Steelmaking and
heating furnaces

Technical characteristics of the heating furnace.

Features of the process

• use of plasma torches, allowing to work under the charge, with a variable plasma torch geometry. Plasma torches operate on hot, unpurified gases from the furnace, with no temperature restrictions, and are considered as one of the important tools for process control;
•  controlled and controlled hydrogen and carbon oxide media work as main reducing agents;
• a high shaft is used, in which the processes of drying, preheating and solid-phase reduction take place, conditions are created for the correct course of reduction processes in the solid phase;
• use of recirculation of hot gases along the shortest contour of the furnace, through the plasma torch and a specially organized system of recirculation, which provides recycling of the components of the top gas gases, making full use of the reducing and thermal capabilities of the plasma-forming gases from the furnace atmosphere;
• EPOS-process takes place in the absence of additional excess oxidant, at the exit of the furnace – CO2 and H2O vapors;
• a special form of controlled reaction zone is used, in which the resulting metal and slags are reduced and melted, chemical reactions are completed;
• a “self-contained” briquette containing ore material, carbonaceous reducing agent is used in ratios balanced for complete recovery of the ore components for this process and the design of the working area.
• The set of solutions provides the extraction of useful components from ore up to 95% and energy savings up to 2 or more times in comparison with existing RWPs

New design of the plasma torch

BRIQUETTES FOR PLASMA RWP

• Briquette must have mechanical strength and resistance to cracking in cold and hot conditions up to a given temperature.
• briquette must have a gas permeability sufficient for the reactions to pass through the entire volume of the briquette.
• Briquette should have a carefully selected composition, with a certain predetermined fractional component.
• Briquettes should not be connected to a gas-tight formation in the furnace, thereby terminating the mine permeability and gas recirculation, and should take the correct form in the respective zones of the furnace.
• The problem of briquette is one of the most important, and the solutions found for this problem, combined with smelting modes, is one of the most important know-how in creating high-quality technology and design of shaft furnaces of this type.

1.5 MW plasma shaft furnace for the production of silicon-manganese

Options

• Furnace capacity from 2 to more than 300 tons
• One or three points for raising the arch
• Swivel axle with pin with crown or roller bearing
• Copper or aluminum conductive console
• Detachable Fe-Cu water-cooled upper casing panels and roof panels
• Combined scheme of input raw materials (scrap metal, DRI / HBI, HotMetal,)
• Melt mirror size from 0% to 40% by weight of produced steel in accordance with the selected raw materials
• CBM Index (UHP) from 0.5 to 1.5 MVA / t
• From one to several baskets for loading
• Exhaust systems with bottom outlet or discharge chute
• Individual design and calculation of the production process technology in accordance with the assortment of filling and ligatures.

Distinctive features of the design of an electric arc furnace

• Modern technical solutions for integrated heating of scrap metal and electric arc furnace
• Ultra High Chemical Power Consumption (UHChP)
• Integrated fuel engineering solutions
• Integrated technical solutions for the introduction of master alloys (carbon, lime, FeSi, Al powder, etc.)
• System to control slag removal from an electric arc furnace and increase overall productivity.
• The strengthened design of the water-cooled elements for increase of safety and increase in term of operation
• Integrated electrode monitoring system.
• Integrated control of the smelting process.
• Integrated system to optimize furnace operation.