GGBS is granulated blast furnace slag, ground to very high fineness. When the molten slag from the blast furnace is tapped & subjected to a process of rapid cooling by jets of pressurized water, it forms granules, which is called granulated slag. The slag hardens when it reacts with water, getting a hydraulic property that provides increased strength over a period of time.

GGBS, when used along with OPC (Ordinary Portland Cement) in concrete or mortar mix, imparts unique properties to obtain very strong and durable mix.

GGBS is widely used by the ready-mix concrete plants, apart from major construction projects in India. It is known to almost double the lifespan of structures.

GoodRich offers vertical roller mills from China for making GGBS. Vertical roller mill is a type of grinder used to grind the materials into extremely fine powder. It is an energy-efficient alternative for ball mill.

Vertical roller mills have been developed in China with German & Japanese technologies. They can be used for grinding of clinker, cement & slag. The available capacities are from 500 tons to 3,000 tons per day. A vertical roller mill combines intermediate crushing, grinding, drying, separating & conveying processes. While grinding the slag, the fineness will be as per Blaine>4,200 cm²/gram. The initial moisture of 15% in the slag will be reduced to 0.5% in the process.

Advantages of vertical roller mill – 

• 20-50% less energy needed than ball mill systems
• Can be used for Portland cement, slag and blended cements
• High productivity with stable & reliable operation
• Design optimized for maintenance
• Effective drying when grinding blast furnace slag or blended cements with wet components
• Consistent cement quality with easy-to-adjust quality parameters
• Good particle size distribution; modification of PSD (particle size distribution) curve possible
• High fineness
• Small variation in the quality
• Long lifetime
• Simple, compact layout
• Proven technology