CN104894367A - Sintering technology for acidic pellet ore and alkaline material mixed ultra-thick material layer - Google Patents

Sintering technology for acidic pellet ore and alkaline material mixed ultra-thick material layer Download PDF

Info

Publication number
CN104894367A
CN104894367A CN201410082828.6A CN201410082828A CN104894367A CN 104894367 A CN104894367 A CN 104894367A CN 201410082828 A CN201410082828 A CN 201410082828A CN 104894367 A CN104894367 A CN 104894367A
Authority
CN
China
Prior art keywords
sintering
pellet ore
acidic pellet
ball
green
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.)
Granted
Application number
CN201410082828.6A
Other languages
Chinese (zh)
Other versions
CN104894367B (en
Inventor
吕庆
吴玮楠
冯帅
王瑞哲
孙艳芹
刘小杰
万新宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
North China University of Science and Technology
Original Assignee
吕庆
吴玮楠
冯帅
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 吕庆, 吴玮楠, 冯帅 filed Critical 吕庆
Priority to CN201410082828.6A priority Critical patent/CN104894367B/en
Publication of CN104894367A publication Critical patent/CN104894367A/en
Application granted granted Critical
Publication of CN104894367B publication Critical patent/CN104894367B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention provides a novel sintering technology for an acidic pellet and alkaline material mixed ultra-thick material layer. The sintering technology contains the following components: 3%-8% of an acidic pellet ore (green ball) with the particle size of 5-8 mm, 10%-15% of an acidic pellet ore (green ball) with the particle size of 8-10 mm, 15%-25% of an acidic pellet ore (green ball) with the particle size of 10-12.5 mm, 2%-5% of an acidic pellet ore (green ball) with the particle size of greater than 12.5 mm, and 50%-70% of an alkaline material (according to the weight percentage). On one hand, the air permeability of a sintered material layer can be improved, the oxidizing atmosphere is strengthened, the thickness of the sintered material layer is increased, and the purposes of improving production and quality and saving energy are achieved; and on the other hand, heat in the sintering process can be fully utilized, a sintered ore with suitable basicity is produced, the production process is shortened, and the production economic benefit is increased. Therefore, the novel acid and alkali mixed ultra-thick material layer sintering technology can be speculated to be capable of improving the air permeability of the material layer, thickening the sintered material layer, strengthening the oxidizing atmosphere and effectively improving the utilization coefficient of a sintering machine, so as to allow sintering production to achieve the purposes of saving energy consumption and improving the sintering quality.

