Gasification Behavior of Phosphorus during Pre-reduction Sintering of Medium-high Phosphorus Iron Ore
نویسندگان
چکیده
The effects of dephosphorization agents (SiO2, Na2CO3 and Al2O3) reduction time on phosphorus gasification during pre-reduction sintering were studied. results indicate that the rate apatite by carbothermal is 23%, adding SiO2 Al2O3 25%, optimal 36% Na2CO3. increased from 13% to 31% with 20 min 60 min. Thermodynamic analysis shows promotion effect stronger than Al2O3, thermodynamic conditions are optimized greatest extent Na2CO3, starting temperature decreased 1464°C 746°C. P C have same variation change trend, migration ito metallic iron related carburizing reaction. good heat storage sinter layer in increases for maintaining reaction promotes occurrence reaction, however part gas absorbed liquid form stable compounds,which leads decrease rate. Besides addition agent, restricting into phase key point increase efficiency process.
منابع مشابه
Reaction Behavior of Phosphorus in Coal-Based Reduction of an Oolitic Hematite Ore and Pre-Dephosphorization of Reduced Iron
Coal-based reduction followed by magnetic separation is an effective way to recover iron from high phosphorus-containing oolitic hematite ore. Given that high quantities of dephosphorization agent are needed to obtain low phosphorus reduced iron, a novel approach is proposed by the authors. Without prior phosphorus removal, the phosphorus was enriched in the reduced iron during a reduction proc...
متن کاملMicrowave dephosphorisation of high phosphorus iron ores of the Aswan region, Egypt : developing a novel process for high phosphorus iron ore utilization
There is a rapidly increasing demand for iron resources with the fast-paced development of the iron and steel industry. For this reason, the iron and steel industry is facing the risk of a raw material shortage. Deposits of high-phosphorus iron ores are widely spread worldwide, but the use of these deposits in industry is limited owing to the high phosphorus content, which affects the cost of t...
متن کاملenvironmental effects of gol-e-gohar iron ore mine on groundwater of the area
gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...
Factors Controlling High-temperature Zone Resistance to Airflow during Iron Ore Sintering
A fundamental study was carried out on the high-temperature zone flow resistance during iron ore sintering. In present work, firstly, quartz sand was used to replace iron ores to investigate the impact of temperature if bed structure has no change; then a three-layer bed structure was used to explore the primary factors controlling high-temperature zone structure for airflow. The zone where tem...
متن کاملA Rapid Method for Determination of Silica in Iron Ore and a Spectrophotometric Method for Phosphorus
DETERMINATION OF SILICA OXIDE iron ores usually are found in intimate association with sllica and phosphorus compounds. heir quantitative separation and purification sometimes present difficult problems to the chemist. Silicic acids may represent various degrees of dehydration. They are exceedingly weak, but combine with metallic oxides and form some of the most stable , oxides in nature, the s...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Isij International
سال: 2021
ISSN: ['0915-1559', '1347-5460']
DOI: https://doi.org/10.2355/isijinternational.isijint-2020-564