CN1074714A - Cold concretion high carbon content iron mineral ball group for iron-smelting - Google Patents
Cold concretion high carbon content iron mineral ball group for iron-smelting Download PDFInfo
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- CN1074714A CN1074714A CN93102740A CN93102740A CN1074714A CN 1074714 A CN1074714 A CN 1074714A CN 93102740 A CN93102740 A CN 93102740A CN 93102740 A CN93102740 A CN 93102740A CN 1074714 A CN1074714 A CN 1074714A
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- pelletizing
- iron ore
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- iron
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Abstract
The invention belongs to metallurgy industry ironmaking field.The manufacture method of the cold fixed high carbon containing iron ore pellets that is specially adapted to smelt iron.
Pelletizing composition of the present invention is made up of powdered iron ore, additive, coal dust and binding agent, and adopts batch mixing, shelving, spreading batch mixing, makes ball and dry the hardened manufacture method and produce cold fixed high carbon containing iron ore pellets.The pelletizing that adopts the inventive method to produce has the characteristics of high mixed carbon comtent, high strength, high autoreduction ability, high reduction rate and high anti-oxidation ability.This pelletizing is applicable to various metallurgical production.
Description
The invention belongs to metallurgical ironmaking field.Be specially adapted to the method for iron ore pellets.
At present development research briquet replacing coke, short flow process, efficient, energy-conservation, pollution is little, the production handiness is strong and cost is low ironmaking technique of fusion and reduction have become the important development trend of countries nowadays Iron And Steel Industry.Therefore raising along with the development and the iron of smelting reduction process are bathed secondary burning technology more needs to provide Well-recovered and adaptable iron-smelting raw material.U.S. pelletizing technology company develops a kind of cold-bonded carbonic pellet of allocating into less than 19% carbon containing material, and the ultimate compression strength of this pelletizing can reach 180 kilograms of/balls.Can allocate this kind pelletizing of 10% in blast furnace into, hamony kind pelletizing also can use in electric furnace, rotary kiln or cupola furnace.But shortcomings such as this kind pelletizing is to adopt steam-cured manufactured, and this manufacture method has complex process, and facility investment height and autoclave operation easier are big.One piece of " technical study of the comprehensive nodulizing of low-temperature concretion " article has been introduced by Zhongnan Polytechnic Univ in addition, the cold-bonded carbonic pellet that is proposed by this article is low owing to the carbon amount of allocating into, and low carbon-containing does not possess complete autoreduction ability in belonging to, and integrated metallurgical performance, especially high-temperature behavior is poor.
" (agglomerates of sintered pellets) second phase in 1987, the second phase in 1992 ".
The manufacture method that the purpose of this invention is to provide the cold fixed high carbon containing iron ore pellets of a kind of high mixed carbon comtent, high strength, high autoreduction ability, high reduction rate and high anti-oxidation ability.
For addressing the above problem, the material composition scope of the cold solid high carbon containing iron ore pellets that the present invention is designed is (weight %) powdered iron ore 55～79.8%, coal dust 19.2～30%, binding agent 1～10%, additive≤5%.In cold fixed high carbon containing iron ore pellets of the present invention, each component includes following raw materials according: powdered iron ore is made up of magnetite, rhombohedral iron ore, iron scale, one or both and the two or more mixing ore deposits that contain in the iron furnace.Coal dust is made up of in hard coal or the bituminous coal any one, also can be made up of the mixing coal of these two kinds of coals.Binding agent mainly is the water glass type binding agent.Binding agent can also be by in syrup waste liquid, the spent pulping liquor any.Wherein the water glass type binding agent can be a kind of in sodium silicate and the potash water glass, also sodium potassium mixed type water glass.The modulus of this water glass should be in 2.0～4.0 scopes, i.e. SiO in the water glass
2With Na
2O or K
2O or Na
2O+K
2The ratio of the mole number of O is 2-4.
(SiO
2)/(Na
2O) or (SiO
2)/(K
2O) or (SiO
2)/(Na
2O+K
2O) value is 2～4.
In order to improve the viscosifying power of water glass, can allocate 0.1～3.0%(quality % in the water glass type binding agent in pelletizing component of the present invention into) urea.Additive is the basicity of pelletizing for a change in the pelletizing component of the present invention, improve the reductibility and the Slag Properties of pelletizing, help smelting and set, the composition of its additive is to be mixed by one or both and two or more raw materials in lime, Wingdale, rhombspar, wilkinite and the fluorite, its content should≤5%(weight %).
