CN1207408C - Process for preparing high iron low silicon agglomerate - Google Patents
Process for preparing high iron low silicon agglomerate Download PDFInfo
- Publication number
- CN1207408C CN1207408C CN 01114546 CN01114546A CN1207408C CN 1207408 C CN1207408 C CN 1207408C CN 01114546 CN01114546 CN 01114546 CN 01114546 A CN01114546 A CN 01114546A CN 1207408 C CN1207408 C CN 1207408C
- Authority
- CN
- China
- Prior art keywords
- compound
- agglomerate
- iron
- particles
- mix
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The present invention relates to a process for preparing an agglomerate with high iron and low silicon. In the method, a coarse agglomerate powder and a return ore are used as nucleating particles, the alkalinity is the natural alkalinity of the nucleating particles, a fine iron concentrate and a miscellaneous material containing iron are used as adhering particles whose alkalinity is 1.8 to 6.0, and the adhering particles adhere to the surfaces of the nucleating particles so as to form 3 to 8mm of accurate particles with the average particle size of 2 to 4.5mm. The method is favorable to improvement in agglomerate grades, reduction in the content of silicon dioxide in the agglomerate, reduction in the amount of slag during blast furnace smelting, improvement in the blowing amount of coal powders, and reduction in the cost of pig iron, enables the burnup of agglomerative solids to descend by 10 to 20%, and has strong adaptability to production and application in iron and steel enterprises without changing the structure of furnace charge in iron and steel enterprises.
Description
Technical field
The invention belongs to the ferrous metallurgy field.
Background technology
Agglomerate remains the main iron-smelting raw material in the world, and the quality of its quality is the important factor that directly influences furnace processor and coke ratio.Especially with the development of modern blast furnace ironmaking technology, more and more higher to the requirement of sinter quality, not only require the sinter strength height, and require agglomerate to improve constantly the iron grade, smelt to guarantee the low quantity of slag of blast furnace, improve the breeze blowing ratio.Sinter quality depends on the progress of sintering technology, when guaranteeing sinter strength again, adopt high basicity, the high bed of material, low water low-carbon (LC) usually when improving grade of sinter, strengthen granulate, the fuel branch adds, hot gas sintering and increase a series of measures such as imported iron ore fines proportioning.Even so, both at home and abroad sintering plant be not less than 30% in the concentrate proportioning, grade of sinter greater than 57～58%, sinter basicity 1.6～1.8 o'clock, the best barrate strength of agglomerate (+6.3mm) about 60%.
Summary of the invention
In order both to guarantee the iron grade of agglomerate, guarantee sinter strength again, special proposition the present invention.
The present invention with coarse grain sintering breeze with return mine to becoming nuclear particle, basicity is its natural alkalinity, be 0.2～1.6, do adhered particles with assorted material of granule iron concentrate and iron content and particulate flux, its basicity is 1.8～6.0, adhered particles is sticked to the nucleation particle surface, form the accurate particle of 3～8mm, mean particle size is 2～4.5mm.
The present invention with the sintering breeze, return mine and flux, coke powder are that feed proportioning is formed into the nuclear particle compound, compound basicity is 0.2～1.6, the present invention also stirs in machine,massing in advance with assorted material of granule iron concentrate and particulate iron content and particulate flux (unslaked lime or Wingdale), form adhered particles, adhered particles basicity is 1.8～6.0, adhered particles compound and nucleation compound twice mixing granulation in drum mixer, to the compound behind the mixing granulation carry out sintering, cooling and agglomerate fragmentation, sieve agglomerate.
The present invention also can stir in machine,massing in advance with assorted material of granule iron concentrate and particulate iron content and particulate flux (unslaked lime or Wingdale); form adhered particles; material basicity is 1.8～6.0; in balling disc or drum pelletizer, granulate then; again with nucleation mix particles material twice mixing granulation in drum mixer, to compound carry out sintering, cooling and agglomerate fragmentation, sieve agglomerate.
