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Title: Monitoring the condition of the slag crust in blast furnaces

Studies conducted at the Krivorozhstal' combine blast furnaces have shown that fusion of the crust can be established from the change in the total content of alkali metals in the slag. After the furnaces were blown out for repairs the remaining lining and crust were inspected. It was found that the lining of the uncooled part of the stock remained in relatively good shape with the greatest amount of lining wear seen between the second row of stack coolers and bosh coolers. The composition and structure of the slag crust for different regions of the furnaces were analyzed and various physicochemical properties leading to crust formation and behavior were assessed. It was concluded that the systematic determination of the fraction of K/sub 2/O in the alkali compounds in the furnace slag will permit monitoring of the conditions of the slag crust in the furnace and, in the event of the onset of its collapse, will enable measures to be taken to stabilize the heating of the furnace.
Authors:
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Publication Date:
OSTI Identifier:
6038510
Resource Type:
Journal Article
Resource Relation:
Journal Name: Metallurgist (Engl. Transl.); (United States); Journal Volume: 31:9; Other Information: Translated from Metallurg; 31: No. 9, 14-15(Sep 1987)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BLAST FURNACES; MONITORING; LINERS; CHEMICAL ANALYSIS; SLAGS; ADHESION; CALCIUM OXIDES; CARBON; DEPOSITS; INSPECTION; IRON; POTASSIUM OXIDES; REPAIR; SAMPLING; SILICON OXIDES; SODIUM OXIDES; TEMPERATURE CONTROL; TEMPERATURE EFFECTS; THERMAL INSULATION; THICKNESS; WEAR; ALKALI METAL COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; CONTROL; DIMENSIONS; ELEMENTS; FURNACES; METALS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; POTASSIUM COMPOUNDS; SILICON COMPOUNDS; SODIUM COMPOUNDS; TRANSITION ELEMENTS 421000* -- Engineering-- Combustion Systems; 360101 -- Metals & Alloys-- Preparation & Fabrication; 400201 -- Chemical & Physicochemical Properties