Features & shortcomings of submerged arc furnace lining’s performance improvement

Submerged arc furnace’s shortcomings

1.Wide joint method

The width of the brick joint is eroded and consumed by molten iron. The molten iron penetrates under the carbon bricks, gradually causing the carbon bricks to rise, causing damage to the furnace lining.

2.Seamless method

In fact, it’s not really seamless. The molten iron flows down the cracks between the bricks and reaches the bottom of the carbon bricks, gradually causing them to float up and causing the entire furnace lining to fail and be scrapped.

3.Overall ramming method

Because cold ramming does not undergo high-pressure compaction and vacuum roasting processes like carbon bricks, its performance is far inferior to that of pre-baked carbon bricks. Thus, its service life is very short, generally not exceeding one year. But this method has low cost and short construction period.

Ferroalloy furnace's improvement

After years of production practice, there has been a new method. 

On the basis of the original seamless method of carbon bricks, the carbon bricks are reprocessed into annular grooves and concave structures, and the characteristics of self-baking carbon materials are used ingeniously to connect the carbon bricks, including the same layer and interlayer, so as to block the molten iron. The gap between penetration and horizontal penetration connects the carbon bricks of the entire furnace lining into a whole. The furnace lining not only has the excellent performance of carbon bricks, but also has the integrity of the third integral tamping method, which better solves the current problems.