An innovative process of coal-based reduction followed by magnetic separation and dephosphorization was developed to simultaneously recover iron and phosphorus from one typical high-phosphorus refractory iron ore. The experimental results showed that the iron minerals in iron ore were reduced to metallic iron during the coal-based reduction and the phosphorus was enriched in the metallic iron.
The characterization of high phosphorus iron ore was carried out using X-ray diffraction analysis. It can be noticed that the iron ore sample mainly contains hematite phase with total iron percent 55.7 beside some impurities such as quartz, apatite [Ca 5 (PO 4) 3 F] and kaolinite as shown in Figure 1.
It is predicted that the identified premium grade iron ore with low phosphorus content under 0.05 wt will be depleted within 30 years at the current rate of mining. 1,2) Especially in China, as the biggest iron ore import country, it is urgent to exploit the domestic iron ores like the rich high phosphorus oolitic hematite resource, while it.
This study focuses on the reduction of phosphorus from high-phosphorus-content oolitic iron ore via coal-based reduction. The distribution behavior of phosphorus (i.e., 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 was strongly.
Oolitic iron ore is one of the most important iron resources. This paper reports the recovery of iron from high phosphorus oolitic iron ore using coal-based reduction and magnetic separation. The influences of reduction temperature, reduction time, C O mole ratio, and CaO content on the metallization degree and iron recovery were investigated in detail.
Phosphorus contents in ancient Indian iron. The possible reason for this high phosphorus content has been explored by analyzing dephosphorization process. The equilibrium distribution of phosphorus between metal and slag phase has been evaluated in ancient and modern irons utilizing thermodynamic and empirical models. Oxygen and phosphorus.
This paper reports the recovery of iron from high phosphorus oolitic iron ore using coal-based reduction and magnetic separation. The influences of reduction temperature, reduction time, C O mole ratio, and CaO content on the metallization degree and iron recovery were investigated in detail.
May 01, 2011 In this paper, the effect of reaction time, high phosphorus iron ore particle size, dephosphorization agent concentration, stirring strength (G) , liquid- solid ratio (amount of leaching solution with differ- ent concentration amount of iron ore, different liq- uid-solid ratios represent different addition of acid) and reaction temperature on.
2.1. Iron Ore Sample Analysis. The high phosphorus oolitic iron ore used in this research was obtained from western Hubei in China. Table 1 shows the chemical composition of the ore examined by chemical analysis, indicating that iron content reached 51 , and phosphorus content was 0.52 . If phosphorus could be removed appropriately, the ores of this kind would be of great value in use.
In this study, an iron ore was investigated with high content of phosphorus and sulphur about 1.09 and 1.4 , respectively. The grade of Fe is about 30 , which is mainly composed of siderite, about 23.40 of iron is existed in the form of silicate, such as chlorite, canbyite, and a small amount of pyrite, magnetite. The phosphorous mainly occurred as apatite, which is close united with the.
Feb 20, 2011 Smelting reduction iron making technology will solve the coke shortage and environmental pollution, which has become a major research of. Iron development. By oxygen top-blown high-phosphorus iron ore smelting reduction test, that the use of oxygen top-blown molten high phosphate smelting reduction technology is feasible, and inappropriate smelting conditions, the iron.
In the process of resource utilization of high phosphorus iron ores, phosphorus should be removed first. Compared to other dephosphorization methods, selective leaching with acid has special advantages such as high dephosphorization ratio, low iron loss and so on. However, a large amount of acidic wastewater containing phosphorus was produced after acid leaching.
Smelting reduction iron making technology will solve the coke shortage and environmental pollution, which has become a major research of. Iron development. By oxygen top-blown high-phosphorus iron ore smelting reduction test, that the use of oxygen top-blown molten high phosphate smelting reduction technology is feasible, and inappropriate smelting conditions, the iron recovery rate can.
