CN103045860A - Pelletizing device and pelletizing method for layered wrapped non-homogeneous pellets - Google Patents
Pelletizing device and pelletizing method for layered wrapped non-homogeneous pellets Download PDFInfo
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- CN103045860A CN103045860A CN2013100038625A CN201310003862A CN103045860A CN 103045860 A CN103045860 A CN 103045860A CN 2013100038625 A CN2013100038625 A CN 2013100038625A CN 201310003862 A CN201310003862 A CN 201310003862A CN 103045860 A CN103045860 A CN 103045860A
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Abstract
The invention discloses a pelletizing device and a pelletizing method for layered wrapped non-homogeneous pellets. The pelletizing method comprises the steps of utilizing the pelletizing device, humidifying and uniformly mixing required inner layer mineral powder mixtures of the pellets, adding to an inner ring of a disk pelletizing machine, forming mother pellets with certain sizes after pelletizing, allowing the mother pellets to roll out of the inner ring of the disk and enter an outer ring of the disk, adding required outer layer mineral powder mixtures of the pellets to the outer ring, spraying for water replenishing, allowing the mother pellets to grow continuously in the outer ring, and forming the special pellets with different components on inner and outer layers to meet the production requirements.
Description
Technical field
The invention belongs to ferrous metallurgy pelletizing field, be specifically related to a kind of layering and wrap up in attached nonuniformity pelletizing palletizing device and pelletizing method.
Background technology
Acid pellet is the homogeneous pelletizing that makes by balling disc, is one of main iron-bearing material of blast furnace ironmaking.Because the variation of blast furnace raw material and the increase of production cost, new iron-smelting process such as direct-reduction, melting and reducing etc. receive much concern, and have obtained certain development.These techniques differ to the pelletizing feed performance requriements, and the iron-smelting process that has requires the outer layered material of pelletizing to have singularity, and is low such as outer material fusing point height or fusing point, and the iron-smelting process that has requires outer layered material to join charcoal amount and interior layered material to join the charcoal amount and differ.
The rotary hearth furnace direct-reduction makes the pearl iron process, green pellets obtains pearl iron through high temperature rotary hearth furnace direct-reduction, there is the variation of solid liquid phase in pelletizing in this process, become liquid phase to build up such as iron and grow up, and slag is still solid phase, owing to rotary hearth furnace temperature reason, need green-ball to have the advantages that ectonexine character differs, but owing at present no matter be disk pelletizing or pair roller pressure ball, all be that batch mixing evenly obtains homogeneous pelletizing, can not satisfy obtaining the requirement of pearl iron process.
Summary of the invention
For adapting to the demand of iron-smelting process, the invention provides a kind of layering and wrap up in attached nonuniformity pelletizing palletizing device and pelletizing method.Application by this method can obtain the pelletizing that the ectonexine composition differs, and to adapt to the demand of special pelletizing feed, can reach the purpose that reduces raw materials cost simultaneously, reduces the loss of unnecessary charcoal.
Described palletizing device improves based on existing pelletizer, comprise balling disk (-sc), inner ring, outer shroud, scrape frame, scraper, described inner ring and described outer shroud are the donuts on same balling disk (-sc) plane, the described frame of scraping links to each other with described scraper, described scraper comprises inner ring scraper and outer shroud scraper, described inner ring scraper is positioned at inner ring, and described outer shroud scraper is between inner ring and outer shroud; Described inner ring height is less than the outer shroud height.
Optionally, described balling disk (-sc) inclination angle is 35-50 °.
Optionally, described inner ring height and described disk outer shroud aspect ratio are 1/4～2/3, and described inner ring radius and described outer shroud radius ratio are 1/4～3/4, and described outer shroud height is 0.1～0.13 with described outer ring diameter ratio.
Optionally, describedly scrape frame and scraper is steel material, scrape frame and be connected with the pelletizing body, two surfaces of scraper reinforce respectively the bigger vulcanite of one deck size, make rubber play the scraper effect, reduce the rigidity friction of scraper and disk.
