Trace elements in cement and clinker mainly come from raw materials and fuel. Specific element in secondarymaterials might be high.
水泥和熟料中的微量元素主要来源于原燃料，二次材料中个别元素的含量会很高。
2
Most trace elements are solidified in clinker during clinker burning. Usage of secondarymaterials could not obviously influence on environment.
微量元素在熟料烧结过程中大部分会固化在熟料中，目前看来，利用废弃物不会对环境造成显著的影响。
3
This paper on the industrial processing method of traditional pestle tea. Process technology and condition of primary and secondarymaterials was introduced.