Blast furnace smelting method based on iron oxide scale cold-pressed pellets

Abstract

The invention relates to the technical field of blast furnace smelting, in particular to a blast furnace smelting method based on iron oxide scale cold-pressed pellets. The method comprises the following steps: crushing iron oxide scale, uniformly mixing the crushed iron oxide scale with blast furnace fly ash and a glutinous rice starch solution, and carrying out cold pressing to obtain a mixture with the iron content of 68-70% and the carbon content of 1t; 5% of pellets; adding the pellets into a blast furnace along with ore batches, and arranging the pellets in the middle area of a furnace throat charge level; and according to the pellet adding amount, the coke batch is adjusted through a formula, the in-furnace alkalinity, the air temperature and the oxygen enrichment rate are synchronously improved, and the material distribution system is adjusted to control the center airflow. The metallurgical solid waste is efficiently converted into the blast furnace raw material, the sintering procedure is omitted, and the production cost and energy consumption are remarkably reduced; and stable and smooth operation of the blast furnace is guaranteed through a matched operation strategy, resource circulation and green smelting are achieved, and outstanding economic and environmental benefits are achieved.

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