摘要:
According to the inventive method for producing hot metal, feed materials made up of iron ore, preferably in lump and/or pellet form, and optionally, flux materials, preferably lime and/or dolomite are reduced to sponge iron in a reduction area. The resulting sponge iron is then melted down into hot metal in a melt-down gasification area with solid carbon supports and oxygen-containing gases being added and a reduction gas and slag being formed. Said reduction gas is at least partially introduced into the reduction area, reacted there and drawn off as top gas. The invention also relates to an installation for carrying out this method.
摘要:
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Einblasen von festen Teilchen in einen Schachtofen, insbesondere einen Hochofen, bei dem die festen Teilchen mittels eines gasförmigen Förderstromes in den Heißwindstrom der Windformen zugeführt werden. Verfahrensgemäß wird der gasförmige Förderstrom mit den festen Teilchen unmittelbar vor Eintritt in eine Einblaslanze mit einem gasförmigen Medium beaufschlagt, dessen Druck an dieser Stelle über dem Druck des Förderstromes liegt und das so in den Förderstrom eingeleitet wird, daß unter Erhöhung der Fließgeschwindigkeit die im Förderstrom eingelagerten festen Teilchen verwirbelt und in eine, in Richtung des Lanzenaustritts gerichtete, spiralförmige Bewegung versetzt werden. Die dazugehörende Vorrichtung ist in Fig. 4 dargestellt und besteht aus einem der Einblaslanze 6 vorgeordneten Rohrabschnitt 1, der mindestens zwei gegenüberliegende und zueinander versetzt angeordnete Rohreinmündungen aufweist, die über einen Rohrbogen 2 miteinander verbunden sind und der an einem Anschluß 3 für ein gasförmiges Medium befestigt ist.
摘要:
In a process for continuously conveying a finely-divided or dust-like solid by means of a conveyor to two or more targer points (A to D), the solid is inserted into a distribution vessel (7) and conveyed therefrom by means of the conveyor medium via supply lines (12) to target points (A to D) in the desired target-quantity/unit time. In order easily to set the target-quantity/unit time for a target point (A to D) individually with an uncomplicated design and highly reliably, the target-quantity/unit time intended for a target point (A to D) is divided into two or more partial target-quantities/unit time and one partial target quantity/unit time is taken off from the distribution vessel (7) by means of the conveyor medium via an individual partial supply line (11), the partial target-quantities/unit time are brought together at the latest at the target point (A to D) concerned and, to adjust the target-quantity/unit time of a target point (A to D) at a certain level, partial supply lines (11) leading to said target point (A to D) are blocked or held open.
摘要:
A method for providing a blast stream into a blast furnace wherein fuel and hot oxygen are provided into the blast air, the hot oxygen being at a temperature and velocity each greater than that of the blast air, and wherein the fuel and hot oxygen begin to combust prior to passage into the blast furnace in the blast stream.
摘要:
A method and a solid fuel product, such as briquettes and pellets, comprising carbon fines, in the form of heretofore discardable coke breeze and/or coal fines and/or revert materials, bound together chemically into smaller pieces to substantially prevent degradation and which constitutes a source of high heat without creating significant pollution or smoke.
摘要:
A solid compound having a volume average particle diameter of not more than 5 µm, for example, silicon dioxide, aluminum oxide, calcium carbonate, or silicon cabide, is adhered on a dried fine coal obtained from a raw coal having an average HGI of not less than 30 in such a manner that the value of α falls within the following range to improve the transportability of the fine coal: k 1 · r 0.59 ≦ α ≦ 10 (vol %) wherein k 1 = 10 -1.42 and r represents the volume average particle diameter (µm) of the solid compound added. As a result, the fine coal is improved in fluidity and thus can be used as an injection fuel for blast furnaces and a fine coal firing boilers. Further, it is possible to prevent hanging and changing within hoppers and clogging of piping.
摘要:
A burner/injector (200) and method for providing a localized impingement flame or multiple flames for scrap heating and melting through use of a fluid fuel and at least one oxygen rich oxidizing gas. The burner/injector (200) includes a liquid-cooled combustor for generating an impinging flame directed toward a scrap pile and a structure for injecting a controllable amount of solid carbonaceous fuel (204) and a controllable flow of high velocity oxidizing gas (232) into space that has been previously occupied by the impinging flame.
摘要:
An apparatus for performing a metallurgical process comprises a main reactor (4) for performing reactions that convert carbonaceous material to a reducing gas and for melting metal, the main reactor (4) having a least one inlet (20 or 22 or 24) for the introduction of pure oxygen or oxygen-enriched air into the main reactor (4) to take part in one or more reactions ; a secondary reactor (2) separate from said main reactor for partially oxidising particulate coal to form a particulate char and a calorific gas, the second reactor (2) having an inlet (6) for said coal and an inlet (8) for oxidising gas ; and means for introducing at elevated temperature at least part of the char but none or only some of the calorific gas into the main reactor (4) so as to provide a part or all of said carbonaceous material.