CN110408836A - A kind of molybdenum oxide composite pellet and its preparation method and application - Google Patents
A kind of molybdenum oxide composite pellet and its preparation method and application Download PDFInfo
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- CN110408836A CN110408836A CN201910803607.6A CN201910803607A CN110408836A CN 110408836 A CN110408836 A CN 110408836A CN 201910803607 A CN201910803607 A CN 201910803607A CN 110408836 A CN110408836 A CN 110408836A
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/006—Making ferrous alloys compositions used for making ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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Abstract
The present invention discloses a kind of molybdenum oxide composite pellet and its preparation method and application, and including ball and the spherical shell being attached on ball, the constituent of the ball includes inhibitor, molybdenum oxide powder, reducing agent and binder；The constituent of the spherical shell includes inhibitor, molybdenum oxide powder, reducing agent and binder；The content of inhibitor is less than the content of inhibitor in spherical shell in ball.Molybdenum oxide composite pellet of the invention is applied to the smelting that amount containing molybdenum is 0.001wt%~15wt% steel grade.The composite pellet that the present invention obtains, which is blended in molten steel, smelt just achievable, and operating cost is cheap, can largely reduce the volatilization loss amount of molybdenum oxide, and then improve the molybdenum yield of steel alloy, has the characteristics that smelting energy-output ratio is few, smelting cost is low.
Description
Technical field
The invention belongs to molybdenum oxide DIRECT ALLOYING field of steel-making, a kind of molybdenum oxide composite pellet and its preparation are referred primarily to
Methods and applications.
Background technique
In traditional smelting process, generally use additive of the molybdenum-iron as smelting Mo-contained alloy steel, but molybdenum-iron smelt at
This height, and production process will cause environmental pollution, in this case, metallargist develops using cheap primary raw materials
Alloy addition of the molybdenum trioxide as molybdenum mitigates carrying capacity of environment to reduce production cost.Molybdenum-iron is replaced using molybdenum trioxide
DIRECT ALLOYING, in foreign applications than wide.China starts molybdenum trioxide and starts instead of the experiment work of molybdenum-iron steel-making
In in the 1920s, but most domestic research is carried out under the conditions of electric-arc furnace steelmaking, and be all outside molybdenum trioxide
It is used in conjunction with reducing agent to realize DIRECT ALLOYING.Replace ferro-molybdenum with molybdenum oxide, reduces smelting cost, save smelting
The process of ferroalloy, it is a large amount of energy saving.But the fusing point of molybdenum trioxide and boiling point are all relatively low, and at 600 DEG C, molybdenum trioxide
Distillation is had begun, as temperature increases, distillation phenomenon is aggravated, and causes the loss of molybdenum element.
Currently, molybdenum oxide steel-making both at home and abroad mainly uses inhibitor of the calcium oxide as molybdenum oxide, external steel mill is by three oxygen
Change molybdenum and calcium carbonate Hybrid Heating, molten steel is added in the calcium molybdate for being made stable and not volatile, and domestic steel mill then generally takes three
The mode that molybdenum oxide and lime are mixed makes steel (Yang Ruining, Xue Zhengliang, Wang Gongliang etc., for the molybdenum of steelmaking alloy or the oxygen of vanadium
The preparation method of compound briquetting: CN102605140A [P] .2012；Yang Honggang, Li Jianmin, Wang Jianchang etc., a kind of molybdenum oxide mixing
The method of briquetting DIRECT ALLOYING: CN103469049A [P] .2013；Ma Chuanqing, Wu Bing, Yang Bo etc., molybdenum oxide DIRECT ALLOYING
The method of steel-making: CN103627846A [P] .2014；).Although reducing the volatilization of molybdenum trioxide, molybdenum yield is slightly elevated,
But since when in use, the initial volatile quantity of molybdenum trioxide is big, and inhibitor quickly can not capture molybdenum oxide and cause partial loss,
Still it is unable to satisfy iron and steel enterprise's requirement.
Summary of the invention
The purpose of the present invention is to provide a kind of molybdenum oxide composite pellets and its preparation method and application, to solve three oxidations
The problem of molybdenum distils volatilization in high temperature steelmaking process, and molybdenum is caused to lose.
The technical solution adopted by the invention is as follows:
A kind of molybdenum oxide composite pellet, including ball and the spherical shell being attached on ball, the constituent packet of the ball
Include inhibitor, molybdenum oxide powder, reducing agent and binder；The constituent of the spherical shell includes inhibitor, molybdenum oxide powder, reducing agent
And binder；
The content of inhibitor is less than the content of inhibitor in spherical shell in ball.
In ball, inhibitor content is the 2%-4% of molybdenum oxide powder quality, and reduction agent content is molybdenum oxide powder quality
5%-8%, binder content are the 0.2%-1.2% of molybdenum oxide powder quality.
In spherical shell, inhibitor content is the 6%-10% of molybdenum oxide powder quality, and reduction agent content is molybdenum oxide powder quality
10%-25%, binder content are the 0.6%-1.4% of molybdenum oxide powder quality.
Inhibitor is using the mixture of one or both of calcium oxide and barium monoxide, and wherein calcium oxide is from hydroxide
The mixture of one or both of calcium and calcium carbonate；Barium monoxide is from one or both of barium hydroxide and barium carbonate
Mixture.
Reducing agent uses the mixture of one or more of semi-coke, coke, bituminous coal, anthracite and lignite.
Binder uses the mixture of one or more of waterglass, bentonite and carboxymethyl cellulose.
Ball diameter is 4-10mm, and spherical shell diameter is 10-18mm, and the volume ratio of ball and spherical shell is (1:2)-(1:4).
In ball and spherical shell, inhibitor, molybdenum oxide powder, reducing agent and binder granularity in 100-200 mesh.
A kind of preparation method of molybdenum oxide composite pellet, includes the following steps:
The raw material of ball is sufficiently mixed by S1, obtains ball using disk pelletizing or pressure pelletizing；
The raw material of spherical shell is sufficiently mixed by S2, and spherical shell raw material is attached on ball using disk pelletizing or pressure pelletizing,
Spherical shell is formed, molybdenum oxide composite pellet is then dried to obtain.
A kind of application of molybdenum oxide composite pellet, the molybdenum oxide composite pellet be applied to amount containing molybdenum for 0.001wt%~
The smelting of 15wt% steel grade.
Compared with prior art, the invention has the following advantages:
Molybdenum oxide composite pellet of the invention is less than in spherical shell using the content of inhibitor in spherical shell package ball, ball and is pressed down
The content of preparation, by being attached on ball and being formed spherical shell for the molybdenum oxide mixture of high level inhibitor, so that oxidation
Molybdenum volatile quantity reduces, and not only solves the volatile problem of molybdenum oxide, and can be improved the molybdenum yield of steel alloy.
In the preparation, the raw material of ball is sufficiently mixed for molybdenum oxide composite pellet of the present invention, utilizes disk pelletizing or pressure
Pelletizing obtains ball；The raw material of spherical shell is sufficiently mixed, spherical shell raw material is attached to ball using disk pelletizing or pressure pelletizing
On, spherical shell is formed, molybdenum oxide composite pellet is obtained.It can thus be seen that the preparation process is simple and convenient.
It, can when molybdenum oxide composite pellet of the present invention is applied to the smelting that amount containing molybdenum is 0.001wt%~15wt% steel grade
Effectively inhibit the volatilization of molybdenum oxide, molybdenum recovery is 97.35%~98.86%.
Specific embodiment
Below with reference to embodiment, the present invention is described further.
Molybdenum oxide composite pellet of the present invention is using segregation ingredient and twice prepared by balling-up mode, includes the following steps:
Step 1: sieve to molybdenum oxide powder, inhibitor, reducing agent, Control granularity, then will be compared in 100-200 mesh
Low content inhibitor, molybdenum oxide powder, reducing agent and binder are sufficiently mixed by a certain percentage, obtain mixture A, and utilize disk
Mixture A is made as pelletizing core (i.e. ball) by pelletizer or ball press；Step 2: being restored to molybdenum oxide powder, inhibitor core
Agent is sieved, then inhibitor, molybdenum oxide powder, reducing agent and binder are sufficiently mixed by Control granularity in 100-200 mesh,
Mixture B is obtained, mixture B is attached on ball using disc balling machine or ball press, it is dry to be finally putting into drying box
To molybdenum oxide composite pellet.Wherein, in mixture B inhibitor content be higher than mixture A in inhibitor content.
