CN101586184A - A kind of fast binder that utilizes ferrous material to produce cooled agglomerated pellet - Google Patents
A kind of fast binder that utilizes ferrous material to produce cooled agglomerated pellet Download PDFInfo
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- CN101586184A CN101586184A CNA2009100436630A CN200910043663A CN101586184A CN 101586184 A CN101586184 A CN 101586184A CN A2009100436630 A CNA2009100436630 A CN A2009100436630A CN 200910043663 A CN200910043663 A CN 200910043663A CN 101586184 A CN101586184 A CN 101586184A
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- sodium silicate
- ferrous material
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- agglomerated pellet
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Abstract
The present invention relates to binding agent, particularly a kind of fast binder that is used for ferrous material production cooled agglomerated pellet.This binding agent is made up of sodium silicate, carbon dust, polyacrylonitrile fibre, Disodium sulfate decahydrate, it has, and technology is simple, use cost is low, balling ratio is high, with short production cycle, suitable quantity-produced characteristics, can utilize the ferrous material balling-up, can improve the quality of pelletizing, and can increase micropore in the pellet, improve cooled agglomerated pellet reductibility in smelting process, cooled agglomerated pellet intensity height, unburned knot, Pulverization ratio be low, can substitute lump ore directly for making steel, smelt iron use.
Description
Technical field
The present invention relates to binding agent, particularly a kind of fast binder that utilizes ferrous material to produce cooled agglomerated pellet.
Background technology
At present, China metallurgy industry pellet is produced, and adopts wilkinite as binding agent mostly, but this binding agent is in the balling-up process, and the rate of return mine is 25～30%, and high, when drying, its rate of drying is slow, has influenced output, has increased energy consumption.And bentonitic main component is SiO
2And A1
2O
3, by universal experience, the wilkinite with addition of 1%, the Fe grade that contains of pellet descends 0.6%, increases the quantity of slag 8～15%.On average with addition of 4% wilkinite, many persons reach 7～8% in China pelletizing plant, and few person also is not less than 2.5%, thereby the ferrous grade of pellet is descended, and energy consumption and output that influence is smelted cause enormous economic loss to blast-furnace smelting.
(number of patent application is: 200710036164.X in the patent of invention " a kind of binding agent that utilizes ferrous material to produce cooled agglomerated pellet that is applicable to " of application on November 20th, 2007 in our company, publication number: CN101161832), the binder formula of being put down in writing in the patent is by alkaline sodium silicate, the cold soluble type polyvinyl alcohol, polyacrylonitrile fibre, light calcium carbonate constitutes according to a certain percentage, production and experimental data by in the past few years prove, the described binding agent of this patent still exists add-on bigger than normal in the balling-up process, balling ratio is on the low side, set time is long partially, the shortcoming that production cost is higher.
Summary of the invention
In order to address the above problem, the invention provides a kind of fast binder that ferrous material is produced cooled agglomerated pellet that is used for, its balling technique is simple, use cost is low, balling ratio is high, with short production cycle, suitable continuous production.
The objective of the invention is to realize: a kind ofly be used for fast binder that ferrous material produces cooled agglomerated pellet by weight percentage by following approach, this binding agent is used for the ferrous material of water content≤4%, calcium oxide content＞1% is bondd, and this binding agent is a sodium silicate.
The proportion of described sodium silicate is 1.1～2.0 gram/cubic centimetres, and modulus is 2.0～3.7, and modulus is the silicon oxide in the sodium silicate and the mol ratio of sodium oxide.
Pending ferrous material temperature is below 90 ℃ the time, and the add-on of sodium silicate and ferrous material weight ratio are 5～10%, and modulus is 2.7～3.7; Temperature is more than 90 ℃ the time, and the add-on of sodium silicate and ferrous material weight ratio are 8～15%, and modulus is 2.0～2.8.
The proportion of described sodium silicate is 1.4 gram/cubic centimetres, and modulus is 3.1.
The proportion of described sodium silicate is 1.34 gram/cubic centimetres, and modulus is 3.2.
