17/06/2026
Enthusiasm and Health & Safety!:
Most of the photographs in the museum from the RTB era are well identified, but our main photo on this post, just had a date - July 1960. The photo appeared to show a crowd of onlookers getting a bit too near a Steel Convertor, wearing limited PPE ( Personal Protective Equipment), when the crane driver was pouring 25 tons of molten Iron at 1500 deg C from a ladle into a Convertor!
It needed a bit of research and the answer was found in the Ingot News, the RTB Company Newspaper. This must have been the first cast of a new Steelmaking operation in Ebbw Vale, the LD process.
Ebbw Vale had produced Steel in Ebbw Vale since 1868 and one of the processes used throughout that period was the Bessemer Process. That process involved blasting air through holes in the bottom of a vessel containing Molten Iron and in simple terms, this burnt off the excess Carbon to produce Steel. It had always had a couple of disadvantages compared to other Steelmaking methods, one of which is that the Steel picked up Nitrogen from the air, which is a disadvantage, when trying to produce steels required for Deep Drawing applications. Since 1957, Ebbw Vale had tried to circumvent this issue by using a Steam & Oxygen mix rather than Air i.e No Nitrogen. This was a move in the right direction but the improved Bessemer process could still not produce the Deep Drawing Steels produced in the Open Hearth process. The issue was that the Open Hearth process was a much slower process and Ebbw Vale needed more tons and significantly, more “High Quality Tons”!
So RTB turned to the LD (Linz Donawitz) Process, invented by a Swiss Engineer and introduced in a Steel Plant in Austria, the process being named after the two Austrian towns at which it was first installed.
The primary difference was that the LD process introduced the Oxygen from the top of the convertor, through a Copper based Lance at “supersonic” speeds! In addition, Lime could be introduced through the lance, solving another Ebbw Vale problem , the reduction in Phosphorus, which was present in Ebbw Vale Iron from the Blast Furnaces, due to its use of UK sourced Iron Ore that tended to have higher Phosphorus contents than imported ores.
No plant in the UK had introduced LD Steelmaking, but RTB had made the decision that it would their Steelmaking process of choice at their new Steel Plant at Newport, Spencer Works, which was due to be commissioned in 1962. Therefore introducing it in Ebbw Vale in 1960 would solve an Ebbw Vale problem and also gain some experience in the use of the process before its introduction at Spencer Works.
The end result was that it was introduced successfully at both Ebbw Vale and Spencer Works. At Ebbw Vale, the old Bessemer Convertors were removed one by one, and new LD Vessels installed. The process at Ebbw Vale ended in 1975 with the closure of Iron & Steelmaking.
After 1960, LD would become the Steelmaking Process of choice in the whole of the UK for the next 50 years, but the first plant in the UK to use it was
- Ebbw Vale!!
Photos.
1. The first LD cast with a lot of very interested onlookers!
2. Section from the August 1960 edition of Ingot News detailing the successful commissioning of LD Steelmaking at Ebbw Vale.
3. For those interested, we have included a couple of photos that in simplified form show the difference between Bessemer & LD Steelmaking.
Sent from Sky Yahoo Mail for iPhone