コールドペレットの連続急速養生プロセスの開発および成品の性状評価

概要

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For the purpose of developing a process in which the cold pellet can be produced in about 10 hours, the continuous rapid curing procedure has been investigated using iron ore pellet with 10%-portland cement and dust pellet with 14%-B.F. granulated slag as binder. 1) A continuous curing with about 10 hours is possible by the combination of pre-drying, steaming below 100℃ and drying. 2) The strength of pellet using portland cement is improved in drying with atmosphere. 3) In the operation of pilot plant with 6.5 ton/day, the compressive strength of produced ore pellet and dust pellet are 170-200 kg p and 140-170 kg/p respectively, and their physical properties are comparable to that of fired pellet. 4) The required energy of this process is about 80000 kcal t product, and this process is a polution-free and energy saving process in which the waste gas from the plant can be used. 5) The hydrates of cement are decomposed in 800-900℃, however, the shape and strength of pellet are remained by sintering between ore and cement particles. Above 1000℃ the coherence of pellet is reinforced. This phenomena agree with the behavior of swelling and strength of pellet during reduction.
社団法人日本鉄鋼協会の論文
1983-12-01