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Siemens and Baosteel cooperate in slag granulation solutions

  • Baosteel Slag Short Flow technology used for granulation of converter and electric arc furnace steel mill slag
  • Joint marketing and project implementation agreed

BSSF plant at the Baosteel subsidiary Ningbo Iron & Steel. Siemens and Baosteel are collaborating on solutions for the granulation of slag from BOF converters and electric arc furnaces. (Copyright: Baosteel)

Siemens Metals Technologies and Baosteel Engineering & Technology Group Co. Ltd., a subsidiary of the Baosteel group, will be cooperating in future in the granulation of slag produced in BOF converters and electric arc furnaces.

Their collaboration focuses on joint marketing and implementation of the Baosteel Slag Short Flow (BSSF) technology in steel mills worldwide, with the exception of China and Korea. The agreement is exclusive for its agreed term. Siemens already offers solutions for slag granulation from pig iron production in blast furnaces.

Slag from steel production in BOF (LD) converters and electric arc furnaces can, for example, be used as material in road or railway track bed construction. In the BSSF granulation process developed by Baosteel, the liquid slag is transferred to a granulation drum where it is treated with injected water with a dwell time between three and five minutes, which significantly reduces the amount of unreacted free lime.

The hermetically sealed vessel and central vapor extraction system ensure that all emissions of dust and hazardous substances are avoided. The process is already in use at Baosteel and several other Chinese steel producers, the Korean Posco group and the Indian JSW company. The batch-wise operating BSSF plants have short process times and a compact design. They achieve a high level of slag and crude steel metal separation, uniform granulation and a consistently high quality in the end products.

Further information about solutions for steel works, rolling mills and processing lines can be found at

The Siemens Industry Sector (Erlangen, Germany) is the world's leading supplier of innovative and environmentally friendly products and solutions for industrial customers. With end-to-end automation technology and industrial software, solid vertical-market expertise, and technology-based services, the Sector enhances its customers' productivity, efficiency, and flexibility. With a global workforce of more than 100,000 employees, the Industry Sector comprises the Divisions Industry Automation, Drive Technologies and Customer Services as well as the Business Unit Metals Technologies. For more information, visit

The Metals Technologies Business Unit (Linz, Austria), part of the Siemens Industry Sector, is one of the world’s leading life-cycle partners for the metals industry. The Business Unit offers a comprehensive technology, modernization, product and service portfolio as well as integrated automation and environmental solutions covering the entire life cycle of plants. For more information, visit
Reference Number: IMT201406608e


Mr. Rainer Schulze
Metals Technologies

Siemens AG

Turmstr. 44

4031  Linz


Tel: +49 (9131) 7-44544

Further information:



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