CN108866326A - A kind of lignin iron powder pellets compound binding agent and preparation method thereof - Google Patents
A kind of lignin iron powder pellets compound binding agent and preparation method thereof Download PDFInfo
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- CN108866326A CN108866326A CN201810800051.0A CN201810800051A CN108866326A CN 108866326 A CN108866326 A CN 108866326A CN 201810800051 A CN201810800051 A CN 201810800051A CN 108866326 A CN108866326 A CN 108866326A
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- lignin
- iron powder
- powder pellets
- binder
- macromolecule
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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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- 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
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Glanulating (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of lignin iron powder pellets compound binding agents and preparation method thereof.The iron powder pellets binder includes following component：Without sulphur macromolecule lignin, oxidized starch and inorganic fluxes.Binder is added in iron powder material according to a certain percentage, stirs and sprinkle suitable quantity of water forms and has sticking mixture, be placed in ball press and iron powder pellets are made.Iron powder pellets are sent into drying oven, successively pass through low temperature, medium temperature and high-temperature region drying and roasting, consolidation becomes the iron powder pellets with some strength.Since iron powder consumption of binder is larger, the present invention provides effective way using the macromolecule lignin of not sulfur-bearing and alkali metal as the main component of iron powder pellets binder, for the application of large lignin raw material.
Description
Technical field
The invention belongs to steel casting field, in particular to a kind of lignin iron powder pellets composite adhesive and its preparation side
Method.
Background technique
In steel manufacture process at this stage, iron content is uniform in the iron ore in order to guarantee to supply blast furnace, improves iron
The metallurgical performance of ore adapts to blast furnace process to the quality requirement of iron ore, and guarantees the gas permeability of blast furnace, needs dresser
The block stock of 10-25mm is made in the iron ore concentrate of skill output.Based on this, need for various iron ore concentrates or levigate natural mine to be equipped with
Pellet binder and suitable quantity of water are made into green-ball, then pelletizing is made through high temperature or low-temperature bake.
The key of pelletizing be prepare a kind of adhesive property it is high, without to the harmful alkali metal of iron-smelting process and can be significant
Improve the binder of molding pelletizing cold strength.Be generally used for the binder of pelletizing, be divided into inorganic binder, organic binder and
Compound binding agent three categories.Inorganic binder mostly uses greatly clay, lime, bentonite, and patent CN 101392322A discloses one
The production method of kind ferrosilicon powder sphere, binder is using inorganic material such as quartz sand, anhydrous sodium sulphate and SILICA FUMEs.Anshan Iron and Steel Company
The calcium hydroxide of supplying 2%~3% is as binder in iron ore concentrate at first with Benxi Iron and Steel Company, even if this inorganic binder exists
Still there is good adhesive property under conditions of high temperature, keep higher pelletizing mechanical strength.But the adhesive cool intensity is low,
The impurity content of pelletizing improves, and energy consumption, slag making amount etc. increase therewith.Patent CN1733947A discloses a kind of iron powder ball used in steel making
Preparation method, mainly use the organic binders such as humic acid and starch.Patent CN105483370A also discloses a kind of iron
Powder coal-pressing ball exempts to dry the component of binder, and wherein the starch of high-content and xanthan gum belong to the component of organic binder.
Organic binder has preferable bonding cold strength at normal temperature, can be improved Iron grade, reduces energy consumption, improves yield.But temperature
More than 400 DEG C, pelletizing mechanical strength declines with the gradually decomposition of binder, causes pelletizing damaged under furnace pressure effect
Dusting.
