CN100348746C - Adhesive for iron-ore pelletizing and preparing method - Google Patents
Adhesive for iron-ore pelletizing and preparing method Download PDFInfo
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- CN100348746C CN100348746C CNB2006100182984A CN200610018298A CN100348746C CN 100348746 C CN100348746 C CN 100348746C CN B2006100182984 A CNB2006100182984 A CN B2006100182984A CN 200610018298 A CN200610018298 A CN 200610018298A CN 100348746 C CN100348746 C CN 100348746C
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- iron ore
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- ore pellets
- polyacrylamide
- iron
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- 238000000034 method Methods 0.000 title claims description 8
- 238000005453 pelletization Methods 0.000 title description 14
- 230000001070 adhesive effect Effects 0.000 title description 10
- 239000000853 adhesive Substances 0.000 title description 7
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000008188 pellet Substances 0.000 claims abstract description 36
- 239000011230 binding agent Substances 0.000 claims abstract description 32
- 229910052742 iron Inorganic materials 0.000 claims abstract description 24
- 239000002245 particle Substances 0.000 claims abstract description 9
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 4
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 4
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 4
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 4
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims abstract description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 4
- 239000004743 Polypropylene Substances 0.000 claims abstract description 3
- 229920002472 Starch Polymers 0.000 claims abstract description 3
- -1 polypropylene Polymers 0.000 claims abstract description 3
- 229920001155 polypropylene Polymers 0.000 claims abstract description 3
- 235000019698 starch Nutrition 0.000 claims abstract description 3
- 239000008107 starch Substances 0.000 claims abstract description 3
- 229910052708 sodium Inorganic materials 0.000 claims abstract 4
- 239000011734 sodium Substances 0.000 claims abstract 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000000654 additive Substances 0.000 abstract description 3
- 230000000996 additive effect Effects 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 230000009172 bursting Effects 0.000 abstract 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 10
- 230000009467 reduction Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 239000000440 bentonite Substances 0.000 description 3
- 229910000278 bentonite Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004021 humic acid Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229940079832 sodium starch glycolate Drugs 0.000 description 2
- 239000008109 sodium starch glycolate Substances 0.000 description 2
- 229920003109 sodium starch glycolate Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 235000008504 concentrate Nutrition 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000012256 powdered iron Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000003265 pulping liquor Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229940032147 starch Drugs 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明涉及一种用于铁矿球团的粘结剂及其制备方法。采用的技术方案是：按重量百分含量将羧甲基淀粉钠20～40%、聚丙烯酰胺5～10%、聚丙烯0～5%、腐植酸钠0～5%、耐水腻子粉20～40%、高岭土3～5%、硫酸亚铁5～10%和碳酸钠5～10%进行细磨混合。细磨为≤0.074mm粒度的含量≥80%。聚丙烯酰胺的分子量为300万以上。本发明具有粘结性能好、热性能强、添加量下降、不增加成本、不含杂质的特点。用本发明制备的铁矿球团明显提高了生球强度与爆裂温度，可提高球团矿铁品位，能改善球团矿质量。The invention relates to a binder for iron ore pellets and a preparation method thereof. The technical solution adopted is: 20-40% of sodium carboxymethyl starch, 5-10% of polyacrylamide, 0-5% of polypropylene, 0-5% of sodium humate, and 20-40% of water-resistant putty powder according to the weight percentage. 40%, kaolin 3-5%, ferrous sulfate 5-10% and sodium carbonate 5-10% for fine grinding and mixing. The content of fine grinding is ≤0.074mm particle size ≥80%. The molecular weight of polyacrylamide is more than 3 million. The invention has the characteristics of good bonding performance, strong thermal performance, reduced additive amount, no increase in cost and no impurities. The iron ore pellets prepared by the invention obviously increase the green pellet strength and bursting temperature, can increase the iron grade of the pellets, and can improve the quality of the pellets.
Description
One, technical field
The invention belongs to the adhesive techniques field.Relate in particular to a kind of binding agent that is used for iron ore pellets and preparation method thereof.
Two, background technology
In iron ore pellets technology, in order to improve the balling-up of material, improve wet, dry bulb group's intensity and improve the material thermostability, improve quality product, cut down the consumption of energy, a valid approach is exactly to adopt suitable binding agent.It neither increases facility investment, does not change original production technique again, and can obtain effect of increasing production.So the agglomeration worker pays much attention to the development and the application of binding agent both at home and abroad.
Current, the binding agent that is used for iron ore pellets in the production mainly all is a wilkinite.Bentonite adhesive can play regulates pellet feed moisture content, stablizes the pelletizing operation, improves effects such as pellet strength.But its main component is SiO
2Can make the dilution of pellet ferrous grade, and can between iron oxide particle, form cross structure during roasting, stop up the passage that enters internal void, cause pellet ore reduction decline, increase the energy consumption when smelting.In addition, there is not chemical action between bentonite clay particle and magnetite ore particles, pelletizing can only rely on Van der Waals force and internal friction power to obtain intensity, this green ball strength is very low, the most of wilkinites of China are second-rate in addition, the iron ore granularity is thicker, often take to strengthen bentonite consumption for improving green ball strength, thus make above-mentioned shortcoming seem particularly evident (Xu Manxing. the quality progress of opinion new millennium pellet. pelletizing technology, 1990 the 1st phases: 1-3).
