Production apparatus and method for electric arc furnace steelmaking with fully continuous ultra-short process

A production apparatus for an electric arc furnace steelmaking with a fully continuous process, comprising four operation sites, wherein the four operation sites are an electric arc furnace for melting and primary refining, a sealed tapping chute for molten steel flows out of the electric arc furnace, a refinement storage bed for molten-steel desulfurization and alloying and a conticaster for continuous casting;

• a material flow, an energy flow and a time stream in the four operation sites are in a dynamic equilibrium;
• the electric arc furnace, the refinement storage bed and the conticaster are arranged from a higher position to a lower position respectively, a tapping hole of the electric arc furnace located at a higher position is connected to a higher-position end of the refinement storage bed located at a lower position via the sealed tapping chute, and the conticaster is located below a lower-position end of the refinement storage bed, and the conticaster is connected via the tapping hole;
• sizes of the electric arc furnace, the sealed tapping chute, the refinement storage bed and the conticaster are matched;
• materials, energies, times and temperatures in the electric arc furnace, the sealed tapping chute, the refinement storage bed and the conticaster are matched and dynamically linked;
• the electric arc furnace, the sealed tapping chute, the refinement storage bed and the conticaster are arranged from a higher position to a lower position spatially;
• after a smelting is started, a metal material is continuously added into the electric arc furnace, to complete the melting and a dephosphorization;
• a carbon powder and a silicon powder are jetted into the sealed tapping chute as reducing-agent powders;
• and
• refining is performed at the higher-position end of the refinement storage bed, to complete the desulfurization and alloying, and a refined molten steel is stored and heated at the lower-position end of the refinement storage bed, and the refined molten steel continuously flows into the conticaster, to obtain an ingot blank, to realize a fully continuous steelmaking,
• wherein the sealed tapping chute is of a sealed structure, and the sealed tapping chute comprises a chute main body, an upper through hole, a powder jetting device and a lower through hole;
• the chute main body is constructed by using a refractory material;
• the upper through hole is a molten-steel flow-in end, and the upper through hole is connected to the tapping hole of the electric arc furnace;
• the powder jetting device is inserted into the chute main body, and the powder jetting device jets the carbon powder and the silicon powder as the reducing-agent powders to a steel flow;
• and
• the lower through hole is a molten-steel flow-out end, and the lower through hole is connected to the refinement storage bed, and the lower through hole protrudes below a liquid level of the refined molten steel in the refinement storage bed.

A production apparatus for an electric arc furnace steelmaking with a fully continuous process, comprising four operation sites, wherein the four operation sites are an electric arc furnace for melting and primary refining, a sealed tapping chute for molten steel flows out of the electric arc furnace, a refinement storage bed for molten-steel desulfurization and alloying and a conticaster for continuous casting;

• a material flow, an energy flow and a time stream in the four operation sites are in a dynamic equilibrium;
• the electric arc furnace, the refinement storage bed and the conticaster are arranged from a higher position to a lower position respectively, a tapping hole of the electric arc furnace located at a higher position is connected to a higher-position end of the refinement storage bed located at a lower position via the sealed tapping chute, and the conticaster is located below a lower-position end of the refinement storage bed, and the conticaster is connected via the tapping hole;
• sizes of the electric arc furnace, the sealed tapping chute, the refinement storage bed and the conticaster are matched;
• materials, energies, times and temperatures in the electric arc furnace, the sealed tapping chute, the refinement storage bed and the conticaster are matched and dynamically linked;
• the electric arc furnace, the sealed tapping chute, the refinement storage bed and the conticaster are arranged from a higher position to a lower position spatially;
• after a smelting is started, a metal material is continuously added into the electric arc furnace, to complete the melting and a dephosphorization;
• a carbon powder and a silicon powder are jetted into the sealed tapping chute as reducing-agent powders;
• and
• refining is performed at the higher-position end of the refinement storage bed, to complete the desulfurization and alloying, and a refined molten steel is stored and heated at the lower-position end of the refinement storage bed, and the refined molten steel continuously flows into the conticaster, to obtain an ingot blank, to realize a fully continuous steelmaking,
• wherein the refinement storage bed is of a sealed structure, and the refinement storage bed comprises a bottom-blowing element, a charging hole, a flue, a vacuum slag cleaner, an induction coil, a plasma gun, a tapping linking device, a tapping hole and a slag hole;
• the refinement storage bed is constructed by using a refractory material, wherein the refinement storage bed is arranged in a form of a vertical step, and the refinement storage bed has a first end connected to the sealed tapping chute as the higher-position end, and a second end connected to the conticaster as the lower-position end;
• the bottom-blowing element is at a bottom of the refinement storage bed;
• the charging hole is arranged at a top of the refinement storage bed;
• or
• the temperature measuring and sampling device or a charging tube protrudes into the refinement storage bed via the charging hole;
• the flue is located at the top of the refinement storage bed;
• the vacuum slag cleaner is located behind a last charging hole at an end adjacent to the conticaster of the top of the refinement storage bed, and contacts a slag surface;
• the induction coil and/or the plasma gun are arranged at a bed wall of the refinement storage bed;
• the tapping linking device located at the lower-position end of the refinement storage bed stores an amount of the refined molten steel, and the tapping linking device has a cushioning effect, wherein a slag dam is provided at a connection between the tapping linking device and the higher-position end of the refinement storage bed, and the slag dam a slag-free tapping;
• the tapping hole of the refinement storage bed is located at an end of the bottom of the refinement storage bed, wherein the end of the bottom of the refinement storage bed is adjacent to the conticaster, and the tapping hole of the refinement storage bed is connected to the conticaster;
• and
• the slag hole is an opening at a furnace wall of the refinement storage bed.