CN104975170A - Fine iron ore concentrate pelletizing method free of binders - Google Patents
Fine iron ore concentrate pelletizing method free of binders Download PDFInfo
- Publication number
- CN104975170A CN104975170A CN201510314673.9A CN201510314673A CN104975170A CN 104975170 A CN104975170 A CN 104975170A CN 201510314673 A CN201510314673 A CN 201510314673A CN 104975170 A CN104975170 A CN 104975170A
- Authority
- CN
- China
- Prior art keywords
- iron ore
- water
- iron
- pelletizing
- ore concentrate
- 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.)
- Pending
Links
Abstract
The invention discloses a fine iron ore concentrate pelletizing method free of binders. The method comprises the following steps that water is added in fine iron ore concentrate with the iron grade greater than 65% and the grain size below 1.5 mm in advance, so that the water content of the fine iron ore concentrate is 9.76%; water is added for the second time before pelletizing, wherein water of 20 kg is added in each ton of fine iron ore concentrate again; pelletizing is conducted; the fine iron ore concentrate mixed with water in the previous step is conveyed to a pelletizer for manufacturing iron ore agglomerations; and roasting is conducted, and the iron ore agglomerations in the previous step are conveyed to a roaster to be preheated and roasted. Binders do not need to be added, only water needs to be added in the fine iron ore concentrate in advance to enable the water content of the fine iron ore concentrate to be 9.76%, then water of 20 kg is added in each ton of fine iron ore concentrate again before pelletizing, and the iron ore agglomerations can be manufactured without binders through two times of treatment on the fine iron ore concentrate before pelletizing and reasonable matching of the fine iron ore concentrate and water. Meanwhile, the iron content of the iron ore agglomerations is increased to be more than 62.7%, and the intensity of the iron ore agglomerations is high.
Description
Technical field
The present invention relates to a kind of Iron concentrate pelletizing process, be specifically related to a kind of Iron concentrate pelletizing process without the need to binding agent.
Background technology
At present, Iron concentrate all needs the balling-up of adding additives ability in balling process, what usual binding agent was all selected is clay, but in the iron ball utilizing pelletizing system to produce after adding clay group, comparison of ingredients is complicated, iron level is lower, the intensity causing iron ball to be rolled into a ball is low, in use easily damage, work-ing life is short, waste resource.How carrying iron level in high-iron-content pellet is people's urgent problems.In addition, existing pelletizing system is all just add water in Iron concentrate when pelletizing, is that Iron concentrate is comparatively thin, easily causes environmental pollution, injure the healthy of workman in pelletizing cause.
Summary of the invention
The object of the invention is to provide a kind of Iron concentrate pelletizing process without the need to binding agent, just need adding additives can make the technical problem that in iron ball group and iron ball group, iron level is low to solve the Iron concentrate existed in prior art.
In order to achieve the above object, the present invention is by the following technical solutions: a kind of Iron concentrate pelletizing process without the need to binding agent, comprises the following steps:
A, to add water in advance: Iron grade be greater than 65% and particle diameter be below 1.5mm Iron concentrate in add water in advance, make Iron concentrate self water content be 9.76%;
Before B, pelletizing, secondary adds water: in Iron concentrate per ton, again add water 20kg;
C, pelletizing: by step B, mixed Iron concentrate is transported in pelletizer and makes iron ball group with water;
D, roasting: the iron ball group in step C is transported to preheating in burning machine, roasting.
Further, in described step C, pelletizing diameter is 15-20mm.
Further, in described step D, preheating temperature is 600-700 degree Celsius, and maturing temperature is 1300-1500 degree Celsius.
Further, in described step D, warm up time is 10-15 minute, and roasting time is 10-15 minute.
