CN104357656A - Organic adhesive and blast furnace ironmaking pellet prepared from same - Google Patents
Organic adhesive and blast furnace ironmaking pellet prepared from same Download PDFInfo
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- CN104357656A CN104357656A CN201410662895.5A CN201410662895A CN104357656A CN 104357656 A CN104357656 A CN 104357656A CN 201410662895 A CN201410662895 A CN 201410662895A CN 104357656 A CN104357656 A CN 104357656A
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- organic binder
- binder bond
- organic adhesive
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- ball
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
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- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to an organic adhesive and an ironmaking pellet prepared from the organic adhesive. The organic adhesive is prepared by the following steps: mixing one or composition of rice, chaff, glutinous rice and corn in a ratio of 2:3:1:4, bulking with a bulking machine at 250-280 DEG C under the pressure of 1.1-1.2 MPa, and pulverizing to obtain the powder with the particle size of 150-200 mu m. The ironmaking pellet is prepared by pelletizing 0.1-0.5% of organic adhesive, 1-1.5% of calcium bentonite and the balance of iron concentrate powder. The organic adhesive is safe and reliable, and is convenient for transportation. The preparation technique is easy to operate, has the advantages of low cost, accessible raw materials and the like, and can enhance the physicochemical properties of the pellets in the pellet production. When the organic adhesive is used in the process of producing steelmaking slag, pipeline ash pellets, fluorite pellets and the like, the produced industrial finished product has favorable physicochemical properties, and the organic adhesive can solve the trouble and problems caused by other adhesives.
Description
Technical field
The present invention relates to ferrous metallurgy agglomerates of sintered pellets production technical field, specifically a kind of organic binder bond and the iron smelting pellets with its production.
Background technology
Iron ore pellets there is good metallurgical performance and improve breathability of stock column for blast furnace can feature, because of but a kind of indispensable raw material in blast furnace ironmaking, in the last few years, iron ore pellets proportion in blast furnace ironmaking raw material was increasing.
In current pellet production process, the main wilkinite that uses is as binding agent, and wilkinite, as the binding agent of pellet formation, has the advantages such as balling property is good, resource is sufficient; But wilkinite can not decompose volatilization when pelletizing high-temperature roasting, and wilkinite contains a large amount of silicon-dioxide.If thus bentonitic usage ratio is excessive in pellet formation process, not only can reduce the ferrous grade of pellet, but also the quantity of slag of blast furnace ironmaking can be increased, cause coke ratio to raise, waste energy.
Often improve the centesimal ferrous grade of iron-smelting furnace charge, iron per ton can reduce by 2% coke usage quantity.If use organic binder bond to substitute the binding agent of wilkinite as pellet formation, organic matter binding agent decomposes volatilization in the process of pellet roasting, and then improves the ferrous grade of pelletizing, effectively can improve the economic worth of ton iron.
Organic binder bond is a kind of polymkeric substance, and be the macromolecular cpd of the natural chain-like structure be polymerized by a large amount of carboxyl, hydroxyl, methyl, its main component is carbohydrate.Group under normal temperature on molecular side chain and the ion of mineral substance, polar molecule forms ionic linkage, the chemical combination such as covalent linkage or hydrogen bond bonding force.
Summary of the invention
The present invention is directed to the defect of some problems that present wilkinite brings and wilkinite self, in order to improve the ferrous grade of pellet, and increase the porosity of pellet spherome surface, reach the intensity and reducing property that improve pellet, improve the effect of the utilising efficiency of ore, the iron smelting pellets that spy provides a kind of organic binder bond and produces with it.
Technical scheme of the present invention is for this reason, a kind of organic binder bond, it is characterized in that: using rice, crack rice, glutinous rice, corn be separately as raw material or the ratio mix in 2:3:1:4, it is 250 ~ 280 DEG C by temperature, pressure is that the bulking machine of 1.1 ~ 1.2Mpa is expanded, and the powder being then crushed to 150 ~ 200um is this organic binder bond.
With the iron smelting pellets that organic binder bond is produced, it is characterized in that: in iron smelting pellets, weight percent is: the adding proportion of organic binder bond is 0.1 ~ 0.5%, the adding proportion of calcium-base bentonite is 1 ~ 1.5%, and all the other are fine iron breeze; Fully mix with organic binder bond and calcium-base bentonite after iron ore concentrate being dried in balling process, then send into balling disc and carry out pelletizing.
Further improvement is: balling disc rotating speed is 25r/min, angle set is 45 °, Balling time is that 16 ~ 21min can become green-ball, horizontal pipe kiln roasting is sent into after being dried at the temperature of 110 ~ 130 DEG C by green-ball again, maturing temperature 1250 DEG C, roasting time 20 ~ 31min gets final product balling-up.