Abundant burning in order to ensure coke powder, thereby dosage of coke is descended, the present invention changes coke powder and adds mode, dividing three times before the second time of particulate adhered materials, one-tenth nuclear particle material and final blending material, cylinder mixed respectively adds, the ratio of allocating into for three times is 1: 0～1: 0～1, and the unit solid burnup is 40～45kg/t.
In order both to make the effect of compound generation by particle segregation, make compound obtain preheating again, eliminated wet band, reduce thermosteresis, improve the ventilation property of sinter bed, thereby improve agglomerate output, the cloth of the compound after the present invention mixes two combines preheating with segregation distribution, and steam or hot blast and reflector are blown into the sintered compound bed of material in vertical direction.
Machine,massing cylindrical shell used in the present invention is tapered, cylindrical shell and paddle crop rotation relative movement, and drum speed is 0～100r.p.m, the paddle wheel rotating speed is 600～1200r.p.m.
Compared with prior art, the present invention has the following advantages:
A. improve grade of sinter, make grade of sinter bring up to 58～60% from about 56%, reduce dioxide-containing silica in the agglomerate, dioxide-containing silica drops to below 4.8% from 5～6%; The quantity of slag when reducing blast-furnace smelting helps blast furnace and improves coal powder blowing amount, reduces pig iron cost.
Although b. grade of sinter improves, dioxide-containing silica descends, in sinter basicity 1.6～1.8 o'clock, sinter strength and agglomerate output are greatly enhanced, sintered ore rotary drum strength improves 8～15 percentage points, utilization coefficient improves 10～25%, and sintering solid burnup descends 10～20%.
C. when grade of sinter raising, dioxide-containing silica decline, sinter basicity still can remain unchanged, promptly do not need to improve sinter strength, need not to change the burden structure of iron and steel enterprise by the measure of taking conventional raising basicity, stronger to the adaptability of iron and steel enterprise's production application.
D. segregation distribution and preheating of mixed material are organically combined, utilize the steam of agglomerate refrigerative hot waste gas or generation to make thermal medium, produce the hot blast field of force, improved the pre-heat effect of compound, reduce thermosteresis, segregation distribution improves bed permeability, thereby improves agglomerate output, reduces solid fuel consumption.
Description of drawings
Fig. 1: process flow diagram of the present invention;
Fig. 2: stirrer running synoptic diagram;
Fig. 3: the segregation distribution synoptic diagram, wherein: 1-feed bin, 2-mud roller, 3-reflector, 4-pallet, 5-hot blast or vapour pipe.
Embodiment
1. sintering breeze (South Africa powder, Australia's powder and domestic powder) 75%, granule iron concentrate 25%, join outward and return mine 30%, join coke powder 5.0% outward, mixture moisture 6.0%, basicity 1.8, the mixture (basicity is 2.8) of granule iron concentrate and particulate flux (unslaked lime or Wingdale) was adopted the machine,massing pre-treatment separately 1 minute, then with fine ore, flux, return mine and fuel mix material (basicity 1.10) through twice mixing of drum mixer and granulation, obtain following index: sintered ore rotary drum strength (+6.3mm) 65%, yield rate 79.9%, utilization coefficient 1.73t/m
2.h, solid burnup 50kg/t.s, agglomerate iron grade 58.1%, SiO
24.75%, sinter basicity 1.79.And it is as follows to adopt the normal sintering method to obtain index: and sintered ore rotary drum strength (+6.3mm) 60%, yield rate 73.3%, utilization coefficient 1.52t/m
2.h, solid burnup 56kg/t.s, agglomerate iron grade 57.7%, SiO
24.8%.
2. with embodiment 1; the mixture (basicity is 2.8) of granule iron concentrate and particulate flux (unslaked lime or Wingdale) was adopted the machine,massing pre-treatment separately 1 minute; in the disk pelletizing machine, granulated 3 minutes again; at last with fine ore, flux, return mine and fuel mix material (basicity 1.10) mixes for twice and granulation through drum mixer; it is as follows to obtain index: sintered ore rotary drum strength (+6.3mm) 67%; yield rate 80.3%, utilization coefficient 1.83t/m
2.h, solid burnup 41kg/t.s, agglomerate iron grade 58.0%, SiO
24.78%., sinter basicity 1.78.
