JP2005097076A - 製鋼スラグの安定化処理方法および安定化製鋼スラグ - Google Patents
製鋼スラグの安定化処理方法および安定化製鋼スラグ Download PDFInfo
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- 239000002893 slag Substances 0.000 title claims abstract description 196
- 238000009628 steelmaking Methods 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000006641 stabilisation Effects 0.000 title claims abstract description 25
- 238000011105 stabilization Methods 0.000 title claims abstract description 25
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 112
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 99
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 56
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 56
- 239000002245 particle Substances 0.000 claims description 50
- 239000000463 material Substances 0.000 claims description 27
- 239000000843 powder Substances 0.000 claims description 14
- 230000032683 aging Effects 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 238000003672 processing method Methods 0.000 claims description 2
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- 238000006243 chemical reaction Methods 0.000 description 20
- 230000008569 process Effects 0.000 description 17
- 239000011575 calcium Substances 0.000 description 16
- 230000001276 controlling effect Effects 0.000 description 10
- 238000009826 distribution Methods 0.000 description 9
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- 238000010998 test method Methods 0.000 description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 239000004568 cement Substances 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 6
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- 235000011941 Tilia x europaea Nutrition 0.000 description 4
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000004677 hydrates Chemical class 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
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Abstract
【解決手段】 大気雰囲気下、加圧雰囲気下または水蒸気雰囲気下でエージング処理が施された製鋼スラグに、自由水が存在し始める水分値未満で、かつ、該水分値よりも10質量%少ない値以上の範囲となるように添加する水分量を調整した後に、炭酸ガスを含有する相対湿度が75〜100%のガスを流すことを特徴とする製鋼スラグの安定化処理方法。
【選択図】 図2
Description
=増加質量/{元のスラグ質量×(%f−CaO)×0.786}×100
図1は、添加する水分を0〜30質量%に変化させた場合の質量変化からみた炭酸化率の経時変化を示したものであるが、この図から、水を添加しないと、ほとんど変化は生じず、水を添加すると、従来から報告されているように、炭酸化が円滑に始まり、添加水量の増加に伴い炭酸化の速度も増加していくものの、さらに、添加水量を増加しても、途中から炭酸化の速度が減少することが確認された。
Claims (7)
- 大気雰囲気下、加圧雰囲気下または水蒸気雰囲気下でエージング処理が施された製鋼スラグに、自由水が存在し始める水分値未満で、かつ、該水分値よりも10質量%少ない値以上の範囲となるように添加する水分量を調整した後に、炭酸ガスを含有し相対湿度が75〜100%のガスを流すことを特徴とする製鋼スラグの安定化処理方法。
- 水分量を調整後、炭酸ガスを含有するガスを流す際の製鋼スラグを含む周辺の雰囲気温度が、常温以上、80℃以下となるように前記ガスの流量を制御することを特徴とする請求項1に記載の製鋼スラグの安定化処理方法。
- 製鋼スラグに添加する水分量、炭酸ガスを含有するガスの流量、前記ガスの相対湿度の1種または2種以上を制御することにより、製鋼スラグの粒同士を固結させることなく炭酸化処理することを特徴とする請求項1または2に記載の製鋼スラグの安定化処理方法。
- 処理後の製鋼スラグ中の、遊離CaOおよびCa(OH)2を合計で0.9質量%以下とすることを特徴とする請求項1〜3の何れか1項に記載の製鋼スラグの安定化処理方法。
- 粒径25mm以下、遊離CaOおよびCa(OH)2が合計で0.9質量%以下である製鋼スラグ粒からなる擬似粒子体であることを特徴とする安定化製鋼スラグ。
- 粒径75μm以下の粉分が当該粒径超のスラグ粒に付着していることを特徴とする請求項5に記載の安定化製鋼スラグ。
- 路盤材用材料であることを特徴とする請求項5または6に記載の安定化製鋼スラグ。
Priority Applications (4)
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JP2004069215A JP3828897B2 (ja) | 2003-06-09 | 2004-03-11 | 製鋼スラグの安定化処理方法および安定化製鋼スラグ |
PCT/JP2004/008385 WO2004108624A1 (ja) | 2003-06-09 | 2004-06-09 | 製鋼スラグの安定化処理方法と安定化製鋼スラグおよび該スラグを用いる水域環境保全材料と水域環境保全方法 |
KR20057015856A KR100732732B1 (ko) | 2003-06-09 | 2004-06-09 | 제강 슬러그의 안정화 처리 방법과 안정화 제강 슬러그 및그 슬러그를 이용하는 수역 환경 보전 재료와 수역 환경보전 방법 |
EP04745937.5A EP1630143B1 (en) | 2003-06-09 | 2004-06-09 | Method of treatment of steelmaking-slag for stabilization, stabilized steelmaking-slag, use therof as environment protection material and water environment protection method using said slag |
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JP2004069215A JP3828897B2 (ja) | 2003-06-09 | 2004-03-11 | 製鋼スラグの安定化処理方法および安定化製鋼スラグ |
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KR100639116B1 (ko) | 2005-10-12 | 2006-10-31 | 주식회사 포스코 | 분화슬래그의 개질 방법 |
JP2007031220A (ja) * | 2005-07-28 | 2007-02-08 | Nippon Steel Corp | スラグの造粒方法および造粒スラグ |
JP2007106631A (ja) * | 2005-10-13 | 2007-04-26 | Sumitomo Metal Ind Ltd | 製鋼スラグのエージング方法 |
JP2007126838A (ja) * | 2005-11-01 | 2007-05-24 | Nippon Steel Corp | 覆砂工法 |
JP2007314854A (ja) * | 2006-05-29 | 2007-12-06 | Nippon Steel Corp | 高温スラグの処理方法 |
JP2008013784A (ja) * | 2006-07-03 | 2008-01-24 | Nippon Steel Corp | 高温スラグ処理装置 |
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