CN1045111C - Method for making quicklime iron concentrate briquette agglomerate - Google Patents
Method for making quicklime iron concentrate briquette agglomerate Download PDFInfo
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- CN1045111C CN1045111C CN96103292A CN96103292A CN1045111C CN 1045111 C CN1045111 C CN 1045111C CN 96103292 A CN96103292 A CN 96103292A CN 96103292 A CN96103292 A CN 96103292A CN 1045111 C CN1045111 C CN 1045111C
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Abstract
The present invention relates to a method for making pellet sintering ore from quicklime iron ore concentrate, which belongs to the field of iron making pellet sintering. Quicklime is totally used as adhesive or fluxing agent by the method of the present invention, and waste generated by iron and steel enterprises is comprehensively used. The pellet sintering ore comprises the raw materials of the following proportion (by weight): 40 to 80 wt% of iron ore concentrate, 5 to 20 wt% of quicklime, 5 to 35 wt% of hot and cold return ore, 0 to 25 wt% of waste containing iron of iron and steel plants and 1 to 3 wt% of any kind of coal powder and coke powder or the sum of the coal powder and the coke powder. Sintering alkalinity is from 1.5 to 3.0. After a small pellet is made, the small pellet and a certain amount of solid fuel are mixed in a mixing machine, and the mixture is sintered by a band type exhaust sintering method. The method of the present invention has the advantages of low cost and good sintering ore quality.
Description
The present invention is a kind of method for making quicklime iron concentrate briquette agglomerate, belongs to the iron smelting pellets sintering art.
In the prior art, the output of sinter machine, quality are subjected to the granulation quality restriction of sinter mixture, and be especially true for full concentrate sintering.At present, domestic and international many enterprises and research institution have carried out a large amount of research and development.All introduced the method for its pellet agglomerate as patent CN 1064107A.CN 87108122A, its method is with mineral fine or rich ore powder, cold and hotly return mine, unslaked lime, Wingdale and additive and part coal dust or coke powder are mixed and made into green pellets, and outside the green pellets surface, roll or outside the coal blending powder, to sinter machine, sinter the pellet agglomerate that can reach the blast furnace requirement into again.The weak point of aforesaid method is that flux or additive are Wingdale or ground dolomite or slaked lime, and is not unslaked lime entirely.The cohesiveness of Wingdale or ground dolomite is relatively poor, and the lime that digested, its digestive fever can not absorb to improve the sinter mixture temperature by mixed material.Moreover Steel Complex produce a large amount of iron content refuses, and as dedusting ash, slag etc. can not fully utilize, so there is the production cost height in aforesaid method, shortcomings such as fuel consumption height.
The purpose of this invention is to provide a kind of method for making quicklime iron concentrate briquette agglomerate, this method all uses unslaked lime as binding agent or flux, and can fully utilize the high basicity mini-pellets agglomerate of the refuse of iron and steel enterprise's generation.Adopt this method can produce good product quality, solid burnup is low, cost is low agglomerate.
The present invention realizes by the following method.With iron ore concentrate, unslaked lime, cold and hotly return mine, add water again under iron-containing waste materials in iron and steel plant or a small amount of coal dust situation and be mixed and made into the bead that requires size, then bead is mixed with coal dust or coke powder, produce small-ball sintering mine with belt down draft sintering legal system.Flow process of the present invention is seen accompanying drawing 1.
Below the inventive method is described in detail:
Fig. 1 is a process flow sheet of the present invention.
Technological process of the present invention is: prepare burden → get the raw materials ready → mixed once → pelletizing → secondary mixes (outer roll coal) → cloth → igniting sintering → crushing hot, cold sieve.
1, get the raw materials ready:
Full iron ore concentrate granularity≤0.08mm accounts for more than 40%, quick lime granularity≤3mm accounts for more than 95%, cold and hot granularity≤the 5mm that returns mine accounts for more than 85%, coal dust or coke fines size≤3mm account for more than 80%, and the granularity≤5mm of ferrous waste (dirt, mud, ash, slag) accounts for more than 90%.
