Introduction to ferrosilicon
Ferrosilicon, generally refers to coke, steel chips, quartz (or silica) as raw materials, ferrosilicon alloy made of electric furnace smelting, it is often widely used as a deoxidizer in iron and steel smelting industry. Here's a good look at ferrosilicon:
1. classification: ferrosilicon manufacturers to receive ferrosilicon according to the smelting method is divided into high silicon ferrosilicon (GG), ordinary ferrosilicon (PG), low aluminum ferrosilicon (DL) and high purity ferrosilicon (GC) four categories. High purity ferrosilicon refers to the ferrosilicon with low impurity content produced by outside - furnace refining.
2. brand expression method: the first two represent the classification of ferrosilicon: high silicon ferrosilicon (GG), ordinary ferrosilicon (PG), low aluminum ferrosilicon (DL) and high purity ferrosilicon (GC); Then there are code names for ferrosilicon products, such as FeSi; This is followed by the amount of silicon that controls the lower limit (mass fraction). For example, 97 represents a lower limit of 97%; This is followed by the content (mass fraction) representing the major impurity elements and the resulting control upper limit, such as Al1.5 representing the major impurity element as aluminum with A control upper limit of 1.5%, followed by the classification representing the minor impurity element content (A/B/C), limited to high purity ferrosilicon.
3. chemical composition requirements: according to the difference of silicon and its impurity content (mass fraction) and use, ferrosilicon is divided into four categories of 40 brands, including 9 brands of high silicon ferrosilicon, 10 brands of ordinary ferrosilicon, 8 brands of low aluminum ferrosilicon, 13 brands of high purity ferrosilicon.
4. the physical state requirements: the thickness of FeSi72~FeSi75 series of various brands of ferrosilicon ingot produced by iron casting shall not exceed 100mm; The thickness of FeSi40, FeSi65 and FeSi70 ingot shall not exceed 80mm, or the ferrosilicon shall be cast by direct forming process, and the segregation of silicon content shall not exceed 3.0%.