In current production or the research, the binding agent that is used for the powdered iron ore moulding has wilkinite, lime, cement, water glass, borate, clay, coal tar, petroleum slag, flyash, spent pulping liquor, syrup, marine plant (sodium alginate), humic acids, various starch, water glass, Peridur and polyacrylamide etc., a multitude of names.Generally binding agent is divided into mineral binder bond, natural organic binder bond, synthetic organic binder bond and compound binding agent etc. by its source.In general, mineral binder bond has characteristics such as Heat stability is good, dry bulb group intensity is better, but all exist inevitably green ball strength relatively poor, brought impurity into, reduced unfavorable factors such as concentrate grade (Huang Tianzheng. the present Research of pelletizing additive and development. agglomerates of sintered pellets, 1997,22 (3): 1-7).
Organic binder bond is applied to the pelletizing field, and external development is very rapid.60 to the beginning of the eighties, the synthetic organic binder bond Alcotal of Britain colloid company limited development has just replaced wilkinite to be applied to that (Eur.Pat.Ep 36 on the pelletizing process, 713 (1990)), the industrial binding agent of nineteen eighty-two Holland's anka (Enka) company has released Peridur and has been used for pellet formation (horse in R.H. is uncommon, H. Gottfried Kottmann etc. use organic binder bond to improve the quality of acid, peridotites and rhombspar flux iron ore pellets. the 5th international agglomeration meeting paper choosing, metallurgical industry press, 1991, (5): 191-207).Drop into and use based on the binding agent (commodity are called Peridur) of carboxymethyl cellulose with based on the many in the world factories of the binding agent (commodity are called Alcotal) of vinylformic acid, acrylamide or their multipolymer.Peridur be up to now the organic binder bond of industrial successful Application (do not treat Luso husband etc. when producing iron ore pellets, adopt the effect of wilkinite surrogate. external iron and steel, 1996, (4): 1-3), contain a large amount of carboxylic acid groups and hydroxyl in its molecule, it is a kind of water-soluble good long-chain macromolecular compound, can make the reduction of magnetite ore particles surface contact angle, wetting ability strengthen, thereby the balling-up of ore particle is improved.In the drying and consolidating stage of pelletizing, raise with temperature, pelletizing moisture constantly evaporates, bridge liquid concentration constantly increases between particle, and pelletizing produces and shrinks, and bridge liquid becomes gel by solution, become firm adhesive film at last and between particle, form the solid bridged bond, guarantee the intensity of dry bulb.But if consolidation temperature surpasses the decomposition temperature of Peridur molecule, then binding agent may decompose, and pellet strength descends on the contrary.In addition, existing organic binder bond also ubiquity thermal characteristics problem poor, on the high side.
Three, summary of the invention
Task of the present invention provides that a kind of adhesive property is good, thermal characteristics is strong, addition descends, do not increase cost, binding agent that is used for iron ore pellets and production method thereof free from foreign meter.Iron ore pellets with this adhesive preparation can obviously improve green ball strength and burst temperature, and can improve pellet iron grade, can improve pellet quality.
For finishing above-mentioned task, the technical solution used in the present invention is: percentage composition carries out the fine grinding mixing with sodium starch glycolate 20～40%, polyacrylamide 5～10%, polypropylene 0～5%, Sodium salts humic acids 0～5%, water-proof putty powder 20～40%, kaolin 3～5%, ferrous sulfate 5～10% and yellow soda ash 5～10% by weight.Fine grinding is≤content 〉=80% of 0.074mm granularity.The molecular weight of polyacrylamide is more than 3,000,000.
Owing to adopt technique scheme, the present invention has that adhesive property is good, thermal characteristics strong, addition descends, do not increase cost, characteristics free from foreign meter.Prepare iron ore pellets with the present invention and obviously improved green ball strength and burst temperature, also improved pellet iron grade, improved pellet quality.
Four, embodiment
A kind of adhesive preparation method that is used for iron ore pellets: percentage composition carries out fine grinding with sodium starch glycolate 25～35%, polyacrylamide 5～8%, Sodium salts humic acids 1～5%, water-proof putty powder 30～40%, kaolin 3～5%, ferrous sulfate 8～10% and yellow soda ash 5～10% and mixes by weight, and fine grinding is≤content 〉=80% of 0.074mm granularity.The molecular weight of polyacrylamide is more than 3,000,000.
The present embodiment adhesive property is good, thermal characteristics strong, addition descends, do not increase cost, free from foreign meter.
