CN1203954A - Production method of direct reduction shaft and blast furnace cold-bonded pellet - Google Patents
Production method of direct reduction shaft and blast furnace cold-bonded pellet Download PDFInfo
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- CN1203954A CN1203954A CN 98101742 CN98101742A CN1203954A CN 1203954 A CN1203954 A CN 1203954A CN 98101742 CN98101742 CN 98101742 CN 98101742 A CN98101742 A CN 98101742A CN 1203954 A CN1203954 A CN 1203954A
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Abstract
The production method of cold-bonded pellet for direct reduction shaft furnace and blast furnace is characterized by adopting an improved composite binder whose formula is composed of (wt%) 3.0-8.0% of water glass and 0.4-1.0% of silicasol and/or 1.0-3.0% of bentonite, adding one into the iron ore powder whose grain size is less than 8 mm or iron mud, uniformly mixing, briquetting by using 20-30 MPa pressure and drying the obtained green pellet for 30-60 min. at 100-300 deg.C so as to obtain the required cold-bonded pellet with good mechanical strength and high temp. metallurgical property.
Description
The present invention relates to a kind of production method of producing sponge iron or molten iron usefulness cold bound pellet.
Shaft furnace process produces sponge iron and blast furnace process production molten iron technology all requires to use the massive iron ore raw material, as natural lump ore, pellet and agglomerate, and the rich lump ore that can directly use for direct reduction shaft furnace and blast furnace technology in the iron ore resource worldwide and few, adopt the high temperature agglomeration method of sintering or roasting pelletizing to exist complex process equipment, initial cost is big, the capital construction cycle is long, problems such as energy consumption is high and seriously polluted, therefore it is simple to have a processing unit without the cold bound pellet method of high-temperature roasting, energy consumption is low, less investment, advantages such as short and environmental protection condition of construction period is good, so the cold bound pellet method comes into one's own day by day as a kind of agglomeration technology of powdered iron ore.The performance of unfired pellets depend primarily on adopt, at present since adopt not ideal enough, cold bound pellet is poorer than natural lump ore, acid pellet or agglomerate on high temperature metallurgical performances such as physical strength, particularly hot strength.For example Chinese patent CN1120074A discloses a kind of " producing the directly method of reduction furnace charge with cold fixed briquetting method ", be to adopt the humate organic binder bond to produce cold bound pellet, the wretched insufficiency that has physical strength not high (ultimate compression strength is lower than 1500N/, and barrate strength is lower than 50%).And the cold bound pellet that generally adopts sodium silicate binder to produce in the prior art, a kind of " the cold fixed agglomeration process of the shape powder that looses " disclosed as Chinese patent application CN1056532A, though this pelletizing has very high physical strength, but because water glass decomposes under the high temperature about 700 ℃, cause the high-temperature behavior of cold bound pellet very poor, thereby be difficult to be suitable for direct reduction shaft furnace and blast furnace production.
The objective of the invention is to obtain a kind of production method that can be used in the cold bound pellet of direct reduction shaft furnace and blast furnace, improve its heat resistance, make cold bound pellet have higher physical strength and high temperature metallurgical properties.
For achieving the above object, the technical scheme of the present invention's proposition is such:
A kind of method of producing direct reduction shaft furnace and blast furnace cold-bonded pellet, be with powdered iron ore or the ion dust mud contaning adding binding agent of granularity less than 8mm, mix the back with 20～30MPa pressure compound stalk forming, the green briquette of compacting can arrive required cold bound pellet in dry 30～60 minutes down at 100～300 ℃, the composition of described binding agent (weight, as follows) is: the wilkinite of 3.0～8.0% water glass and 0.4～1.0% silicon sol and/or 1.0～3.0%.
Contain coal dust or the coke powder of 0～20% granularity in the raw material less than 3mm.
The proportional range of binding agent is: the ratio of silicon sol and water glass is 1: 20～1: 3.
The proportional range of binding agent is: the ratio of wilkinite and water glass is 1: 8～1: 1.
The content of binding agent is less than 9% of the raw material total amount.
Below the present invention is done and be described in further detail.
Key of the present invention is the binding agent of cold bound pellet is improved, it is the compoiste adhering agent prescription that adopts water glass and silicon sol or wilkinite to form, its method is: be with the compound binding agent of granularity less than powdered iron ore or the ion dust mud contaning adding following ingredients of 8mm: 3.0～8.0% (weight, as follows) water glass (modulus is 2.0～3.0) and 0.4～1.0% silicon sol (liquid), and/or the wilkinite of 3.0～8.0% water glass and 1.0～3.0% (fine powder).If content is low excessively, silicon sol less than 0.4% or wilkinite less than 1.0%, then do not have effect; Too high levels, silicon sol greater than 1.0 or wilkinite greater than 3.0%, cost is too high, simultaneously Si, Mg, impurity components such as K, Na enter too much, influence the pelletizing composition, and are influential to its metallurgical performance.After will placing the mixing machine thorough mixing evenly by the raw material of mentioned component batching, through the nodulizer compound stalk forming, the green briquette of compacting can arrive required cold bound pellet in dry 30～60 minutes down at 100～300 ℃ with 20～30MPa pressure.
Also can contain 0～20% granularity in the above-mentioned raw materials is the following coal dust of 3mm, and becomes carbon containing cold consolidated pelletizing, and the overall control of compound binding agent brings too much impurity component to avoid binding agent to cold bound pellet below 9%.Adding binding agent will carry out powerful mixing and roll compound, and the time is 5～15 minutes, and guaranteeing that binding agent is evenly distributed in compound, the moisture of compound should be greater than 5.5% when entering ball press, so raw material is moisture should not surpass 3%.
The ratio of compound binding agent is among the present invention, and the ratio of silicon sol and water glass is 1: 20～1: 3, and perhaps the ratio of wilkinite and water glass is 1: 8～1: 1.The mechanism of action of this compound binding agent is: when water glass issues estranged separating at the high temperature more than 700 ℃, and when losing cohesive action, silicon sol and/or wilkinite performance cohesive action, thus kept the hot strength of cold bound pellet.If only adopt silicon sol and/or wilkinite to make binding agent, then the normal temperature strength of cold bound pellet does not reach requirement.This compound binding agent high normal temperature strength (mechanical property) when both having kept independent employing water glass to make binding agent has improved the hot strength of cold bound pellet by adding silicon sol and/or wilkinite again.
Introduce effect of the present invention below in conjunction with embodiment.
Referring to table 1, the compound binding agent of different proportionings is added in the powdered iron ore of granularity less than 8mm, after placing the mixing machine thorough mixing evenly, with 20～30MPa pressure through the nodulizer compound stalk forming, the green briquette of compacting can obtain the finished product cold bound pellet in dry 30～60 minutes down at 100～300 ℃, the physical strength and the high temperature metallurgical properties of the cold bound pellet that obtains are listed in table 1, can satisfy the requirement of direct reduction shaft furnace and blast furnace substantially.
Compared with prior art, the method of direct reduction shaft furnace of the production that the present invention obtains and blast furnace cold-bonded pellet, the improved compoiste adhering agent prescription that adopts, the wretched insufficiency that has existed when having overcome independent use water glass, improved the hot strength of cold bound pellet greatly, the cold bound pellet that obtains has physical strength and high temperature metallurgical properties preferably, can satisfy the requirement of direct reduction shaft furnace and blast furnace production technique.Table 1
| Binding agent % | Barrate strength % | Softening beginning temperature ℃ | Fusing beginning temperature ℃ | Reductibility % | ||
| Water glass | Silicon sol | Wilkinite | ||||
| ????3.5 | ?????- | ????- | ????78.7 | ????915 | ????950 | ????91.8 |
| ????3.5 | ?????- | ???1.5 | ????72.6 | ????940 | ????1075 | ????93.9 |
| ????3.5 | ????0.5 | ????- | ????82.6 | ????1040 | ????1050 | ????95.0 |
| ????3.5 | ????1.0 | ????- | ????83.7 | ????940 | ????1075 | ????94?5 |
| ????3.5 | ????0.5 | ???1.5 | ????68.5 | ????965 | ????1165 | ????91.9 |
| ????4.0 | ????0.6 | ???2.0 | ????81.5 | ????985 | ????1175 | ????94.2 |
Claims (5)
1. method of producing direct reduction shaft furnace and blast furnace cold-bonded pellet, be with powdered iron ore or the ion dust mud contaning adding binding agent of granularity less than 8mm, mix the back with 20～30MPa pressure compound stalk forming, the green briquette of compacting can arrive required cold bound pellet in dry 30～60 minutes down at 100～300 ℃, it is characterized in that: the composition of described binding agent (weight, as follows) is: the wilkinite of 3.0～8.0% water glass and 0.4～1.0% silicon sol and/or 1.0～3.0%.
2. method according to claim 1 is characterized in that: contain coal dust or the coke powder of 0～20% granularity less than 3mm in the described raw material.