3. with embodiment 1; the mixture (basicity is 5.0) of granule iron concentrate and particulate flux (unslaked lime or Wingdale) was adopted the machine,massing pre-treatment separately 1 minute; in the disk pelletizing machine, granulated 3 minutes again; at last with fine ore, flux, return mine and fuel mix material (basicity 0.8) mixes for twice and granulation through drum mixer; it is as follows to obtain index: sintered ore rotary drum strength (+6.3mm) 67%; yield rate 80.3%, utilization coefficient 1.77t/m
2.h, solid burnup 49kg/t.s, agglomerate iron grade 58.0%, SiO
24.78%, sinter basicity 1.81.
4. with embodiment 1, with fine ore, fine concentrate, flux, return mine and the fuel mix material through twice mixing of drum mixer and granulation, carry out sintering with behind the steam preheating to 75 ℃ then, obtain following index: sintered ore rotary drum strength (+6.3mm) 63%, yield rate 77.3%, utilization coefficient 1.68t/m
2.h, solid burnup 49kg/t.s, agglomerate iron grade 58.0%, SiO
24.83%, sinter basicity 1.80.
5. raw material is with embodiment 1, adopt the treatment process among the embodiment 2, difference be to fine ore, flux, return mine and the fuel mix material in allocate 35% limonite into, and limonite is with addition of unslaked lime, in machine,massing, stir separately, through twice mixing of drum mixer and granulation, obtain following index again: sintered ore rotary drum strength (+6.3mm) 64%, yield rate 76.8%, utilization coefficient 1.57t/m
2.h, solid burnup 55kg/t.s, agglomerate iron grade 58.0%, SiO
24.78%, sinter basicity 1.80.
Claims (4)
1. process for preparing high iron low silicon agglomerate, comprise with the sintering breeze, return mine and flux, coke powder is that feed proportioning is formed into the nuclear particle compound, nucleation mix particles material basicity is 0.2～1.6, adopt drum mixer to mix to becoming nuclear particle and adhered particles compound to carry out one, two mix, cloth, sintering, cooling, crushing and screening gets agglomerate, it is characterized in that: also comprise assorted material of granule iron concentrate and particulate iron content and particulate flux are stirred in machine,massing separately, form the adhered particles compound, its basicity is 1.8～6.0, the machine,massing cylindrical shell is tapered, cylindrical shell and paddle crop rotation relative movement, and drum speed is 0～100r.p.m, the paddle wheel rotating speed is 600～1200r.p.m, the adhered particles compound with nucleation mix particles material twice mixing granulation in drum mixer, is formed the accurate particle of 3～8mm, and mean particle size is 2～4.5mm.
2. method according to claim 1 is characterized in that: after the adhered particles compound forms, earlier the adhered particles compound is granulated in balling disc or drum pelletizer, again with nucleation mix particles material twice mixing granulation in drum mixer.
3. method according to claim 1, it is characterized in that: coke powder adding mode adds for adhering to compound, nucleation mix particles material and finally divide three times before the mixing barrel mixing second time of both compounds at particulate respectively, the ratio of allocating into for three times is 1: 0～1: 0～1, and the unit solid burnup is 40～45kg/t.
