Method and installation for utilizing waste products, which contain hydrocarbons and iron oxide, particularly mill scale sludges and coal fines

Abstract

The invention relates to an apparatus and a method for utilizing hydrocarbon-containing and iron-oxide-containing waste products, in particular rolling scale sludges, and fine coals, in a metallurgical plant, in which the waste product is mixed with the fine coal, and if appropriate with bituminous substances, and is then agglomerated, in particular cold-briquetted, and is then used to build up the fixed bed in a melter gasifier and is converted in the latter in a melting-gasification zone.

1 . A method for utilizing hydrocarbon-containing and iron-oxide-containing waste products, in particular rolling scale sludges, and fine coals, preferably in a metallurgical plant, particularly preferably for producing pig iron and/or primary steel products, in which the waste product is mixed with the fine coal, and mixed with bituminous substances, and is then agglomerated, in particular cold-briquetted, and is then used to build up a fixed bed in a melter gasifier and is converted in the latter in a melting-gasification zone.  
     
     
         2 . The method as claimed in  claim 1 , characterized in that the waste product has a hydrocarbon content of greater than 0.1% by weight, in particular of greater than 0.2% by weight.  
     
     
         3 . The method as claimed in  claim 1  or  2 , characterized in that the waste product is broken down into a carbon-containing fraction and an iron-oxide-containing fraction in the melting-gasification zone, the carbon-containing fraction being converted substantially into CO and H 2  and the iron-containing fraction being reduced and melted down.  
     
     
         4 . The method as claimed in one or more of  claims 1  to  3 , characterized in that the fine coal and/or the waste product is/are mixed with metallurgical dusts during the agglomeration and/or prior to the agglomeration.  
     
     
         5 . The method as claimed in one or more of claims  1  or  4 , characterized in that the waste product is dewatered to less than 10% by weight of residual moisture, preferably by means of a filter press and/or centrifuge, prior to the agglomeration.