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Dephosphorization of Steels IspatGuru

Aug 15, 2016Emulsification is caused maybe by deoxidation of the metal after P removal has taken place and the metal has become super-saturated with O2 by an unknown reason. The estimated surface area rapidly increases by over an order of magnitude during the beginning and intermediate periods of the reaction. Kinetics of phosphorus removal. Though P

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Phosphorus removal using steel slag ScienceDirect

Dec 01, 2006As a result, maximum removal of phosphorus was found when amount of steel slag added was equal to 7.5 g/L, which facilitated the removal of over 99% of the phosphorus, and the concentration of phosphorus remnant in the waste water was below 0.5mg/L, which was lower than the state standards for waste water discharge; therefore, the optimum added

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Cited by: 13

Removal of phosphorus from induction melted iron/steel

The rapid mixing of the slag with the steel during tapping completes the removal of phosphorus even while tapping is going on. The slag is then removed

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Thermodynamics of Phosphorus and Sulphur Removal during

Removal of impurity elements from hot metal is essential in basic oxygen steelmaking. Oxidation of phosphorus from hot metal has been studied by several authors since the early days of steelmaking. Influence of different parameters on the distribution of phosphorus, seen during the recent work of the authors, differs somewhat from that reported

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Cited by: 5

Production of low phosphorus steels from high phosphorus

scrap, hot metal dephosphorization, removal of phosphorus during steelmaking and post treatment of liquid steel, At Tata Steel, about 60-65% of the phosphorus input into blast furnaces comes through the iron-bearing raw materials and rest through coke.

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Efficient removal of phosphate from acidified urine using

Jan 31, 20201. Introduction. Phosphorus is well-recognized as the limiting nutrient for the growth and proliferation of algae,.Currently, the discharge of phosphorus-laden wastewater accelerates the worldwide eutrophication process, which can deteriorate water quality and cause comprehensive ecological crisis in relatively stagnant water bodies such as lakes and

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The chemistry of steelmaking. Acids and bases.

Calcium oxide also plays an important part in the Basic Oxygen Steelmaking furnace.Here it helps to remove impurities such as phosphorus and sulphur from the steel. Phosphorus is a non-metal and produces an acidic oxide, P 2 O 5.In the BOS furnace P 2 O 5 combines with the basic calcium oxide to make calcium phosphate. This forms part of a molten slag which collects on

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Protecting lakes, streams by removing phosphates as well

Sep 23, 2015A low-cost method of removing phosphates from tile drainage water has been developed, and may help protect lakes and streams. Using steel byproducts to trap phosphates in simulated tile drainage

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Phosphorus Treatment and Removal Technologies

removing phosphorus from domestic and industrial wastewater, many variations and combinations have been used. The following is intended to provide a basic overview of basic phosphorous removal processes. Chemical Treatment to Remove Phosphorus Chemical treatment for phosphorus removal involves the addition of metal salts to react

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Removal of phosphorus from induction melted iron/steel

The rapid mixing of the slag with the steel during tapping completes the removal of phosphorus even while tapping is going on. The slag is then removed

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Full article: Sulphur removal in ironmaking and oxygen

Mar 22, 2017This coke also produces the required heat by reacting with the available oxygen (from the hot blast and the FeO). The liquid hot metal (HM) that leaves the BF contains impurities, which have to be removed later in the process. In the HM pretreatment, usually most of the sulphur (and sometimes silicon and phosphorus as well) is removed.

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Removal of Phosphorus, Sulphur, and Arsenic from

In order to use this nickel for the production of stainless steel or nickel alloys, the phosphorus, sulphur and arsenic in the material must be removed. The aim of this project is to remove these impurities from the nickel-based alloy produced from recovery of spent catalyst without incurring a significant loss of other valuable elements.

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procedure in removal of sulphur and phosphorus from iron

Mechanism of phosphorus removal in beneficiation of high methods are found to be impracticable to remove phosphorus from the ore effectively. Better beneficiation index iron grade of 60.14% and a phosphorus content of 0.22% 13.18% with low ash and sulfur of 6.21% and 0.19%, respectively. More details ?

