What do you mean by acid slag and basic slag?

Asked By: Janosne Vainshtok | Last Updated: 9th March, 2020
Category: home and garden indoor environmental quality
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Slag is the impurity that should be removed from raw ore to obtain pure metal. Acidic slag contains high concentrations of acidic or amphoteric oxides (SiO2, Al2O3). But the excess of basic oxide added makes the slag basic. If naturally such basic oxides are present as impurities, then also the slag is termed as basic.

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Also to know is, what do you mean by basicity of slag?

1): Eq. 1: If the basicity value is greater than one, the slag is referred to as basic, with a basicity value smaller than one, it is referred to as acidic. Due to their weaker FeO and MnO bonds, basic slags can be reduced more easily than acidic slags with stronger bonds.

Subsequently, question is, what is slag example? Slag is waste matter separated from metal during smelting. An example of slag is the iron and silica that is removed during copper and lead smelting.

Beside this, what is basic slag used for?

Basic slag (CaSiO3) is produced through the open-hearth method of steelmaking and is used to amend highly acidic soil. Its pH-raising effect is similar to that of ground limestone.

What is the chemical composition of slag?

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).

31 Related Question Answers Found

What is a strong base?

A strong base is a base that is completely dissociated in an aqueous solution. These compounds ionize in water to yield one or more hydroxide ion (OH-) per molecule of base. In contrast, a weak base only partially dissociates into its ions in water. Ammonia is a good example of a weak base.

Why slag is used in cement?

Slag cement is most widely used in concrete, either as a separate cementitious component or as part of a blended cement. It works synergistically with portland cement to increase strength, reduce permeability, improve resistance to chemical attack and inhibit rebar corrosion.

Is steel slag safe?

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].

Is slag good for driveways?

Steel slag is commonly used to cover driveways, to fill potholes, repair farm lanes, residential entrances, or yards. 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.

Why is slag important in metallurgy?

Slag, Metallurgical. They play an important role in the physicochemical processes of metallurgical production: they remove undesirable impurities in metals and protect metals from the harmful effects of the gaseous medium in the furnace (that is, from oxidation and gas saturation).

Is iron slag magnetic?

Slag is one of the substances most commonly mistaken for meteorites, as it appears burned and melted on the surface and often sticks to a magnet due to its high iron content.

Is slag hazardous waste?

In some countries, including Indonesia, steelmaking slag is categorized as hazardous and toxic waste. However, slag can be used as raw material for the other purposes. In Germany, Japan, USA and some other countries, slag is not classified as hazardous waste.

What causes slag explosion?

But whether it's slag or another type of molten metal, the process causing the explosion is the same: a vapor, or steam, explosion. When the molten metal hits the ground, it heats up the water—possibly from a puddle or just normal ground moisture—so fast that it instantly turns to steam.

What is black slag?

Black slag (also called black sand or black grit) was distributed from the smelter between the 1960s and 1990s, and was frequently used as a filling material in landscaping and engineering works in the local area due to its excellent drainage properties, easy handling, load bearing capacity, and abundant supply.

What is called slag?

slag. Waste content of metal ores that floats on the surface during the process of extracting or refining metal. Containing mainly silicates, sulfates, and phosphates of calcium, slag is used principally in road building and concrete admixtures. Also called tailing.

What does slag off mean?

Definition of slag off. British slang. : to criticize (someone) harshly She often slags off other musicians to try to make herself look good.

What is the difference between slag and dross?

As nouns the difference between dross and slag
is that dross is waste or impure matter while slag is waste material from a coal mine.

What does slag mean in America?

slag in American English
a. a worthless, contemptible person. b. a sexually promiscuous woman. verb transitiveWord forms: slagged or ˈslagging.

What is the chemical name of slag?

Calcium silicate is the slag formed in the extraction of iron.

How is slag formed in welding?

Slag is formed when flux, the solid shielding material used in the welding process, melts in or on top of the weld zone. Slag is the solidified remaining flux after the weld area cools.

What is the density of slag?

Slag, solid weighs 2.114 gram per cubic centimeter or 2 114 kilogram per cubic meter, i.e. density of slag, solid is equal to 2 114 kg/m³. In Imperial or US customary measurement system, the density is equal to 132 pound per cubic foot [lb/ft³], or 1.222 ounce per cubic inch [oz/inch³] .