| 摘要 |
PURPOSE:To enable the use of a large amt. of pellets without giving adverse influence on the operation of a blast furnace by mixing the pellets beforehand uniformly with sintered ore within a range of specific ratio, charging the same into the blast furnace and operating the blast furnace. CONSTITUTION:Two systems of belt conveyors 18, 18 are installed over an ore storage tank 17. Sintered ore 11 and pellets 12 are carried by said conveyors simultaneously into said tank, where both materials are mixed uniformly to prepare the raw materials to be charged into a blast furnace. These raw materials are supplied through the conveyor 18, an intermediate hopper 13 and the conveyor 18 into a charger 16 for blast furnace materials provided with a small bell 14 from a swiveling chute 15. The mixing ratio of the ore 11 and the pellets 11 is kept within the range wherein the amt. occupied by the pellets 12 in the total amt. of both is 25-50wt%. The mixing ratio is controlled by changing the speeds of the conveyors 18, the weights of the raw materials to be transported, the positions of the conveyor heads, etc. |