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(PDF) Processes for phosphorus removal from iron ore A

The review extends to the phosphorus removal processes of this mineral to meet the specifications of the steel industry. Phosphorus is a contaminant that can be hard to remove, especially when one

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Phosphorus in Steels IspatGuru

Sep 18, 2014P is added to the steel in the form of ferro-phosphorus (Fe-P), containing 23 % to 26 % P. Fe-P fines are usually briquetted, after using a binder. Fe-P is capable of oxidizing the residual silicon to silica, thus enabling it to float out to the ladle slag during steel making.

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(PDF) Thermodynamics of Phosphorus and Sulphur Removal

Removal of impurity elements from hot metal is essential in basic oxygen steelmaking. Oxidation of phosphorus from hot metal has been studied by

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AISI Electric Arc Furnace Steelmaking

Phosphorus and sulfur occur normally in the furnace charge in higher concentrations than are generally permitted in steel and must be removed. Unfortunately the conditions favorable for removing phosphorus are the opposite of those promoting the removal of sulfur.

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REMOVING PHOSPHORUS FROM SURFACE AND DRAINAGE

A method of constructing a phosphorous adsorbing structure includes creating a design model that indicates a percentage of phosphorous removed from a water supply per an amount of a predetermined adsorbent exposed to the water supply based upon an original concentration of phosphorous in the water supply and a retention time of water in the adsorbing structure.

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Steel Wikipedia

Steel is an alloy of iron with typically a few percent of carbon to improve its strength and fracture resistance compared to iron. Many other additional elements may be present or added. Stainless steels that are corrosion and oxidation resistant need typically an additional 11% chromium.Because of its high tensile strength and low cost, steel is used in buildings,

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Removal of Phosphorous from Steel Produced by Melting

Mar 22, 2013In secondary route of steelmaking, production through induction melting furnace contributes about 31 % of India’s total steel production. The main raw materials used are steel scrap, cast iron and sponge iron. In India, majority of the induction furnaces are operated using acidic lining of silica based ramming mass to produce structural steel where basicity cannot be maintained to remove

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Removing dissolved phosphorus from drainage ditch water

Removing dissolved phosphorus from drainage ditch water with phosphorus sorbing materials C.J. Penn, R.B. Bryant, P.J.A. Kleinman, and A.L. Allen Abstract: The loss of nutrients, particularly phosphorus (P), in agricultural drainage waters is a priority conservation concern. Open drainage ditches concentrate runoff and therefore

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EVE405- Chemical Phosphorus Removal YouTube

Mar 21, 2011Engineering Design Module on removing phosphorus from wastewater liquid treatment streams via chemical precipitation Cofloc coagulant vs metal based coagulant Duration: 2:17. MsFiona1965

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Removing dissolved phosphorus from drainage ditch water

Key words: drainage ditches-phosphorus removal structure-phosphorus sorbing materials-waterquality Removing dissolved phosphorus from drainage ditch water with phosphorus "slag" from the steel industry, "sludge" fi-om the stone industry, foundry sand from metal casting, and waste products from bauxite processing.

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Full article: Sulphur removal in ironmaking and oxygen

Mar 22, 2017This coke also produces the required heat by reacting with the available oxygen (from the hot blast and the FeO). The liquid hot metal (HM) that leaves the BF contains impurities, which have to be removed later in the process. In the HM pretreatment, usually most of the sulphur (and sometimes silicon and phosphorus as well) is removed.

