CN103482265B - A kind of method preventing hot metal pellet to be oxidized in batch can - Google Patents
A kind of method preventing hot metal pellet to be oxidized in batch can Download PDFInfo
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- CN103482265B CN103482265B CN201310438534.8A CN201310438534A CN103482265B CN 103482265 B CN103482265 B CN 103482265B CN 201310438534 A CN201310438534 A CN 201310438534A CN 103482265 B CN103482265 B CN 103482265B
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- oxidized
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Abstract
The invention discloses a kind of method preventing hot metal pellet to be oxidized in batch can, wherein, described batch can comprises cover, can body, at the bottom of tank and suspension rod, described suspension rod is connected with at the bottom of tank, at the bottom of described tank can along can body move axially and opening and closing of fault by the annular drain hole formed with can body at the bottom of tank, the outer wall of described can body arranges blowing fangs to make can body be supported when blowing, the support ring described batch can being placed in support platform forms additional seal chamber, described additional seal chamber is by support platform, support ring and blowing fangs surround and described annular drain hole is positioned at additional seal chamber.The present invention can only have rare gas element to enter by the annulus controlled bottom batch can, thus avoids reoxidizing of the hot metal pellet in batch can, makes reduction achievement obtain consolidating preservation, for the stable of whole production line provides technical support.
Description
Technical field
The invention belongs to the production technical field of steel industry metallized pellet (or direct-reduction), more particularly, be specifically related to one and avoid as-reduced hot metal pellet to come out of the stove the method reoxidized after (kiln).
Background technology
The structure of existing hot metal pellet splendid attire batch can as illustrated in figs. ia and ib.Fig. 1 a is the splicing state of batch can, and now cover is opened, and whole batch can directly supports by the bottom of tank, is placed on table top at the bottom of tank, and can body is combined at the bottom of tank under gravity, and the drain hole formed at the bottom of tank and between can body is closed; Fig. 1 b is the blowing state of batch can, and now cover is closed, and the blowing fangs on batch can tank body is supported, unsettled at the bottom of tank, and the drain hole formed at the bottom of tank and between can body is opened.Bottom this needed for technique, the batch can structure of blowing certainly exists annulus when drain hole is closed, and therefore this batch can in use there will be following situation:
As shown in Figure 2, after batch can loads the hot metal pellet after reduction, because tank underseal closes imprecision, under the effect of chimneyeffect, in tank, tank mouth is risen to loose excessive by the gas that pelletizing heats, freezing air enters from the annulus at the bottom of tank, and produce oxidizing reaction after hot metal pellet runs in air oxygen, and release a large amount of heat, freezing air is caused to enter from the annulus at the bottom of tank continuously, then overflow from tank mouth is loose continuously by the gas of reaction heating, metallized pelletizing is caused again to carry on the back oxidation, and temperature in batch can is higher, the wind-drawing effect of chimneyeffect is larger, the speed that metallized pellet again be oxidized is also faster, sometimes the rate that reoxidizes of metallized pellet is even more than 50%, this greatly affects production results and increases production cost.
Summary of the invention
In order to solve the deficiencies in the prior art, the object of the present invention is to provide a kind of method that the metallized pellet in batch can be avoided to again be oxidized.
To achieve these goals, the invention provides the method preventing hot metal pellet to be oxidized in batch can, wherein, described batch can comprises cover, can body, at the bottom of tank and suspension rod, described suspension rod is connected with at the bottom of tank, at the bottom of described tank can along can body move axially and opening and closing of fault by the annular drain hole formed with can body at the bottom of tank, the outer wall of described can body arranges blowing fangs to make can body be supported when blowing, the support ring described batch can being placed in support platform forms additional seal chamber, described additional seal chamber is by support platform, support ring and blowing fangs surround and described annular drain hole is positioned at additional seal chamber.
According to an embodiment of the method preventing hot metal pellet to be oxidized in batch can of the present invention, gasket is set between described support ring and blowing fangs.
According to an embodiment of the method preventing hot metal pellet to be oxidized in batch can of the present invention, described gasket is aluminosilicate fiberboard or alumina silicate fibre blanket.
According to an embodiment of the method preventing hot metal pellet to be oxidized in batch can of the present invention, described support ring arranges inert gas duct, in described additional seal chamber, fill rare gas element and keep slight positive pressure state.
According to an embodiment of the method preventing hot metal pellet to be oxidized in batch can of the present invention, described rare gas element is nitrogen or helium.
According to an embodiment of the method preventing hot metal pellet to be oxidized in batch can of the present invention, the described annular drain hole by being formed with can body at the bottom of tank is annulus when closed, before hot metal pellet is put into batch can, first lay carbon containing bulk cargo at described annulus place.
