1. Introduction. Australia's iron ore industry is undergoing a major transformation. Reserves of traditional high-grade ores are becoming depleted while the replacement ore types are lower in grade and sometimes require beneficiation to remove or minimise contaminants such as alumina, silica and phosphorus (Dukino et al., 2000).The phosphorus content of Australian iron ores is a particularly ...
This paper presents a model derived for quantitative evaluation and prediction of the concentration of phosphorus removed during pyro-hydro beneficiation of iron oxide ore. Potassium hydroxide was used as the leaching solution and the reaction vessel containing the solution and ore was heated at a temperature of 600℃ for 10 minutes. The results of the investigation indicates that the model ...
Removal results of above 90% and less than 0.05% residual phosphorus are noticed, which is the maximum value required in most of the products generated in the processing of iron ore. Key words: iron ore; phosphorus removal
The possibility of phosphorus removal from high phosphorus iron ore using combined microwave pretreatment and ultrasonic treatment was studied. The results indicated that microwave pretreatment significantly increases the efficiency of ultrasonic disintegration and the removal of gangues.
Phosphorus Removal From Iron Ore. Redalyc.Processes for phosphorus removal from iron ore - a review.2.2 extraction processes.2.2.1 chemical processes.Acid leaching has been considered as an alternative to flotation for remov- ing phosphorus from iron ore.Get price.Full text of the blast furnace and the manufacture of pig iron.
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.
Removal of phosphorus from induction melted iron/steel ... Naturally there came about a shortage of iron ore and especially low phosphorus iron ore. The issue of phosphorus has bedevilled the ...
REMOVAL OF PHOSPHORUS THROUGH ROASTING OF OOLITIC IRON ORE WITH ALKALINE EARTH ADDITIVES . K Ionkov. 1, S Gaydardzhiev. 2, D Bastin. 3, A Correa de Araujo. 4. and M Lacoste. 5. ABSTRACT . The present study is devoted to improvement of the leaching efficiency during phosphorous removal from high phosphorous gravity-magnetic concentrate.
Laboratory Studies on Phosphorus Removal from Nigeria''s . The investigation into whether or not Bacillus subtilis can remove phosphorus from the Nigerian Agbaja iron ore was carried out with careful monitoring of the population of the removing agent as well as pH of the system. 1.00mm/0.50mm, 0.50mm/0.25mm, and 0.25mm/0.125mm ore fractions obtained from sieving of the crushed iron ore …
The aim of this work is to take an empirical analysis of iron extraction based on phosphorus removal and leaching time of iron ore in hydrogen peroxide solution. Phosphorus present in the iron ore is locked up with the ore and so during leaching of the iron ore, as phosphorus is being oxidized by oxygen (from hydrogen peroxide) and removed with ...
Heating at higher temperatures, up to 500°C, with heating times of 0.5 h to 4 h, gave no improvement in phosphorus removal.Similar phosphorus removal was achieved by heating the ore at 300-350°C ...
mass-input of the iron oxide ore and ore mineralogy etc. A model has been derived for predictive analysis of the concentration of phosphorus removed during leaching of iron oxide ore in sulphuric acid solution [4]. The work indicated that phosphorus removal from the iron oxide oreas obtained from periment and derived model is dependent on
Examples of Different Substrates Used for Phosphorus Removal . ..... and Kern 2001; Sakadevan and Bavor 1998) and is an industrial by-product of iron ore. Get Price Lecture 33 Biobeneficiation Of Industrial Minerals - nptel
The leaching kinetics of high-phosphorus iron ores in HCl solution was investigated. The effects of temperature ranging from 27°C to 50°C, particle size from 0.18-1.25 mm and HCl concentration from 0.5 to 3.5 mol·L-1 on the leaching efficiency of phosphorus were determined. The dissolution rates are significantly influenced by the temperature and concentration of acid solutions.
Phosphorus associated with the goethite in high-phosphorus iron ores can be removed to 0.075% P using a heat treatment at 300–350°C for 1 h with 10 wt% NaOH, followed by a water leach. Heating at higher temperatures, up to 500°C, with heating times of 0.5 h to 4 h, gave no improvement in phosphorus removal.
12/1/2006· The results show that phosphorus occurring as apatite phase could be removed by alkali-leaching, but those occurring in the iron phase could not. Sulfuric acid is the most effective among the three kinds of acid. 91.61% phosphorus removal was attained with 1% sulfuric acid after leaching for 20 min at room temperature.
control in iron ore flotation circuits and the level of ionic strength in iron ore flotation pulp. The presence of calcium and magnesium is particularly detrimental to kaolinite removal from iron ore[32]. For dispersant-kaolinite interactions, it was found that sodium silicate, a standard dispersant widely used in iron ore flotation for silicate
to have a low phosphorus level in the iron ore since it can affect the quality of the steel produced.1) While methods for removing phosphorus from molten iron exist,2) a number of factors such as financial penalties and market access make it attractive to ensure that phosphorus is removed from the iron ore prior to its use in smelting.
briquettes, and molten iron containing 0.78% phosphorus and 0.91% silicon from optimally reduced ore–coal briquettes. The study indicates that carbonaceous materials with high CO2 reactivity are suitable for use in the FASTMELT process for phosphorus removal and iron recovery from oolitic high-phosphorus haematite. A> =<*8
8/14/2008· Phosphorus removal from reject water could be an effective way to decrease phosphorus loads entering the aeration tank. An innovative approach involves the replacement of iron salts, which are commonly used for phosphorus removal, with ferrous ions produced by iron‐reducing bacteria from iron ore.
Comparative phosphorus removal capability of a microbial fungus-Aspergillus terreus and a bacterium-Bacillus subtilis from Nigeria's Agbaja iron ore was investigated. Manual crushing and sieving of the iron ore in Shital Test Kits produced 5 grain size distributions namely: ≥1.0mm, 1.0mm/0.50mm, 0.50mm/0.25mm, 0.25mm/0.125mm, 0.125mm/0.00mm, from which the first and last grain sizes were ...
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.
The removal of phosphorus from iron ore by leaching with hydrometallurgical method for the removal of phosphorus from iron ore is presentedhe apatite content 1 of a swedish ore is removed 95 by leaching the ore with nitric acidhe iron loss is less than 0 while the alkali metal content is …
With the depletion of high grade iron ore, the removal of alumina containing minerals and phosphorous from low grade iron ore has received increasing attention in iron ore industry. The flotation behaviour of kaolinite was found to be opposite to that of quartz and special care has to be taken for the successful removal of the clay mineral.
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 ...
phosphorus removal from iron ore by magnetic separation or …. Posts Related to phosphorus removal from iron ore by magnetic separation or gravity separation. … separators to remove the high concentration of magnetite …. Click & Chat Now
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 ...
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.