CN107904359A - A kind of refining of metal composition and its application - Google Patents

A kind of refining of metal composition and its application Download PDF

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Publication number
CN107904359A
CN107904359A CN201711379555.1A CN201711379555A CN107904359A CN 107904359 A CN107904359 A CN 107904359A CN 201711379555 A CN201711379555 A CN 201711379555A CN 107904359 A CN107904359 A CN 107904359A
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China
Prior art keywords
ball
group
metal
aluminium
parts
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CN201711379555.1A
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Chinese (zh)
Inventor
齐龙飞
齐龙威
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Tianjin Based Technology Development Co Ltd
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Tianjin Based Technology Development Co Ltd
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Priority to CN201711379555.1A priority Critical patent/CN107904359A/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0006—Adding metallic additives
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/064—Dephosphorising; Desulfurising
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention discloses a kind of refining of metal composition, its key points of the technical solution are that include metallic aluminium, aluminium oxide, calcirm-fluoride, calcium carbide, silica, rare earth, and inevitable other impurity, the time for the reaction for extending metal composites is reached, deoxidation, desulphurizing ability are improved, increases the degree of purity of molten steel.

Description

A kind of refining of metal composition and its application
Technical field
The present invention relates to metal smelt technical field, more particularly to a kind of refining of metal composition and its application.
Background technology
The primary raw material of steel-making is containing charcoal higher molten iron or the pig iron, in order to remove the impurity in molten iron, it is also necessary to Xiang Tie Oxidant, deoxidier and slag making materials, and the material such as ferroalloy are added in water, to adjust the component of steel, is finally produced The product that person goes for.
The existing Chinese patent for referring to Application No. 201510961849.X, it discloses a kind of high calcium aluminium slag ball and For its preparation method the invention discloses a kind of high calcium aluminium slag ball, it contains metallic aluminium (Al), aluminium oxide (Al2O3), silica (SiO2), calcirm-fluoride (CaF2), calcium oxide (CaO), water (H2O) and inevitably other impurity, its constituent content is by weight Number is：48~52 parts of metallic aluminium, 9~9.9 parts of aluminium oxide, 4~5 parts of silica, 5~10 parts of calcirm-fluoride, calcium oxide 20~ 24.9 parts, 0.2~0.5 part of water.
In the actual production process, the important means that Molten Steel Cleanliness is purification molten steel is improved by refining, to make steel Water reaches clean, it usually needs deoxidier is added in steelmaking process, so as to reduce the oxygen content in steel, lifts the property of steel Can, although and occurred the deoxidier for being largely used to smelting iron and steel on the market at present, the exploitation of deoxidier is still steel Important R＆D direction during iron is smelted, it is further study deoxidier configuration be still in lifting steel quality one can deeply open Hair, the direction of research.
The content of the invention
The object of the present invention is to provide a kind of refining of metal composition, play the reaction that extends metal composites when Between, deoxidation, desulphurizing ability are improved, increases the degree of purity of molten steel.
The present invention above-mentioned technical purpose technical scheme is that：A kind of refining of metal composition, Include metallic aluminium, aluminium oxide, calcirm-fluoride, calcium carbide, silica, rare earth, and inevitably other impurity.
Preferably, count in parts by weight, 45~55 parts of metallic aluminium, 8~12 parts of aluminium oxide, 8~12 parts of calcirm-fluoride, calcium carbide 20~26 parts, 16-20 parts of silica, 6-10 parts of rare earth.
Preferably, the granularity of each component is 10~50 μm in the metal composites.
Through the above technical solutions, that chooses various reasonable component and reasonable component can further increase metallic combination The oxidability of thing, suitable alkaline-earth metal addition can allow composition to have good deoxidation effect, extend metal composites Reaction time, improve deoxidation, the desulphurizing ability of alloy, improve molten steel flow, CaC2Deoxidation products be CO and CaO, Wherein CO is discharged not but not is produced field trash, and CO can promote other field trashes on from molten steel overflow process It is floating, promote white slag to float, simultaneous oxidation calcium and Al2O3Calcium aluminate slag system is combined to form, reaches the effect of rapid slagging, allows molten steel Degree of purity obtain good lifting, and the white slag to float rapidly is also convenient for clearing up.