Description

A kind of acidic pellet ore and alkaline material mixing super thick bed of material sintering technology
Technical field
Patent of the present invention relates to a kind of new mixing acidic pellet ore and high alkalinity material and carries out the technology that 1000mm surpasses deep-bed sintering, is particularly useful for steel enterprise sintering field.
Background technology
Within 2012, Chinese iron output reaches more than 700,000,000 ton, and this must need to consume a large amount of iron-bearing material, and present stage, China's overwhelming majority Steel Plant blast furnace was based on high basicity sinter, enters stove burden structure with addition of acidic pellet ore and natural rich ore.Therefore, improve quality of furnace charge, energy-saving and cost-reducing, cost-saving be the most important thing.
Improving constantly and consequent scarcity of raw material with China's iron and steel output, also there are some problems in existing technique for producing raw material and technology: 1) along with grade of sinter raises and SiO 2content reduces, and sinter strength will decline; 2) the lump ore quantity meeting blast-furnace smelting in acid ore deposit can not meet the demands, and blast furnace acidity material is main based on pellet.Pellet is strict to ingredient requirement, and tooling cost is high, causes blast-furnace smelting cost to increase; 3) acid ore deposit, high basicity sinter are respectively charged into blast furnace, make the assimilation process of furnace charge in blast furnace slow, the strengthening smelting of unfavorable blast furnace and the reduction of cost; 4) sinter machine output is high, relatively wide in range to ingredient requirement, and cost is low, but energy consumption high pollution is serious; 5) sinter, each tool advantage of pelletizing, but mineralization machanism, sinter process are different, and large-lot producer generally has sintering, pelletizing two overlaps technical process, cause that enterprise investment is high, occupation of land is many, and organization of production is difficult, and production cost is high; 6) deep-bed sintering is increase sinter machine output, reduces costs the effective means with decreasing pollution.But the sintered material of same nature has identical melting property, along with the increase of bed thickness. accumulation of heat is strengthened. material layer lower part heat surplus. compound is superfused. and zone of combustion broadens. and ventilation property worsens, and causes sintering velocity to reduce, production declining.Therefore, current sintering process is difficult to realize the super thick bed of material (>=1000mm) sintering.
The invention provides the novel process of a kind of acid pellet, the super deep-bed sintering of alkaline material mixing.The core of this technique utilizes existing sintering, pellet feed process, processing units and technique, carries out the mixing of acid pellet, high-basicity sintering material before entering sinter machine, and sinter machine completes the roasting agglomeration process of acid ball and high-basicity sintering material.This technique has improves permeability of sintering material bed, improves bed thickness, acidic pellet ore and high basicity sinter are generated simultaneously, shortens Production Flow Chart, increases sinter machine output, reduces costs, saves the advantage such as energy consumption and decreasing pollution.
Summary of the invention
The object of this invention is to provide a kind of novel blast-furnace and enter stove furnace charge production technique.According to the Influential cases of sintering process mixture ventilation to sintering process, the acidic pellet ore (green-ball) of suitable particle size is selected to mix with high-basicity sintering raw material, to improve the seed output and quality of blast furnace feeding furnace charge.
Technical scheme of the present invention is:
The iron-bearing material that this test uses is divided into acid and alkaline two portions, the fine iron breeze that the content that acidic moiety uses granularity to be less than 0.074mm is greater than 70%, and fine iron breeze upper size boundary is no more than 0.2mm, use calcium-base bentonite as binding agent, abundant mixing, add balling disc pelletizing after mixing, add water during pelletizing, get satisfactory acidic pellet ore (green-ball) and test as raw material, basic moiety is by powdered iron ore, flux (unslaked lime and Wingdale), after fuel (coke powder) adds water and once mixes, load drum pelletizer and carry out secondary mixed pelletization, Granulation time is 10 ~ 12min, after granulation completes, acid material is added in alkaline material, use drum pelletizer by acid, alkali two kinds of mixing of materials, mixing time 2min, make the mixing material of total water content about 7.5%, soda acid compound is loaded in the high sintered cup of 1000mm and sinter, it is that the agglomerate of 10 ~ 16mm is as grate-layer material that 2.00kg granularity is housed bottom sintered cup, sintering uses liquefied petroleum gas (LPG) igniting, ignition temperature 1150 DEG C, ignition time is 2min, igniting vacuum cavitations is 7840Pa, down draft sintering, sintering vacuum cavitations is 11760Pa.Get finished product ore deposit after having tested, calculate agglomerate yield rate, carry out sample drum test according to national standard (GB8029-1987); Sample low-temperature reduction disintegration energy and middle temperature reducing property detection (Fig. 1 is shown in by testing apparatus) is carried out by national standard (GB/T13241-1991).
Soda acid mixing super thick bed of material sinter mixture proportioning:
The sintering process compound mechanism of action:
