On the basis of producing ferronickel through a
laterite-
nickel ore
rotary kiln granular iron method, in order to produce granular iron products by adopting iron-containing materials and taking a
rotary kiln as reduction equipment, the adopted production process comprises the following steps: preparing, mixing, wet-
grinding and
pelletizing the iron-containing materials, pulverized
coal and a composite binder to obtain wet
pellets,
drying the wet
pellets through a
drying machine, screening the wet
pellets through a vibrating screen, and carrying out
hot pressing on the wet pellets to obtain the granular iron products. And adding the dry pellets into a
rotary kiln. After the pellets are preheated and heated in the rotary
kiln, iron in the materials is oxidized and subjected to a reduction reaction,
slag with uniform components is generated from other components in the materials through a slagging reaction, the reduced
metal iron is polymerized and grows to 1.20-30.0 mm and is uniformly suspended in the
slag, the
slag-iron mixture falls into water to be subjected to water
quenching after being discharged from the rotary
kiln in the form of viscous blocks, and the slag-iron mixture is cooled to the
room temperature. And the block
mass is subjected to ore
grinding by an ore
grinding machine and
magnetic separation by a
magnetic separator to obtain a granular iron product. The iron-containing material is reduced through the carbon-containing pellets, compared with a traditional iron making process, the reaction is carried out at low temperature in a short time, and high-quality granular iron can be produced.