公开(公告)号：US4375983A

公开(公告)日：1983-03-08

申请号：US234317

申请日：1981-02-13

申请人： Juan Celada ,  Patrick W. MacKay ,  Juan F. Price-Falcon ,  Ricardo Viramontes-Brown

发明人： Juan Celada ,  Patrick W. MacKay ,  Juan F. Price-Falcon ,  Ricardo Viramontes-Brown

IPC分类号： C21B13/04 ,  C21B13/02

CPC分类号： C21B13/04 ,  Y02P10/122 ,  Y02P10/128 ,  Y02P10/136 ,  Y02P10/212

摘要： A method for the batchwise reduction of iron ore to sponge iron in a multiple unit reactor system is disclosed in which (a) separate fixed beds of iron-bearing material are simultaneously treated in at least one cooling reactor and at least two reduction reactors, (b) a reducing gas composed largely of carbon monoxide and hydrogen is used to cool the iron-bearing material in said cooling reactor and thereafter to reduce the iron-bearing material in said reduction reactors, (c) a stream of said reducing gas is caused to pass through the fixed bed of iron ore in said cooling reactor and then cooled and (d) a portion of the cooled effluent reducing gas from said cooling reactor is recycled thereto, the improvement which comprises causing the remainder of the cooling reactor effluent gas to be fed to said reduction reactors and to flow in parallel through the fixed beds of metal-bearing material in said reduction reactors, and heating the reducing gas fed to said reduction reactors before it enters said reactors in a gas superheater without combustion of said gas to a temperature of at least 900.degree. C.

摘要翻译： 公开了一种在多单元反应器系统中将铁矿石分批还原成海绵铁的方法，其中（a）在至少一个冷却反应器和至少两个还原反应器中同时处理单独的含铁材料固定床（ b）主要由一氧化碳和氢气组成的还原气体用于冷却所述冷却反应器中的含铁材料，之后还原所述还原反应器中的含铁材料，（c）引起所述还原气体流 在所述冷却反应器中通过铁矿石的固定床，然后冷却，并且（d）将来自所述冷却反应器的冷却的排出物还原气体的一部分再循环到其中，所述改进包括使剩余的冷却反应器流出气体 被供给到所述还原反应器并且通过所述还原反应器中的含金属材料的固定床平行流动，并且在所述还原反应器之前加热供给到所述还原反应器的还原气体 它在气体过热器中进入所述反应器，而不将所述气体燃烧至至少900℃的温度。

公开(公告)号：US4046556A

公开(公告)日：1977-09-06

申请号：US646379

申请日：1976-01-02

申请人： Juan Celada ,  Patrick W. MacKay

发明人： Juan Celada ,  Patrick W. MacKay

IPC分类号： C22B25/00 ,  C01B31/30 ,  C21B13/04 ,  C22B15/00 ,  C22B23/02 ,  C21B13/02

CPC分类号： C21B13/04 ,  Y02P10/136

摘要： A process for the direct gaseous reduction of iron ore to sponge iron wherein the sponge iron is cooled with a carbon-containing cooling gas by a dual temperature procedure that increases transfer of carbon from the cooling gas to the sponge iron and thereby permits the production of a product having a combination of relatively low or moderate metallization and relatively high potential metallization. Increased productivity of the direct reduction plant and of the overall integrated steel plant are achieved.