The stainless steel annealing and pickling process can product large quantity of waste mixed acid(HF/HNO3) that must be treated through acid purification system.
不锈钢生产退火酸洗过程会产生大量废混酸（HF/HNO3），通过酸净化系统对废酸进行处理。
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This article discuss the principle of the fluorination about vinylidene chloride and HF, and the technology require of fluorination reactor, optimize process data and waste water treatment technology.
The essential properties of Zirconium, preparation of Hf, process for producing Hf wire, and some noteworthy matters in process were briefly introduced.