Bed permeability is a very important state parameter, reflects the complexity that sinter bed allows gas to pass through, has close relationship with the structure of the bed of material.The flow condition of gas in sinter bed and Changing Pattern affect the mass transfer of sintering process, heat transfer and physical-chemical reaction, and therefore permeability of sintering material bed determines the complexity that sintering process is carried out smoothly, is the yield and quality important indicator of agglomerate.
It is very difficult that the bed thickness of conventional sintering process is wanted to reach 850mm or even 1000mm, this is mainly because the ventilation property of original sintering process is after zone of combustion reaches the bottom bed of material, due to porosity and auto accumulation heat effect, have impact on the ventilation property of the bed of material, cause bottom bed of material temperature of combustion too high simultaneously, there is superfusion phenomenon, the oxidizing atmosphere of sintering process is weakened, affects the seed output and quality of agglomerate.
New soda acid mixes the ventilation property that sintered material can improve sinter bed to a great extent, strengthen the oxidizing atmosphere in sintering process, the auto accumulation heat effect of sintering can be made full use of simultaneously, reduce the consumption of coke powder, while raising Sintering Operation Index, reach the object of energy-saving and emission-reduction.
Sinter bed structure has a significant impact ventilation property, and its improvement improves bed permeability and has very large effect reduction bed of material air resistance, and determine that the significant parameter of bed structure has the median size d of compound and the porosity ε of the bed of material.
1) in research mixture ventilation process, median size generally adopts weighted harmonic mean value to represent, shown in (1):
Known by testing and calculating, generally improve the granularity of each grade, obviously can improve bed permeability, less materialbeds comminution loss.
2) porosity of the bed of material refers to volume shared by pore and the ratio of cumulative volume shared by the bed of material, can be calculated by formula (2):
ε=1-ρ heap/ ρ very( 2)
Calculated by testing data, the porosity of conventional sintering process compound is about 0.4, and the porosity that soda acid mixes the super thick bed of material sintering technology bed of material is about 0.45 ~ 0.48, and porosity significantly improves.
The people such as E.W.Voice propose sintering permeability index calculation formula (3) on the basis of test:
P = Q F ( h Δp ) n - - - ( 3 )
In formula: the permeability index of the P-bed of material;
Q-by the air quantity of the bed of material, m 3/ min;
F-exhausting area, m 2;
H-bed depth, m;
△ p-negative pressure, Pa.
In formula, n is due to the difference of flow state, and its value is change, and according to the kind of raw materials for sintering and the difference of size composition, n can be determined by test, gets 0.6 in this experiment.
Bed of material pressure change is recorded in process of the test, calculated by formula (3), reach a conclusion, acid, alkali mix the ventilation property that super thick bed of material sintering technology can significantly improve sinter bed, while raising sintering utilization coefficient, strengthen oxidizing atmosphere, make to sinter the calcium ferrite phase that liquid phase can generate high-quality, improve the quality of agglomerate, and, acidic pellet ore in finished product agglomerate also can reach the requirement of blast furnace approach, shortens raw material production operation, improves production efficiency.
Accompanying drawing illustrates:
Fig. 1 sintered cup schematic diagram
Fig. 2 agglutinating test apparatus structure schematic diagram
In figure: 1. burner blower; 2. LPG cyoinders; 3. spent air temperture display instrument; 4. thermopair; 5. sintered cup;
6. ignition temperature display instrument; 7. lighter for ignition; 8. depressimeter; 9.-level tornado dust collector; 10. second cyclone dust extractor; 11. bubble dust collectors; 12. sourdines; 13. vacuum fans
Fig. 3 reduction degradation device schematic diagram
In figure: 1. air compressor, 2. nitrogengas cylinder, 3.CO converter, 4. mixing tank, 5. washing bottle (absorption oxygen), 6. washing bottle (absorbs CO 2), 7. washing bottle (dry air), 8. take-off pipe, 9. under meter, 10. reduction furnace, 11. reaction tubess, 12. electronic balances, 13. waste-gas burning bottles, 14. arithmetical unit, 15. registering instruments, 16. infrared gas analyzers (analytic record CO), 17. infrared gas analyzers (analytic record CO 2), 18. supervisory control desks, 19. temperature controllers
Embodiment
By the following examples, the invention will be further described.
The using method that acid, alkali mix super thick bed of material sintering technology concrete is as follows:
(1) this test uses the powdered iron ore, flux and the fuel that meet sintering and pellet formation standard, and specific chemical composition is in table 1.
Table 1 material chemical component
Table1Chemical composition of raw material
(2) raw material preparation flow is as follows:
1. prepare alkaline material, proportioning is as follows:
2. prepare acidic pellet ore, proportioning is as follows:
Containing vanadium fine powder 95%
Calcium-base bentonite 5%
Weight is by 100%.
3. prepare soda acid mixed sintering raw material, proportioning is as follows:
1. alkaline material 60% prepared in
2. acidic pellet ore 40% prepared in
(3) adopt Fig. 1 testing apparatus to carry out soda acid mixing and fry deep-bed sintering test.During test, first in specification be sintered cup in put into 2.00kg granularity be that the sintering finished ores of 10 ~ 16mm is as grate-layer material, then take 70kg soda acid mixed sintering raw material and put into sintered cup, wherein alkaline material accounts for 50 ~ 70% of total content, granularity 5 ~ 8mm pellet accounts for 5% ~ 10%, granularity 8 ~ 10mm pellet accounts for 5% ~ 10%, granularity 10 ~ 12.5mm pellet accounts for 10% ~ 20%, granularity is greater than 12.5mm pellet and accounts for 5% ~ 10%, use coal gas or liquefied petroleum gas (LPG) igniting, ignition temperature 1150 DEG C, igniting suction pressure 7840Pa, ignition time 2min, down draft sintering is carried out after igniting terminates, sintering negative pressure 11760Pa, sinter and rear sintering finished ores have been detected.