Beneficial effect:
Organic binder bond of the present invention has safe and reliable, convenient transport, and preparation process is simple, technology of preparing easily operates, with low cost, and raw material such as to be easy to get at the advantage, the physical and chemical performance of pelletizing can be improved in pellet formation, the material that pelletizing high-temperature roasting time-division solution discharges to environment without harm.Organic binder bond is being produced steelmaking slag, is being adopted in the technique of pipeline lime balls, production Fluorite pellet etc. handicraft product, the finished industrial product produced has good physical and chemical performance, but also can solve all puzzlements and a difficult problem that some other binding agents bring.
And organic binder cemented ability is better than wilkinite, during pelletizing, balling property is better, and green-ball of making all is better than wilkinite pelletizing at dropping strength and ultimate compression strength; High and the pelletizing surface porosity factor of finished ball ferrous grade is higher than wilkinite pelletizing.
Organic binder bond wetting ability and good water absorption, need not carry out oven dry and get final product pelletizing for the iron ore concentrate that water content is high.Dried dry bulb is in roasting process, and organic binder bond chemical reaction occurs under the high temperature conditions and decomposes volatilization, reduces the quality of single pelletizing, improves the ferrous grade of pellet.The blast furnace quantity of slag can also be reduced in blast furnace ironmaking process, be conducive to proterctive equipment, reduce energy consumption, thus reduce the production cost of the pig iron.
Embodiment
A kind of organic binder bond, using rice, crack rice, glutinous rice, corn be separately as raw material or the ratio mix in 2:3:1:4, be 250-280 DEG C by temperature, pressure is that the bulking machine of 1.1-1.2Mpa is expanded, and the powder being then crushed to 150-200um is this organic binder bond.
With the iron smelting pellets that organic binder bond is produced, in iron smelting pellets, weight percent is: the adding proportion of organic binder bond is 0.1 ~ 0.5%, and the adding proportion of calcium-base bentonite is 1 ~ 1.5%, and all the other are fine iron breeze; Fully mix with organic binder bond and calcium-base bentonite after iron ore concentrate being dried in balling process, then send into balling disc and carry out pelletizing.
Balling disc rotating speed is 25r/min, angle set is 45 °, and Balling time is that 16-21min can become green-ball, then sends into horizontal pipe kiln roasting after being dried at the temperature of 110 ~ 130 DEG C by green-ball, maturing temperature 1250 DEG C, roasting time 20-31min gets final product balling-up.
The organic binder bond concrete operations way that the present invention adopts in balling process is in fine iron breeze, add organic binder bond and the calcium-base bentonite of different ratios in balling process.
The adding proportion of organic binder bond is 0.1 ~ 0.5%, and the adding proportion of calcium-base bentonite is 1 ~ 1.5%.
The pelletizing mechanism adopted is balling disc.
The Balling time adopted in balling process is 16 ~ 21min.
During pelletizing, the moisture controlled of green-ball is 8% ~ 10%.
Green-ball diameter control is at 9 ~ 16mm.
The particle proportion that iron ore concentrate raw material granularity is less than 74 μm reaches more than 80%.
It is highly 500mm that shatter strength of green pellet detects.
The drying temperature of green-ball is set in 110 ~ 130 DEG C, and dry bulb maturing temperature is set in 1250 DEG C.
The calciner that after drying, green-ball adopts is horizontal pipe stove, and roasting time is 20 ~ 31min.
case study on implementation one:
Adopting with fine iron breeze is raw material, and the adding proportion of organic binder bond is 0.1%, and the adding proportion of calcium-base bentonite is 0.9%.
Require: producing iron ore concentrate ore water ratio used is 8 ~ 9%, wherein in fine iron breeze, full iron (TFe) content is 64.76%, and the main component in fine iron breeze is magnetite, and ore particle diameter is less than 74 μm of proportions and reaches 85.4%.
In balling process, fine iron breeze fully mixes with organic binder bond and calcium-base bentonite after drying, and then sends into balling disc and carries out pelletizing; Wherein balling disc speed setting is 22r/min, and angle set is 45 °; Balling time is set in 16min, after pelletizing completes, chooses the green-ball of diameter at 10 ~ 12mm, measure its dropping strength, ultimate compression strength, green-ball sends into horizontal pipe kiln roasting, maturing temperature 1250 DEG C, roasting time 31min after drying at the temperature of 110 DEG C.
Some performance perameters of finished ball are as table 1.