The present invention can only have rare gas element to enter by the annulus controlled bottom batch can, thus avoids reoxidizing of the hot metal pellet in batch can, makes reduction achievement obtain consolidating preservation, for the stable of whole production line provides technical support.
Accompanying drawing explanation
Fig. 1 a is the splicing status architecture schematic diagram of batch can.
Fig. 1 b is the blowing status architecture schematic diagram of batch can.
Structural representation when Fig. 2 is batch can splendid attire metallized pellet.
Fig. 3 is batch can structural representation when using the method preventing hot metal pellet to be oxidized in batch can of the present invention.
Description of reference numerals:
At the bottom of 1-can body, 2-tank, 3-suspension rod, 4-blowing fangs, 5-cover, 6-gasket, 7-annulus, 8-additional seal chamber, 9-rare gas element access tube, 10-metallized pellet, 11-carbon containing bulk cargo, 12-support platform, 13-support ring.
Embodiment
Below, exemplary embodiment of the present invention is described in detail with reference to accompanying drawing.
Fig. 3 is batch can structural representation when using the method preventing hot metal pellet to be oxidized in batch can of the present invention.As shown in Figure 3, the batch can in the present invention to comprise at the bottom of cover 5, can body 1, tank 2 and suspension rod 3, and suspension rod 32 to be connected with at the bottom of tank, such as with bolts the or mode that is welded to connect.And, at the bottom of tank 2 can along can body 1 move axially and opening and closing of fault by the 2 annular drain holes formed with can body 1 at the bottom of tank, the outer wall of can body 1 arranges blowing fangs 4 to make can body 1 be supported when blowing, as shown in Figure 1 b, when the blowing fangs 4 of can body 1 is by supporting, at the bottom of tank 2 can be unsettled and open annular drain hole and carry out blowing.Meanwhile, suspension rod 3 can play a part at the bottom of restriction tank 2 excessively descending, particularly, suspension rod 3 do not stretch out cover 5 with 2 one end be connected at the bottom of tank, and this one end is stub end, and the lateral dimension of this stub end is greater than the diameter of the suspension rod passing hole on cover 5.
Because at the bottom of tank, 2 have up-small and down-big frustum cone structure as shown in Figure 3, therefore, when upwards pulling suspension rod 3 and after driving at the bottom of tank 2 to move up, then the annular drain hole at the bottom of closed container between 2 and can body 1; And when promote downwards suspension rod 3 or at the bottom of tank 2 and material action of gravity under, at the bottom of tank 2 move down after, then open the annular drain hole at the bottom of tank between 2 and can body 1, realize splicing and blowing thus.But due to annular drain hole close after still there is annulus 7, air easily to be entered in batch can by annulus 7 and causes the metallized pellet in batch can to again be oxidized.
Concrete scheme of the present invention is: the support ring 13 batch can being placed in support platform 12 forms additional seal chamber 8, this additional seal chamber 8 to be surrounded by support platform 12, support ring 13 and blowing fangs 4 and annular drain hole is positioned at additional seal chamber 8, the annulus 7 thus achieved at the bottom of batch can tank is enclosed in a little relatively airtight space, effectively prevents air from entering batch can and oxidation to metallized pellet.
In order to prevent air from entering between the blowing fangs 4 and the contact surface of supporting cup 13 of batch can and continuing to enter batch can further, rare gas element access tube 9 can also be set on supporting cup 13, then in additional seal chamber 8, fill rare gas element by rare gas element access tube 9 and make additional seal chamber 8 remain on slight positive pressure state, more ensure that the sealed state in additional seal chamber 8 thus.Rare gas element can be nitrogen, helium etc.
Again preferably, in order to improve the stopping property in additional seal chamber 6 further, can also arrange gasket 6 between support ring 13 and blowing fangs 4, gasket is aluminosilicate fiberboard or alumina silicate fibre blanket etc.
Enter from the annulus 7 at the bottom of tank to prevent a small amount of oxygen, further preferred measure is that the annulus 7 at the bottom of tank lays one deck carbon containing bulk cargo 11 in advance, when there being a small amount of oxygen to enter in tank from annulus 7, first pass through by the warmed-up carbon containing bulk cargo 11 of hot metal pellet, then first oxygen react with carbon containing bulk cargo 11 and generate CO
2or CO, thus the oxidation to hot metal pellet can not be formed.
In sum; the present invention by arranging the annular seal space being full of rare gas element bottom batch can; under making the annulus at the bottom of batch can tank be in inert gas atmosphere, thus prevent from air from entering in batch can being again oxidized hot metal pellet, be conducive to protection and produce product and reduce production cost.
Although specifically describe the present invention, those skilled in the art will appreciate that without departing from the spirit and scope of the present invention, various forms of change can be made to the present invention.
Claims (4)
1. the method preventing hot metal pellet to be oxidized in batch can, wherein, described batch can comprises cover, can body, at the bottom of tank and suspension rod, described suspension rod is connected with at the bottom of tank, at the bottom of described tank can along can body move axially and opening and closing of fault by the annular drain hole formed with can body at the bottom of tank, the outer wall of described can body arranges blowing fangs to make can body be supported when blowing, it is characterized in that, the support ring described batch can being placed in support platform forms additional seal chamber, described additional seal chamber is by support platform, support ring and blowing fangs surround and described annular drain hole is positioned at additional seal chamber, described support ring arranges rare gas element and passes into pipeline, in described additional seal chamber, fill rare gas element and keep slight positive pressure state, the described annular drain hole by being formed with can body at the bottom of tank is annulus when closed, before hot metal pellet is put into batch can, first lay carbon containing bulk cargo at described annulus place.
2. the method preventing hot metal pellet to be oxidized in batch can according to claim 1, is characterized in that, between described support ring and blowing fangs, arrange gasket.
3. the method preventing hot metal pellet to be oxidized in batch can according to claim 2, is characterized in that, described gasket is aluminosilicate fiberboard or alumina silicate fibre blanket.
4. the method preventing hot metal pellet to be oxidized in batch can according to claim 1, is characterized in that, described rare gas element is nitrogen or helium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310438534.8A CN103482265B (en) | 2013-09-24 | 2013-09-24 | A kind of method preventing hot metal pellet to be oxidized in batch can |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310438534.8A CN103482265B (en) | 2013-09-24 | 2013-09-24 | A kind of method preventing hot metal pellet to be oxidized in batch can |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103482265A CN103482265A (en) | 2014-01-01 |
| CN103482265B true CN103482265B (en) | 2015-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310438534.8A Expired - Fee Related CN103482265B (en) | 2013-09-24 | 2013-09-24 | A kind of method preventing hot metal pellet to be oxidized in batch can |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3799367A (en) * | 1972-02-23 | 1974-03-26 | Thyssen Niederrhein Ag | Discharge system for a shaft-type furnace |
| CN86101529A (en) * | 1983-09-14 | 1988-02-17 | 新西兰钢铁公司 | The production of molten iron |
| CN101775488A (en) * | 2010-01-28 | 2010-07-14 | 北京科技大学 | Method for conveying thermal-state rotary furnace metallized pellets in anharmonic vibration mode |
| CN102041339A (en) * | 2010-12-30 | 2011-05-04 | 攀钢集团冶金工程技术有限公司 | Equipment and method for transferring thermal state directly reduced metal product |
| CN102941989A (en) * | 2012-10-29 | 2013-02-27 | 攀钢集团西昌钢钒有限公司 | Method for preventing bottom-opening alloy material tank from material blocking and retaining during unloading and material tank |
| CN103194560A (en) * | 2012-01-10 | 2013-07-10 | 攀钢集团研究院有限公司 | Transmission method of metallized pellet, sponge iron charging bucket and bunker of electric furnace |
| CN203048972U (en) * | 2012-12-17 | 2013-07-10 | 辽宁博联特冶金科技有限公司 | Wide-end-surface reduction furnace equipment for direct iron reduction |
-
2013
- 2013-09-24 CN CN201310438534.8A patent/CN103482265B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3799367A (en) * | 1972-02-23 | 1974-03-26 | Thyssen Niederrhein Ag | Discharge system for a shaft-type furnace |
| CN86101529A (en) * | 1983-09-14 | 1988-02-17 | 新西兰钢铁公司 | The production of molten iron |
| CN101775488A (en) * | 2010-01-28 | 2010-07-14 | 北京科技大学 | Method for conveying thermal-state rotary furnace metallized pellets in anharmonic vibration mode |
| CN102041339A (en) * | 2010-12-30 | 2011-05-04 | 攀钢集团冶金工程技术有限公司 | Equipment and method for transferring thermal state directly reduced metal product |
| CN103194560A (en) * | 2012-01-10 | 2013-07-10 | 攀钢集团研究院有限公司 | Transmission method of metallized pellet, sponge iron charging bucket and bunker of electric furnace |
| CN102941989A (en) * | 2012-10-29 | 2013-02-27 | 攀钢集团西昌钢钒有限公司 | Method for preventing bottom-opening alloy material tank from material blocking and retaining during unloading and material tank |
| CN203048972U (en) * | 2012-12-17 | 2013-07-10 | 辽宁博联特冶金科技有限公司 | Wide-end-surface reduction furnace equipment for direct iron reduction |
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|---|---|
| CN103482265A (en) | 2014-01-01 |
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Granted publication date: 20150930 Termination date: 20170924 |