CN103276272B - High Rare Earth Lanthanum Silcaz - Google Patents
High Rare Earth Lanthanum Silcaz Download PDFInfo
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- CN103276272B CN103276272B CN201310176396.0A CN201310176396A CN103276272B CN 103276272 B CN103276272 B CN 103276272B CN 201310176396 A CN201310176396 A CN 201310176396A CN 103276272 B CN103276272 B CN 103276272B
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Abstract
The invention discloses a kind of high Rare Earth Lanthanum Silcaz, does the mass percentage of chemical composition comprise: La? 27 ~ 31%, Si? 34 ~ 40%, Ca? 16 ~ 20% and Fe? 9.6 ~ 14.1%; The raw material preparing described high Rare Earth Lanthanum Silcaz comprises: mass percentage be 20% ~ 35% rare earth lanthanum, mass percentage be 55% ~ 75% silicocalcium and mass percentage be the steel scrap of 5% ~ 20%; La mass percentage >=99% in described rare earth lanthanum; In described silicocalcium, Si mass percentage is 50 ~ 65%, Ca mass percentage is 24 ~ 31%.High Rare Earth Lanthanum Silcaz Chemical Composition ratio of the present invention is suitable, and chemical composition is even and stable, and the Rare Earth Lanthanum recovery rate in steel reaches more than 19% ,-20 DEG C of impact property A
kvat more than 190J, plasticity and toughness higher, and cost is low.
Description
Technical field
The present invention relates to metallurgical technology field, specifically, relate to a kind of high Rare Earth Lanthanum Silcaz.
Background technology
Rare earth alloy product, can be divided into two large classifications: one is thick rare earth alloy, and as rare earth ferrosilicon alloy, rare earth magnesium ferrosilicon alloy etc., mainly with rare earth slag charge, norium is raw material production, and impurity is more.Be mainly used in cast steel and iron casting field.Two is smart rare earth alloies, and its content of rare earth is higher, and impurity is less, and as neodymium-iron alloy (Nd-Fe) etc., but such alloy is mainly used in the fields such as magneticsubstance, is not also applied to field of steel-making at present.
When at present both at home and abroad " rare earth steel " is produced, because sulphur in steel, oxygen level are high, add technique discomfort, RE alloyed recovery rate is only 5%-10%, most oxidized scaling loss or form inclusion floating and fall.When " rare earth steel " is produced both at home and abroad, mostly the rare earth material added is " norium ", and each metal proportioning fluctuation is comparatively large, not fairly obvious in steel interalloy effect, also belongs to " extensive style " application of rare earth.When " rare earth steel " is produced at present, adopt feeding wire machine to feed mishmetal cored-wire in ladle, rare earth recovery rate is only about 5%.About 250000 yuan/ton about per ton of mishmetal cored-wire price, ton steel cost 50 yuan.
In recent years, take Clean Steel as platform, under super low sulfur, Ultra Low-oxygen situation, add rare earth alloys, improve rare earth recovery rate, give full play to RE alloyed effect, exploitation special purpose steel become the technology trends and technical research focus pursued countries in the world.The state-owned research institutions such as Japan, Sweden have carried out the research work of single rare earth metal at refining application of RE in the steel.Nippon company rare earth replaces part aluminium, utilizes the soft feature of REAl203 alloy, alleviates and be mingled with harm, produce super-silent bearing steel.The patent of JFE company of Japan: carrying out adding Ca-RE-Ti-Fe alloy etc. in Ti-containing steel production process after RH (RuhstahlhausenProcess) process.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of high Rare Earth Lanthanum Silcaz, makes the Rare Earth Lanthanum recovery rate in steel reach more than 19%.
Technical scheme of the present invention is as follows:
A kind of high Rare Earth Lanthanum Silcaz, the mass percentage of chemical composition comprises: La27 ~ 31%, Si34 ~ 40%, Ca16 ~ 20% and Fe9.6 ~ 14.1%; The raw material preparing described high Rare Earth Lanthanum Silcaz comprises: mass percentage be 20% ~ 35% rare earth lanthanum, mass percentage be 55% ~ 75% silicocalcium and mass percentage be the steel scrap of 5% ~ 20%; La mass percentage >=99% in described rare earth lanthanum; In described silicocalcium, Si mass percentage is 50 ~ 65%, Ca mass percentage is 24 ~ 31%.
