CN1051759A - Method for manufacturing return ore core pellet - Google Patents
Method for manufacturing return ore core pellet Download PDFInfo
- Publication number
- CN1051759A CN1051759A CN 90109395 CN90109395A CN1051759A CN 1051759 A CN1051759 A CN 1051759A CN 90109395 CN90109395 CN 90109395 CN 90109395 A CN90109395 A CN 90109395A CN 1051759 A CN1051759 A CN 1051759A
- Authority
- CN
- China
- Prior art keywords
- pellet
- ball
- pelletizing
- water
- ores
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000008188 pellet Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000005453 pelletization Methods 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 239000012141 concentrate Substances 0.000 claims abstract description 6
- 239000011362 coarse particle Substances 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000009736 wetting Methods 0.000 abstract description 5
- 229910000278 bentonite Inorganic materials 0.000 abstract description 3
- 239000000440 bentonite Substances 0.000 abstract description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005054 agglomeration Methods 0.000 abstract description 2
- 230000002776 aggregation Effects 0.000 abstract description 2
- 230000006911 nucleation Effects 0.000 abstract 1
- 238000010899 nucleation Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000012256 powdered iron Substances 0.000 description 2
- 208000035126 Facies Diseases 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention belongs to the field of iron ore powder agglomeration, and is characterized by that the pellet return ore can be directly added into the raw material to make pelletizing to produce pellet ore. Firstly, wetting pellet return ores by water, wherein the water content is 6-10%, so that coarse particles in the return ores have a nucleation function, and then mixing the pellet return ores with iron concentrate powder, bentonite and the like for pelletizing; in order to ensure that the green pellets can grow continuously in the pelletizing process, the water adding mode in the pelletizing process is atomized water, the quality of the green pellets obtained by the invention can completely meet the production requirement of the shaft furnace, pellet return ores can be adopted to replace part of iron ore concentrate, finished pellet ores cannot be influenced, and closed cycle of pellet-return ores-re-pellets can be completely realized.
Description
The invention belongs to the iron mineral powder agglomeration technical field.
At present, the pelletizing powder (5 millimeters often are called and return mine) that palletizing shaft furnace produces generally only is used for agglomerate production because granularity is thicker, if be used for producing pellet, then must can use to the fine ore granular level through ball mill etc. is levigate again.
Japanese patent application J63-130720 discloses a kind of powder material pelletizing manufacture method, be to make the ball difficult problem in order to solve special mineral fine (≤325 orders account for 80%), this method is earlier breeze to be made bead as ball (diameter is φ 4～6mm), (size φ 15～20mm) to mix the green-ball of making the granularity that meets the demands in the back with the mineral fine of same composition with this bead again, the feature of this application is through two steps with same raw material, make ball earlier, the production pellet is mixed in the back with breeze.
The objective of the invention is to obtain a kind of pelletizing can being returned mine and directly produce the method for pellet as ball.
For achieving the above object, coarse particles during the present invention is achieved in that pelletizing returned mine is as the ball of making ball, in advance above-mentioned ball is added water-wet, moisture content is 6～10wt%, can make the coarse particles (〉=3 millimeters) in returning mine possess into kernel function like this, mix with iron ore concentrate, bentonite etc. then, wherein moist curing is crossed returns mine that to account for proportioning raw materials be 1～10wt%, makes ball.
Can constantly grow up for guaranteeing to make in the ball process green-ball, the water mode of making in the ball process that adds is an atomized water.
Among the present invention, its key is that the water that is at first pelletizing to be returned mine is moistening, makes it to possess into kernel function, makes ball with powdered iron ore etc. then.Coarse particles in returning mine for pelletizing, if not wetting in advance just the mixing with powdered iron ore participates in making ball, although in making the ball process, can add moisture content, the particle of returning mine still can not participate in making ball, do not possess into kernel function, therefore, people think always that pelletizing returns mine to have only to be refined to iron ore concentrate granulometric facies same level through ball milling and just can participate in making ball.The present invention is because the particle water-wet of will returning mine in advance, and water content is 6～10%, and moisture content is very few can not to reach wetting purpose, too highly then influences the whole ball process of making.The particle of returning mine is like this made in the ball process in participation, because the capillary effect of water just can combine with fine iron breeze; Can constantly grow up for guaranteeing to make in the ball process green-ball, the water mode of making in the ball process that adds is an atomized water.
Compared with the prior art, the present invention is owing to saved the levigate process of returning mine, can save facility investment, processing charges etc., the more important thing is, having overcome in the prior art pelletizing returns mine and can not participate in the prejudice of making ball directly, the available instead of part fine iron breeze of returning mine, and realized pelletizing-return mine-closed cycle of pelletizing again.
Introduce embodiments of the invention below.
