Ground Granulated Blast Furnace Slag (Iron Slag)

Description

Ground Granulated Blast Furnace Slag (Iron Slag)

This product can be used as a pozzolan in combination with cement. When mixed with cement, iron slag powder reacts with calcium hydroxide (a byproduct of cement hydration) to form a secondary gel. Over time, this secondary gel combines with the primary gel from cement hydration, enhancing the durability of concrete and significantly improving its resistance to corrosive agents. Due to its ability to reduce hydration heat, it is particularly recommended for mass concrete pours and construction in hot climates.

Additionally, this product can serve as a raw material for geopolymer cement production.

Studies indicate that up to 40% of cement can be replaced with this material.

Ground Granulated Blast Furnace Slag (Iron Slag)

Production Process of Blast Furnace Slag

In the iron smelting industry, limestone, iron ore, and coke are fed into the blast furnace. Under extreme heat, these materials melt, producing molten iron and a non-metallic byproduct: slag. For every ton of pig iron produced, approximately 300 kg of slag is generated.

The primary components of slag in domestic iron smelting include silica, aluminosilicates, and calcium silicates. While slag has a structure similar to ordinary cement, most slag produced in local factories remains unusable due to inadequate processing and is often discarded in landfills.

Ground Granulated Blast Furnace Slag (Iron Slag)

Activation of Slag for Cement Use

Research shows that locally produced slag can be effectively used in cement mixtures—provided it is rapidly cheald (rapidly cooled) after extraction from the furnace and ground to cement-like fineness (GGBFS). This process enhances its reactivity, allowing it to function as an efficient pozzolan in concrete.

Through collaboration with an iron smelting plant, we produce GGBFS by rapid chealding and finely grinding the slag. This treatment significantly increases its reactivity, making it suitable for high-performance concrete applications.

Supply & Distribution

Our company is ready to supply GGBFS at competitive prices and deliver it nationwide in any required quantity.