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During the period of cooling and hardening from its molten state, BF slag can be cooled in several ways to form any of several types of BF slag products. Blast Furnace: Combustion material and ore are supplied from the top while an air flow is supplied from the bottom of the chamber.
Granulated blast furnace slag is used as a mineral admixture for Portland cement concrete. Granulated blast furnace slag and vitrified pelletized blast furnace slag are also used in the manufacture of blended hydraulic cements.wo types of blast furnace slag such air-cooled slag and granulated slag are being generated from the steel plants. In most cases, this slag is produced in the form of granulated slag. The specific gravity of the slag is approximately 2.90 with its bulk density varying in the range of 1200 1300 kg/m3.