2, batching (weight %) iron ore concentrate 40～80%, unslaked lime 5～20% cold and hotly returns mine 5～35%, iron-containing waste materials in iron and steel plant 0～25%, any in coal dust and the coke powder or sum of the two 1～3%.
Iron-containing waste materials in iron and steel plant be in returning mine under blast furnace dedusting ash, sintering dust separation ash, sintering dust mud, the attached dirt ash of converter, the attached dirt ash of electric furnace, iron scale, slag or the blast furnace groove any one or more.Wherein the slag granularity is less than 5mm, and the water content of iron-containing waste materials in iron and steel plant is less than 35%.
During batching, as the case may be, press pellet agglomerate basicity (CaO/SiO
2) be 1.5～3.0 requirement batching.
3, mix: the raw material of above-mentioned prescription is input in the disk mixing machine mixes, add an amount of water during mixing unslaked lime is fully digested, physics moisture content is controlled between 4.5～7.5%.
4. make ball: the compound behind the mixing is input to makes ball in the balling disc, and the situation of looking balling-up is added water distribution, the moisture content of mini-pellets is controlled between 6.5～8.0%, the granularity of mini-pellets is accounting for more than 75% of 3～10mm, by the inclination angle (40～47 °) of adjustment garden dish machine and the granularity and the output of rotating speed (7～12 rev/mins) and blanking amount control mini-pellets.
5, outer roll coal: mini-pellets and solid fuel (coal dust or coke powder) be input in drum mixer or the ball dish mixing machine mix, the solid fuel add-on is 1.0～4.5% of a mini-pellets gross weight, and the time that stops in mixing machine by rotating speed (7～12 rev/mins), inclination angle (1～3 °), the mini-pellets of adjusting mixing machine, (3～6min) controlled the coal dust that sticks to the green-ball face or the homogeneity behind coke powder and the mixing.
6, cloth: cloth adopts circle roller cloth to add reflector distributor, sintering material layer thickness 〉=350mm.
7, igniting sintering: the inventive method be with mini-pellets cloth directly light a fire to the chassis, sintering; 950～1250 ℃ of ignition temperatures, ignition time 1～3min, igniting negative pressure 4000～6000Pa, sintering negative pressure 4000～10000Pa.
8, fragmentation, heat sieve, cold sieve: adopt shearing single roll crusher, the reusable heat sieve is to the small-ball sintering mine processing later on to be crushed to 40mm, and sieve aperture is 4.5～5mm.Small-ball sintering mine behind the sieve is cooled to below 150 ℃, carries out cold screening again, in the screen underflow 〉=content of 5mm is less than 10%, and screen overflow is the finished product a---small-ball sintering mine.This product can directly be delivered to blast furnace hopper, as blast furnace raw material.
The bead that adopts the inventive method to produce is tied the ore deposit compared with prior art, have following advantage: the inventive method technology is simple, used flux and adhesive for pelletizing all are unslaked lime, improved the cohesive action of granulating, can make the comprehensive utilization of waste materials of Steel Plant, can directly on exhausting formula sinter machine, realize.The system of this method is sticking effective, and bed permeability is good, makes sinter machine productive rate height, and solid burnup is low, reduces the cost of agglomerate, and its technical indicator is better than prior art.
Embodiment:
Adopt the method for the invention, prepared 2 batches of pellet agglomerates, proportion of raw materials such as the table 1 of adopting among the embodiment.Raw material granularity such as table 2.Sintering process and technical indicator such as table 3.
