CN100529003C - Binder adapted for production of cooled agglomerated pellet by using iron-bearing material - Google Patents
Binder adapted for production of cooled agglomerated pellet by using iron-bearing material Download PDFInfo
- Publication number
- CN100529003C CN100529003C CNB200710036164XA CN200710036164A CN100529003C CN 100529003 C CN100529003 C CN 100529003C CN B200710036164X A CNB200710036164X A CN B200710036164XA CN 200710036164 A CN200710036164 A CN 200710036164A CN 100529003 C CN100529003 C CN 100529003C
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- China
- Prior art keywords
- binding agent
- ferrous material
- sodium silicate
- cold
- cooled agglomerated
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Abstract
The invention relates to an adhesion agent, in particular to an adhesion agent for producing cold-bound pellets by ferruginous material, which comprises alkalinity sodium silicate, cold soluble polyvinyl alcohol, polypropylene electrotaxis fiber and light calcium carbonate. The invention has the characteristics of high viscosity, quick pelletization and low cost. The ball can be made by ferruginous waste material. The pelletizing performance of the ferruginous material can be improved and the pellets quality is improved. The micro holes of spheris agglomeration mine are increased and the smelting reducibility of the spheris agglomeration mine is improved. The cold-bound pellets are of high strength, no sintering and low pulverization ratio; therefore the cold-bound pellets can replace lump mine and directly supply for steelmaking and iron making.
Description
Technical field
The present invention relates to binding agent, particularly a kind of binding agent that utilizes ferrous material to produce cooled agglomerated pellet that is applicable to.
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 Al
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 8～10%.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.
Summary of the invention
The object of the present invention is to provide a kind of binding agent that utilizes ferrous material to produce cooled agglomerated pellet that is applicable to.
The objective of the invention is to realize: a kind of binding agent that utilizes ferrous material to produce cooled agglomerated pellet that is applicable to by following approach, this binding agent is used for the ferrous material of water content≤2%, calcium oxide content＜3% is bondd, this binding agent is made up of alkaline sodium silicate, cold soluble type polyvinyl alcohol, polyacrylonitrile fibre, light calcium carbonate, and its compositions in weight percentage is: alkaline sodium silicate 60.0%～77.0%, cold soluble type polyvinyl alcohol 0.4%～1.0%, polyacrylonitrile fibre 0.5%～3.0%, light calcium carbonate 20.0%～36.0%.
Its compositions in weight percentage of this binding agent is: alkaline sodium silicate 68.9%, cold soluble type polyvinyl alcohol 0.7%, polyacrylonitrile fibre 2.8%, light calcium carbonate 27.6%.The best proportion of described alkaline sodium silicate is 1.3～1.4 gram/cubic centimetres, and optimal modulus is 2.40～2.55.Described ferrous material is one or more combinations in revolving furnace mud, dedusting ash, iron sheet ash, the smart fine ore.
Complex adhesive viscosity of the present invention is big, balling-up is fast, cost is low, it also possesses following advantage simultaneously: one, can effectively utilize the self-produced iron-containing wastes of steel mill such as revolving furnace mud, iron scale, dedusting ash, iron-containing waste and smart fine ore are blended under the normal temperature and are pressed into ball, no longer need can not cause secondary pollution to environment through this link of roasting; Two, the cooled agglomerated pellet finished ball ultimate compression strength of producing can be greater than the 2500N/ ball, barrate strength can reach 70～80%, pelletizing the powder phenomenon of breaking can not occur in whole smelting process, can be directly used in steel-making, ironmaking, to replace the consumption of lump ore, minimizing lime and fluorite, play the effect of cooling and slag making, improve the recovery rate of iron and steel; Three, use that binding agent pellet forming process of the present invention is simple, equipment requirements is low, cost cutting, with short production cycle, balling ratio can farthest be enhanced productivity, save production cost up to about 98%.
Embodiment
A kind of binding agent that utilizes ferrous material to produce cooled agglomerated pellet that is applicable to of the present invention, it is used for the ferrous material of water content≤2%, calcium oxide content＜3% is bondd, this binding agent is made up of alkaline sodium silicate, cold soluble type polyvinyl alcohol, polyacrylonitrile fibre, light calcium carbonate, and its compositions in weight percentage is: alkaline sodium silicate 60.0%～77.0%, cold soluble type polyvinyl alcohol 0.4%～1.0%, polyacrylonitrile fibre 0.5%～3.0%, light calcium carbonate 20.0%～36.0%.The best proportion of described alkaline sodium silicate is 1.3～1.4 gram/cubic centimetres, and optimal modulus is 2.40～2.55.Described ferrous material is one or more combinations in revolving furnace mud, dedusting ash, iron sheet ash, the smart fine ore.
