Mechanism of phosphorus removal in beneficiation of high ...

Trans. Nonferrous Met. Soc. China 22(2012) 2806âˆ'2812 Mechanism of phosphorus removal in beneficiation of high phosphorous oolitic hematite by direct reduction roasting with dephosphorization agent XU Cheng-yan, SUN Ti-chang, KOU Jue, LI Yong-li, MO Xiao-lan, TANG Li-gang Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and ...

roast leach iron ore operation - maroevenementen.nl

Removal Of Phosphorus From Lisakovsky Iron Ore By A Roast-Leach Process: SUMMARY Lisakovsky is a 3, roasting of iron ore for ugradation - stone Effect of magnetizing roasting on removal of iron from bauxite ore for, of iron from manganese ore roast, iron ore roasting pyrite roasting …

Selective Leaching of Vanadium from Roasted Stone Coal by ...

ores by selective HCl leaching method and found that, under proper conditions, the removal rate of phosphorus could exceed 98% [10]. The removal of phosphorus from high phosphorus iron ores using acid leaching had also been investigated by Chen and Jin, and the high removal rate of phosphorus has been realized [11,12].

CN101338361A - Method for reducing phosphorus in high ...

The invention relates to a high phosphorus hematite-hematite-limonite magnetic roasting-extraction phosphorous reduction method, in particular applicable for an extraction phosphorous reduction method for the iron ores which mainly include the hematite-hematite and the limonite and accompany with magnetite, pyrrhotite, iron pyrites, etc.

Predictability of Phosphorus Removal Based on ...

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 temperature of 600°C for 10minutes. The model; P = 61.8477 x 10 -3 μ - 2.27S shows that the predicted concentration of removed phosphorus, is dependent on the mass ...

Recovery of iron from high phosphorus oolitic iron ore ...

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.

roasting of mineral ore - YouTube

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Roasting (metallurgy) - Wikipedia

Roasting is a process of heating of sulfide ore to a high temperature in presence of air. It is a step of the processing of certain ores.More specifically, roasting is a metallurgical process involving gas–solid reactions at elevated temperatures with the goal of purifying the metal component(s). Often before roasting, the ore has already been partially purified, e.g. by froth flotation.

Effect of coal levels during direct reduction roasting of ...

The effect of coal levels on phosphorus removal from a high phosphorus oolitic hematite ore after direct reduction roasting have been investigated. Raw ore, coal, and a dephosphor

The modern techniques of involvement of phosphorous ...

it is expedient to use hydrometallurgical leaching of phosphorus. The variant developed in Russia [4] is offered as the most effective one. It includes the preliminary sweet roasting of iron-ore material with subsequent phosphorus leaching from the roasted product with a weak inorganic acid.

Influence of Mechanical Activation on Acid Leaching ...

Abstract. High pressure roll grinding (HPRG) and ball milling were compared to investigate the influence of mechanical activation on the acid leaching dephosphorization of a high-phosphorus iron ore concentrate, which was manufactured through magnetizing roasting-magnetic separation of high-phosphorus oolitic iron ores.

Removal of Phosphorus from High-Phosphorus Iron Ores by ...

The phosphorus removal from high-phosphorus iron ores by sodium roasting was studied. The effects of ratio of NaOH to NaCO3, roasting temperature and reaction time on the dephosphorization ratio were investigated. The results showed that the dephosphorization ratio can reach 80.1% under the conditions of ratio of NaOH to NaCO3 5:6, roasting temperature 1100°C, and reaction time 120min.

Predictability of Phosphorus Removal Based on ...

solution pH, initial leaching temperature, mass-input of the iron oxide ore and ore mineralogy etc.Results [7] obtained from experiment and derived models have indicated that the removal of phosphorus during leaching of iron oxide ore in oxalic acid solution is also achievable based the mass-input of iron oxide ore and the final solution pH.

Behavior of Fe and P during reduction magnetic roasting ...

Behavior of Fe and P during reduction magnetic roasting-separation of phosphorus-rich oolitic hematite Hanquan Zhang a, Zeqiang Zhang, Liqun Luob, and Hong Yu aSchool of Resources and Civil Engineering, Wuhan Institute of Technology, Wuhan, China; bSchool of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, China

reduction roasting method for manganese ore - aircondi.co.za

Removal of Potassium and Sodium in Sintering of Iron Ores. ... Reduction-roast Leaching of Low-grade Pyrolusite ... - CiteSeerX ... MANGANESE ORES BY METHOD OF NUCLEAR GAMMA- ... of completing regenerative processes at magnetizing roasting, and also the pr ocesses of formation of ... we managed to reduce iron content and to achieve in the.

