摘要:
The present invention proposes a ceramic burner (20) for use in a combustion chamber (12) of a regenerative heat generator, such as a hot blast stove (10) of a blast furnace. The ceramic burner (20) comprises a burner feed chamber (21) with a partition wall (30) for dividing the burner feed chamber (21) into a fuel chamber (24) and an air chamber (28). The fuel chamber (24) has a fuel inlet (22) for receiving combustible fuel and a fuel outlet (32) for feeding the combustible fuel to a mixing zone (34). The air chamber (28) has an air inlet (26) for receiving combustion air and an air outlet (36) for feeding the combustion air to the mixing zone (34). According to an important aspect of the invention, the ceramic burner (20) further comprises a gastight metallic fuel container (48) arranged in the burner feed chamber (21), the fuel container (48) comprising the fuel chamber (24) therein, a wall portion of the fuel container (48) forming the partition wall (30) between the fuel chamber (24) and the air chamber (28).
摘要:
A method for heating a blast furnace stove includes combusting a fuel with a lower heating value (LHV) of 9 MJ/Nm3 or less in a combustion zone which is arranged in a combustion chamber in the stove, and causing the combustion gases to flow through and thereby heat refractory material in the stove. The fuel is combusted with an oxidant including at least 85% oxygen, and combustion gases are recirculated into the combustion zone for diluting the mixture of fuel and oxidant therein sufficiently for the combustion to be flameless.
摘要:
A method for heating a blast furnace stove by combusting in a stable, visible flame a fuel with a lower heating value (LHV) of 9 MJ/Nm 3 or less in a combustion region, arranged in a combustion chamber in the stove, and causing the combustion gases to flow through and thereby heat refractory material in the stove. The invention is characterized in that combusted with an oxidant comprising at least 85% oxygen, and combustion gases are caused to be recirculated into the combustion zone and thereby diluting the mixture of fuel and oxidant therein sufficiently for the flame not to damage the refactory material.
摘要:
A refractory furnace brick (1) (1/2) has chamfered corner faces (F3/f3) enabling the bricks to be formed into a regular grid with longitudinal rectangular bores formed both within respective bricks and defined by surrounding bricks. Preferably the shorter sidewalls of the bricks are extended slightly in the transverse direction to form ridges R/R' which interlock to strengthen the structure. In order to provide a distributed expansion flexible ceramic pads (P) may be provided between the chamfered corner faces.
摘要:
Support assembly for supporting heat regeneration checker work in a hot blast stove for a blast furnace, the assembly comprising a supporting grid for supporting the checker work, and supporting columns for supporting the supporting grid, the assembly comprising a cast iron material, the cast iron material comprising a ferritic matrix and a dispersion of graphite particles wherein the shape of the graphite particles is substantially vermicular or nodular.
摘要:
Bei einem Brenner (2) für Winderhitzer soll die Verbrennung verbessert und die Strömungsverteilung vergleichmäßigt werden. Es sind hierfür gas- bzw. luftführende Schlitzräume (9) durch dünnwandige Platten (8) eines Umlenkkastens (7) getrennt. Die einen Schlitzräume (9) des Umlenkkastens (7) sind schmalseitig (10) zum Eintritt des einen Mediums offen, wobei die Einströmrichtung in Richtung der Längserstreckung der Schlitzräume (9) liegt. Die anderen Schlitzräume (9) des Umlenkkastens (7) sind unten (11) zum Eintritt des anderen Mediums offen. Über dem Umlenkkasten (7) sind Kanäle (16) aus feuerfesten Formsteinen (20) gebildet, die die Strömung aus jedem der langgestreckten Schlitzräume (9) in mehrere kleinere Strömungsquerschnitte unterteilen. Die Kanäle (16) führen zu einer Mischzone (19) aus feuerfesten Formsteinen (20), in der sich Gas und Luft aus jeweils benachbarten Kanälen (16) mischt.
摘要:
In einer solchen Hochofenanlage, wobei der Hochofen insbesondere im Gegendruckverfahren betrieben wird, ist der Hochofen-Gicht eine Grobentstaubung (2) und eine Feinentstaubung (31 und zumindest eine Turbinenstufe (4, 5) nachgeordnet, außerdem ist eine Abzweigung für Gichtgas vorhanden. das unter Beimischung in einem oder mehreren Cowpern (6) verbrennbar ist, wobei den Cowpern mittels eines Kaltwindgebläses (7) Kaltluft zuführbar ist und der im Cowper (6) erzeugte Heißwind in die Düsenstöcke des Hochofens (1) einführbar ist. Um das Hochofengichtgas als auch die Cowpergase hinsichtlich ihres Energiegehaltes besser auszunutzen, wird vorgeschlagen, daß Gichtgas zur Beheizung der Cowper (6) zwischen der Feinentstaubung (3) und vor einer der Turbinen (4,5), d.h. vor der Entspannung, abzweigbar und im Cowper (6) unter Druck verbrennbar ist.
摘要:
Provided is a combined molten iron manufacturing apparatus. According to the present invention, it is possible to stably produce molten iron by using conventional metallurgical fuel and raw materials in a molten iron manufacturing apparatus based on the fluidized reduction furnace and the coal filling-type melter-gasifier and stably produce molten iron by using low-grade fuel and raw materials which are unsuitable for conventional metallurgy in a molten iron manufacturing apparatus based on the molten-bath type melting reduction furnace connected thereto, by combining the two molten iron manufacturing apparatuses through an additionally configured separate fluidized reduction furnace in the molten iron manufacturing apparatus based on the fluidized reduction furnace and the coal filling-type melter-gasifier and the molten iron manufacturing apparatus based on the molten-bath type melting reduction furnace.