Method and apparatus with dry dust removal of exhaust gases for direct reduction

• Main Authors: EID THOMAS, MILLNER ROBERT
• Format: Patent
• Language: Chinese; English
• Published: 18.04.2023
• Subjects: BLASTING; CHEMISTRY; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FERROUS OR NON-FERROUS ALLOYS; FURNACES; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; HEATING; KILNS; LIGHTING; MANUFACTURE OF IRON OR STEEL; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; OPEN SINTERING OR LIKE APPARATUS; OVENS; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; RETORTS; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

The invention relates to a method for the direct reduction of a metal oxide-containing feedstock by contact with a thermal reduction gas in a reduction unit (1) in order to produce a metallized material, in which the directly reduced product is discharged from the reduction unit (1) by means of a product discharge device (3) which is purged with a barrier gas, the exhaust gas is withdrawn therefrom and subsequently dedusted. The exhaust gas is dry-dedusted and the content of at least one gaseous component is reduced by catalytic conversion or combustion. The invention also relates to a device for carrying out the method. 本申请涉及通过在还原单元(1)中与热还原气体接触而使含金属氧化物的原料直接还原以产生金属化材料的方法，其中直接还原的产物借助产物排出装置(3)从还原单元(1)排出，该产物排出装置用屏障气体吹扫，从此处将排出气体抽出并随后除尘。将所述排出气体干式除尘，并且通过催化转化或燃烧而使至少一种气态成分的含量减小。本申请还涉及用于进行该方法的装置。