Thermodynamics for arsenic and antimony in copper matte converting; Computer simulation
- Inland Steel Co., Research Labs., East Chicago, IN (US)
- Centre de Recherches Minerales, 2700 Einstein, Ste-Foy, PQ (CA)
In this paper thermodynamic data for arsenic and antimony and their sulfide and oxide gases have been critically reviewed and compiled. The entropy values for AsS(g), SbS(g), and BiS(g) have been recalculated based on a statistical thermodynamic method. The standard heat of formation and entropy of As/sub 2/O/sub 3/(g) have been newly assessed. Copper matte converting has been mathematically described using the stepwise equilibrium simulation technique together with quadratic approximations of oxygen and magnetite solubilities in molten mattes. A differential equation for the volatilization of arsenic and antimony has been solved for successive reaction microsteps whereby the volatilization, slagging, and alloying of the minor elements have been examined as functions of reaction time and other process variables. Only the first (slag-making) stage of converting is responsible for the elimination of arsenic and antimony by volatilization. Arsenic volatilizes mainly as AsS(g) and AsO(g), with As/sub 2/(g) also contributing when initial mattes are unusually rich in arsenic (above 0.5 pct arsenic). Antimony volatilizes chiefly as SbS(g), and the contributions of other gases such as SbO(g) and Sb(g) remain negligibly low. The results of the simulation compare favorably with industrial operating data.
- OSTI ID:
- 5208283
- Journal Information:
- Metallurgical Transactions, (Section) B: Process Metallurgy; (USA), Vol. 19B; ISSN 0360-2141
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
ANTIMONY
THERMODYNAMICS
ARSENIC
CALCULATION METHODS
CHEMICAL REACTIONS
COMPUTERIZED SIMULATION
COPPER
DIFFERENTIAL EQUATIONS
ENTROPY
EVAPORATION
GASES
MAGNETITE
OXIDES
SOLUBILITY
SULFIDES
CHALCOGENIDES
ELEMENTS
EQUATIONS
FLUIDS
IRON COMPOUNDS
IRON ORES
IRON OXIDES
METALS
MINERALS
ORES
OXIDE MINERALS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SEMIMETALS
SIMULATION
SULFUR COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties
360204 - Ceramics
Cermets
& Refractories- Physical Properties