公开(公告)号：US4729786A

公开(公告)日：1988-03-08

申请号：US760943

申请日：1985-07-31

Applicant: Hermann Schneider ,  Konstantin Milionis ,  Hermann Pusch

Inventor： Hermann Schneider ,  Konstantin Milionis ,  Hermann Pusch

IPC: C21B13/00 ,  C21B13/02

CPC classification number: C21B13/02 ,  Y02P10/122 ,  Y02P10/126 ,  Y02P10/128 ,  Y02P10/136

Abstract: There is disclosed a process for the direct reduction of iron-oxide-containing materials by a gasification gas produced in a gasifier by reacting carbon with oxygen and, if desired, with steam, upon the addition of sulfur acceptors in a fluidized bed. The gasification gas is supplied to a direct reduction shaft furnace after separation of solid particles carried therewith. At least part of the top gas withdrawn from the direct reduction shaft furnace is compressed after dust scrubbing and is recycled to the gasifier. The sulfur acceptors are supplied as fine particles separated from the coal in cocurrent with, and/or counterflow to, the fluidized-bed forming gases. The top gas from the reduction shaft furnace, which has a concentration of from 15 to 30% CO.sub.2 and a temperature of from 80.degree. to 800.degree. C., is recycled laterally through the wall of the gasifier into the region of the fluidized bed, which is maintained at a temperature of at least 1,150.degree. C. The slag, which is in the molten state with the temperature prevailing in the gasifier, containing ashes and sulfur compounds and collecting under the formation of a bath, is removed via a tap in the vicinity of the bottom of the gasifier. The solid particles separated from the gasification gas are mixed with dust coal having a grain size of up to 3 mm and are recycled into the bottom region of the gasifier above the surface of the slag bath.

Abstract translation: 公开了一种通过在气化器中产生的气化气体直接还原含氧化铁材料的方法，所述气化气体在流化床中加入硫受体时，使碳与氧气反应，如果需要，通过蒸汽反应。 在分离固体颗粒后，将气化气体供给到直接还原炉。 从直接还原竖炉中排出的顶部气体的至少一部分在除尘后被压缩并被再循环到气化器。 硫受体以与流化床形成气体并流和/或逆流的方式与煤分离的细颗粒供应。 来自还原竖炉的顶部气体，其浓度为15-30％CO 2，温度为80-800℃，通过气化器壁横向回收到流化床的区域中， 其保持在至少1150℃的温度。在气化器中具有含有灰分和硫化合物并在浴形成下收集的处于熔融状态的炉渣通过水龙头去除 气化炉底部附近。 与气化气体分离的固体颗粒与颗粒尺寸高达3mm的粉煤混合，并再循环到炉渣表面上方的气化器的底部区域。

公开(公告)号：US4889323A

公开(公告)日：1989-12-26

申请号：US79673

申请日：1987-07-30

Applicant: Hermann Pusch ,  Siegfried Zeller ,  Konstantin Millionis ,  Hans Kresl

Inventor： Hermann Pusch ,  Siegfried Zeller ,  Konstantin Millionis ,  Hans Kresl

IPC: C10B27/00 ,  C10K1/32 ,  C21B5/00 ,  C21B13/00 ,  C21B13/14 ,  C21C5/28 ,  C21C5/56

CPC classification number: C10K1/32 ,  C21B13/00 ,  C21B13/14 ,  C21C5/56 ,  Y02P10/122 ,  Y02P10/128 ,  Y02P10/136 ,  Y02P10/212

Abstract: There is described a mill for the production of steel from liquid and solid charging substances. It includes a coking plant, a blast furnace plant, a converter steelworks, and a plant for the direct reduction of iron ore. The converter steelworks is charged with molten pig iron from the blast furnace and with scrap as well as with sponge iron from the direct reduction plant. The reduction gas is composed of converter offgas, top gas and blast furnace gas. In order to avoid coal deposits in the direct reduction plant and to improve the composition of the reduction gas, the coke oven gas component is subjected to fractionation by alternating pressure adsorption so as to increase its portion of hydrogen and to lower its portion of hydrocarbons.

Abstract translation: 描述了一种用于从液体和固体带电物质生产钢的研磨机。 它包括炼焦厂，高炉厂，转炉炼钢厂和直接还原铁矿石的工厂。 转炉钢铁厂从高炉和废钢以及来自直接还原厂的海绵铁装入熔融生铁。 还原气由转炉废气，顶气和高炉煤气组成。 为了避免直接还原装置中的煤沉积并且改善还原气体的组成，通过交替的压力吸附对焦炉气体组分进行分馏，以增加其部分氢并降低其部分烃。