phosphorus in sponge iron

Determination of phosphorus in the presence of iron(III ...

Both manual and automated techniques have been developed for the determination of phosphorus in the presence of iron(III). Interference from iron(III) has been substantially eliminated by its reduction with hydroxyl-ammonium chloride prior to the formation of the molybdophosphate blue complex using ascorbic acid. T

phosphorus percent in spong iron ore

Sponge iron, also name as direct reduced iron (DRI), is the resulting product (with a metallization degree greater than 82 percent) of solid state reduction of iron ores or agglomerates (generally of high grade), the principal constituents of which are Metallic iron, residual iron oxides carbon and impurities such as phosphorus, sulphur and ...

Reduction Characteristics of High Phosphorus Iron Ore in ...

Representative technological samples of iron ore are collected from Eastern South Aswan iron ore mine in Egypt. The principal gangue contents are SiO2 7.76%, and P2O5 1.13%. Iron and phosphorus exist in the form of hematite 78% and apatite respectively. The ore was fired at 1000°C for 3 hours.

Removal of Phosphorous from Steel Produced by Melting ...

The main raw material for induction furnaces is steel scrap, cast iron and sponge iron. India is the only country where use of sponge iron contributes a large share in annual crude steel production. The amount of sponge iron in the charge mix varies from 0 to 90 % depending on its availability and economics of production.

Study of Phosphorus Removal by Using Sponge Iron ...

Phosphorus is one of the key elements causing lake eutrophication. This paper deals with phosphate removal by Sponge iron in batch and fixed-bed operation. Isotherm and kinetic studies are conducted. The isotherm data is described by the Freundlich and Langmuir model, while the kinetic data of adsorption is fitted by the pseudo-second-order kinetic model. The …

Melting behaviour of sponge iron in

Melting behaviour of sponge iron in induction furnace K.N. GUPTA, A.M. PANDE AND A. K. VAISFI National Metallurgical Laboratory, Jamshedpur-831007 Abstract Sponge iron with its consistency of composition, lower content of tramp elements and particularly low phosphorus and of sulphur has drawn the attention of

Adsorptive removal of phosphorus from aqueous solution ...

In this study, the phosphorus removal capacities of sponge iron and zeolite were evaluated and related to their physico-chemical characteristics. The potential mechanisms affecting the adsorptive removal of phosphorus from aqueous solutions onto sponge iron and zeolite were investigated in batch experiments.

Melting behaviour of sponge iron in induction furnace ...

Sponge iron with its consistency of composition, lower content of tramp elements and particularly low phosphorus and of sulphur has drawn the attention of medium/large scale foundries for producing quality steel castings. It is one of the alternative charge materials to scrap in induction furnaces. National Metallurgical Laboratory has made an attempt to melt sponge iron in …

SPONGE IRON – Lloyd's Metals

Sponge iron is also known as Direct Reduced Iron (DRI). Direct reduction, is an alternative route of iron making has been developed to overcome some of these difficulties of conventional blast furnaces. DRI is successfully manufactured through either gas or coal-based technology. Iron ore is reduced in solid state at 800-1050 c either by ...

Study of Phosphorus Removal by Using Sponge Iron ...

Phosphorus is one of the key elements causing lake eutrophication. This paper deals with phosphate removal by Sponge iron in batch and fixed-bed operation. Isotherm and kinetic studies are conducted.

Phosphorous Control in Induction Furnace Steel Melting ...

the steel, iron oxide (FeO) plays an important role in the bath. FeO helps to oxidise the impurities. In this experiment, this FeO is supplied through the addition of synthetic slag and sponge iron. Chemical Composition of Raw Materials . At first the chemical analysis of the steel scrap, DRI and synthetic slag were done.

Phosphorus recovery from waste activated sludge by …

As a novel phosphorus recovery product, vivianite (Fe 3 (PO 4) 2 ·8H 2 O) has attracted much attention due to its enormous recycling potential and foreseeable economic value. Taking sponge iron as seed material, the effect of different reaction conditions on the recovery of phosphorus in waste activated sludge by vivianite crystallization was studied.

