CN107326141A - A kind of method of molybdenum-copper - Google Patents
A kind of method of molybdenum-copper Download PDFInfo
- Publication number
- CN107326141A CN107326141A CN201710500374.3A CN201710500374A CN107326141A CN 107326141 A CN107326141 A CN 107326141A CN 201710500374 A CN201710500374 A CN 201710500374A CN 107326141 A CN107326141 A CN 107326141A
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- China
- Prior art keywords
- molybdenum
- steel
- added
- present
- tap
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Classifications
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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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- 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
Abstract
The present invention relates to a kind of method of molybdenum-copper, methods described is：When smelting molybdenum steel, by the content of molybdenum in required steel grade, useless pure molybdenum is added into molten steel when converter tapping quantity is 1/2, added when to tap being 3/4.The present invention carries out the alloying of molybdenum steel using the above method, the problem of effectively avoiding phosphorization during conventional alloys, and tapping process temperature drop≤10 DEG C, while greatly improving the recovery rate of molybdenum element, makes its recovery rate >=99%.The present invention reduces CO2 emissions and coal consumption in alloying process, reduces the harm to environment, saves the energy, greatly reduces production cost, results in good economic benefit and the high product of quality, it is adaptable to industrialization promotion.
Description
Technical field
The present invention relates to field of metallurgy, and in particular to a kind of method of molybdenum-copper.
Background technology
Molybdenum element is the only element for being applied individually to any heat resisting steel.Molybdenum steel has higher heat resistance, conventional application neck
Domain and steel grade have 12CrMo, 15CrMo (high, middle pressure steam conduit), 20CrMo (blade), and (less than 650 DEG C make 35CrMo for a long time
Part), 1Cr5Mo (less than 650 DEG C boiler tubes), (less than 650 DEG C reheaters, less than 550 DEG C erosions are strong by 1Cr9Mo
Petrochemical equipment), 1Cr12Mo (450 DEG C with lower blade) etc..
Current high molybdenum steel kind generally carries out alloying using molybdenum-iron, and molybdenum-iron is the ferroalloy of molybdenum and iron composition, typically containing molybdenum
50-60%, as the alloy addition for smelting molybdenum steel.But phosphorus element content is higher in molybdenum-iron, in alloying process is carried out
There are problems that phosphorization, and the molybdenum-iron fusing heat absorption in alloying process, be also easy to produce larger temperature drop.
Smelting the method for molybdenum steel at present mainly has two kinds：The first is that molybdenum-iron or molybdenum oxide are added into converter, is being gone out
Using surplus steel operation (during converter tapping, in order to prevent slag, 1-2 tons of molten steel will be stayed in converter) during steel, converter slag is prevented, this
Sample can avoid the phosphorization in tapping process alloying, but general (the band iron in vessel slag 90% or so of recovery rate of molybdenum element
And molybdenum element), cost is higher；Second is that molybdenum-iron is added in converter tapping process, can so improve receiving for molybdenum element
Rate, but have and can produce the too high steel scrap of the high composition of phosphorus in phosphorization and big two problems of temperature drop, actual smelting process or produce it
His production accident.
The content of the invention
In order to solve the above technical problems, the invention provides a kind of method of molybdenum-copper, molybdenum-copper can be made
During not phosphorization, temperature drop≤10 DEG C, and recovery rate >=99% of molybdenum element.
For up to this purpose, the present invention uses following technical scheme：
The invention provides a kind of method of molybdenum-copper, methods described is：When smelting molybdenum steel, by required steel grade
The content of molybdenum, molten steel is added when converter tapping quantity is 1/2 by useless pure molybdenum, is added when to tap being 3/4.
The present invention carries out molybdenum-copper from the pure molybdenum that gives up as raw material, effectively avoids increasing during conventional alloys
The problem of phosphorus；And there is no ferro element in tapping process in pure molybdenum, only molybdenum element fusing heat absorption enters to make temperature drop≤10 DEG C；From
The operation added when tap is 1/2 plus when molybdenum and tap are 3/4, can greatly improve the recovery rate of molybdenum element, make
Its recovery rate >=99%.And then cost is reduced, obtain good economic benefit and the high product of quality.
Pure molybdenum price of the present invention of giving up is low, can be obtained by purchased in market.
According to the present invention, temperature >=1610 DEG C of the converter tapping for example can be 1610 DEG C, 1620 DEG C, 1630 DEG C,
1640 DEG C, 1650 DEG C, 1660 DEG C, 1670 DEG C, 1680 DEG C or 1690 DEG C etc., and other specific point values more than 1610 DEG C, can
It is adjusted according to actual situation about smelting.
