CN101134999A - Metallized pellet and method for preparing the same - Google Patents
Metallized pellet and method for preparing the same Download PDFInfo
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- CN101134999A CN101134999A CNA2007101486727A CN200710148672A CN101134999A CN 101134999 A CN101134999 A CN 101134999A CN A2007101486727 A CNA2007101486727 A CN A2007101486727A CN 200710148672 A CN200710148672 A CN 200710148672A CN 101134999 A CN101134999 A CN 101134999A
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Abstract
The present invention discloses one kind of metallized pellet, which consists of iron ore powder with 62 % over iron content 80 weight portions, coal powder 17 weight portions, bentonite 2.5 weight portions, and lime 0.5 weight portion. The metallized pellet is prepared through the following steps: weighing materials, dry mixing for 1 min before mixing with water in the amount of 10-15 wt%, pressing first at pressure of 100 t/sq m and then at pressure of 300 t/sq m to form pellet, and final drying in a drying furnace with waste fume at 300 deg.c for 0.5 hr.
Description
Technical field
The present invention relates in shaft furnace and rotary kiln with the technology of direct reducing and smelting sponge iron or liquid steel, is a kind of method for preparing the melting and reducing metallized pellet.
Melting and reducing metallized pellet Technology is the new technology of ironmaking development at present.China's melting and reducing Study on Technology and development through autonomous innovation, have been developed the melting and reducing technology of a series of suitable china natural resources situations and production characteristics on the basis of introduction-digestion-absorption.For technical foundation has been established in the development of steel industry.
The melting and reducing technology has been saved coking and sintering two big links.Being implemented in environment protection, improving the energy structure of Iron And Steel Industry and of melting and reducing technology to the aspects such as lifting of economic benefit all playing positive promoter action.Show by the technology budgetary estimate: the melting and reducing novel process can make energy utilization rate double, and product energy consumption reduces by 50%, and ton steel cost descends 50%.
Summary of the invention
The objective of the invention is, a kind of metallized pellet and preparation method thereof is provided, it mainly takes short flow preparation metallized pellet, supply raw materials for further melting and reducing, make it direct production molten iron or sponge iron, use for steel-making, can reduce steel-making cost significantly, reduce simultaneously and pollute.
Technical scheme of the present invention is achieved in that
A kind of metallized pellet is characterized in that mainly containing the iron amount and is 0.5 part of 2.5 parts of 17 parts of 80 parts of powdered iron ore, coal dusts, wilkinites more than 62% and unslaked lime.A kind of preparation method who implements the described metallized pellet of claim 1, its technological process comprises: at first, component by each weight part takes by weighing raw material, various raw material mixing and stirring, making humidity through the high pressure ball press then is that 10～15% diameters are φ 40mm spheroid, spheroid is changed over to roller conveyer again and send in the stoving oven, the oven dry through 300 ℃ and 30 minutes makes moisture reach 3～5%; Pelletizing is discharged on the drag conveyer from the scraper plate unloading machine, enters the rotary hearth furnace distributing trough.
Description of drawings
Fig. 1 is the process flow sheet of metallized pellet preparation
Embodiment
Metallized pellet as shown in Figure 1 and preparation method thereof, its technological process comprises:
(1), the preparation of metallized pellet:
Behind 80 parts of (weight, down with) powdered iron ore, 17 parts of coal dusts, 3 parts of binding agents and 6～12% water mixings, the compacting balling-up.Binding agent is a wilkinite.The granularity of the product ball (piece) that is pressed into is φ 40mm, and raw material powdered iron ore granularity is 200 orders, and coal powder size is 0～3mm.
(2), system ball:
With various broken on request good raw materials, in the feed bin of packing into,, load weighted material is put into blending device by weighing device automatically weighing on request, do amalgamation minute, add water then, make the water content of material reach 10～15%; Mixing four minutes, discharging will be expected to deliver in the ball press uniformly by screw feeder to the ball press feed bin.The pressing process of ball press is pressurizeed at twice, and the pressure of precompressed is 100T/m
2, the pressure of pressure ball is 300T/m
2Pressure ball should reach at 1.5 meters height freely falling bodies〉10 times not broken.
Pelletizing is exported from ball press, sends in the drying oven through Roller Conveyors, and particle is fallen under the Roller Conveyors and delivered in the feed bin of ball press by reclaiming conveyor and chapelet.
