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1. PIG IRON TREATMENT

PIG IRON MARKET OVERVIEW

The integrated plants are currently present in a scenario where good-quality raw materials for reduction processes are increasingly scarce and expensive. This context is favorable to the use of ores and fuels with higher contents of contaminants. On the other hand, client requirements as for steel quality are increasing, what results in difficulties to manufacture some types of products, such as nodular and special iron, intended for casting or fine steel plants to supply the market of special pipes or plates. This is not about sulfur only. Phosphorus also causes problems at the Blast Furnace operation.


TECNOSULFUR SOLUTION

With the purpose of performing the processes for primary refining of pig iron, TECNOSULFUR offers a full line of desulfurization, dephosphorization and desiliconization agents for application in ladles. The products are customized to be used in accordance with the requirements of each process. The agents are made of calcium oxide, calcium carbide, metallic magnesium and others. Tecnosulfur also supplies the equipment required to apply these products, such as agent addition or injection systems. The operation projects, assembly, start-up and follow-up are made by a specialized team.

In addition to its recognized quality, TECNOSULFUR provides its clients with enhanced products which comprehend a precise technical diagnosis, follow-up of the application by specialized technicians and after-sale services, what ensures customer satisfaction.


TECNOSULFUR ADVANTAGES

TECNOSULFUR line of desulfurization, dephosphorization and desiliconization agents has as main purpose to remove sulfur and phosphorus from the metal, in addition to carrying out desiliconization when necessary, enabling thus the manufacture of the finest pig iron. The products are applied by means of deep injection in ladles through the use of refractory spears and carrier gas. We mention the following main advantages: lower specific consumption, high rates of desulfurization or dephosphorization, high treatment speed and low cost per treated ton.


OUTCOMES

  • Removal of sulfur and phosphorus at extremely low levels, what allows for the manufacture of fine steels and demanding applications;
  • Desulfurization and dephosphorization rates over 90%;
  • The pig iron is treated with specific, cost-effective low consumption of the agent, what allows for the use of lower-quality raw materials in the Blast Furnace;
  • Treatment time tailored to each process.

2. ELECTRIC STEEL MILLS

ELECTRIC STEEL MILL OVERVIEW

Due to their versatility, electric steel mills have been increasingly employed to manufacture high-carbon and low-carbon, structural, special alloy and mechanical construction steels, which have high requirements of resistance, toughness and purity. However, the inappropriate quality of the raw materials employed increases the process difficulties due to the presence of harmful residual elements, such as sulfur, phosphorus, hydrogen, nonmetallic inclusions of SiO2 and Al2O3, among others.


TECNOSULFUR SOLUTION

With the purpose of serving electric steel mills, TECNOSULFUR offers a full line of sintered synthetic slags and customized tundish covering powders, which act on a specific manner in each process. Such products are made of calcium aluminates, calcium and magnesium silicates, pseudo silicates and aluminates and others.

In addition to its recognized quality, TECNOSULFUR provides its clients with enhanced products which comprehend a precise technical diagnosis, follow-up of the application by specialized technicians and after-sale services, what ensures customer satisfaction.


TECNOSULFUR ADVANTAGES

The main purpose of the TECNOSULFUR line of sintered synthetic slags is to remove undesired elements in the steel (S and nonmetallic inclusions) and prevent hydrogen pick-up. They are employed in ladle furnaces with excellent spreadability, performing also other important functions in the secondary refining of steel, such as: they protect the hot metal by avoiding its contact with the atmosphere and, consequently, the absorption of undesirable gases and minimization of thermal losses, making the temperature drop to which the steel is subject more controllable; prevent the exposure of the electrode electric arc during the heating in ladle furnaces, reducing thus the wear of the refractory lining and the vault; reduce the tap to tap and consequently the consumption of electricity; form a coating in the ladle, what extends the service live of the refractory linings; reduce the flicker effect due to a higher stability of the electric arc. Furthermore, the sintered synthetic slags allow for the manufacture of steels with reduced contents of hydrogen, even in plants with no degassing equipment.


OUTCOMES

  • Deep removal of nonmetallic inclusions, what allows for the manufacture of special steels;
  • High desulfurization rates;
  • Possibility of manufacturing steels with hydrogen content lower than 5.0 ppm;
  • Significant increase in the service live of ladles;
  • Reduction in the consumption of electrodes;
  • Reduction in the consumption of electricity.

3. INTEGRATED PLANTS – PRIMARY REFINING

INTEGRATED PLANT OVERVIEW

The integrated plants are currently present in a scenario where good-quality raw materials for reduction processes are increasingly scarce and expensive. This context is favorable to the use of ores and fuels with high contents of contaminants, what requires treating the pig iron before sending it to the steel mill, since its cost is lower than the procedures carried out in ladles during the refining stage. When performed in the intermediate stage between the Blast Furnace and the Steel Mill, the treatments provide the plants with a great versatility, upon enabling the manufacture of several types of steels, even those with strict requirements


TECNOSULFUR SOLUTION

With the purpose of performing the processes for primary refining of pig iron, TECNOSULFUR offers a full line of desulfurization, dephosphorization and desiliconization agents for application in torpedo cars or ladles. The products are customized to be used in accordance with the requirements of each process. The agents are made of calcium oxide, calcium carbide, metallic magnesium and others. Tecnosulfur also supplies the equipment required to apply these products, such as agent addition or injection systems. The operation projects, assembly, start-up and follow-up are made by a specialized team.

In addition to its recognized quality, TECNOSULFUR provides its clients with enhanced products which comprehend a precise technical diagnosis, follow-up of the application by specialized technicians and after-sale services, what ensures customer satisfaction.


TECNOSULFUR ADVANTAGES

The line of TECNOSULFUR desulfurization and dephosphorization agents has as main purpose the removal of sulfur and phosphorus from the metal, resulting in the manufacture of fine steels. The agents are applied by means of deep injection in torpedo cars or ladles through refractory spears and carrier gas. We can mention the advantages: lower specific consumption, high rates of desulfurization, high treatment speed and low cost per treated ton.


OUTCOMES

  • Removal of sulfur and phosphorus at extremely low levels, what allows for the manufacture of fine steels and demanding applications;
  • Desulfurization and dephosphorization rates over 90%;
  • The pig iron is treated with low specific consumption of agents, ensuring more cost-effectiveness, what enables the use of lower-quality raw materials in the Blast Furnace;
  • Tailor-made treatment time for each process.

4. INTEGRATED PLANTS – SECONDARY REFINING

INTEGRATED PLANT OVERVIEW

The secondary refining processes are essential in the production flow of an integrated plant, because it is a fine tuning point concerning the quality required by different types of steel. Additionally, it establishes the productivity pace of both the primary refining and the casting. We consider that any risk of the presence of contaminating elements at this point may indicate the manufacture of unsuitable steel, entailing financial and operating losses.


TECNOSULFUR SOLUTION

With the purpose of performing the processes for secondary refining of steel mills, TECNOSULFUR offers a full line of customized sintered synthetic slags, with specific performance in each process. Such products are made of calcium aluminates, calcium and magnesium silicates, pseudo silicates and aluminates, and others. In addition to the slags, TECNOSULFUR supplies micropulverized products for deep injection in the steel, allowing for desulfurization and control of inclusions. The equipment required to apply these products, such as agent addition or injection systems, are offered too. The operation projects, assembly, start-up and follow-up are made by a specialized team.

In addition to its recognized quality, TECNOSULFUR provides its clients with enhanced products which comprehend a precise technical diagnosis, follow-up of the application by specialized technicians and after-sale services, what ensures customer satisfaction.


TECNOSULFUR ADVANTAGES

The main purpose of the TECNOSULFUR line of sintered synthetic slags is to remove undesired elements in the steel (S and nonmetallic inclusions) and prevent hydrogen pick-up. They are employed in ladle furnaces with excellent spreadability, performing also other important functions in the secondary refining of steel, such as: they protect the hot metal by avoiding its contact with the atmosphere and, consequently, the absorption of undesirable gases and minimization of thermal losses, making the temperature drop to which the steel is subject more controllable; prevent the exposure of the electrode electric arc during the heating in ladle furnaces, reducing thus the wear of the refractory lining and the vault; reduce the tap to tap and consequently the consumption of electricity; form a coating in the ladle, what extends the service live of the refractory linings; reduce the flicker effect due to a higher stability of the electric arc. Furthermore, the sintered synthetic slags allow for the manufacture of steels with reduced contents of hydrogen, even in plants with no degassing equipment.

The micropulverized desulfurization agents made of calcium oxide will enable desulfurization treatments and control of inclusions.


OUTCOMES

  • Deep removal of nonmetallic inclusions, what allows for the manufacture of special steels;
  • High desulfurization rates;
  • Possibility of manufacturing steel with hydrogen content lower than 5.0 ppm;
  • Significant increase in the service live of ladles;
  • Reduction in the consumption of electrodes;
  • Reduction in the consumption of electricity.

5. INTEGRATED PLANTS – CONTINUOUS CASTING

INTEGRATED PLANT OVERVIEW

Due to the constant technological evolution, since the continuous casting pieces of equipment are placed at the end of the steel manufacturing chain, they are extremely strategic points in integrated plants.


TECNOSULFUR SOLUTION

With the purpose of serving the continuous casting processes of electric steel mills, TECNOSULFUR offers a full line of customized tundish covering powders to act on a specific manner in each process. Such products are made of calcium aluminates, calcium and magnesium silicates, pseudo silicates and aluminates, and others.

In addition to its recognized quality, TECNOSULFUR provides its clients with enhanced products which comprehend a precise technical diagnosis, follow-up of the application by specialized technicians and after-sale services, what ensures customer satisfaction.


TECNOSULFUR ADVANTAGES

The TECNOSULFUR line of covering powders has as main purpose to remove nonmetallic inclusions. They are applied in the tundish on the hot metal with excellent spreadability, also performing other important functions such as: they protect the hot metal by avoiding its contact with the atmosphere, what minimizes the thermal losses; reduction of the refractory wear of the tundish, what extends its service life; and improvement in operating conditions. The covering powders are tailor-made for each application. Therefore, they have a melting point proper to the process, preventing the formation of slabs or the excessive melting of the product.


OUTCOMES

  • Deep removal of nonmetallic inclusions, what allows for the manufacture of special steels;
  • Protection of the steel against reoxidation;
  • Reduction of thermal losses;
  • Melting point adequate to each process;
  • Protection of the refractory lining;
  • Extension of the tundish service life.