Optionally, described device also comprises the atomizing hydraulic giant, described atomizing hydraulic giant with link to each other with outer waterworks, the top of described inner ring and described outer shroud is respectively equipped with the atomizing hydraulic giant, described atomizing hydraulic giant is along disk diameter to water spray.
It is as follows to utilize pelletizer to carry out the method for pelletizing:
1) pelletizing internal layer mineral powder mixed material is joined after evenly in the middle of the disk balling disk (-sc) through humidification, mix, obtain the mother bulb of desired size through pelletizing.
The mother bulb that 2) will reach desired size rolls out the disk inner ring by centrifugation, enters the disk outer shroud, in outer shroud, pass through to add the outer mineral powder mixed material of required pelletizing, and the spraying humidification mother bulb, mother bulb is grown up gradually, forms to have the special pelletizing that the ectonexine composition differs.
Optionally, described internal layer mineral powder mixed material granularity accounts for more than 70% less than 200 orders less than 80 orders.
Optionally, described internal layer mineral powder mixed material moisture control is at 8%-12%.
Optionally, described mother bulb size is according to special pelletizing feed performance requriements, by control feed rate and disc rotation speed, increases or reduces the mother bulb size, thereby reduce or increase the pelletizing outer layer thickness.
Optionally, described outer mineral powder mixed material granularity control is consistent with the internal layer mineral powder mixed material, and moisture control is at 6-10%.Described internal layer mineral powder mixed material and outer mineral powder mixed material composition batching are different, prepare burden according to required pelletizing performance.
Utilize device of the present invention and pelletizing method can obtain the nonuniformity pelletizing, add low melting point such as the pelletizing internal layer, make the iron liquid that generates in the reduction process shape balling iron of in liquid state, growing up as early as possible, and the top layer wishes that fusing point is high, make the interior pelletizing top layer of stove be solid-state, pelletizing is non-caked each other.Simultaneously because this technology application, join the different nonuniformity pelletizing of charcoal amount so that can obtain ectonexine, to adapt to the demand of special pelletizing feed, simultaneously some the time can reach the purpose that reduces raw materials cost, join according to demand the charcoal amount such as ectonexine and differ, will reduce the loss that causes unnecessary charcoal because of the homogeneous pelletizing like this.
Description of drawings
Fig. 1 is that attached nonuniformity pelletizing pelletizing disk vertical view is wrapped up in a kind of layering.
Fig. 2 is that attached nonuniformity pelletizing pelletizing disk A-A face sectional view is wrapped up in a kind of layering.
The accompanying drawing mark:
1, water fog nozzle, 2, scrape frame, 3, scraper, 4, balling disk (-sc), 5, vulcanite, 6, outer shroud, 7, inner ring.
Embodiment
The invention provides a kind of layering and wrap up in attached nonuniformity pelletizing pelletizing disk, the invention will be further described below in conjunction with accompanying drawing and embodiment, but be not limited to this.
Embodiment 1:
As shown in Figure 1, this palletizing device improves based on existing pelletizer, comprises balling disk (-sc) 4, inner ring 7, outer shroud 6, scrapes frame 2, scraper 3.As shown in Figure 2, inner ring 7 is the donuts on same balling disk (-sc) plane with outer shroud 6, scrapes frame 2 and links to each other with scraper 3, and scraper 3 comprises inner ring scraper and outer shroud scraper, and the inner ring scraper is positioned at inner ring 7, and the outer shroud scraper is between inner ring 7 and outer shroud 6; Inner ring 7 height are less than outer shroud 6 height.Balling disk (-sc) 4 inclination angles are 35-50 °.Inner ring 7 height are 1/4～2/3 with disk outer shroud 6 aspect ratios, and inner ring 7 radiuses and outer shroud 6 radius ratios are 1/4～3/4, and outer shroud 7 height are 0.1～0.13 with outer shroud 6 diameters ratio.
This device also comprises water fog nozzle 1, water fog nozzle 1 with link to each other with outer waterworks, inner ring 7 is respectively equipped with atomizing hydraulic giant 1 with the top of outer shroud 6, water fog nozzle 1 is along disk diameter to water spray.