4. method according to claim 1 is characterized in that: the method that two clothes that mix the back compound adopt preheating to combine with wind-force field segregation distribution, steam or hot blast and cloth reflector are blown into the sintered compound bed of material in vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114546 CN1207408C (en) | 2001-06-15 | 2001-06-15 | Process for preparing high iron low silicon agglomerate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114546 CN1207408C (en) | 2001-06-15 | 2001-06-15 | Process for preparing high iron low silicon agglomerate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1392273A CN1392273A (en) | 2003-01-22 |
| CN1207408C true CN1207408C (en) | 2005-06-22 |
Family
ID=4661184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01114546 Expired - Fee Related CN1207408C (en) | 2001-06-15 | 2001-06-15 | Process for preparing high iron low silicon agglomerate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1207408C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104232883B (en) * | 2013-06-19 | 2016-12-28 | 宝山钢铁股份有限公司 | A kind of mineral aggregate using method improving cemented iron concentrate consumption and productivity ratio |
| CN103305690A (en) * | 2013-06-25 | 2013-09-18 | 中南大学 | Pre-pressing forming and intensified sintering method of fine iron ore concentrate |
| CN103572042B (en) * | 2013-11-27 | 2015-02-04 | 武汉钢铁(集团)公司 | Method for preparing sintering mixture by specularite powder |
| CN104099466B (en) * | 2014-07-09 | 2016-01-20 | 河北钢铁股份有限公司邯郸分公司 | A kind of manufacture method of bilayer structure pelletizing and production unit |
| CN104923780B (en) * | 2015-06-11 | 2017-08-11 | 武汉钢铁有限公司 | A kind of detection method of nucleation performance |
| CN108396136B (en) * | 2017-02-05 | 2019-06-25 | 鞍钢股份有限公司 | A kind of sintered compound preparation method for material and its distributing method and device |
| CN109423555B (en) * | 2017-08-23 | 2020-10-27 | 宝山钢铁股份有限公司 | Efficient iron ore sintering method using low-silicon iron fine powder |
| CN108929950B (en) * | 2018-06-28 | 2019-10-25 | 武汉钢铁有限公司 | A kind of Iron Ore Matching in Sintering method based on mixture granulation characteristic |
| CN109652643B (en) * | 2019-01-30 | 2020-09-01 | 中南大学 | High-quality sinter for COREX smelting reduction iron-making process and preparation method thereof |
| CN115505730B (en) * | 2022-10-24 | 2024-02-09 | 江苏沙钢集团有限公司 | Sinter production process capable of eliminating blending material pile |
-
2001
- 2001-06-15 CN CN 01114546 patent/CN1207408C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1392273A (en) | 2003-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100537794C (en) | Composite agglomeration technology of iron powdered ore | |
| CN100529120C (en) | Sintering method for high-chromic vanadium-titanium ferroferrite | |
| CN102206744B (en) | Method for granulating sinter mixture | |
| CN103627894B (en) | A kind of v-ti magnetite concentrate is with addition of the sintering method of spathic iron ore | |
| CN1207408C (en) | Process for preparing high iron low silicon agglomerate | |
| CN1523122A (en) | Carburant for steel-making and producing process and method of using thereof | |
| CN101476001B (en) | Method for smelting medium titanium slag by blast furnace | |
| CN102936653B (en) | Method for reducing high-density metallized pellet | |
| CN105177279A (en) | Method for improving quality of high-chromium vanadium and titanium sinter | |
| CN102127636A (en) | Method for preparing low-SiO2 high-performance sinter ore | |
| CN1045111C (en) | Method for making quicklime iron concentrate briquette agglomerate | |
| CN101381809A (en) | Method for preparing sintering ore of vanadium-titanium magnetite ore | |
| CN104232822A (en) | Method for carrying out blast furnace iron making on high-phosphorus oolitic hematite and vanadium titano-magnetite | |
| CN1042651C (en) | Manufacture method of vanadic titanium type ultra-high basicity agglomerate | |
| CN101532083A (en) | Method for charging iron ore sintering flux and device thereof | |
| CN102925675A (en) | Method for recovering sludge from smelting ironmaking | |
| CN1037193C (en) | Method for producing direct reduced iron | |
| CN103614548B (en) | Method for producing sinter from hematite concentrate powder | |
| CN1844418A (en) | Preprocessing and reinforced sintering method for iron charge | |
| CN103343219A (en) | Method for producing sintered ore by using quick lime | |
| CN1033919C (en) | Method of low-temp. agglutinating bloodstone and limonite dust | |
| CN1037917C (en) | Technique for smelting ferrochrome using powdered Cr ore reductive sintered blocks | |
| CN1042188A (en) | Geminus temperature control sintering method | |
| CN103031430A (en) | Method for making sintering bed charge by returning mine at high mixture ratio | |
| CN85100645A (en) | Double-sphere sintering technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |