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These include furnace or tap slag, raker slag, synthetic or ladle slags. Figure 1 presents a diagram of the general flow and production of different slags in a modern steel plant. Following processing and metal recovery, the nonmetallic products from the furnace, raker and ladle slags
Except for heating ladle furnace is an excellent place to make desulfurization with slag, Ca-treatment, and other alloying and trimming additions. The process outline from converter to ladle furnace, vacuum treatment, and casting is presented in Figure 1.6.19.
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 .
Molten pig iron (sometimes referred to as "hot metal") from a blast furnace is poured into a large refractory-lined container called a ladle. The metal in the ladle is sent directly for basic oxygen steelmaking or to a pretreatment stage.
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 blast-furnace iron and scrap into steel. The basic oxygen furnace (BOF) is a refractory-lined, tiltable converter into which a vertically movable, water-cooled lance is inserted to blow oxygen through nozzles at ...
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.
Ladle furnace slag is produced through the addition of lime (CaO), and dolomitic limestone (CaO.MgO) in the electric furnace. The resulting byproduct, ladle furnace slag, contains high concentrations of calcium oxide. Due to high CaO concentrations the material can be used in the production process of cement, as a limestone replacement.
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 ...
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.
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...
Blast furnace tapping operations involve removing the slag and then tapping molten lead from the furnace into molds or ladles. Some smelters tap metal directly into a holding kettle which keeps the metal molten for refining.
the blast furnace, (b) Hot metal ladle in desulphurization station, (c) Basic oxygen furnace, (d) Ladle furnace, (e) Continuous casting exit. Property of Ternium Siderar company. 62 Figure 4-2 Ternium Sider ar steel ladle: (a) Ladle plan, (b) Picture of internal bottom. 63 Figure 4-3 Steps of ladle furnace .
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).
Ladle furnace basic slag (ladle slag, LS) is a by-product of the steel refining process. There is a great amount of LS generated worldwide every year and the current solution is simply landfilling ...
Once the temperature and chemistry are correct, the steel is tapped out into a preheated ladle by tilting the furnace. For plain-carbon steel furnaces, as soon as slag is detected during tapping, the furnace is rapidly tilted back towards the deslagging side, minimizing slag carryover into the ladle.
Current Refractory Technology and Practices in the Steel Industry April 26, 2017 ... Slag Runner, Tilter Blast Furnace Ancillary Equipment-> Stoves, Bustle Pipe, Tuyeres. United States Steel Corporation 6 Ironmaking Refractory Technology ... ladle shrouds Ladle Well Block Ladle Inner Well Nozzle Ladle Gate Mechanism Ladle Shroud 0 2 4 6 8 10 12 ...
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 ...
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.
Dec 01, 2019· Hello everyone. BLAST FURNACE The blast furnace is a counter-current 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...
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 ...
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 slag-skimming stations, where the ladle is tilted forward and a rake scrapes the slag into a slag pot parked beneath the ladle.
Jan 10, 2020· After the molten iron flows out of the blast furnace tap hole, it passes through the molten iron channel system, after slag and iron separation and pretreatment, flows into the molten iron ladle or torpedo tanker. When the blast furnace is tapped, the temperature of the molten iron is .
Blast furnace slag is made during the melting and reduction of iron ore in a blast furnace. Steel making slag (also: steel slag) is produced during the conversion of hot metal to crude steel in a basic oxygen furnace or during the melting of scrap in an electric arc furnace. If the crude steel undergoes further secondary steelmaking processes ...
The slag can also be used to create fibers used as an insulation material called slag wool. Basic slag. Basic slag is a co-product of steelmaking, and is typically produced either through the blast furnace - oxygen converter route or the electric arc furnace - ladle furnace route.
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