CN1786202A - Composite carbon containing pellet - Google Patents
Composite carbon containing pellet Download PDFInfo
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- CN1786202A CN1786202A CNA2005101342952A CN200510134295A CN1786202A CN 1786202 A CN1786202 A CN 1786202A CN A2005101342952 A CNA2005101342952 A CN A2005101342952A CN 200510134295 A CN200510134295 A CN 200510134295A CN 1786202 A CN1786202 A CN 1786202A
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- carbon containing
- steel
- composite carbon
- containing pellet
- pellet according
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention belongs to ferrous metallurgy field. It mainly relates to steel smelting carbon containing ball, especially electric furnace using scrap steel making or cast steel carburetion. The compound carbon containing ball chemical compositions (wt%)are containing material 40-80%, metal oxide 10-42%, rare earth oxide 5-30%, bonding agent 2-10%, reinforcing agent 1-5%, expansion agent 1-5%, and steel products processing smear metal 1-4%. Its intensity is high; mono ball compressive strength can reach more than 5Mpa. It can be add into the molten steel to increase carbon, reduce inclusion, removing harmful gas, purify grain boundary, and refine grain to improve steel toughness.
Description
Technical field
The invention belongs to the ferrous metallurgy field, relate generally to the carbonaceous pelletizing that smelting iron and steel is used.
Background technology
Carbonaceous pelletizing is exactly to contain certain charcoal element in the pelletizing as its name suggests, as contains coke, coal, graphite carbon, charcoal etc.In the ferrous metallurgy field, in different technology, requirement for a certain metallurgical technology, adopt different carbonaceous pelletizings, but common metallurgy carbonaceous pelletizing, its carbon content is all lower, generally be no more than 30%, as be used to produce the pelletizing of sponge iron, and carbon content is 10-20% usually, its effect is that carbon uses as reductive agent in whole roasting process; Used iron content agglomerates of sintered pellets in blast furnace or shaft furnace production process generally is equipped with 5% coke powder, when charcoal element wherein is roasting as the usefulness of heat-generating agent, binding agent.
In addition, the main raw material of Electric furnace steel making or cast steel is a steel scrap, comprises the discarded steel of non-structural part or non-bearing part, and these all are frivolous steel scraps, its carbon content is all lower, general carbon content and because storage period is long, is placed in the open between 0.15～0.35% usually, steel scrap is very easily given birth to and is lured, when making steel in electric furnace with this steel scrap, the carbon content according to smelting steel grade need be equipped with carbon element in furnace charge.When being equipped with carbon element, also to participate in reduction reaction owing to need to consider the scaling loss of carbon and a part of carbon, so need be with addition of higher carbon amount to ferric oxide.The material of joining carbon usually has pig, molten iron, block coke, barren rock electrode ink or carbonaceous pelletizing, and sprays powdered carbonaceous material etc. in molten steel.Join in the carbon material above-mentioned, carbonaceous pelletizing since produce easy, inexpensive and easy to use, be Electric furnace steel making the most frequently used join one of carbon material, promptly be the furnace refractory of using always.
In the prior art, the most frequently used carbonaceous pelletizing of Electric furnace steel making is to be main raw material with the coke powder, is equipped with a certain amount of binding agent and makes, and its carbon content reaches more than 80%.But the main drawback of this carbonaceous pelletizing is the carburetting weak effect, does not reach the carburetting requirement of electric furnace with steel scrap steel-making.
Summary of the invention
The object of the present invention is to provide and a kind ofly can satisfy the composite carbon containing pellet that Electric furnace steel making or cast steel or other metallurgy are joined the carbon requirement.
At above-mentioned purpose, the present invention proposes following technical scheme, promptly the Chemical Composition of composite carbon containing pellet of the present invention (wt%) is:
Carbonaceous material 40～80%, metal oxide 10～42%, rare earth oxide 5～30%, binding agent 2～10%, toughener 1～5%, swelling agent 1～5%, steel processing smear metal 1～4%.
Carbonaceous material is any or any two above sum in coke powder, indefinite form Graphite Powder 99, petroleum coke powder, barren rock electrode ink powder or the pulverized anthracite.
Metal oxide is any or any two above sum among MgO, CaO, the BaO.
Rare earth oxide is CeO
2, Ce
2O
3, La
2O
3, Nd
2O
3In any or any two above sum.
Carbonaceous material, metal oxide and rare earth oxide are meal, and its particle diameter is 0.001～3.0mm;
Binding agent is any or any two above sum in resol, paraffin wax, tar, mineral oil, oil, dissolve with methanol rosin, solid bitumen or the eu-bitumen.
Toughener is any or any two above sum in steel fiber or the vegetable fibre.
Swelling agent is flaky vermiculite or CaCO
3In any or any two above sum.Wherein expand the rate of expansion of flaky vermiculite greater than 10 times.
The particle diameter of binding agent, toughener, swelling agent and steel processing smear metal is 0.0001～0.001mm.
In above-mentioned Chemical Composition, carbonaceous material is a main raw material, and it mainly acts on is to impel the smelting steel grade to increase needed carbon content, promptly satisfies steel grade carburetting requirement.
The adding of metal oxide is to smelt the receptivity of steel grade to carbon in order to improve, and this also is to sum up a conclusion of coming out from practice.
Add rare earth oxide in the Chemical Composition and be for steel grade in carburetting, improve the cleanliness factor of steel, improve its toughness, because of rare earth can reduce steel inclusion in molten steel, remove obnoxious flavour, and can purify crystal boundary, crystal grain thinning, thereby improve the toughness of steel.
Binding agent adds in the composite carbon containing pellet material with liquid form, when binding agent when being solid-state at normal temperatures, adds in the pelletizing material after being heated into liquid state again; Owing to contain metal oxide and rare earth oxide in the pelletizing, so can not use aqueous binders or aqueous solution binding agent.Binding agent adds in the pelletizing, and the one, make all materials in the pelletizing condense into group, the one, form layer protecting film on the pelletizing surface, make various oxide compounds and air in the pelletizing isolated, keep the proper property of pelletizing, keep the intensity of pelletizing, make it not break.
The adding of toughener and steel processing smear metal, the one, in order to strengthen the intensity of pelletizing, make it in transportation, storage and use, not break, keep the proper property of pelletizing; The 2nd, be convenient to adjust the proportion of pelletizing, when making it to add molten steel, can sink to rapidly in the molten steel, bring into play its due effect.
The effect of swelling agent is in order to make composite carbon containing pellet at high temperature have swelling property, make pelletizing add in the molten steel after, expand rapidly, increase specific surface area, help carburetting and physical reaction, accelerate the smelting speed of steel grade, shorten the heat.
The manufacture method of composite carbon containing pellet of the present invention is as follows: at first prepare burden according to its Chemical Composition, and solid materials is carried out fragmentation roll, reach required granularity, then the pressed powder material is put into mixer and mix, after mixing, drop into liquid adhesive again, and mix once more, after mixing final mixture is sent in the ball press, be pressed into pelletizing, after treating the pelletizing drying, promptly become composite carbon containing pellet of the present invention.
The intensity height of composite carbon containing pellet of the present invention, the ultimate compression strength of its single spheroid reaches more than the 5Mpa.
Compared with prior art, the present invention has following advantage:
1. composite carbon containing pellet of the present invention adds in the molten steel, and the carburetting effect is remarkable, stable.
2. composite carbon containing pellet of the present invention can not only carburetting, and can reduce steel inclusion, and remove obnoxious flavour, and can purify crystal boundary, crystal grain thinning, thus improve the toughness of steel.
3. because composite carbon containing pellet compressive strength height makes it not break, keep the proper property of pelletizing in transportation, storage and use.
4. owing to added toughener and steel processing smear metal in the pelletizing, can adjust the proportion of pelletizing, when making it to add in the steel, can sink to rapidly in the molten steel, bring into play its due effect.
Embodiment
Embodiment
The Chemical Composition of composite carbon containing pellet according to the present invention has prepared 5 replies and has closed carbonaceous pelletizing, and its concrete Chemical Composition is as shown in table 1.Carbonaceous pelletizing is closed in 5 replies of preparation in 30 tons Electric furnace steel making, carry out the carburetting test respectively, composite carbon containing pellet and steel scrap add in the lump and begin in the electric furnace to smelt, in smelting process, at first measured the carbon content of (oxidation latter stage) molten steel when steel scrap is molten clear, measuring result is listed in the table 2.The add-on of composite carbon containing pellet and the ultimate compression strength of single spheroid have also been listed in the table 2 in.In order to contrast, in same electric furnace, add carburelant pig and coke briquette respectively, carry out the carburetting test, test-results is also listed in the table 2.Find out that by table 2 composite carbon containing pellet carburetting effect of the present invention is remarkable.
The Chemical Composition (wt%) of table 1 embodiment composite carbon containing pellet
| Lot number | Carbonaceous material | Metal oxide | Rare earth oxide | Binding agent | Toughener | Swelling agent | Steel processing smear metal |
| 1 | Coke powder 51 | MgO 24 | Ce 2O 3 11.9 | Tar 6.0 | Steel fiber 2.1 | Flaky vermiculite 3.2 | 1.8 |
| 2 | Indefinite form Graphite Powder 99 23 coke powders 31 | BaO 21 | Nd 2O 3 13.9 Ce 2O 3 8.8 | Mineral oil 2.7 | Vegetable fibre 3.0 | CaCO 31.3 flaky vermiculite 1.8 | 2.3 |
| 3 | Pulverized anthracite 31 coke powders 23 | CaO 36 | Nd 2O 3 13.9 | Pitch 2.5 paraffin waxes 1.0 | Vegetable fibre 1.9 | Flaky vermiculite 2.3 | 2.3 |
| 4 | Barren rock electrode ink powder 28 petroleum coke powders 19 | BaO 18 MgO 11 | La 2O 3 5.1 Nd 2O 35. 7 | Paraffin wax 3.5 | Steel fiber 2.1 vegetable fibres 1.9 | Flaky vermiculite 4.1 | 1.6 |
| 5 | Barren rock electrode ink powder 63 | BaO 15 | La 2O 3 8.6 | Resol 5.1 | Steel fiber 2.4 | CaCO 3 3.4 | 2.5 |
Table 2 embodiment Electric furnace steel making carburetting test-results
| Lot number | Electric furnace tonnage ton | Carburetting material add-on kilogram/ton | The single spheroid ultimate compression strength of carbonaceous pelletizing MPa | Carbon content % when steel scrap is molten clear in the molten steel | |
| The present invention | 1 | 30 | 8.9 | 7.1 | 0.31 |
| 2 | 30 | 9.3 | 6.5 | 0.41 | |
| 3 | 30 | 7.9 | 6.9 | 0.29 | |
| 4 | 30 | 10.5 | 7.3 | 0.33 | |
| 5 | 30 | 11.0 | 6.1 | 0.72 | |
| Comparative Examples | Pig | 30 | 55 | 0.25 | |
| Coke briquette | 30 | 5.8 | 0.23 | ||
Claims (9)
1. composite carbon containing pellet is characterized in that its Chemical Composition (wt%) is:
Carbonaceous material 40～80%, metal oxide 10～42%, rare earth oxide 5～30%, binding agent 2～10%, toughener 1～5%, swelling agent 1～5%, steel processing smear metal 1～4%.
2. composite carbon containing pellet according to claim 1 is characterized in that carbonaceous material is any or any two above sum in coke powder, indefinite form Graphite Powder 99, petroleum coke powder, rubble electrode ink powder or the pulverized anthracite.
3. composite carbon containing pellet according to claim 1 is characterized in that metal oxide is any or any two above sum among MgO, CaO, the BaO.
4. composite carbon containing pellet according to claim 1 is characterized in that rare earth oxide is CeO
2, Ce
2O
3, La
2O
3, Nd
2O
3In any or any two above sum.
5. composite carbon containing pellet according to claim 1 is characterized in that binding agent is any or any two above sum in resol, paraffin wax, tar, mineral oil, oil, dissolve with methanol rosin, solid bitumen or the eu-bitumen.
6. composite carbon containing pellet according to claim 1 is characterized in that toughener is any or any two above sum in steel fiber or the vegetable fibre.
7. composite carbon containing pellet according to claim 1 is characterized in that swelling agent is flaky vermiculite or CaCO
3In any or any two above sum.
8. composite carbon containing pellet according to claim 8, rate of expansion 〉=1000% of the flaky vermiculite that it is characterized in that expanding.
