CN100485054C - Sintering ore-proportioning method for different kinds of iron material mostly comprising hematite concentrate - Google Patents
Sintering ore-proportioning method for different kinds of iron material mostly comprising hematite concentrate Download PDFInfo
- Publication number
- CN100485054C CN100485054C CNB2005100478300A CN200510047830A CN100485054C CN 100485054 C CN100485054 C CN 100485054C CN B2005100478300 A CNB2005100478300 A CN B2005100478300A CN 200510047830 A CN200510047830 A CN 200510047830A CN 100485054 C CN100485054 C CN 100485054C
- Authority
- CN
- China
- Prior art keywords
- iron
- magnetite
- iron ore
- concentrate
- feo
- 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
Abstract
The invention discloses a sintering allocating method of multiple ferric materials based on hematite as host, which is characterized by the following: setting the rate of refined hematite at 40-70% with the proportion of other high-FeO ferric material at 30-60%; setting the alkaline degree of sintered ore at 1.5-2.5 with sintered FeO not less than 9% in the mixed material; improving sintering quality and production; rationalizing the sintered ore structure.
Description
Technical field
The invention belongs to the agglomeration technology of iron-smelting raw material agglomerate, relate in particular to the ore-proportioning method in the iron ore sintering process.
Background technology
Along with China's rapid development of economy, domestic demand to iron ore is increasing.In the last few years, iron ore import first mate's degree year after year increased, and China's imported iron ore stone reached 2.08 hundred million tons in 2004.Report discloses according to the study, and easily choosing, that sintering character the is good resource of magnetite of China is faced with the situation of worsening shortages, and the lean hematite resource of a large amount of sintering character differences is still waiting development and use.
The major ingredient of magnetite is Fe
3O
4, during sintering, under the also unformed situation of liquid phase, just can moulding adhered to one another.Because exothermic oxidation reaction takes place in magnetite its suboxide in sintering process easily.1 kilogram of FeO is oxidized to Fe
2O
3Can emit the heat of 1787.76 KJ (kilojoule), the FeO content of general magnetite is all about 25% or higher.So during with the magnetite sintering, can fuel saving.It is calculated that with FeO be 25% magnetite and to contain FeO be 0.5% rhombohedral iron ore, produce when to contain FeO be 13% agglomerate that its solid-fuelled unit consumption approximately differs standard coal/ton agglomerate of 25 kilograms.Magnetite has also that volatile matter is few, the weightless loss of sintering less, shrink little, the softening low characteristic of temperature of fusion, be easy to generate liquid phase, therefore, help sinter molding.Rhombohedral iron ore (Fe
2O
3) claim red ore deposit again, its sintering character and magnetite have some general character, but it is higher that rhombohedral iron ore begins softening temperature, to reach high like this temperature equably in each one of the bed of material, certain difficulty is arranged, magnetite just can react to each other with other gangue and generate low-melting mineral under lower temperature, and rhombohedral iron ore then needs higher temperature condition just can accomplish.So during the rhombohedral iron ore sintering, it is big that solid-fuelled consumption is wanted.In order to reach the purpose that increases liquid phase, usually when joining the ore deposit, increase firing rate, tend to occur the superfusion phenomenon like this, generate that matter is crisp, the hole big, intensity difference, the bad agglomerate of reductibility, therefore rhombohedral iron ore is poorer than the sintering character of magnetite, and the sintering character of red iron ore concentrate is then poorer.
The purpose of joining the ore deposit be for the Chemical Composition that makes agglomerate and material properties stable, conform with the requirement of blast furnace ironmaking, and make sintered material have enough ventilation properties, to obtain higher productivity of sinter, so must prepare burden accurately to iron-bearing material, flux and the fuel etc. of various different components.Existing distribution only considers whether the grade of iron charge satisfies the agglomerate demand, various iron charges are allocated according to a certain percentage produce, and do not consider the kind of iron ore, the complementation of sintering characteristic, do not consider that FeO is to the influence of sintering process and the mineral composition of finished product agglomerate in the iron charge yet.If by existing method batching, the ratio of rhombohedral iron ore is high more in the iron charge, the fuel increase is many more, and productivity of sinter is just low more, energy consumption is high more, and sinter strength is poor more, reduction degree is low more.When particularly the red iron ore concentrate after reverse flotation is handled being carried out sintering, the problems referred to above are more outstanding.
