CN104789720B - A kind of distributing method of blast furnace pelletizing - Google Patents
A kind of distributing method of blast furnace pelletizing Download PDFInfo
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- CN104789720B CN104789720B CN201510172312.5A CN201510172312A CN104789720B CN 104789720 B CN104789720 B CN 104789720B CN 201510172312 A CN201510172312 A CN 201510172312A CN 104789720 B CN104789720 B CN 104789720B
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Abstract
The invention discloses the distributing method of a kind of blast furnace pelletizing, belong to blast furnace material distribution technical field.The present invention creatively utilizes the difference of the property of raw material that blast furnace used, the pelletizing that vast scale uses rationally is split, raw materials for sintering is utilized the flow behavior of pelletizing to be split, pelletizing is made no longer to have " mobility " when vast scale uses, thus thoroughly solve to use the instable problem of blast furnace charge level after pelletizing at high proportion, and then stablize upper blast furnace air-flow, improve blast furnace gas utilization rate, reduce pig iron cost.
Description
Technical field
The present invention relates to the distributing method of a kind of blast furnace pelletizing, belong to blast furnace material distribution technical field.
Background technology
It is said that in general, the upper limit of pelletizing ratio is 20% in the raw material of China's ironmaking circle acquiescence.nullAfter in the raw material that blast furnace is used, the ratio of pelletizing is more than 20%，Due to the impact that pelletizing rollability is strong，The charge level that blast furnace raw material is formed will become unstable，And the charge level of instability will greatly affect the stability of the Gas Flow appeared from blast furnace charge level (in blast furnace，Furnace charge moves downward from upper blast furnace，And Gas Flow from bottom house to ionized motion，Both direction of motion contrast)，And the instability of Gas Flow will affect the direct motion of blast furnace，Blast furnace once direct motion is bad，Mean that heat energy and the chemical energy of the coal gas contacted with blast furnace are not well utilised，So energy in coal gas is not the most well utilised，Will eventually make to increase as the Fuel Consumption of blast furnace main energy sources，Ironmaking cost is caused to increase，And，If things go on like this，Disastrous effect after a series of smooth operation of furnace variation caused because air-flow is unstable，Will greatly affect the life-span of blast furnace.
Traditional distributing method be by by pelletizing cloth two ends be sintering material section in the middle of, the problem solving pelletizing cloth with this.But after pelletizing ratio is more than 20%, the charge level structure that this kind of distributing method can make blast furnace material distribution produce is the most unstable, makes whole charge level be provided with " mobility ".And the instability of charge level can directly result in the instability of blast furnace air-flow, finally affect smooth operation of furnace, the most more cannot be carried out high-coal ratio and smelt.
Summary of the invention
It is desirable to provide the distributing method of a kind of blast furnace pelletizing, solve the problem that blast furnace charge level is unstable in the case of vast scale uses pelletizing, thus stablize blast furnace air-flow, improve smooth operation of furnace, reduction pig iron cost, extend blast furnace service life.
The distributing method of a kind of blast furnace pelletizing that the present invention provides, splits pelletizing, is divided into some parts of pellets to enter stove, midfeather sintering deposit, and the pellet ratio of use can reach more than 30%.
Said method specifically includes following steps:
A. the amount of pellet is proportionally split, if the pelletizing ratio used is the 30% ~ 40% of ore total amount, then pelletizing is divided into 3 parts, if the pelletizing ratio used is more than the 40% of ore total amount, be then divided into 4 ~ 5 parts；
B. in order to split pellet, carry out sintering deposit consumption the most according to a certain percentage accordingly being divided into 3 ~ 5 parts；
C. according to " pellet+sintering deposit+pellet+sintering deposit+...+pellet+sintering deposit " mode arrange raw material；
D. the above-mentioned raw material sequenced is entered furnace top material tank for blast furnace；
E. the material in batch can is discharged into blast furnace according to the given angle number of turns corresponding with given angle, utilizes sintering deposit to be split by pellet, form stable furnace roof charge level；
Described given angle is the cloth ore deposit angle of furnace roof batch can distributor chute, and furnace roof batch can distributor chute cloth ore deposit angle is typically between 45.5 ° to 27 °, and different blast furnaces is different due to condition, can carry out the adjustment of angle according to actual production conditions；The described given angle correspondence number of turns is the number of turns rotating cloth ore in corresponding cloth ore deposit angle, i.e. rotates a few circle ores of cloth in corresponding angle, and different blast furnaces is different due to condition, and the number of turns cannot be fixed, and typically chooses 2 ~ 4 circles.
Further, described pellet is divided into 3 parts, and the pellet ration of division that 1800m blast furnace is conventional is 20%, 57.5%, 22.5%.
Further, described sintering deposit is divided into 3 parts, and the sintering deposit ration of division that 1800m blast furnace is conventional is 35%, 30%, 35%.
The general principle of the present invention: due to the problem of the charge level " mobility " that vast scale use pelletizing can bring, the present invention uses " split plot design " Strand Feeding Technique.Sintering that so-called split plot design Strand Feeding Technique refers to utilize blast furnace to use, the difference (sintering rollability difference and pelletizing rollability is good) of pelletizing rolling characteristic, rationally split a kind of method of " mobility " to reduce overall furnace charge from the amount used by furnace charge (pelletizing) good for rollability to it.
The advantage of this distributing mode is that the pelletizing being readily able to flowing split, decreases impact to blast furnace charge level stability after a large amount of pelletizing concentration is distributed into, thus the problem creatively solving vast scale pelletizing cloth blanking face stability.
The present invention'sBeneficial effect:
1. solving vast scale and use the problem of blast furnace charge level stability after pelletizing so that blast furnace steady air current, the working of a furnace is stable, and fuel ratio reduces；
2. when pelletizing production ability is stronger, the potentiality of pelletizing production can be given full play to, reduce the demand of sintering, reduce and sinter machine speed, thus reduce enterprise's demand to expensive outsourcing breeze, final sintering cost and the pig iron cost of reducing, the competitiveness of enhancing enterprise.
Detailed description of the invention
Further illustrate the present invention below by embodiment, but be not limited to following example.
Embodiment:
As a example by Taiyuan Iron and Steel Co. 1800m blast furnace, the inventive method is described.The iron-smelting raw material structure that Taiyuan Iron and Steel Co. 1800m blast furnace uses is " 60% sintering+40% pelletizing ", and the quality size of a collection of iron-smelting raw material that 1800m blast furnace is conventional is 46t, then in 46t iron-smelting raw material, the quality of sintering deposit should be 27.6t, and the quality of pelletizing should be 18.4t.
1. according to the method for the present invention, the amount of pelletizing is split according to certain ratio.The pelletizing ration of division that 1800m blast furnace is conventional is 20%, 57.5%, 22.5%.So, the amount of pelletizing is just divided into 3.68t, 10.58t, 4.14t tri-part.
2. in order to split pelletizing, accordingly sintering consumption is split the most according to a certain percentage.The sintering ration of division that 1800m blast furnace is conventional is 35%, 30%, 35%.So, the amount of sintering is just divided into 9.66t, 8.28t, 9.66t tri-part.
3. discharge corresponding raw material, i.e. discharge system according to the mode of " pelletizing+sintering+pelletizing+sintering+pelletizing+sintering " and carry out discharge according to amount and the order of " 3.68t pelletizing+9.66t sintering+10.58t pelletizing+8.28t sintering+4.14t pelletizing+9.66t sintering ".
4. the above-mentioned raw material sequenced is entered furnace top material tank for blast furnace.Discharge material due to discharge system to discharge in a certain order, so, raw material enters furnace roof batch can also to be carried out according to this order.
5. the material in batch can is discharged into blast furnace according to given angle and the number of turns, utilizes sintering to be split by pelletizing, form stable furnace roof charge level.The burden distribution matrix that Taiyuan Iron and Steel Co. 1800m blast furnace material distribution uses is 3(45.5 °) 3(42.5 °) 3(39 °) 3(35.5 °) 2(29 °), wherein, 3(45.5 °) refer to that cloth swivel chute rotates cloth 3 on 45.5 ° and encloses；3(42.5 °) refer to that cloth swivel chute rotates cloth 3 on 42.5 ° and encloses；3(39 °) refer to that cloth swivel chute rotates cloth 3 on 39 ° and encloses；3(35.5 °) refer to that cloth swivel chute rotates cloth 3 on 35.5 ° and encloses；2(29 °) refer to that cloth swivel chute rotates cloth 2 on 29 ° and encloses.
After pelletizing ratio increases to 30%, the observation of charge level is proved after have employed distributing mode, production practices and system overhaul damping down by 1800m blast furnace, and this distributing mode charge level has good stability, and central gas stream is vigorous and stablizes.
Claims (4)
1. the distributing method of a blast furnace pelletizing, it is characterised in that: being split by pelletizing, be divided into some parts of pellets to enter stove, midfeather sintering deposit, the pellet ratio of use can reach more than 30%；Comprise the following steps:
A. the amount of pellet is split in proportion, if the pelletizing ratio used is the 30% ~ 40% of ore total amount, then pelletizing is divided into 3 parts, if the pelletizing ratio used is more than the 40% of ore total amount, be then divided into 4 ~ 5 parts；
B. in order to split pellet, carry out sintering deposit consumption the most according to a certain percentage accordingly being divided into 3 ~ 5 parts；
C. according to " pellet+sintering deposit+pellet+sintering deposit+...+pellet+sintering deposit " mode arrange raw material；
D. the above-mentioned raw material sequenced is entered furnace top material tank for blast furnace；
E. the material in batch can is discharged into blast furnace according to the given angle number of turns corresponding with given angle, utilizes sintering deposit to be split by pellet, form stable furnace roof charge level；Described given angle is the cloth ore deposit angle of furnace roof batch can distributor chute, and the described given angle correspondence number of turns is the number of turns rotating cloth ore in corresponding cloth ore deposit angle.
The distributing method of blast furnace pelletizing the most according to claim 1, it is characterised in that: described pellet is divided into 3 parts, and the pellet ration of division that 1800m blast furnace is conventional is 20%, 57.5%, 22.5%.
The distributing method of blast furnace pelletizing the most according to claim 1, it is characterised in that: described sintering deposit is divided into 3 parts, and the sintering deposit ration of division that 1800m blast furnace is conventional is 35%, 30%, 35%.
The distributing method of blast furnace pelletizing the most according to claim 1, it is characterised in that: the cloth ore deposit angle of described furnace roof batch can distributor chute is 27 ° ~ 45.5 °, and often under the angle of group cloth ore deposit, the corresponding arrangement number of turns is 2 ~ 4 circles.
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| CN104789720B true CN104789720B (en) | 2016-08-24 |
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| CN106929619B (en) * | 2017-03-09 | 2019-03-29 | 江苏省沙钢钢铁研究院有限公司 | A kind of distributing method improving blast furnace circumferencial direction work uniformity |
| CN107119163A (en) * | 2017-06-08 | 2017-09-01 | 唐山钢铁集团有限责任公司 | A kind of Burden distribution method of blast furnace of pelletizing at high proportion |
| CN107782760B (en) * | 2017-10-20 | 2019-09-24 | 武汉钢铁有限公司 | The test method of high furnace charge melting Performance Match degree |
| CN115029490A (en) * | 2022-07-22 | 2022-09-09 | 广东韶钢松山股份有限公司 | Method for quickly recovering air under blast furnace blast-ball ore ratio working condition |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010920A (en) * | 2010-12-24 | 2011-04-13 | 宝钢集团新疆八一钢铁有限公司 | Method for smelting bell-less top blast furnace high proportion pellet ore burden structure |
| CN103882167A (en) * | 2014-03-21 | 2014-06-25 | 济钢集团有限公司 | Material layer structure of blast furnace |
| CN104152614A (en) * | 2014-08-26 | 2014-11-19 | 攀钢集团西昌钢钒有限公司 | Distribution method of blast furnace burdens |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010920A (en) * | 2010-12-24 | 2011-04-13 | 宝钢集团新疆八一钢铁有限公司 | Method for smelting bell-less top blast furnace high proportion pellet ore burden structure |
| CN103882167A (en) * | 2014-03-21 | 2014-06-25 | 济钢集团有限公司 | Material layer structure of blast furnace |
| CN104152614A (en) * | 2014-08-26 | 2014-11-19 | 攀钢集团西昌钢钒有限公司 | Distribution method of blast furnace burdens |
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