(4) after agglomerate is poured out from sintered cup, sinter cake is placed in 2m height and freely falls to iron plate 3 times, and the square hole sieve of different pore size sieves step by step respectively, produces actual according to holding steel, get be greater than 10mm per-cent as the yield rate of agglomerate, calculation formula is such as formula shown in (4):
In formula: G 1-be greater than the agglomerate weight of 10mm grade, kg;
W-agglomerate gross weight, kg.
Carry out according to (YB/T5166-2005) agglomerate pellet physical strength detection method, sample is the finished product agglomerate 7.5kg being greater than 10mm.Rotary drum used is the 1/4ISO rotary drum of Ф 1000mmx250mm, after the rotational speed 8min of 25r/min, get be greater than 6.3mm per-cent as the tumbler index of agglomerate, get be less than 0.5mm per-cent as the anti-wear index of agglomerate, method of calculation are such as formula shown in (5) and (6).
Tumbler index: T = m 1 m 0 × 100 % - - - ( 5 )
Anti-wear index: A = m 0 - ( m 1 + m 2 ) m 0 × 100 % - - - ( 6 )
In formula: m 0-enter bulging sample mass, kg;
M 1+ 6.3mm grade part mass after-rotary drum, kg;
M 2-6.3mm after-rotary drum ~+0.5mm grade part mass, kg.
The low temperature reduction degradation experimental evidence " using the method for cold rotary drum after the static reduction of iron ore low temperature efflorescence test " (GB/T13242-91) of agglomerate carries out, and experimental installation as shown in Figure 2.
The low temperature reduction degradation test of agglomerate is divided into two portions: constant temperature reduction test and drum test.The high temperature stainless steel pipe that constant temperature reduction test uses internal diameter customized to be 75mm is as reaction tubes, and test agglomerate adopts square hole sieve, chooses the sample that 500g granularity is 10 ~ 12.5mm, the drying in oven 1 hour of 105 DEG C; Sample is at N 2under protection, temperature is elevated to 500 DEG C, half an hour constant temperature, the ratio of reducing gas is CO 2: CO:N 2=20:20:60, total flux controls as 15L/min, and reduction temperature controls at 500 DEG C, and the time of reduction is 1 hour.
Rear sample is terminated at pure N after reduction 2room temperature is cooled under protection; the rotary drum being of a size of Ф 130mmx200mm is loaded after weighing; rotary drum turns 300r with the speed of 10r/min; the square hole sieve of rotary drum respectively with 6.3mm, 3.15mm, 0.5mm after terminating rear taking-up sieves, respectively by be greater than in sample 6.3mm per-cent, be greater than 3.15mm per-cent, be less than the per-cent of 0.5mm with RDI + 6.3, RDI + 3.15and RDI -0.5represent.RDI + 3.15for performance assessment criteria, RDI + 6.3and RDI -0.5for reference index.
RDI + 3.15method of calculation are such as formula shown in (7):
RDI + 3.15 = m D 1 + m D 2 m D 0 × 100 - - - ( 7 )
In formula: m d0the quality of sample before the rear rotary drum of-reduction, g;
M d1-stay sample mass on 6.3mm sieve, g;
M d2-stay sample mass on 3.15mm sieve, g;
Specific embodiment 1
According to pellet formation requirement, fully will mix containing vanadium fine powder and wilkinite according to the ratio of 95:5, the content being wherein less than 0.074mm containing granularity in vanadium fine powder is greater than 70%, and upper size boundary is no more than 0.2mm, balling disc is used to add water pelletizing after mixing, the pelletizing made is divided into 5 ~ 8mm, 8 ~ 10mm, 10 ~ 12.5mm and >12.5mm tetra-grades; By containing vanadium fine powder, Black Hills vanadium powder, common fine powder, return mine, lime and coke powder to add water according to the ratio of 28:22:20:17:7:6 and once mix, water content is about 6%, then the material after once mixing is joined in drum pelletizer and carries out secondary mixing, add water in blending process, the alkalescence mixing material water content after adding water is about 7.5%; Take 42kg alkalescence mixing material respectively; 5 ~ 8mm pelletizing 5.6kg; 8 ~ 10mm pelletizing 7kg; 10 ~ 2.5mm pelletizing 12.6kg; >12.5mm pelletizing 2.8kg; all put into drum pelletizer fully to mix, make soda acid mixed sintering material, the 70kg compound made is loaded specification is sinter in sintered cup, it is that the agglomerate of 10 ~ 16mm is as grate-layer material that 2.00kg granularity is housed bottom sintered cup, sintering uses liquefied petroleum gas (LPG) igniting, ignition temperature 1150 DEG C, ignition time is 2min, igniting vacuum cavitations is 7840Pa, down draft sintering, sintering vacuum cavitations is 11760Pa, measure bed of material negative pressure variation in sintering process, bring formulae discovery ventilation property in (3) into, sintered and rear yield rate has been carried out to sintering finished ores, tumbler index, the detection of cryogenic reducting powder index and reductibility.
Use specification sintered cup, adds separately alkaline sintered material and carries out normal sintering test, and step is identical with the mixed super deep-bed sintering of soda acid.
Respectively sinter quality detection is carried out to two groups of tests according to national standard, comprise yield rate, barrate strength, cryogenic reducting powder index.
Obtain result as shown in table 2.
The effect of table 2 soda acid super thick bed of material sintering technology
Test Ventilation property Yield rate/% Tumbler index/% RDI +3.15/%
Normal sintering is tested 0.031 65.63 52.00 25.22
Soda acid mixes super deep-bed sintering 0.037 84.84 54.20 58.80
