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...

The dephosphorization slag has a great potential as the secondary resources of manganese and phosphorus, while quite a large amount of slag is landfilled and simply reused such as cement. The objective of this study is to investigate the recovery of manganese and phosphorus by wet magnetic separation technique. The hot metal pretreatment slag (dephosphorization slag) generally contains a Ca3P2O...

Agricultural non-point pollution is the biggest source in China from 2009, treatment of agricultural surface runoff very important to mitigate eutrophication rivers and lakes because one key type pollution. In this study, farmland Chengdu Plain was treated for year (2017 ~ 2018) by combination technology new material (waste fir Hemlock sawdust as substrate) bioreactor denitrification Vertical-f...

this research was conducted to study the effect of lime based flux with the composition of cao-20%caf2-8%feo on simultaneous removal of phosphorus and sulfur from hot metal. the effects of na2o and oxygen blowing were also studied. the experiments were performed using an induction furnace and hot metal produced in isfahan steel company in the temperature range 1350-1450 ºc. the results showed t...

The structure and viscosity of the dephosphorization slag in new double converter steelmaking process with low basicity at temperature range 1573 K–1723 K are studied high-temperature laboratorial experiments. With increasing end dephosphorization, viscosities different slags decrease rapidly first, then slowly, activation energies increase. values Non-Bridging Oxygen per Silicon (NBO/Si) decre...

In the present work, effect of basicity at lower range from 0.98 to 2.13 on dephosphorization hot metal 1623 K was studied through high-temperature laboratorial experiments. With increase 2.13, P and C contents in rapidly decrease first, then gradually increase, respectively. From scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) diffraction (XRD) results, with basicit...

To investigate mass transfer of phosphorus in hot-metal dephosphorization process, it is necessary to reduce the deviation traditional models fitting accuracy. According change content during dephosphorization, a new model was established by introducing concept “dynamic relative area”. With help literature data and comparative analysis old models, rationality verified. On this basis, order reve...