Fundamental experiments were conducted with the aim of crude separation of the phosphorus contained in high-P iron ore prior to the ironmaking process. By reducing high-P iron ore with lime and graphite at an appropriate blending ratio and temperature, a reduction product was obtained consisting of a P-concentrated phase, metallic Fe with low P ...
This paper presents the predictability of phosphorus removal based on simultaneously removed sulphur and mass-input of iron ore leached in potassium hydroxide. The reaction vessel containing the solution and ore was heated at a …
The current study was focused on the removal of sulfur from iron ore concentrate using chemical leaching technique. Magnetite iron ore concentrate was chosen for this purpose. The results obtained ...
be in the range of 1.2 to 4.0 moles aluminum or iron per mole of phosphorus. The pH value is an important factor for efficient removal of phosphorus using alum or other salts, as the solubility of their precipitates vary with pH. Phosphorus removal is most efficient in the pH range of 5 to 7 for alum and of 6.5 to 7.5 for ferric salts since their
Phosphorus removal from reject water could be an effective way to decrease phosphorus loads entering the aeration tank. An innovative approach involves the replacement of iron salts, which are commonly used for phosphorus removal, with ferrous ions produced by iron‐reducing bacteria from iron ore.
removing phosphorus from molten iron exist,2) a number of factors such as financial penalties and market access make it attractive to ensure that phosphorus is removed from the iron ore prior to its use in smelting. Market specifications for phosphorus in iron ore exported from Australia are typically 0.075% P. 3) The bulk of produc-
The final chemical composition of iron concentrate with magnetic separation was also examined. The present study aims at providing a basis on upgrading iron and removing phosphorus for the commercial utilization of such ooliticiron ores. 2. e xperimental 2.1 Materials and reagents The sedimentary high phosphorus oolitic iron ore
REMOVAL OF SULFUR AND PHOSPHOROUS FROM IRON ORE CONCENTRATE BY LEACHING Hassan REZVANI POUR*, Ali MOSTAFAVI *, Tayebeh SHAMS PUR, Ghobad EBADI POUR**, Amir HAJI ZADEH OMRAN ** * Department of Chemistry, Shahid Bahonar University of Kerman, Pajoohesh Sq., Kerman 76169-14111, Iran, [email protected] ** …
Phosphorus can be removed via the formation of an insoluble compound containing phosphate and iron, such as FePO 4; however, it was necessary to determine the conditions under which phosphorus can be effectively and stably removed in actual SWTPs. According to previous studies using iron compounds, improved phosphorus removal was obtained by Ca ...
Li et al. reported the effect of sodium sulfate on reduction roasting and P removal from high-phosphorus oolitic hematite ore.The results showed that a magnetic concentrate with total iron grade of 92.7% and phosphorus content of …
4.3 Phosphorus Removal Data for Iron Addition Operating data from several plants utilizing mineral addition before the prynary clarifier for phosphorus removal are shown in Table 4-1. With primary treatment alone, phosphorus removals varied from 60 to 91%. In secondary plants, iron addition before the primary resulted in phosphorus removals ...
Controlling phosphorous discharged from municipal and industrial wastewater treatment plants is a key factor in preventing eutrophication of surface waters. Phosphorous is one of the major nutrients contributing in the increased …
Comparative assessment of phosphorus removal from Nigeria's agbaja iron ore using potassium chlorate and sodium hydroxide. American Journal of Research Communication, 2013, 1(8): 43-52}, ISSN: 2325-4076. INTRODUCTION . The need for a drastic reduction in the concentrations of phosphorus present in iron ore as a way of
The results show that phosphorus occurring as apatite phase could be removed by alkali-leaching, but those occurring in the iron phase could not. Sulfuric acid is the most effective among the three kinds of acid. 91.61% phosphorus removal was attained with 1% sulfuric acid after leaching for 20 min at room temperature.
Long-term phosphorus removal from SWTPs was investigated and optimum operational conditions for phosphorus removal by iron electrolysis were analyzed in this study. Efficient phosphorus removal can be achieved for a long time by adjusting the amount of iron against the actual population equivalent.
Phosphorus Removal of High Phosphorus Iron Ore byGasBased - phosphorus removal from iron ore,Abstract A large deposit of high phosphorus iron ore in China contains an average of 12 phosphorus and 50 iron and it has not been utilized In current workAmenability for processing of oolitic iron ore concentrate for Amenability for processing of ...
phosphorus from Agbaja (Nigeria) iron oxide ore. The results of this work [7] show that phosphorus removal efficiencies at the end of the 49 days of the leaching process are 81, 63 and 68% for 5, 100 and 250 mesh grain sizes respectively. R. The aim of this work is to carry out a factorial analysis of phosphorus removed during
high-phosphorus oolitic hematite ore. The results showed that a magnetic concentrate with total iron grade of 92.7% and phosphorus content of 0.09% was produced from an oolitic hematite ore containing 48.96% iron and 1.61% phosphorus, where reduction of the iron ore blended with excessive
Removal of phosphorus from certain iron ores has proven difficult, especially when phosphorus phases are associated with the iron phases in a …
Iron-II-chloride and aluminium-III-chloride were evaluated for phosphorus removal. An efficiency difference of the coagulants was not found. β-value was mainly driven by sRP effluent and influent concentrations. sRP effluent concentrations of ≪50 μg/L were observed for cloth-filtration and membrane filtration.
phosphorus removal efficiency. There were essentially two types of iron phosphate precipitates, ferrous phosphate (vivianite) and, ferric phosphate. The former compound was white-blue in color with a log Ksp value of –31.6, while the latter precipitate was tan-light brown with a log Ksp value of –26.6. The precipitation rate data was indicative
Amenability for processing of oolitic iron ore concentrate for phosphorus removal. Phosphorus from goethite oolitic concentrate was decreased from 0.71% to 0.05%. SEM/EDS images show migration of phosphorus into Si–Na–Al–Ca cementing phases.
• Iron and aluminum can react with humic substances . Kinetics and Mixing of Phosphorus / Alum Reaction Szabó et al. (2006) The Importance Of Slow Kinetic Reactions In Simultaneous ... • Chemical reactions for phosphorus removal with ferric or alum is a primarily a surface complexation reaction • Good mixing and contact time is needed to
Jun 18, 2021· Continued increases in sulfuric acid use to 200 kg/t reduced the phosphorus content of the iron ore concentrate to less than 0.1%.However, the excess of Sulfuric acid also caused a large loss of iron in the dephosphorization reaction, with the grade of iron ore concentrate dropping to 61.46% and the iron recovery rate only 91.13%.