A technique has been proposed for recovering iron from hematite-rich diasporic-type bauxite ore in this study. Direct reduction roasting followed by low intensity wet magnetic separation process was carried out. The parameters including reduction temperature and...
DOI: 10.1016/J.MINPRO.2012.10.005 Corpus ID: 94833220; Utilisation of ultrasonic treatment for upgrading of hematitic/goethitic iron ore fines @article{Donskoi2012UtilisationOU, title={Utilisation of ultrasonic treatment for upgrading of hematitic/goethitic iron ore fines}, author={Eugueni Donskoi and Anthony F. Collings …
The technology of direct reduction by adding sodium carbonate (Na2CO3) and magnetic separation was developed to treat Western Australian high phosphorus iron ore. The iron ore and reduced product were investigated by optical microscopy and scanning electron microscopy. It is found that phosphorus exists within limonite in the form of solid …
Four different iron ore fine samples (Ores 1, 2, 3 and 4) were examined. All were derived from Australian hematitic/goethitic ores. The ore fine samples described in this article as Ore 1 and Ore 2 were fractions from two different ores with size below 300 μm.Size distributions for these samples are given later in the text.
In this paper, an innovative method is proposed to upgrade iron and remove phosphorus from high-phosphorus oolitic hematite ore by the sodium magnetization roasting–magnetic separation–sulfuric acid and sodium hydroxide leaching process.
The feasibility of dephosphorization using the flotation process and its mechanism of high-phosphorus oolitic hematite were discussed in this paper. The results showed that phosphorus minerals mainly exist in the form of collophane, which can be divided into three types. Block collophane and band collophane could be effectively …
(DID). The BIF-derived iron ore deposits of the Pilbara, Yilgarn and Gawler cratons represent a very significant iron ore resource for Australia, with current and previous production dominated by the Pilbara iron ore deposits (Table 1). The microplaty hematite ores and martite– goethite ores are the most important BIF-derived ores.7
Recently, a new method of upgrading a high-phosphorus oolitic hematite ore by sodium magnetization roasting–-magnetic separation–leaching was developed and showed an iron recovery rate of 88.7% and a dephosphorization rate of 82.7% under optimal conditions. 11,12 A comprehensive thermodynamic analysis of phosphorus …
Efficient use of abundant low-grade siderite ores can potentially mitigate the shortage of iron ore in the iron and steel industry in China. In this work, the beneficiation of siderite fines containing high levels of carbonates was studied using a combined fluidized-bed magnetizing roasting process. The siderite was almost completely converted into …
It is a BIF type of ore containing hematite, magnetite and a bit of siderite, and an average content of Fe is about 34.6%. ... due to its benefits of further upgrading iron ore and improving separation efficiency. The most important pre-concentration technique for iron ore is magnetic separation, including low-intensity magnetic separation and ...
In this study, direct reduction-magnetic separation process was applied to enrich phosphorus and iron to prepare Fe-P crude alloy from a high phosphorus oolitic hematite ore (HPOH). The results show that at lower temperatures and with absence of any of additives, Fe cannot be effectively recovered because of the oolitic structure is …
In this study, a pilot-scale experiment on the iron recovery from iron ore tailings was investigated using innovative technology of pre-concentration and …
Iron ore pellets are made from both magnetite and hematite ores. Hematite ores are concentrated using a flotation process. Pellets include a mineral binder that represents about 2% by weight.
Highlights. •. The process was used for efficient iron recovery and dephosphorization. •. The reduction temperature was reduced by approximately 250 °C. …
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 …
A thermodynamic analysis of iron and phosphorus. In this paper, an effective method was developed to remove phosphorus and upgrade iron from high phosphorus oolitic hematite ore by high temperature flash reduction—a wet magnetic separation process. A thermodynamic analysis of iron and phosphorus
Magnetization roasting is one of the most effective way of utilizing low-grade refractory iron ore. However, the reduction roasting of siderite (FeCO3) generates weakly magnetic wüstite, thus reducing iron recovery via weak magnetic separation. We systematically studied and proposed the fluidized preoxidation-low-temperature …
The technology of direct reduction by adding sodium carbonate (Na2CO3) and magnetic separation was developed to treat Western Australian high phosphorus iron ore. The iron ore and reduced product were investigated by optical microscopy and scanning electron microscopy. It is found that phosphorus exists within limonite in the …
employed to enhance the reduction roasting of oolitic hematite ore, growth of metallic iron grains and removal of phosphorus in a short time, thus improving the efficiency. 2. Experimental 2.1. Raw Materials 2.1.1. Oolitic Hematite Ore The oolitic hematite ore with high phosphorus content used in the paper was collected from Western Hubei, China.
In this paper, the effect of temperature, C/O ratio, and reduction time on dephosphorization of high phosphorus oolitic hematite was investigated. In addition, the …
Australia is one of the largest global producers of iron ore, and the dominant ore exported by Australia is hematite ore (McKay et al., 2014). However, there has been a gradual decrease over time in the discovery of large hematite ore bodies, as well as a decline in the quality of hematite ore exported from large-scale producers such as ...
In the calcine laterite product, the iron content increased due to changes of phases from hematite to magnetite, as well as to elemental iron resulted from roasting reduction. 3.1.2 X-ray Diffraction Before reduction, the raw material of laterite iron ore contained hematite, magnetite, and nickelchrome iron oxide, and also aluminum hydroxide as ...
The huge consumption of iron ores in China has attracted much attention to utilizing low grade complex iron resources, such as high-aluminum hematite-limonite ore, which is a refractory resource ...
In this study, a combination of alkali roasting and hydrothermal treatment is used as a method of gangue (Si, Al, and P) removal from iron ores as a means to upgrade low-grade iron ore (limonite) into a high-grade iron ore with low gangue content, low porosity, and high Fe and Fe2O3 content to enhance the sustainable development of iron and steel …
A technical route has been proposed to upgrade diasporic bauxite ores for iron and alumina enrichment based on reductive roasting, followed by magnetic separation and alkaline leaching. The thermodynamic analysis revealed that by reductive roasting of the bauxite ore at 980–1100°C, hematite in the ore is transformed to magnetite and …
The best pH for impurities removal from the iron ore by upgrading iron grade with the DTAB collector was pH 12. ... (Al) and phosphorus (P) impurities from low-grade iron ore, in which hematite ...
Upgrading of High-Aluminum Hematite-Limonite Ore by High Temperature Reduction-Wet Magnetic Separation Process. ... balling the high aluminum iron ore with 15% coal blended and at 0.3 basicity ...
The early hematite beneficiation is mainly gravity separation with machines of jigger, centrifugal separator, spiral chute, spiral washer, shaking table can be involved and later floatation separation has been used in the hematite iron ore upgrading with floatation separator and magnetic separator involved. However, these single separation ...
Utilizing in situ iron oxide U-Pb geochronology, we provide a direct timeline of events tracing development of all the giant BIF-hosted hematite deposits of the Hamersley Province (Pilbara Craton, Western Australia). Direct dating demonstrates that the major iron ore deposits in the region formed during 1.4 to 1.1 Ga.
1. Introduction. Hematite ore has traditionally been considered to be of greater economic importance than magnetite ore, as high-grade hematite ore contains fewer impurities and therefore has lower processing costs (McKay et al., 2014).Australia is one of the largest global producers of iron ore, and the dominant ore exported by …