GRATE COOLER

Achieve efficient cooling

The aim of any cooling system is to cool the clinker as quickly as possible, to set and maximize C3S content. Simultaneously, it is important to capture and re-use the heat liberated by this process. In the grate cooler, the clinker enters at a temperature of around 1,200°C, rapidly spreading its heat into the grate and surrounding refractories. High refractoriness, high abrasion resistance and resistance to thermal shock are necessary, especially at the clinker downfall and bull nose.

Click to enlarge

The cooler is effectively divided into two zones – the ‘hot’ zone and the ‘cold’ zone.

In the ‘hot’ zone, from the clinker downfall to the bypass duct and partition wall, the goal is to rapidly liberate heat and route it back to the preheater via the tertiary duct.

In the ‘cold’ zone, when clinker temperature has dropped below 800°C, it is most important to achieve a uniform temperature decline throughout the clinker body. Abrasion is the worst problem here.

Our refractory solutions are listed on the table below: