Translation of "Ofenleistung" in English

The furnace output lies between I25O and I35O t steelmaking pig iron per day.

This point in time was also used for reducing the furnace power.

Over 90% of the power generated by the stove is transferred to the system water.

The monitoring system indicates this optically or acoustically and switches the furnace off.

Quiet operation, high thermal efficiency and good insulation and favorable burner arrangement produces maximum furnace performance.

If the kiln output is reduced to 2000 t/day, the kiln burner still requires approximately 13 t/h of coal dust.

Moreover, the output of the furnace was maintained constant by continuously weighing the forehearth and automatic adjustment of the blast volume dependent on this.

This reduction of the gases conveyed in or through the kiln makes it possible to either improve the kiln efficiency at equal flow rates in the kiln and equal dimensioning or to strongly improve the flow rates at equal efficiency and kiln dimensioning, thus to reduce the gas flow rates in the kiln, or to essentially reduce the diameter of the kiln at equal efficiency and equal flow rates, which ultimately results in reduced investment costs and substantially improved life of the kiln lining.

As a result of this decrease of flame temperature, the NOx -formation is substantially reduced in the coke oven, especially when underfiring with rich gas, without impairing the oven output.

It is assumed in this case that, for a fusion procedure which is optimized in process terms, it may be necessary in the case of induction crucible furnaces with in-and-out operation for charging to be carried out even at full furnace power (the crucible is filled with further metallic feed materials), that is to say the furnace body is then in the normal position with an open cover.

For example, three minutes at an oven power of 700 watts would be possible, but the preparation time would of course vary with the amount of food in the package and the microwave power.

In this case, the process will specifically differ from a prior-art melting process in that the furnace is operated at reduced capacity and preferably with cooling of the furnace bottom, in order to minimize the height of the melt sump as much as possible.

Even if it were possible in this way to find a solution for a specific furnace size and electrode current, said solution would not necessarily be transferable to another furnace size and/or furnace power.

The amount of starting component charged in and the furnace capacity are selected to be such that the height of the melt sump (between the electrodes) does not exceed 100 mm at any point in time.

The additional power required for it is slight in comparison with the power requirements of the whole furnace, amounting to about 0.3% of the total furnace power.

The furnace operation was completely normal during the test and the output remained unchanged at about 1350 t/'d.

The isolated chimney prevents the cooling of flue gases whose temperature is within limits between 65 and 200°C (depending on the stove power).

For a proper combustion of pellets a sufficient underpressure in the chimney (10-14 Pa), depending on the stove power, is also required.

Now, therefore, it is the object of this invention to remedy the described deficiencies in an economic manner and to assure an optimized supply of primary air and/or secondary air in order to improve coke oven performance rate and, thereby, coking time, too.

Now it is possible to reliably achieve a coking time of less than 48 hours, which represents a remarkable increase in oven performance rate as compared with the state of the art in technology.

Exceeding the upper limits predetermined according to the invention of the contents of micro-alloying elements would result in retarding the recrystallisation during annealing, so that during real production this would either not be able to be achieved or would require an additional furnace output.

This better uses the heat generated in the kiln, i.e. at the same kiln output, more process heat is available for other processes.

The course of thermally activated processes is generally controlled by continuously monitoring the temperature and correspondingly adapting the furnace power.

With reference to the example of a sintering process taking place in a furnace which has been heated with constant speed, the heating power of this furnace can be reduced after the occurrence of a discontinuity of the intensity curve of the detector (16), wherein the further course of the sintering process, however, is superimposed by the discontinuity caused by the change of radiation from the heating elements due to a reduction of the furnace power, and cannot be exactly traced any longer.

The monitoring device 1, in order to protect the coil 14, lies radially within the coil windings, which causes a melt tongue running out through a crack 16 to first short-circuit the conductor sections and thereafter to turn off the furnace performance.

Each individual monitoring device can also take on different tasks so that when melt runs out, for example, in connection with a special danger to personnel, the furnace is immediately switched off; in case of a run out without an immediate danger the furnace performance is at another area continuously controlled down.