CN102181630B - Method for using paigeite powder in sintering - Google Patents
Method for using paigeite powder in sintering Download PDFInfo
- Publication number
- CN102181630B CN102181630B CN2011100912988A CN201110091298A CN102181630B CN 102181630 B CN102181630 B CN 102181630B CN 2011100912988 A CN2011100912988 A CN 2011100912988A CN 201110091298 A CN201110091298 A CN 201110091298A CN 102181630 B CN102181630 B CN 102181630B
- Authority
- CN
- China
- Prior art keywords
- sintering
- powder
- percent
- agglomerate
- paigeite
- 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.)
- Active
Links
Images
Abstract
The invention relates to a method for using paigeite powder in sintering, and belongs to the technical field of iron ore powder sintering. The method comprises the following steps of: preparing raw materials, mixing, granulating, distributing the raw materials, igniting, sintering, crushing, cooling, and detecting indexes of sintered ore. The iron-containing raw materials of the sintered ore comprise 8 to 12 percent of paigeite, 4.5 to 5.5 percent of calcined lime, 1 to 3 percent of dolomite, 5 to 7 percent of limestone and 4.0 to 5.0 percent of coke powder; and the alkalinity CaO/SiO2 of the sintering ores is equal to between 1.8 and 2.0, TFe content in the sintered ore is between 55 and 58 percent, MgO content in the sintered ore is between 1.9 and 2.3 percent, and FeO content in the sintered ore is between 6.0 and 7.5 percent. In the method, local powder (or Australian fine powder) and a MgO mass fluxing agent (such as the dolomite) are replaced by the paigeite powder simultaneously, so the paigeite powder can be used reasonably, the total proportioning of the fluxing agent is reduced by 10 percent, the quality of the sintered ore is improved, and the concept of concentrates is met.
Description
Technical field
The invention belongs to mineral and utilize technical field, particularly relate to the method for using the ferro-boron breeze in a kind of sintering, the proportioning of paigeite in sintering reached 10%.Think that the proportioning of ferro-boron breeze has the space of further lifting.
Background technology
China's boron resource has characteristics such as reserves are abundant, kind is many, ore grade is lower, common associated mineral is many, place of production distribution imbalance.
The theoretical content 17.83% of ludwigite (MgFe) 3Fe [BO3] O2:B2O3, form have multiple crystalline forms such as needle-like, column, fibrous, short cylinder-granular aggregate; Have pearl, adamantine luster; Color has black and blackish green; Density is 3.60～4.70g/cm3, and the Mohs' hardness interval is 5.5～6.0, and is water insoluble.
The B2O3 fusing point is lower, occurs with the vitreum form usually in the industrial production, begins fusion about 600 ℃.Boron is one of element the most stable in the crystal chemistry stablizer.Because the B3+ radius is little, at high temperature can get in the multi mineral lattice, promote calcium ferrite to generate and the polymerization of rhombohedral iron ore grain growth, reduce the growing amount of 2CaOSiO2.After adding boron in the sinter mixture, promoted liquid phase to generate quantity and reduced the viscosity of sosoloid fusing point and liquid phase slag, these lower melting point liquid phases in process of cooling as the phase that bonds; Parcel 2CaOSiO2 crystal grain; Can suppress the heterogeneous transformation of homogeneity of 2CaOSiO2, β-2CaOSiO2 is stablized, reduce the destruction of agglomerate internal stress; The sintering ore pulverization rate is reduced, and sinter strength improves.The adding of boron magnesium iron ore concentrate has promoted the generation of agglomerate calcium ferrite and the increase of amount of liquid phase; Therefore make the mineral composition and the microstructure generation considerable change of agglomerate, grain size is tending towards evenly, and intercrystalline bonding phasor increases; The agglomerate crystal is grown up; Interconnect, the agglomerate grade distributes trend evenly, and the amount of powder of＜5mm reduces.The low temperature reduction degradation index that helps alleviating agglomerate with addition of boron magnesium iron ore concentrate.The the underlying cause of agglomerate generation low temperature reduction degradation be regeneration Fe2O3 in the agglomerate when low temperature (450～550 ℃), be reduced into γ-Fe2O3 by α-Fe2O3.Because the former is the trigonal system hexagonal lattice; The latter is the tesseral system cubic(al)grating; The lattice change having taken place under the effect of reducing gas, caused distortion, the cracking of structure, has produced great internal stress; Cause pulverizing serious under mechanical force to be split, the low temperature reduction degradation index of agglomerate is raise.Promote the generation of calcium ferrite in the agglomerate behind the boron magnesium iron ore concentrate, reduced regeneration Fe2O3 quantity.In addition,, a certain amount of B2O3 is arranged in the agglomerate, blast-furnace smelting is improved slag fluidity will benefit, help reducing iron loss, reduce molten iron per ton ore deposit consumption because B2O3 is a low melting point.The distribution of boracic agglomerate grade improves, intensity improves.Therefore the agglomerate behind the ferro-boron concentrate helps improving the blast furnace permeability of stock column and distributes with coal gas, helps furnace condition anterograde, helps blast furnace raising the output, joint Jiao.