Pelletizing of the present invention mainly uses pair roller pressure ball, punching block pressure ball, disk and the manufacturing of cylinder pelletizing method.It makes the ball method and requirement is described below.
Raw material in pelletizing composition of the present invention all need be broken into granularity less than 3mm.The mixing of raw material is according to the weight percent batching that set to require, and adds water and mix, when the total water content in the raw material (weight %) is must be less than 8%(such as the moisture content of raw material own too high, must oven dry to less than 8%).Batch mixing can carry out in cylinder or wheeled mixing machine, makes moisture content, granularity and each component uniform distribution of compound.For making the abundant wetting raw material of moisture content energy, necessary shelving≤24 hours.Adopt mixing machine that the compound that contains binding agent is carried out the secondary mixing then, adopt spreading equipment with compound spreading 1-8 time then, sample can improve the intensity of the ball of making.The cold fixed high carbon containing iron ore pellets of the present invention can be made the ball manufactured with pair roller pressure ball method, punching block pressure ball method, disk or drum type brake.The pelletizing of producing must drying be handled, and the oven dry sclerosis can be carried out under 100 ℃-250 ℃, and the time is 1-3 hour.Also can in the exsiccant air, seasoning harden 2-10 days.Pelletizing is reached deposit, the intensity of transportation and smelting requirements.
The cold fixed high carbon containing iron ore pellets of the present invention and make the ball method and have following characteristics compared with prior art.Because of can not using coke and coking coal in the pelletizing of the present invention, so pelletizing of the present invention has the low and little characteristics of environmental pollution of material cost.The pelletizing mixed carbon comtent is reasonable, makes pelletizing have complete autoreduction ability, under 1200 ℃-1300 ℃, just can reach the reducing metal rate more than 80% in tens minutes.The room temperature strength of this pelletizing, especially hot strength height, compressive strength at room temperature can reach 200 kilograms of/balls, by adjusting component, pellet strength can be adjusted arbitrarily in tens kilograms～200 kilograms of/ball scopes, satisfy transportation fully and stack requirement, pelletizing hot strength salient features shows following several respects.
1, loading softening begins temperature and can reach more than 1000 ℃.
2,900 ℃ of reduction degrees that reduction can reach more than 35% in 1 hour, and can adjust its reductibility.
3,900 ℃ of reduction swellability rates are general all less than 5%.
4, ultimate compression strength reaches 6 kilograms/more than the ball after 900 ℃ of reduction.
The pelletizing that adopts the inventive method to produce can utilize the waste gas oven dry pelletizing of various metallurgical furnaces, also can seasoning in air, and reduced and made ball cost and energy consumption.This pelletizing is applicable to various metallurgical production.
Embodiment
Test is the component that adopts pelletizing of the present invention, has prepared seven groups of test material, and in order to contrast conveniently, we get five groups of contrast material simultaneously and list in the table 1.Table 1 is the constitutive material and the proportioning table of carbonaceous pelletizing.Sequence number 1-7 is a pelletizing sequence number of the present invention in table 1.8-9 is a U.S. MTU pelletizing.10-12 is the pelletizing of the big production of Central-South worker.In table 1 in No. 9 hurdles in the stove dirt percentage composition of carbon be 13.4%.Pellet feed granularity of the present invention is≤3mm.
Carry out batch mixing respectively after above-mentioned 1-7 group raw material prepared, its batch mixing condition sees Table 2.Table 2 is embodiment of the invention batch mixing condition and bake out temperature table.Pelletizing of the present invention is to adopt the pair roller ball press that the raw material that mixes is pressed into to require the size pelletizing, and oven dry is hardened and pelletizing is carried out metallurgy performance test then.Table 3 is embodiment pelletizing and other pelletizing metallurgy performance test contrast table.
Table 2, embodiment batch mixing condition and bake out temperature
Claims (13)
1, the manufacture method of a kind of cold concretion high carbon content iron mineral ball group for iron-smelting and this pelletizing, it is characterized in that cold fixed high carbon containing iron ore pellets composition is by (weight %) powdered iron ore 55～79.8%, coal dust 19.2～30%, binding agent 1～10%, additive≤5% composition and adopt batch mixing, shelving, rolling material batch mixing, make ball and this cold fixed high carbon containing iron ore pellets of oven dry hardened method manufacturing.
