JP6842658B2 - 製鋼用塊成物の製造方法 - Google Patents
製鋼用塊成物の製造方法 Download PDFInfo
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- JP6842658B2 JP6842658B2 JP2017010872A JP2017010872A JP6842658B2 JP 6842658 B2 JP6842658 B2 JP 6842658B2 JP 2017010872 A JP2017010872 A JP 2017010872A JP 2017010872 A JP2017010872 A JP 2017010872A JP 6842658 B2 JP6842658 B2 JP 6842658B2
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- raw material
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- steelmaking
- oil
- quicklime
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- 238000009628 steelmaking Methods 0.000 title claims description 49
- 238000004519 manufacturing process Methods 0.000 title claims description 23
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 80
- 239000002994 raw material Substances 0.000 claims description 74
- 239000011230 binding agent Substances 0.000 claims description 66
- 239000010802 sludge Substances 0.000 claims description 49
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 47
- 239000000292 calcium oxide Substances 0.000 claims description 40
- 235000012255 calcium oxide Nutrition 0.000 claims description 40
- 229920001353 Dextrin Polymers 0.000 claims description 30
- 239000004375 Dextrin Substances 0.000 claims description 30
- 235000019425 dextrin Nutrition 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 229910052742 iron Inorganic materials 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 22
- 229920002472 Starch Polymers 0.000 claims description 20
- 239000006227 byproduct Substances 0.000 claims description 20
- 239000008107 starch Substances 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 12
- 239000008188 pellet Substances 0.000 claims description 11
- 235000019698 starch Nutrition 0.000 claims description 8
- 239000000440 bentonite Substances 0.000 claims description 5
- 229910000278 bentonite Inorganic materials 0.000 claims description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 5
- 235000013379 molasses Nutrition 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 239000000047 product Substances 0.000 description 8
- 230000001965 increasing effect Effects 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 238000005469 granulation Methods 0.000 description 6
- 230000003179 granulation Effects 0.000 description 6
- 239000004484 Briquette Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229920000881 Modified starch Polymers 0.000 description 3
- 239000004368 Modified starch Substances 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 235000011116 calcium hydroxide Nutrition 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 235000019426 modified starch Nutrition 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 229940099112 cornstarch Drugs 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Description
Claims (5)
- 製鉄プロセスで発生する鉄含有副産物を原料の少なくとも一部として用い、この原料とバインダーとを混合し、ペレットまたはブリケットに加工して、製鋼工程で利用可能な製鋼用塊成物を製造する製鋼用塊成物の製造方法において、
前記原料のpHを調整し、
前記原料のpHに応じて、前記原料のpHが10.5未満の場合には、前記バインダーとしてα澱粉およびデキストリンのうちの少なくともいずれかを用い、前記原料のpHが10.5以上の場合には、前記バインダーとしてデキストリンを用いるように前記バインダーを選択する
ことを特徴とする製鋼用塊成物の製造方法。 - バインダーとして、ベントナイト、糖蜜およびパルプ廃液のうちの少なくとも1種をさらに添加する
ことを特徴とする請求項1記載の製鋼用塊成物の製造方法。 - 原料の一部として油分含有スラッジと生石灰との混合物を用いることでpHを調整する
ことを特徴とする請求項1または2記載の製鋼用塊成物の製造方法。 - 油分含有スラッジと生石灰との混合物は、生石灰の混合量が油分含有スラッジの含水量の30質量%以上120質量%以下である
ことを特徴とする請求項3記載の製鋼用塊成物の製造方法。 - 油分含有スラッジと生石灰との混合物の配合量は、全原料に対して60質量%以下である
ことを特徴とする請求項3または4記載の製鋼用塊成物の製造方法。
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JP2017010872A JP6842658B2 (ja) | 2017-01-25 | 2017-01-25 | 製鋼用塊成物の製造方法 |
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JP6842658B2 true JP6842658B2 (ja) | 2021-03-17 |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7205274B2 (ja) * | 2019-02-13 | 2023-01-17 | 日本製鉄株式会社 | 塊成物の製造方法および塊成物 |
KR20220134012A (ko) * | 2020-05-18 | 2022-10-05 | 닛폰세이테츠 가부시키가이샤 | 괴성물의 제조 방법 및 괴성물 |
CN114182091A (zh) * | 2021-12-10 | 2022-03-15 | 吉林恒联精密铸造科技有限公司 | 一种炼钢含铁固体废物冷压成型的方法 |
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