Have the meaning of improving sinter quality with addition of paigeite in the sintering, but throughout the year, be subject to the chemical ingredients of paigeite, its always being restricted in sintering with addition of ratio, paigeite is using as a kind of " additive " always.How paigeite being substituted the effect of using powdered iron ore and alternative flux always and bring into play simultaneously, is the key that improves the paigeite proportioning.
Summary of the invention
The object of the present invention is to provide the method for using the ferro-boron breeze in a kind of sintering; Overcome in the past ferro-boron breeze proportioning restricted in sintering, can only (can't reach in 10% as a kind of defective of additive in proportioning; Sinter quality and composition improve simultaneously); Use paigeite to substitute MgO matter flux simultaneously and (, the proportioning of paigeite in sintering reached 10% like rhombspar and powdered iron ore.
The present invention includes: batching, mixing, cloth, igniting, sintering, hot fragmentation, hot screening, cooling, screening, sintering performance detect.The following technical parameter of control in technology:
1) raw material is equipped with: use the paigeite of 8-12% in the iron-bearing material, unslaked lime 4.5-5.5%, rhombspar 1-3%, Wingdale 5-7%, coke powder 4.0-5.0%; The basicity CaO/SiO of this agglomerate simultaneously
2=1.8-2.0, TFe content are 55-58%, and MgO content is 1.9-2.3%, and FeO content is 6.0-7.5%;
2) mix: selected material component is transported in drum mixer, adds an amount of moistening material of moisture, the water distribution quantity of raw material is controlled between 7 ± 0.5%, and makes raw materials mix even;
3) granulate: the raw material that mixes is transported in the secondary drum mixer granulates, time 2-3min granulates;
4) cloth: the feed particles after will granulating evenly dispenses on the sintering pallet, and the gauge control that makes sinter bed is in the scope of 500-800mm;
5) igniting: control sinter machine ignition temperature be 950-1200 ℃, ignition time 1-3min, the igniting negative pressure is 5000-7000Pa;
6) sintering: after ignition of sintering process finished, the coke powder in the raw material took fire, and control sintering negative pressure is 7000-12000Pa;
7) cooling: adopt cooling or the outer cooling mode of machine on any machine, the temperature of agglomerate is reduced to below 200 ℃;
8) screening: adopting sieve aperture is that the vibratory screening apparatus of the 4.5-6mm particle after to processing under cooling sieves, and screen underflow is a sinter return fine, and screen overflow is the finished product agglomerate.
9) the agglomerate index detects: size composition, barrate strength to agglomerate detect and analyze.
Behind paigeite, the quality of agglomerate does not worsen, and improvement is to a certain degree arranged on the contrary.
SiO
2Content is 4.0-4.5%, basicity CaO/SiO
2Be 1.8-2.0; Through improving the method (bringing up to 5.0-6.0%) of dosage of coke from 3.0-4.0%; The FeO content of agglomerate is brought up to 8-10% from 5-6%, thereby make tumbler index (bringing up to 83.6%), the low temperature reduction degradation index (RDI of agglomerate from 82%
+ 3.15Bring up to 51% from 39%) and reductibility index (bringing up to 85%) from 79% improve simultaneously.
Under the reference scheme condition (the iron charge proportioning is: 25% Australia powder A, 30% Australia powder B, 5% Brazilian powder A, 15% Brazilian powder B and 10% local powder E, and 15% blast furnace is returned mine, and flux is for joining outward; Unslaked lime 5%, rhombspar 5.45%, Wingdale 4.95%); When using paigeite to substitute local powder E or Australia powder A, reduce the proportioning of MgO matter flux (rhombspar), adjustment Wingdale proportioning; Make the paigeite proportioning reach 8-12%; Local powder or Australia's powder ratio correspondingly reduce 8-12%, and the rhombspar proportioning is reduced to 2-3% from 4-5%, and proportion design agglomerate chemical ingredients is: TFe 55-58%, FeO 6-7.5%, CaO 9-11%, SiO
24.9-5.2%, MgO 1.9-2.3%, Al
2O
31.7-2.0%.Finally, when using paigeite to substitute local powder or Australia fine powder, also substitute MgO matter flux, realized resources effective utilization and flux minimizing.
