DE704605C - Single room deep furnace for the heat treatment of, for example, steel blocks - Google Patents

Description

Single-room deep furnace for the heat treatment of, for example, steel blocks The ones used so far. Deep furnaces for keeping or heating blocks, slabs and the like made of steel, metals or other materials, especially the so-called single-space Ovens have opposite pusher ovens and mechanical heating ovens, in which the heat material on cold exhaust end 'inserted and steadily or intermittently to the highest heated pulling end of the furnace is conveyed, the disadvantage that due to the large heat radiation at the high temperatures in question, the work area and the heat material at any time and have high and almost the same temperature in all places, so that deep furnaces of this Kind of high exhaust gas temperature, poor heat utilization and high fuel consumption have and because of the risk of heat cracks and cracks for cold use and especially are useless for hard heating material.-It is already a ring-shaped heating furnace with a rotatable stove and a fixed partition that supports the burner as well as a fixed one Exhaust pipe became known. With the high load on the hearth, which can amount to a hundred tons or more, however, is prepared by the rotatable bearing great structural difficulties of the stove. Since the blocks and slabs up to welding heat have to be heated, there is a risk that the resulting slag will inner and outer hearth gap glued and the operation within a short period of time Brings to a standstill.

In the case of the zone deep oven according to the invention, these shortcomings are due to this eliminates that i. the stove with a moving or circling flame of high Inlet and lower outlet temperature is heated, their local position opposite the stationary heat material changed in accordance with the progressive heating of the same is, and that 2. the heat material as well as pusher ovens and continuous ovens in each case the cold zone is inserted at the exhaust gas outlet and taken from the hot zone, , only with the difference that it is not the heat material that moves, but the heating. Furthermore, the resulting slag can, as in the case of an ordinary deep furnace, after both Pages flow freely.

In the embodiment shown in Fig. I to 4 of an annular One chamber deep furnace is i the bottom, 2 the side walls, 3 the side burners, 4 the slag holes, 5 the blocks to be heated standing on the hearth floor and 6 a rotatable furnace vault, which in known Way from individual coupled lid car consists, is mobile with wheels 7 on rails 8 and with sand or liquid cups g and corresponding Lei, sten io against the lower furnace is sealed.

i i is also a mobile end car with base 12, side walls 13 and end walls 1.1 and 15, which are the movable or migrating end walls of the furnace and the closure against the outside air and the separation of the hot zone or draw side from the cold zone or insert side.

The mobile adapter is with front wall burners 16, exhaust openings 17 and motorized cover chassis 18 for the entire mobile vault and with exhaust pipe i9 provided, which discharges the exhaust gas into the central fox 2o and the forge.

The heat material is progressively and in each case at the hot end of the furnace Removal of the lid 2 1 pulled and after removing the lid 22 on the cold The end of the oven is inserted by placing the entire cover around the length that has become free is rotated in the arrow or flame direction, causing a wandering heating and the same effect is obtained as when the heat good as in pusher and mechanical ovens Oven is continuously conveyed through the oven.

The side burners 3 arranged in the non-rotatable part of the furnace are regulated and switched on and off accordingly with the rotation of the cover and expediently with automatic control by the stop lever 23 and control cams 2.4 of the mobile cover provided.

According to the invention, the seal takes place in that on the wall points of the movable intermediate piece, an overpressure is maintained by blowing in warm combustion air by means of the side burners in the area of the intermediate piece or by blowing warm exhaust gas into the gap, which @eurch the warm exhaustor 27 taken from the exhaust pipe, compressed and through dif pipes 28 is pressed into the gap and prevents hot and unburned heating gases discharged from the hot end of the oven through the gap into the cold end of the oven and into the forge become and get lost.

The furnace according to the invention combines the advantages of pusher furnaces and mechanical continuous furnaces with those of the soaking furnaces, the defects of which he remedies, and is mainly intended for heating ingots and slabs for rolling mills.

Claims (3)

PATENT RESIDUAL: i. Single-room deep furnace for heat treatment of for example steel blocks, characterized in that it is annular is and has a displaceable in its longitudinal direction intermediate piece on which burner on one side and flues for the combustion gases on the other side are provided. 2. Soaking furnace according to claim i, characterized in that means are provided through which the heating during the adjustment of the rotatable furnace vault is regulated automatically. 3. Soot furnace according to claim i, characterized in that that on the sides of the intermediate piece facing the furnace walls, tubes are provided are, through which to prevent the immediate transfer of hot heating gases In the cold part of the furnace, air or exhaust gas is pressed into the column.