Summary of the invention
The object of the present invention is to provide and a kind ofly can satisfy sinter strength and the reduction degree requirement can utilize red iron ore concentrate to carry out sintering again as much as possible, is the Iron Ore Matching in Sintering method of major-minor many kinds iron charge with the high iron charge of other FeO content with red iron ore concentrate.
The present invention is achieved in that at first that based on the Iron Ore Matching in Sintering method of many kinds iron charge of red iron ore concentrate the Chemical Composition to red iron ore concentrate and other iron charge detects, calculate the ratio of various iron charges more on request, the ratio that it is characterized in that described red iron ore concentrate is 40%～70%, the ratio of other iron charge of more than one high FeO content is 30%～60%, when the basicity of agglomerate is 1.5～2.5, the FeO content in the sinter mixture is controlled at 〉=and 9%.
FeO content＜10% of red iron ore concentrate of the present invention, other iron charge is magnetite and Iron And Steel Industry waste material, FeO content 〉=16% of described magnetite, wherein FeO content≤25% is called the A magnetite, its ratio is 0%～60%, FeO content〉25% be called the B magnetite, its ratio is 0%～60%, FeO content 〉=40% of described Iron And Steel Industry waste material, its ratio are 0%～30%.Described magnetite can be magnet rich ore powder or magnetite concentrate, and described Iron And Steel Industry waste material can be iron scale, converter ion dust mud contaning, blast-furnace dust or slag.
The key of Iron Ore Matching in Sintering method of the present invention is to account under the condition of iron charge proportioning 40%～70% at red iron ore concentrate, by other iron charge with addition of a certain amount of high FeO content, as magnetite or Iron And Steel Industry waste material, FeO content in the sinter mixture is controlled at 〉=9%, optimize the iron charge structure thereby reach, improve the purpose of red iron ore concentrate sintered characteristic.This be because:
1, studies have shown that red iron ore concentrate and the magnetite concentrate comparison of sintering with amount, the fuel consumption 9kg/t that will raise, because FeO content ≯ 10% in the rhombohedral iron ore, generally all below 3%.Rhombohedral iron ore stone sintering mainly is to reduce oxidation reaction process again and again, generates with Fe
3O
4And Fe
2O
3It is main mineral composition.The CO that fuel generates in the sintering process is at first with rhombohedral iron ore (Fe
2O
3) reduction reaction a: Fe
2O
3+ CO → Fe
3O
4+ CO
2-37.14KJ/mol has so just consumed a part of fuel, Fe
2O
3Mineral content is higher, and the fuel of consumption just the more.After allocating the high iron charges such as magnetite of FeO content into during the red iron ore concentrate of sintering, make in the compound FeO content bring up to 〉=9%, not only satisfy FeO content in the agglomerate, can also utilize the oxidizing reaction liberated heat (FeO+O of unnecessary iron protoxide in the high-temp combustion layer
2→ Fe
2O
3+ 260KJ/mol) improve the chemical heat of sinter bed, and then reduce fuel consumption.Solve sintering temperature height in the red iron ore concentrate sintered process, burning property is poor, energy consumption is high problem with this.