In view of problem above existing for single binder, it is high to need to find a kind of adhesive property, cheap while to refining
Cast steel iron process does not generate the binder of adverse effect, is applied to during the iron powder pellets of steel production.Lignin is made
It is the second largest renewable plant resources for being only second to cellulose, especially greatly for a kind of polymer being widely present in plant
The lignin of molecular weight has good caking property, is conducive to improve bonding cold strength.Patent CN 103113840A discloses one
The method that kind prepares based Wood Adhesives using black liquid, the black liquid that will be enriched in lignin are effectively utilized.And this
Invention is using the lignin raw material of not sulfur-bearing and alkali metal as the main component of iron powder pellets binder, by Iron Ore Powder and the bonding
Agent is mixed and made into miberal powder ball, improves the physical and chemical performance of iron powder pellets, and powdery iron-containing raw material is made to be utilized effectively, and raising is smelted back
Yield mitigates the pollution to environment to save cost.
Summary of the invention
The object of the present invention is to provide a kind of lignin iron powder pellets compound binding agents, are applied to steel and iron manufacturing industry.This is viscous
Tying agent, mainly using the not macromolecule lignin of sulfur-bearing and alkali metal, simultaneously it is cold strong to improve pelletizing as organic component for mixing starch
Degree.And inorganic component of the inorganic fluxes as binder, it improves pelletizing calorific intensity and reduces fusing point.
Lignin iron powder pellets compound binding agent preparation method, includes the following steps in the present invention：
(1) preparation of lignin：Take certain mass without sulphur lignin, the ratio in solid-to-liquid ratio 1: 40-1: 50 (m/v) is molten
Solution is in the NaOH solution of 1-2%.The pH value of lignin liquor is transferred to 9-10, after being filtered to remove insoluble impurity, to retain molecule
Amount is that the ultrafiltration membrane of 6000-10000Da is concentrated to get macromolecule lignin liquor.Lignin liquor is adjusted with HCl solution
PH to 2-3 is centrifuged and washes lignin deposit to remove sodium chloride, and the macromolecule lignin for obtaining not sulfur-bearing and alkali metal is former
Material.
(2) preparation of binder：Lignin, oxidized starch, fluxing agent and water are mixed well according to following mass parts,
The iron powder pellets binder with certain humidity is made.
(3) above-mentioned binder is added in iron powder according to the 7-15% of iron powder quality.Sprinkle suitable quantity of water, protects moisture content
It holds in 10-15%, is sufficiently mixed and stirs evenly, pelletizing is made through ball press.The communicated band of iron powder pellets is sent into drying oven,
In drying oven, successively pass through low temperature, medium temperature and high-temperature region drying and roasting, consolidation becomes the iron powder pellets with some strength.
Innovation of the invention is bonded using the macromolecule lignin of not sulfur-bearing and alkali metal as iron powder pellets
The main component of agent is improved cold strength, inorganic component improves calorific intensity and is reduced the property of fusing point, compounds nothing based on organic component
Machine aided flux improves the physical and chemical performance of binder.Since iron powder consumption of binder is larger, the present invention utilizes not sulfur-bearing and alkali
Main component of the macromolecule lignin of metal as iron powder pellets binder provides for the application of large lignin raw material
Effective way.
Specific embodiment
Embodiment 1：
The alkali lignin for taking certain mass is dissolved in 1% NaOH solution according to the ratio of solid-to-liquid ratio 1: 50 (m/v).It will
The pH value of lignin liquor is transferred to 10, after being filtered to remove insoluble impurity, is concentrated to give with molecular cut off for the ultrafiltration membrane of 10000Da
To macromolecule lignin liquor.The pH to 3 that macromolecule lignin liquor is adjusted with HCl solution, is centrifuged and washes lignin
Precipitating obtains the macromolecule lignin raw material of not sulfur-bearing and alkali metal to remove sodium chloride.By lignin, oxidized starch and help
Flux according to：25 parts of lignin, 15 parts of oxidized starch, 25 parts of pulverized limestones, 8 parts of magnesia, 7 parts of magnesium chlorides, the ratio of 20 parts of water
It is thoroughly mixed, aqueous 20% iron powder pellets binder is made.Above-mentioned binder is added according to the 12% of iron powder quality
In iron powder.Sprinkle suitable quantity of water, makes moisture content be maintained at 15%, is sufficiently mixed and stirs evenly, and sphere is made through ball press.By iron
The communicated band of sphere of powder group is sent into drying oven, which successively passes through low temperature, medium temperature and high-temperature region drying and roasting, be consolidated into
For the iron powder pellets with some strength.
