The main charging belt 5# gallery of 1# 3800m3 BF project for the newly built 2X3800m3 BF & its supporting utilities project of Laiwu Branch of Shandong Iron and Steel Group Co., Ltd, which is EPC contracted by SDM, was hoisted at 14:56 p.m. on November 1, 2020. The completion of main belt 5# gallery hoisting marks the BF charging system and top charging system of BF has been completed, the "point" construction has become the "line" construction, which has laid a good foundation for the installation of main belt conveyor in the next step, and will soon form the "surface" construction.

        Under the joint force of 4000t tower crane and 350t caterpillar crane, after nearly 6 hours of hoisting, the 5# gallery successfully reached the positioning height of 68.90 m, and the overall steel structure installation of the main belt gallery of blast furnace was completed 7 days ahead of schedule. This is the steel structure with the highest hoisting height, heaviest monomer weight and the largest span in the 1#3800m3 BF proper project of Laiwu Branch. The successful installation of 5# gallery has created favorable conditions for the subsequent equipment installation, gallery enclosing and single machine debugging. Meanwhile, it has set a good example for other participating units, so as to facilitate the active operation and construction of other processes.

        The main charging belt gallery of blast furnace starts from the ore charging transfer station on the south side of the stock house, passes through the coke charging transfer station on the south side of the coke tank/bunker, through the main belt driving machine room, and leads to the BF main frame at 68.9m, with a total length of 320m. It is the conveying channel of blast furnace ironmaking raw materials. The corridor is composed of 5 supports and 5 sections of steel structures with dip angle of 10 degrees. The length of each section of the gallery is 64m, 60m, 60m, 56m and 67.85m respectively. Among them, the 5# gallery (the last section) has the largest span and the largest weight, so the hoisting difficulty is the biggest.

Comparison of gallery before and after connection

        In the follow-up construction, the project department will strictly control the safety and quality, strengthen the coordination and cooperation, ensure the high-quality and efficient completion of the follow-up construction project, and deliver satisfactory achievements for the owner.

                                      Hoisting of 5# gallery

                                   5# gallery hoisted in place