As the name implies, a deoxidiser for steelmaking is a chemical agent used in the steelmaking process to remove unwanted impurities from the steel. It is typically incorporated into the molten steel to guarantee seamless casting and rolling into qualified steel. A specified quantity of deoxidiser is employed for deoxidation purposes, with an adequate amount of alloy added to adjust the chemical composition in line with the requisite steel grade specifications.
The classification of deoxidisers for steelmaking is as follows:
The most commonly used deoxidisers are silicon-manganese alloy, ferrosilicon, ferromanganese, silicon-calcium alloy, silicon-aluminium-barium-calcium, and so on.
The purpose of the deoxidiser is to:
1. This product is suitable for deoxidation in a variety of steelmaking processes, with particular efficacy in converter steelmaking. It has an excellent deoxidation and desulfurization effect, can effectively alter the fluidity of molten steel, and effectively addresses the issue of nodules.
2. The deoxidiser reduces the gas content of steel and the number of inclusions in molten steel. The underlying principle is that the calcium in the product can convert the oxides in the molten steel into deoxidation products with a low melting point that float easily, effectively purifying the molten steel. Furthermore, the product is straightforward to use, the addition rate of the alloy is increased, and the consumption of the alloy can be reduced. This will result in a reduction in the cost of steel raw materials. Furthermore, the economic and social benefits of this product are significant, and it has the added advantage of improving product quality. When used in electric furnaces as a reducing deoxidiser, it can replace silicon powder, silicon, aluminium and barium, thereby significantly reducing the cost of steel smelting.
The following instructions detail the correct procedure for using a deoxidiser in steel smelting.
1. The quantity of the additive is dependent upon the carbon content of the final molten steel, typically within the range of 1.0-1.5 kg/t of steel.
2. The addition method is as follows: the deoxidiser should be added directly to the bottom of the bag before pouring.
3. When removing a quarter of the steel, the usual procedure is to add ferromanganese, ferrosilicon and aluminium. The deoxidiser for steelmaking has a strong deoxidation and desulfurisation effect and can change the fluidity of molten steel well.
