RU2004891C1 - Device for cooling the housing of the funnel by watering - Google Patents

Description

The invention relates to ferrous metallurgy and foundry, more specifically, to devices for water cooling of metallurgical furnaces, for example cupolas.

The aim of the invention is to intensify cooling and eliminate burnout of sections of the casing under the tuyeres and other protruding parts.

Fig. 1 shows a general cooling circuit; Fig. 2 shows a construction of a device in three projections with cuts;

The device (see FIG. 1) for complete water cooling of the cupola cup housing consists of a water collector 1. nozzles 2 for jet water supply to the shell and the drainage box 3. Uncooled sections under the tuyeres 4 are provided with loop-shaped wire elements 5 (see FIG. 2).

The elements used are steel, copper, aluminum or other wire with a large coefficient of thermal conductivity with a diameter of 2-10 mm.

Some ends of the elements are rigidly fixed (welded or welded) in an uncooled zone, and they are mounted in this zone evenly over its area. The other ends of the elements are led into the flowing water flow zone, which is located on the sides of the dead zone, said ends being located with a gap between the casing, but immersed in a layer of water flowing down the casing. The clearance is recommended to be maintained between 0.5-1.5 mm.

The device operates as follows.

When water is supplied to the collector 1, water along the nozzles 2 is evenly distributed over the casing in the form of a film of a thickness of 2-3 mm. Water removes heat from the cupola cabinet, intensively cools it and the lining. At the bottom of the cupola, cooling water is collected in a box 3, discharged for cooling and cleaning, and is used again.

Under the tuyeres and other protruding parts of the cupola, uncooled

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The dead (dead) zones in which there is no film of cooling water, and therefore overheating of the casing, intense heat of the lining and burnout of the casing are observed in these zones. To intensify the cooling of these zones, wire elements 5 are provided.

Heat from the casing in uncooled zones is transferred by the most efficient form of heat transfer - thermal conductivity - to the wire elements. Further along the wire elements heat is transferred to the other end of the elements. Since the other ends of the elements are immersed in a layer of water flowing down the casing to the right and left of the uncooled zones, heat is then transferred to the cooler. In this way, constant heat is removed from uncooled zones. In addition, due to the presence of wire elements, the total heat transfer area of uncooled zones increases (by 50-70%) and more, and a significant part of the heat is removed from the elements, hence from uncooled zones by cooling with ambient air by convection. All this provides an intensification of cooling of dead zones, lowering the temperature of these zones to 50-70 ° C, burnout of the casing and lining in these places (3-5 times).

The invention provides the following technical and economic effect:

the possibility of burnout of the casing and lining is reduced (3-5 times), the number of accidents due to burnouts is reduced;

lining resistance in dead zones is increased, the consumption of refractory materials for lining repair in the dead zone region is reduced by 15-20%.

The complexity of lining repair is reduced by 15-20%.

The invention can be used in any metallurgical furnace to organize efficient irrigation water cooling of units. (56) Copyright certificate of the USSR No. 945610. class F 27 In 1/24, 1981.

The form / that invention DEVICE FOR IRRIGATED WATER COOLING OF THE PANEL CASE, containing a water collector, nozzles for spraying water to the casing and the drainage box, characterized in that, in order to increase the efficiency of the cooling process by ensuring uniform cooling of the sections

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the casing under the tuyeres and other protrusions, it is provided with loop-shaped wire elements evenly distributed on the indicated sections of the casing, while some ends of the wire elements are rigidly fixed to the casing, and the others are located with a gap relative to the casing and immersed in the flow of cooling water.

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