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Removal Phosphorous from High Phosphorous Converter Steel

Removing phosphorus from high phosphorus converter steel slag by hydrometallurgical method was studied in this . The influence of different dephosphorizting agents on the effect of phosphorus slag was investigated, and high efficient dephosphorizating agent was found. The effects of reaction time, liquid to solid ratio, stirring speed, reaction temperature and

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Steel Wikipedia

Steel is an alloy of iron with typically a few percent of carbon to improve its strength and fracture resistance compared to iron. Many other additional elements may be present or added. Stainless steels that are corrosion and oxidation resistant need typically an additional 11% chromium.Because of its high tensile strength and low cost, steel is used in buildings,

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How to Remove Rust with Phosphoric Acid Hunker

Small areas of rust present an unattractive appearance on the surface of the metal object. If left untreated, the rust will spread until it actually forms a hole in the metal. One effective rust-removal solution is to use phosphoric acid in gel form to dissolve the corrosion.

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Phosphorus reduction in wastewater treatment

Jul 20, 2018A much simpler method of removing phosphorus can be carried out by dosing a metal-based coagulant into the wastewater. The metal targets phosphates via two routes: When a metal is added to wastewater it reacts directly with phosphates present in the wastewater, forming the metal phosphate, which is insoluble.

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Performance of Field-Scale Phosphorus Removal Structures

Phosphorus removal structures containing steel slag have shown success in treating surface runoff for dissolved P, but little is known about treating subsurface (tile) drainage. A ditch-style and subsurface P removal structure were constructed using steel slag in a bottom-up flow design for treating tile drainage.

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Removal of Phosphorous from Steel Produced by Melting

Mar 22, 2013In secondary route of steelmaking, production through induction melting furnace contributes about 31 % of India’s total steel production. The main raw materials used are steel scrap, cast iron and sponge iron. In India, majority of the induction furnaces are operated using acidic lining of silica based ramming mass to produce structural steel where basicity cannot be maintained to remove

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Phosphorus removal: How low can you go? WWT

A second trial was then set up to focus on steel slag, investigating its vertical and horizontal capacity for phosphorus removal. Reed beds also create a circular economy as the phosphorus-enriched steel slag can then be sold on as a fertiliser. Another option is sand filtration using ferric salts. Anglian Water is currently carrying out a 12

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Phosphorous removal from wastewater Lenntech

Controlling phosphorous discharged from municipal and industrial wastewater treatment plants is a key factor in preventing eutrophication of surface waters. Phosphorous is one of the major nutrients contributing in the increased eutrophication of lakes and natural waters. Its presence causes many water quality problems including increased purification costs, decreased

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Removing dissolved phosphorus from drainage ditch water

Key words: drainage ditches-phosphorus removal structure-phosphorus sorbing materials-waterquality Removing dissolved phosphorus from drainage ditch water with phosphorus "slag" from the steel industry, "sludge" fi-om the stone industry, foundry sand from metal casting, and waste products from bauxite processing.

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Effect of Phosphorus on the Properties of Carbon Steels

Phosphorus in steel can have beneficial as well as harmful effects. Phosphorus is one of the most potent solid-solution strengtheners of ferrite. The addition of only 0.17% phosphorus increases both the yield and tensile strength of low-carbon sheet steel by about 62 MPa (9 ksi) while also improving the bake hardening response and deep drawability.

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Steel-making processes Materials Database

In the basic processes, silicon, manganese, carbon, phosphorus and sulphur can be removed from the charge, but normally the raw material contains low silicon and high phosphorus contents. To remove the phosphorus the bath of metal must be oxidised to a greater extent than in the corresponding acid process, and the final quality of the steel

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Introduction to Wastewater Phosphate Removal Options

The major downside to chemical precipitation is the increased volumes of sludge and metal salts in the sludge. Constructed Wetlands Another option for phosphorus removal, that most mimics natural processes, is to construct wetlands that act as a biofilter to remove trace organics, nutrients, and solids before final discharge.

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Phosphorus Removal from Waste Waters Using Basic Oxygen

Few studies have characterized reactive media for phosphorus (P) removal in passive treatment systems in terms of both batch and continuous flow experiments. This study uses basic oxygen steel slag (BOS) from a U.K. feedstock. Batch experiments demonstrated the effective removal of phosphorus with varying initial pH, initial P concentration, clast size, and ionic strength to

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