The purpose of the present invention two：A kind of steel refining composition that is used for as described in claim 1-3 is led in metal smelt Application in domain.
The purpose of the present invention three：A kind of preparation method of high calcium aluminium slag ball, comprises the following steps：
S1：Dispensing：Metallic aluminium, aluminium oxide, calcirm-fluoride, calcium carbide, silica, rare earths material are crushed, and weighed Configure component；
S2：Batch mixing：Component weighted in S1 is mixed；
S3：Group's ball：Binding agent, and the group's of progress ball are added to the metal composites after stirred；
S4：Screening：The metal composites for having rolled into a ball good shot are screened and are separated the powder of the not group's of progress ball simultaneously The group's of re-starting ball step；
S5：Drying：The metal composites of the group's of completion ball are dried；
S6：Screening：The regulus produced in drying course is screened, and the regulus screened is crushed again, and Reenter batch mixing step；
S7：Examine storage：Recycled and stored in storage for the slag ball of size qualification.
Preferably, binding agent is bath of glass binding agent in S3.
Preferably, the addition weight of bath of glass binding agent is 0.05-0.25 times of metal composites gross weight；
Preferably, the metal composites mixed are added in high pressure comminutor by group's ball work step, and metal composites are suppressed Into the sphere for pre-setting granule size.
In conclusion the invention has the advantages that：
1st, the metal composites can also improve the shape and size of field trash, make field trash disperse and uniform, lift steel product Matter；
2nd, deoxidation products Al in CaO and molten steel2O3Low melting point calcium aluminate is combined into, and CaO combines to form calcium aluminate slag system, the slag System has higher S capacity and dross inclusion adsorption ability；
3rd, residual thing is easy to float after reacting, pollution-free to molten steel, reduces steel mill's dust emission, effectively reduces enterprise's production cost；
4th, being rationally introduced into for calcium carbide and silicon barium iron also avoid high-content aluminium in traditional high calcium aluminium slag ball and take off in metal composites The nozzle clogging that oxygen produces, improves molten steel castability；
5th, the element such as rare earth element and Ca, generates the product of dystectic tiny Dispersed precipitate in steel, they become molten steel The nucleus of early stage crystallization, makes crystal grain refinement；
6th, using the synergistic effect of multiple element, reduce the grain size of steel, microstructure thinning, sbrinkage blowhole is reduced.
Embodiment
The present invention is described in further detail below.
Embodiment 1, a kind of preparation method of high calcium aluminium slag ball, comprise the following steps：
S1：Dispensing：Metallic aluminium, aluminium oxide, calcirm-fluoride, calcium carbide, silica, rare earths material are crushed, each group after crushing Divide and reach granularity for 50 μm, and according to metallic aluminium 55Kg, aluminium oxide 12Kg, calcirm-fluoride 12Kg, calcium carbide 26Kg, silica 20Kg, the ratio and carrying out of rare earth 10Kg are weighed configuration component；
S2：Batch mixing：Component weighted in S1 is mixed；
S3：Group's ball：The group's of progress ball in high pressure comminutor is added to the metal composites after stirred, and adds binding agent, is glued The weight for tying agent is 0.25 times of metal composites gross weight, and binding agent is bath of glass binding agent, and the group's of progress ball；
S4：Screening：The metal composites for having rolled into a ball good shot are screened and are separated the powder of the not group's of progress ball simultaneously The group's of re-starting ball step；
S5：Drying：The metal composites of the group's of completion ball are dried；
S6：Screening：The regulus produced in drying course is screened, and the regulus screened is crushed again, and Reenter batch mixing step；
S7：Examine storage：Recycled and stored in storage for the slag ball of size qualification.
Embodiment 2, a kind of preparation method of high calcium aluminium slag ball, comprise the following steps：
S1：Dispensing：Metallic aluminium, aluminium oxide, calcirm-fluoride, calcium carbide, silica, rare earths material are crushed, each group after crushing Point reach granularity for 10 μm, and according to metallic aluminium 45Kg, aluminium oxide 8Kg, calcirm-fluoride 8Kg, calcium carbide 20Kg, silica 16Kg, The ratio of rare earth 6Kg simultaneously carries out configuration component of weighing；
S2：Batch mixing：Component weighted in S1 is mixed；