3. method according to claim 1 is characterized in that: the proportional range of described binding agent is: the ratio of silicon sol and water glass is 1: 20～1: 3.
4. method according to claim 1 is characterized in that: the proportional range of described binding agent is: the ratio of wilkinite and water glass is 1: 8～1: 1.
5. method according to claim 1 is characterized in that: the content of described binding agent is less than 9% of the raw material total amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101742A CN1055320C (en) | 1998-04-29 | 1998-04-29 | Production method of direct reduction shaft and blast furnace cold-bonded pellet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101742A CN1055320C (en) | 1998-04-29 | 1998-04-29 | Production method of direct reduction shaft and blast furnace cold-bonded pellet |
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| Publication Number | Publication Date |
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| CN1203954A true CN1203954A (en) | 1999-01-06 |
| CN1055320C CN1055320C (en) | 2000-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN98101742A Expired - Fee Related CN1055320C (en) | 1998-04-29 | 1998-04-29 | Production method of direct reduction shaft and blast furnace cold-bonded pellet |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100412210C (en) * | 2006-07-10 | 2008-08-20 | 西安建筑科技大学 | Manganese carbon alloy ball for steel-making recarburization |
| WO2010072999A3 (en) * | 2008-12-23 | 2010-08-12 | Oxonica Materials Limited | Sintering of metal-bearing ore in the presence of nanoparticles of metal oxide |
| CN102031361A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Method for comprehensively treating and utilizing dust sludge |
| CN102276267A (en) * | 2011-06-09 | 2011-12-14 | 山西太钢不锈钢股份有限公司 | Manufacturing method of high-strength shaft furnace carbon brick |
| CN102666886A (en) * | 2009-11-17 | 2012-09-12 | 淡水河谷公司 | Ore fine agglomerate to be used in sintering process and production process of ore fines agglomerate |
| CN103667691A (en) * | 2013-12-12 | 2014-03-26 | 攀枝花钢城集团有限公司 | High-iron-content pellet for converter steelmaking and preparation method of high-iron-content pellet |
| CN104046772A (en) * | 2013-03-15 | 2014-09-17 | 上海梅山钢铁股份有限公司 | Method for making cooled agglomerated pellets by use of converter gas dry-method electrostatic precipitator |
| CN104846193A (en) * | 2015-04-16 | 2015-08-19 | 武汉科技大学 | Method for pressing steel slag into furnace charge of blast furnace |
| CN105950863A (en) * | 2016-05-11 | 2016-09-21 | 江苏省冶金设计院有限公司 | Ferronickel powder forming method |
| CN107488784A (en) * | 2017-09-06 | 2017-12-19 | 安徽工业大学 | A kind of blast furnace ironmaking superfluxed pellets and its production method |
| CN109628735A (en) * | 2019-02-14 | 2019-04-16 | 武汉科技大学 | The method for preparing cooled agglomerated pellet using revolving furnace mud |
| CN113166844A (en) * | 2019-11-05 | 2021-07-23 | 淡水河谷公司 | Iron ore powder agglomerate production method and agglomerated product |
| CN113366128A (en) * | 2018-12-12 | 2021-09-07 | 耶稣大拇指 | A method of briquetting coal from pellet fines, DRI sludge, DRI fines and residual fines from DRI dust treatment system |
| CN113736991A (en) * | 2020-05-27 | 2021-12-03 | 上海梅山钢铁股份有限公司 | Self-fluxing cold-pressing composite furnace charge for blast furnace ironmaking and preparation method thereof |
| CN114525402A (en) * | 2022-04-22 | 2022-05-24 | 唐山金沙燃烧热能股份有限公司 | Preparation method and application of blast furnace sintering-free cold-bonded pellet |
| CN114763583A (en) * | 2021-01-15 | 2022-07-19 | 宝山钢铁股份有限公司 | Preparation method of iron ore powder cold briquetting and application of iron ore powder cold briquetting |
| CN117758044A (en) * | 2023-12-25 | 2024-03-26 | 北京辰兴环宇高新技术发展有限公司 | Adhesive for high-temperature-resistant cold bonded pellets, cold bonded pellets and preparation method of cold bonded pellets |