2,, it is characterized in that powdered iron ore in this pelletizing composition is made up of one or both and two or more raw materials in magnetite, rhombohedral iron ore, iron scale and the carbon containing stove dirt according to the described pelletizing of claim 1.
3,, it is characterized in that coal dust is made up of the mixing coal of one or both coals in hard coal and the bituminous coal in this pelletizing composition according to the described pelletizing of claim 1.
4,, it is characterized in that binding agent in this pelletizing composition is any one in sodium silicate, potash water glass and the sodium potassium mixed type water glass according to the described pelletizing of claim 1.
5, according to claim 1,4 described pelletizings, it is characterized in that the modulus of water glass in this pellet binder, i.e. SiO
2With Na
2O or K
2O or Na
2O+K
2The ratio of the mole number of O is respectively 2-4.
6,, it is characterized in that the urea that to join (weight %) 0.1～3.0% in the water glass type binding agent of this pelletizing use according to claim 1,4,5 described pelletizings.
7,, it is characterized in that also any in syrup waste liquid, the low pulp waste of binding agent in this pelletizing composition according to the described pelletizing of claim 1.
8,, it is characterized in that in this pelletizing composition that additive can be made up of one or both and two or more analysis of material in lime, Wingdale, rhombspar, wilkinite, the fluorite according to the described pelletizing of claim 1.
9,, it is characterized in that the total water content (weight %) in the mixing raw material must be less than 8% according to the described manufacture method of claim 1.
10, according to the described manufacture method of claim 1, it is characterized in that after the mixing raw materials must shelving≤and 24 hours.
11,, it is characterized in that to adopt spreading equipment to compound spreading 1～8 time after mixing raw materials evenly according to the described manufacture method of claim 1.
12,, it is characterized in that this pelletizing oven dry hardened temperature * time is 100-250 ℃ * 1-3 hour according to the described manufacture method of claim 1.
13,, it is characterized in that this pelletizing can harden 2-10 days in seasoning in the exsiccant air according to the described manufacture method of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93102740A CN1074714A (en) | 1993-03-18 | 1993-03-18 | Cold concretion high carbon content iron mineral ball group for iron-smelting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93102740A CN1074714A (en) | 1993-03-18 | 1993-03-18 | Cold concretion high carbon content iron mineral ball group for iron-smelting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1074714A true CN1074714A (en) | 1993-07-28 |
Family
ID=4984258
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93102740A Pending CN1074714A (en) | 1993-03-18 | 1993-03-18 | Cold concretion high carbon content iron mineral ball group for iron-smelting |
Country Status (1)
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|---|---|
| CN (1) | CN1074714A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100365138C (en) * | 2005-11-08 | 2008-01-30 | 青岛森田金属有限公司 | Method for mfg. composite carbon containing pellets and device thereof |
| CN100366766C (en) * | 2001-03-20 | 2008-02-06 | 斯塔泰克制铁公司 | Method for using pre-jel for producing self-reducing agglomerates |
| WO2008131614A1 (en) * | 2007-04-30 | 2008-11-06 | Zhengzhou Yongtong Special Steel Co., Ltd. | A SMELTING METHOD OF LOW-P STAINLESS STEEL BASE USING LOW-GRADE IRONSTONE CONTAINING Ni AND Cr |
| CN102747221A (en) * | 2012-06-14 | 2012-10-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for making cold-pressed balls through using powdery material containing iron |
| 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 |
| CN103436694A (en) * | 2013-09-04 | 2013-12-11 | 宁夏天元锰业有限公司 | Method for preparing chrome ore pellets |
