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Behavior of alkalis in the shaft and hearth of a blast furnace

Journal Article · · Metallurgist (Engl. Transl.); (United States)
OSTI ID:6100751
; ;

A study was made of the effect of the alkali content of the charge on the smelting parameters of blast furnaces of the Krivorozhhstal' and Dnepropetrovsk combines. CaO/(Si/sub 2/O + FeO) was taken as the index of basicity. Samples of slag crust were taken during an overhaul on a blast furnace at the Dnepropetrovsk plant. The gradual reduction in the content of alkalis over the height of the hearth is described. The behavior of alkalis during blowing-in and blowing-out of the furnace was determined. Spontaneous slippage of the crust can be avoided by optimizing the slag regime. The ratio of oxides in the slag Al/sub 2/O/sub 3/:MgO was chosen. Statistical analysis was used to interpret data from trial heats and obtain the relationship between the alkali content of the slag and the value of the ratio Al/sub 2/O/sub 3/:MgO. A 6-8% increase for the MgO content of the slag was recommended as both accurate and necessary for removing alkalis from blast furnaces at plants in the Ukraine.

OSTI ID:
6100751
Journal Information:
Metallurgist (Engl. Transl.); (United States), Journal Name: Metallurgist (Engl. Transl.); (United States) Vol. 31:10; ISSN MTLUA
Country of Publication:
United States
Language:
English

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Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320302 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Materials
36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ASIA
BLAST FURNACES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
DEPOSITS
EASTERN EUROPE
EFFICIENCY
EUROPE
FURNACES
IRON COMPOUNDS
IRON OXIDES
LINERS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATHEMATICS
OPTIMIZATION
OXIDES
OXYGEN COMPOUNDS
PH VALUE
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
REMOVAL
SLAGS
STATISTICS
THERMAL EFFICIENCY
THERMAL INSULATION
TRANSITION ELEMENT COMPOUNDS
USSR