Causes of Excessive Slag in Ferrosilicon Smelting Furnace

Causes of Excessive Slag in the Ferrosilicon Smelting Furnace

1. In ferrosilicon smelting, sometimes the furnace is short of carbon for a long time, and a large amount of excess silica dissolves to form viscous slag, which is not easy to eliminate.

2. Due to the high charge level, the depth of electrode inserted into the charge becomes shallow, the furnace temperature is low, and the slag is not easy to be removed. In particular, the electric furnace with a small capacity is more likely to produce this phenomenon, resulting in too much slag in the furnace.

3. Although the amount of slag is small when smelting ferrosilicon, the slag shall be brought out as far as possible during tapping to make the electrode deeply inserted. If you don't pay attention to slag, it will cause too much slag in the furnace for a long time.

4. Poor quality of raw materials, such as too high ash content in coke or too much soil on the surface of silica, will also increase the amount of slag.

Hazards of Excessive Slag in the Smelting Furnace:

1. The bottom of the furnace rises, it is difficult to insert deeply after clicking, it shrinks after drying, the air permeability of the charge surface deteriorates, and the furnace condition deteriorates.

2. The furnace bottom temperature is low, the taphole is not easy to open, the furnace hole is not unblocked, the flow rate of molten iron is slow, and the amount of iron is less.