The invention has the advantages that:
1, use the lower paigeite of price to substitute local powder or Australia fine powder, reduced simultaneously MgO matter flux with addition of amount, realized low-quality resources effective utilization;
2, behind the reduction MgO matter flux, though the proportioning of rhombspar possibly improve with the stabilized sinter chemical ingredients, the integral body of flux reduces with addition of amount, and this meets the thought of fine fodder and minimizing.
Description of drawings
Fig. 1 is the preparing method's with addition of a paigeite agglomerate of the present invention process flow sheet.
Fig. 2 substitutes the principle schematic of local powder (or Australia's powder) and rhombspar for expression paigeite of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is made further detailed description:
As shown in the figure, agglomerate preparation technology distance of the present invention roughly is divided into: raw material outfit-mixing-granulation-cloth-igniting-sintering-fragmentation-cooling-agglomerate index detection etc., and its concrete operations step is following:
1) raw material is equipped with: from paigeite proportioning 8-12%, and unslaked lime 4.5-5.5%, rhombspar 1-3%, Wingdale 5-7%, coke powder 4.0-5.0%; The basicity CaO/SiO of this agglomerate simultaneously
2=1.8-2.0, TFe content are 55-58%, and MgO content is 1.9-2.3%, and the feed composition of choosing a kind of concrete numerical value in the scope of FeO content 6.0-7.5% is subsequent use;
2) mix: selected material component is transported in drum mixer, adds an amount of moistening material of moisture, the water distribution quantity of raw material is controlled between 7 ± 0.5%, and makes raw materials mix even;
3) granulate: the raw material that mixes is transported in the secondary drum mixer granulates, time 2-3min granulates;
4) cloth: the feed particles after will granulating evenly dispenses on the sintering pallet, and the gauge control that makes sinter bed is in the scope of 500-800mm;
5) igniting: control sinter machine ignition temperature be 950-1200 ℃, ignition time 1-3min, the igniting negative pressure is 5000-7000Pa;
6) sintering: after ignition of sintering process finished, the coke powder in the raw material took fire, and control sintering negative pressure is 7000-12000Pa;
7) cooling: adopt cooling or the outer cooling mode of machine on any machine, the temperature of agglomerate is reduced to below 200 ℃;
8) screening: adopting sieve aperture is that the vibratory screening apparatus of the 4.5-6mm particle after to processing under cooling sieves, and screen underflow is a sinter return fine, and screen overflow is the finished product agglomerate.
9) the agglomerate index detects: size composition, barrate strength to agglomerate detect and analyze.
According to above-mentioned technical process, the present invention has accomplished the prepared in laboratory of agglomerate, and wherein each item specific targets of agglomerate are participated in table 1 to table 6.
Table 1 and 2 has been listed the chemical ingredients and the proportioning of ferric charge, flux and coke powder respectively.2# and 3# are expression two schemes of the present invention in the table.
Table 3 is the sintering cup test result.4 are respectively the size composition and the chemical ingredients result of agglomerate with table 5.
Table 6 uses the comparison of flux ratio for the scenarios agglomerate.
Table 1
| Title | TFe | SiO 2 | Al 2O 3 | CaO | MgO | FeO | Scaling loss |
| Australia powder A | 62.00 | 4.52 | 2.40 | 0.26 | 0.18 | 0.86 | 4.58 |
| Australia powder B | 58.00 | 5.35 | 1.95 | 1.14 | 0.30 | 0.82 | 10.38 |
| Brazil powder C | 66.00 | 1.78 | 1.33 | 0.12 | 0.01 | 0.57 | 3.38 |
| Brazil powder D | 64.05 | 3.44 | 1.53 | 0.02 | 0.02 | 0.50 | 2.50 |
| Local powder E | 66.66 | 6.03 | 0.43 | 0.35 | 0.19 | 24.29 | -1.80 |
| Ferro-boron breeze F | 57.65 | 4.16 | 0.23 | 1.33 | 7.33 | 25.14 | 2.22 |
Table 2
Annotate: the iron charge proportioning is 100%, and flux and coke powder are for joining outward.
