公开(公告)号：US4025604A

公开(公告)日：1977-05-24

申请号：US533154

申请日：1974-12-16

申请人： Sanseki Moriguchi ,  Hiroshi Abe ,  Taisuke Nishida ,  Jyoichi Takenaka ,  Makoto Miyazawa ,  Sadayoshi Iwabuchi

发明人： Sanseki Moriguchi ,  Hiroshi Abe ,  Taisuke Nishida ,  Jyoichi Takenaka ,  Makoto Miyazawa ,  Sadayoshi Iwabuchi

IPC分类号： B01D53/94 ,  B01D53/86 ,  B01J23/74 ,  B01J23/745 ,  B01J23/889 ,  B01D53/34

CPC分类号： B01J23/8892 ,  B01D53/8628

摘要： Powder and/or fine particles containing mainly oxides of iron or ferroalloys, which are used or generated in ironworks, steelworks, etc. are sieved to a grain size range between about 32 mesh and about 10mm and used as reduction catalyzer. A reactor is filled with said reduction catalyzer. Exhaust gas containing nitrogen oxides and with added ammonia is passed in contact with said reduction catalyzer through said reactor, while heating said reduction catalyzer to a temperature between about 300.degree. C and about 370.degree. C, whereby nitrogen oxides are removed from said exhaust gas by reduction. Said reduction catalyzer can be used as material for ironmaking, without requiring any further treatment, after use as catalyzer.

摘要翻译： 主要在铁厂，钢铁厂等中使用或生产的铁或铁合金氧化物的粉末和/或细颗粒被筛分至约32目至约10mm之间的晶粒尺寸范围并用作还原催化剂。 反应器装有所述还原催化剂。 含有氮氧化物和加入的氨的废气通过所述反应器与所述还原催化剂接触，同时将所述还原催化剂加热到约300℃至约370℃之间的温度，由此氮氧化物通过 减少。 所述还原催化剂可用作炼铁的材料，而不需要任何进一步的处理，作为催化剂使用。