Mineral powder reduction system

Abstract

The invention discloses a mineral powder reduction system, which includes: a reactor, a heating device and a gas distributor. The reactor includes a feed section, a reduction section and a cooling section. The reduction section is located below the feed section and communicates with the feed section. , the cooling section is located below the reduction section and communicates with the reduction section, the top of the feed section is provided with a feed port, the bottom of the cooling section is provided with a discharge port, and the side wall of the reactor is provided with a reduction tail gas outlet and a reduction gas inlet The heating device is arranged in the reduction section to provide heat for the reduction reaction in the reduction section; the gas distributor is arranged in the feed section, and the gas distributor has a gas inlet and an upwardly facing gas outlet, and the gas inlet and the gas outlet are connected. The gas distributor is configured to blow off the falling mineral powder in the feeding section so that the mineral powder falls into the reducing section in a dispersed manner. According to the ore powder reduction system of the embodiment of the present invention, the ore powder can be fully dispersed by the gas distributor, thereby increasing the contact area between the ore powder and the reducing gas.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to an ore powder reduction system. Background technique [0002] Among related technologies, the direct reduction ironmaking technology is the cutting-edge technology for the development of the iron and steel industry. 2 It is an important development direction to reduce emissions, improve the structure of iron and steel products, and improve the quality of iron and steel products. Direct reduced iron is a substitute for high-quality steel scrap, an indispensable iron source raw material for the production of high-quality pure steel, and a high-quality coolant for converter steelmaking. [0003] At present, the direct reduction methods that have reached the industrial production level or are still being tested are mainly divided into two categories: the direct reduction method using a gas reducing agent and the direct reduction method using a solid reducing agent. Among them, t...

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Problems solved by technology

However, the shaft furnace method can only process massive materials, and cannot directly process powdery iron ore, and needs to be agglomerated when processing powdery iron ore, which has the disadvantages of complicated procedures, energy consumption, water consumption, and poor economy; the reaction tank method ( For example, the HyL method in Mexico) refers to that the charge is fixed in the reaction tank, and the hot reducing gas is introduced to preheat, reduce and cool in sequence, and finally stop the gas regularly to discharge the charge out of the tank. However, the reaction tank method has gas utilization Poor, high heat consumption, and uneven product quality; the fluidized method is a method of reducing iron ore powder with gas in a fluidized bed. Operating at a low temperature of 600-700°C not only has a low reduction rate, but also easily promotes the carbon evolution reaction of CO, which hinders normal operation

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