Further: La mass percentage is 27.26%, Si mass percentage is 38.90%, Ca mass percentage be 19.42% and Fe mass percentage be 11.7%.
Further: La mass percentage is 30.28%, Si mass percentage is 35.64%, Ca mass percentage be 16.85% and Fe mass percentage be 13.2%.
Further: La mass percentage is 28.86%, Si mass percentage is 39.12%, Ca mass percentage be 17.84% and Fe mass percentage be 12.6%.
Further: La mass percentage is 31.00%, Si mass percentage is 34.00%, Ca mass percentage be 16.00% and Fe mass percentage be 18.1%.
Further: La mass percentage is 27.00%, Si mass percentage is 40.00%, Ca mass percentage be 20.00% and Fe mass percentage be 12.3%.
Further: the lumpiness of described steel scrap is 50 ~ 100mm.
Technique effect of the present invention is as follows:
1, the Rare Earth Lanthanum recovery rate of high Rare Earth Lanthanum Silcaz of the present invention in steel reaches more than 19% ,-20 DEG C of impact property A
kvat more than 190J, plasticity and toughness higher.
2, high Rare Earth Lanthanum Silcaz of the present invention has higher content of rare earth, and Chemical Composition ratio is suitable, and chemical composition is even and stable, and cost is low.
Embodiment
The present invention according to batching, melting, cast, fragmentation and packaging step produce high Rare Earth Lanthanum Silcaz.
The raw material preparing high Rare Earth Lanthanum Silcaz comprises: rare earth lanthanum, silicocalcium and steel scrap.Wherein, La mass percentage >=99% in rare earth lanthanum.In silicocalcium, Si mass percentage is 50 ~ 65%, Ca mass percentage is 24 ~ 31%.The lumpiness of steel scrap is 50 ~ 100mm.Steel scrap surface clean is without greasy dirt.Above-mentioned raw materials is prepared burden according to the mass percentage of the chemical composition of high Rare Earth Lanthanum Silcaz.The mass percentage of the chemical composition of high Rare Earth Lanthanum Silcaz is: La27 ~ 31%, Si34 ~ 40%, Ca16 ~ 20% and Fe9.6 ~ 14.1%, and all the other are impurity.Therefore, the mass percentage proportioning of above-mentioned raw materials is: rare earth lanthanum is 30% ~ 32%, silicocalcium be 58% ~ 65% and steel scrap be 5% ~ 10%.The raw materials cost of high Rare Earth Lanthanum Silcaz is: rare earth lanthanum 80000 yuan/ton, silicocalcium 10000 yuan/ton and steel scrap 2000 yuan/ton.Rare earth alloy cost price per ton 50000 yuan (containing tax) is 20% of mishmetal cored-wire.Therefore, adopt raw material of the present invention, cost is lower.
The food ingredient of raw material is as shown in table 1.By the raw material after batching, add in medium-frequency induction furnace with certain addition sequence successively, be heated to 1500 ~ 1600 DEG C, make melting sources, stir 3 ~ 5min, make rare earth lanthanum be evenly distributed in steel, scum.Raw material addition sequence is: steel scrap, silicocalcium and rare earth lanthanum.Before adding rare earth lanthanum, add muriate series protection slag, as the insulating covering agent smelted.The requirement of the chemical composition foundation covering slag physical and chemical performance of this muriate series protection slag, suitable fusing point and viscosity etc. are because usually determining.The mass percentage of the chemical composition of muriate series protection slag comprises: CaCl
229.6% ~ 32.8%, SiO
214.4% ~ 16.4%, CaO32.6% ~ 34.5% and CaF
216.1% ~ 21.4%, all the other are impurity.The specific chemical composition of each embodiment muriate used series protection slag is as shown in table 2.After alloy melting, add covering slag at its liquid level, uniform protective membrane can be formed, effectively stop after adding rare earth and oxidizing reaction occurs, improve rare earth recovery rate.After cast, the chemical composition of product is as shown in table 3.
