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Ferrosilicon alloy is a deoxidizer used in steelmaking production. It improves the shape of inclusions and reduces the content of gas elements in molten steel. It is an effective new technology to improve steel quality, reduce costs, and save aluminum. It is especially suitable for the deoxidation requirements of continuous casting molten steel. Practice has proved that it not only meets the deoxidation requirements of steelmaking, but also has desulfurization performance and has the advantages of large specific gravity and strong penetrating power.
The production of silicon-aluminum ferroalloy can be divided into the following three stages
1. Generation of silicon carbide
At lower temperatures, SiO2 reacts with carbon to produce silicon carbide,
2. Generation of aluminum oxide carbides and carbides
In the temperature range of 1600~2000ºC, carbon reacts with aluminum oxide to form aluminum oxide and silicon carbide;
3. Intermediate compounds such as carbides decompose silicon-aluminum-iron to form. At a higher temperature, aluminum oxide, silicon carbide, aluminum carbide and silicon dioxide react to obtain silicon-aluminum; only high-quality silicon-aluminum ferroalloy can produce high-quality silicon-aluminum iron blocks. When purchasing silicon-aluminum iron balls, you need to pay attention to Its quality, the quality of silicon aluminum iron ball has a direct impact on its application.
| Grade | Al | Si | C | P | Cu | Ti |
| FeSiAl | ≥38 | 20-25 | <1.5 | <0.1 | <0.05 | 1.2-2.5 |
| FeSiAl | ≥35 |
25-30
|
<1.5 | <0.1 | <0.05 | 1.2-2.5 |
| FeSiAl | ≥30 | 30-35 | <1.5 | <0.1 | <0.05 | 1.2-2.5 |
| FeSiAl | ≥25 | 25-35 | <1.5 | <0.1 | <0.05 | 1.2-2.5 |
| FeSiAl | ≥48 | 15-20 | <1.5 | <0.1 | <0.05 | 1.2-2.5 |
The deoxidation effect is good. It is generally believed that complex deoxidation products are generated and the oxidation activity is reduced, which is conducive to the deoxidation reaction. In addition, it is easy to generate a low melting point phase, making inclusions easy to polymerize and float away. When aluminum and ferrosilicon (FeAl30Si20) are used for deoxidation respectively, the total aluminum content in the steel is higher than that of the latter, while the acid-soluble aluminum of the latter is higher than that of the former. This shows that when ferrosilicon is used, the aluminum oxide inclusions are greatly reduce.
Example with Ferro Silicon:
1. Packed in bags with a net weight of 1 ton, which are strong, weatherproof and sturdy.
2.The bags are filled with steel forks to prevent debris from being mixed in.
3.Fill it up and measure it to make sure it's the right size.
4.Ferrosilicon is loaded, you can see that our ferrosilicon is even in color without impurities, the quality is very good!
5.Weighing. Each bag is weighed before it is sealed, and the actual weight of a ton is usually between 1003 and 1005kg.
6.Sealing. Each bag is sealed for traceability.
7.Loading. Transportation from the factory to the port.
8.Marking. According to customer's requirement, the tonnage bag can be marked.
9.Crating. Each container can hold 20-27 tons of goods.
Q: Are you a factory or a trading company?
A: We are factory and trading company.
Q: Do you have quality control?
A: Yes, we are SGS certified. Our products are traceable from production to processing to testing, and every process is supervised to ensure the quality of goods.
Q: What are your delivery terms?
A: We accept FOB, CIF and other delivery methods, or the customer proposes his delivery method, these are negotiable.
Q: What is your delivery time?
A: If the goods are in stock, it usually takes 7-14 days; if the goods are not in stock, it takes 25-45 days, depending on the quantity the customer needs.
Q: Can you provide free samples?
A: Yes, we can provide 2kg samples for free!
Q: What are your payment terms?
A: 30% deposit, 70% balance on bill of lading. Of course this is negotiable.
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