Table 3
Table 4
| Test number | ＞40mm | 40-25mm | 25-16mm | 16-10mm | 10-5mm | ＜5mm |
| Benchmark | 21.94 | 21.07 | 6.28 | 15.73 | 14.38 | 20.59 |
| 1# | 23.91 | 19.55 | 6.54 | 15.33 | 15.19 | 19.48 |
| 2# | 23.71 | 18.69 | 6.74 | 16.56 | 16.15 | 18.14 |
| 3# | 23.82 | 18.83 | 6.48 | 15.59 | 16.67 | 18.62 |
Table 5
| Test number | TFe | FeO | CaO | SiO2 | MgO | Al2O3 | R |
| Benchmark | 56.49 | 6.54 | 10.02 | 5.13 | 2.17 | 1.86 | 1.95 |
| 1# | 56.51 | 6.39 | 9.89 | 5.07 | 2.18 | 1.86 | 1.95 |
| 2# | 56.54 | 6.54 | 9.77 | 5.01 | 2.16 | 1.86 | 1.95 |
| 3# | 56.39 | 6.90 | 9.87 | 5.06 | 2.19 | 1.76 | 1.95 |
Table 6
| Test number | Benchmark | 1# | 2# | 3# |
| Flux is with addition of amount | 15.4 | 14.6 | 13.75 | 14.05 |
| Flux reduces usage quantity | 0 | 0.8 | 1.65 | 1.35 |
Visible by table 3, with addition of the ferro-boron breeze, when reducing the ratio of local powder or Australia's powder, reduce the proportioning of rhombspar, the yield rate of agglomerate, tumbler index and utilization coefficient etc. all less than worsening, make moderate progress on the contrary.
Visible by table 4 and table 5, the size composition of 2# and 3# agglomerate and chemical ingredients are all less than worsening.
Visible by table 6, with addition of the ferro-boron breeze, when reducing the ratio of local powder or Australia's powder, reduce the proportioning of rhombspar, finally make agglomerate flux always descend to some extent with addition of amount.Total proportioning of flux has reduced 10%.
See on the whole; Use the lower paigeite of price to substitute local powder or Australia fine powder, reduced simultaneously MgO matter flux with addition of amount, finally when having realized that low-quality resources effective is utilized; Make the integral body of flux reduce, met the thought of fine fodder and minimizing with addition of amount.
Claims (1)
1. use the method for ferro-boron breeze in the sintering, it is characterized in that the technical parameter of controlling in this method is following:
(1) raw material is equipped with: use the paigeite of 8-12% in the iron-bearing material, unslaked lime 4.5-5.5%, rhombspar 1-3%, Wingdale 5-7%, coke powder 4.0-5.0%;
(2) mix: selected material component is transported in drum mixer, adds an amount of moistening material of moisture, the water distribution quantity of raw material is controlled between 6.5～7.5%, and makes raw materials mix even;
(3) granulate: the raw material that mixes is transported in the secondary drum mixer granulates, time 2-3min granulates;
(4) cloth: the feed particles after will granulating evenly dispenses on the sintering pallet, and the gauge control that makes sinter bed is in the scope of 500-800mm;
(5) igniting: control sinter machine ignition temperature be 950-1200 ℃, ignition time 1-3min, the igniting negative pressure is 5000-7000Pa;
(6) sintering: after ignition of sintering process finished, the coke powder in the raw material took fire, and control sintering negative pressure is 7000-12000Pa;
(7) cooling: adopt cooling or the outer cooling mode of machine on any machine, the temperature of agglomerate is reduced to below 200 ℃;
(8) screening: adopting sieve aperture is that the vibratory screening apparatus of the 4.5-6mm particle after to processing under cooling sieves, and screen underflow is a sinter return fine, and screen overflow is the finished product agglomerate;
(9) the agglomerate index detects, the basicity CaO/SiO of this agglomerate
2=1.8-2.0, TFe content are 55-58%, and MgO content is 1.9-2.3%, and FeO content is 6.0-7.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100912988A CN102181630B (en) | 2011-04-12 | 2011-04-12 | Method for using paigeite powder in sintering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100912988A CN102181630B (en) | 2011-04-12 | 2011-04-12 | Method for using paigeite powder in sintering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102181630A CN102181630A (en) | 2011-09-14 |
| CN102181630B true CN102181630B (en) | 2012-08-01 |
Family
ID=44567916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100912988A Active CN102181630B (en) | 2011-04-12 | 2011-04-12 | Method for using paigeite powder in sintering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102181630B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572043B (en) * | 2012-07-25 | 2016-12-07 | 上海梅山钢铁股份有限公司 | The production method of low basicity sinter |