Hinge structure of the present invention has following beneficial effect: Iron concentrate pelletizing process of the present invention does not need adding additives, only need add water in advance in Iron concentrate makes Iron concentrate self water content 9.76%, can ensure that Iron concentrate fully can mix with water on the one hand, make Iron concentrate can prevent dust from causing pollution on the environment and the injury to person health under moisture state on the other hand, then before granulation, in Iron concentrate per ton, water 20kg is again added, by the above-mentioned collocation to twice process of Iron concentrate and the reasonable amount of Iron concentrate and water before pelletizing, do not need to add binding agent when pelletizing and just can make iron ball group, simultaneously, improve the iron level in iron ball group, iron level during iron ball is rolled into a ball reaches more than 62.7%, the intensity of iron ball group is high, in use be not easy to damage, there is good economic benefit and application prospect.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
2.16 tons of ferrous grades are 66% and particle diameter is that the Iron concentrate of 1.4mm is as raw material, first in Iron concentrate, add 117kg water makes Iron concentrate self water content be 9.76%, then add water before pelletizing 43.2kg water again in Iron concentrate, to be transported in pelletizer with the mixed Iron concentrate of water and make iron ball group, again iron ball group is transported in burning machine and is 600 degrees Celsius of lower preheatings 15 minutes in temperature, is 1300 degrees Celsius of lower roastings 10 minutes in temperature, the complete iron pellet strength of roasting is 15MPa, and in iron ball group, iron level is 62.7%.
Embodiment 2
2.35 tons of ferrous grades are 68% and particle diameter is that the Iron concentrate of 1.2mm is as raw material, first in Iron concentrate, add 127kg water makes Iron concentrate self water content be 9.76%, then add water before pelletizing 47kg water again in Iron concentrate, to be transported in pelletizer with the mixed Iron concentrate of water and make iron ball group, again iron ball group is transported in burning machine and is 700 degrees Celsius of lower preheatings 10 minutes in temperature, is 1500 degrees Celsius of lower roastings 15 minutes in temperature, the complete iron pellet strength of roasting is 17.2MPa, and in iron ball group, iron level is 66.3%.
Embodiment 3
2.8 tons of ferrous grades are 70% and particle diameter is that the Iron concentrate of 1.4mm is as raw material, first in Iron concentrate, add 151.5kg water makes Iron concentrate self water content be 9.76%, then add water before pelletizing 56kg water again in Iron concentrate, to be transported in pelletizer with the mixed Iron concentrate of water and make iron ball group, again iron ball group is transported in burning machine and is 650 degrees Celsius of lower preheatings 12 minutes in temperature, is 1400 degrees Celsius of lower roastings 13 minutes in temperature, the complete iron pellet strength of roasting is 19.8MPa, and in iron ball group, iron level is 69.5%.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention do not limit by above-described embodiment; other changes made under not deviating from spirit of the present invention and principle, modification, substitute, combine, simplify; all should be the substitute mode of equivalence, all should be included within protection scope of the present invention.
Claims (4)
1., without the need to an Iron concentrate pelletizing process for binding agent, it is characterized in that: comprise the following steps:
A, to add water in advance: Iron grade be greater than 65% and particle diameter be below 1.5mm Iron concentrate in add water in advance, make Iron concentrate self water content be 9.76%;
Before B, pelletizing, secondary adds water: in Iron concentrate per ton, again add water 20kg;
C, pelletizing: by step B, mixed Iron concentrate is transported in pelletizer and makes iron ball group with water;
D, roasting: the iron ball group in step C is transported to preheating in burning machine, roasting.
2. a kind of Iron concentrate pelletizing process without the need to binding agent according to claim 1, is characterized in that: in described step C, pelletizing diameter is 15-20mm.
3. a kind of Iron concentrate pelletizing process without the need to binding agent according to claim 1, it is characterized in that: in described step D, preheating temperature is 600-700 degree Celsius, maturing temperature is 1300-1500 degree Celsius.