According to the present invention, useless pure molybdenum is cut into 0.5kg/ blocks by the pure molybdenum that gives up using 0.5kg/ blocks are preceding precut into
Alloying is carried out, is conducive to uniform melt, can effectively reduce temperature drop during alloying, while reducing fusing time, smelting is improved
Refine efficiency.
The present invention does not do particular determination to the addition for giving up pure molybdenum, should be according to the content of molybdenum in required steel grade
The addition of the useless pure molybdenum of selection.
The method of molybdenum-copper of the present invention is that species and the addition side of raw material are defined when smelting molybdenum steel
Formula, and and non-limiting whole molybdenum steel smelting process, the operation that other smelting operations should be conventional according to this area carries out, not
Constitute the concrete restriction to the present invention.
As preferred technical scheme, the method for molybdenum-copper of the present invention comprises the following steps：
(1) useless pure molybdenum is being used into the block for being preceding precut into 0.5kg/ blocks；
(2) temperature >=1610 DEG C of converter tapping are controlled, are 1/2 in converter tapping quantity by the content of molybdenum in required steel grade
When useless pure molybdenum is added into molten steel, added when to tap being 3/4；
(3) proceed subsequent smelting step, obtain molybdenum steel.
Compared with prior art, the present invention at least has the advantages that：
(1) the not phosphorization during molybdenum-copper, tapping process temperature drop≤10 DEG C, molybdenum element recovery rate >=99%.
(2) present invention carries out alloying as raw material from the pure molybdenum that gives up and significantly reduces production cost, with being closed using pure molybdenum
Aurification is compared, and ton steel, which often increases 0.01% molybdenum element cost, can reduce 3-7 members；Compared with using molybdenum-iron (molybdenum oxide), molybdenum element is received
Yield is high by 5% or so, and ton steel, which often increases by 0.1% molybdenum element cost, reduces by 10 yuan.
(3) compared with using molybdenum-iron, 4.267 tons of CO2 emissions can be reduced by carrying out alloying using one ton of useless pure molybdenum
Amount, while reducing by 480.07 tons of coal consumptions, reduces the harm to environment, saves the energy, reduce production cost.
Embodiment
For ease of understanding the present invention, it is as follows that the present invention enumerates embodiment.Those skilled in the art are it will be clearly understood that the implementation
Example is only to aid in understanding the present invention, is not construed as the concrete restriction to the present invention.
The present invention provides a kind of method of molybdenum-copper in specific embodiment part, and methods described is：Smelting molybdenum
During steel, by the content of molybdenum in required steel grade, useless pure molybdenum is added into molten steel when converter tapping quantity is 1/2, when to tap being 3/4
Add.
It is below the typical but non-limiting embodiment of the present invention：
Embodiment 1
(1) useless pure molybdenum is being used into the block for being preceding precut into 0.5kg/ blocks；
(2) temperature for controlling converter tapping is 1610 DEG C, is 1/2 in converter tapping quantity by the content of molybdenum in required steel grade
When useless pure molybdenum is added into molten steel, added when to tap being 3/4；
(3) proceed subsequent smelting step, obtain molybdenum steel.
By detection, alloying process temperature drop is 5%, and the recovery rate of molybdenum element is 99.3%.
Embodiment 2
(1) useless pure molybdenum is being used into the block for being preceding precut into 0.5kg/ blocks；
(2) temperature for controlling converter tapping is 1650 DEG C, is 1/2 in converter tapping quantity by the content of molybdenum in required steel grade
When useless pure molybdenum is added into molten steel, added when to tap being 3/4；
(3) proceed subsequent smelting step, obtain molybdenum steel.
By detection, alloying process temperature drop is 7%, and the recovery rate of molybdenum element is 99.4%.
Embodiment 3
(1) useless pure molybdenum is being used into the block for being preceding precut into 0.5kg/ blocks；
(2) temperature for controlling converter tapping is 1630 DEG C, is 1/2 in converter tapping quantity by the content of molybdenum in required steel grade
When useless pure molybdenum is added into molten steel, added when to tap being 3/4；
(3) proceed subsequent smelting step, obtain molybdenum steel.
By detection, alloying process temperature drop is 6%, and the recovery rate of molybdenum element is 99.3%.
