摘要:
A method and a means for introducing close-grained carbonaceous fuels, which are suspended in a carrier gas, and oxygen into a molten iron bath are described.In this method the fuel and the oxygen can be alternately introduced through the same introduction passage of a tuyere into a molten iron bath below the surface of the bath.The means provides for alternate supply of fuel or oxygen and is regulated by means of the oxygen line pressure.
摘要:
An apparatus for measuring a preferably heterogeneous bulk stream having a rotating element borne by a shaft, said element being driven at a constant speed and radially deflecting the bulk stream acting axially upon said rotating element, thereby impressing on it a tangential velocity component, the torque dependent on the bulk stream being measured at the shaft, and having a two-step spur gear disposed in a carrier element and having four spur wheels with geometrical radii R.sub.1, R.sub.2, R.sub.3 and R.sub.4, respectively, the first spur wheel which is disposed on the shaft meshing with the second spur wheel which is disposed on the intermediate shaft and the third spur wheel which is also disposed on the intermediate shaft meshing with the fourth spur wheel disposed on a driving shaft. The intermediate shaft movably mounted in the carrier element, the direction of movement of said intermediate shaft corresponding to the direction of the reaction force acting on the intermediate shaft, is fixed in its position by a force measuring means and the idling friction torque RM.sub.A of the output shaft and the idling friction torque RM.sub.Z of the intermediate shaft satisfy, with their absolute values and the predetermined condition R.sub.3 is greater than R.sub.2, the following condition: ##EQU1##
摘要:
A method of measuring and/or regulating the mass flow of solid particles in a transported solid particle-gas suspension, the quantity of carrier gas in the solid particle-gas suspension being changed between two constrictions.
摘要:
The invention relates to a process for the operation of a regenerator, hot and cold gas being repeatedly passed through a bulk material 4 with a maximum particle diameter Dmax which is received in the annular space 1 between a substantially cylindrical hot grid 3 and a cold grid 4 surrounding the latter, and at least one discharge opening 16 being provided in the bottom B of the annular space 1 for discharging the bulk material 4. To increase the service life of the regenerator, it is proposed according to the invention that a predetermined amount of bulk material 4 is discharged during or after the passing-through of hot gas, so that a compressive stress exerted by the bulk material 4 on the hot grid 3 and cold grid 4 is reduced.
摘要:
A method is provided for heating a gas in a regenerator with a heat accumulation mass consisting of a loose bulk material arranged in a ring between two coaxial cylindrical grids, a hot collection chamber, surrounded by the inner hot grid, for the hot gases and a cold collection chamber, enclosed between the outer cold grid, on the one hand, and the wall of the regenerator, on the other hand, for the cold gases, wherein the increase in the head loss during the heating phase is at least 5 times as great as the product .rho..g.H, in which H is the height of the regenerator, .rho. is the density of the gas at a temperature of 20.degree. C. and g is the acceleration due to gravity, and the gas flow rate is at least equal to 300 m.sup.3 N/h.m.sup.2 of surface area of the hot grid at standard pressure.
摘要:
A method for two-stage melt reduction of iron ore, in which iron ore is prereduced substantially to wustite and at the same time melted down in a melting cyclone, and then liquid hot metal is produced in an iron bath reactor connected to the outlet of the melting cyclone and receiving the melted wustite by adding carbonaceous fuels and oxidizing gas to the melt. The resulting reaction gas from the melt is afterburned, and the dust-laden, partly burned reaction gases from the iron bath reactor are accelerated and further afterburned by adding a hot blast with a temperature of 800.degree. C. to 1500.degree. C., and at least a portion of such accelerated, after burned reaction gases are introduced into the melting cyclone to reduce and melt fresh iron ore.
摘要:
The invention describes a method and a means for supplying nozzles comprising concentric pipes with gaseous and/or liquid hydrocarbons in which oxygen or oxygen-containing gases are simultaneously introduced into a converter. In so doing, the gases and/or liquid hydrocarbons are conducted through collecting pipes leading into distribution chambers. They are conducted from the distribution chambers through hydrocarbon volume control devices, which are integrally arranged along with the hydrocarbon distribution devices in a rotatable device element of the rotatable control unit, on to nozzle pipes. Then, the gaseous hydrocarbons are further conducted through a safety control member arranged downstream from the hydrocarbon volume control device. Thus, the even supply of gaseous and/or liquid hydrocarbons to the nozzles is ensured at highly varying throughput rates and alternate supply, in a manner which is simple and reliable.
摘要:
The invention relates to a process for the operation of a regenerator, hot and cold gas being repeatedly passed through a bulk material 4 with a maximum particle diameter D.sub.max which is received in the annular space 1 between a substantially cylindrical hot grid 3 and a cold grid 4 [sic] surrounding the latter, and at least one discharge opening 16 being provided in the bottom B of the annular space 1 for discharging the bulk material 4. To increase the service life of the regenerator, it is proposed according to the invention that a predetermined amount of bulk material 4 is discharged during or after the passing-through of hot gas, so that a compressive stress exerted by the bulk material 4 on the hot grid 3 and cold grid 4 [sic] is reduced.
摘要:
The present invention relates to a method and a regenerator for heating gases, by alternatingly first heating heat carriers, preferably a bed of heat carrier bodies, and thereafter utilizing this energy stored by the heat carriers to heat cold gases. The essential feature of the invention is that a loose bed of the heat carriers is located between two coaxial and equidistant grates of the regenerator, and that the hot gas flows through this bed from the inside to the outside during the heating up phase of the regenerator and the cold gas flows through it in the reverse direction, from the outside to the inside, during the gas heating phase. This method and the regenerator provide advantages for gas heating due to lower thermal losses of the regenerator itself, and increased heat transmission is obtained due to large heat exchange surfaces of the heat carriers in a bed with a relatively low pressure loss for the gas flowing through.
摘要:
The valve for supplying a flow medium to a flow medium pipe which alternatingly carries different flow media, in particular to the flow medium pipe of a converter for treating the contents of a converter with various gaseous flow media, exhibits a chamber (20) between the flow medium inlet (7) and the flow medium outlet (10), which chamber may be closed on the side facing the flow medium inlet (7) by a piston (11) and on the side facing the flow medium outlet (10) by a disk (12). The piston (11), on the side turned away from the chamber (20), and the chamber (20) are optionally connectable via separate flow medium pipes (27 and 28, respectively) with the flow medium inlet (7) and the free atmosphere, respectively, to close the chamber (20) by the piston (11) and evacuate the chamber, or with the free atmosphere and the flow medium inlet (7), respectively, to open the chamber (20) by the piston (11). The disk (12) is loaded in a closed position towards the chamber (20) by a spring (13) and a differential piston (14) with a larger effective surface (14') on the side facing the flow medium outlet (10) and a smaller effective surface (14") on the opposite side (the only drawing).