The food ingredient (mass percentage wt%) that each embodiment of table 1 is raw materials used
The chemical composition (mass percentage wt%) of each embodiment of table 2 muriate series protection slag used
The chemical composition (mass percentage wt%) of each embodiment of table 3
After melting, alloy is poured in wharve and pours into a mould.After pouring the alloy cooling in alloy wharve into, be crushed to suitable particle size (5-30mm) and obtained the finished product, packed by customer need.
Production is obtained high Rare Earth Lanthanum Silcaz to join in Q460C steel.Table 4 and table 5 are rare earth recovery rate in Q460C steel of the product of each embodiment and service check result respectively.
The rare earth recovery rate of product in Q460C steel of table 4 embodiment
Table 5 embodiment Q460C steel product service check result
* be low temperature impact properties in structural low alloy steel national standard
As can be seen from table 4 and table 5, the Rare Earth Lanthanum recovery rate of high Rare Earth Lanthanum Silcaz of the present invention in steel reaches more than 19% ,-20 DEG C of impact property A
kvat more than 190J, plasticity and toughness higher.
Claims (6)
1. a high Rare Earth Lanthanum Silcaz, is characterized in that, the mass percentage of chemical composition comprises: La27 ~ 31%, Si34 ~ 40%, Ca16 ~ 20% and Fe9.6 ~ 14.1%; The raw material preparing described high Rare Earth Lanthanum Silcaz comprises: mass percentage be 20% ~ 35% rare earth lanthanum, mass percentage be 55% ~ 75% silicocalcium and mass percentage be the steel scrap of 5% ~ 20%; La mass percentage >=99% in described rare earth lanthanum; In described silicocalcium, Si mass percentage is 50 ~ 65%, Ca mass percentage is 24 ~ 31%.
2. high Rare Earth Lanthanum Silcaz as claimed in claim 1, is characterized in that: La mass percentage is 27.26%, Si mass percentage is 38.90%, Ca mass percentage be 19.42% and Fe mass percentage be 11.7%.
3. high Rare Earth Lanthanum Silcaz as claimed in claim 1, is characterized in that: La mass percentage is 30.28%, Si mass percentage is 35.64%, Ca mass percentage be 16.85% and Fe mass percentage be 13.2%.
4. high Rare Earth Lanthanum Silcaz as claimed in claim 1, is characterized in that: La mass percentage is 28.86%, Si mass percentage is 39.12%, Ca mass percentage be 17.84% and Fe mass percentage be 12.6%.
5. high Rare Earth Lanthanum Silcaz as claimed in claim 1, is characterized in that: La mass percentage is 27.00%, Si mass percentage is 40.00%, Ca mass percentage be 20.00% and Fe mass percentage be 12.3%.
6. high Rare Earth Lanthanum Silcaz as claimed in claim 1, is characterized in that: the lumpiness of described steel scrap is 50 ~ 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310176396.0A CN103276272B (en) | 2013-05-14 | 2013-05-14 | High Rare Earth Lanthanum Silcaz |
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| CN201310176396.0A CN103276272B (en) | 2013-05-14 | 2013-05-14 | High Rare Earth Lanthanum Silcaz |
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| CN103276272A CN103276272A (en) | 2013-09-04 |
| CN103276272B true CN103276272B (en) | 2015-12-02 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061802A (en) * | 1991-12-03 | 1992-06-10 | 江西省乌石山铁矿 | Lanthanum base rare earth (magnesium) ferro-silicon and smelting technology thereof |
| CN1718816A (en) * | 2005-07-29 | 2006-01-11 | 龙南县龙钇重稀土材料有限责任公司 | Yttrium base rare earth silicon calcium iron alloy, its preparation method and use |
-
2013
- 2013-05-14 CN CN201310176396.0A patent/CN103276272B/en not_active Withdrawn - After Issue
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061802A (en) * | 1991-12-03 | 1992-06-10 | 江西省乌石山铁矿 | Lanthanum base rare earth (magnesium) ferro-silicon and smelting technology thereof |
| CN1718816A (en) * | 2005-07-29 | 2006-01-11 | 龙南县龙钇重稀土材料有限责任公司 | Yttrium base rare earth silicon calcium iron alloy, its preparation method and use |
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| CN103276272A (en) | 2013-09-04 |
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