As shown in Table 2, soda acid mixes the yield rate of agglomerate, tumbler index and the RDI that super thick bed of material sintering technology is produced + 3.15all be significantly improved compared with conventional sintering technique, prove that soda acid super thick bed of material sintering technology exists clear superiority.
Specific embodiment 2
According to pellet formation requirement, fully will mix containing vanadium fine powder and wilkinite according to the ratio of 95:5, the content being wherein less than 0.074mm containing granularity in vanadium fine powder is greater than 70%, and upper size boundary is no more than 0.2mm, balling disc is used to add water pelletizing after mixing, the pelletizing made is divided into 5 ~ 8mm, 8 ~ 10mm, 10 ~ 12.5mm and >12.5mm tetra-grades; By containing vanadium fine powder, Black Hills vanadium powder, common fine powder, return mine, lime and coke powder to add water according to the ratio of 28:22:20:17:7:6 and once mix, water content is about 6%, then the material after once mixing is joined in drum pelletizer and carries out secondary mixing, add water in blending process, the alkalescence mixing material water content after adding water is about 7.5%; Take 42kg alkalescence mixing material respectively; 5 ~ 8mm pelletizing 4.2kg; 8 ~ 10mm pelletizing 7kg; 10 ~ 2.5mm pelletizing 11.2kg; >12.5mm pelletizing 5.6kg; all put into drum pelletizer fully to mix, make soda acid mixed sintering material, the 70kg compound made is loaded specification is sinter in sintered cup, it is that the agglomerate of 10 ~ 16mm is as grate-layer material that 2.00kg granularity is housed bottom sintered cup, sintering uses liquefied petroleum gas (LPG) igniting, ignition temperature 1150 DEG C, ignition time is 2min, igniting vacuum cavitations is 7840Pa, down draft sintering, sintering vacuum cavitations is 11760Pa, measure bed of material negative pressure variation in sintering process, bring formulae discovery ventilation property in (3) into, sintered and rear yield rate has been carried out to sintering finished ores, tumbler index, the detection of cryogenic reducting powder index and reductibility.
Use specification sintered cup, adds separately alkaline sintered material and carries out normal sintering test, and step is identical with the mixed super deep-bed sintering of soda acid.
Respectively sinter quality detection is carried out to two groups of tests according to national standard, comprise yield rate, barrate strength, cryogenic reducting powder index.
Obtain result as shown in table 3.
The effect of table 3 soda acid super thick bed of material sintering technology
Test Ventilation property Yield rate/% Tumbler index/% RDI +315/%
Normal sintering is tested 0.031 65.63 52.00 25.22
Soda acid mixes super deep-bed sintering 0.039 86.12 52.29 56.76
As shown in Table 3, soda acid mixes the yield rate of agglomerate, tumbler index and the RDI that super thick bed of material sintering technology is produced + 3.15all be significantly improved compared with conventional sintering technique, prove that soda acid super thick bed of material sintering technology exists clear superiority.
Specific embodiment 3
According to pellet formation requirement, fully will mix containing vanadium fine powder and wilkinite according to the ratio of 95:5, the content being wherein less than 0.074mm containing granularity in vanadium fine powder is greater than 70%, and upper size boundary is no more than 0.2mm, balling disc is used to add water pelletizing after mixing, the pelletizing made is divided into 5 ~ 8mm, 8 ~ 10mm, 10 ~ 12.5mm and >12.5mm tetra-grades; By containing vanadium fine powder, Black Hills vanadium powder, common fine powder, return mine, lime and coke powder to add water according to the ratio of 28:22:20:17:7:6 and once mix, water content is about 6%, then the material after once mixing is joined in drum pelletizer and carries out secondary mixing, add water in blending process, the alkalescence mixing material water content after adding water is about 7.5%; Take 42kg alkalescence mixing material respectively; 5 ~ 8mm pelletizing 5.6kg; 8 ~ 10mm pelletizing 8.4kg; 10 ~ 2.5mm pelletizing 11.2kg; >12.5mm pelletizing 2.8kg; all put into drum pelletizer fully to mix, make soda acid mixed sintering material, the 70kg compound made is loaded specification is sinter in sintered cup, it is that the agglomerate of 10 ~ 16mm is as grate-layer material that 2.00kg granularity is housed bottom sintered cup, sintering uses liquefied petroleum gas (LPG) igniting, ignition temperature 1150 DEG C, ignition time is 2min, igniting vacuum cavitations is 7840Pa, down draft sintering, sintering vacuum cavitations is 11760Pa, measure bed of material negative pressure variation in sintering process, bring formulae discovery ventilation property in (3) into, sintered and rear yield rate has been carried out to sintering finished ores, tumbler index, the detection of cryogenic reducting powder index and reductibility.
Use specification sintered cup, adds separately alkaline sintered material and carries out normal sintering test, and step is identical with the mixed super deep-bed sintering of soda acid.
Respectively sinter quality detection is carried out to two groups of tests according to national standard, comprise yield rate, barrate strength, cryogenic reducting powder index.
Obtain result as shown in table 4.
The effect of table 4 soda acid super thick bed of material sintering technology
Test Ventilation property Yield rate/% Tumbler index/% RDI +315/%
Normal sintering is tested 0.031 65.63 52.00 25.22
Soda acid mixes super deep-bed sintering 0.040 77.55 54.14 56.02
As shown in Table 4, soda acid mixes the yield rate of agglomerate, tumbler index and the RDI that super thick bed of material sintering technology is produced + 3.15all be significantly improved compared with conventional sintering technique, prove that soda acid super thick bed of material sintering technology exists clear superiority.