Table 1 embodiment proportioning raw materials (weight %)
Table 2 embodiment raw material granularity and proportion (weight %)
Table 3 processing parameter and technical indicator
| The raw material lot number | Iron ore concentrate | Hot returning ore | Cold returning mine | Unslaked lime | Gray iron removes factory's dirt in the steel | Coal dust | Outer coal rolls powder | Basicity |
| 1 | 59 | 12 | 10 | 8 | 8 | 3 | 1.5 | 2.00 |
| 2 | 87 | 12 | 8 | 5 | 5 | 3 | 1.5 | 1.6 |
| The raw material lot number | Iron is skillful in 0.08 the mm degree in ore deposit for a short time | Heat is returned 3 mm degree in the ore deposit for a short time | Coldly return 5 mm degree for a short time in the ore deposit | Give birth to gravelstone in 3 mm degree of ash | Remove and wait the little ash of dirt in grain 5mm degree | The coal starch is in grain 3 degree mm |
| 1 | 55 | 67 | 95 | 95 | 90 | 93 |
| 2 | 55 | 68.4 | 98 | 98 | 90.2 | 93.7 |
| The project lot number | Surmise bed thickness (mm) | Point degree fire temperature (℃) | Burn and press knot negative (Pa) | Sharp number is with being (t/m 2.hr) | Change (ISO) drum (%) | Admittedly consume body combustion Kg/t | FeO |
| 1 | 500 | 1034 | 9150 | 1.54 | 69.7 | 74.4 | 9.8 |
| 2 | 500 | 1050 | 9500 | 1.62 | 68.9 | 71.8 | 10.7 |
Claims (5)
1, a kind of method for making quicklime iron concentrate briquette agglomerate, comprise get the raw materials ready, prepare burden, mixing, outer roll coal, cloth, igniting sintering, it is characterized in that:
The proportioning raw materials of said pellet agglomerate (weight %) is: iron ore concentrate 40～80%, unslaked lime 5～20% cold and hotly returns mine 5～35%, iron-containing waste materials in iron and steel plant 0～25%, in coal dust and the coke powder any or sum of the two 1～3%, the basicity of this pellet agglomerate are 1.5～3.0.
2, the method for claim 1, it is characterized in that raw material with above-mentioned prescription is input in the drum mixer mixes, and adds an amount of water during mixing unslaked lime is fully digested, and physics moisture content is controlled between 4.5～7.5%; Compound behind the mixing is input to makes ball in the balling disc, the moisture content of mini-pellets is controlled between 6.5～8.5%, the mini-pellets granularity is accounting for more than 75% of 3～10mm, and the inclination angle of multigraph press is 40～47 °, and rotating speed is 7～12 rev/mins; Mini-pellets and solid fuel be input in the mixing machine mix, the solid fuel add-on is 1～4.5% of a mini-pellets gross weight, and the rotating speed of mixing machine is 7～12 rev/mins, and the inclination angle is 1～3 °, the time that mini-pellets stops in mixing machine is 3～6min, sintering material layer thickness 〉=350mm.
3, the method for claim 1, it is characterized in that accounting for more than 40% of iron ore concentrate granularity≤0.08mm, unslaked lime granularity≤3mm accounts for more than 95%, cold and hot granularity≤the 5mm that returns mine accounts for more than 85%, granularity≤the 3mm of coal dust or coke powder accounts for more than 80%, and the granularity≤5mm of ferrous waste accounts for more than 90%.
4,, it is characterized in that said iron-containing waste materials in iron and steel plant is a blast furnace dedusting ash, sintering dust separation ash as claim 1 or 2 or 3 described methods, the electric stove dust ash, iron scale, in returning mine under slag or the blast furnace groove any one or more, the water content of iron-containing waste materials in iron and steel plant is less than 35%.
