Cape Town Iron and Steel Works (Pty) Ltd., a scrap-based steelmaking company, produces and supplies reinforcing steel in billet and bar forms in South Africa. The company was founded in 1967 and is based in Kuilsrivier, South Africa. As of August 31, 2012, Cape Town Iron and Steel Works (Pty) Ltd. operates as a subsidiary of DHT Africa.
The electric arc furnace process starts with raw material, which in this case is mostly steel scrap. The Cisco meltshop, where the steel is melted, consumes approximately 280 000t of scrap steel annually.
The scrap is processed in a scrap yard adjacent to the plant before it is loaded into scrap buckets which are then charged into the electric arc furnace.
The electric arc furnace melts the scrap down into molten steel. This is achieved by lowering three electrically charged graphite electrodes onto the scrap. When the electrodes are close enough to the scrap, an arc is formed between the electrodes and the scrap. The molten steel is transported to the casting machine were it is cast into billets. The billets are rectangular pieces of steel 120mm x 120mm and 4.5m to 6m long.
The billets are sent to the rolling mill for rolling. Before the billets can be rolled, it has to be heated up to 1 280°C inside the reheating furnace.
The billets are then sent to the rolling mill where they are rolled into rebar. The range of rebar that can be rolled is 8mm to 40mm.
The rolled rebar is cooled down and cut to length. Commercial lengths range from 13m to 6m and stock lengths are available in 13m and 12m. The rebar is then piled into bundles which are strapped and tagged before being placed into the stock yard. A quality management system is implemented and monitors the steel throughout the manufacturing process.