書誌事項
- タイトル別名
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- Influence of Channeling Factor on Liquid Hold-ups in an Initially Unsoaked Bed
- 初期乾燥充填層における液ホールドアップに及ぼすチャネリングファクターの影響--初期乾燥充填層における液ホールドアップの推算式
- ショキ カンソウ ジュウテンソウ ニ オケル エキ ホールドアップ ニ オヨボス チャネリング ファクター ノ エイキョウ ショキ カンソウ ジュウテンソウ ニ オケル エキ ホールドアップ ノ スイサンシキ
- 初期乾燥充填層における液ホールドアップの推算式
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説明
One of the important factors for minimum energy consumption and CO2 emission of a blast furnace (BF) is to elucidate the liquid flow phenomena and liquid hold-ups in the dripping zone of BF. Liquid hold-ups were studied by using a cold model of a fixed bed soaked prior to experiments (hereinafter called initially soaked bed), but the existing correlation equations derived from liquid hold-ups under initially soaked bed do not agree with liquid hold-ups under initially unsoaked bed such as the dripping zone of BF.<BR>In the present study, correlation equations for liquid hold-ups in initially unsoaked bed were experimentally derived by a new approach, in which channeling factor (FC) was proposed and defined as follows: FC is the ratio of the number of liquid paths per one horizontal line to the number of voids between particles per the same horizontal line, and was measured by using the moving image of liquid paths photographed by a CCD video camera.<BR>By using empirical equation for FC, hold-ups in initially unsoaked bed were described as the following correlation equations.<BR>Static hold-up HS(I-UB) (%)= 0.9 ·HS(I SB) ·FC0.8·Ncm-1<BR>Dynamic hold-up Hd(I UB)(%)= 0.9 ·Hd(I SB) ·F0.5C<BR>Total hold-up is the sum of Hs and Hd Ht (%)=Hs+Hd<BR>where, Ncm=1+(cosθ)3, and subscripts I-SB and I-UB designate quantities associated with initially soaked and unsoaked beds, respectively.<BR>The comparison with the previous liquid hold-ups shows that the estimated hold-ups are in good agreement with the experimental values for any particle diameters used and both contact angles of 10° and 70° under initially unsoaked bed.
収録刊行物
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- 鉄と鋼
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鉄と鋼 92 (12), 893-900, 2006
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
- 1390001205183193600
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- NII論文ID
- 110004862667
- 130000251294
- 30019995738
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- NII書誌ID
- AN00151251
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- COI
- 1:CAS:528:DC%2BD2MXht1WqsLjL
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- ISSN
- 18832954
- 13475460
- 00211575
- 09151559
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- NDL書誌ID
- 8599480
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