5, method as claimed in claim 4, ignition temperature is 950～1250 ℃ when it is characterized in that sintering, ignition time 1～3min, igniting negative pressure 4000～6000Pa, sintering negative pressure 4000～10000Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96103292A CN1045111C (en) | 1996-03-18 | 1996-03-18 | Method for making quicklime iron concentrate briquette agglomerate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96103292A CN1045111C (en) | 1996-03-18 | 1996-03-18 | Method for making quicklime iron concentrate briquette agglomerate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1160084A CN1160084A (en) | 1997-09-24 |
| CN1045111C true CN1045111C (en) | 1999-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96103292A Expired - Fee Related CN1045111C (en) | 1996-03-18 | 1996-03-18 | Method for making quicklime iron concentrate briquette agglomerate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055318C (en) * | 1998-05-29 | 2000-08-09 | 冶金工业部钢铁研究总院 | Production of sintered pelletized minerals |
| CZ2005629A3 (en) * | 2005-10-04 | 2007-03-07 | Gajdzica@Karel | Ingredient scrap briquette and process for producing thereof |
| CN101020943A (en) * | 2006-07-12 | 2007-08-22 | 刘光火 | Phosphorus reducing method for process of smelting Ni-Cr pig iron with nickel oxide ore |
| CN101768663B (en) * | 2010-02-01 | 2011-11-16 | 泉州市豪胜铸造有限公司 | Cold bonded iron-carbon pellets, and manufacturing method and applications thereof as ironmaking burden in shaft furnace or blast furnace |
| CN102230078A (en) * | 2010-06-01 | 2011-11-02 | 鞍钢集团矿业公司 | Method for pelletizing pellets by using hot water |
| CN102153294B (en) * | 2010-12-23 | 2013-03-27 | 中冶长天国际工程有限责任公司 | Calcined lime and sintering return ore granulation pretreatment device and method |
| CN102978384B (en) * | 2012-12-24 | 2015-01-21 | 首钢总公司 | Method for using steel slags during sintering |
| CN104060083B (en) * | 2013-06-20 | 2017-02-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Sintering method of vanadium titanium magnetite |
| 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 |
| CN103498046A (en) * | 2013-10-30 | 2014-01-08 | 中冶北方（大连）工程技术有限公司 | Process for mixing materials and making external-rolled coal through sintering machine |
| CN103757202B (en) * | 2014-01-30 | 2016-06-29 | 首钢总公司 | Part is returned mine without the sintering method participating in sintering of granulating |
| CN104278145B (en) * | 2014-10-15 | 2017-01-11 | 首钢总公司 | Method for producing sintering ore |
| CN105274349A (en) * | 2015-11-26 | 2016-01-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Low-sulfur metallized pellet produced by means of blast furnace fly ash and preparation method of low-sulfur metallized pellet |
| CN106350666B (en) * | 2016-09-12 | 2018-02-27 | 鞍钢股份有限公司 | A kind of super thick bed of material sintering production method |
| CN108070714A (en) * | 2016-11-15 | 2018-05-25 | 中冶长天国际工程有限责任公司 | It is a kind of to utilize metallurgy sintered process sludge and the method for Ferrous Metallurgy dedusting ash |
| CN108531677A (en) * | 2018-06-13 | 2018-09-14 | 上海宝幢新能源科技有限公司 | A kind of method and system for realizing the reduction of deep bed sintering pelletizing using rotary hearth furnace |
| CN108728636A (en) * | 2018-06-29 | 2018-11-02 | 宝武集团环境资源科技有限公司 | A method of processing metallurgical dust sludge |
| CN112553459A (en) * | 2020-11-23 | 2021-03-26 | 攀钢集团攀枝花钢铁研究院有限公司 | High-grade vanadium-titanium pellet and preparation method thereof |
| CN113736989B (en) * | 2021-08-26 | 2023-04-07 | 武汉钢铁有限公司 | Sintered ore using dust-removing coke and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064107A (en) * | 1992-03-25 | 1992-09-02 | 冶金工业部钢铁研究总院 | Method for preparing pellet sintered ore |
| BR9203748A (en) * | 1992-09-25 | 1993-04-20 | Siderurgica Nacional Sa | IRON MINING SUPERFINES SINTERIZATION PROCESS |
| JPH05105969A (en) * | 1991-10-11 | 1993-04-27 | Kobe Steel Ltd | Manufacture of sintered ore |
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1996
- 1996-03-18 CN CN96103292A patent/CN1045111C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05105969A (en) * | 1991-10-11 | 1993-04-27 | Kobe Steel Ltd | Manufacture of sintered ore |
| CN1064107A (en) * | 1992-03-25 | 1992-09-02 | 冶金工业部钢铁研究总院 | Method for preparing pellet sintered ore |
| BR9203748A (en) * | 1992-09-25 | 1993-04-20 | Siderurgica Nacional Sa | IRON MINING SUPERFINES SINTERIZATION PROCESS |
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| CN1160084A (en) | 1997-09-24 |
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