セメントレスコールドペレットの開発

概要

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At NSC Kimitsu Works, we have recently developed cementless cold-bonded pellets process using ground-granulated blast-furnace slag containing gypsum as a binder instead of cement. Ground-granulated BF slag hardens only when an alkali activator and water were added because of latent hydraulicity. We confirmed the effect of an alkali activator, water and atomospheric temperature (curing temperature) on the hardening speed by pilot test. As a result of the tests, we developed cementless cold-bonded pelletizing process which shows same hardening speed as with cement. And the properties of cementless cold-bonded pellets are almost same and superior to those of cement cold-bonded pellets. So we have made a commercial plant that produced 40000t/month, and now we use 3% cold-bonded pellets for blast-furnace burden with good operating results.
社団法人日本鉄鋼協会の論文
1991-06-01