Abstract: Pure-calcium corded wire feeding process in 180t ladle was developed by theory calculation and industrial experiments. The calculation results indicated that the wire feeding speed should be more than 1.48m/s with the corded wire of the diameter of 9mm and the core skin thickness of 0.75mm. Industrial experimental results showed that the calcium yield increased with the decrease of the feeding speed at the range of 2-3m/s, and maximum calcium yield was 26.9% when the feeding speed was 2m/s. In comparison with ferro-calcium corded wire feeding process, the calcium yield increased by 16.9%, and the wire feeding cost decreased by 6.4 yuan using pure-calcium corded wire feeding process.

Key words: Pure-calcium Corded Wire, feeding speed, the yield of calcium, cost