Method for collecting high-quality coal gas in process of producing reduced iron powder by means of microwave heating
A technology of reducing iron powder and microwave heating, applied in furnaces, furnace types, fluidized bed furnaces, etc., can solve the problems of low reuse value and high CO2 content, and achieve the effect of uniform product quality and short production cycle
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Embodiment 1
[0015] (1) Raw material preparation: powdered iron scale (T Fe ≥71%), charcoal with a volatile content of ≥21%, and coal with a volatile content of ≥21% are crushed to 150 mesh;
[0016] (2) Fabric: Layer the materials prepared in step (1): the bottom layer is coal, which is 10% of the mass of iron-containing raw materials; the middle layer is a mixture of charcoal and iron-containing raw materials, and the amount of charcoal is the mass of iron-containing raw materials 15%; the upper layer is coal, and the amount of coal in this layer is 1% of the mixture mass in the middle layer;
[0017] (3) Heating: Put the material laid out in step (2) into a microwave reactor and heat it to 1000°C and keep it warm for 60 minutes. 83.142%, H 2 10.31%, CH 4 0.991%, CO 2 Accounting for 5.556%. ).
[0018] The resulting reduced charge is cooled, crushed, sieved, wet magnetic separation, and dried to obtain high-quality primary reduced iron powder (T Fe =98.99%).
Embodiment 2
[0020] (1) Raw material preparation: powdered iron scale (T Fe 74%), charcoal with a volatile content of 25%, and coal with a volatile content of 26% are pulverized to 100 mesh;
[0021] (2) Cloth: Layer the materials prepared in step (1): the bottom layer is charcoal, which is 8% of the mass of iron-containing raw materials; the middle layer is a mixture of charcoal and iron-containing raw materials, and the amount of charcoal is the mass of iron-containing raw materials 11%; the upper layer is coal, and the amount of coal in this layer is 2% of the mass of the mixture in the middle layer;
[0022] (3) Heating: Put the material laid out in step (2) into a microwave reactor and heat it to 1100°C, and keep it warm for 40 minutes. 83.637%, H 2 9.722%, CH 4 0.994%, CO 2 Accounting for 5.532%. ).
[0023] The resulting reduced charge is cooled, crushed, sieved, wet magnetic separation, and dried to obtain high-quality primary reduced iron powder (T Fe =98.47%).
Embodiment 3
[0025] (1) Raw material preparation: powdered iron scale (T Fe 74%), charcoal with a volatile content of 25%, and coal with a volatile content of 26% are pulverized to 200 mesh;
[0026] (2) Fabric: Layer the materials prepared in step (1): the bottom layer is coal, which is 5% of the mass of iron-containing raw materials; the middle layer is a mixture of charcoal and iron-containing raw materials, and the amount of charcoal is the mass of iron-containing raw materials 17%; the upper layer is coal, and the amount of coal in this layer is 1.5% of the mass of the mixture in the middle layer;
[0027] (3) Heating: Put the material laid out in step (2) into a microwave reactor and heat it to 1200°C, and keep it warm for 5 minutes. 82.985%, H 2 10.551%, CH 4 Accounted for 0.978%, CO 2 Accounting for 5.479%. ).
[0028] The resulting reduced charge is cooled, crushed, sieved, wet magnetic separation, and dried to obtain high-quality primary reduced iron powder (T Fe =98.94%)....
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