Sep 01, 2010 A new method (gas-based separation plus melt separation) has been proposed to remove phosphorus of the high phosphorus iron ore which was 1.25 of phosphorus content and 50.0 of iron content. HSC chemistry package and the coexistence theory of slag structure were adopted for theoretical analysis.
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.
Apr 07, 2011 Yong-sheng Sun, Yue-xin Han, Peng Gao and Duo-zhen Ren, Distribution behavior of phosphorus in the coal-based reduction of high-phosphorus-content oolitic iron ore, International Journal of Minerals, Metallurgy, and Materials, 21, 4, (331), (2014).
May 26, 2019 The efficient development and utilization of high-phosphorus oolitic hematite is of great strategic significance for the sustainable supply of iron-ore resources in China. In this paper, the mechanism of high-temperature pretreatment for enhancing the effect of iron enrichment and dephosphorization in the magnetization roasting–leaching process was studied by X-ray diffraction.
Showed that high temperature, low basicity and high carbon content is conducive for the apatite in iron ore to reduce into molten iron, but not conducive to the removal of phosphorus. Through optimisation of process parameters, dephosphorisation rate of high phosphorus hematite is than 60 per cent by.
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.
Jun 21, 2019 phosphorus content. Experimental research on a high-phosphorus oolitic iron ore containing 41.65 iron and 1.26 phosphorus that had been treated by suspended ﬂash magnetic roasting, indicated that a concentrate with an iron grade above 60 could be produced by LIMS, but the phosphorus content exceeded 0.90 [13–15].
The Leveniemi iron ore occurs mainly in sedimentary rocks. In the coexisting iron-copper ore deposits at Tjaarrojaakka, high phosphorus contents are often found.In northern Sweden, there is also apatite enrichment in the ores and wall rocks which lie below the Kiruna-type ores. These ores.
(1966). The phosphorus content in the iron concentrate is about 0. 6 – 0.8 and the studies has shown that it is not represented as separable from iron minerals species, Belikov . et al (2002), Ionkov . et al (2011) but is included in limonite as a solid solution. Attempts for physical separation of phosphorus from similar Australian iron ore.
Pollution in addition to high operation cost. Bio-leaching is another method for removal of phosphorus from high phosphorus iron ores [17–19]. For example, than 80 phosphorus was removed from iron ore containing 1.04 phosphorus after 21 days of leaching using sulfur-oxidizing bacteria with a particle size +0.074–0.1 mm.
The centre had a virtually uniform experiment XP27, raised some interesting carbon content of 0.5 to 0.7 and small zones questions about its content of carbon and near the upper surface, in the tuyere zone, were phosphorus, as well as the enrichment of as high as 0.8 carbon. arsenic, cobalt and nickel (Crew 1991, Crew and Salter 1993).
Jun 02, 2021 The absence of lime in the slag and the use of specific quantities of wood with high phosphorus content during the smelting induces a higher phosphorus content than in modern iron produced in blast furnaces. This high phosphorus content is an essential catalyst in the formation of the passive protective film that forms a barrier by adhering in.
Phosphorus and its evolvement rules, as well as the regularity of influence on the quality of pellets which system to clarify high phosphorus dephosphorization mechanism of pellets for high phosphorus iron ore powder and the actual production of the high phosphorus steel slag is efficient to provide theoretical and technical support. 2.
Reduced to phosphorus which smelt into metallic iron with coal slime as reductant. This led to a high phosphorus content of DRI. This research could provide support to the idea concept for recycling of carbon-containing solid waste and to assist the effective recovery of refractory iron ore by direct reduction–magnetic separation.
With the present rates of iron ore consumption, currently unusable, high-phosphorus iron ore deposits are likely to be the iron ores of the future as higher-grade iron ore reserves are depleted. Consequently, the design and timely development of environmentally-benign processes for the simultaneous beneficiation of high-phosphorus iron ores and phosphorus recovery, currently a technological.