Raw materials usedly in the present embodiment return mine for iron ore concentrate, bentonite, pelletizing, its size composition such as table 1 show.Balling equipment is respectively among the φ 1000mm(embodiment 2,3,4 and is laboratory test) and φ 4200mm(embodiment in 5 be industrialness production) balling disc.
It is wetting by 6%, 8%, 10% moisture content respectively in advance pelletizing to be returned mine, participate in by 5%, 10% proportioning raw materials respectively then and make ball, make that to add the water mode in the ball process be atomized water, the green-ball of making is done finished ball quality test after quality of green pellets check and the roasting respectively, result such as table 2 show.
The result shows that the not low original split pellet quality level of the pellet quality that adopts the technology of the present invention to obtain satisfies the blast furnace production requirement fully.Simultaneously, adopt the technology of the present invention then can cancel the pelletizing regrinding process of returning mine, whenever utilize one ton of pelletizing to return mine to save 50 yuan, the remarkable in economical benefits of bringing.
Table 2 experimental result
| Original technology | The embodiment of the invention | |||||
| Sequence number | 1 | 2 | 3 | 4 | 5※※ | |
| Do not grind the proportioning (%) of returning mine | 10※ | 5 | 5 | 10 | 10 | |
| Do not grind the wetting moisture content (%) of returning mine | 6 | 10 | 8 | 8 | ||
| Quality of green pellets | Ultimate compression strength (newton /) | 14.3 | 11.1 | 14.7 | 14.3 | 14.2 |
| Dropping strength (inferior /) | 4.4 | 3.8 | 3.9 | 4.0 | 4.8 | |
| Burst temperature (℃) | ＞800 | ＞800 | ＞800 | ＞800 | ＞800 | |
| The finished ball quality | Ultimate compression strength (newton /) | 1781 | 2705 | 3193 | 3028 | 1797 |
| Barrate strength (%) | 84.9 | 85.9 | ||||
| Screening index (%) | 2.4 | 2.4 | ||||
※ is pelletizing return mine (200, account for 60%) after ball mill is regrinded.
※ ※ is the industrial production actual result.
Claims (2)
1, a kind of production of pellet with reveert as core is iron ore concentrate, moisture and ball to be mixed to participate in make the ball process, and it is characterized in that: described ball is the coarse particles during pelletizing is returned mine, and in advance this ball is added water-wet.
2, production of pellet with reveert as core according to claim 1 is characterized in that: the water mode that adds in making the ball process is an atomized water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90109395A CN1019819B (en) | 1990-11-27 | 1990-11-27 | Method for manufacturing return ore core pellet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90109395A CN1019819B (en) | 1990-11-27 | 1990-11-27 | Method for manufacturing return ore core pellet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1051759A true CN1051759A (en) | 1991-05-29 |
| CN1019819B CN1019819B (en) | 1992-12-30 |
Family
ID=4881410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90109395A Expired CN1019819B (en) | 1990-11-27 | 1990-11-27 | Method for manufacturing return ore core pellet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019819B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074485A (en) * | 2013-02-06 | 2013-05-01 | 武汉科技大学 | Preparation method of oxidized pellets with coarse-grain hematite as main raw material |
| CN104975169A (en) * | 2014-04-10 | 2015-10-14 | 鞍钢股份有限公司 | Method for improving air permeability of sintering mixture |
| CN105441669A (en) * | 2016-01-13 | 2016-03-30 | 山西太钢不锈钢股份有限公司 | Method of improving air permeability of fully refined powder sintered material layer |
| CN113789440A (en) * | 2021-09-28 | 2021-12-14 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of vanadium-titanium pellet ore |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055092C (en) * | 1998-01-20 | 2000-08-02 | 张永正 | Preparation of gluconic acid by hydrogen peroxide oxidizing process |
| CN1319930C (en) * | 2004-07-11 | 2007-06-06 | 昆明贵金属研究所 | Preparation method of gluconic acid and its salt |
| CN104073627B (en) * | 2013-03-27 | 2016-11-23 | 鞍钢股份有限公司 | Production method of fluxed composite pellet |
-
1990
- 1990-11-27 CN CN90109395A patent/CN1019819B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074485A (en) * | 2013-02-06 | 2013-05-01 | 武汉科技大学 | Preparation method of oxidized pellets with coarse-grain hematite as main raw material |
| CN104975169A (en) * | 2014-04-10 | 2015-10-14 | 鞍钢股份有限公司 | Method for improving air permeability of sintering mixture |
| CN104975169B (en) * | 2014-04-10 | 2017-05-24 | 鞍钢股份有限公司 | Method for improving air permeability of sintering mixture |
| CN105441669A (en) * | 2016-01-13 | 2016-03-30 | 山西太钢不锈钢股份有限公司 | Method of improving air permeability of fully refined powder sintered material layer |
| CN113789440A (en) * | 2021-09-28 | 2021-12-14 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of vanadium-titanium pellet ore |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1019819B (en) | 1992-12-30 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application |