As the preferred embodiment of the invention, in ball, inhibitor content is the 2%-4% of molybdenum oxide powder quality, also
Former agent content is the 5%-8% of molybdenum oxide powder quality, and binder content is the 0.2%-1.2% of molybdenum oxide powder quality；In spherical shell
Inhibitor content is the 6%-10% of molybdenum oxide powder quality, and reduction agent content is the 10%-25% of molybdenum oxide powder quality, binder
Content is the 0.6%-1.4% of molybdenum oxide powder quality.
As the preferred embodiment of the invention, ball diameter is 4-10mm；Spherical shell diameter is 10-18mm, is finally obtained
Molybdenum oxide composite pellet in the volume ratio of ball and spherical shell be (1:2)-(1:4).
As the preferred embodiment of the invention, the inhibitor of selection is one or both of calcium oxide and barium monoxide
Mixture, wherein calcium oxide is from one or both of calcium hydroxide and calcium carbonate mixture；Barium monoxide is from hydrogen-oxygen
Change the mixture of one or both of barium and barium carbonate.
As the preferred embodiment of the invention, reducing agent is one of semi-coke, coke, bituminous coal, anthracite and lignite
Or several mixture.
As the preferred embodiment of the invention, the binder of selection uses waterglass, bentonite and carboxymethyl cellulose
One or more of mixture.
Molybdenum oxide composite pellet of the present invention can be applied to the smelting of 0.001%~15% steel grade of amount containing molybdenum.When in use, will
The molybdenum oxide composite pellet that the present invention obtains is filled into electric arc furnaces, after adding solid iron and steel stock, is blended into molten iron, is carried out smelting
Refining.
Embodiment 1
The present embodiment is applied to 80 tons of electric furnace smelting 0.15wt% containing molybdenum~0.25wt% 20CrNiMoH steel grades.Specifically
Step are as follows:
1) first to molybdenum oxide powder (pure material), inhibitor (calcium oxide), reducing agent (semi-coke) and binder (waterglass) into
Row screening, Control granularity is in 100-200 mesh.
2) molybdenum oxide powder, inhibitor, reducing agent and binder are sufficiently mixed, and utilize disc balling machine or pressure ball mechanism
Ball is obtained, ball diameter is 4mm；Wherein inhibitor quality is the 2% of molybdenum oxide powder quality, and reducing agent quality is molybdenum oxide
The 5% of silty amount, binder quality are the 0.2% of molybdenum oxide powder quality.
3) molybdenum oxide powder, inhibitor, reducing agent and binder are sufficiently mixed, using disk pelletizing or pressure pelletizing by ball
Husk as raw material is attached on ball, is formed spherical shell, is then dried to obtain molybdenum oxide composite pellet, wherein spherical shell volume/ball volume
Than for 2:1；Wherein, inhibitor quality is the 6% of molybdenum oxide powder quality, and reducing agent quality is the 10% of molybdenum oxide powder quality, is glued
Tie 0.6% that agent quality is molybdenum oxide powder quality.
4) molybdenum oxide composite pellet obtained is filled into electric arc furnaces, after adding solid iron and steel stock, is blended into molten iron, into
Row is smelted, and the molybdenum content of the high molybdenum alloy steel of gained is 2.5wt%, and molybdenum recovery reaches 97.35%.
Embodiment 2
The present embodiment is applied to 80 tons of electric furnace smelting 0.15wt% containing molybdenum~0.25wt% 20CrNiMoH steel grades.Specifically
Step are as follows:
1) first to molybdenum oxide powder (pure material), inhibitor (barium monoxide), reducing agent (coke) and binder (bentonite) into
Row screening, Control granularity is in 100-200 mesh.
2) molybdenum oxide powder, inhibitor, reducing agent and binder are sufficiently mixed, and utilize disc balling machine or pressure ball mechanism
Ball is obtained, ball diameter is 7mm；Wherein inhibitor quality is the 3% of molybdenum oxide powder quality, and reducing agent quality is molybdenum oxide
The 6.5% of silty amount, binder quality are the 0.7% of molybdenum oxide powder quality.
