CN109182735A - Highly crystalline water limonite sintering method - Google Patents
Highly crystalline water limonite sintering method Download PDFInfo
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- CN109182735A CN109182735A CN201811369754.9A CN201811369754A CN109182735A CN 109182735 A CN109182735 A CN 109182735A CN 201811369754 A CN201811369754 A CN 201811369754A CN 109182735 A CN109182735 A CN 109182735A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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Abstract
The present invention provides a kind of highly crystalline water limonite sintering method, sintering feed: your sand fine ore 20-25%, secondary resource 20-25%, Dahongshan concentrate 25-30%, import Brazil fine ore 5-8%, agstone 6-9%, dolomite dust 3-5%, calcium lime powder 3-5%, coke blacking 3-5%, summation 100% is equipped with by following mass ratio；It is sent on sintering machine after mixing, under conditions of the sintering machine speed of service is 0.85-1.1m/min, sintering machine outlet temperature is 380-470 DEG C, rear of sintering machine exhaust gas temperature is 105-135 DEG C, negative pressure is 10-14.5Kpa, completes the sintering of mixture.It solves the problem of that sinter is made to be not easy to bond or even generate explosion and dusting because crystallizing water evaporation, it is ensured that the intensity of sinter, while fuel consumption 5kg/t is reduced, the rate of return mine reduces by 2%, and yield rate improves 10%, and further expansion ore resources utilize.
Description
Technical field
The present invention relates to a kind of limonite sintering method, especially a kind of highly crystalline water limonite sintering method belongs to burning
Tie mine production technical field.
Background technique
The crystallization water contained by limonite can make sinter be not easy to bond because crystallizing water evaporation during the sintering process up to after 11%,
Explosion and dusting are even generated, sinter strength deficiency is eventually led to, reduces yield rate, increase the rate of return mine.
Your sand powder that iron and steel enterprise uses at present belongs to highly crystalline water limonite, and crystal water content is up to 18-19%, is
2 times of common limonite, therefore your highly crystalline water problems of sand mine how solved, this mineral resources is made full use of, reduces ironmaking
Use mine cost, be the great difficult problem that iron and steel enterprise faces.Therefore, it is necessary to be improved existing sintering technology.
Summary of the invention
It is an object of the invention to overcome the shortcomings of the prior art, a kind of highly crystalline water limonite sintering side is provided
Method.
To optimize materials structure, to improve sintering feed blending efficiency, raising material temperature, and then sinter strength is improved, reduced
Consumption.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions:
A kind of highly crystalline water limonite sintering method, it is characterised in that pass through following each step:
1) sintering feed is equipped with by following mass ratio:
Your sand fine ore 20-25%, secondary resource 20-25%, Dahongshan concentrate 25-30%, import Brazil fine ore 5-8%, agstone
6-9%, dolomite dust 3-5%, calcium lime powder 3-5%, coke blacking 3-5%, summation 100%；
The secondary resource is the raw material of following mass ratio: sinter return fine 65-75%, dedusting ash 5-10%, oxidizing slag 10-20%, refining
Steel sludge 10-20%, secondary resource summation are 100%；
2) raw material of step 1) is subjected to herringbone windrow with stacker-reclaimer, windrow sequence are as follows: your sand fine ore, secondary resource, greatly
Red Hill concentrate, import Brazil fine ore, agstone, dolomite dust, the windrow number of plies of each material heap is 680-720 layers, and is formed
The blending ore of basicity R=1.4-1.8, TFe=51 ± 0.8%；
3) tunneling boring feeding is carried out with blending ore of the stacker-reclaimer to step 2, be sent into batch bin, while by calcium lime powder, coke
Powder is sent into batch bin, forms batch；
4) batch of step 3) is sent into mixing machine, adds water and be passed through steam into mixing machine, controls the basicity R of batch
=2.0-2.2, moisture 7.2-7.8%, fixed carbon 3.2-3.7%, 45-55 DEG C of batch temperature, obtain mixture；
5) by the discharge quantity of 240-270t/h and under conditions of material blanking roller revolving speed is 400-1000 turns/min, by step 4)
Mixture is laid on sintering machine, after being 680-725mm with steel plate pressure mixture to thickness of feed layer, in the sintering machine speed of service
For 0.85-1.1 m/min, sintering machine outlet temperature be 380-470 DEG C, rear of sintering machine exhaust gas temperature is 105-135 DEG C, negative pressure
Under conditions of 10-14.5Kpa, the sintering of mixture is completed, sinter is obtained.