Each component in the binder formula of the present invention has following characteristics:
The alkalescence sodium silicate: good heat resistance, cohesiveness are strong;
Cold soluble type polyvinyl alcohol: the water-repellancy, the film-forming properties that strengthen cooled agglomerated pellet;
Polyacrylonitrile fibre: the tensile strength height, good dispersity, stable chemical performance improve the voidage of pelletizing, increase the reductibility of pelletizing;
Light calcium carbonate: fill the pelletizing inter-granular porosity, can strengthen the frictional force between the pelletizing endoparticle, improve the intensity of pelletizing, reduce the pelletizing Pulverization ratio.
Agent of the present invention is used to utilize ferrous material to carry out the production of 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, the iron sheet ash, one or more combinations in the smart fine ore, but its water content should be controlled at water content≤2%, calcium oxide content＜3%, so that better balling-up, and then complex adhesive will be added in the ferrous material, dosage is controlled at 4～6% of ferrous material weight, behind the stirring and evenly mixing, balling-up under the pressure of 150～250 kg/cm, produce cooled agglomerated pellet, cooled agglomerated pellet about 2 hours, can obtain having the finished ball nodulizing of good metallurgical performance in the stockpiling area seasoning.
Embodiment one: each compositions in weight percentage in the binder formula of the present invention is: alkaline sodium silicate 68.9%, cold soluble type polyvinyl alcohol 0.7%, polyacrylonitrile fibre 2.8%, light calcium carbonate 27.6%.
Embodiment two: each compositions in weight percentage in the binder formula of the present invention is: alkaline sodium silicate 77.0%, cold soluble type polyvinyl alcohol 1.0%, polyacrylonitrile fibre 1.0%, light calcium carbonate 21.0%.
Embodiment three: each compositions in weight percentage in the binder formula of the present invention is: alkaline sodium silicate 60.6%, cold soluble type polyvinyl alcohol 0.4%, polyacrylonitrile fibre 3.0%, light calcium carbonate 36.0%.
Claims (4)
1. one kind is applicable to the binding agent that utilizes ferrous material to produce cooled agglomerated pellet, it is characterized in that: this binding agent is used for the ferrous material of water content≤2%, calcium oxide content＜3% is bondd, this binding agent is made up of alkaline sodium silicate, cold soluble type polyvinyl alcohol, polyacrylonitrile fibre, light calcium carbonate, and its compositions in weight percentage is: alkaline sodium silicate 60.0%～77.0%, cold soluble type polyvinyl alcohol 0.4%～1.0%, polyacrylonitrile fibre 0.5%～3.0%, light calcium carbonate 20.0%～36.0%.
2. a kind of binding agent that utilizes ferrous material to produce cooled agglomerated pellet that is applicable to as claimed in claim 1, it is characterized in that: its compositions in weight percentage of this binding agent is: alkaline sodium silicate 68.9%, cold soluble type polyvinyl alcohol 0.7%, polyacrylonitrile fibre 2.8%, light calcium carbonate 27.6%.
3. a kind of binding agent that utilizes ferrous material to produce cooled agglomerated pellet that is applicable to as claimed in claim 1 or 2, it is characterized in that: the best proportion of described alkaline sodium silicate is 1.3～1.4 gram/cubic centimetres, and optimal modulus is 2.40～2.55.
4. a kind of binding agent that utilizes ferrous material to produce cooled agglomerated pellet that is applicable to as claimed in claim 1, it is characterized in that: described ferrous material is one or more combinations in revolving furnace mud, dedusting ash, iron sheet ash, the smart fine ore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710036164XA CN100529003C (en) | 2007-11-20 | 2007-11-20 | Binder adapted for production of cooled agglomerated pellet by using iron-bearing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710036164XA CN100529003C (en) | 2007-11-20 | 2007-11-20 | Binder adapted for production of cooled agglomerated pellet by using iron-bearing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101161832A CN101161832A (en) | 2008-04-16 |
| CN100529003C true CN100529003C (en) | 2009-08-19 |
Family
ID=39296817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200710036164XA Expired - Fee Related CN100529003C (en) | 2007-11-20 | 2007-11-20 | Binder adapted for production of cooled agglomerated pellet by using iron-bearing material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100529003C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103276144B (en) * | 2013-05-22 | 2014-10-08 | 武汉钢铁(集团)公司 | Molten iron heat-preservation and cold-setting pellet containing plant fibers |
| CN103555934B (en) * | 2013-10-24 | 2015-11-04 | 重庆赛迪热工环保工程技术有限公司 | Polyvinyl alcohol water solution is as the application of dedusting ash cold-pressing balls releasing agent, dedusting ash cold-pressing balls and the method preparing dedusting ash cold-pressing balls |
| CN104263916B (en) * | 2014-10-09 | 2017-04-12 | 杨志英 | Adhesive for pellet and preparation method of pellet |
| CN111411218B (en) * | 2020-05-15 | 2021-07-30 | 华北理工大学 | Pore-forming composite additive for dephosphorization of high-phosphorus iron ore pellets, addition method and preparation method thereof |
-
2007
- 2007-11-20 CN CNB200710036164XA patent/CN100529003C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101161832A (en) | 2008-04-16 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20131120 |