VERFAHREN UND VORRICHTUNG ZUR REDUKTION OXIDISCHER EISENTRÄGER MIT REDUKTIONSGAS AUS EINEM KOHLEVERGASER

• Main Authors: HECKMANN HADO DR, WURM JOHANN, BOEHM CHRISTIAN, MILLNER ROBERT
• Format: Patent
• Language: German
• Published: 15.07.2011
• Subjects: CARBURETTING AIR OR OTHER GASES; CHEMISTRY; FUELS; LUBRICANTS; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROMSOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zur Reduktion oxidischer Eisenträger mit Reduktionsgas aus einem Kohlevergaser (1), bei dem oxidische Eisenträger in zumindest einer Reduktionszone von einem Reduktionsgas reduziert werden, wobei ein durch Kohlevergasung hergestelltes Rohgas einer Trockenentstaubung (4) und einer Trocken-Gasentschwefelung (5) unterzogen wird, und das dabei erhalten entschwefelte Produkt als Reduktionsgas zur Reduktion der oxidischen Eisenträger in einer ersten Reduktionszone (6) eingesetzt wird. The invention relates to a method for the reduction of oxidic iron carriers, according to which said carriers are reduced using a reducing gas in at least one reduction zone. A crude gas that is obtained by coal gasification is subjected to a dust removal process and the resultant product is used as a first reduction gas for the reduction of the oxidic iron carriers in a first reduction zone. According to the invention, a first portion of oxidic iron carriers is introduced into the first reduction zone and reduced and the first reduction product thus obtained is removed from the first reduction zone. A second portion of oxidic iron carriers is introduced into a second reduction zone and is reduced and the second reduction product thus obtained is removed from the second reduction zone. At least part of the first reduction waste gas that exits the first reduction zone is subjected to CO2 removal after a dust removal process and the product thus obtained that is devoid of CO2 is fed to the second reduction zone as a second reduction gas, optionally after being heated.