CN1077602C - Spheroidized iron-coke ore solidified rapidly at middle temp and its apparatus - Google Patents
Spheroidized iron-coke ore solidified rapidly at middle temp and its apparatus Download PDFInfo
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- CN1077602C CN1077602C CN99113175A CN99113175A CN1077602C CN 1077602 C CN1077602 C CN 1077602C CN 99113175 A CN99113175 A CN 99113175A CN 99113175 A CN99113175 A CN 99113175A CN 1077602 C CN1077602 C CN 1077602C
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Abstract
The present invention relates to a spheroidized iron-coke ore solidified rapidly at a moderate temperature and an apparatus thereof, which is used for the preparation operation of charge before black metal smelting. The spheroidized iron-coke ore of the present invention can be used for a cooling agent and direct reduction charge of blast furnace iron making and converter steelmaking; the present invention is characterized in that raw material containing iron is used as main material, proper quantity of coke material, coal powder or slaked lime, adhesive is used as composite adhesive, and a moderate temperature rapid solidification iron-coke ore technology and a drying apparatus thereof are adopted. The present invention breaks through difficulties of high requirements of the technical conditions, complex technologies and long solidification time for a cold solidification agglomeration process, creates conditions for constructing factories of continuous production, enhances the output of blast furnaces, and reduces ironmaking cost.
Description
The present invention relates to the manufacture method and the drying plant of warm Spheroidized iron-coke ore solidified rapidly in the preceding furnace charge preparation work one of a kind of ferrous metal smelting, its product can be used for the refrigerant of blast furnace ironmaking, converter steelmaking and directly reduces furnace charge.
At present, domestic and international application generally adopts the furnace charge preparation work before sintering for agglumeration or pelletizing agglomeration are used for smelting iron and steel in the smelting iron and steel technical field, and sintering for agglumeration or pelletizing agglomeration belong to high-temperature concretion agglomeration (1150 ℃-1300 ℃); Smelting in the mineral low-temperature concretion agglomeration technology just caused metallargist's attention and studies and explore in the thirty's of this century.Cold fixed agglomeration methods such as cement cold bonding connection, the steam-cured method of autoclave, carbonation method rustization method successively appearred to the seventies, but the common drawback that they exist is that consolidation time is long, generally need 20-30 days, can not carry out payable continuous production, thereby limit it and applied.Hold the big horse mining industry of close peace institute as the U.S. and made compound with iron ore concentrate, ferrous waste, coke powder in 1970, make pelletizing with balling disc, be to feed 200 ℃ water vapor health in the autoclave of 2MPa at pressure then, employing cement is binding agent, obtains quality and can satisfy the pellet that diameter is used for the 2.44M blast furnace.Nineteen eighty-three NKK's production unfired pellets that once carbonating and the steam-cured method of autoclave combined, consolidation time is shortened 10 hours, but its production technique relative complex, consolidation time is still longer, thereby is not also applied in industrial production.China has also begun research unfired pellets or nodulizing the fifties, as above " the producing the method for direct reduction shaft furnace and blast furnace cold-bonded pellet " of Hypon mountain Iron And Steel Company research, its consolidation time shortens to 30-60 minutes widely, but in binding agent, be added with wilkinite, reduced the iron grade of pellet, require coke fines size＜3mm simultaneously, increased fragmentation, the sieving technology link.
The manufacture method of warm Spheroidized iron-coke ore solidified rapidly among the present invention, adopted rational binding agent, suitably improved the oven dry consolidation temperature, and designed effective drying plant, shortened consolidation time, realized the industrialization continuous production, its purpose be in, small furnace provides a kind of less investment, it is fast to go into operation, produce the high-quality furnace charge stable, that quality is high, cost is low, in having overcome at present, to adopt native pelletizing be wasting energy of bringing of furnace charge, contaminate environment, of poor quality, shortcoming such as labour intensity is big to small furnace, reduced the smelting cost of medium and small blast furnace.
