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METHOD AND APPARATUS FOR REMOVING ALKALI METAL NITRITE FROM NITRATE-CONTAINING SALT BATH
METHOD AND APPARATUS FOR REMOVING ALKALI METAL NITRITE FROM NITRATE-CONTAINING SALT BATH
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机译:从含硝酸盐的盐浴中去除碱金属亚硝酸盐的方法和装置
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摘要
Undesired nitrites are formed during the treatment of salt bath nitrided structural components of iron and steel in nitrate containing cooling baths, and they must be removed from the washing water. The build-up of nitrites can be avoided by oxidizing the nitrite in the salt bath into nitrate by passing air into the cooling bath during off-times.
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