In the coke blacking, mass ratio >=70% shared by granularity≤3mm coke blacking.
In above-mentioned steps of the present invention:
Be added 20-25% secondary resource, so that the sinter return fine ratio in secondary resource is reached 65-75%, be conducive to sintering feed at
Ball；
The coke blacking of 3-5% is added, makes fixed carbon content up to 3.2-3.7%, ensure that rear of sintering machine red beds thickness and sinter
Intensity；
The agstone of 6-9% is added, sintering feed basicity R is made to reach 1.4-1.8；The dolomite dust of 3-5% is added, ensures sinter
In MgO reach 2%-3%, be conducive to improve postorder blast furnace process in clinker mobile performance；The calcium lime powder of 3-5% is added, makes
Sintering mineral products basicity R reaches 2.0-2.2, can not only ensure the material temperature of sintering feed, but also can ensure sinter product strength, make to be sintered
After mineral products enter blast furnace, low temperature dusting index >=65%；
The calcium lime powder of 6-9% is added and is passed through steam in mixing machine, can effectively promote batch temperature to 45-55 DEG C, and
The excessive moistening layer of mixture can be reduced during the sintering process；
Water is added in mixing machine, controls the moisture in mixture in 7.2-7.8%, is conducive to the balling-up of mixture, and can increase
The gas permeability of charging layer；
It is 680-725mm with steel plate pressure mixture to thickness of feed layer, mixture can be made finer and close, be conducive in sintering process
Accumulation of heat reduces the consumption of sintering fuel, and can also making sinter, cementability enhances in melting process, improves the intensity of sinter；
Under conditions of material blanking roller revolving speed is 400-1000 turns/min, it is laid in mixture on sintering machine, is conducive to mixture
Cloth, and in cloth process, since in coke blacking, mass ratio >=70% shared by granularity≤3mm coke blacking can make grain
Degree >=3mm coke blacking is distributed in sinter bed lower part in advance, and granularity≤3mm coke blacking is distributed upper sinter bed top,
And the fuel on top is made to be more than the fuel of lower part, it while reducing firing rate, can guarantee that the quality of sinter is stablized in this way；
The control of sintering machine machine speed guarantees sintering uniformly, continuously, the quality of stabilized sinter in 0.85-1.1 m/min；
Sintering machine outlet temperature is controlled at 380-470 DEG C, and guarantee, which is grilled thoroughly, does not occur raw material phenomenon, ensures the grain of sinter
Degree；
Rear of sintering machine exhaust gas temperature is controlled at 105-135 DEG C, controls fuel consumption, reduces production cost；
Sintering machine vacuum cavitations guarantee do not occur raw material in sintering process in 10-14.5Kpa, save electric quantity consumption.
The stacker-reclaimer, mixing machine, sintering machine are conventional equipment.
The present invention has following advantages and effect: can be 20-25%, highly crystalline water content in usage amount using the above scheme
Your in the case where the sand fine ore of up to 18-19%, solve to make sinter be not easy to bond because crystallizing water evaporation, or even generate explosion
And the problem of dusting, it is ensured that the intensity of sinter, while fuel consumption 5kg/t is reduced, the rate of return mine reduces by 2%, and yield rate improves
10%, expand the utilization of ore resources.
Specific embodiment
The present invention is described further below with reference to embodiment.
The equipment that the present invention is not specifically stated is conventional equipment.