9. composite carbon containing pellet according to claim 1, the particle diameter that it is characterized in that carbonaceous material, metal oxide and rare earth oxide is 0.001～3.0mm; The particle diameter of binding agent, toughener, swelling agent and steel processing smear metal is 0.0001～0.001mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101342952A CN100355910C (en) | 2005-12-16 | 2005-12-16 | Composite carbon containing pellet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101342952A CN100355910C (en) | 2005-12-16 | 2005-12-16 | Composite carbon containing pellet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1786202A true CN1786202A (en) | 2006-06-14 |
| CN100355910C CN100355910C (en) | 2007-12-19 |
Family
ID=36783815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101342952A Expired - Fee Related CN100355910C (en) | 2005-12-16 | 2005-12-16 | Composite carbon containing pellet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100355910C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008083594A1 (en) * | 2006-12-30 | 2008-07-17 | Qingdao Deshipu Metallurgy Science & Technology Co. Ltd | Lime-based additive for steel smelting and the preparation method thereof |
| CN104073630A (en) * | 2014-07-21 | 2014-10-01 | 安徽工业大学 | Iron base carbonaceous pellet using waste plastics as carbon source and preparation method of iron base carbonaceous pellet |
| CN104973880A (en) * | 2015-06-25 | 2015-10-14 | 云南永昌硅业股份有限公司 | Carbonaceous pellet and preparation method thereof |
| CN108707723A (en) * | 2018-04-12 | 2018-10-26 | 万杨知为 | Steel-making quick slag material and its production method |
| CN110551873A (en) * | 2019-10-09 | 2019-12-10 | 王强 | harmless process for artificial diamond waste graphite powder |
| CN111893296A (en) * | 2020-09-10 | 2020-11-06 | 山东众亿赫贸易有限公司 | Hot-pressing scrap steel recarburization method and device |
| CN112853038A (en) * | 2020-12-24 | 2021-05-28 | 上海盛宝冶金科技有限公司 | Environment-friendly carbonaceous exothermic agent for steelmaking and preparation method thereof |
| CN113817918A (en) * | 2021-08-05 | 2021-12-21 | 包头钢铁（集团）有限责任公司 | Method for improving reduction expansion of high-alkali metal and high-F content pellet ore |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU863690A1 (en) * | 1977-11-09 | 1981-09-15 | Научно-исследовательский институт металлургии | Coating for pellets |
| CN1190507C (en) * | 2002-10-10 | 2005-02-23 | 吴光亮 | Composite ball rolls of manganese and its preparation method |
-
2005
- 2005-12-16 CN CNB2005101342952A patent/CN100355910C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008083594A1 (en) * | 2006-12-30 | 2008-07-17 | Qingdao Deshipu Metallurgy Science & Technology Co. Ltd | Lime-based additive for steel smelting and the preparation method thereof |
| CN104073630A (en) * | 2014-07-21 | 2014-10-01 | 安徽工业大学 | Iron base carbonaceous pellet using waste plastics as carbon source and preparation method of iron base carbonaceous pellet |
| CN104073630B (en) * | 2014-07-21 | 2016-05-25 | 安徽工业大学 | A kind of waste plastics is iron-based carbonaceous pelletizing of carbon source and preparation method thereof |
| CN104973880A (en) * | 2015-06-25 | 2015-10-14 | 云南永昌硅业股份有限公司 | Carbonaceous pellet and preparation method thereof |
| CN108707723A (en) * | 2018-04-12 | 2018-10-26 | 万杨知为 | Steel-making quick slag material and its production method |
| CN110551873A (en) * | 2019-10-09 | 2019-12-10 | 王强 | harmless process for artificial diamond waste graphite powder |
| CN110551873B (en) * | 2019-10-09 | 2021-03-02 | 王强 | Harmless process for artificial diamond waste graphite powder |
| CN111893296A (en) * | 2020-09-10 | 2020-11-06 | 山东众亿赫贸易有限公司 | Hot-pressing scrap steel recarburization method and device |
| CN111893296B (en) * | 2020-09-10 | 2024-03-29 | 山西通才工贸有限公司 | Hot-pressed scrap steel carburetion method and device thereof |
| CN112853038A (en) * | 2020-12-24 | 2021-05-28 | 上海盛宝冶金科技有限公司 | Environment-friendly carbonaceous exothermic agent for steelmaking and preparation method thereof |
| CN113817918A (en) * | 2021-08-05 | 2021-12-21 | 包头钢铁（集团）有限责任公司 | Method for improving reduction expansion of high-alkali metal and high-F content pellet ore |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100355910C (en) | 2007-12-19 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LI JIZONG; DU HAO; SHOWA ELECTRIC FURNACE INDUSTR Free format text: FORMER OWNER: QINGDAO SENTIAN METAL CO., LTD.; SHOWA ELECTRIC FURNACE INDUSTRIAL CO., LTD. Effective date: 20080125 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20080125 Address after: No. 37, Zeng Guang road, Haidian District, Beijing - 2 - 1 - 19 A. zip code: 100037 Co-patentee after: Du Hao Patentee after: Li Ji - Zi Co-patentee after: Showa electric furnace Co Ltd Address before: Zip code, four building, No. 3, No. five Taiping Road, Shinan District, Qingdao, Shandong Province: zip code: 266071 Co-patentee before: Showa electric furnace Co Ltd Patentee before: Qingdao Morita Pioneer Metals Corporation |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071219 Termination date: 20201216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |