slag crushing phosphorous

Properties and Uses of Steelmaking Slag – IspatGuru

The processing of the steelmaking slag (Fig 1) is normally carried out by (i) solidifying and cooling of the hot liquid slag, (ii) crushing and magnetic separation treatment of the slag to recover the scrap, (iii) crushing and classification of the slag for grain size adjustment to manufacture the slag product, and (iv) aging treatment of the ...

Predicting Phosphorus Sorption onto Steel Slag Using a ...

Reducing phosphorus (P) loads from soils to surface waters is necessary for solving the problem of eutrophication. Many industrial by-products have been shown to sorb appreciable amounts of dissolved P from solution and it has been proposed to use P sorption materials (PSMs) such as steel slag in landscape scale "filters" for trapping dissolved P in runoff.

Slag crushing & processing- Mining and Rock Technology

Slag crushing & processing. Slag is discharged during steelmaking, usually dark and dark brown. By steelmaking furnace slag can be divided into flat slag, electric furnace slag, Slag is mainly content calcium, iron, silicon, magnesium and a small amount of aluminum, manganese, phosphorus …

EPA - Identification and Description of Mineral Processing ...

ELEMENTAL PHOSPHORUS A. Commodity Summary Phosphorus is the twelfth most abundant element, almost all of which occurs as salts of phosphoric acid. ... Slag Pit Crushing Primary Condensers Secondary Condensers P4 Sumps P4 Storage FMC FMC Plants Screening Slag Tank Farm Lawrence, KS Newark, CA Green River, WY Carteret, NJ Nitro, WV .

UG-Mat Nonferrous Slags | Recycled Materials Resource Center

Phosphorus Slag Gradation: Air-cooled phosphorus slag can readily satisfy the AASHTO M145 (11) gradation and physical requirements for embankment aggregates. Unit Weight: The unit weight of crushed air-cooled phosphorus slag ranges from 1360 to 1440 kg/m 3 (85 to 90 lb/ft 3).

(PDF) PSP-BOF – Removal of phosphorus from BOF slag

The project seeks to develop new treatment processes to remove phosphorus (P) from BOF-slag. The aim is to produce a P rich slag fertiliser fraction and a Fe rich raw material fraction for ironmaking.

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 represent ...

A Kinetic Study on Selective Leaching of Phosphorus from ...

Abstract Phosphorus recovery from dephosphorization slag generated during steelmaking has enormous potential to secure a stable supply of phosphate. Because P and Fe in slag are concentrated in different mineral phases, P can be …

Phosphorus Slag | Scientific.Net

Grinding phosphorous slag and steel slag with different water content, the initial set time of phosphorus slag cement for 6 hours has reduced to 2.5 hours without changing the strength. Ageing the mixed grinding power of phosphorous slag and steel slag and keeping 2.5 hours of the initial set time, the early cement strength can increase 3 MPa.

Slag crushing - Outotec

Slag often contains valuable metals that can still be recovered and utilized. When crushed and sized properly, slag can be sold and used as valuable material in many different ways, for example, as aggregates. However, since slag usually contains uncrushable objects, it is typically considered a challenging feed material for conventional jaw ...

Andy Crush - Academia.edu

Several techniques were performed to expose fresh surface sites on the slag, including: (1) drying; (2) agitation; and (3) crushing of the slag granules. Crushing resulted in the best regeneration of P removal efficiency by the slag, however, after just 2 months the renewed P removal efficiency of the crushed slag fell back to a similar level ...

Mineral Sludge Production : Seablock

There are also a couple of mineral sludge recipes using mineralised water, crystal slurry and thermal water. There's no way to make the slag to slurry process more efficient, but if you are also using Madclown's Processing then you can turn 20 crushed stone into 7 slag and 1 phosphorous ore, which is more efficient than using the crushed stone to slurry recipe.

Efficiencies and mechanisms of steel slag with ferric ...