Claims (4)

1. the soda acid mixed sintering material adding acidic pellet ore (green-ball) during the feature that novel soda acid mixes super thick bed of material sintering technology is to use carries out the thick super deep-bed sintering of 1000mm, and the ratio of the acidic pellet ore size fractionated added in compound.
2. soda acid mixed sintering material acidic pellet ore (green-ball) addition is 30 ~ 50% as claimed in claim 1.
3. in soda acid mixed sintering material as claimed in claim 1, the ratio of each grade acidic pellet ore (green-ball) and alkaline material is: 5 ~ 8mm acidic pellet ore (green-ball) is 3% ~ 8%, 8 ~ 10mm acidic pellet ore (green-ball) is 10% ~ 15%, 10 ~ 12.5mm acidic pellet ore (green-ball) is 15% ~ 25%, >12.5mm acidic pellet ore (green-ball) is 2% ~ 5%, and alkaline material content is 50% ~ 70% (weight is by 100%).
4. sintering method as claimed in claim 1, puts into drum pelletizer in proportion by alkaline material and acidic pellet ore (green-ball) and mixes, put into afterwards sinter in sintered cup, it is that the agglomerate of 10 ~ 16mm is as grate-layer material that 2.00kg granularity is housed bottom sintered cup, sintering uses liquefied petroleum gas (LPG) igniting, ignition temperature 1150 DEG C, ignition time is 2min, and igniting vacuum cavitations is 7840Pa, down draft sintering, sintering vacuum cavitations is 11760Pa, measures bed of material negative pressure variation in sintering process.
CN201410082828.6A 2014-03-05 2014-03-05 Method for sintering acid pellet and alkaline material mixed super-thick material layer Expired - Fee Related CN104894367B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410082828.6A CN104894367B (en) 2014-03-05 2014-03-05 Method for sintering acid pellet and alkaline material mixed super-thick material layer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410082828.6A CN104894367B (en) 2014-03-05 2014-03-05 Method for sintering acid pellet and alkaline material mixed super-thick material layer