S3：Group's ball：The group's of progress ball in high pressure comminutor is added to the metal composites after stirred, and adds binding agent, is glued The weight for tying agent is 0.05 times of metal composites gross weight, and binding agent is bath of glass binding agent, and the group's of progress ball；
S4：Screening：The metal composites for having rolled into a ball good shot are screened and are separated the powder of the not group's of progress ball simultaneously The group's of re-starting ball step；
S5：Drying：The metal composites of the group's of completion ball are dried；
S6：Screening：The regulus produced in drying course is screened, and the regulus screened is crushed again, and Reenter batch mixing step；
S7：Examine storage：Recycled and stored in storage for the slag ball of size qualification.
Embodiment 3, a kind of preparation method of high calcium aluminium slag ball, comprise the following steps：
S1：Dispensing：Metallic aluminium, aluminium oxide, calcirm-fluoride, calcium carbide, silica, rare earths material are crushed, each group after crushing Divide and reach granularity for 30 μm, and according to metallic aluminium 50Kg, aluminium oxide 10Kg, calcirm-fluoride 10Kg, calcium carbide 23Kg, silica 18Kg, the ratio and carrying out of rare earth 8Kg are weighed configuration component；
S2：Batch mixing：Component weighted in S1 is mixed；
S3：Group's ball：The group's of progress ball in high pressure comminutor is added to the metal composites after stirred, and adds binding agent, is glued The weight for tying agent is 0.15 times of metal composites gross weight, and binding agent is bath of glass binding agent, and the group's of progress ball；
S4：Screening：The metal composites for having rolled into a ball good shot are screened and are separated the powder of the not group's of progress ball simultaneously The group's of re-starting ball step；
S5：Drying：The metal composites of the group's of completion ball are dried；
S6：Screening：The regulus produced in drying course is screened, and the regulus screened is crushed again, and Reenter batch mixing step；
S7：Examine storage：Recycled and stored in storage for the slag ball of size qualification.
Embodiment 4, a kind of preparation method of high calcium aluminium slag ball, comprise the following steps：
S1：Dispensing：Metallic aluminium, aluminium oxide, calcirm-fluoride, calcium carbide, silica, rare earths material are crushed, each group after crushing Divide and reach granularity for 10 μm, and according to metallic aluminium 55Kg, aluminium oxide 12Kg, calcirm-fluoride 12Kg, calcium carbide 20Kg, silica 16Kg, the ratio and carrying out of rare earth 6Kg are weighed configuration component；
S2：Batch mixing：Component weighted in S1 is mixed；
S3：Group's ball：The group's of progress ball in high pressure comminutor is added to the metal composites after stirred, and adds binding agent, is glued The weight for tying agent is 0.15 times of metal composites gross weight, and binding agent is bath of glass binding agent, and the group's of progress ball；
S4：Screening：The metal composites for having rolled into a ball good shot are screened and are separated the powder of the not group's of progress ball simultaneously The group's of re-starting ball step；
S5：Drying：The metal composites of the group's of completion ball are dried；
S6：Screening：The regulus produced in drying course is screened, and the regulus screened is crushed again, and Reenter batch mixing step；
S7：Examine storage：Recycled and stored in storage for the slag ball of size qualification.
Comparative example is tested
Comparative example 1：Using high calcium aluminium slag ball common on the market, it specifically comprises calcium oxide (CaO) 10Kg, metallic aluminium (Al) 40Kg, aluminium oxide (Al2O3) 20Kg, silica (SiO2) 12Kg, calcirm-fluoride (CaF2) 12Kg, calcium oxide (CaO) 20Kg.
Comparative example 2：Deoxygenation is carried out as deoxidier using Al merely.
Screw-thread steel HRB335 after deoxidation is poured into a mould, experimental sample is obtained, experimental sample is ground and is thrown After light, 2.88 μm are chosen using 200 times of light microscopes2Viewing area each sample is observed, and to field trash Analyzed.
Table 1 detects data for each embodiment and comparative example.
By upper table it can be found that the molten steel oxygen content after refining significantly decreases, while after refining Steel decrease in field trash number, and decline nearly a quarter on the field trash gross area, therefore can also judge place The monomer size of body field trash, which has, significantly to be declined, these combined influences ultimately result in the change of steel mechanics performance, increase The mechanical attribute of steel, allows steel to possess more preferable integrated quality.
This specific embodiment is only explanation of the invention, it is not limitation of the present invention, people in the art Member as needed can make the present embodiment the modification of no creative contribution after this specification is read, but as long as at this All protected in the right of invention be subject to Patent Law.