2, by iron charges such as magnetite, make FeO content 〉=9% in the compound, can make gangue SiO in the raw material with addition of a certain amount of high FeO content
2Generate a small amount of low temperature (2FeO.SiO with its reaction
21177 ℃ of-FeO system fusing points, 2FeO.SiO
2-SiO
21178 ℃ of system fusing points) liquid phase, because the generation of a small amount of low temperature liquid phase, mass transfer, heat transfer condition have been improved, reduce the temperature of fusion of mixture, thereby reduce the sintering temperature of red iron ore concentrate, improve the sintering character of compound, made compound under the low-temperature sintering condition, produce the fixed not molten mineral of enough amount of liquid phase, improved red iron ore concentrate sintered productivity.Simultaneously because the SiO that dissociates in the liquid phase
2Minimizing and the reduction of the sintering temperature growing amount that suppresses Dicalcium Phosphate (Feed Grade), agglomerate mesosilicic acid two calcium contentss are reduced, the high Well-recovered calcium ferrite amount of intensity increases, and forms the rational agglomerate of mineral composition, and the intensity of agglomerate is improved.
3, along with the rising of the FeO content in the sinter mixture, the coal blending amount reduces relatively, reduced the oxygen-consumption when coal-fired, this helps realizing red iron ore concentrate sintering under cryogenic oxygen voltinism atmospheric condition, created necessary temperature, atmosphere and material conditions for the formation of calcium ferrite in the red iron ore concentrate sintered process, made mineral composition in the agglomerate based on intensity height, Well-recovered calcium ferrite.Thereby make the content of agglomerate calcium ferrite improve 10%～15%, reach 30%～35%, reductibility is brought up to more than 80%.
The ratio that how much depends on red iron ore concentrate of the kind of other iron charge and ratio and the content of FeO thereof in the Iron Ore Matching in Sintering method of the present invention, and the basicity requirement of agglomerate.Sinter basicity requires high more, flux ratio in the sinter mixture is big more, satisfy FeO content 〉=9% in the sinter mixture, should improve the FeO content that mixes in the iron charge relatively, how much what this just need be according to FeO content in the iron charge selects different iron charges and proportioning thereof.If the FeO content in the sinter mixture is too low, the utilization coefficient of sinter machine will reduce, and the metallurgical performance of agglomerate is just poor.
The present invention is of great immediate significance and far-reaching strategic importance to the energy-saving and cost-reducing etc. of the magnetite of reasonable configuration using China and rhombohedral iron ore resource and metallurgy industry.Adopt Iron Ore Matching in Sintering method of the present invention can improve the sintering characteristic of red iron ore concentrate greatly, make productivity of sintering machine improve 6%～8%, the FeO that makes agglomerate by 12%～13% drop to below 9%, reduction degree reaches 80%, in the agglomerate＜5mm has partly descended 3%, the intensity of agglomerate increases, solid fuel consumption decline 5kg/t～6kg/t, improve and improved the quality and the output of high basicity sinter, the agglomerate high temperature metallurgical properties also is greatly improved, and makes the mineral structure of agglomerate more reasonable.Adopt the performance of the agglomerate that this method produces to satisfy the requirement of blast-furnace smelting, can also improve the capacity factor of a blast furnace, improve output, reduce coke ratio.In addition, allocate a certain amount of A, B magnetite and Iron And Steel Industry waste material into, also solved the problem of, moisture higher " mud " that causes meticulous and " gluing " because of red iron ore concentrate, improved sinter mixture mixing, improved granulating efficiency, the sintered material ventilation property is improved.Also made full use of the Iron And Steel Industry waste material simultaneously.
Embodiment
The present invention is further described by the following embodiment.
At first determine other used iron charge, the embodiment of the invention adopts A magnetite concentrate (A magnetite a kind of), B magnetite concentrate (B magnetite a kind of) and iron scale, and the Chemical Composition to red iron ore concentrate and other iron charge detects then.The chemical ingredients and the scaling loss of each iron charge of measuring see Table 1.In order more problem to be described, it is example that the embodiment of the invention is selected fine size, red iron ore concentrate that FeO content is low for use.
