Effective Cu(II) ions adsorption from aqueous solutions
Effective Cu(II) ions adsorption from aqueous solutions using low grade oolitic hematite tailing with phosphorus: response surface methodology Xiaoli Yuan*, Fuming Luo, Xixi Chen, Wentang Xia*, Yin Zou, Xuejiao Zhou, Hao Liu, ... Keywords: Low grade oolitic hematite tailing with phosphorus (LGOHTWP); Cu(II) ion removal;·
Minerals | Free Full-Text | Growth Behavior and …
To reveal the growth behavior and size characterization of iron particles in coal-based reduction, we reduced oolitic hematite–coal composite briquettes at various temperatures, durations and ore size …
Effects of CaCO 3 as Additive on Coal-based Reduction of …
Recently, additives such as CaCO 3 and Na 2 CO 3 have been proven to be capable of enhancing the reduction of high-phosphorus oolitic hematite ore and obtaining high-grade direct reduction iron (DRI) with low-P by magnetic separation. In this study, the mechanisms of adding CaCO 3 during direct reduction were further studied by gas analyzer, X-ray …
An Innovative Technology for Utilization of Oolitic …
Yanjun Li. Oolitic hematite, as a complex and refractory iron ore resource, can be efficiently utilized by magnetic roasting. In this study, to ascertain the mechanism …
Slag/Metal Separation from H 2 -Reduced High Phosphorus Oolitic Hematite
A process of H 2 reduction followed by the slag/metal separation for the utilization of high-phosphorus oolitic hematite has been proposed. The H 2 reduction was conducted at 1073 K in a horizontal rotary electric resistance furnace, which significantly promotes the metallization ratio of reduced ore fines. Thermodynamic calculation of H 2 reduction for …
Strengthening iron enrichment and dephosphorization …
province, and Tunqiu in Guangxi province is all oolitic hem-atite [1–2]. Some oolitic hematite ores in China have a high-phosphorus content in the general range of 0.4wt% to 1.2wt%, which are referred to as high-phosphorus oolitic hematite ores. The high-phosphorus oolitic hematite in China with reserves of 3.72 billion tons is mainly composed
Research on efficient utilization of high-phosphorus …
The paper proposes the innovative technology of hydrogen mineral phase transformation–magnetic separation–acid leaching for iron enrichment and …
Research on the reduction of Guizhou oolitic hematite by …
The reduction of Guizhou oolitic... | Find, read and cite all the research you need on ResearchGate ... Research on the reduction of Guizhou oolitic hematite by hydrogen. January 2016; Green ...
Industry Test on Phosphorus Removal and Direct Reduction …
Industry test on phosphorus removal and direct reduction of the "Ningxiang type" high-phosphorus oolitic hematite ore has been carried out in a tunnel kiln on the basis of laboratory experiment. The iron grade and phosphorus content of the initial sample are 42.46% and 0.867%, respectively. The results showed that high-phosphorus oolitic …
An innovative technology for utilization of oolitic hematite …
Oolitic hematite possesses the characteristics of large resource reserves, low iron grade, fine embedded particle size and complex mineral composition, which is difficult to be used efficiently through traditional beneficiation process. In this work, a new technology of microwave fluidization pretreatment (MFP) was proposed to strengthen the …
An alternative and clean utilisation of refractory high …
Abstract. High-P oolitic hematite is recognised as one of the most refractory mineral resources because of the special oolitic structure. Conventional selective reduction roasting is characterised by high energy consumption and large greenhouse …
Behavior of Phosphorus during Reduction Roasting of Oolitic Hematite
Oolitic hematite ore with high-phosphorus content is currently recognized as one of the most refractory iron ore resources in the world. The high-phosphorus content and unique structure of the oolitic hematite ore make it difficult to be beneficiated. ... Keywords. Phosphorus; Direct reduction; Oolitic hematite; Metallic iron; Chapter PDF ...
Dephosphorization of high phosphorus oolitic hematite …
Keywords: Acid leaching High phosphorus oolitic hematite Dephosphorization Iron loss Kinetics ABSTRACT It is highly difficult to remove phosphorus from high phosphorus oolitic hematite by the usual dressing process. Acid leaching is an effective method for the dephosphorization of high phosphorus oolitic hematite. The acid
Dephosphorization of high phosphorus oolitic hematite …
The oolitic structure is concentric rings with fine-dispersed gangue. Based on the morphology change and the EDS analysis before and after the leaching process, the apatite in the oolitic hematite exists in the core of the ooide (the right dark banana-like area in Fig. 10 (a)), and sandwiches in the hematite layers (position 1 in Fig. 10 (a)).