Granularity is accounted for 72% internal layer mineral powder mixed material less than 80 purposes, particle diameter less than 200 orders evenly mixes, humidification control compound moisture content is 8% in the mix process, be added to pelletizing disk inner ring and make mother bulb, the pelletizing process is looked the balling-up situation and is sprayed and add water, because centrifugation, the certain size mother bulb rolls out mother bulb and generates district's (inner ring), enters the district's (outer shroud) of growing up.Outer mineral powder mixed material granularity-80 order accounts for 100% ,-200 orders and accounts for 75%, control moisture content is 6% after evenly mixing, at the uniform velocity join the district of growing up, and mother bulb spraying added water, impel growing up of pelletizing, reinforced and the velocity of rotation of control, to obtain the pelletizing of required size, gained green-ball index meets technical requirements.
Embodiment 2:
Identical with embodiment 1, just the pelletizing disk tilt angle changes 50 ° into, and the outer shroud radius becomes 1.2m, and the inner ring radius is 0.9m, and disk outer shroud height is 0.25m, and the inner ring height is 0.16m.Gained green-ball index meets technical requirements.
Embodiment 3:
Identical with embodiment 2, just internal layer mineral powder mixed material granularity-80 order accounts for 100%, and-200 orders account for 80%, and compound moisture content is 12%, and outer mineral powder mixed material granularity-80 order accounts for 100%, and-200 orders account for 76%, and the compound moisture control is 10%.Gained green-ball index meets technical requirements.
Claims (11)
1. attached nonuniformity pelletizing palletizing device is wrapped up in a layering, it is characterized in that, described device comprises balling disk (-sc), inner ring, outer shroud, scrapes frame and scraper, described inner ring and described outer shroud be positioned on the balling disk (-sc) donut, the described frame of scraping links to each other with described scraper, described scraper comprises inner ring scraper and outer shroud scraper, and described inner ring scraper is positioned at inner ring, and described outer shroud scraper is between inner ring and outer shroud; Described inner ring height is less than the outer shroud height.
2. device according to claim 1 is characterized in that, described balling disk (-sc) inclination angle is 35-50 °.
3. device according to claim 1, it is characterized in that, described inner ring height and described outer shroud aspect ratio are 1/4～2/3:1, and described inner ring radius and described outer shroud radius ratio are at 1/4～3/4:1, and described outer shroud height is 0.1～0.13:1 with described outer ring diameter ratio.
4. device according to claim 1 is characterized in that, describedly scrapes frame and described scraper is steel material, and described blade surface is wrapped with vulcanite, and described vulcanite plays the scraper effect, and reduces the rigidity friction of scraper and described balling disk (-sc).
5. device according to claim 1, it is characterized in that described device also comprises the atomizing hydraulic giant, described atomizing hydraulic giant with link to each other with outer waterworks, described inner ring and described outer shroud top are respectively equipped with the atomizing hydraulic giant, and described atomizing hydraulic giant is radially sprayed water along balling disk (-sc).
6. one kind is utilized the arbitrary device of claim 1～5 to prepare the method that attached nonuniformity pelletizing is wrapped up in layering, and the method comprises:
1) pelletizing internal layer mineral powder mixed material is joined after evenly in the middle of the balling disk (-sc) through humidification, mix, obtain the mother bulb of desired size through pelletizing.
2) mother bulb that reaches desired size rolls out the disk inner ring by centrifugation, enters the disk outer shroud, in outer shroud, pass through to add the outer mineral powder mixed material of required pelletizing, and the spraying humidification mother bulb, mother bulb is grown up gradually, forms to have the special pelletizing that the ectonexine composition differs.
7. method according to claim 6 is characterized in that, described internal layer mineral powder mixed material granularity is less than 80 orders, and granularity accounts for more than 70% less than 200 orders.
8. method according to claim 6 is characterized in that, described internal layer mineral powder mixed material moisture control is at 8%-12%.
9. method according to claim 6 is characterized in that, described method also comprises by control feed rate and disc rotation speed, increases or reduces the mother bulb size, thereby reduce or increase the pelletizing outer layer thickness.