Embodiment 2：
The alkali lignin for taking certain mass is dissolved in 1% NaOH solution according to the ratio of solid-to-liquid ratio 1: 50 (m/v).It will
The pH value of lignin liquor is transferred to 9, after being filtered to remove insoluble impurity, is concentrated to give with molecular cut off for the ultrafiltration membrane of 10000Da
To macromolecule lignin liquor.The pH to 2 that macromolecule lignin liquor is adjusted with HCl solution, is centrifuged and washes lignin
Precipitating obtains the macromolecule lignin raw material of not sulfur-bearing and alkali metal to remove sodium chloride.By lignin, oxidized starch and help
Flux according to：30 parts of lignin, 10 parts of oxidized starch, 25 parts of pulverized limestones, 10 parts of magnesia, 10 parts of magnesium chlorides, the ratio of 15 parts of water
Example is thoroughly mixed, and aqueous 15% iron powder pellets binder is made.Above-mentioned binder is added according to the 10% of iron powder quality
Enter in iron powder.Sprinkle suitable quantity of water, makes moisture content be maintained at 12%, is sufficiently mixed and stirs evenly, and sphere is made through ball press.It will
The communicated band of iron powder pellets is sent into drying oven, which successively passes through low temperature, medium temperature and high-temperature region drying and roasting, consolidates
As the iron powder pellets with some strength.
Embodiment 3：
The ethyl alcohol lignin for taking certain mass is dissolved in 2% NaOH solution according to the ratio of solid-to-liquid ratio 1: 40 (m/v).
The pH value of lignin liquor is transferred to 9, after being filtered to remove insoluble impurity, is concentrated to give with molecular cut off for the ultrafiltration membrane of 6000Da
To macromolecule lignin liquor.The pH to 2 that macromolecule lignin liquor is adjusted with HCl solution, is centrifuged and washes lignin
Precipitating obtains the macromolecule lignin raw material of not sulfur-bearing and alkali metal to remove sodium chloride.By lignin, oxidized starch and help
Flux according to：25 parts of lignin, 15 parts of oxidized starch, 20 parts of pulverized limestones, 15 parts of magnesia, 10 parts of magnesium chlorides, the ratio of 15 parts of water
Example is thoroughly mixed, and aqueous 15% iron powder pellets binder is made.Above-mentioned binder is added according to the 7% of iron powder quality
In iron powder.Sprinkle suitable quantity of water, makes moisture content be maintained at 15%, is sufficiently mixed and stirs evenly, and sphere is made through ball press.By iron
The communicated band of sphere of powder group is sent into drying oven, which successively passes through low temperature, medium temperature and high-temperature region drying and roasting, be consolidated into
For the iron powder pellets with some strength.
Claims (3)
1. a kind of lignin iron powder pellets compound binding agent and preparation method thereof, the method includes the following steps：
A take certain mass without sulphur lignin, the NaOH for being dissolved in 1-2% according to the ratio of solid-to-liquid ratio 1: 40-1: 50 (m/v) is molten
The pH value of lignin liquor is transferred to 9-10 by liquid, is 6000-10000Da's with molecular cut off after being filtered to remove insoluble impurity
Ultrafiltration membrane is concentrated to get macromolecule lignin liquor, and the pH to 2-3 of macromolecule lignin liquor is adjusted with HCI solution, from
The heart simultaneously washes lignin deposit to remove sodium chloride, obtains the macromolecule lignin raw material of not sulfur-bearing and alkali metal；
B is by lignin, oxidized starch, fluxing agent and water according to mass parts ratio：20-30: 10-20: 40-50: 10-20 mixing, system
There must be the iron powder pellets binder of certain humidity；
Above-mentioned binder is added in iron powder c according to the 7-15% of iron powder quality, and sprinkle suitable quantity of water, moisture content is maintained at 10-
15%, it stirs, pelletizing is made through ball press；Pelletizing is sent into drying oven, successively passes through low temperature, medium temperature and high-temperature region
Drying and roasting, consolidation become the iron powder pellets with some strength.