The proportion of described sodium silicate is 1.3 gram/cubic centimetres, and modulus is 3.3.
Sodium silicate can have two kinds of prescriptions with addition of synergistic agent: the one, and sodium silicate is with addition of carbon dust, and its compositions in weight percentage is: sodium silicate 99%～96.5%, carbon dust 1%～3.5%; The 2nd, sodium silicate is with addition of polyacrylonitrile fibre, carbon dust, Disodium sulfate decahydrate, and its compositions in weight percentage is: sodium silicate 76.8～80%, polyacrylonitrile fibre 12～18.5%, carbon dust 3.5～4%, Disodium sulfate decahydrate 1～4.5%.
In the scheme of carbon dust, its compositions in weight percentage is at sodium silicate: sodium silicate 96.5%, carbon dust 3.5%; In the scheme of polyacrylonitrile fibre, carbon dust, Disodium sulfate decahydrate, its compositions in weight percentage is at sodium silicate: sodium silicate 77.80%, polyacrylonitrile fibre 15.5%, carbon dust 3.5%, Disodium sulfate decahydrate 3.2%.
Pending ferrous material temperature is below 90 ℃ the time, and the add-on of binding agent and ferrous material weight ratio are 10%, and the modulus of its sodium silicate is 3.2; Temperature is more than 90 ℃ the time, and the add-on of binding agent and ferrous material weight ratio are 15%, and the modulus of its sodium silicate is 2.8; Above-mentioned indication modulus is the silicon oxide in the sodium silicate and the mol ratio of sodium oxide.
Described ferrous material be use in Steel Plant's production processes such as revolving furnace mud, dedusting ash, iron scale, smart fine ore, fluorite or the powdery iron-containing waste that produces in one or more combination.
Binding agent viscosifying power of the present invention is strong, balling-up is fast, cost is low, also possesses following advantage simultaneously: one, can effectively utilize the ferrous material compacting balling-up in the powdery iron-containing waste that uses in Steel Plant's production processes such as revolving furnace mud, iron scale, dedusting ash, smart fine ore, fluorite or produce, no longer need through this technology of oversintering, can not cause once more environment and pollute; Two, the finished ball of cooled agglomerated pellet has ultimate compression strength height (2400N/ ball), barrate strength can reach 75～85, efflorescence, explosion phenomenon can not appear in cooled agglomerated pellet in whole smelting process, can be directly used in steel-making, ironmaking to substitute the consumption of lump ore and agglomerate, minimizing lime and fluorite, have the effect of cooling, slag making, dephosphorization simultaneously; Three, use fast binder balling-up of the present invention to have that but technology is simple, cost is low, produce short continuous production of pelletizing cycle, balling ratio can reach about 98%, can farthest enhance productivity, save production cost.
Embodiment
The present invention is a kind of fast binder that is used for ferrous material production cooled agglomerated pellet, described ferrous material be use in Steel Plant's production processes such as revolving furnace mud, dedusting ash, iron scale, smart fine ore, fluorite or the powdery iron-containing waste that produces in one or more combination, described fast binder by weight percentage, this binding agent is used for the ferrous material of water content≤4%, calcium oxide content＞1% is bondd
Binding agent of the present invention is used for the production that ferrous material carries out the cold-consolidated ball nodulizing, its technology is as follows: at first screen ferrous material, this ferrous material can be a revolving furnace mud, dedusting ash, iron scale, smart fine ore, the combination of one or more in the powdery iron-containing waste that uses in Steel Plant's production processes such as fluorite or produce, but ferrous material should be controlled at water content≤2%, calcium oxide content＞1% (the above all is weight percentage), so that better balling-up, and then binding agent will be added in the ferrous material, with the ferrous material optimum weight ratio be 4～15%, ferrous material is after rolling stirs, balling-up under the rolling-type nodulizer, produce cooled agglomerated pellet and send into stockpiling area, seasoning gets final product about 1～8 hour that (time of drying is in seasonal temperature, sodium silicate modulus in the binding agent is relevant, the modulus height, the temperature height is seasoning time weak point then, otherwise then long).