The manufacture method of warm Spheroidized iron-coke ore solidified rapidly and drying plant content Description among the present invention:
In the manufacture method of warm Spheroidized iron-coke ore solidified rapidly, it is characterized in that: major ingredient, iron-bearing material comprises: iron ore concentrate, rich ore material, metallurgical dust, dedusting mud, iron scale, pyrite cinder, with addition of an amount of coke powder, coal dust, binding agent is the compound binding agent that liquid water glass, magnesia, pitch is formed;
1. the manufacture method of middle temperature Spheroidized iron-coke ore solidified rapidly:
(1) main raw materials in proportion is as follows: in weight %
A. 60-80% iron-bearing material, 40-20% coke powder or coal dust add 10-15% compound binding agent of its weight again;
B. according to the Chemical Composition analytical results of various raw materials, calculate the amount of allocating into of corresponding slaked lime;
(2) mixing of compound
After compound preparation is finished, it is sent into general cement mixer carry out mixing, the compound binding agent of its weight 10～15% adds at this moment, makes itself and the abundant mixing of material.
(3) extrusion forming:
It is 2500～3500N/cm that compound behind the mixing is delivered to pressure through conveyor
2The pair roller ball press in make the avette green briquette that granularity is 25～45mm;
(4) screening:
The avette green briquette that suppresses delivered on the sieve that sieve aperture is 20mm through conveyor sieve, the powder of granularity＜20mm turns back in the pair roller ball press pressure ball once more, and the green briquette of granularity＞20mm is sent into the batch meter of tilting tunnel kiln and entered into through conveyor and is distributed on the fire grate bar in the tunnel kiln;
(5) temperature is fixed in:
The green briquette bed thickness that is distributed on the interior fire grate bar of tilting tunnel kiln is 200～250mm, hot blast is blown in the kiln by hot-wind inlet, by fire grate bar and the bed of material with the green briquette drying, hot waste gas is discharged by Waste gas outlet, after dry 3～10 minutes, open the gape baffle plate, the finished product agglomerate is discharged outside the kiln automatically by the ore discharge slide carriage, and the dolly of packing into is transported.The granularity of finished product iron coke agglomerate is 20～25mm, and its ultimate compression strength is 2200～2500N/, places 800～1000 ℃ the high temperature can be because of the burning efflorescence under static state.
2, drying plant is a tilting tunnel kiln, with level inclination α=50 degree, one batch meter is arranged above the tunnel kiln right side, furnace brickwork using is to be built by laying bricks or stones by refractory fireclay block, bottom in the tilting tunnel kiln has a fire grate bar identical with the tunnel kiln angle of inclination to be connected with the ore discharge slide carriage, be provided with the hot blast import in the bottom of tunnel kiln, a Waste gas outlet is arranged at the top of tunnel kiln, in the termination, left side of tunnel kiln one gape baffle plate is set.
Among the present invention the manufacture method of warm Spheroidized iron-coke ore solidified rapidly and drying plant broken through technically its main cold fixed agglomeration method to the raw material technical qualification have relatively high expectations, the processing condition relative complex, the difficulty that consolidation time is long, for the factory that builds continuity production has created condition, also the environmental improvement for metallurgical works provides an effective means.The iron coke agglomerate that adopts this method to produce because iron mineral closely contacts with coke in the agglomerate, thereby improves the reactivity of coke, has accelerated the reduction rate of iron mineral, has not only improved the output of blast furnace, has also reduced ironmaking cost.At 13M
3Replace 100% agglomerate and part coke with this nodulizing on the blast furnace and smelt that the conditions of blast furnace direct motion has been received in experiment, the blast curve is stable, pig iron output increases by 20% or more, coke ratio reduces 15-20%, pig iron cost reduction 25-30% per ton
Embodiment:
Produce the iron coke agglomerate: (because this product does not require basicity, so do not add slaked lime in the compound) get the coke powder of revolving furnace mud, granularity＜10mm, the ratio of (doing) by weight 7: 3 cooperates, mix with cement mixer, in compound, add simultaneously 10% compound binding agent, mix after conveyor is delivered to pressure is 2500N/cm
3The pair roller ball press in, making granularity is the avette green briquette of 25mm, deliver on the sieve that sieve aperture is 20mm through conveyor and to sieve, the powder of granularity＜20mm turns back in the pair roller ball press pressure ball once more, the green briquette of granularity＞20mm is sent into batch meter (see figure 1) on the tilting tunnel kiln through conveyor, and enter and be distributed in the tunnel kiln on the fire grate bar 3, the thickness of the green briquette bed of material is 200mm, furnace brickwork using 2 is to be built by laying bricks or stones by refractory fireclay block, hot blast is blown in the kiln by hot-wind inlet 4, hot blast temperature is controlled at 600 ℃, and with the green briquette drying, hot waste gas is discharged by Waste gas outlet 7 by fire grate bar 3 and the bed of material.After dry 3 minutes, open gape baffle plate 6, the finished product agglomerate just discharges out of the furnace automatically, pushes away away stacking through ore discharge slide carriage 5 dolly of packing into.The iron coke agglomerate that makes, its ultimate compression strength on average reach 2300N/, freely drop on the thick steel plate of 10mm not brokenly more than 10 times from 1.5 meters eminences, place 800-1000 ℃ the high temperature can be because of the burning efflorescence under static state.