The chemical ingredients of table 1 iron charge (%)
| Project | TFe | FeO | SiO 2 | CaO | MgO | Scaling loss |
| Red iron ore concentrate | 64.70 | 1.35 | 6.15 | 0.15 | 0.30 | 2.01 |
| The A magnetite concentrate | 68.26 | 21.01 | 3.50 | 0.15 | 0.30 | -1.62 |
| The B magnetite concentrate | 66.17 | 28.65 | 7.00 | 0.30 | 0.35 | -2.32 |
| Iron scale | 74.48 | 70.58 | 0.41 | 0.18 | 1.3 | 1.32 |
According to the FeO content (red iron ore concentrate 1.35%, A magnetite concentrate 21.01%, B magnetite concentrate 28.65%, iron scale 70.58%) and the resource situation of each iron charge in the table 1, calculate the ratio of various iron charges on request.Embodiment is made as 2.0 with the basicity of agglomerate, and red iron ore concentrate ratio is respectively under 40%, 50%, 60% and 70% the situation joins the ore deposit, and the variation of FeO content sees Table 2 in the iron charge proportioning of each group and the compound.
The proportioning of the content of FeO and iron charge in table 2 compound
| Example 1 | Example 2 | Example 3 | Example 4 | |
| Red iron ore concentrate proportioning/% | 40 | 50 | 60 | 70 |
| A magnetite concentrate proportioning/% | 20 | 20 | 15 | 10 |
| B magnetite concentrate proportioning/% | 40 | 30 | 20 | 12 |
| Iron scale proportioning/% | 0 | 0 | 5 | 8 |
| Mix iron charge FeO/% | 16.20 | 13.47 | 13.22 | 12.13 |
| Sinter mixture FeO/% | 12.15 | 10.10 | 9.92 | 9.10 |
Table 2 provides 4 groups of different proportionings, comprises the content of FeO in the content that mixes FeO in the iron charge and the sinter mixture.The kind of other iron charge that is adopted among the embodiment is all two or more, mainly be to consider, also need to consider factors such as granulating efficiency certainly for the effective utilization of resource of magnetite, because of the granularity of red iron ore concentrate very thin,-30 μ m parts〉70%, median size less than 20 μ m.With regard to the proportioning of 1 group of example, the ratio of B magnetite concentrate can be adjusted into 60% fully, and the A magnetite concentrate is 0.Equally, if the FeO content of red iron ore concentrate is higher, also the ratio of A magnetite concentrate can be adjusted into 60%, as long as can satisfy content 〉=9% of FeO in the sinter mixture.Consumption as red iron ore concentrate is too high, and FeO content is not less than 9.0% in the compound in order to make, and can join an amount of iron scale of people, shown in 4 groups of the example in the table 23 and examples.Certainly, if the resource abundance of Iron And Steel Industry waste material also can suitably improve the usage quantity of red iron ore concentrate.
The relation of FeO content in table 3 utilization coefficient, tumbler index and the compound
| Example 1 | Example 2 | Example 3 | Example 4 | |
| FeO/% in the compound | 12.15 | 10.1 | 9.92 | 9.1 |
| Utilization coefficient/t/m 2.h | 2.159 | 1.878 | 1.853 | 1.741 |
| Tumbler index/% | 61.9 | 59.2 | 58.9 | 57.9 |
| FeO/% in the agglomerate | 7.75 | 6.2 | 7.5 | 8.85 |
Table 3 provides in the compound FeO content to the influence of red iron ore concentrate sintered index.The test-results of doing by his-and-hers watches 2 proportionings shows: when sinter basicity one timing, along with FeO content in the sinter mixture is elevated at 12.15% o'clock by 9.10%, the agglomerating utilization coefficient is also thereupon by 1.741t/m
2H has risen to 2.159t/m
2H, the barrate strength of agglomerate have also brought up to 61.9% by 57.9%, and be as shown in table 3.
The reductibility of table 4 agglomerate and reduction degradation index
The mineral composition of table 5 agglomerate (the area percentage composition, %)
| Rhombohedral iron ore | Magnetite | Calcium ferrite | Dicalcium Phosphate (Feed Grade) | Glassy phase | Other |
| 25～30 | 30～35 | 25～30 | 3～5 | 0.5～2 | 0～1 |
Adopt the metallurgical performance of the agglomerate of embodiment of the invention production to see Table 4.As shown in Table 4,500 ℃ of low temperature reduction degradation RDI
+ 3 15mmBe higher than 80%, 900 ℃ of reduction degree and also reach more than 80%, metallurgical performance is good.This is to be determined by the microtexture of agglomerate and mineral composition.The texture ratio of agglomerate is more even.As can be seen from Table 5, the bonding of agglomerate reaches more than 25% based on the needle-like calcium ferrite.Magnetite mainly is the corrode structure that interweaves by calcium ferrite, a spot of glassiness gluing.Adopt the inventive method to improve the sintering characteristic of red iron ore concentrate sintered temperature height, coking property difference, also solved batching operation and the mixing that red iron ore concentrate " mud " and " gluing " bring, the technical problem of making all many-sides of ball simultaneously, improved bed permeability.Reduced firing rate, improved oxidizing atmosphere, having obtained is the agglomerate of main bonding phase with the calcium ferrite.
Claims (4)
1. Iron Ore Matching in Sintering method based on many kinds iron charge of red iron ore concentrate, after the Chemical Composition of red iron ore concentrate and other iron charge detected, calculate the ratio of various iron charges on request, the ratio that it is characterized in that described red iron ore concentrate is 40%～70%, the ratio of other iron charge of more than one high FeO content is 30%～60%, when the basicity of agglomerate is 1.5～2.5, the FeO content in the sinter mixture is controlled at 〉=and 9%.
2. Iron Ore Matching in Sintering method according to claim 1, FeO content＜10% that it is characterized in that described red iron ore concentrate, other iron charge is magnetite and Iron And Steel Industry waste material, FeO content 〉=16% of described magnetite, wherein FeO content≤25% is called the A magnetite, FeO content〉25% be called B magnetite, FeO content 〉=40% of described Iron And Steel Industry waste material.
3. Iron Ore Matching in Sintering method according to claim 2 is characterized in that described magnetite is magnet rich ore powder or magnetite concentrate, and described Iron And Steel Industry waste material is iron scale, converter ion dust mud contaning, blast-furnace dust or slag.
4. according to claim 2 or 3 described Iron Ore Matching in Sintering methods, the ratio that it is characterized in that described A magnetite is 0%～60%, and the ratio of described B magnetite is 0%～60%, and the ratio of Iron And Steel Industry waste material is 0%～30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100478300A CN100485054C (en) | 2005-11-24 | 2005-11-24 | Sintering ore-proportioning method for different kinds of iron material mostly comprising hematite concentrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100478300A CN100485054C (en) | 2005-11-24 | 2005-11-24 | Sintering ore-proportioning method for different kinds of iron material mostly comprising hematite concentrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1970800A CN1970800A (en) | 2007-05-30 |
| CN100485054C true CN100485054C (en) | 2009-05-06 |
Family
ID=38111826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100478300A Active CN100485054C (en) | 2005-11-24 | 2005-11-24 | Sintering ore-proportioning method for different kinds of iron material mostly comprising hematite concentrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100485054C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103045856A (en) * | 2012-12-28 | 2013-04-17 | 柳州钢铁股份有限公司 | Production method for sintering industrial solid wastes to produce blast-furnace smelting sintered ore |