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| RU2024634C1 (en) * | 1989-10-30 | 1994-12-15 | Белгородский научно-исследовательский институт по обогащению и окомкованию руд черных металлов "Белмеханобрчермет" | Binder for production of pellets |
| CN1018933B (en) * | 1991-05-24 | 1992-11-04 | 宣化钢铁公司 | Cold-consolidation and agglomeration technology for loose powder material |
| RU2031154C1 (en) * | 1992-02-10 | 1995-03-20 | Белгородский научно-исследовательский институт по обогащению и окомкованию руд черных металлов "Белмеханобрчермет" | Binder for manufacture of iron ore pellets |
| RU2031554C1 (en) * | 1992-07-14 | 1995-03-20 | Научно-исследовательский институт измерительной техники | Lighting fixture |
| US5395441A (en) * | 1992-10-19 | 1995-03-07 | Usx Corporation | Revert briquettes for iron making blast furnace |
-
1998
- 1998-04-29 CN CN98101742A patent/CN1055320C/en not_active Expired - Fee Related
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| CN100412210C (en) * | 2006-07-10 | 2008-08-20 | 西安建筑科技大学 | Manganese carbon alloy ball for steel-making recarburization |
| WO2010072999A3 (en) * | 2008-12-23 | 2010-08-12 | Oxonica Materials Limited | Sintering of metal-bearing ore in the presence of nanoparticles of metal oxide |
| CN102031361A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Method for comprehensively treating and utilizing dust sludge |
| CN102031361B (en) * | 2009-09-30 | 2013-03-13 | 鞍钢股份有限公司 | Method for comprehensively treating and utilizing dust sludge |
| CN102666886A (en) * | 2009-11-17 | 2012-09-12 | 淡水河谷公司 | Ore fine agglomerate to be used in sintering process and production process of ore fines agglomerate |
| CN102276267A (en) * | 2011-06-09 | 2011-12-14 | 山西太钢不锈钢股份有限公司 | Manufacturing method of high-strength shaft furnace carbon brick |
| CN104046772A (en) * | 2013-03-15 | 2014-09-17 | 上海梅山钢铁股份有限公司 | Method for making cooled agglomerated pellets by use of converter gas dry-method electrostatic precipitator |
| CN103667691A (en) * | 2013-12-12 | 2014-03-26 | 攀枝花钢城集团有限公司 | High-iron-content pellet for converter steelmaking and preparation method of high-iron-content pellet |
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| CN105950863B (en) * | 2016-05-11 | 2018-07-17 | 江苏省冶金设计院有限公司 | Ferronickel powder forming method |
| CN105950863A (en) * | 2016-05-11 | 2016-09-21 | 江苏省冶金设计院有限公司 | Ferronickel powder forming method |
| CN107488784A (en) * | 2017-09-06 | 2017-12-19 | 安徽工业大学 | A kind of blast furnace ironmaking superfluxed pellets and its production method |
| CN107488784B (en) * | 2017-09-06 | 2019-07-26 | 安徽工业大学 | A kind of blast furnace ironmaking superfluxed pellets and its production method |
| CN113366128A (en) * | 2018-12-12 | 2021-09-07 | 耶稣大拇指 | A method of briquetting coal from pellet fines, DRI sludge, DRI fines and residual fines from DRI dust treatment system |
| CN109628735A (en) * | 2019-02-14 | 2019-04-16 | 武汉科技大学 | The method for preparing cooled agglomerated pellet using revolving furnace mud |
| CN113166844A (en) * | 2019-11-05 | 2021-07-23 | 淡水河谷公司 | Iron ore powder agglomerate production method and agglomerated product |
| CN113736991A (en) * | 2020-05-27 | 2021-12-03 | 上海梅山钢铁股份有限公司 | Self-fluxing cold-pressing composite furnace charge for blast furnace ironmaking and preparation method thereof |
| CN114763583A (en) * | 2021-01-15 | 2022-07-19 | 宝山钢铁股份有限公司 | Preparation method of iron ore powder cold briquetting and application of iron ore powder cold briquetting |
| CN114763583B (en) * | 2021-01-15 | 2023-09-12 | 宝山钢铁股份有限公司 | Preparation method of iron ore powder cold-pressed pellet and application of iron ore powder cold-pressed pellet |
| CN114525402A (en) * | 2022-04-22 | 2022-05-24 | 唐山金沙燃烧热能股份有限公司 | Preparation method and application of blast furnace sintering-free cold-bonded pellet |
| CN117758044A (en) * | 2023-12-25 | 2024-03-26 | 北京辰兴环宇高新技术发展有限公司 | Adhesive for high-temperature-resistant cold bonded pellets, cold bonded pellets and preparation method of cold bonded pellets |
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| CN1055320C (en) | 2000-08-09 |
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