Converter Technology

Converter Technology Articles

Strategies for use of superheated steam during stainless steel refining in converters

Steam in stainless steel refining can be motivated by cost savings. In this paper it has been demonstrated that the potential savings are substantial. By the use of UTCAS® converter automation system a number of cases have been simulated to show the typical situations where the use of steam is beneficial.

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Refining of Charge Chrome — a Study of Some Products and Applications

By implementing a converter downstream of the reduction furnace it is possible to broaden the product range significantly. In this paper some process alternatives and their economical, practical and environmental implications are studied using process models developed based on UHT’s long experience in stainless steelmaking, stainless steel process control and charge chrome refining.

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Increased Stainless Steel Melt Shop Yield by Improved Converter Tap Weight Management

Scrap melting in the converter is a vital tool for energy management and tap temperature control. Tapping of highest possible weight from the converter without superseding ladle capacity is a target in high capacity stainless steel melt shops. This paper discusses the fundamentals of using superheated steam in stainless steel refining, and demonstrates how the access to steam enables improved tap weight management.

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Ferro Alloy Design Selection Utilisation and Optimization

In this paper different FeNi and FeCr compositions are discussed and their merits for stainless steelmakers in different situations are compared.

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Strategies for Use of Superheated Steam During Stainless Steel Refining in Converters

Steam in stainless steel refining can be motivated by cost savings. In this paper it has been demonstrated that the potential savings are substantial. However it is necessary to fully understand the stainless steel refining process to utilize the benefits. It is also demonstrated how each and every plant can be analyzed to find their potential benefit by using steam as an additional process gas. By the use of UTCAS® converter automation system a number of cases have been simulated to show the typical situations where the use of steam is beneficial.

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Steam as Process Gas Brings Economic Benefits to Columbus Stainless

Since the reintroduction of steam to the AOD converters at Columbus Stainless in South Africa, crude argon consumption has decreased. The plant no longer has to schedule its production according to argon availability. It has led to improvements in process times and refractory lifetime. Economic analysis has also shown that the cost saving potential is substantial when steam is strategically used in the process.

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Refining of Charge Chrome — a Study of Some Products and Applications

By implementing a converter downstream of the reduction furnace it is possible to broaden the product range significantly. The converter can also successfully be used to strip furnace slag from chromium oxide. Some process alternatives and their economical, practical and environmental implications are studied using process models developed based on UHT’s long experience in stainless steelmaking, stainless steel process control and charge chrome refining.

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Optimised AOD gas administration — a lean process for a green world

By applying a real-time adaptive gas optimization concept the overall carbon removal efficiency is increased while the consumption of reduction agents and slag formers are decreased. This removes unnecessary production costs and minimizes the total emissions of CO2. The work is based on industrially proven process models integrated in the UTCAS® software.

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Ferromanganese Refining in Combined Blown CLU Converter

By adapting models and technologies used in stainless steel making Uvån Hagfors Teknologi AB (UHT) has been able to create an environment for development, process control and production management which is unmatched in the ferroalloy sector. UHT’s solutions include the combined blown CLU® process, the UTCAS® process control system as well as general converter design details and production technologies common in stainless steelmaking but not yet adopted in the ferroalloy sector.

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Columbus Stainless returns to CLU

Columbus Stainless in South Africa, part of the Acerinox Group, refines steel using steam to reduce argon consumption.

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