Ferrosilicon is widely used in steelmaking and casting fields, it has good deoxidizing and inoculation effects, so as to improve the technological level. The ferrosilicon specifications has a great influence on the properties of steel. The silicon content in general steel is 0.15%-0.35%, the structural steel contains 0.40% to 1.75% silicon, the tool steel contains 0.30% to 1.80% silicon, the silicon in spring steel is 0.40% to 2.80%, the content of silicon in stainless acid-resistant steel is 3.40% to 4.00%, the silicon 1.00%～3.00% in heat-resistant steel and the silicon steel contains 2% to 3% silicon or more. Therefore, before purchasing ferrosilicon, we first need to understand your requirements for ferrosilicon specifications, and then communicate with the manufacturer to help you purchase.
Different grades of ferrosilicon specifications
| Model | Chemical Composition (%) | |||||
|---|---|---|---|---|---|---|
| Si | Mn | Al | C | P | S | |
| FeSi75A | 75.0-80.0 | ≤0.4 | ≤2.0 | ≤0.2 | ≤0.035 | ≤0.02 |
| FeSi75B | 73.0-80.0 | ≤0.4 | ≤2.0 | ≤0.2 | ≤0.04 | ≤0.02 |
| FeSi75C | 72.0-75.0 | ≤0.5 | ≤2.0 | ≤0.1 | ≤0.04 | ≤0.02 |
| FeSi70 | 72.0 | ≤2.0 | ≤0.2 | ≤0.04 | ≤0.02 | |
| FeSi65 | 65.0-72.0 | ≤0.6 | ≤2.5 | —— | ≤0.04 | ≤0.02 |
Different ferrosilicon manufacturers produce slightly different ferrosilicon specifications. Common ferrosilicon is mainly 75#, 72#, 65#, 45#. China is the largest exporter of ferrosilicon now, and ferrosilicon 75# is the main export product. These ferrosilicons are used in the production processes of steelmaking and casting of users all over the world.
Different prices of ferrosilicon specifications
The main raw material for the production of ferrosilicon is quartz stone, which is smelted in an electric furnace by using carbonaceous raw materials (mainly semi-coke) as a reducing agent, then smelted using an electric furnace. The price of different ferrosilicon specifications is also different, and the factors affecting the price mainly include the price of raw materials, electricity cost, transportation cost, and regional policies. Under the influence of environmental protection policies, the government will require ferrosilicon manufacturers to limit production, which will then cause a shortage of ferrosilicon in the market, resulting in changes in the market price of ferrosilicon.
All in all, if you need to buy a ferrosilicon, then you must pay attention to clearly understand the ferrosilicon specifications you need before purchasing, so as to better communicate with the manufacturer. In addition, the prices of different ferrosilicon specifications are not the same. If you want to buy ferrosilicon at a lower price, you should avoid the busy season and choose to purchase in the off-season.