How many tons of iron ore is required to produce 1 ton of sponge iron?

You create sponge iron from pig iron not directly from Iron ore.Pig iron extracted is 40 to 60% in mass of the iron ore depending upon the purity of the iron ore,rest slag that’s settles at the bottom of the furnace during smelting. .Now sponge iron mass is 90 to 95% of the pig iron used. If you want 1 ton of sponge iron,you need around 1.05 tons of good quality pig iron and 2.10 tons of good quality iron ore.Remember you should use good quality of coke and lime stone during the smelting process of pig iron too.