and ladle in the open-hearth shop. M., Metallurgizdat, 1963. 2. Authors certificate of USSR L 392093, cl. From 21 to 7/14, 1973. YES / t W