Blast furnace is the main method of iron-making in modern and the important link of producing steel. This method is developed and improved through the shaft furnace iron making in ancient. Although various countries in the world have researched and developed many new methods of iron-making, blast furnace iron-making technology with characteristic of good economic index, simple technology, large production, high labor productivity, low energy consumption, the amount of iron produced through this method is still more than 95% of the total world iron production.