Comparative example 1
(1) useless pure molybdenum is being used into the block for being preceding precut into 0.5kg/ blocks；
(2) by the content of molybdenum in required steel grade, useless pure molybdenum is added in converter and carries out alloying, after the completion of alloying
Tapped at 1610 DEG C, using surplus steel operation during tapping.
By detection, the recovery rate of molybdenum element is 89.8%
Comparative example 2
(1) molybdenum-iron is being used into the block for being preceding precut into 0.5kg/ blocks；
(2) temperature for controlling converter tapping is 1610 DEG C, is 1/2 in converter tapping quantity by the content of molybdenum in required steel grade
When molybdenum-iron is added into molten steel, to tap be 3/4 when add；
(3) proceed subsequent smelting step, obtain molybdenum steel.
By detection, there is phosphorization phenomenon in gained molybdenum steel, alloying process temperature drop is 18%, and the recovery rate of molybdenum element is
99.3%.
Comparative example 3
Compared with implementing 1, except " the pure molybdenum that will be given up when converter tapping quantity is 1/2 adds molten steel " is replaced with " in converter
Useless pure molybdenum is added into molten steel when tap is 1/3 " outside, other conditions are identical with embodiment 1.
By detection, the recovery rate of molybdenum element is 97.2%.
Comparative example 4
Compared with implementing 1, except " the pure molybdenum that will be given up when converter tapping quantity is 1/2 adds molten steel " is replaced with " in converter
Useless pure molybdenum is added into molten steel when tap is 3/5 " outside, other conditions are identical with embodiment 1.
By detection, the recovery rate of molybdenum element is 96.5%.
Comparative example 5
Compared with implementing 1, except will in addition to while being 3/4 " to tap add " replace with while being 3/5 " to tap add ",
Other conditions are identical with embodiment 1.
By detection, the recovery rate of molybdenum element is 95.3%.
Comparative example 6
Compared with implementing 1, except will in addition to while being 3/4 " to tap add " replace with while being 4/5 " to tap add ",
Other conditions are identical with embodiment 1.
By detection, the recovery rate of molybdenum element is 97.0%.
Applicant states that the present invention illustrates detailed process equipment and the technological process of the present invention by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, do not mean that the present invention has to rely on above-mentioned detailed
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (4)
1. a kind of method of molybdenum-copper, it is characterised in that methods described is：When smelting molybdenum steel, by molybdenum in required steel grade
Content, useless pure molybdenum is added into molten steel when converter tapping quantity is 1/2, added when to tap being 3/4.
2. the method as described in claim 1, it is characterised in that temperature >=1610 DEG C of the converter tapping.
3. method as claimed in claim 1 or 2, it is characterised in that the pure molybdenum that gives up is using being preceding precut into 0.5kg/ blocks.
4. the method as described in claim any one of 1-3, it is characterised in that the described method comprises the following steps：
(1) useless pure molybdenum is being used into the block for being preceding precut into 0.5kg/ blocks；
(2) temperature >=1610 DEG C of converter tapping are controlled, will when converter tapping quantity is 1/2 by the content of molybdenum in required steel grade
Useless pure molybdenum adds molten steel, is added when to tap being 3/4；
(3) proceed subsequent smelting step, obtain molybdenum steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710500374.3A CN107326141A (en) | 2017-06-27 | 2017-06-27 | A kind of method of molybdenum-copper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710500374.3A CN107326141A (en) | 2017-06-27 | 2017-06-27 | A kind of method of molybdenum-copper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107326141A true CN107326141A (en) | 2017-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710500374.3A Pending CN107326141A (en) | 2017-06-27 | 2017-06-27 | A kind of method of molybdenum-copper |
Country Status (1)
| Country | Link |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120352A (en) * | 2014-07-30 | 2014-10-29 | 攀钢集团西昌钢钒有限公司 | 34CrMo4 gas cylinder steel and production method thereof |
| CN105177427A (en) * | 2015-10-21 | 2015-12-23 | 攀钢集团西昌钢钒有限公司 | Steel for 30CrMo gas cylinders and production method thereof |
-
2017
- 2017-06-27 CN CN201710500374.3A patent/CN107326141A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120352A (en) * | 2014-07-30 | 2014-10-29 | 攀钢集团西昌钢钒有限公司 | 34CrMo4 gas cylinder steel and production method thereof |
| CN105177427A (en) * | 2015-10-21 | 2015-12-23 | 攀钢集团西昌钢钒有限公司 | Steel for 30CrMo gas cylinders and production method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 郭培民等: "《冶金资源高效利用》", 30 September 2012, 冶金工业出版社 * |
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Application publication date: 20171107 |