What is the ferro silicon calcium
Calcium silicon alloy is also called Ferro silicon calcium . It is a deoxidizer and desulfurizer in steelmaking. Its main components are silicon and calcium. Common shapes include calcium silicon block, Ferro calcium silicon particles, calcium silicon cored wire and calcium silicon powder.
Chemical composition and specifications of calcium silicon alloy
| Grade | Ca | Si | Al | C | P | S |
| Ca31Si60 | 31 | 55-65 | 2.4 | 1.0 | 0.04 | 0.05 |
| Ca28Si60 | 28 | 55-65 | 2.4 | 1.0 | 0.04 | 0.05 |
What is the use of calcium silicon alloy?
Adding calcium silicon in steelmaking can remove oxygen and sulfur from molten steel. Oxygen makes steel brittle. Therefore, adding calcium silicon alloy to steel smelting can improve the quality of steel and increase the toughness of steel.
What is silico manganese
Silicomanganese is one of the most common ferrous alloys. Silicon manganese is also used like calcium silica for deoxidation and desulfurization in steelmaking.Its main components are silicon and manganese along with other impurities. Common silicon manganese models are FeSiMn6014 and FeSiMn6517.The main shape of silico manganese alloy is Ferro silicon manganese block.
Chemical composition and specifications of silicon manganese
| Silico manganese code | Chemical composition(%) | ||||
| Mn%Min | Si%Min | C%Max | P%Max | S%Max | |
| FeSiMn6014 | 60 | 14 | 3.0 | 0.3 | 0.04 |
| FeSiMn6517 | 65 | 17 | 2.5 | 0.3 | 0.04 |
| FeSiMn6818 | 68 | 18 | 2.0 | 0.3 | 0.04 |
what is the use of silico manganese ?
In the steelmaking process, silicon-manganese alloys are mainly used for deoxidation and alloying. It can remove oxygen from molten steel and improve the quality of steel. Manganese can also increase the strength and hardness of steel, and silicon can increase the elastic limit of steel and improve its performance. Therefore, silicon manganese is generally used to produce high-grade steel, alloy steel and stainless steel.
What are the advantages of calcium silicon alloy compared with silicon manganese?
Stronger deoxygenation and desulfurization capabilities
- Ferro Calcium silicon alloy deoxidizing ability is stronger than silicon manganese . Because the calcium element in CaSi has a strong deoxidizing ability, it can effectively remove the oxygen content in molten steel and deoxidize more thoroughly. Silicomanganese mainly uses manganese and silicon for deoxidation, and is weak in deep deoxidation ability.
- Desulphurization. Calcium silicon alloy has a stronger desulfurization ability because calcium element has a high affinity for sulfur and can effectively remove sulfur from molten steel. This is a function that silicon manganese basically does not have. Therefore, when producing steel grades that are strict with sulfur content, calcium silicon alloys have more advantages.
Calcium silicon alloy can better improve the quality of steel
- Inclusion morphology control: Calcium silicon alloy can change the morphology of inclusions in steel and spheroidize the inclusions, thereby reducing their adverse effects on the properties of the steel, such as reducing the anisotropy of the steel. Silicon manganese alloy is worse than calcium silicon in this regard.
- Improved toughness and ductility: Because calcium silicon alloy can effectively deoxidize, desulfurize, and improve inclusion morphology, it helps improve the toughness and ductility of steel. In contrast, silicon-manganese alloys mainly focus on increasing the strength and hardness of steel, with limited improvements in toughness and ductility.
This is why calcium silicon alloy has more advantages than silicon manganese in the steelmaking process.