Application of Wood Char in Processing Oolitic High-phosphorus Hematite for Phosphorus Removal
| Autor: | Yan-qi Qin, Huiqing Tang, Teng-fei Qi, Qingguo Xue, Zhi-lei Dong |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Briquette
Basic oxygen steelmaking Carbonization Phosphorus Metals and Alloys chemistry.chemical_element Mineralogy 02 engineering and technology Hematite 020501 mining & metallurgy Metal 0205 materials engineering chemistry Mechanics of Materials visual_art Materials Chemistry visual_art.visual_art_medium Gangue Char Nuclear chemistry |
| Zdroj: | Journal of Iron and Steel Research International. 23:109-115 |
| ISSN: | 2210-3988 1006-706X |
| Popis: | Phosphorus removal from oolitic high-phosphorus hematite using direct reduction followed by melting separation was investigated. At the direct reduction stage, highly volatile wood char was prepared by carbonizing jujube wood at 673 K for 2 h and was used as reducing agent. The results of the direct reduction tests show that at a temperature of 1373 K, a char mixing ratio of 0.8, and a reduction time of 10 — 25 min, the briquettes reached a metallization degree of 80% — 84% and a residual carbon content of 0.13 — 1.98 mass%. Phosphorus remained in the gangue as calcium phosphate after reduction. The results of the melting separation tests show that residual carbon in reduced briquette negatively affects the phosphorus content (w[p]) in hot metal. When the reduced briquettes obtained under the aforementioned conditions were used for melting separation, hot metal suitable for basic oxygen steelmaking (w[p] |
| Databáze: | OpenAIRE |
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