Abstract:Large ingots are mainly used for the production of supper thickness plate, and with the increase of the ingot mass, the porosity is deep on the upper of the ingot, which reduces the metal yield, and makes the organization density relatively poor and the segregation serious. The large- rectangular ingot quality becomes the bottlenech of the heavy plate mill capacity. Based on a large deal of foreign literatures, combined with the domestic current situation of the water- cooled mould casting technical, the patents of the water- cooled mould casting technology were summarized, and the influences of water- cooled mould casting technical on the solidification speed of ingot, the uniformity of solidified shell of ingot, the solidified structure and loose shrinkage cavity, and the segregation of ingot were elaborated. Industrial tests of ingot casting with water- cooled mould casting technical and rolling were introduced, and the performance of the steel plate was clarified. The intensive water- cooled mould casting technology for producting large rectangular ingot can provide the blanks for the high quality supper thickness plate.