Hot metal pre-treatment plantsPrimary products
What makes all the difference to steel production in BOF shops is the hot metal quality. That's why the first step in a successful steel production line is removing unwanted elements from the hot metal. That is what SMS group HMP (Hot Metal Pre-treatment) plants do. We supply tried-and-tested technologies for fast, efficient pre-treatment:
• Deep injection process for removing silicon, phosphorus and sulphur (HMP-PI)
• Mechanical stirring process for removing sulfur (HMD-KR – Hot Metal Desulfurization-Kinetic Reactor)
SMS group supplies two basic HMP plant concepts that cover all capacity and productivity requirements. You select the optimum plant to suit your specific conditions and targets.
A range of different metallurgical reagents can be injected through a refractory-coated lance immersed into the hot metal.
Typically lime, calcium carbide and magnesium are used for desulfurization. In case of disiliconization or dephosphorization iron oxide is used. Reagents are pneumatically conveyed – that is via a carrier gas which creates an overpressure in the pipeline. They are transferred by mono or co-injection technologies.
Our latest Twinjection® allows a high injection rate without compromising efficiency.
- One treatment position
- One injection lance system
- External or integrated deslagging station
- Compact design
- Lower investment cost
- Standard capacity
- Two treatment positions
- Two injection lance systems
- Short cycle times
- One external or two integrated deslagging stations
- Maximum capacity
Classic hot metal pre-treatment involves injecting one or two metallurgical powders into the pig iron in a carrier gas. In this precisely controlled process refractory-coated lances are used.
- Removal of silicon
- Rremoval of phosphorus
- Very low sulphur end contents
- Short treatment times
- Economically optimized process control
- Smooth injection
In order to ensure the efficiency and flexibility of hot metal desulphurisation, desulphurisation agents are injected in mono- or co-injection processes. For the co-injection process, a plant must have different hardware configurations. These ensure that desulphurization agents are fed quickly and that desulphurization is carried out as efficiently as possible.
- Co-injection of two agents
- ECO-injection of three agents for better cost-effectiveness
- TWINJECTION®, two separate injection lines for co-injection in one lance and minimum injection time
Commonly used injection agents such as calcium carbide or magnesium are often in short supply and therefore expensive. For this reason, SMS group offers an alternative technology in which inexpensive agents can be used for hot metal desulphurization: Instead of injection via immersion lances, a rotating stirrer mixes the liquid pig iron with the desulfurization agent.
- Very low sulphur end contents
- Cheap desulfurization agents
- High efficiency
SMS group GmbH
Head of Technical Sales and Project Planning - Secondary & Tertiary Metallurgy, Metallurgical Plants and Environmental Technology
: +49 211 881-8164
Fax : +49 211 881-8264
SMS group UK Support Office
Director Sales & Process Technology
Suite G2, Northwich Business Centre, Meadow Street
CW9 5BF Northwich, Cheshire
: +44 1606 551421