Device for directly preparing reduced sponge iron from pellets

Abstract

The invention belongs to the technical field of pellet equipment, and particularly relates to a device for directly preparing reduced sponge iron from pellets. The device is characterized by comprising a reaction shaft furnace, a feeding bin, a logistics conveying mechanism connected with the feeding bin, an exhaust pipe section arranged in the reaction shaft furnace and located at the top, a furnace top air outlet pipe located in the exhaust pipe section, a sector rotary feeding mechanism arranged in the reaction shaft furnace around the exhaust pipe section, a discharging bin arranged at thebottom of the reaction shaft furnace, an annular air inlet structure arranged on the side wall of the reaction shaft furnace and located on a roasting section, and an air inlet hole II formed betweenthe discharging bin and the reaction shaft furnace. According to the device, drying, roasting, reducing and cooling of the pellets are completed in one tank, the unnecessary redundant and troublesomeoperation of drying, roasting, cooling, reheating, reducing and cooling in the original process of preparing reduced iron from the pellets is reduced, and redundant equipment in the production process is removed.

Description

technical field [0001] The invention belongs to the technical field of pelletizing equipment, in particular to a device for directly preparing reduced sponge iron from pellets. Background technique [0002] Reduced sponge iron is a pure steel-making raw material with higher quality than scrap steel, which can effectively reduce impurity elements in finished steel, and provides important raw materials for high-end equipment manufacturing enterprises to produce casting blanks of important products. [0003] At present, most of the methods for reducing sponge iron exist are to dry, roast and cool the iron ore pellets outside, and then enter the reduction furnace for reduction to prepare reduced sponge iron. The external drying, roasting and cooling are also performed separately On three different equipments, the drying is carried out on the chain grate, the roasting is completed in the rotary, and then cooled on the ring cooler. This process involves too many equipments, the eq...

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Problems solved by technology

[0003] At present, most of the methods for reducing sponge iron exist are to dry, roast and cool the iron ore pellets outside, and then enter the reduction furnace for reduction to prepare reduced sponge iron. The external drying, roasting and cooling are also performed separately On three different equipments, the drying is carried out on the chain grate, the roasting is completed in the rotary, and then cooled on the ring cooler. This process involves too many equipments, the equipment is complicated, the process is long, and a lot of time and money are wasted. energy

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