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总结了马钢三烧烧结大烟道放灰用气动双层阀半年多的改造性试验，为改造我国部分烧结厂或其他厂使用的双层放灰阀提供了参考。
Summarizes the reforming test of the pneumatic double-layer valve with double burners for the discharge of the big smokestack of Maanshan Iron and Steel Co., Ltd., which provides a reference for revamping the double-layer ash discharge valve used in some sintering plants in China.