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This study focuses on the reduction of phosphorus from high phosphorus content oolitic iron ore via coal based reduction The distribution behavior of phosphorus the phosphorus content and the phosphorus distribution ratio in the metal slag and gas phases during reduction was investigated in detail Experimental results showed that the distribution behavior of phosphorus
·1 Introduction It is estimated that there are around billion tonnes of under developed medium level phosphorus containing iron ore wt% P and billion tonnes of high level phosphorus ore > wt% P in Western Australia Fisher White et al 2012 The bulk of production is typically a blend of low phosphorus martite hematite ore and medium
·However the iron ore from Kashenyi hill has lower iron content about 6l% Fe and higher gangue content 5% SiO 2 and 6% Al 2 O 3 at low concentration of the deleterious elements % P and % S According to commercial standards for crude iron ores this ore can be defined as medium grade ore
At Okene Kogi State only 250 million tons of low grade iron ore 35%Fe cf 65%Fe in Guinea & Brazil have been proven at Itakpe and Ajabonoko deposits whereas only 500 million tons are indicated at Agbaja Kogi mine ironstones considered of very poor quality because of deleterious admixtures of phosphorus and alumina which are very
The comparison of phosphorus contents present in iron slags and artifacts can be used to determine if there is a relationship between the two and therefore may help in assigning provenance to the artifacts The historical background to the discovery of phosphorus and its influence on the metallic iron made from phosphorus bearing iron ores is discussed and some
With the rapid consumption of iron ore around the world the iron ore deposits have been exhibited an increasingly complex mineralogical composition It is predicted that the identified premium grade iron ore with low phosphorus content under wt% will be depleted within 30 years at the current rate of 2 Especially in China as the
·This study assessed the environmental and socio economic impacts of iron ore exploration activities in Uganda specifically focusing on iron ore mines in Muko Sub County Rubanda District The research has three specific objectives First it seeks to identify the various iron ore exploration activities being carried out in the study area
·grade iron ore resources in the ironmaking indus try efficient utilization of low grade iron ores and iron bearing wastes has become an urgent Among these iron bearing resources high phospho rus oolitic iron ore has drawn much attention from researchers worldwide as a result of its high iron content and abundant reserves of the
·High phosphorus iron ore is abundant in the United States Canada France Egypt Australia and China However it is not widely used due to the high impurity content Baioumy et al 2017 Schwid et al 2020 Donskoi et al 2022 With the depletion of high grade iron ores efficient utilization of low grade iron ores is of great strategic significance to ensure
·and mineralogy of Muko iron ore and compared with other exploited and exported iron ores in the world Table 1 shows the results of the total chemical analysis of Muko iron ore in weight percentages The most important elements and components of consideration in iron ores are the content of Fe gangue SiO 2 and Al 2O 3 and contami nations
·Unlike previous dephosphorization studies the present work complies with a concept to recover phosphorus within the utilization of high phosphorus oolitic iron ores to prepare Fe P alloy for high phosphorus steel production Simultaneous enrichment of iron and phosphorus can be achieved by directly alloying the high phosphorus oolitic iron ore at high reduction
·Whether the alloy was formed by the reduction of phosphorus in the iron minerals or by the reduction of apatite is unclear In the energy spectrum results at points 10 12 in Fig 7 when the molar ratio of C/O was phosphorus was present in the metallic iron particles and the phosphorus content in the iron particles increased to %
·Deep dephosphorization of high‑phosphorus oolitic iron ore HPOIO is extremely difficult because of its refractory characteristics A new approach for simultaneous iron recovery and dephosphorization from HPOIO by oxidation roasting gas based reduction ORGR and magnetic separation process was developed The underlying mechanism was investigated
·The phosphorus content is at % in the metallic phase of ore specimen mixed with the graphite powder Fig 1a spectra 1 and 2 which is much higher than that upon reduction in a carbon monoxide atmosphere Fig 1b spectrum 2 However there is no full reduction under these conditions because iron and phosphorus are also present in the oxide
·The gasification removal behaviour of phosphorus from high phosphorus iron ore is theoretically and experimentally studied in the temperature range of 400 900 °C under H 2 reducing and N 2 atmospheres In the first step thermodynamic analysis is conducted to reveal the gasification and reaction behaviours of common phosphorus compounds namely P 4 O
·Characterization studies on Agbaja iron ore a high phosphorus content ore
·This paper aims at reviewing literature on the occurrence of phosphorus in iron ores from the mines around the world The review extends to the phosphorus removal processes of this mineral to meet the specifications of the steel industry Phosphorus is a contaminant that can be hard to remove especially when one does not know its mode of occurrence in the
·Muko ore is a rich hematite grade with Fe content above 65% The study aimed at investigating the chemical composition and microstructure of raw iron ore from the deposits in Muko area south western Uganda The quality of this iron ore was evaluated to establish its suitability to serve as a raw material for iron production Samples were taken from the six hills
·The iron grade and phosphorus content in powdery reduced iron were determined using chemical titration and spectrophotometric method respectively The main compositions of the powdery reduced iron and cleaned tailings were determined by XRF EDX 7000 Shimadzu Japan Toxicity characteristic leaching procedure TCLP analysis
·The phosphorus content in this ore was found to be wt% which is higher than the wt% which is considered to be low phosphorus content in iron ore and higher than which is considered to be a high phosphorus hematite goethite ore 2 18 Based on the chemical analysis of the ore shown in Table I the amount of removable oxygen
The phosphorus concentration in the reject water was reduced by 90% during bioreduction of iron ore The phosphorus removal rate did not depend on specific surface area of iron ore particles when the particle size of iron ore was smaller than 7 mm The organic carbon removal rate did not seem to be dependent on iron ore particle size
·High phosphorus iron ore resource is considered a refractory iron ore because of its high phosphorus content and complex ore phase structure Therefore the development of innovative technology to realize the efficient utilization of high phosphorus iron ore resources is of theoretical and practical significance Thus a method for phosphorus removal by gasification
·The results present Muko ore as a high grade of hematite with an Fe content averaging 68% The gangue content SiO 2 Al 2 O 3 of 5 of the 6 samples investigated is < 4% which is within the tolerable limits for the dominant iron production processes with its S and P contents being < % and % respectively Thus Muko iron ore can be