Embodiment 1
1) sintering feed is equipped with by following mass ratio:
Your sand fine ore 20.5%, secondary resource 20%, Dahongshan concentrate 30%, import Brazil fine ore 8%, agstone 7%, dolomite
Powder 5%, calcium lime powder 5%, coke blacking 4.5%；In the coke blacking, mass ratio >=70% shared by granularity≤3mm coke blacking；
The secondary resource is following mass ratio: sinter return fine 70%, dedusting ash 5%, oxidizing slag 15%, steel-smelting sewage sludge 10%；
2) raw material of step 1) is subjected to herringbone windrow with stacker-reclaimer, windrow sequence are as follows: your sand fine ore, secondary resource, greatly
Red Hill concentrate, import Brazil fine ore, agstone, dolomite dust, the windrow number of plies of each material heap is 680 layers, and forms basicity R
=1.4, the blending ore of TFe=51%；
3) tunneling boring feeding is carried out with blending ore of the stacker-reclaimer to step 2, be sent into batch bin, while by calcium lime powder, coke
Powder is sent into batch bin, forms batch；
4) batch of step 3) is sent into mixing machine, adds water and be passed through steam into mixing machine, controls the basicity R of batch
=2.0, moisture 7.6%, fixed carbon 3.2%, batch temperature 45 C, obtain mixture；
5) by the discharge quantity of 240t/h and under conditions of material blanking roller revolving speed is 400 turns/min, the mixture of step 4) is tiled
On sintering machine, with steel plate pressure mixture to thickness of feed layer be 680mm after, the sintering machine speed of service be 0.85 m/min,
Under conditions of sintering machine outlet temperature is 380 DEG C, rear of sintering machine exhaust gas temperature is 105 DEG C, negative pressure is 10Kpa, mixing is completed
The sintering of material, gained sinter quality index: the sinter of granularity 16-40mm is 75%, tumbler index 81.6%, TFe ±
0.5%,R±0.1。
Embodiment 2
1) sintering feed is equipped with by following mass ratio:
Your sand fine ore 25%, secondary resource 23%, Dahongshan concentrate 25%, import Brazil fine ore 8%, agstone 8%, dolomite dust
3%, calcium lime powder 3%, coke blacking 5%；In the coke blacking, mass ratio >=70% shared by granularity≤3mm coke blacking；
The secondary resource is following mass ratio: sinter return fine 75%, dedusting ash 5%, oxidizing slag 10%, steel-smelting sewage sludge 10%；
2) raw material of step 1) is subjected to herringbone windrow with stacker-reclaimer, windrow sequence are as follows: your sand fine ore, secondary resource, greatly
Red Hill concentrate, import Brazil fine ore, agstone, dolomite dust, the windrow number of plies of each material heap is 720 layers, and forms basicity R
=1.8, the blending ore of TFe=51.2%；
3) tunneling boring feeding is carried out with blending ore of the stacker-reclaimer to step 2, be sent into batch bin, while by calcium lime powder, coke
Powder is sent into batch bin, forms batch；
4) batch of step 3) is sent into mixing machine, adds water and be passed through steam into mixing machine, controls the basicity R of batch
=2.2, moisture 7.8%, fixed carbon 3.5%, 48 DEG C of material temperature of cooperation, obtain mixture；
5) by the discharge quantity of 270t/h and under conditions of material blanking roller revolving speed is 900 turns/min, the mixture of step 4) is tiled
On sintering machine, after being 725mm with steel plate pressure mixture to thickness of feed layer, it is 1.1 m/min, burns in the sintering machine speed of service
Under conditions of knot machine outlet temperature is 450 DEG C, rear of sintering machine exhaust gas temperature is 125 DEG C, negative pressure is 14.5Kpa, mixing is completed
The sintering of material, gained sinter quality index: the sinter of granularity 16-40mm is 77%, tumbler index 81.0%, TFe ±
0.4%, R ± 0.05.
