Blast heating apparatus for blast furnaces
AssigneeDidier-Werke AG
InventorsFriedrich Eschmann, Gunter Gelsdorf, Peter Nold, Gotthard Staats, Gerhard Subat
Life of this patent
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Abstract
A blast heating apparatus includes an inner metal shell having therein a refractory lining. An outer metal shell surrounds at least a portion of the inner metal shell and defines therewith a double shell structure. Spacers are positioned between the outer and inner metal shells to define therebetween a gap. At least a portion of such gap is filled with a pourable dry material having a grain size of up to 8 mm and a heat conductivity of at least approximately 1.5 W/Km.
Claims10
In a blast heating apparatus, particularly for blast furnaces, of the type including an inner metal shell having therein a refractory lining, the improvement comprising:
- an outer metal shell surrounding at least a portion of said inner metal shell and defining therewith a couble shell structure;
- spacers positioned between said outer and inner metal shells and defining therebetween a gap;
- and
- at least a portion of said gap being filled with a pourable dry material having a grain size of up to 8 mm and a heat conductivity of at least approximately 1.5 W/Km, said pourable dry material comprising a dry mass consisting essentially of 80% by weight of a SiC-graphite mixture, 5% by weight MgO, and 15% by weight BaSO.sub.4.
In a blast heating apparatus, particularly for blast furnaces, of the type including an inner metal shell having therein a refractory lining, the improvement comprising:
- an outer metal shell surrounding at least a portion of said inner metal shell and defining therewith a double shell structure, said outer metal shell being formed of plural metal members joined at welded seams;
- welding strips covering inner portions of said welded seams;
- spacers positioned between said outer and inner metal shells and defining therebetween a gap;
- at least a portion of said gap being filled with a pourable dry material having a grain size of up to 8 mm and a heat conductivity of at least approximately 1.5 W/Km;
- and
- portions of said gap adjacent said welded seams being filled with an acidproof casting mass having an epoxy resin base and covering said welding strips, said casting mass comprising 11% by weight epoxy resin, 13% by weight tar with hardener, and 76% by weight granular quartz.
Dependencies are inferred from the claim text.