APPARATUS AND METHOD FOR REMOVING NITROGEN …

An apparatus and a method for removing nitrogen and phosphorus from sewage by using sponge iron and activated sludge are disclosed herein. The apparatus comprises a raw tank, a pH adjusting tank, a primary SBBR reactor, a secondary SBBR reactor, an intermediate tank, and a discharge tank; by modification of sponge iron, preparation of composite filler, sludge …

Phosphorus - Low Concentration Removal - MetaMateria

Phosphorus is removed from capture site – will not re-contaminate water Phosphorus can be recovered PO4 Sponge Product PO4 Sponge products is made in different shapes and sizes and this provides flexibility for use of the product This highly porous material is made with iron powder and other minerals bonded together.

Effects of four different phosphorus-locking materials on ...

To lower phosphorus concentration in Xi'an moat, four different phosphorus-locking materials, namely, calcium nitrate, sponge-iron, fly ash, and silica alumina clay, were selected in this experiment to study their effects on water quality and sediment. Results of the continuous 68-day experiment sho …

THE EFFECT OF PHOSPHORUS ADDITIONS ON THE …

The preferred production method is to add phosphorus in the form of a fine Fe 3 P powder to iron powder. The mechanical properties of a number of sintered steels made with and without Fe 3 P additions to sponge iron or to high-purity atomized iron powders are reported. Use of atomized powder makes it possible to reach extremely high density by ...

IS 15774 (2007): Sponge Iron/Directed Reduced Iron (DRI ...

sponge iron, and is equal to the sum of free and combined carbon (as cementite). 3.8 Impurities — These are undesirable elements/ compounds in sponge iron, sulphur and phosphorus being the most common among them. 3.8.1 Gangue — It is the amount of other impurities present in sponge iron (resulting from the raw

Increasing Iron and Reducing Phosphorus Grades of …

iron ore concentrate with an iron grade of 67.54%, phosphorus content of 0.11%, and iron recovery of 78.99% were obtained under LIMS conditions that employed a grind of 95% 0.038 mm and a magnetic ﬁeld of 0.10 T. Optimized rougher reverse-ﬂotation conditions used a …

Adsorptive removal of phosphorus from aqueous solution ...

The adsorptive removal of phosphorus stabilized after an adsorption time of 4 h. The phosphorus removal efficiency of each substrate increased with increasing adsorption time. When the adsorption time was 4 h, the TP removal efficiencies for sponge iron and zeolite were 94.93% and 73.62%, respectively.

Phosphorus recovery from waste activated sludge by …

Taking sponge iron as seed material, the effect of different reaction conditions on the recovery of phosphorus in waste activated sludge by vivianite crystallization was studied. Through single factor tests, the optimal conditions for vivianite formation were in the pH range of 5.5–6.0 with Fe/P molar ratio of 1.5.

(PDF) Enhanced phosphorus removal by microbial ...

The phosphorus-locking efficiency of sponge-iron in overlying and interstitial water was >72 and 66 %, respectively. Meanwhile, the total phosphorus (TP), OP, …

All About Phosphate And The Kidneys - Healthy Kidney Inc.

Phosphorus is a common mineral found in high amounts in the bone. It is a mineral that combines with calcium to produce strong healthy bones. Besides, phosphorus is needed for many vital functions in almost all living cells. The levels of phosphorus are constantly regulated by the kidney because both low and high levels of phosphorus have a negative effect on health.

Enhanced phosphorus removal by microbial-collaborating ...

The chemical precipitation of Fe(III) is the main form of phosphorus removal. In addition, there exists adsorption phosphorus removal by phosphate-accumulating organisms. The mechanism of the enhanced phosphorus removal by microbial-collaborating sponge iron …

Phosphorus recovery from waste activated sludge by …

Phosphorus recovery from waste activated sludge by sponge iron seeded crystallization of vivianite and process optimization with response surface methodology Author: Guoding Wu, Wei Zeng, Shuaishuai Li, Ziyue Jia, Yongzhen Peng Source: Environmental science and pollution research 2021 v.28 no.41 pp. 58375-58386 ISSN: 0944-1344 Subject:

REMOVAL OF PHOSPHORUS THROUGH ROASTING OF …

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 …

Removing phosphorus from iron - National Research ...

Here, the gas will be slightly reducing to the charge at 1600° C. but in cooperation with the sponge iron will supply just enough oxygen to form just enough self-generated slag to mop up the phosphorus. Where the iron which contains the phosphorus contains exceptionally high carbon (e.g. 4%) or much silicon (e.g. 1%), these will compete for ...