Claims (8)

  1. A kind of 1. refining of metal composition, it is characterised in that：Include metallic aluminium, aluminium oxide, calcirm-fluoride, calcium carbide, oxidation Silicon, rare earth, and inevitably other impurity.
  2. A kind of 2. refining of metal composition according to claim 1, it is characterised in that：Count in parts by weight, metallic aluminium 45 ~55 parts, 8~12 parts of aluminium oxide, 8~12 parts of calcirm-fluoride, 20~26 parts of calcium carbide, 16-20 parts of silica, 6-10 parts of rare earth.
  3. A kind of 3. refining of metal composition according to claim 1, it is characterised in that：Each component in the metal composites Granularity be 10~50 μm.
  4. 4. a kind of be used for application of the steel refining composition in metal smelt field as described in claim 1-3.
  5. A kind of 5. preparation method of high calcium aluminium slag ball, it is characterised in that：Comprise the following steps：
    S1：Dispensing：Metallic aluminium, aluminium oxide, calcirm-fluoride, calcium carbide, silica, rare earths material are crushed, and weighed Configure component；
    S2：Batch mixing：Component weighted in S1 is mixed；
    S3：Group's ball：Binding agent, and the group's of progress ball are added to the metal composites after stirred；
    S4：Screening：The metal composites for having rolled into a ball good shot are screened and are separated the powder of the not group's of progress ball simultaneously The group's of re-starting ball step；
    S5：Drying：The metal composites of the group's of completion ball are dried；
    S6：Screening：The regulus produced in drying course is screened, and the regulus screened is crushed again, and Reenter batch mixing step；
    S7：Examine storage：Recycled and stored in storage for the slag ball of size qualification.
  6. 6. the preparation method of high calcium aluminium slag ball according to claim 5, it is characterised in that：Binding agent bonds for bath of glass in S3 Agent.
  7. 7. the preparation method of high calcium aluminium slag ball according to claim 6, it is characterised in that：The addition weight of bath of glass binding agent For 0.05-0.25 times of metal composites gross weight.
  8. 8. the preparation method of high calcium aluminium slag ball according to claim 7, it is characterised in that：The metal that group's ball work step will mix Composition is added in high pressure comminutor, and metal composites are pressed into the sphere for pre-setting granule size.
CN201711379555.1A 2017-12-19 2017-12-19 A kind of refining of metal composition and its application Pending CN107904359A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111304514A (en) * 2019-12-04 2020-06-19 盐城市纽曼铸钢有限公司 Manufacturing process of high-pressure hydrogen carbon steel valve casting

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1286312A (en) * 2000-04-29 2001-03-07 幸超 Slag modifier for refining molten steel
CN103642989A (en) * 2013-11-21 2014-03-19 青岛佰众化工技术有限公司 Steel liquid purification agent
CN104630417A (en) * 2014-12-15 2015-05-20 莱芜市鲁恒冶金材料有限公司 Special desoxidant for petroleum tube steel
CN105543446A (en) * 2015-12-21 2016-05-04 北京安泰永盛金属材料有限公司 High-calcium-aluminum slag ball and preparing method thereof
CN105714020A (en) * 2016-04-06 2016-06-29 北京科技大学 Rare earth aluminum-base alloy for steelmaking deoxidization and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1286312A (en) * 2000-04-29 2001-03-07 幸超 Slag modifier for refining molten steel
CN103642989A (en) * 2013-11-21 2014-03-19 青岛佰众化工技术有限公司 Steel liquid purification agent
CN104630417A (en) * 2014-12-15 2015-05-20 莱芜市鲁恒冶金材料有限公司 Special desoxidant for petroleum tube steel
CN105543446A (en) * 2015-12-21 2016-05-04 北京安泰永盛金属材料有限公司 High-calcium-aluminum slag ball and preparing method thereof
CN105714020A (en) * 2016-04-06 2016-06-29 北京科技大学 Rare earth aluminum-base alloy for steelmaking deoxidization and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111304514A (en) * 2019-12-04 2020-06-19 盐城市纽曼铸钢有限公司 Manufacturing process of high-pressure hydrogen carbon steel valve casting
CN111304514B (en) * 2019-12-04 2021-02-05 盐城市纽曼铸钢有限公司 Manufacturing process of high-pressure hydrogen carbon steel valve casting

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Application publication date: 20180413