In some iron and steel smelters have indeed studied and developed methods for dephosphorization of hot metal, such as SARP, SMP and ORP, but these methods usually only have a good effect on low phosphorus (less than 0.15%) hot metal, and the removal effect is limited for iron ore with high phosphorus content, and can …
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 …
Amenability for processing of oolitic iron ore concentrate for phosphorus removal. Miner. Eng., 46 (2013), pp. 119-127, 10.1016/j.mineng.2013.03.028. View PDF View article View in Scopus Google Scholar. Keith, 2018. Q. Keith. A review on the characterisation and processing of oolitic iron ores.
Under the conditions, reductive temperature of 1150°C, duration time of 60 min, mass ratio of briquettes to pea coal of 1:1, the reduced iron powder with an iron grade of 93.21% and phosphorus ...
The current study was focused on the removal of sulfur from iron ore concentrate using chemical leaching technique. Magnetite iron ore concentrate was chosen for this purpose. The results obtained from the study showed that more than 90% of the total sulfur content was removed from the iron ore concentrate by the chemical leaching.
The oxidations of iron concentrate with both acidophilic bacteria and ferrous sulfur oxide bacteria were an acid-consuming reaction [30], resulting in an elevated pH in the bioleaching system during the first day. Subsequently, S 0 and Fe 2+ in the iron concentrate were further oxidized by mixed Acidophilic microbiota and A. ferrooxidans.
Alkali-leaching and acid-leaching were proposed for the dephosphorization of Changde iron ore, which contains an average of 1.12% for phosphorus content. Sodium hydroxide, sulfuriced, hydrochloric and nitric acids were used for the preparation of leach solutions. The results show that phosphorus occurring as apatite phase could be …
Table 1: Phosphorus removed from one tonne of grain for various crops. Crop Phosphorus removal (kg) Wheat 3 Barley 3 Lupins 5 Canola 7 Oaten Hay 3 Leaching and placement of phosphorus. Phosphorus movement in soil varies depending on soil type, although it generally stays very close to where it is placed.
Overall, the acceptable level of phosphorus, sulphur and silica in the iron concentrate should be less than 0.04%, 0.15 % and 1.5 % respectively. Scarcity of high …
When the C/O molar ratio was increased from 0.3 to 0.9, no iron-phosphorus alloy was formed; this provided the basis for subsequent dephosphorization. When the C/O molar ratio exceeded 0.9, an iron-phosphorus alloy began to form. This indicated that a reducing atmosphere controlled the reduction of phosphorus in …
Phosphorus is one of the main nutrients required for all life. Phosphorus as phosphate form plays an important role in different cellular processes. Entrance of phosphorus in the environment leads to serious ecological problems including water quality problems and soil pollution. Furthermore, it may cause eutrophication as well as …
utilization of high-phosphorus iron ore becomes the focus. With calcium carbonate (CaCO 3), calcium chloride (CaCl 2), or calcium sulfate (CaSO 4) as additive, the process of direct reduction and phosphorus removal of high-phosphorus iron ore (phosphorus mainly occurred in the form of Fe 3PO
A hydrometallurgical method for the removal of phosphorus from iron ore is presented. The apatite content (∼ 1%) of a Swedish ore is removed (> 95%) by leaching the ore with nitric acid. ... The iron ore concentrate used in this study is an oolitic type of iron ore consisting primarily of goethite, in which phosphorus does not form a discrete ...
The current study was focused on removal of sulfur from the iron ore concentrate by using the chemical leaching technique. The magnetite iron ore concentrate was chosen for this purpose.
In this review, there is an overview of phosphorus role in nature provided, available removal processes are discussed, and each of them is explained in detail. …
The reduction of phosphorus content at the concentrate of some iron ore mines in Mexico, Sweden and Iran, where the apatite is the main phosphorous mineral, can be easily reached through anionic flotation with fatty acids collectors to float the apatite when sodium silicate is used to depress the iron oxides (Subramanian et al., 2002, …
The results show that there are still difficulties to obtain plausible iron and phosphate concentrates in terms of phosphorus and iron impurities for iron and phosphate concentrate, respectively.
Electrocoagulation technique was tested to remove phosphonates from concentrates. • Calcium has a key role in the coagulation process and the adsorption of phosphorus. • Phosphorus removal was identical when treating real and synthetic concentrates. • Analysis of the flocs revealed main presence of hematite and calcium …
A laboratory study to evaluate the possibility of sulphur and phosphorous removal from iron ore concentrate by leaching. Hassan Rezvani Pour 1 a, Ali Mostafavi 1, Tayebeh Shams Pour 1, Ghobad Ebadi Pour 2 and Amir Haji Zadeh Omran 2. ... The magnetite iron ore concentrate was chosen for this purpose. The results obtained …
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 . ... resistant to acid leaching and phosphorus removal during these tests has never exceeded 12 %. Feld . et al, (1966) have tested roasting in the presence of metal ...
The influence of the iron salt dosage resulted in different Fe/P molar ratios. The residual P concentration in the solution was 2.44 mg/L when the initial Fe/P mol = 1, and the P removal efficiency was only 74.2% (Fig. 1 (B)). This is because although the Fe and P in FePO 4 are equimolar, the metal salt dose and the P to be removed were not …
About 50% of the phosphorus can be removed in relatively low [OH¯] concentration (1.25 M), about 80% phosphorous removal was attained after further …
Phosphorous is an undesired element present in iron ore used in the steel making process. It leads to an increase in overall production cost as well as deteriorated steel quality. The desired phosphorus content in iron ores used in steel making is < 0.1%. Numerous beneficiation studies are mentioned in the literature; however, there is no …
Apatite concentrate is an important source of phosphate and contains significant amounts of rare earth elements (REEs). In this study, the possibility of selective phosphoric acid leaching of phosphate and calcium from the Esfordi (Yazd province, Iran) apatite concentrate, containing 16.3% phosphorus, 37.1% calcium, 2.9% iron and …
the phosphorus of iron concentrate and produce a sale apatite concentrate. ... the phosphorus removal from iron ores other than igneous formations has been a challenge for most of the iron ore ...
A series of methods have been proposed for enhancing iron extraction and phosphorus removal from high-phosphorus iron ore for the past few decades ... Amenability for processing of oolitic iron ore concentrate for phosphorus removal. Miner. Eng., 46 (2013), pp. 119-127, 10.1016/j.mineng.2013.03.028.
Biometallurgy is an option for the removal of phosphorus of iron ore, as there are many microorganisms, ... The composition of iron concentrate obtained: 64.12% Fe and 0.07% phosphorus with an iron recovery of 96.83%, and a rate of dephosphorization of 74.08%.
Phosphorus can be removed from iron ore by very different routes of treatment. The genesis of the reserve, the mineralogy, the cost …
The active adsorption agents for the removal of phosphorus are the nano iron oxides, but without a host media, i.e., the ion exchange resin, these nanoparticles would wash away and potentially ...
With the depleting reserves of high-grade iron ore in the world, froth flotation has become increasingly important to process intermediate- and low-grade iron ore in an attempt to meet the rapidly growing demand on the international market. In over half a century's practice in the iron ore industry, froth flotation has been established as an …
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