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Recycling of ladle furnace slags Abstract Ferrous industry slag is waste product of all steelmaking manufactures. These materials should be reused or stocked. There is abundant literature on the subject of reuse and recycling of blast furnace(BF), basic oxygen furnace(BOF), electric arc furnace(EAF).
Dec 01, 2019· Hello everyone. BLAST FURNACE The blast furnace is a countercurrent gas/solids reactor in which the descending column of burden materials [coke, iron ore and fluxes/additives] reacts with the ascending hot gases. The process is continuous with ra...
At the base of the furnace are two exits. The slightly higher located one is to extract the waste product, the slag. This flows into a slag ladle for further transport. Slag is often used for driveways. The lower located exit is used for the molten iron which flows to the torpedo wagon. It is then transported to an iron mill for further processing.
The liquid hot metal and slag are tapped from the blast furnace intermittently or continuously depending on the size of the furnace. Hot metal is tapped into a torpedo car which is transported by rail to the hot metal pretreatment station, and the blast furnace slag is tapped into a slag ladle which is transported by trucks to a slag pit.
Jan 15, 2016· Molten steel is transferred from the blast furnace to specific locations using "torpedo" cars which typically hold about 300 tonnes of liquid steel. A ladle is then placed underneath, the torpedo ...
definition applies to smelting operations and primary steelmaking operations (blast furnace or ferrochrome smelting). In the blast furnace slag originates from the gangue in the ore, ash in the coal, and the fluxes (lime, doloma, Al2O3) that were added to melt the gangue and coal ash so that the slag can be tapped from the blast furnace.
refractory materials Common types of ladle refractories: (1) Clay refractory brick, clay brick A12O3 content is generally between 30% 50%, the price is low. Mainly used for ladle permanent layer and ladle bottom. (2) high alumina brick. Brick A12...
Molten pig iron (sometimes referred to as "hot metal") from a blast furnace is poured into a large refractorylined container called a ladle. The metal in the ladle is sent directly for basic oxygen steelmaking or to a pretreatment stage.
Ladle furnace basic slag (ladle slag, LS) is a byproduct of the steel refining process. There is a great amount of LS generated worldwide every year and the current solution is simply landfilling ...
While most of the furnace slag is recycled for use as an aggregate, excess steel slag from other operations (raker, ladle, clean out, or pit slag) is usually sent to landfills for disposal. MARKET SOURCES. Steel slag can normally be obtained from slag processors who collect the slag .
May 06, 2016· Description
Furnace vessel shell distortion and destruction during a long campaign must be overcome with use of improved alloys. Slag entrainment or carryover from furnace to ladle, a key to clean steel, should be controlled using electromagnetic sensors, IR camera systems and other currently available techniques.
Blast furnace slag is recovered by melting separation from blast furnaces that produce molten pig iron. It consists of nonferrous components contained in the iron ore together with limestone as an auxiliary materials and ash from coke. Approximately 290 kg of slag is generated for each ton of pig iron.
Except for heating ladle furnace is an excellent place to make desulfurization with slag, Catreatment, and other alloying and trimming additions. The process outline from converter to ladle furnace, vacuum treatment, and casting is presented in Figure
A promising type of steel slag for applications is the ladle furnace (LF) slag, which is also known as the basic slag, the reducing slag, the white slag, and the secondary refining slag. The LF slag is a byproduct from further refining molten steel after coming out of a basic oxygen furnace (BOF) or an electric arc furnace (EAF). The use of the LF slag in further applications requires ...
In the Furnace Hot Metal, (along with slag) is processed from the raw material which gets collected in the hearth and blast furnace gases come out of blast furnace from the top. ii) Cast House: In the Cast House Hot Metal, slag are tapped from the Furnace tap hole and Hot metal and slag are separated in the refractory lined main iron trough.
Steel Ladle Refractory Solutions. HarbisonWalker International is one of the largest domestic manufacturers of steel ladle refractories. Our steel ladle refractory solutions are customized based on shopspecific conditions to optimize refractory performance and improve safety, refractory life and yield.
504 slag ladle products are offered for sale by suppliers on, of which utensils accounts for 1%. A wide variety of slag ladle options are available to you, such as stainless steel. You can also choose from stocked slag ladle, as well as from ce / eu, ciq slag ladle, and whether slag ladle is metal.
In order to make a complete characterization of ladle furnace slag (LF slag, LFS), as nonhazardous industrial waste, and to solve its permanent disposal and/or recovery, bearing in mind both the ...
Slag removal. Keeping furnace slags on the molten steel too long can result in a reversion of elements such as phosphorus back into the steel. To avoid this, slag can be removed at slagskimming stations, where the ladle is tilted forward and a rake scrapes the slag into a slag pot parked beneath the ladle.
The blast furnace (BF) iron slag, also known as a ground granulated blast furnace slag (GGBFS), the electric arc furnace carbon or stainless steel slag (EAFC/S), and the ladle furnace basic slag (LS), also called the white slag, have been regarded as precursors which exhibit good mechanical properties following alkali activation and can be ...
The variation in composition and properties of blast furnace slags are largely determined by the gangue in the ore and ash in the coke and much progress has been made in the reuse of such slag. With respect to steelmaking slag, emphasis has in recent years been placed on hot metal treatment before refining and ladle treatment after ...
Jun 06, 2014· The blast furnace (BF) cast house is the working area where hot metal and liquid slag are tapped from the blast furnace and either poured into ladles (torpedo car or open top ladle) or led off for solidification (pig casting and slag granulation) or treatment (cast house desulphurization).
Steel Steel Basic oxygen steelmaking: More than half the world''s steel is produced in the basic oxygen process (BOP), which uses pure oxygen to convert a charge of liquid blastfurnace iron and scrap into steel. The basic oxygen furnace (BOF) is a refractorylined, tiltable converter into which a vertically movable, watercooled lance is inserted to blow oxygen through nozzles at ...
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