| CN102816924A (en) * | 2012-09-25 | 2012-12-12 | 鞍钢股份有限公司 | Ore blending method for improving heat-state intensity index of sintering ore |
| CN103451418B (en) * | 2013-09-07 | 2015-11-18 | 鞍钢股份有限公司 | A kind of production method of agglomerate |
| CN108070713B (en) * | 2016-11-10 | 2020-03-27 | 宝山钢铁股份有限公司 | Iron ore sintering method using light-burned magnesium balls |
| CN107365907B (en) * | 2017-06-27 | 2019-01-11 | 西安建筑科技大学 | A method of improving iron ore sintering mine low temperature reduction degradation |
| CN107459341A (en) * | 2017-07-18 | 2017-12-12 | 海城利尔麦格西塔材料有限公司 | A kind of magnesia carbon brick and production method by the use of paigeite as additive |
| CN109439820A (en) * | 2018-11-29 | 2019-03-08 | 安徽工业大学 | A kind of blast furnace process raw material and its smelting process |
| CN112662867A (en) * | 2020-12-11 | 2021-04-16 | 四川德胜集团钒钛有限公司 | Sintering method for recycling steel slag |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPR678301A0 (en) * | 2001-08-02 | 2001-08-23 | Commonwealth Scientific And Industrial Research Organisation | Iron ore briquetting |
| CN1325666C (en) * | 2002-12-21 | 2007-07-11 | Posco公司 | An apparatus for manufacturing molten irons by hot compacting fine direct reduced irons and calcined additives and method using the same |
| KR101036646B1 (en) * | 2004-07-16 | 2011-05-24 | 주식회사 포스코 | An apparatus for manufacturing compacted irons of reduced materials comprising fine direct reduced irons and an apparatus for manufacturing molten irons using the same |
| KR101036640B1 (en) * | 2004-07-12 | 2011-05-24 | 주식회사 포스코 | An apparatus for manufacturing compacted irons of reduced materials comprising fine direct reduced irons and an apparatus for manufacturing molten irons using the same |
| KR101036638B1 (en) * | 2004-07-12 | 2011-05-24 | 주식회사 포스코 | An apparatus for manufacturing compacted irons of reduced materials comprising fine direct reduced irons and an apparatus for manufacturing molten irons using the same |
-
2011
- 2011-04-12 CN CN2011100912988A patent/CN102181630B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102181630A (en) | 2011-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102181630B (en) | Method for using paigeite powder in sintering | |
| CN102127636B (en) | Method for preparing low-SiO2 high-performance sinter ore | |
| CN100465306C (en) | Sintered ore capable of improving viscosity of blast furnace slag and process for preparing same | |
| CN101294243B (en) | Pelletisation process for iron ore concentrate sintered mix | |
| CN101928824B (en) | Sinter production method for reducing sintering solid burnup and enhancing intensity | |
| CN102102146B (en) | Method for sintering high-aluminum refractory limonite | |
| CN105002352B (en) | A kind of preparation method of high performance pellet binder | |
| CN102586589B (en) | Method for applying Bayan Obo ore ultra-fine iron powder in sintering | |
| CN101701289A (en) | Method for intensifying limonite sintering | |
| CN102936653B (en) | Method for reducing high-density metallized pellet | |
| CN103614548B (en) | Method for producing sinter from hematite concentrate powder | |
| CN103374635B (en) | Blast furnace slag recycling method | |
| CN103667686A (en) | Sintering mixture and application thereof | |
| CN104529312A (en) | High-admixing amount high-strength nickel slag brick and preparation method of high-admixing amount high-strength nickel slag brick | |
| CN102978384A (en) | Method for using steel slags during sintering | |
| CN103924063A (en) | Method for sintering all-vanadium titanium magnetite concentrate | |
| CN101921911A (en) | Pellet binder and preparation method thereof | |
| CN103725875B (en) | High-performance pellet | |
| CN103572043B (en) | The production method of low basicity sinter | |
| CN103710536A (en) | Preparation method of pellet binder with high performance | |
| CN101994002B (en) | Method for sintering ore blending of Jianshan concentrate fines and limonite | |
| CN104120207A (en) | Method for producing cast iron by ore blending of tin iron tailing concentrate and poor mixed ore with high harmful elements | |
| CN101660064B (en) | Technique for preparing nickel-iron alloy | |
| CN103146914B (en) | Cold-pressed high-strength fluorite pellet binder and use method thereof | |
| CN109608065A (en) | A kind of compound steel-making slag powder of modification and its preparation method and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee before: Capital Iron & Steel General Company |