From November 2 to November 3, 2011, Allied Rongda company took whole lining shotcrete construction on the 2#680m³ Blast Furnace in Chengde Shengfeng Iron and Steel Group. It took 24hours continuous shotcrete in the construction. 179 tons of materials were used, and the rebound rate was 4.5%, with a leveling and smooth surface. The furnace shape recovered well, which received party A’s acceptance.
