Blast Furnace Enlargement and Optimization of Manufacture Process Structure of Steel Plant

The blast furnace is the most intensive process unit for energy and matter in steel plant.It has a significant influence for material flow network construction,energy flow network construction and operation on the rationalization in steel plant.For a modern steel plant,the function of the blast furnace not only produces the high quality hot metal by reduction reaction,but also accompanies energy conversion and a lot of input and output of information.So the reasonable production capacity,reasonable volume and reasonable layout of blast furnace should be evaluated comprehensively under the optimization of manufacture process structure in steel plant.Based on the analysis of international development tendency of the blast furnace,compares the main technical economic specifications of Shougang Jingtang's 5 576 m3 BF to Qiangang's 4 080 m3 BF,it can gain similar hot metal output both 2×5 576 m3 BF and 3×4 080 m3 BF,but 2×5 576 m3 BF has obvious advantages in investment reducing,energy saving and information control.Therefore,in order to optimize the steel manufacture process,promote the competitiveness in market,enlargement of blast furnace is a significant tendency.However,that is not better to accelerate enlargement of single blast furnace,moreover to achieve "the biggest".Enlargement of blast furnace should be based on optimization of products structure,material flow structure,energy flow structure and the dynamic operation.The general trend is appropriate that furnish 2 to 3 blast furnaces for a high efficiency and low cost steel plant,and thus according to the top designing,the reasonable volume,rational sets,as well as reasonable layout of blast furnaces will be achieved.This tendency not only suitable for large-scale enterprise for flat products production,but also suitable for medium and small-scale steel plant for bar or wire rods production.