SU1476277A1 - Reverberatory furnace for melting scrap and non-ferrouse metal waste - Google Patents

Abstract

The invention relates to metallurgy and can be used in enterprises of secondary non-ferrous metallurgy. The purpose of the invention is fuel economy. In the proposed reflective furnace for melting scrap and non-ferrous metal waste containing a melting chamber with burners, a metal collector with burners connected to the melting chamber through a flow-through channel and a gas path limited from above by the pinch vertical wall and from below by the front wall of the melting chamber and a chimney located p The house with the back wall of the melting chamber and communicating with it, provides for the following differences. In the pinch vertical wall there is a visor with a triangular cross section directed towards the chimney. Lobova surface of the vertical wall is shifted in the direction of the metal reservoir. The front wall of the melting chamber is made with bevels in both directions. One of the burners of the smelting chamber is installed with the possibility of overlapping it with a torch at the mouth of the flow channel, and the vault of the metal collector is made below the vault of the smelting chamber. As a result, additional heating of the deepest part of the melting chamber bath at the mouth of the overflow channel and the metal of the metal collector in the part furthest from the flames is achieved. 2 Il.

Description

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The invention relates to metallurgy, in particular, to the construction of furnaces for the smelting of scrap and non-ferrous metal wastes, and can be used in enterprises of secondary non-ferrous metallurgy,

1 The purpose of the invention is to save fuel.

FIG. 1 shows a sketch of the proposed furnace; in fig. 2 shows section A-A in FIG. one.

Reflecting furnace for smelting scrap and waste consists of a housing 1, including a metal collector 2 with burners 3, a melting chamber 4 with burners 5, interconnected by a flow channel 6 and a gas path 7, a chimney 8, a pinch vertical wall 9, a visor 10,

The body 1 is made of refractory material resistant to flue gases and metal melt. In the front part of the body 1 there is a metal container 2 with burners 3, bounded below the bottom of the bottom 11, from the sides there are side walls 12 of the body 15 above the arch 13. The burners 3 are located in the metal collector on the end wall 14 in the direction of the flue gas movement, the working windows 15 of the metal collector are located in the side wall 12 of the casing 1.

The melting chamber 4 is located behind the metal collector 2 in the housing 1 along the flue gas movement and is limited to the bottom 11, the front wall 17, the lateral side walls 12 of the housing 1, and the rear wall 18, from the top vault 19, Workers 15 of the melting chamber 4 are located in the side wall 12 and serve to maintain the working space of the chamber 4. The burners 5 of the chamber 4 are installed in parallel on the vertical wall 9 located between the arches 13 and 19 of the metal collector 2 and the melting chamber 4 and displaced to the metal drain box 2 in the direction of the flue gases at an angle to the bottom 11. One of the burners 5, located on the side of the overflow channel 5 of the melting chamber 49, is installed with the possibility of shutting it with a torch to the mouth of the overflow channel 6. The flue gases from the furnace are removed through the chimney 8.

B of the pinch vertical wall 9 there is a visor 10 of triangular cross section e directed towards the chimney 8. The front wall 17 of the melting chamber 4 is made with bevels 20 in both directions, and a double bevel is made from the side of the melting chamber 4. The angle of inclination of the upper bevel 21 is greater than the bevel 20 not less than twice,

The height of the roof 13 of the metal collector 2 is determined in connection with the absence of scrap loading and waste, which means chemical and mechanical action, the height of the front wall 17 of the melting chamber 4 and the gas path 7S and as a result of the displacement of the frontal surface of the vertical wall 9 you

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; the honeycomb of the gas path 7 is reduced while maintaining its living cross section.

Reflective furnace works as follows.

After drying, the burners 5 system of the melting chamber 4 is turned on. Heating the chamber is loaded through the working windows of the 15 layer-by-layer charge. Downloading

You continue until the bath of the melting chamber 4 is filled. The molten metal from the melting chamber 4 flows through the overflow channel 6 into the metal collector 2 with burners 3 previously turned on, the plugs of which are stylishly flowing around the bath and then through the gas path 7 enters the melting chamber 4 .

After melting, the melting chamber 4 is charged with the charge to the next melt and in the metal container 2 the liquid metal is brought to a predetermined grade and poured onto the casting conveyor or into carpets. Due to radiation from the torches in the melting chamber 4, the frontal surface of the vertical wall is displaced 9 in the direction to the metal collector 2 and the inclination of one burner 5 of the melting chamber 4 from the side of the overflow channel 6 with the possibility of its torch blocking the mouth of the overflow channel 6 and making the front wall 17 of the melting chamber 4 from a bevel and 20 at an angle not - less than opening angle of the torch, provided additional heating of the deepest part of the melting bath chamber 4 in the mouth of the overflow channel 6 and the metal in metallosbornike 2 in the most distant part from the torches.

The reduction of the vault 13 of the metal collector 2 ensures a reduction in the volume of recirculation zones in the working space of the metal container 2, which contributes to maintaining the flatness of the plume within the bath of liquid metal, which means that the heat of the burned fuel is better used and the heat loss through fences is reduced.

The presence of the visor 10 and the bevel 21 changes the direction of the flue gas flow from the metal collector 2 to the melting chamber 4, and also limits the number of added masses at the mouth of the torch. This improves the flattening and increases the speed of the torch run to the bath of the melting chamber.

Claims (1)

Claims Refractory furnace for smelting scrap and non-ferrous metal wastes containing a melting chamber with burners, a metal collector with burners connected to the melting chamber through a flow-through channel and a gas path bounded above by a pinch vertical wall and below the front wall of the melting chamber and a chimney located adjacent to the back wall of the melting chamber and communicating with it, in order to save 762776 fuel, the furnace is equipped with a visor of a triangular cross section located on the pinch vertical wall and directed towards the chimney, the front surface of the vertical wall is displaced towards the metal receiver, the front wall of the melting chamber is made 10 with bevels in both directions, one of the burners of the melting chamber is installed with the possibility of closing the torch with the mouth of the overflow channel, and the vault of the metal collector is made below 15 melting chamber. A ±  /////// TTTTT /, g 11 21 W 17 Fig-1 21  Fig-1 eleven 2