2. a kind of lignin iron powder pellets compound binding agent according to claim 1 and preparation method thereof, it is characterised in that：
It is described without sulphur lignin to be non-sulfuric acid salt and sulphite slurrying obtains lignin, including alkali lignin, enzymolysis xylogen and
Organic solvent lignin.
3. a kind of lignin iron powder pellets compound binding agent according to claim 1 and preparation method thereof, it is characterised in that：
The fluxing agent is by pulverized limestone, magnesia and magnesium chloride composition, and mass percent is lime 50-65%, magnesia 15-
30% and magnesium chloride 15-25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810800051.0A CN108866326A (en) | 2018-07-18 | 2018-07-18 | A kind of lignin iron powder pellets compound binding agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810800051.0A CN108866326A (en) | 2018-07-18 | 2018-07-18 | A kind of lignin iron powder pellets compound binding agent and preparation method thereof |
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| CN108866326A true CN108866326A (en) | 2018-11-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114438315A (en) * | 2022-02-10 | 2022-05-06 | 贵州理工学院 | Formula of micro silicon powder pellet binder |
| CN117403061A (en) * | 2023-12-11 | 2024-01-16 | 秦皇岛贝特化工科技有限公司 | Binder for quick solidification of cold solidified pellet |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1733947A (en) * | 2005-09-01 | 2006-02-15 | 张庆国 | Iron powder ball used in steel making and its preparation method |
| CN101020961A (en) * | 2007-02-09 | 2007-08-22 | 李垠平 | Pretreatment of material for smelting ferrosilicon |
| CN101701290A (en) * | 2009-12-02 | 2010-05-05 | 田原宇 | Composite adhesive containing coal iron powder pellets |
| CN102030909A (en) * | 2009-09-28 | 2011-04-27 | 中国科学院过程工程研究所 | Method for separating and extracting lignin by using ultrafiltration membrane |
| CN103145998A (en) * | 2013-03-15 | 2013-06-12 | 浙江捷发科技有限公司 | Method for preparing lignin by utilizing papermaking black liquid |
| 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 |
-
2018
- 2018-07-18 CN CN201810800051.0A patent/CN108866326A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1733947A (en) * | 2005-09-01 | 2006-02-15 | 张庆国 | Iron powder ball used in steel making and its preparation method |
| CN101020961A (en) * | 2007-02-09 | 2007-08-22 | 李垠平 | Pretreatment of material for smelting ferrosilicon |
| CN102030909A (en) * | 2009-09-28 | 2011-04-27 | 中国科学院过程工程研究所 | Method for separating and extracting lignin by using ultrafiltration membrane |
| CN101701290A (en) * | 2009-12-02 | 2010-05-05 | 田原宇 | Composite adhesive containing coal iron powder pellets |
| CN103145998A (en) * | 2013-03-15 | 2013-06-12 | 浙江捷发科技有限公司 | Method for preparing lignin by utilizing papermaking black liquid |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114438315A (en) * | 2022-02-10 | 2022-05-06 | 贵州理工学院 | Formula of micro silicon powder pellet binder |
| CN117403061A (en) * | 2023-12-11 | 2024-01-16 | 秦皇岛贝特化工科技有限公司 | Binder for quick solidification of cold solidified pellet |
| CN117403061B (en) * | 2023-12-11 | 2024-03-22 | 秦皇岛贝特化工科技有限公司 | Binder for quick solidification of cold solidified pellet |
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Application publication date: 20181123 |