Some performance perameters of table 1. pelletizing
| Organic binder bond/% | Calcium-base bentonite/% | Finished ball TFe/% | Shatter strength of green pellet/time | Green-ball resistance to compression/(N/) | Ripe ball resistance to compression/(kN/) |
| 0.1 | 0.9 | 63.22 | 3.3 | 14.04 | 2.86 |
| 0 | 1 | 63.10 | 2.7 | 8.60 | 2.35 |
Controlling content of binder on the basis of 1% as can be seen here, the consumption of suitable minimizing calcium-base bentonite, increase the consumption of organic binder bond, the dropping strength of green-ball can be improved, the ultimate compression strength of compression strength of green pellet and ripe ball, reduce the Pulverization ratio of pelletizing in roasting process, the utilization ratio of ore can be improved, also improve the content of Fe in pelletizing.
case study on implementation two
Adopting with fine iron breeze is raw material, and the adding proportion of organic binder bond is 0.3%, and the adding proportion of calcium-base bentonite is 0.7%.
Require: producing ore water ratio used is 8 ~ 9%, and full iron (TFe) content is 64.76%, and the main component in iron ore concentrate is magnetite, and ore particle diameter is less than 74 μm of proportions and reaches 85.4%.
In balling process, iron ore concentrate fully mixes with organic binder bond and calcium-base bentonite after drying, and then sends into balling disc and carries out pelletizing; Wherein balling disc speed setting is 20r/min, and angle set is 45 °.Balling time is set in 18min.After pelletizing completes, choose the green-ball of diameter at 10 ~ 12mm, measure its dropping strength, ultimate compression strength and quiet quick-fried temperature, quiet quick-fried temperature is 750 DEG C.Green-ball sends into horizontal pipe kiln roasting, maturing temperature 1250 DEG C, roasting time 25min after drying at the temperature of 120 DEG C.
Some performance perameters of finished ball are as table 2.
Some performance perameters of table 2. pelletizing
| Organic binder bond/% | Calcium-base bentonite/% | Finished ball TFe/% | Shatter strength of green pellet/time | Green-ball resistance to compression/(N/) | Ripe ball resistance to compression/(kN/) |
| 0.3 | 0.7 | 63.27 | 3.5 | 13.84 | 2.68 |
| 0 | 1 | 63.10 | 2.7 | 8.60 | 2.35 |
Controlling content of binder on the basis of 1% as can be seen here, the consumption of suitable minimizing calcium-base bentonite, increase the consumption of organic binder bond, the dropping strength of green-ball can be improved, the ultimate compression strength of compression strength of green pellet and ripe ball, reduce the Pulverization ratio of pelletizing in roasting process, the utilization ratio of ore can be improved.And which also enhances the content of Fe in pelletizing.Along with the consumption of organic binder bond increases, the iron-holder of pelletizing raises further, and the ultimate compression strength of green-ball and the ultimate compression strength of ripe ball have and reduces by a small margin, but still meet the technical indicator of pellet formation.
case study on implementation three
Adopting with fine iron breeze is raw material, and the adding proportion of organic binder bond is 0.5%, and the adding proportion of calcium-base bentonite is 1%.
Require: producing the full iron of ore used (TFe) content is 65.6%, and the main component in iron ore concentrate is magnetite, and ore particle diameter is less than 74 μm of proportions and reaches 90%.
In balling process, iron ore concentrate fully mixes with organic binder bond and calcium-base bentonite after drying, and then sends into balling disc and carries out pelletizing; Wherein balling disc speed setting is 25r/min, and angle set is 45 °.Balling time is set in 21min.After pelletizing completes, choose the green-ball of diameter at 10 ~ 12mm, measure its dropping strength, ultimate compression strength.Green-ball sends into horizontal pipe kiln roasting, maturing temperature 1250 DEG C, roasting time 31min after drying at the temperature of 120 DEG C.
Some performance perameters of finished ball are as table 3.
Some performance perameters of table 3. pelletizing
| Organic binder bond/% | Calcium-base bentonite/% | Finished ball TFe/% | Shatter strength of green pellet/time | Green-ball resistance to compression/(N/) | Ripe ball resistance to compression/(kN/) |
| 0.5 | 1 | 64.3 | 5.2 | 12.86 | 2.72 |
Along with the add-on of organic binder bond and calcium-base bentonite all increases, ultimate compression strength and the dropping strength of green-ball all significantly improve, while the Quality advance of green-ball, full iron (TFe) content of finished ball raises, the utilising efficiency of blast furnace can be improved, also can reduce the quantity of slag that ton iron produces, improve economic worth.
Claims (3)
1. an organic binder bond, it is characterized in that: using rice, crack rice, glutinous rice, corn be separately as raw material or the ratio mix in 2:3:1:4, it is 250 ~ 280 DEG C by temperature, pressure is that the bulking machine of 1.1 ~ 1.2Mpa is expanded, and the powder being then crushed to 150 ~ 200um is this organic binder bond.
