Viscosities and activities in lead-smelting slags
| Autor: | Thomas P. Battle, John P. Hager |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Activity coefficient
Chemistry Metals and Alloys Analytical chemistry Viscometer Mineralogy Slag Liquidus Atmospheric temperature range Condensed Matter Physics Viscosity Mechanics of Materials Ground granulated blast-furnace slag visual_art Materials Chemistry visual_art.visual_art_medium Lead oxide |
| Zdroj: | Metallurgical Transactions B. 21:501-510 |
| ISSN: | 2379-0229 0360-2141 |
| DOI: | 10.1007/bf02667862 |
| Popis: | Viscosity measurements at high temperature were made using a concentric cylinder viscometer. These measurements were conducted on a typical lead blast furnace slag, and this master slag doped with various amounts of SiO2, A12O3, CaO, MgO, and/or ZnO. It was found that additions of A12O2 and/or SiO2 increased the viscosity of the master slag over the entire temperature range of interest (1150 °C to 1350 °C). Additions of the basic oxides CaO, MgO, and/or ZnO decreased the viscosity at high temperatures but raised the slag liquidus temperature. The majority of the measured viscosities are accurate within ± 10 pct. The viscosity data of this study, along with that of several similar studies from the literature, were correlated with the weight parameter (WP), a composition-dependent function similar to a basicity ratio. Analytical expressions were developed relating viscosity and the WP at several temperatures between 1150 °C and 1350 °C. Viscosities calculated using these expressions have estimated accuracies of ±1 poise (within certain temperature and composition limits). PbO and ZnO activity coefficient data from the literature were collected and correlated with composition-dependent functions. The calculated activity coefficients are considered accurate within ±0.3 for γpbo and ±0.5 for γzn within certain composition and temperature limits. |
| Databáze: | OpenAIRE |
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