At 13M
3Blast furnace in when transforming common agglomerate and part coke and smelt with the rapidly solidified iron coke nodulizing 100% of temperature in this, because thereby iron mineral contact with coke closely and improved the reactivity of coke and the reduction rate of iron mineral in the nodulizing, obtained that conditions of blast furnace direct motion, blast curve are stable, the good economical effectiveness of pig iron output increase by 20%, coke ratio reduction by 18%, pig iron cost per ton reduction by 28%.
Claims (2)
1, the manufacture method of middle temperature Spheroidized iron-coke ore solidified rapidly, it is characterized in that: major ingredient, iron-bearing material comprises: iron ore concentrate, rich ore material, metallurgical dust, dedusting mud, iron scale, pyrite cinder, with addition of an amount of coke powder, coal dust, binding agent is the compound binding agent that liquid water glass, magnesia, pitch is formed;
In the manufacture method of warm Spheroidized iron-coke ore solidified rapidly:
(1) main raw materials in proportion is as follows: in weight %
A. 60-80% iron-bearing material, 40-20% coke powder or coal dust add 10-15% compound binding agent of its weight again;
B. according to the Chemical Composition analytical results of various raw materials, calculate the amount of allocating into of corresponding slaked lime;
(2) mixing of compound
After compound preparation is finished, it is sent into general cement mixer carry out mixing, the compound binding agent of its weight 10～15% adds at this moment, makes itself and the abundant mixing of material;
(3) extrusion forming:
It is 2500～3500N/cm that compound behind the mixing is delivered to pressure through conveyor
2The pair roller ball press in make the avette green briquette that granularity is 25～45mm;
(4) screening:
The avette green briquette that suppresses delivered on the sieve that sieve aperture is 20mm through conveyor sieve, the powder of granularity＜20mm turns back in the pair roller ball press pressure ball once more, and the green briquette of granularity＞20mm is sent into the batch meter of tilting tunnel kiln and entered into through conveyor and is distributed on the fire grate bar in the tunnel kiln;
(5) temperature is fixed in:
The green briquette bed thickness that is distributed on the interior fire grate bar of tilting tunnel kiln is 200～250mm, hot blast is blown in the kiln by hot-wind inlet, by fire grate bar and the bed of material with the green briquette drying, hot waste gas is discharged by Waste gas outlet, after dry 3～10 minutes, open the gape baffle plate, the finished product agglomerate is discharged outside the kiln automatically by the ore discharge slide carriage, and the dolly of packing into is transported.The granularity of finished product iron coke agglomerate is 20～25mm, and its ultimate compression strength is 2200～2500N/, places 800～1000 ℃ the high temperature can be because of the burning efflorescence under static state.