This binding agent is the prescription of major ingredient with the sodium silicate for existing three kinds:
1. simple is the binding agent that raw material is made with the sodium silicate, and the proportion of described sodium silicate is 1.1～2.0 gram/cubic centimetres, and modulus is 2.0～3.7, and modulus is the silicon oxide in the water glass and the mol ratio of sodium oxide.The temperature of the consumption of sodium silicate, modulus and ferrous material is relevant in this binding agent, and the add-on of the high more then binding agent of temperature sodium silicate is big more, modulus is low more, otherwise then opposite.When pending ferrous material temperature below 90 ℃ the time, the add-on of sodium silicate is 5～10%, optimal modulus is 2.7～3.7; Temperature is more than 90 ℃ the time, and the add-on of sodium silicate is 8～15%, and optimal modulus is 2.0～2.8;
2. the binding agent made with addition of carbon dust of sodium silicate, its compositions in weight percentage is: 99%～96.5%, carbon dust 1%～3.5%;
3. the binding agent made with addition of polyacrylonitrile fibre, carbon dust, Disodium sulfate decahydrate of sodium silicate, its composition is by weight percentage: sodium silicate 76.8～80%, polyacrylonitrile fibre 12～18.5%, carbon dust 3.5～4%, Disodium sulfate decahydrate 1～4.5%.
Each component has following characteristics in above-mentioned three kinds of prescriptions:
Sodium silicate: viscosifying power is strong, good dispersity, thermotolerance are strong;
Carbon dust: improve pelletizing voidage at high temperature, accelerate the reducing property of pelletizing;
Polyacrylonitrile fibre: the tensile strength height, good dispersity, stable chemical performance improve the voidage of pelletizing, increase the reductibility of pelletizing;
Disodium sulfate decahydrate: the viscosifying power that improves binding agent.
Embodiment one: each compositions in weight percentage in the binder formula of the present invention is: below 90 ℃ the time, the add-on of sodium silicate and ferrous material weight ratio are 10% to sodium silicate in pending ferrous material temperature, and optimal modulus is 3.2.
Embodiment two: each compositions in weight percentage in the binder formula of the present invention is: more than 90 ℃ the time, the add-on of sodium silicate and ferrous material weight ratio are 14% to sodium silicate in pending ferrous material temperature, and optimal modulus is 2.8.
Embodiment three: each compositions in weight percentage in the binder formula of the present invention is: sodium silicate 97.8%, carbon dust 2.2%.
Embodiment four: each compositions in weight percentage in the binder formula of the present invention is: sodium silicate 96.8%, carbon dust 3.2%
Embodiment five: each compositions in weight percentage in the binder formula of the present invention is: sodium silicate 77.80%, polyacrylonitrile fibre 15.5%, carbon dust 3.5%, Disodium sulfate decahydrate 3.2%.
Embodiment six: each compositions in weight percentage in the binder formula of the present invention is: sodium silicate 78%, carbon dust 3.8%, polyacrylonitrile fibre 15.2%, Disodium sulfate decahydrate 3%.