4. a kind of Iron concentrate pelletizing process without the need to binding agent according to claim 1, is characterized in that: in described step D, warm up time is 10-15 minute, and roasting time is 10-15 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510314673.9A CN104975170A (en) | 2015-06-10 | 2015-06-10 | Fine iron ore concentrate pelletizing method free of binders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510314673.9A CN104975170A (en) | 2015-06-10 | 2015-06-10 | Fine iron ore concentrate pelletizing method free of binders |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104975170A true CN104975170A (en) | 2015-10-14 |
Family
ID=54272132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510314673.9A Pending CN104975170A (en) | 2015-06-10 | 2015-06-10 | Fine iron ore concentrate pelletizing method free of binders |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104975170A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6160833A (en) * | 1984-08-30 | 1986-03-28 | Hamada Juko Kk | Treatment of pulverized raw material for iron making |
| JP2000239752A (en) * | 1999-02-25 | 2000-09-05 | Kobe Steel Ltd | Treatment of raw material for production of iron ore pellet |
| CN1804057A (en) * | 2006-01-16 | 2006-07-19 | 唐山国丰钢铁有限公司 | Method for making pellet by fine-grinded steel slag instead of bentonite |
| KR20130008935A (en) * | 2011-07-13 | 2013-01-23 | 주식회사 포스코 | Process for producing pellet with carbonaceous material incorporated therein |
| CN103572044A (en) * | 2013-10-12 | 2014-02-12 | 酒泉钢铁(集团)有限责任公司 | Method for producing iron hot-pressed carbon-containing pellets through direction reduction on metallized iron powder |
-
2015
- 2015-06-10 CN CN201510314673.9A patent/CN104975170A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6160833A (en) * | 1984-08-30 | 1986-03-28 | Hamada Juko Kk | Treatment of pulverized raw material for iron making |
| JP2000239752A (en) * | 1999-02-25 | 2000-09-05 | Kobe Steel Ltd | Treatment of raw material for production of iron ore pellet |
| CN1804057A (en) * | 2006-01-16 | 2006-07-19 | 唐山国丰钢铁有限公司 | Method for making pellet by fine-grinded steel slag instead of bentonite |
| KR20130008935A (en) * | 2011-07-13 | 2013-01-23 | 주식회사 포스코 | Process for producing pellet with carbonaceous material incorporated therein |
| CN103572044A (en) * | 2013-10-12 | 2014-02-12 | 酒泉钢铁(集团)有限责任公司 | Method for producing iron hot-pressed carbon-containing pellets through direction reduction on metallized iron powder |
Non-Patent Citations (2)
| Title |
|---|
| K.梅耶尔: "《铁矿球团法》", 30 April 1986 * |
| 唐先觉等: "《现代钢铁工业技术烧结》", 31 October 1984 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103042223B (en) | A kind of production technology of reduced iron powder | |
| CN103602804B (en) | A kind of high performance pellet binder | |
| CN104775023B (en) | A kind of manufacture method of steel-making coal-pressing ball | |
| CN105567953A (en) | Iron-containing organic metallurgical pellet binder and preparation method thereof | |
| CN102242259A (en) | Preparation process of low-grade laterite nickel ore oxidized pellet | |
| CN105567954A (en) | Method for preparing alkaline pellets through steel slag and product prepared with method | |
| CN103710536A (en) | Preparation method of pellet binder with high performance | |
| CN103725875B (en) | High-performance pellet | |
| CN109852789A (en) | A kind of metallurgical briquetting compound binding agent and its production technology | |
| CN106399678B (en) | A kind of pellet balling-up binding agent and preparation method thereof | |
| CN103725873B (en) | One freezes off knot ball press technique high magnesium consolidating agent and using method | |
| CN104975170A (en) | Fine iron ore concentrate pelletizing method free of binders | |
| CN102121065A (en) | Mineral powder moulding binder | |
| CN104164559A (en) | Method for improving pelletizability of low-pelletizability iron concentrate | |
| CN104017985A (en) | Boron mud powder additive for improving performance of pelletizing ores and sintering ores and preparation method and application method of additive | |
| CN102515467A (en) | Silicon raw material tailing granulated material, and preparation method and application thereof | |
| CN102337395A (en) | Bentonite cellulose ether iron ore pellet additive, and preparation method and application thereof | |
| CN107699688A (en) | A kind of high-phosphorus iron ore sphere of powder group | |
| CN104263916A (en) | Adhesive for pellet and preparation method of pellet | |
| CN102628099A (en) | Method for forming balls by cooling and solidifying mineral powder by using water glass as bonding agent | |
| CN103614552B (en) | Weathered ore prepares the method for acidic oxidation pellet binder | |
| CN103695641B (en) | One freezes off knot ball press technique high calcium consolidating agent and using method | |
| CN102268542B (en) | Method for preparing hematite powder pellets | |
| CN102002583B (en) | Palletizing method of iron ore powder | |
| CN105506211B (en) | A kind of rotary hearth furnace green-ball preparation method containing iron dust containing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151014 |
|
| RJ01 | Rejection of invention patent application after publication |