Abstract: Method of lining a steel-making furnace which comprises lining the bottom area of the furnace with bricks to form a first lining, lining at least a portion of the wall area of the furnace with bricks and/or a water cooling box to form a second lining, lining the first lining and a lower portion of the second lining with a first refractory material, applying a second refractory material to an upper portion of the second lining above the lower portion before heating the furnace, and then heating the second refractory material to cause hardening thereof. The second refractory material comprises magnesium oxide, green chromium oxide, clay, a phosphate, a bisulfate and water. The use of this composition for the second refractory material results in a substantial increase in the durability of the furnace lining.