A Method of Using CO2 to Control the High Temperature Ignition Point in the Jet Impact Zone of Converter Oxygen Lance
A technology of jet impact and converter oxygen lance, which is applied in the manufacture of converters, etc., can solve the problems of severe high-temperature heat radiation at the fire point, difficulty in effectively releasing heat, waste of input energy of the converter, etc., to reduce heat radiation, prevent overoxidation, The effect of improving energy utilization efficiency
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Embodiment 1
[0020] The present invention is applied to the 150t converter steelmaking process, and the CO 2 with O 2 Homogeneous mixing while achieving CO 2 Dynamic adjustment of mixing ratio, O 2 -CO 2 The total flow rate of mixed injection is 34000Nm 3 / h, real-time monitoring of converter flue gas temperature.
[0021] 1) Before blowing starts, use a gas static mixer to mix CO 2 with O 2 Carry out premixing to ensure the stability of gas source pressure and flow;
[0022] 2) In the early stage of blowing, that is, within 0 to 5 minutes of blowing time, the oxygen lance is lowered to 1.6m from the molten steel surface, and the CO is controlled. 2 The injection ratio is 15%, the oxygen lance gas supply pressure is 0.9MPa, and the blowing is started to ensure the rapid temperature rise of the molten pool and slag removal, while inhibiting the oxidation and heat release of Si and Mn elements in the molten pool, and reducing the thermal radiation of the fire point.
[0023] 3) Withi...
Embodiment 2
[0028] The present invention is applied to the 300t converter steelmaking process, and the CO 2 with O 2 Homogeneous mixing while achieving CO 2 Dynamic adjustment of injection ratio, O 2 -CO 2 The total flow rate of mixed injection is 58000Nm 3 / h, real-time monitoring of converter flue gas temperature.
[0029] 1) Before blowing starts, use a gas static mixer to mix CO 2 with O 2 Uniform mixing to ensure stable gas source pressure and flow;
[0030] 2) Within 0-6 minutes of blowing time, the oxygen lance is lowered to 1.8m from the molten steel surface, and the CO is controlled 2 The blowing ratio is 14%, the air supply pressure of the oxygen lance is 0.92MPa, and the blowing is started to ensure the rapid temperature rise of the molten pool and slag removal, while inhibiting the oxidation and heat release of Si and Mn elements in the molten pool, and reducing the thermal radiation of the fire point;
[0031] 3) Within 6 to 12 minutes of blowing, the oxygen lance conti...
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