2., with the iron smelting pellets that organic binder bond is produced, it is characterized in that: in iron smelting pellets, weight percent is: the adding proportion of organic binder bond is 0.1 ~ 0.5%, the adding proportion of calcium-base bentonite is 1 ~ 1.5%, and all the other are fine iron breeze; Fully mix with organic binder bond and calcium-base bentonite after fine iron breeze being dried in balling process, then send into balling disc and carry out pelletizing.
3. the iron smelting pellets of a kind of organic binder bond production according to claim 2, it is characterized in that: balling disc rotating speed is 25r/min, angle set is 45 °, Balling time is that 16 ~ 21min can become green-ball, horizontal pipe kiln roasting is sent into after being dried at the temperature of 110 ~ 130 DEG C by green-ball again, maturing temperature 1250 DEG C, roasting time 20 ~ 31min gets final product balling-up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410662895.5A CN104357656A (en) | 2014-11-20 | 2014-11-20 | Organic adhesive and blast furnace ironmaking pellet prepared from same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410662895.5A CN104357656A (en) | 2014-11-20 | 2014-11-20 | Organic adhesive and blast furnace ironmaking pellet prepared from same |
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| Publication Number | Publication Date |
|---|---|
| CN104357656A true CN104357656A (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410662895.5A Pending CN104357656A (en) | 2014-11-20 | 2014-11-20 | Organic adhesive and blast furnace ironmaking pellet prepared from same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113388734A (en) * | 2021-02-26 | 2021-09-14 | 安徽工业大学 | Method for treating waste catalyst capable of strengthening pellet cohesiveness |
Citations (6)
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| WO2002036836A1 (en) * | 2000-10-30 | 2002-05-10 | Nippon Steel Corporation | Metal oxide-containing green pellet for reducing furnace, method for production thereof, method for reduction thereof, and reduction facilities |
| CN1818097A (en) * | 2006-03-14 | 2006-08-16 | 淄博宜龙化工有限公司 | Pelletizing binder with starch and humus acid and production thereof |
| CN103154276A (en) * | 2010-10-14 | 2013-06-12 | 新日铁住金株式会社 | Process for production of reduced iron |
| CN103290159A (en) * | 2013-06-06 | 2013-09-11 | 昆明钢铁集团有限责任公司 | Method for producing directly-reduced iron powder in microwave heating manner |
| CN103484665A (en) * | 2013-10-14 | 2014-01-01 | 北京科技大学 | Method for manufacturing metallurgic composite pellet by using different binders and two-step pelletizing way |
| CN104498709A (en) * | 2014-11-20 | 2015-04-08 | 湖北丹江口市宝洲冶金材料有限公司 | Organic binder and steel mill pipe ash pressed pellet produced by the same |
-
2014
- 2014-11-20 CN CN201410662895.5A patent/CN104357656A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002036836A1 (en) * | 2000-10-30 | 2002-05-10 | Nippon Steel Corporation | Metal oxide-containing green pellet for reducing furnace, method for production thereof, method for reduction thereof, and reduction facilities |
| CN1818097A (en) * | 2006-03-14 | 2006-08-16 | 淄博宜龙化工有限公司 | Pelletizing binder with starch and humus acid and production thereof |
| CN103154276A (en) * | 2010-10-14 | 2013-06-12 | 新日铁住金株式会社 | Process for production of reduced iron |
| CN103290159A (en) * | 2013-06-06 | 2013-09-11 | 昆明钢铁集团有限责任公司 | Method for producing directly-reduced iron powder in microwave heating manner |
| CN103484665A (en) * | 2013-10-14 | 2014-01-01 | 北京科技大学 | Method for manufacturing metallurgic composite pellet by using different binders and two-step pelletizing way |
| CN104498709A (en) * | 2014-11-20 | 2015-04-08 | 湖北丹江口市宝洲冶金材料有限公司 | Organic binder and steel mill pipe ash pressed pellet produced by the same |
Non-Patent Citations (1)
| Title |
|---|
| 黄国风: "圆盘造球机的圆盘转速与圆盘倾角的研究", 《有色金属(冶炼部分)》, no. 05, 17 March 1965 (1965-03-17), pages 31 - 32 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113388734A (en) * | 2021-02-26 | 2021-09-14 | 安徽工业大学 | Method for treating waste catalyst capable of strengthening pellet cohesiveness |
| CN113388734B (en) * | 2021-02-26 | 2024-01-05 | 安徽工业大学 | Method for treating waste catalyst by strengthening pellet cohesiveness |
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Application publication date: 20150218 |