| CN104419821A (en) * | 2013-09-05 | 2015-03-18 | 鞍钢股份有限公司 | Method for producing sintered ore by using waste acid mud |
| CN105063344B (en) * | 2015-08-20 | 2017-06-13 | 山西太钢不锈钢股份有限公司 | A kind of method of the sinter quality for improving the production of fine fraction Iron Ore Powder |
| CN109781927A (en) * | 2019-01-07 | 2019-05-21 | 武汉钢铁有限公司 | The method for calculating sinter ore deposit consumption |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3984229A (en) * | 1970-04-20 | 1976-10-05 | Boliden Aktiebolag | Method for producing coarse powder, hardened iron oxide material from finely divided raw material substantially consisting of hematite and/or magnetite |
-
2005
- 2005-11-24 CN CNB2005100478300A patent/CN100485054C/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3984229A (en) * | 1970-04-20 | 1976-10-05 | Boliden Aktiebolag | Method for producing coarse powder, hardened iron oxide material from finely divided raw material substantially consisting of hematite and/or magnetite |
Non-Patent Citations (4)
| Title |
|---|
| 关于赤浮精矿烧结燃耗的探讨. 陈平.中国矿业，第9卷第49期. 2000 |
| 关于赤浮精矿烧结燃耗的探讨. 陈平.中国矿业，第9卷第49期. 2000 * |
| 浮选赤铁精矿烧结节能降耗的实践. 陈平，王常秋.烧结球团，第29卷第5期. 2004 |
| 浮选赤铁精矿烧结节能降耗的实践. 陈平，王常秋.烧结球团，第29卷第5期. 2004 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1970800A (en) | 2007-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100507013C (en) | Method for directly producing ferrochromium from chrome ore powder and coal | |
| CN102206744B (en) | Method for granulating sinter mixture | |
| CN101775451A (en) | Blast-furnace smelting method for vanadium titano-magnetite | |
| CN100485054C (en) | Sintering ore-proportioning method for different kinds of iron material mostly comprising hematite concentrate | |
| CN109652643B (en) | High-quality sinter for COREX smelting reduction iron-making process and preparation method thereof | |
| CN102220440A (en) | Vanadium-titanium magnetite blast furnace smelting method capable of improving vanadium yield | |
| CN103436694A (en) | Method for preparing chrome ore pellets | |
| CN101104873A (en) | Method for fusing reducing iron by employing iron ore hot pressing carbon-containing agglomerate | |
| CN103451421B (en) | A kind of preparation method of blast furnace gas mud pre-reduced pellet | |
| CN102936653A (en) | Method for reducing high-density metallized pellet | |
| CN103614548B (en) | Method for producing sinter from hematite concentrate powder | |
| CN102653804A (en) | Method for producing granular iron by magnetically roasting and reducing low-quality limonite with rotary hearth furnace | |
| CN102373332A (en) | Ultra-micro magnesium carbonate pellet additive, preparation method thereof, and application thereof | |
| CN103710536A (en) | Preparation method of pellet binder with high performance | |
| CN103725875B (en) | High-performance pellet | |
| CN110079665A (en) | A kind of preparation method of the high-carbon metallized pellet for electric furnace | |
| CN104313229A (en) | Method for manufacturing high-phosphorus iron by using shaft furnace to directly reduce high phosphorus ore | |
| CN104073630B (en) | A kind of waste plastics is iron-based carbonaceous pelletizing of carbon source and preparation method thereof | |
| CN101660064B (en) | Technique for preparing nickel-iron alloy | |
| CN103757165B (en) | A kind of high-iron bauxite blast-furnace smelting has valency constituent element method of comprehensive utilization | |
| CN103031430B (en) | Method for making sintering bed charge by returning mine at high mixture ratio | |
| CN101705353B (en) | Multi-functional composite additive for intensifying direct reduction of low-grade superfine hematite | |
| CN107142120A (en) | A kind of high response coke and preparation method thereof | |
| CN111154934A (en) | Furnace burden structure ratio for adjusting blast furnace slag MgO | |
| CN85100645A (en) | Double-sphere sintering technology |
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 | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Patentee after: Anshan Iron & Steel Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Angang Group Mine Company Patentee before: Anshan Iron & Steel Co., Ltd. |