The invention provides a low-dust iron and steel
metallurgy method. The low-dust iron and steel
metallurgy method comprises the following steps that S1, raw materials are selected, specifically, concentrate
powder with the
Fe content being greater than or equal to 65% or crushed rolled steel oxidized scale, water and a binder are selected for
pelletizing; S2, reduction is conducted, specifically,the raw materials are fed into a belt-type reduction furnace, a catalyst is added, CH4 is converted into H2 and CO through the catalyst at the high temperature,
ferric oxide is subjected to reductionsmelting, the temperature is set to be 900-1050 DEG C, the
heating time is 1-3 h, the thickness of a material layer is 20-30 mm, thus
metal iron particles are obtained, other
metal elements in the
ferric oxide exist in the
metal iron particles in the form of MxOy, and M is the other metal elements; S3, cold pressing or
hot pressing is conducted, specifically, the metal iron particles at the temperature of 50-800 DEG C are directly subjected to cold pressing and
hot pressing to be 3-5 g / cm<3> of blocky iron; and S4,
smelting separation is conducted, specifically, 3-10% of CaO or CaF2 is added into the furnace, and
smelting separation is conducted to obtain clean
molten steel with the
Fe content being greater than or equal to 99.0% and a small amount of
solid steel
slag containing impurities. According to the low-dust iron and steel
metallurgy method, almost no dust is generated in the whole production process, and thus low-dust environment-friendly metallurgy is carried out.