| CN104046772A (en) * | 2013-03-15 | 2014-09-17 | 上海梅山钢铁股份有限公司 | Method for making cooled agglomerated pellets by use of converter gas dry-method electrostatic precipitator |
| CN104630408A (en) * | 2015-02-13 | 2015-05-20 | 唐竹胜 | Coal-base low-temperature quick deep reduction method of high-density metallized pellets |
| CN105063261A (en) * | 2015-08-20 | 2015-11-18 | 山西太钢不锈钢股份有限公司 | Production method of furnace burden for blast furnace ironmaking |
| CN107032311A (en) * | 2016-11-03 | 2017-08-11 | 葛振华 | A kind of yellow phosphorus mineral powder pelletizing method |
| CN108588411A (en) * | 2018-04-27 | 2018-09-28 | 北京科技大学 | A kind of preparation method of the high-carbonaceous metallized agglomerate of blast furnace |
| CN109371235A (en) * | 2018-12-18 | 2019-02-22 | 安徽工业大学 | Based on NH3The iron ore Shaft Furnace Pelletizing Process process sulfur method of sustained-release adhesive |
| CN109371231A (en) * | 2018-12-18 | 2019-02-22 | 安徽工业大学 | Grate-rotary kiln pelletizing process pre-desulfurization denitration method |
| US11168381B2 (en) * | 2013-10-17 | 2021-11-09 | Ambiente E Nutrizione S.R.L. | Process for upgrading waste powders from mines, containing iron oxides |
-
1993
- 1993-03-18 CN CN93102740A patent/CN1074714A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366766C (en) * | 2001-03-20 | 2008-02-06 | 斯塔泰克制铁公司 | Method for using pre-jel for producing self-reducing agglomerates |
| CN100365138C (en) * | 2005-11-08 | 2008-01-30 | 青岛森田金属有限公司 | Method for mfg. composite carbon containing pellets and device thereof |
| WO2008131614A1 (en) * | 2007-04-30 | 2008-11-06 | Zhengzhou Yongtong Special Steel Co., Ltd. | A SMELTING METHOD OF LOW-P STAINLESS STEEL BASE USING LOW-GRADE IRONSTONE CONTAINING Ni AND Cr |
| CN100532579C (en) * | 2007-04-30 | 2009-08-26 | 郑州永通特钢有限公司 | Method for smelting base material of low phosphorous stainless steel by using low-grade limonite containing nickel-chromium |
| CN102747221A (en) * | 2012-06-14 | 2012-10-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for making cold-pressed balls through using powdery material containing iron |
| CN102747221B (en) * | 2012-06-14 | 2016-10-05 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Make the method for cold-pressing balls of iron content granular material |
| CN104046772A (en) * | 2013-03-15 | 2014-09-17 | 上海梅山钢铁股份有限公司 | Method for making cooled agglomerated pellets by use of converter gas dry-method electrostatic precipitator |
| 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 |
| CN103436694A (en) * | 2013-09-04 | 2013-12-11 | 宁夏天元锰业有限公司 | Method for preparing chrome ore pellets |
| US11168381B2 (en) * | 2013-10-17 | 2021-11-09 | Ambiente E Nutrizione S.R.L. | Process for upgrading waste powders from mines, containing iron oxides |
| CN104630408A (en) * | 2015-02-13 | 2015-05-20 | 唐竹胜 | Coal-base low-temperature quick deep reduction method of high-density metallized pellets |
| CN105063261A (en) * | 2015-08-20 | 2015-11-18 | 山西太钢不锈钢股份有限公司 | Production method of furnace burden for blast furnace ironmaking |
| CN105063261B (en) * | 2015-08-20 | 2018-01-19 | 山西太钢不锈钢股份有限公司 | A kind of production method of blast furnace ironmaking furnace charge |
| CN107032311A (en) * | 2016-11-03 | 2017-08-11 | 葛振华 | A kind of yellow phosphorus mineral powder pelletizing method |
| CN108588411A (en) * | 2018-04-27 | 2018-09-28 | 北京科技大学 | A kind of preparation method of the high-carbonaceous metallized agglomerate of blast furnace |
| CN108588411B (en) * | 2018-04-27 | 2020-02-07 | 北京科技大学 | Preparation method of high-carbon-content metallized briquette for blast furnace |
| CN109371235A (en) * | 2018-12-18 | 2019-02-22 | 安徽工业大学 | Based on NH3The iron ore Shaft Furnace Pelletizing Process process sulfur method of sustained-release adhesive |
| CN109371231A (en) * | 2018-12-18 | 2019-02-22 | 安徽工业大学 | Grate-rotary kiln pelletizing process pre-desulfurization denitration method |
| CN109371235B (en) * | 2018-12-18 | 2020-07-24 | 安徽工业大学 | Based on NH3Desulfurization method for iron ore shaft furnace pelletizing process by slow release of binder |
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