10. method according to claim 6 is characterized in that, described outer mineral powder mixed material granularity is consistent with the internal layer mineral powder mixed material, and water content is 6-10%.
11. method according to claim 6 is characterized in that, described outer mineral powder mixed material and internal layer mineral powder mixed material are prepared burden according to the pelletizing performance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310003862.5A CN103045860B (en) | 2013-01-06 | 2013-01-06 | Pelletizing device and pelletizing method for layered wrapped non-homogeneous pellets |
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| CN201310003862.5A CN103045860B (en) | 2013-01-06 | 2013-01-06 | Pelletizing device and pelletizing method for layered wrapped non-homogeneous pellets |
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| CN103045860B CN103045860B (en) | 2014-03-26 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099466A (en) * | 2014-07-09 | 2014-10-15 | 河北钢铁股份有限公司邯郸分公司 | Production method of bilayer structure pellet and production equipment thereof |
| CN105886689A (en) * | 2016-05-03 | 2016-08-24 | 重庆大学 | Pellet coating material and anti-bonding method in metalized roasting process |
| CN106350660A (en) * | 2016-11-29 | 2017-01-25 | 江苏省冶金设计院有限公司 | Method for preparing full-vanadium-titanium pellets |
| CN106582443A (en) * | 2017-01-17 | 2017-04-26 | 东莞深圳清华大学研究院创新中心 | Disc granulator |
| CN112870219A (en) * | 2021-01-20 | 2021-06-01 | 荆门千年健医疗保健科技有限公司 | Gypsum pill, preparation method thereof and gypsum pill pillow |
| CN113278793A (en) * | 2021-04-19 | 2021-08-20 | 昆明理工大学 | Layered ore blending method for pellet ore |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5931834A (en) * | 1982-08-12 | 1984-02-21 | Sumitomo Metal Ind Ltd | Production of sintered ore |
| CN201921656U (en) * | 2011-01-20 | 2011-08-10 | 嵇建国 | Special vertical uniform mixing equipment for pelletizing of organic binder |
| CN203080031U (en) * | 2013-01-06 | 2013-07-24 | 莱芜钢铁集团有限公司 | Hierarchically-wrapped non-homogeneous pellet making device |
-
2013
- 2013-01-06 CN CN201310003862.5A patent/CN103045860B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5931834A (en) * | 1982-08-12 | 1984-02-21 | Sumitomo Metal Ind Ltd | Production of sintered ore |
| CN201921656U (en) * | 2011-01-20 | 2011-08-10 | 嵇建国 | Special vertical uniform mixing equipment for pelletizing of organic binder |
| CN203080031U (en) * | 2013-01-06 | 2013-07-24 | 莱芜钢铁集团有限公司 | Hierarchically-wrapped non-homogeneous pellet making device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099466A (en) * | 2014-07-09 | 2014-10-15 | 河北钢铁股份有限公司邯郸分公司 | Production method of bilayer structure pellet and production equipment thereof |
| CN104099466B (en) * | 2014-07-09 | 2016-01-20 | 河北钢铁股份有限公司邯郸分公司 | A kind of manufacture method of bilayer structure pelletizing and production unit |
| CN105886689A (en) * | 2016-05-03 | 2016-08-24 | 重庆大学 | Pellet coating material and anti-bonding method in metalized roasting process |
| CN106350660A (en) * | 2016-11-29 | 2017-01-25 | 江苏省冶金设计院有限公司 | Method for preparing full-vanadium-titanium pellets |
| CN106582443A (en) * | 2017-01-17 | 2017-04-26 | 东莞深圳清华大学研究院创新中心 | Disc granulator |
| CN112870219A (en) * | 2021-01-20 | 2021-06-01 | 荆门千年健医疗保健科技有限公司 | Gypsum pill, preparation method thereof and gypsum pill pillow |
| CN113278793A (en) * | 2021-04-19 | 2021-08-20 | 昆明理工大学 | Layered ore blending method for pellet ore |
| CN113278793B (en) * | 2021-04-19 | 2022-02-18 | 昆明理工大学 | Layered ore blending method for pellet ore |
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| CN103045860B (en) | 2014-03-26 |
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