2, the drying plant of warm Spheroidized iron-coke ore solidified rapidly in according to claim 1, it is characterized in that: said drying plant is a tilting tunnel kiln, with level inclination α=50 degree, one batch meter is arranged above the tunnel kiln right side, furnace brickwork using is to be built by laying bricks or stones by refractory fireclay block, bottom in the tilting tunnel kiln has a fire grate bar identical with the tunnel kiln angle of inclination to be connected with the ore discharge slide carriage, be provided with the hot blast import in the bottom of tunnel kiln, one Waste gas outlet is arranged at the top of tunnel kiln, in the termination, left side of tunnel kiln one gape baffle plate is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99113175A CN1077602C (en) | 1999-08-20 | 1999-08-20 | Spheroidized iron-coke ore solidified rapidly at middle temp and its apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN99113175A CN1077602C (en) | 1999-08-20 | 1999-08-20 | Spheroidized iron-coke ore solidified rapidly at middle temp and its apparatus |
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| Publication Number | Publication Date |
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| CN1243885A CN1243885A (en) | 2000-02-09 |
| CN1077602C true CN1077602C (en) | 2002-01-09 |
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| CN99113175A Expired - Fee Related CN1077602C (en) | 1999-08-20 | 1999-08-20 | Spheroidized iron-coke ore solidified rapidly at middle temp and its apparatus |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009030064A1 (en) * | 2007-09-03 | 2009-03-12 | Shutong Dong | A process for non-coke smelting iron and steel |
| CN101492767B (en) * | 2008-01-23 | 2010-12-08 | 四川龙蟒矿冶有限责任公司 | Multi-stage whole-granule processing method and equipment for direct reduction of greenball |
| JP4666112B2 (en) * | 2009-07-29 | 2011-04-06 | Ｊｆｅスチール株式会社 | Ferro-coke manufacturing method |
| JP2011084734A (en) * | 2009-09-15 | 2011-04-28 | Jfe Steel Corp | Method for producing ferro coke |
| CN102782095B (en) * | 2010-03-03 | 2015-07-01 | 杰富意钢铁株式会社 | Process for producing ferro coke for metallurgy |
| CN104911344B (en) * | 2015-06-26 | 2017-04-12 | 长沙矿冶研究院有限责任公司 | Method for producing ore briquettes from fine ores with pitch as adhesive, ore briquettes and application of ore briquettes |
| CN110093503B (en) * | 2019-06-05 | 2020-11-24 | 东北大学 | Method for preventing cold-pressed iron coke from being carbonized and bonded |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1007628B (en) * | 1955-01-07 | 1957-05-02 | Henricus Franciscus Josef Bern | Plunger pump, in particular for driving a hydraulic adjustment mechanism |
| CN1005092B (en) * | 1985-12-29 | 1989-09-06 | 东北重型机械学院 | Dieless spinning machine for seal vessel head driven by hydraulic oil motor |
| SU1659502A1 (en) * | 1989-07-31 | 1991-06-30 | Институт черной металлургии | Method of producing iron ore pellets |
| DE4314403A1 (en) * | 1992-07-01 | 1994-01-05 | Kloeckner Humboldt Deutz Ag | Process and plant for the production of mechanically and thermally stable, low-gas agglomerates such as briquettes or pellets |
| EP0927770A1 (en) * | 1998-01-05 | 1999-07-07 | Orinoco Iron, C.A. a corporation of Venezuela | High carbon content iron-base briquettes and process for preparing same |
-
1999
- 1999-08-20 CN CN99113175A patent/CN1077602C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1007628B (en) * | 1955-01-07 | 1957-05-02 | Henricus Franciscus Josef Bern | Plunger pump, in particular for driving a hydraulic adjustment mechanism |
| CN1005092B (en) * | 1985-12-29 | 1989-09-06 | 东北重型机械学院 | Dieless spinning machine for seal vessel head driven by hydraulic oil motor |
| SU1659502A1 (en) * | 1989-07-31 | 1991-06-30 | Институт черной металлургии | Method of producing iron ore pellets |
| DE4314403A1 (en) * | 1992-07-01 | 1994-01-05 | Kloeckner Humboldt Deutz Ag | Process and plant for the production of mechanically and thermally stable, low-gas agglomerates such as briquettes or pellets |
| EP0927770A1 (en) * | 1998-01-05 | 1999-07-07 | Orinoco Iron, C.A. a corporation of Venezuela | High carbon content iron-base briquettes and process for preparing same |
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| CN1243885A (en) | 2000-02-09 |
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