The current study aimed to investigate the efficiencies and mechanisms of slag filter media for removing phosphorus from synthetic wastewater. The steel slag with high ferric oxides (Fe2O3) was subjected for the electric arc furnace (EAF) and selected as the filter media (HFe). The chemical characteristics of HFe were determined using pH, point of zero charge (PZC) and XRF. The phosphorus ...

the phosphorous issue at the Agbaja iron ore project in ...

• Phosphorus bearing minerals include apatite and a crandallitegroup mineral. Preliminary Investigations • 2012-2014 Semi Traditional Approach to produce Magnetite concentrate – Crushing, Screening, Milling, Magnetic Separation, Bioleaching (VATs), filtration and shipping ... and slag‐to‐metal ratios higher thus necessitating frequent ...

SLAG CRUSHING & PROCESSING | Stone Crusher And Mill

SLAG CRUSHING & PROCESSING. Slag is discharged during steelmaking, usually dark and dark brown. By steelmaking furnace slag can be divided into flat slag, electric furnace slag, Slag is mainly content calcium, iron, silicon, magnesium and a small amount of aluminum, manganese, phosphorus and other oxides.

JP2010270378A - Method for recovering phosphorus from ...

phosphorus acid water steelmaking slag slag Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Pending Application number JP2009124709A Other languages Japanese (ja) Inventor Akiko ...

Alkali-Activated Phosphorous Slag Performance under ...

In this paper, the impact of curing parameters such as precuring time, curing time, and temperature on compressive strength of mortar with phosphorous-slag cement activated with two different compound activators including NaOH + Na 2 CO 3 and Na 2 CO 3 + Ca (OH) 2, as well as the microstructure morphology of the hardened mortars, are studied.Furthermore, variance analysis is …

Feasibility Study of Dephosphorization of Slag Generated ...

The cooled slag was then crushed, milled and separated by wet magnetic separation method. Since the magnetic properties differ for different phases, it is possible to separate each phase with the aid of magnetic separation. By applying magnetic field to the crushed slag sample, phosphorus lean and rich phases may be notably separated.

Phosphorus Slag - an overview | ScienceDirect Topics

Two main types of phosphorus slag can be produced: air-cooled and granulated phosphorus slags. The air-cooled phosphorus slag does not have cementitious properties and can be crushed and used as an aggregate. Conversely, the glass content of granulated phosphorus slag can be up to 98% as a consequence of the high viscosity of the molten slag.

Elemental Phosphorous Calciner 7439976 Mercury 50100106 Mass Burn Rotary Waterwall Combustor 7440020 Nickel 30901201 Precious Metals Recovery Reclamation Furnace 7440360 Antimony ... Slag Crushing and Sizing 30501090 Haul Roads: General 30103551 Ore Dryer 30501009 Raw Coal Storage 30302350 Grate/Kiln Furnace Discharge 39000399 30402001

US4000071A - Apparatus for separating phosphorus furnace ...

Phosphorus furnace slag and ferrophosphorus are separated from one another. To this end, a mixture of phosphorus furnace slag and ferrophosphorus, which is tapped off periodically from a phosphorus furnace, is introduced into a separating zone fitted with a bottom outlet and an overflow, through which the phosphorus furnace slag floating on the ferrophosphorus is delivered to a solidification ...

An overview of utilization of slag and sludge from steel ...

Integrated steel plants utilize mostly five materials such as raw materials, air, water, fuel and power to produce steel. During the production of steel, 2–4 t of wastes are being generated per tonne of steel produced.The various solid wastes in the form of slags and sludges that are emerged from steel plants are blast furnace slag, blast furnace flue dust and sludge, Linz–Donawitz (LD ...

Evaluation of Bituminous Concrete Mixture Properties with ...

1. The properties of steel slag are found to be in compliance as per the specification which is same as for the crushed aggregates. 2. The optimum bitumen content was reduced when 12.5mm down steel slag was used in the mix because of more bulk density and less voids.

Environmental effects and aspects of LD slag

LD slag or steel slag, a by-product of the steel making process is one of the important waste materials generated in steel plants. The presence of phosphorous in it is quite high which restricts its utilisation in iron and steelmaking directly. The amount of phosphorus can, however, be reduced by physical and chemical means.

