Reheating and Rolling of Slab Ingots with A Liquid Core

A two-dimensional mathematical model describing the colling and reheating characteristics of slab ingots has been established.Based on this model, the simulative calculation has been carried out for the colling process of the slab ongot weighted 10.866 ton from pouring to charging and the reheating process if them in the soaking pits with one burner at one side wall.
The parameters, such as the thermal states of slab ingots in colling and reheating processes, the reheating time and the reheating stratagy which have to be controlled for the reheating and rolling of slab ingots with a liquid core have been given from the calculating results.By comparison the actural data to the outputs of the model, this model is availiable for the industrial processes. These researches memtioned above are the theoretical basis for the industrial test and the actural production.
The 51 charges of slab; ingots (total weighted 6769 ton) have been tested at Benxi Iron & Steel Company, the test results show that the research is succeessed in saving power and the economic benefit is remarkable, such as:
(1) Raisng the production of the soaking pits by 1.5 times,
(2) Descreasing the heat comsumed by producing 1 ton slab ingots by 0.795×10⁶ kJ:
(3) Saving power 3.12 kW h/t (ingot);
(4) Descreasing the oxide of steel by 0,5%.