The invention belongs to the technical field of nonferrous
metallurgy, and particularly relates to a
laterite ore self-heating balance reduction method. According to the
laterite ore self-heating balance reduction method,
coal is used as a
reducing agent, on one hand,
crystal water in
laterite is evaporated at a high temperature and then is subjected to a water-gas reaction with the
coal to generate
coal gas, on the other hand, the
coal gas and volatile components decomposed in the coal are also generated in the reduction process, and mixed
coal gas is led out at a high temperature and returns to a
combustion chamber to be combusted to serve as a heat source; and additional fuels such as the
coal gas are not needed, process is simple,
energy consumption is low, and
energy conservation and
environmental protection are achieved. The adopted coal is cheap and low-grade
bituminous coal, self-heat-supply reduction is achieved,
energy conservation and
environmental protection are achieved, and production cost is low. A direct reduction
shaft furnace can realize self-heating direct reduction, does not need or only needs a small amount of additional
fuel gas, and can effectively reduce
energy consumption and production cost.