The effect data that following table has contrasted prior art (comprising disclosed technology sequence number 2 in routine techniques sequence number 1 and the 200710036164.X patent application) and three kinds of prescriptions of the present invention (sequence number 3,4,5) compares:
| Sequence number | Prescription | Balling ratio (%) | Rotary drum | Ultimate compression strength (N) | Set time (my god) | The pelletizing reductibility | Pulverization ratio (%) |
| 1 | Polyvinyl alcohol, cement | 79 | 60 | 1890 | 7 | Bad | 10 |
| 2 | Alkalescence bubble flower alkali, cold soluble type polyvinyl alcohol, polyacrylonitrile fibre, light calcium carbonate (embodiment one in proportioning such as the 200710036164.X patent application document) | 80 | 62 | 1950 | 5 | Generally | 6 |
| 3 | Sodium silicate (proportioning such as present patent application embodiment one) | 85 | 63 | 1980 | 5 | Generally | 7 |
| 4 | Sodium silicate, carbon dust (proportioning such as present patent application embodiment three) | 91 | 74 | 2000 | 5 | Well | 5 |
| 5 | Sodium silicate, polyacrylonitrile fibre, carbon dust, Disodium sulfate decahydrate (proportioning such as present patent application embodiment six) | 99 | 82 | 2400 | 4 | Good | 3 |
The balling ratio of indication embodies adhesive capacity, the dispersiveness of binding agent in the table in cooled agglomerated pellet is produced.Rotary drum embodies the set time of pelletizing and solidifies back ultimate compression strength in cooled agglomerated pellet is produced.Ultimate compression strength is to embody the index of the qualified most critical of cooled agglomerated pellet.Embody the continuous production ability of binding agent in the actual production operation set time.The pelletizing reductibility embodies cooled agglomerated pellet metallicity in smelting process, improves metallurgical effect.Pulverization ratio embodies the chemical stability of binding agent, after promptly solidifying no longer in any chemical reaction takes place.
Claims (10)
1. fast binder that utilizes ferrous material to produce cooled agglomerated pellet, it is characterized in that: by weight percentage, this binding agent is used for the ferrous material of water content≤4%, calcium oxide content＞1% is bondd, and this binding agent is a sodium silicate.
2. a kind of fast binder that utilizes ferrous material to produce cooled agglomerated pellet as claimed in claim 1, it is characterized in that: the proportion of described sodium silicate is 1.1～2.0 gram/cubic centimetres, modulus is 2.0～3.7, and modulus is the silicon oxide in the sodium silicate and the mol ratio of sodium oxide.
3. a kind of fast binder that utilizes ferrous material to produce cooled agglomerated pellet as claimed in claim 2, it is characterized in that: pending ferrous material temperature is below 90 ℃ the time, the add-on of sodium silicate and ferrous material weight ratio are 5～10%, and modulus is 2.7～3.7; Temperature is more than 90 ℃ the time, and the add-on of sodium silicate and ferrous material weight ratio are 8～15%, and modulus is 2.0～2.8.
4. a kind of fast binder that utilizes ferrous material to produce cooled agglomerated pellet as claimed in claim 2, it is characterized in that: the proportion of described sodium silicate is 1.4 gram/cubic centimetres, modulus is 3.1.
5. a kind of fast binder that utilizes ferrous material to produce cooled agglomerated pellet as claimed in claim 2, it is characterized in that: the proportion of described sodium silicate is 1.34 gram/cubic centimetres, modulus is 3.2.
6. a kind of fast binder that utilizes ferrous material to produce cooled agglomerated pellet as claimed in claim 2, it is characterized in that: the proportion of described sodium silicate is 1.3 gram/cubic centimetres, modulus is 3.3.
7. a kind of fast binder that utilizes ferrous material to produce cooled agglomerated pellet as claimed in claim 1, it is characterized in that: sodium silicate can be with addition of synergistic agent, two kinds of prescriptions are arranged: the one, sodium silicate is with addition of carbon dust, and its compositions in weight percentage is: sodium silicate 99%～96.5%, carbon dust 1%～3.5%; The 2nd, sodium silicate is with addition of polyacrylonitrile fibre, carbon dust, Disodium sulfate decahydrate, and its compositions in weight percentage is: sodium silicate 76.8～80%, polyacrylonitrile fibre 12～18.5%, carbon dust 3.5～4%, Disodium sulfate decahydrate 1～4.5%.
8. a kind of fast binder that utilizes ferrous material to produce cooled agglomerated pellet as claimed in claim 7, it is characterized in that: in the scheme of carbon dust, its compositions in weight percentage is at sodium silicate: sodium silicate 96.5%, carbon dust 3.5%; In the scheme of polyacrylonitrile fibre, carbon dust, Disodium sulfate decahydrate, its compositions in weight percentage is at sodium silicate: sodium silicate 77.80%, polyacrylonitrile fibre 15.5%, carbon dust 3.5%, Disodium sulfate decahydrate 3.2%.
