System and method for treating copper-containing molten iron

[0074] Send the copper-containing molten iron at 1450 degrees Celsius to the atomization granulation device for atomization and granulation to obtain copper-containing fine iron particles with a particle size of less than 74 microns, accounting for 86%. Among them, TFe in the copper-containing molten iron contains 95wt%, Cu Containing 1.0wt%; Then the above-mentioned copper-containing fine iron particles, ammonia and carbon dioxide are sent to the stirring leaching tank to carry out ammonia leaching reaction, the ammonia leaching conditions are: the ammonia water mass concentration is 1%, the carbon dioxide mass concentration (in the form of (NH 4 ) 2 CO 3 ) is 2%, the liquid-solid ratio is 10:1, the ammonia immersion temperature is 40 degrees centigrade, and the time is 2h. After the reaction finishes, carry out solid-liquid separation to obtain iron powder and copper-containing ammonia immersion solution. TFe contains 95.5% of the iron powder. wt%, Cu contains 0.05wt%, iron po

[0076] Send the copper-containing molten iron at 1500 degrees Celsius to the atomization granulation device for atomization granulation, and obtain copper-containing fine iron particles with a particle size of less than 74 microns, accounting for 90%. Among them, the copper-containing molten iron contains 96wt% TFe and Cu 0.8wt%; then the above-mentioned copper-containing fine iron particles, ammonia and carbon dioxide are sent to the stirring leaching tank to carry out ammonia leaching reaction, and the ammonia leaching conditions are: the ammonia water mass concentration is 3%, and the carbon dioxide mass concentration (in the form of (NH 4 ) 2 CO 3 ) is 4%, the liquid-solid ratio is 6:1, the ammonia immersion temperature is 45 degrees centigrade, and the time is 1h. After the reaction finishes, carry out solid-liquid separation to obtain iron powder and copper-containing ammonia immersion solution. In the iron powder, TFe contains 97.2 wt%, Cu contains 0.04wt%, iron powder ca

[0078] Send the copper-containing hot metal at 1525 degrees Celsius to the atomization granulation device for atomization and granulation, and obtain copper-containing fine iron particles with a particle size of less than 74 microns, accounting for 95%. 0.6wt%; then the above-mentioned copper-containing fine iron particles, ammoniacal liquor and carbon dioxide are sent to the stirring leaching tank to carry out ammonia leaching reaction, and the ammonia leaching condition is: the ammoniacal liquor mass concentration is 6%, and the carbon dioxide mass concentration (with (NH 4 ) 2 CO 3 ) is 5%, the liquid-solid ratio is 3:1, the ammonia immersion temperature is 50 degrees Celsius, and the time is 30min. After the reaction is over, solid-liquid separation is carried out to obtain iron powder and copper-containing ammonia immersion solution. TFe content in iron powder is 98.2 wt%, Cu contains 0.03wt%, iron powder can be used as the steelmaking raw material of high-quality carbon st