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Enhancement of phosphorus removal with near .

01-10-2016· The objective of this study was to enhance phosphorus (P) removal while achieving near-neutral pH in aqueous solution utilizing steel slags (Blast furnace slag, BFS; Basic oxygen furnace slag-air cooling, BOFS-A; Basic oxygen furnace slag-rapid cooling, BOFS-R) and ferronickel slag (FNS) for application to constructed wetlands (CWs).

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Steel Slag - an overview | ScienceDirect Topics

Steel slag can also be produced by smelting iron ore in a basic oxygen furnace. According to methods for cooling molten steel slag, steel slag is classified into five types: natural air-cooling steel slag, water-spray steel slag, water-quenching steel slag, air-quenching steel slag, and shallow box chilling steel slag .

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Steelmaking Slag – IspatGuru

This method is a low cost technology for pollutions treatment, which slag performs an important role in absorbing impurities especially phosphorus. By comparing most of industrial by-products, steelmaking slag is a low-cost and abundant material, which its combination with small secondary treatment systems (such as constructed wetlands) is preferred in compared to the others methods.

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Optimizing Chemical Phosphorus Removal

– Mixing method – Wastewater characteristics • Colloids and solids effect P-metal ... Gu, et al. (ongoing) Phosphorus Speciation and Removal in Advanced Wastewater Treatment, WERF Report . P fractions at Plant N 0.0 0.5 1.0 1.5 2.0 2.5 3.0 BNR INF BNR Chemical P removal Mono/Dual media Filtration /L) pOP pAHP ... • Good mixing and ...

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METHOD FOR RECLAIMING IRON AND .

02-11-2011· The invention provides a method for recovering (collecting) iron and phosphorus from steelmaking slag, which includes a first step in which phosphorus-containing steelmaking slag such as dephosphorization slag is reduced using a reducing agent containing for example carbon, Si or Al to reduce iron oxide and phosphorus oxide in the slag and to recover them as phosphorus-containing .

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Resurrection of the Iron and Phosphorus Resource .

The reduction of steelmaking slag is a simple measure to separate phosphorus from slag, but the feasible method to extract phosphorus from the high-P 2 O 5 -containing hot metal is not established

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Analysis of Cr with Various Valence States in Industrial ...

Analysis of Cr with Various Valence States in Industrial EAF Slag for Making Stainless ... This study would provide an experimental method and ... recycling process to making good use of the slag.

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What Is The Typical Converter Slag Blocking .

The slag tapping of the converter can effectively control the amount of slag under the ladle, reduce the return of phosphorus from the steel slag, reduce the consumption of deoxidized aluminum, reduce the cost of converter smelting, and achieve good metallurgical effects.

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Dephosphorization of Steels – IspatGuru

Phosphorus refining in BOF process. A good steelmaker is also a good slag maker' is a popular saying amongst the steelmaking personnel and is very relevant in the context of BOF process. Having a good control over slag formation and composition enables optimum refining and minimizes the risk of having to reblow the O2 or to make extra ...

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WO2010074309A1 - Method for reclaiming iron .

Disclosed is a method for reclaiming iron and phosphorus from steelmaking slag, which comprises a first process, in which steelmaking slag that contains phosphorous, such as dephosphorization slag, is reduction treated using a reducing agent, such as carbon, Si, or Al, to reduce and recover iron oxides and phosphorus oxides in the slag as phosphorus-containing molten steel, a second process ...

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An overview of utilization of slag and sludge from .

01-03-2007· The other methods such as magnetic separation, classification were met with limited success with respect to the removal of phosphorus from LD slag (Das et al., 2002b). Different methods other than physical beneficiation studies such as smelting by induced furnace and plasma smelting studies were carried out to remove the phosphorus content from LD slag.

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Steelmaking Slag – IspatGuru

This method is a low cost technology for pollutions treatment, which slag performs an important role in absorbing impurities especially phosphorus. By comparing most of industrial by-products, steelmaking slag is a low-cost and abundant material, which its combination with small secondary treatment systems (such as constructed wetlands) is preferred in compared to the others methods.

Get Price

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.

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Welding Electrode: Chart and Selection - Weld Guru

06-07-2020· Phosphorus causes grain growth, brittleness, and "cold shortness" (i. e., brittle when below red heat) in the weld. These defects increase in magnitude as the carbon content of the steel increases. Sulfur acts as a slag, breaks up the soundness of the weld metal, and causes "hot shortness" (i. e., brittle when above red heat).

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EP2383352A1 - Method for reclaiming iron and .

The invention provides a method for recovering (collecting) iron and phosphorus from steelmaking slag, which includes a first step in which phosphorus-containing steelmaking slag such as dephosphorization slag is reduced using a reducing agent containing for example carbon, Si or Al to reduce iron oxide and phosphorus oxide in the slag and to recover them as phosphorus-containing molten iron ...

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Phosphorus removal performance and speciation .

15-12-2015· Argon oxygen decarburisation (AOD) slag may be used for phosphorus (P) removal, as its high pH and weatherable calcium (Ca) minerals provide sufficient Ca 2+ and OH − for calcium phosphate (Ca–PO 4) precipitation.This study examined the P removal performance of AOD slag for use as wastewater treatment material.