Embodiment 3
1) sintering feed is equipped with by following mass ratio:
Your sand fine ore 22%, secondary resource 22%, Dahongshan concentrate 28%, import Brazil fine ore 6%, agstone 9%, dolomite dust
4%, calcium lime powder 4.3%, coke blacking 4.7%；In the coke blacking, mass ratio >=70% shared by granularity≤3mm coke blacking；
The secondary resource is following mass ratio: sinter return fine 65%, dedusting ash 10%, oxidizing slag 15%, steel-smelting sewage sludge 10%；
2) raw material of step 1) is subjected to herringbone windrow with stacker-reclaimer, windrow sequence are as follows: your sand fine ore, secondary resource, greatly
Red Hill concentrate, import Brazil fine ore, agstone, dolomite dust, the windrow number of plies of each material heap is 700 layers, and forms basicity R
=1.6, the blending ore of TFe=50.8%；
3) tunneling boring feeding is carried out with blending ore of the stacker-reclaimer to step 2, be sent into batch bin, while by calcium lime powder, coke
Powder is sent into batch bin, forms batch；
4) batch of step 3) is sent into mixing machine, adds water and be passed through steam into mixing machine, controls the basicity R of batch
=2.1, moisture 7.5%, fixed carbon 3.5%, 50 DEG C of material temperature of cooperation, obtain mixture；
5) by the discharge quantity of 260t/h and under conditions of material blanking roller revolving speed is 800 turns/min, the mixture of step 4) is tiled
On sintering machine, after being 700mm with steel plate pressure mixture to thickness of feed layer, it is 0.9 m/min, burns in the sintering machine speed of service
Under conditions of knot machine outlet temperature is 420 DEG C, rear of sintering machine exhaust gas temperature is 125 DEG C, negative pressure is 12.5Kpa, mixing is completed
The sintering of material, gained sinter quality index: the sinter of granularity 16-40mm is 75%, tumbler index 82.0%, TFe ±
0.5%,R±0.08。
Embodiment 4
1) sintering feed is equipped with by following mass ratio:
Your sand fine ore 25%, secondary resource 20%, Dahongshan concentrate 28%, import Brazil fine ore 6%, agstone 6%, dolomite dust
5%, calcium lime powder 5%, coke blacking 5%；In the coke blacking, mass ratio >=70% shared by granularity≤3mm coke blacking；
The secondary resource is following mass ratio: sinter return fine 68%, dedusting ash 9%, oxidizing slag 13%, steel-smelting sewage sludge 10%；
2) raw material of step 1) is subjected to herringbone windrow with stacker-reclaimer, windrow sequence are as follows: your sand fine ore, secondary resource, greatly
Red Hill concentrate, import Brazil fine ore, agstone, dolomite dust, the windrow number of plies of each material heap is 690 layers, and forms basicity R
=1.5, the blending ore of TFe=51.8%；
3) tunneling boring feeding is carried out with blending ore of the stacker-reclaimer to step 2, be sent into batch bin, while by calcium lime powder, coke
Powder is sent into batch bin, forms batch；
4) batch of step 3) is sent into mixing machine, adds water and be passed through steam into mixing machine, controls the basicity R of batch
=2.0, moisture 7.6%, fixed carbon 3.3%, 55 DEG C of material temperature of cooperation, obtain mixture；
5) by the discharge quantity of 260t/h and under conditions of material blanking roller revolving speed is 600 turns/min, the mixture of step 4) is tiled
On sintering machine, with steel plate pressure mixture to thickness of feed layer be 695mm after, the sintering machine speed of service be 0.99 m/min,
Under conditions of sintering machine outlet temperature is 420 DEG C, rear of sintering machine exhaust gas temperature is 135 DEG C, negative pressure is 14.5Kpa, complete mixed
Close the sintering of material, gained sinter quality index: the sinter of granularity 16-40mm is 79%, tumbler index 83.5%, TFe ±
0.3%,R±0.06。
Claims (2)
1. a kind of highly crystalline water limonite sintering method, it is characterised in that pass through following each step:
1) sintering feed is equipped with by following mass ratio:
Your sand fine ore 20-25%, secondary resource 20-25%, Dahongshan concentrate 25-30%, import Brazil fine ore 5-8%, agstone
