The invention relates to a device and method for joint production of iron,
sulfur and gas in the
smelting process of
pyrite, and belongs to the field of
metal smelting. The method comprises the following steps of calcining the
pyrite at the bottom part of the interior of a calcining-gasifying reaction
tower, enabling pulverized
coal and
fly ash to generate gasifying reaction at the middle upper part, enabling the
sulfur-containing
flue gas to carry the high-valence
oxide of iron produced by calcining at the
tower bottom to the middle upper part of the reaction
tower, mixing with the gas and
coke produced by gasifying, and generating oxidation and reduction reaction; separating the product by an iron-based high-temperature separator and a carbon-based high-temperature separator, and sendingback into an
iron oxide reduction tower; performing secondary reduction reaction on the
iron oxide in the
iron oxide reduction tower, and producing reduction gas, so as to obtain iron
slag; purifyingthe crude gas, so as to obtain the purified gas; enabling a
sulfur condenser to condense and recycle the sulfur. The method has the advantages that the joint production of iron, sulfur and gas is realized in the
smelting process of the
pyrite, and the pyrite can be efficiently and cleanly utilized.