What is slag process?

What is slag process?

Slag is a by-product of the metallurgical smelting process. Slag has a double role: it permits removal of impurities, known as gangue, from the melt by forming oxides. During the fluxing process, slag removes the non-ferrous constituents from the molten iron, which purifies the product.

What is slag composition?

The primary components of iron and steel slag are limestone (CaO) and silica (SiO2). Other components of blast furnace slag include alumina (Alsub>2O3) and magnesium oxide (MgO), as well as a small amount of sulfur (S), while steelmaking slag contains iron oxide (FeO) and magnesium oxide (MgO).

What is ladle furnace slag?

Ladle furnace reducing slag (LFS) is a byproduct of steelmaking industries obtained from the ladle furnace refining of carbon and low alloy steels. This process makes it possible to eliminate the sulphur and takes place in the presence of a basic slag in which the most significant oxides are SiO2, Al2O3, CaO, and MgO.

What is the purpose of slag?

Slag floats on the surface of the molten metal, protecting it from oxidation by the atmosphere and keeping it clean. Slag forms a coarse aggregate used in certain concretes; it is used as a road material and ballast and as a source of available phosphate fertilizer.

What is the main use of slag?

Due to its positive technical characteristics, LD slag is used all over the world in road and railway construction and for engineering. The most common use is as an aggregate in the manufacture of asphalt. It is also successfully used as an aggregate for concrete.

Is iron slag toxic?

When SSRS compares with ground granulated blast furnace slag (GGBFS) from iron making, steel slag contains toxic ingredients such as nickel, cadmium, chromium and strontium. These compounds could be harmful not only for environment but also for human health [9,10].

What is slag used in cement?

Slag cement is a hydraulic cement formed when granulated blast furnace slag (GGBFS) is ground to suitable fineness and is used to replace a portion of portland cement. Once the slag has been cooled and ground to a usable fineness it is stored and shipped to suppliers throughout the United States. …

What is reducing slag?

It consists of oxidizing slag that is generated during oxidation refining, and reducing slag that is generated during reduction refining. Approximately 70 kg of electric arc furnace oxidizing slag and 40 kg of reducing slag are generated for each ton of electric arc furnace steel.

What is LF in steel making?

Abstract. 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.

What is slag cement disadvantages?

Disadvantages of Blast-Furnace Slag Cement Early Strength is low; therefore, it cannot be used in Reinforced Cement Concrete (RCC) works. As the initial setting time is high, this cement is not used for emergency or repair works.

Is slag good for driveways?

Steel slag is not just good for driveways, it is also used by homeowners as a landscaping stone in back yards around a pool area or patio. Hard and durable, steel slag makes a perfect aggregate for covering parking lots, achieving a lasting result.

Is slag safe to handle?

Dust from the slag, a byproduct from steel manufacturing, contains metals at levels that are harmful to infants and toddlers but also for kids up to 18 years old, a state toxicologist report says. The slag dust also is dangerous for adults, who are exposed to levels nearly twice what’s considered safe.

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