6-9%, dolomite dust 3-5%, calcium lime powder 3-5%, coke blacking 3-5%, summation 100%；
The secondary resource is the raw material of following mass ratio: sinter return fine 65-75%, dedusting ash 5-10%, oxidizing slag 10-20%, refining
Steel sludge 10-20%, secondary resource summation are 100%；
2) raw material of step 1) is subjected to herringbone windrow with stacker-reclaimer, windrow sequence are as follows: your sand fine ore, secondary resource, greatly
Red Hill concentrate, import Brazil fine ore, agstone, dolomite dust, the windrow number of plies of each material heap is 680-720 layers, and is formed
The mixing material of basicity R=1.4-1.8, TFe=51 ± 0.8%；
3) tunneling boring feeding is carried out with mixing material of the stacker-reclaimer to step 2, be sent into batch bin, while by calcium lime powder, coke
Powder is sent into batch bin, forms batch；
4) batch of step 3) is sent into mixing machine, adds water and be passed through steam into mixing machine, controls the basicity R of batch
=2.0-2.2, moisture 7.2-7.8%, fixed carbon 3.2-3.7%, 45-55 DEG C of batch temperature, obtain mixture；
5) by the discharge quantity of 240-270t/h and under conditions of material blanking roller revolving speed is 400-1000 turns/min, by step 4)
Mixture is laid on sintering machine, after being 680-725mm with steel plate pressure mixture to thickness of feed layer, in the sintering machine speed of service
For 0.85-1.1 m/min, sintering machine outlet temperature be 380-470 DEG C, rear of sintering machine exhaust gas temperature is 105-135 DEG C, negative pressure
Under conditions of 10-14.5Kpa, the sintering of mixture is completed, sinter is obtained.
2. highly crystalline water limonite sintering method as described in claim 1, it is characterised in that in the coke blacking, granularity≤
Mass ratio >=70% shared by the coke blacking of 3mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110283992A (en) * | 2019-07-20 | 2019-09-27 | 武钢集团昆明钢铁股份有限公司 | A kind of high mixture ratio limonite sintering method |
| CN115491488A (en) * | 2022-09-21 | 2022-12-20 | 宝武集团鄂城钢铁有限公司 | Iron-containing material for sintering with low usage amount of Brazilian mixed powder, sintering composition, sintered ore and preparation method thereof |
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| CN1914338A (en) * | 2004-10-01 | 2007-02-14 | 杰富意钢铁株式会社 | Method for producing sintered ore |
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| CN101928823A (en) * | 2009-06-22 | 2010-12-29 | 鞍钢股份有限公司 | Sintering method of iron ore powder with high content of crystal water |
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| CN1062767A (en) * | 1991-08-17 | 1992-07-15 | 萍乡钢铁厂 | Shaft furnace process is produced the technology and the equipment of limonite pelletizing |
| CN1863932A (en) * | 2003-10-09 | 2006-11-15 | 杰富意钢铁株式会社 | Method for producing sintered ore, method for producing raw material for sintering, granulated pellet, and sintered ore |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110283992A (en) * | 2019-07-20 | 2019-09-27 | 武钢集团昆明钢铁股份有限公司 | A kind of high mixture ratio limonite sintering method |
| CN110283992B (en) * | 2019-07-20 | 2021-04-06 | 武钢集团昆明钢铁股份有限公司 | High-proportion limonite sintering method |
| CN115491488A (en) * | 2022-09-21 | 2022-12-20 | 宝武集团鄂城钢铁有限公司 | Iron-containing material for sintering with low usage amount of Brazilian mixed powder, sintering composition, sintered ore and preparation method thereof |
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Effective date of registration: 20190603 Address after: 650302 science and technology innovation department, Kunjia steel, Lang Jia Zhuang, Anning City, Kunming, Yunnan Applicant after: Wuhan Iron and Steel Group Kunming Steel Co., Ltd. Applicant after: Yuxi Xinxing Iron and Steel Co., Ltd. Address before: 650302 science and technology innovation department, Kungang, Ning Lang Jia Zhuang, Kunming, Yunnan Applicant before: Wuhan Iron and Steel Group Kunming Steel Co., Ltd. |
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Application publication date: 20190111 |