Publications (2)

Publication Number Publication Date
CN104894367A true CN104894367A (en) 2015-09-09
CN104894367B CN104894367B (en) 2020-11-03

Family

ID=54027317

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410082828.6A Expired - Fee Related CN104894367B (en) 2014-03-05 2014-03-05 Method for sintering acid pellet and alkaline material mixed super-thick material layer

Country Status (1)

Country Link
CN (1) CN104894367B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105886753A (en) * 2016-06-22 2016-08-24 中冶华天工程技术有限公司 System and sintering process taking pellet return fines as embedded materials
CN106337117A (en) * 2016-09-12 2017-01-18 鞍钢股份有限公司 Super-thick material layer sintering method for dual-alkalinity complex sintered ore
CN106636618A (en) * 2016-09-16 2017-05-10 北京工业大学 Fuel gradation homoenergetic sintering method
CN111398119A (en) * 2020-03-24 2020-07-10 中冶长天国际工程有限责任公司 Air permeability detection robot system and sintering process control method and system
CN112501429A (en) * 2020-11-30 2021-03-16 安徽工业大学 Sintering process SO2、NOxCollaborative emission reduction method
CN112609072A (en) * 2020-11-30 2021-04-06 安徽工业大学 Emission reduction SO for sintering process2、NOxMethod for preparing pellets
CN114525370A (en) * 2022-02-14 2022-05-24 包头钢铁(集团)有限责任公司 Furnace burden structure for blast furnace high-ball ratio smelting

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1042188A (en) * 1988-10-27 1990-05-16 冶金工业部钢铁研究总院 Geminus temperature control sintering method
WO1997024414A1 (en) * 1995-12-29 1997-07-10 Pohang Iron & Steel Co., Ltd. Method for manufacturing coal agglomerates for use in direct iron smelting reducing furnace
CN1248636A (en) * 1999-09-29 2000-03-29 冶金工业部钢铁研究总院 Method for making pellet agglomerate used in iron-smelting
US20040025633A1 (en) * 2002-05-28 2004-02-12 Tetsugen Corporation Carbon containing nonfired agglomerated ore for blast furnace and production method thereof
CN1924035A (en) * 2005-09-01 2007-03-07 中南大学 Composite agglomeration technology of iron powdered ore
CN101037720A (en) * 2007-04-28 2007-09-19 中南大学 Method for sintering iron ore powder with super high material layer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1042188A (en) * 1988-10-27 1990-05-16 冶金工业部钢铁研究总院 Geminus temperature control sintering method
WO1997024414A1 (en) * 1995-12-29 1997-07-10 Pohang Iron & Steel Co., Ltd. Method for manufacturing coal agglomerates for use in direct iron smelting reducing furnace
CN1248636A (en) * 1999-09-29 2000-03-29 冶金工业部钢铁研究总院 Method for making pellet agglomerate used in iron-smelting
US20040025633A1 (en) * 2002-05-28 2004-02-12 Tetsugen Corporation Carbon containing nonfired agglomerated ore for blast furnace and production method thereof
CN1924035A (en) * 2005-09-01 2007-03-07 中南大学 Composite agglomeration technology of iron powdered ore
CN101037720A (en) * 2007-04-28 2007-09-19 中南大学 Method for sintering iron ore powder with super high material layer

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
冶金与材料工程/北京首钢国际工程技术有限公司: "《冶金工程设计研究与创新》", 28 February 2013 *
张天启: "《竖炉球团技能300问》", 30 June 2013 *
李兴凯: "《竖炉球团》", 30 November 1982, 冶金工业出版社 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105886753A (en) * 2016-06-22 2016-08-24 中冶华天工程技术有限公司 System and sintering process taking pellet return fines as embedded materials
CN106337117A (en) * 2016-09-12 2017-01-18 鞍钢股份有限公司 Super-thick material layer sintering method for dual-alkalinity complex sintered ore
CN106337117B (en) * 2016-09-12 2018-05-29 鞍钢股份有限公司 A kind of super thick bed of material sintering method of double basicity composite sinters
CN106636618A (en) * 2016-09-16 2017-05-10 北京工业大学 Fuel gradation homoenergetic sintering method
CN111398119A (en) * 2020-03-24 2020-07-10 中冶长天国际工程有限责任公司 Air permeability detection robot system and sintering process control method and system
CN111398119B (en) * 2020-03-24 2022-08-16 中冶长天国际工程有限责任公司 Air permeability detection robot system and sintering process control method and system
CN112501429A (en) * 2020-11-30 2021-03-16 安徽工业大学 Sintering process SO2、NOxCollaborative emission reduction method
CN112609072A (en) * 2020-11-30 2021-04-06 安徽工业大学 Emission reduction SO for sintering process2、NOxMethod for preparing pellets
CN112501429B (en) * 2020-11-30 2023-10-24 安徽工业大学 SO in sintering process 2 、NO x Synergistic emission reduction method
CN112609072B (en) * 2020-11-30 2023-10-31 安徽工业大学 SO emission reduction used in sintering process 2 、NO x Method for preparing pellets of (2)
CN114525370A (en) * 2022-02-14 2022-05-24 包头钢铁(集团)有限责任公司 Furnace burden structure for blast furnace high-ball ratio smelting