Metals | Free Full-Text | Synchronous Upgrading Iron and
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 0.09% was produced from an oolitic hematite ore containing 48.96% iron and 1.61% phosphorus, where …
A New Route to Upgrading the High-Phosphorus Oolitic Hematite …
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 process parameters of sodium magnetization roasting, acid leaching, and alkaline …
Strengthening iron enrichment and dephosphorization of …
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 …
An Innovative Technology for Utilization of Oolitic Hematite …
ABSTRACT. Oolitic hematite, as a complex and refractory iron ore resource, can be efficiently utilized by magnetic roasting. In this study, to ascertain the mechanism of microwave fluidization roasting technology (MFR) for the utilization of oolitic hematite, the influence of MFR on mineral magnetism, ore microstructure, mineral phase …
Selective Liberation of High-Phosphorous Oolitic …
Keywords: oolitic hematite; microwave; acid leaching; selective liberation; dephosphorization 1. Introduction As a typical refractory iron ore, high-phosphorus oolitic hematite is distributed widely and is an abundant resource worldwide. There are approximately 30–40 billion tons of high-phosphorus
Recycling iron from oolitic hematite via microwave …
Oolitic hematite is an iron ore resource with complex refractory characteristics, abundant reserves, and significant recycling value. In this study, a clean …
Selective Liberation of High-Phosphorous Oolitic Hematite …
The release of valuable minerals from the associated gangues is called liberation. Good liberation is essential to the subsequent separation stage. Selective liberation is advantageous to improve the degree of liberation. Oolitic hematite is one of the typical refractory iron ores in China, and its resources are abundant. However, owing …
A New Route to Upgrading the High-Phosphorus Oolitic …
of oolitic hematite ore at 1200 C, and a directly reduced iron assayed at 93.28% Fe and 0.07% P was obtained with an iron recovery of 92.30%. Direct reduction is an efficient way to separate iron and phosphorus from oolitic hematite ore [23]. However, the amount of reductant required is very high and the reduction time is very long, …
Behavior of phosphorus during the carbothermic
Recently, additives such as Na 2 SO 4 and Na 2 CO 3 have been proven to be capable of enhancing the reduction of phosphorus-rich oolitic hematite ore and the recovery of dephosphorized iron by magnetic separation. In this study, the behavior of phosphorus during the carbothermic reduction of a phosphorus-rich oolitic hematite ore …
Reaction Behavior of Phosphorus in Coal-Based …
Keywords: oolitic hematite ore; reduction; phosphorus; migration behavior; pre-dephosphorization 1. Introduction Due to the depletion of high quality iron ores with the rapid development of the iron and steel industry, the utilization of refractory iron ores has recently attracted increased attention [1–3].
Metallic Iron Particles in Coal-Based Reduction of Oolitic …
Keywords: oolitic hematite–coal composite briquettes; particle size; growth behavior; size characterization; coal-based reduction 1. Introduction Oolitic hematite ore is a significant existing form of iron ores, which are widely distributed in France, Germany, the United States, Canada, Pakistan, China, and other countries [1,2]. In China,
Separation of Iron and Phosphorus from High …
Keywords. Oolitic hematite. Direct reduction. Phosphorus removal. Magnetic separation. Download conference paper PDF. Introduction. China has large …
Effect of Raw Material Particle Size on the Direct Reduction
With the continuous consumption of easy-to-treat, high-grade iron ores, the effective utilization of difficult-to-treat iron ores such as high-phosphorus oolitic hematite has gradually become a popular research topic [1,2,3].High-phosphorus oolitic hematite is primarily distributed in Nigeria, Saudi Arabia, Libya, Algeria, the USA, and China, and its …
Enhance the carbothermic reduction of high phosphorus oolitic hematite
The reduction of high phosphorus oolitic hematite, especially for the accumulation and growth of iron played an important role in subsequent magnetic separation, the influence of borax on which was studied. It was indicated that the mass loss percent was up to 31.11% and the metallization ratio was up to 90.10% when the temperature was 1000 °C and the …
A New Route to Upgrading the High-Phosphorus Oolitic Hematite …
hematite layers to form an oolitic structure, and part of the granular apatite is dispersed between the oolitic structure. A SEM image of the oolitic structure is shown in Figure 3 .
Flotation Dephosphorization of High-Phosphorus Oolitic …
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 …