requirements for raw materials in the production of Si-Ca all
About silicon calcium alloy, I think many people have heard it. It mainly has two physical states, block and powder. Silicon calcium alloys are mainly used in the steel industry. Today I will share some knowledge about silicon calcium alloys.
Silicon calcium alloy
The silicon calcium alloy is mainly composed of two elements of silicon and calcium. The amount of Ca is generally between 24-31%. The amount of Si contained is between 55-65%. Silicon calcium is often found in steelmaking in the form of cored wire.
Silicon calcium alloys are commonly used in these areas:
1. Calcium silicon is an effective deoxidizer and desulfurizer. Used to produce high grade steel. Silicon itself is a powerful deoxidizer. But in comparison, calcium is more powerful.
In addition, calcium silicon can be used to control the shape, size and distribution of oxide and sulfide inclusions.
2. silicon calcium alloy can also be used as an inoculant for cast iron.
3. Can be used as an additive in the production of ductile iron.
4. Silicon calcium can be used for deoxidation instead of aluminum. Effectively change the properties of steel. For example, the toughness, plasticity and fluidity of steel. Therefore, silicon calcium is an ideal deoxidizing material. At the same time, it can also be used as a warming agent in some environments.
Requirements for raw materials in the production of silicon calcium alloy
The raw materials for smelting silicon calcium alloys are silica, lime, coke, wood (or charcoal) and bituminous coal.
Silica:
The SiO2 content is required to be greater than 98%. The Al2O3+Fe2O3 content is less than 1%. The less other impurities, the better. The surface should not be stuck with soil or other impurities, and the water absorption rate is less than 5%. The silica furnace has a particle size of 30-60 mm. Where the portion larger than 60 mm and smaller than 30 mm is less than 5%.
Lime:
The CaO content is greater than 85%. The Al2O3 content is less than 0.5%. The Fe2O3 content is less than 0.3%. Do not mix raw and burned. The furnace particle size is 10-15 mm.
Coke:
The coke fixed carbon should be greater than 80% and the ash content should be less than 15%. The furnace particle size is 3 to 5 mm. The coke breeze should be less than 10%.
Charcoal fixed carbon is greater than 75% and ash is less than 2%. The volatile matter is less than 20% and the moisture is less than 10%. Do not mix raw wood, powder and other impurities. The block size is 20 to 80 mm.
Block:
Use ordinary pine wood without bark. The thickness is greater than 20mm and the length is less than 200mm. Where the thickness is less than 20mm, it should be less than 5%.
Bituminous coal:
The ash content is required to be less than 8% and the moisture content is less than 10%. Do not mix with other impurities. Have good sintering properties. The furnace particle size is 0 to 13 mm.
Silicon calcium alloys are used in a wide variety of applications. The silicon-calcium alloy of our factory has uniform particle size and high purity. The factory has always been well received by customers.
Wanhua Metal is a professional producer and supplier of silicon calcium. Factory direct sales, the price is competitive. If you have any needs in this regard, please contact us by email.
