With the all-round nationalization of hydro cracking catalyst in China, quick nationalization of hydrocracking pre-refining catalyst became an critical issue.
随着我国加氢裂化催化剂全面实现国产化，迅速实现加氢裂化预精制催化剂国产化成为当代一个重要课题。
Two categories of APC pre estimation methods are presented with examples relating to refining issues in this connection: statistical rules and the steady state gain optimization method.
为此列举炼油装置的示例，介绍了两类预估先进控制经济效益的方法，即统计分析法和静态增益优化法。
The measures of controlling aim carbon content and pre-deoxidation, consolidating refining deoxidation and light blow after steel tapping, protective casting, etc.
通过采用控制出钢终点碳和预脱氧，加强精炼脱氧和出钢软吹，做好保护浇注等措施，降低了钢中氧含量。
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