A Kinetic Study on Selective Leaching of Phosphorus from ...

Abstract Phosphorus recovery from dephosphorization slag generated during steelmaking has enormous potential to secure a stable supply of phosphate. Because P and Fe in slag are concentrated in different mineral phases, P can be recovered by separation of the P-bearing phase, and the residue can be reutilized in steel plant at the same time. In the present study, we adopted …

Sustainable Approaches for LD Slag Waste Management in ...

The additive acts as nuclei for crystallization of dicalcium silicate in the slag, and the breaking of slag produces 65–80% slag and 10–15% chips . It was also reported that the most harmful components in LD slag are phosphorus and sulfur, which are to be removed before use either in the sintering plant or the blast furnace.

Sustainable Approaches for LD Slag Waste Management in ...

12%The additive acts as nuclei for crystallization of dicalcium silicate in the slag, and the breaking of slag produces 65–80% slag and 10–15% chips . It was also reported that the most harmful components in LD slag are phosphorus and sulfur, which are to be removed before use either in the sintering plant or the blast furnace.

(PDF) Assessment of physical techniques to regenerate ...

The crushed slag trial appears to indicate that the removal of phosphorus by the slag is dependant on the reaction with the surface of the media and that the internal bulk of the slag does not participate in the P adsorption. Because the slag granules are porous, the bulk of their surfaces has already been in contact with effluent prior to ...

Additional AWS Info - Harbert's Products, Inc.

The objective of this testing was to classify the recycled slag as an F7 A2-EM12 K, which means the testing of the coupon welded with the recycled slag will produce weld metal with an as­welded tensile strength no lower than 70,000 psi (480 MPa) and Charpy V­-notch impact strength of at least 20 ft-lb (27 J) at -20°F (-29°( ) when produced with an EMl 2K electrode under the con­ditions ...

Model of Phosphorus Precipitation and Crystal Formation in ...

The objective of this study was to develop a phosphorus retention mechanisms model based on precipitation and crystallization in electric arc furnace slag filters. Three slag columns were fed during 30 to 630 days with a reconstituted mining effluent at different void hydraulic retention times. Precipitates formed in columns were characterized by X-ray diffraction and transmission electronic ...

The removal of phosphorus and boron by slag and acid ...

phosphorous and boron is close to one [12-13], and that of calcium is far less than one. Generally speaking, during the cooling of MG-Si, the phosphorous and boron are almost not precipitated in the grain boundary, because of they segregation coefficient. Accounting to the action of slag, some of the phosphorous (or boron) dissolved in slag, the

Treatment of Yellow Phosphorus Slag and Reuse of It as an ...

Yellow phosphorus is used widely in the world for production of phosphoric acid, various phosphates, flame retardant, detergent, water treatment, metal surface treatment, etc. After the production of yellow phosphorus, a large amount of phosphorus sludge is discharged to environment, causing environment pollution. This work focused on treatment of yellow phosphorus slag (YPS) …

Basics of slag production - Article on the slag industry ...

The key to phosphorus removal is a lime-rich slag, achieved by addition of a calculated weight of lime to each heat in the furnace. This is an area of technical trade-offs: coarse lime takes longer to dissolve into the slag and begin the removal of phosphorus but with finer lime there would be excessive dust losses.

EFFECTS OF FINENESS AND CONTENT OF PHOSPHORUS SLAG …

The utilization of phosphorus slag (PHS) to replace the fly ash in the construction of hydraulic projects has attracted a growing attention in China. In this study, the influence of PHS fineness and content on cement hydration, mechanical strength, permeability as well as the pore structure and fractal dimension ( D s ) of concrete have been ...

White phosphorus is terrifying - YouTube

Check out my main channel: https:// while ago, I was able to get some chunks of white ph...

Applications of Steel Slag Powder and Steel Slag Aggregate ...

The applications of steel slag powder and steel slag aggregate in ultra-high performance concrete (UHPC) were investigated by determining the fluidity, nonevaporable water content, and pore structure of paste and the compressive strength of concrete and by observing the morphologies of hardened paste and the concrete fracture surface. The results show that the fluidity …