目前,我国生产的普通硅铁中铝、钙等杂质含量较高,均在2%以上,作为孕育剂加入合金铸件中,易产生皮下气孔等铸造缺陷,作为合金剂直接影响到硅钢质量。为了排除硅铁中铝、钙杂质元素的干扰,国外研制出了硅系铁合金新品种——低铝硅铁。因属专利,具体研制及生产工艺情况无法了解。一九八○年南京铁合金三厂接受了南京市科委下达的这一新产品的研制任 At present, ordinary ferrosilicon produced in our country has a high content of impurities such as aluminum and calcium in the ferrosilicon, all of which are more than 2%. As an inoculant, they are added to the alloy castings to easily cause casting defects such as subcutaneous pores, which directly affect the quality of the silicon steel. In order to rule out the interference of ferrosilicon in the aluminum, calcium impurity elements, developed a new breed of silicon-based ferroalloy - low aluminum ferrosilicon. Due to patents, the specific development and production process can not understand. In 1980, Nanjing Iron Alloy Factory accepted the development of this new product issued by Nanjing Science and Technology Commission