(3), drying:
The metallized pellet that is pressed into is added in the drying oven, utilize 300 ℃ useless flue gas of rotary hearth furnace, the metallized pellet drying.Be 0.5 hour time of drying.
Drying oven is made up of the flue of giving vent to anger of body of heater, rotation stone or metal plate for standing a stove on as a precaution against fire, drive unit, air inlet flue, rotation.Drive unit is speed governing, and the rotating speed on drying oven chassis is adjustable in 10～40 rev/mins of scopes.
Claims (2)
1. metallized pellet is characterized in that it mainly contains the iron amount is 0.5 part of 2.5 parts of 17 parts of 80 parts of powdered iron ore, coal dusts, wilkinites more than 62% and unslaked lime.
2. preparation method who implements the described metallized pellet of claim 1, it is characterized in that: at first take by weighing raw material according to described each weight part of claim 1, hand over raw material blending device evenly to stir, making humidity through the high pressure ball press then is that 10～15% diameter is the spheroid of Φ 40mm, again spheroid is changed on the roller conveyer, and send in the stoving oven, the oven dry through 300 ℃ and 30 minutes makes moisture reach 3～5%; Pelletizing is discharged on the drag conveyer from the scraper plate unloading machine then, enters the rotary hearth furnace distributing trough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101486727A CN101134999A (en) | 2007-03-15 | 2007-08-27 | Metallized pellet and method for preparing the same |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710010625.6 | 2007-03-15 | ||
| CN200710010625 | 2007-03-15 | ||
| CNA2007101486727A CN101134999A (en) | 2007-03-15 | 2007-08-27 | Metallized pellet and method for preparing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101134999A true CN101134999A (en) | 2008-03-05 |
Family
ID=39159323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101486727A Pending CN101134999A (en) | 2007-03-15 | 2007-08-27 | Metallized pellet and method for preparing the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101134999A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703727A (en) * | 2012-06-29 | 2012-10-03 | 中冶南方工程技术有限公司 | Method for comprehensively utilizing gas and dust in steel works |
| CN102925676A (en) * | 2012-11-16 | 2013-02-13 | 鞍钢集团矿业公司 | Novel energy-saving technology for producing pellets with fine-grained iron ore concentrates |
| CN103042223A (en) * | 2012-12-21 | 2013-04-17 | 宁夏众磊鑫科技实业有限公司 | Reduced iron powder production process |
| CN104975172A (en) * | 2014-04-10 | 2015-10-14 | 鞍钢股份有限公司 | Preparation method of pellet performance detection sample |
| CN105400952A (en) * | 2015-11-07 | 2016-03-16 | 衡南扬钢冶金技术有限公司 | Preparation method for furnace burden briquets or pellets or blocks applied to ironmaking |
| CN109371234A (en) * | 2018-12-18 | 2019-02-22 | 安徽工业大学 | Have pellet binder of desulfurizing function and preparation method thereof and its application |
-
2007
- 2007-08-27 CN CNA2007101486727A patent/CN101134999A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703727A (en) * | 2012-06-29 | 2012-10-03 | 中冶南方工程技术有限公司 | Method for comprehensively utilizing gas and dust in steel works |
| CN102925676A (en) * | 2012-11-16 | 2013-02-13 | 鞍钢集团矿业公司 | Novel energy-saving technology for producing pellets with fine-grained iron ore concentrates |
| CN103042223A (en) * | 2012-12-21 | 2013-04-17 | 宁夏众磊鑫科技实业有限公司 | Reduced iron powder production process |
| CN103042223B (en) * | 2012-12-21 | 2015-09-09 | 宁夏众磊鑫科技实业有限公司 | A kind of production technology of reduced iron powder |
| CN104975172A (en) * | 2014-04-10 | 2015-10-14 | 鞍钢股份有限公司 | Preparation method of pellet performance detection sample |
| CN105400952A (en) * | 2015-11-07 | 2016-03-16 | 衡南扬钢冶金技术有限公司 | Preparation method for furnace burden briquets or pellets or blocks applied to ironmaking |
| CN109371234A (en) * | 2018-12-18 | 2019-02-22 | 安徽工业大学 | Have pellet binder of desulfurizing function and preparation method thereof and its application |
| CN109371234B (en) * | 2018-12-18 | 2020-09-01 | 安徽工业大学 | Pellet binder with desulfurization function and preparation method and application thereof |
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |