CN103805727A - Direct reduction iron hot-charging method by use of chain conveyer - Google Patents
Direct reduction iron hot-charging method by use of chain conveyer Download PDFInfo
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- CN103805727A CN103805727A CN201410067369.4A CN201410067369A CN103805727A CN 103805727 A CN103805727 A CN 103805727A CN 201410067369 A CN201410067369 A CN 201410067369A CN 103805727 A CN103805727 A CN 103805727A
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Abstract
The invention relates to a direct reduction iron hot-charging method by use of a chain conveyer, belonging to the field of direct reduction iron hot-charging technology. The method comprises the processes of discharging hot direct reduction iron into a direct reduction iron storage tank, conveying the direct reduction iron to an electric furnace shop and discharging in a transitional material tank on the furnace top by the chain conveyer, and charging into an electric furnace through a feeding chute. The method has the advantages that the direct reduction iron hot-charging method adopts a mechanical transportation mode, and compared with pneumatic transportation, pneumatic conveying equipment is not required to be constructed, therefore, the investment is low, the energy consumption is low, the equipment is convenient to maintain, and damage of the direct reduction iron during conveying can be reduced; inert gas is introduced for protection during loading of direct reduction iron, so that secondary oxidation of the direct reduction iron can be effectively prevented; the angle of the chain conveyer can be adjusted according to the height of the direct reduction iron production equipment, and is not limited by the height of the direct reduction iron production equipment, therefore, the chain conveyer can be suitable for various production flows.
Description
Technical field
The invention belongs to hot charging technical field, particularly relate to a kind of method that adopts bucket machine hot charging direct-reduced iron.
Background technology
Direct-reduced iron (DRI) can be used as the raw material of smelting high-quality steel, special steel, therefore can replace steel scrap to carry out Electric furnace steel making.In recent years, the technique that direct-reduced iron carries out Electric furnace steel making as raw material is quite general.But, because ore completes after reduction process, the temperature very high (being greater than 600 ℃) of the direct-reduced iron producing, hot direct-reduced iron is sent into steelshop process and is very easy to occur secondary oxidation problem from direct-reduction production unit, and what therefore most of Steel Plant adopted is the raw material of cold conditions direct-reduced iron as electric furnace.
Carry out Electric furnace steel making as the alternative materials of steel scrap with cold direct-reduced iron, as compared with raw material, the indexs such as energy consumption are higher with steel scrap.If adopt hot direct reduced iron as Electric furnace steel making raw material, because the direct-reduced irons of 600 ℃ itself have been brought certain physical thermal into electric furnace, can greatly reduce power consumption and the tap to tap time of Electric furnace steel making.And adopt after direct-reduced iron direct hot charging electric furnace, concerning direct-reduced iron production plant, also can reduce the operation for cooling heat direct-reduced iron.
Although, the heat that a small amount of external steelworks adopts air conveying method to realize direct-reduced iron is sent and hot charging electric furnace, but domestic steelworks is not also for manufacture and the use experience of the air conveying facility of direct-reduced iron, need to be from external introduction, therefore build supporting pneumatic transport equipment and it is safeguarded and is moved, required investment and running cost are all very large.
Summary of the invention
The object of the present invention is to provide a kind of method that adopts bucket machine hot charging direct-reduced iron, be applicable to adopt gas-based shaft kiln MIDREX method or Xi Er HYL to produce then hot charging electric furnace the Electric furnace steel making smelted of direct-reduced iron, be also applicable to alternate manner and produce then hot charging electric furnace the Electric furnace steel making smelted of direct-reduced iron.
The technique of hot charging direct-reduced iron of the present invention is: first, hot direct reduced iron is discharged in direct-reduced iron storage tank, then by bucket machine, direct-reduced iron be transported to electric furnace shop and be discharged in furnace roof transition batch can, then joining in electric furnace through awarding material elephant trunk; Described hot direct reduced iron is produced by gas-based shaft kiln MIDREX method or other method, and the temperature of described described hot direct reduced iron is more than 600 ℃.The present invention is characterized in:
First the hot direct reduced iron that a, gas-based shaft kiln MIDREX method or other method are produced is discharged in direct-reduced iron storage tank.The Main Function of described storage tank is storage hot direct reduced iron and controls electric furnace material loading amount, storage tank inwall is built heat-resistant insulation material by laying bricks or stones, to reduce hot direct reduced iron heat lost by radiation, in storage tank, be full of rare gas element to prevent the secondary oxidation of hot direct reduced iron.
B, described bucket machine are used for hot hot direct reduced iron to be transported to electric furnace shop.The angle of bucket machine can, according to the altitude mixture control of direct-reduced iron production unit, therefore can adapt to various Production Flow Charts.Bucket machine is made up of thermal insulation material, can reduce like this temperature drop of direct-reduced iron.Meanwhile, the vestibule of bucket machine is closed, and the logical protection of inert gas of bucket machine of vestibule inside, prevents the oxidation of direct-reduced iron.
C, described furnace roof transition batch can are used for storing the hot direct reduced iron of electric furnace non-feed time in the time of maintenance or in smelting cycle, and regulate feed rate.Furnace roof transition batch can has two, is positioned at electric furnace top, and the storage capacity of each furnace roof transition batch can meet electric furnace and complete the required material quantity of primary smelting.In furnace roof transition batch can, be full of rare gas element and prevent direct-reduced iron oxidation, inside is built heat-resistant insulation material by laying bricks or stones simultaneously, reduces the temperature drop of direct-reduced iron.
D, described awarding expect that elephant trunk is rotary type, so that electric furnace maintenance interval handling furnace shell.Award material elephant trunk and adopt gas cooling, prevent from that elephant trunk is overheated to deform.
Major advantage of the present invention is: hot charging direct-reduced iron adopts mechanical transportation formula, compares air conveying do not need to build pneumatic transport equipment, less investment.And energy consumption is few, maintenance of equipment is convenient.Be provided with multiple tracks transhipment operation, can reduce the breakage of direct-reduced iron in course of conveying.In direct-reduced iron feeding process, adopt protection of inert gas, can effectively prevent the secondary oxidation of direct-reduced iron.The angle of bucket machine can, according to the altitude mixture control of direct-reduced iron production unit, not be subject to the restriction of direct-reduced iron production unit height, can adapt to various Production Flow Charts.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.Wherein, hot direct reduced iron 1, storage tank 2, bucket machine vestibule 3 bucket machines 4, furnace roof transition batch can 5, award material elephant trunk 6, electric furnace.
Embodiment
Fig. 1 is a kind of embodiment of the present invention.
1, up to 600 ℃, above hot direct reduced iron 1 is discharged in storage tank 2 temperature;
2, storage tank 2 is discharged into hot direct-reduced iron 1 in bucket machine 4;
3, hot direct-reduced iron 1 is transported to electric furnace shop by bucket machine 4, and be discharged in furnace roof transition batch can 5;
4, award material elephant trunk 6 and rotate to and add material level, furnace roof transition batch can 5 packs hot direct reduced iron 1 in electric furnace 7 into by awarding material elephant trunk 6.
Claims (4)
1. one kind adopts the method for bucket machine hot charging direct-reduced iron, it is characterized in that, technique is: first, hot direct reduced iron is discharged in storage tank, then by bucket machine, hot direct reduced iron be transported to electric furnace shop and be discharged in furnace roof transition batch can, then joining in electric furnace through awarding material elephant trunk;
The storage hot direct reduced iron of described storage tank is also controlled electric furnace material loading amount, and storage tank inwall is built heat-resistant insulation material by laying bricks or stones, to reduce hot direct reduced iron heat lost by radiation, is full of rare gas element to prevent the secondary oxidation of hot direct reduced iron in storage tank;
The angle of described bucket machine can be according to the altitude mixture control of direct-reduced iron production unit, and bucket machine is made up of thermal insulation material, to reduce the temperature drop of direct-reduced iron; Meanwhile, the vestibule of bucket machine is closed, and the logical protection of inert gas of bucket machine of vestibule inside, prevents the oxidation of hot direct reduced iron;
Described furnace roof transition batch can is for storing the hot direct reduced iron of electric furnace non-feed time in the time overhauling or in smelting cycle, and adjusting feed rate; Furnace roof transition batch can has two, is positioned at electric furnace top, and the storage capacity of each furnace roof transition batch can meet electric furnace and complete the required material quantity of primary smelting; In furnace roof transition batch can, be full of rare gas element and prevent direct-reduced iron oxidation, inside is built heat-resistant insulation material by laying bricks or stones simultaneously, reduces the temperature drop of direct-reduced iron.
2. method according to claim 1, is characterized in that: described hot direct reduced iron is produced by gas-based shaft kiln MIDREX method or other method.
3. method according to claim 1, is characterized in that: described awarding expects that elephant trunk is rotary, awards material elephant trunk and adopts gas cooling.
4. method according to claim 1, is characterized in that: the temperature of described described hot direct reduced iron is more than 600 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410067369.4A CN103805727B (en) | 2014-02-26 | 2014-02-26 | A kind of method adopting bucket machine hot charging direct-reduced iron |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410067369.4A CN103805727B (en) | 2014-02-26 | 2014-02-26 | A kind of method adopting bucket machine hot charging direct-reduced iron |
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| CN103805727A true CN103805727A (en) | 2014-05-21 |
| CN103805727B CN103805727B (en) | 2015-12-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106755693A (en) * | 2017-03-09 | 2017-05-31 | 江苏省冶金设计院有限公司 | Hot charging gas-based shaft kiln system and method |
| CN106834578A (en) * | 2017-01-09 | 2017-06-13 | 江苏省冶金设计院有限公司 | System and method associated with a kind of gas-based shaft kiln and electric furnace |
| CN115485397A (en) * | 2020-04-30 | 2022-12-16 | Sms集团有限公司 | Method for producing liquid pig iron from DRI products |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201187944Y (en) * | 2007-11-13 | 2009-01-28 | 四川龙蟒集团有限责任公司 | Conveying device of high temperature direct reduced iron |
| CN101565769A (en) * | 2009-06-03 | 2009-10-28 | 北京首钢国际工程技术有限公司 | Electric furnace sponge iron hot charging device and method thereof |
-
2014
- 2014-02-26 CN CN201410067369.4A patent/CN103805727B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201187944Y (en) * | 2007-11-13 | 2009-01-28 | 四川龙蟒集团有限责任公司 | Conveying device of high temperature direct reduced iron |
| CN101565769A (en) * | 2009-06-03 | 2009-10-28 | 北京首钢国际工程技术有限公司 | Electric furnace sponge iron hot charging device and method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106834578A (en) * | 2017-01-09 | 2017-06-13 | 江苏省冶金设计院有限公司 | System and method associated with a kind of gas-based shaft kiln and electric furnace |
| CN106755693A (en) * | 2017-03-09 | 2017-05-31 | 江苏省冶金设计院有限公司 | Hot charging gas-based shaft kiln system and method |
| CN115485397A (en) * | 2020-04-30 | 2022-12-16 | Sms集团有限公司 | Method for producing liquid pig iron from DRI products |
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| Publication number | Publication date |
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| CN103805727B (en) | 2015-12-02 |
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