書誌事項
- タイトル別名
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- Fabrication of Equipments Treating Iron and Steel Slags with Highly-Pressurized Hot Water and Investigation of Leaching of Constituents from the Slags
- コウオン コウアツスイ オ モチイル スイネツ ショリ ソウチ ノ サクセイ ト テッコウ スラグ カラ ノ セイブン ゲンソ ノ ヨウシュツ
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Two types of apparatus to treat steel slags with highly pressurized hot water were fabricated and examined in terms of leaching of constituents from the slags. The batch-type apparatus was consisted with a stainless steel vessel and a sand bath; a flow-type apparatus was composed of a stainless steel column, a column oven, an HPLC pump, a backpressure valve, and a fraction collector. In the batch-treating system, the concentrations of the elements leached from slags tended to increase as increase in the treating temperature while pH of the solution shows no obvious relations to the solution temperature. In the case of flow-treating system, on the other hand, a unique dependency of pH of the leachate on the treating temperature was observed in the obtained flow profiles. The flow profiles of the pH highly related to those of the concentration of calcium ion and sulfate. Treating 5.1 g of blast-furnace slag with 350 mL of water by the flow system at 250 ºC enabled to leach 22.5% of phosphorus, 97.1% of sulfur, and 0.89% of calcium from the slag. New depositions without sulfur on the treated slags were observed in SEM images, indicating that not only dissolution but also deposition occurred simultaneously during the treatment with highly pressurized hot water in the column. Thus, using highly pressurized hot water is promising method to treat steel slags for reuse of steel slags as environmental-friendly materials.
収録刊行物
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- 鉄と鋼
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鉄と鋼 100 (8), 1014-1020, 2014
一般社団法人 日本鉄鋼協会
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詳細情報 詳細情報について
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- CRID
- 1390001205126602496
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- NII論文ID
- 130004679368
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- NII書誌ID
- AN10528571
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- ISSN
- 1341688X
- 18832954
- 00211575
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- NDL書誌ID
- 025739283
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可