Feldspar is a geological term, one of the most common minerals in the continental crust. Feldspar is a general term for feldspar minerals, which are a common class of aluminosilicate rock-forming minerals containing calcium, sodium and potassium. The proportion of feldspar in the crust is as high as 60%, and it can occur in igneous rocks, metamorphic rocks, and sedimentary rocks. China is rich in feldspar resources. There are dozens of feldspar deposits that have been identified. The larger ones include Hengshan in Hunan, Wenxi in Shanxi, Xintai in Shandong and so on. The feldspar mineral products are mainly supplied to the ceramic industry, glass industry and other fields.