The correct answer is D. Molten calcium silicate.
Slag is a byproduct of the iron and steel making process. It is a molten mixture of silicates, alumina, and other impurities that are removed from the molten iron. Slag is a valuable material that can be used in a variety of applications, including road construction, cement production, and as a flux in the steel making process.
Molten iron is
the liquid form of iron that is produced in the blast furnace. It is a very hot and viscous material that is used to make steel.Molten sand is a mixture of silica and other minerals that is heated to a high temperature. It is used in a variety of applications, including glassmaking, foundry work, and abrasives.
Molten alumina is a mixture of aluminum oxide and other minerals that is heated to a high temperature. It is used in a variety of applications, including ceramics, electronics, and abrasives.