9. a kind of fast binder that utilizes ferrous material to produce cooled agglomerated pellet as claimed in claim 7, it is characterized in that: pending ferrous material temperature is below 90 ℃ the time, the add-on of binding agent and ferrous material weight ratio are 10%, and the modulus of its sodium silicate is 3.2; Temperature is more than 90 ℃ the time, and the add-on of binding agent and ferrous material weight ratio are 15%, and the modulus of its sodium silicate is 2.8; Above-mentioned indication modulus is the silicon oxide in the sodium silicate and the mol ratio of sodium oxide.
10. as claim 1 or 7 described a kind of fast binders that ferrous material is produced cooled agglomerated pellet that are used for, it is characterized in that: described ferrous material be use in Steel Plant's production processes such as revolving furnace mud, dedusting ash, iron scale, smart fine ore, fluorite or the powdery iron-containing waste that produces in one or more combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100436630A CN101586184A (en) | 2009-06-10 | 2009-06-10 | A kind of fast binder that utilizes ferrous material to produce cooled agglomerated pellet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100436630A CN101586184A (en) | 2009-06-10 | 2009-06-10 | A kind of fast binder that utilizes ferrous material to produce cooled agglomerated pellet |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978387A (en) * | 2012-11-22 | 2013-03-20 | 北京科大国泰能源环境工程技术有限公司 | Process for producing cold-bonded pellet by using fly ash in steel solid waste |
| CN103074487A (en) * | 2013-01-09 | 2013-05-01 | 承德石油高等专科学校 | Iron ore cooled agglomerated pellet binder |
| CN103276200A (en) * | 2013-07-01 | 2013-09-04 | 济南钢铁集团总公司生产服务公司 | Smelting steel ball and preparation technology thereof |
| CN104498708A (en) * | 2014-12-09 | 2015-04-08 | 攀枝花环业冶金渣开发有限责任公司 | Pellets prepared from blast furnace slag iron fine powder as well as preparation method and application of pellets |
| CN112867804A (en) * | 2018-08-16 | 2021-05-28 | 宾汀解决有限公司 | Binder formulation |
| CN113862470A (en) * | 2021-09-28 | 2021-12-31 | 兰溪市博远金属有限公司 | Binder for fine-grained aluminum ash dry-type pelletizing and fine-grained aluminum ash pelletizing method |
| US11987860B2 (en) | 2021-09-16 | 2024-05-21 | Sidney Nicodemos da Silva | Low temperature briquette of fines bearing iron and other metals |
-
2009
- 2009-06-10 CN CNA2009100436630A patent/CN101586184A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978387A (en) * | 2012-11-22 | 2013-03-20 | 北京科大国泰能源环境工程技术有限公司 | Process for producing cold-bonded pellet by using fly ash in steel solid waste |
| CN103074487A (en) * | 2013-01-09 | 2013-05-01 | 承德石油高等专科学校 | Iron ore cooled agglomerated pellet binder |
| CN103276200A (en) * | 2013-07-01 | 2013-09-04 | 济南钢铁集团总公司生产服务公司 | Smelting steel ball and preparation technology thereof |
| CN103276200B (en) * | 2013-07-01 | 2015-03-04 | 济南钢铁集团总公司生产服务公司 | Smelting steel ball and preparation technology thereof |
| CN104498708A (en) * | 2014-12-09 | 2015-04-08 | 攀枝花环业冶金渣开发有限责任公司 | Pellets prepared from blast furnace slag iron fine powder as well as preparation method and application of pellets |
| CN112867804A (en) * | 2018-08-16 | 2021-05-28 | 宾汀解决有限公司 | Binder formulation |
| US11987860B2 (en) | 2021-09-16 | 2024-05-21 | Sidney Nicodemos da Silva | Low temperature briquette of fines bearing iron and other metals |
| CN113862470A (en) * | 2021-09-28 | 2021-12-31 | 兰溪市博远金属有限公司 | Binder for fine-grained aluminum ash dry-type pelletizing and fine-grained aluminum ash pelletizing method |
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