Also Published As

Publication number Publication date
CN104894367B (en) 2020-11-03

Similar Documents

Publication Publication Date Title
CN104894367A (en) Sintering technology for acidic pellet ore and alkaline material mixed ultra-thick material layer
CN102127636B (en) Method for preparing low-SiO2 high-performance sinter ore
CN104630449B (en) Method for preparing sintered ore by using high-chromium-type vanadium-titanium mixture
CN108642272A (en) A kind of brown ocher high mixture ratio sintering method
CN101928823A (en) Sintering method of iron ore powder with high content of crystal water
CN109652643B (en) High-quality sinter for COREX smelting reduction iron-making process and preparation method thereof
CN101215632A (en) Bonding agent for iron ore pellet and preparation method thereof
CN101906533B (en) Low-silicon magnesium-containing pellets and production method thereof
CN102443693A (en) Sintering method of high-grade high-titania vanadium-titanium magnetite concentrate
CN105219907A (en) The iron-smelting process of high-phosphor oolitic hematite gas base directly reducing-mill ore magnetic selection
CN106119524A (en) A kind of low silicon height magnesioferrite pelletizing preparation method
CN111748666B (en) Method for smelting low-silicon pig iron by using iron ore with complex mineral structure
CN104726696B (en) Middle basicity deep-bed sintering production method
CN109517977A (en) A kind of sintering method of high-chromic vanadium-titanium ferroferrite fine powder with addition of common fine powder of magnetite
CN102409167B (en) Sintered ore pulverization inhibitor and adding method thereof
CN104313308A (en) Iron ore low-carbon sintering method
CN103374635B (en) Blast furnace slag recycling method
CN107841620A (en) A kind of magnesia iron ore pellets preparation method of low titanium
CN103290227A (en) Preparation method of nickel-chromium cast iron with stainless steel dedusting ash as raw material
CN102373332A (en) Ultra-micro magnesium carbonate pellet additive, preparation method thereof, and application thereof
CN205907322U (en) System for handle red mud
CN102230077B (en) Mixture for producing sintering ores
Kang et al. Flue gas circulating sintering based on biomass fuel on reduction of nox and SO2 emission
CN103641340A (en) Preparation method of high-activity manganese slag-mineral slag composite micro powder
CN107142120A (en) A kind of high response coke and preparation method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C41 Transfer of patent application or patent right or utility model
TA01 Transfer of patent application right

Effective date of registration: 20151208

Address after: 063000 Hebei province Tangshan City Xinhua West Road No. 46 North China University of science and technology

Applicant after: North China Polytechnics

Address before: 063000 Hebei province Tangshan Xinhua West Road No. 46 Hebei United University Jiashuyuan 210-2-402

Applicant before: Lv Qing

Applicant before: Wu Weinan

Applicant before: Feng Shuai

C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB03 Change of inventor or designer information

Inventor after: Sun Yanqin

Inventor after: Zhu Hongrui

Inventor after: Zhao Guohong

Inventor after: Lv Qing

Inventor after: Liu Xiaojie

Inventor after: Wu Weinan

Inventor after: Wan Xinyu

Inventor before: Lv Qing

Inventor before: Wu Weinan

Inventor before: Feng Shuai

Inventor before: Wang Ruizhe

Inventor before: Sun Yanqin

Inventor before: Liu Xiaojie

Inventor before: Wan Xinyu

CB03 Change of inventor or designer information
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20201103

Termination date: 20210305

CF01 Termination of patent right due to non-payment of annual fee