Magnetizing Roasting Mechanism and Effective Ore Dressing ...

Magnetizing Roasting Mechanism and Effective Ore Dressing Process for Oolitic Hematite Ore ... Without prior phosphorus removal, the phosphorus was …

REMOVAL OF PHOSPHORUS THROUGH ROASTING OF …

REMOVAL OF PHOSPHORUS THROUGH ROASTING OF OOLITIC IRON ORE WITH ALKALINE EARTH ADDITIVES . Roasting, separation and leaching procedures . The preliminary orientation tests have shown that during leaching with 0.96 M sulfuric acid at boiling temperature

Synchronous Upgrading Iron and Phosphorus Removal …

removal of phosphorus from oolitic hematite ore, such as chemical leaching [3–5], bio-leaching [6–8], magnetic roasting [9], selective agglomeration-reverse flotation [10], physical separation and direct reduction-magnetic separation [11,12]. Note that the direct reduction process to upgrade this type of

Roasting-induced phase change and its influence on ...

Abstract In the present study, roasting-induced phase change and its influence on phosphorus removal via leaching has been investigated for high-phosphorus iron ore. The findings indicate that phosphorus in the ore is associated with goethite and exists mainly in amorphous Fe 3 PO 7 phase. The phosphorus remains in the amorphous phase after ...

Microwave Assisted Liberation of High Phosphorus Oolitic ...

The influence of microwave treatment on the liberation of iron ore from the high phosphorus oolitic iron ore from Aswan region, Egypt was studied. The effect of microwave power, exposure time and grain size on the liberation of iron ore was investigated. The microfractures and cracks of the samples were characterized before and after microwave treatments.

CN106065436A - Method and system for treating vanadium ...

The invention discloses a method and system for treating vanadium slag and belongs to the field of extracting of valuable metal in the vanadium slag. The invention firstly discloses the method for treating the vanadium slag. The method includes the steps that the vanadium slag is subjected to oxidization magnetizing roasting firstly so that iron in the vanadium slag can be converted into ...

Method for obtaining dephosphorised concentrate of oolitic ...

The solution after leaching, phosphorus is used to produce phosphate fertilizers. ... while the spectrum is cooled to the temperature range of magnetizing roasting 750-860°C, crushed and through magnetic separation, grinding is divided into clinker and concentrate. ... Positive results solve phosphorus removal prior to refining to achieve the ...

Processes for phosphorus removal from iron ore - a review

Removal of phosphorus from high phosphorus iron ores by selective HCl Leaching method. Journal of Iron and Steel Research, International, v. 18, p. 01-04, 2011. [ Links ] XU, C. et al. Mechanism of phosphorus removal in beneficiation of high phosphorous oolitic hematite by direct reduction roasting with dephosphorization agent. Trans ...

iron ore mining in china leaching process

Processes for phosphorus removal from iron ore - a review - SciELO. Mining. Processes for phosphorus removal from iron ore - a review. Antônio Clareti ... Samples of Changde (China) were submitted to assays. ... Alkaline leaching is effective for removal of the phosphorus present in apatite and silicates;. Get Price

removal of phosphorus from lisakovsky iron ore by a roast ...

technology process of removal of phosphorus from iron ore …. Removal of phosphorus from Lisakovsky iron ore by roast-leach process … obtained from the direct leaching of iron ore (the phosphorus removal) with HNO 3. »More detailed

Iron ore - Wikipedia

The two main methods of recycling iron from iron ore tailings are magnetizing roasting and direct reduction. Magnetizing roasting uses temperatures between 700 and 900 °C for a time of under 1 hour to produce an iron concentrate (Fe 3 O 4) to be used for iron smelting.

PROCESS ORIENTED CHARACTERIZATION OF OOLITIC IRON ...

To outline the effect from roasting on phosphorus removal two representative samples of 1.6 kg were likewise roasted for one hour at 900°C with and without NaOH, after which were left to cool down to room temperature for 16 hours. Then preliminary phosphorous removal tests (leaching / magnetic separation) were carried.

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