Ontology-based Fuzzy Inference Mechanism for HRV Analysis

A bottom outlet or discharge for metallurgical vessels includes a sleeve brick, a nozzle brick positioned in the sleeve brick, the nozzle brick having therethrough a discharge opening, and a highly wear-resistant tubular sleeve fitted within the discharge opening of the nozzle brick. The sleeve brick, the nozzle brick and the sleeve are formed of materials such that they have thermal expansions at 1400 DEG C. of from 1.0 to 1.15%, from 0.5 to 0.8% and from 1.1 to 1.25%, respectively.