The techniques of sinter charging to BF by size grading, and BF return fines screening were the first time employed in our country by ANGANG.
烧结矿分级入炉和高炉返矿筛分，是鞍钢二烧在国内首次采用的两项新技术。
The techniques of sinter charging to BF by size grading, and BF return fines screening were the first time employed in our country by ANGANG.
烧结矿分级入炉和高炉返矿筛分，是鞍钢二烧在国内首次采用的两项新技术。
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