Refractories that will optimize your grate cooler

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. For dramatically extended refractory life and the fastest possible installation at the clinker downfall, bull nose, front sidewalls and roof, use Firebolt refractory precasts, which can be quickly bolted into place and just as quickly removed. For brick or monolithic alternatives, refractories should offer high refractoriness, abrasion-resistance and cold crushing strength. Bypass duct wear linings should be lined with Viking 450 bricks and Denscast 50A QF castable in order to withstand the abrasive, alkaline effects of the tertiary airstream.

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. The optimal refractory alternative is a brick such as Viking 330, complemented by Denscast 50 A QF castable.

To achieve exceptionally long life in the partition wall separating the two zones, use           Denscast 50 A QF refractory precast.