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Determination of Phosphorus in Soil by ICP-OES .

In this study, an improved standard addition method (ISAM) was developed for the determination of phosphorus in soil by ICP-OES based on the conventional standard addition method (CSAM) and calibration curve method (CCM). Certified standard soils were analyzed by the proposed ISAM method. The values obtained by ISAM method agreed with the certified values.

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What Is The Typical Converter Slag Blocking .

The slag tapping of the converter can effectively control the amount of slag under the ladle, reduce the return of phosphorus from the steel slag, reduce the consumption of deoxidized aluminum, reduce the cost of converter smelting, and achieve good metallurgical effects.

Get Price

Welding Electrode: Chart and Selection - Weld Guru

06-07-2020· Phosphorus causes grain growth, brittleness, and "cold shortness" (i. e., brittle when below red heat) in the weld. These defects increase in magnitude as the carbon content of the steel increases. Sulfur acts as a slag, breaks up the soundness of the weld metal, and causes "hot shortness" (i. e., brittle when above red heat).

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Growth of phosphorus concentrating phase in .

Request PDF | Growth of phosphorus concentrating phase in modified steelmaking slags | Recycling steel slag to metallurgical process requires removing phosphorus from slag. In this paper ...

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METHOD FOR RECLAIMING IRON AND .

31-10-2018· METHOD FOR RECLAIMING IRON AND PHOSPHORUS FROM STEELMAKING SLAG . European Patent EP2383352 ... SUITO AND TOKUDA: "Thermodynamic Analysis of Slag Recycling Using a Slag Regenerator", ISIJ INTERNATIONAL, vol. 35, no. 9, 1995, pages 1079-1088, XP002677785, ...

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Why phosphorous is important

All manures contain phosphorus, and manure from grain-fed animals is a particularly good source. For this reason it is advisable to leave manure from grazing animals where the animals have grazed. Steel slag Phosphorus is available in slag from steelmaking in Europe, but there are no commercially available forms. Phosphorus in the soil

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Phosphorus Slag | Scientific.Net

Abstract: The Na 2 O-CaO-SiO 2-MgO-Al 2 O 3-ZnO glass-ceramics was prepared from the phosphorus slag as main primary raw materials by melt quenching technique.The effects of K 2 O and Al 2 O 3 on crystallization behavior and structure of glass-ceramics were investigated by DSC, XRD and SEM. It is shown that the main crystalline phase is combeite (Na 4 Ca 4 (Si 6 O 18)) in glass-ceramics.

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An overview of utilization of slag and sludge from .

01-03-2007· The other methods such as magnetic separation, classification were met with limited success with respect to the removal of phosphorus from LD slag (Das et al., 2002b). Different methods other than physical beneficiation studies such as smelting by induced furnace and plasma smelting studies were carried out to remove the phosphorus content from LD slag.

Get Price

KR101359797B1 - Method for reclaiming iron and .

A first step of reducing and recovering the steel-making slag containing phosphorus such as dephosphorized slag by using a reducing agent such as carbon, Si, Al, and reducing and recovering the iron oxide and phosphorus oxide in the slag as phosphorus-containing molten iron; And a second step of recycling the produced sintered ore to the blast furnace using the steelmaking slag from which the ...

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Analysis of Cr with Various Valence States in Industrial ...

Analysis of Cr with Various Valence States in Industrial EAF Slag for Making Stainless ... This study would provide an experimental method and ... recycling process to making good use of the slag.

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Phosphorus in Steels – IspatGuru

Phosphorus in Steels. satyendra; September 18, 2014; 0 Comments ; corrosion resistance, galvanized, Phosphorus, steel, strength, zinc, Phosphorus in Steels Phosphorus (P) (atomic number 15 and atomic weight 30.974) has density of 1.82 gm/cc. It has a melting point of 44.1 deg C and boiling point of 280 deg C. The iron (Fe) – P phase diagram ...

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Granulated Blast Furnace Slag - an overview ...

Granulated phosphorus slag is a latent cementitious material but less reactive than granulated blast-furnace slag at early age due to the lower Al 2 O 3 content and the presence of P 2 O 5 and F. A hydraulic index of phosphorus slag is defined as follows (Shi et al., 2006; RCT 5024-83, 1983):

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Enhancement of phosphorus removal with near .

01-10-2016· The objective of this study was to enhance phosphorus (P) removal while achieving near-neutral pH in aqueous solution utilizing steel slags (Blast furnace slag, BFS; Basic oxygen furnace slag-air cooling, BOFS-A; Basic oxygen furnace slag-rapid cooling, BOFS-R) and ferronickel slag (FNS) for application to constructed wetlands (CWs).

Get Price

Steel Slag - an overview | ScienceDirect Topics

Steel slag can also be produced by smelting iron ore in a basic oxygen furnace. According to methods for cooling molten steel slag, steel slag is classified into five types: natural air-cooling steel slag, water-spray steel slag, water-quenching steel slag, air-quenching steel slag, and shallow box chilling steel slag .

Get Price