With this adhesive preparation iron ore pellets, used iron ore raw material is: TFe is that 64.0～66.0wt%, FeO are that 26.0～28.0wt%, CaO are that 1.0～2.0wt%, MgO are 1.5～2.5wt%, SiO
2Be 3.5～5.5wt%, outer adding additives 0.3～0.5wt%, and under equal conditions with add other binding agents and contrast comprehensively.Its pelletizing green-ball performance comparison is as shown in table 1, the contrast of pellet over-all properties is as shown in table 2.
Table 1 green-ball performance comparison
| The binding agent kind | Binding agent consumption/% | Wet bulb intensity | Burst temperature ℃ | Dry bulb intensity | ||
| Dropping strength/time/0.5m | Ultimate compression strength/N/ | Dropping strength/time/0.5m | Ultimate compression strength/N/ | |||
| Wilkinite | 2.0～2.5 | 3.5-4.5 | 12-18 | 460-480 | 2.0-3.0 | 30-40 |
| Xylo-Mucine the present invention | 0.2～0.3 0.3～0.5 | 15-20 5.5-12.5 | 8-12 15-20 | 440-460 620-640 | ＞10 5.0-7.0 | 200-220 50-80 |
The contrast of table 2 pellet over-all properties
| Binding agent kind consumption/% | Ultimate compression strength/N/ | TFe /％ | Reduction degree RI/% | Metallurgical performance | ||||
| Low temperature reduction degradation index RDI -3.15 | Reduction swellability index RSI | Softening beginning temperature/℃ | Softening finishing temperature/℃ | Drip the beginning temperature/℃ | ||||
| Wilkinite 2.5 | 2671 | 62.24 | 66.15 | 28.61 | 18.51 | 1015 | 1231 | 1379 |
| Xylo-Mucine 0.3 the present invention 0.5 | 1914 2979 | 64.35 64.19 | 74.13 75.45 | 22.32 1.52 | 13.24 10.82 | 1031 1036 | 1206 1215 | 1325 1408 |
As can be seen from the above table, adopt present embodiment to make the adhesive preparation iron ore pellets with adopting wilkinite, green ball strength has improved that 2.0～5.0 times/0.5m, burst temperature improve that about 100～150 ℃, pelletizing TFe content are high approximately by 1.5～2.0%, pelletizing ultimate compression strength improves that 20～500N/, pelletizing metallurgical performance, reduction degree rising 5～10%, reduction degradation index decreased are about 15.0%, the reduction swellability rate reduce about 8.0%, the pellet formation cost is constant substantially.
Claims (4)
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| CNB2006100182984A CN100348746C (en) | 2006-01-25 | 2006-01-25 | Adhesive for iron-ore pelletizing and preparing method |
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| CNB2006100182984A CN100348746C (en) | 2006-01-25 | 2006-01-25 | Adhesive for iron-ore pelletizing and preparing method |
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| CN1814825A CN1814825A (en) | 2006-08-09 |
| CN100348746C true CN100348746C (en) | 2007-11-14 |
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| CNB2006100182984A Expired - Fee Related CN100348746C (en) | 2006-01-25 | 2006-01-25 | Adhesive for iron-ore pelletizing and preparing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11932917B2 (en) | 2017-04-18 | 2024-03-19 | Binding Solutions Ltd | Iron ore pellets |
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| CN105907954A (en) * | 2016-06-06 | 2016-08-31 | 江苏省冶金设计院有限公司 | Composite bonding agent and application of composite bonding agent in mineral powder forming |
| CN106755985A (en) * | 2016-12-20 | 2017-05-31 | 江苏省冶金设计院有限公司 | The composite dry powder binding agent and iron powder forming method of iron powder shaping |
| CN107267751B (en) * | 2017-06-15 | 2018-06-15 | 华北理工大学 | A kind of method for improving magnesian flux bursting temperature of pellet ores |
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| CN110004290A (en) * | 2019-04-25 | 2019-07-12 | 王勇 | A kind of metallurgical briquetting binder and preparation method thereof |
| BR102019023195B1 (en) * | 2019-11-05 | 2021-01-19 | Vale S.A. | production process of iron ore fines agglomerate and agglomerated product |
| CN111004914B (en) * | 2019-11-13 | 2022-02-18 | 鞍钢集团矿业有限公司 | Reinforcing method for ammonia spraying denitration in iron ore pellet production process |
| CN113403473B (en) * | 2021-06-21 | 2024-08-09 | 扬州泰富特种材料有限公司 | Method for strengthening sphericity of superfine magnetite concentrate |
| CN114752757A (en) * | 2022-05-30 | 2022-07-15 | 秦皇岛宏兴钢铁有限公司 | Mixed binder for preparing carbon-containing cold-pressed pellets, preparation method and application thereof |
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| RU2241770C1 (en) * | 2003-10-09 | 2004-12-10 | Мельник Виктор Герасимович | Batch for manufacturing of iron-ore pellets |
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2006
- 2006-01-25 CN CNB2006100182984A patent/CN100348746C/en not_active Expired - Fee Related
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|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11932917B2 (en) | 2017-04-18 | 2024-03-19 | Binding Solutions Ltd | Iron ore pellets |
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| CN1814825A (en) | 2006-08-09 |
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