3) molybdenum oxide powder, inhibitor, reducing agent and binder are sufficiently mixed, using disk pelletizing or pressure pelletizing by ball
Husk as raw material is attached on ball, is formed spherical shell, is then dried to obtain molybdenum oxide composite pellet, wherein spherical shell volume/ball volume
Than for 3:1；Wherein, inhibitor quality is the 8% of molybdenum oxide powder quality, and reducing agent quality is the 17.5% of molybdenum oxide powder quality,
Binder quality is the 1.0% of molybdenum oxide powder quality.
4) molybdenum oxide composite pellet obtained is filled into electric arc furnaces, after adding solid iron and steel stock, is blended into molten iron, into
Row is smelted, and the molybdenum content of the high molybdenum alloy steel of gained is 3.24wt%, and molybdenum recovery reaches 97.86%.
Embodiment 3
The present embodiment is applied to 80 tons of electric furnace smelting 0.15wt% containing molybdenum~0.25wt% 20CrNiMoH steel grades.Specifically
Step are as follows:
1) first to molybdenum oxide powder (pure material), inhibitor (mixture of calcium oxide and barium monoxide), reducing agent (bituminous coal) and
Binder (carboxymethyl cellulose) is sieved, and Control granularity is in 100-200 mesh.
2) molybdenum oxide powder, inhibitor, reducing agent and binder are sufficiently mixed, and utilize disc balling machine or pressure ball mechanism
Ball is obtained, ball diameter is 10mm；Wherein inhibitor quality is the 4% of molybdenum oxide powder quality, and reducing agent quality is oxidation
The 8% of molybdenum powder quality, binder quality are the 1.2% of molybdenum oxide powder quality.
3) molybdenum oxide powder, inhibitor, reducing agent and binder are sufficiently mixed, using disk pelletizing or pressure pelletizing by ball
Husk as raw material is attached on ball, is formed spherical shell, is then dried to obtain molybdenum oxide composite pellet, wherein spherical shell volume/ball volume
Than for 4:1；Wherein, inhibitor quality is the 10% of molybdenum oxide powder quality, and reducing agent quality is the 25% of molybdenum oxide powder quality, is glued
Tie 1.4% that agent quality is molybdenum oxide powder quality.
4) molybdenum oxide composite pellet obtained is filled into electric arc furnaces, after adding solid iron and steel stock, is blended into molten iron, into
Row is smelted, and the molybdenum content of the high molybdenum alloy steel of gained is 3.58wt%, and molybdenum recovery reaches 98.86%.
Embodiment 4
The present embodiment is applied to 80 tons of electric furnace smelting 0.15wt% containing molybdenum~0.25wt% 20CrNiMoH steel grades.Specifically
Step are as follows:
1) first to molybdenum oxide powder (pure material), inhibitor (mixture of calcium oxide and barium monoxide), reducing agent (anthracite)
It is sieved with binder (mixture of waterglass, bentonite and carboxymethyl cellulose), Control granularity is in 100-200 mesh.
2) molybdenum oxide powder, inhibitor, reducing agent and binder are sufficiently mixed, and utilize disc balling machine or pressure ball mechanism
Ball is obtained, ball diameter is 8mm；Wherein inhibitor quality is the 2.5% of molybdenum oxide powder quality, and reducing agent quality is oxidation
The 6.5% of molybdenum powder quality, binder quality are the 0.6% of molybdenum oxide powder quality.
3) molybdenum oxide powder, inhibitor, reducing agent and binder are sufficiently mixed, using disk pelletizing or pressure pelletizing by ball
Husk as raw material is attached on ball, is formed spherical shell, is then dried to obtain molybdenum oxide composite pellet, wherein spherical shell volume/ball volume
Than for 3:1；Wherein, inhibitor quality is the 7% of molybdenum oxide powder quality, and reducing agent quality is the 12.5% of molybdenum oxide powder quality,
Binder quality is the 0.8% of molybdenum oxide powder quality.
4) molybdenum oxide composite pellet obtained is filled into electric arc furnaces, after adding solid iron and steel stock, is blended into molten iron, into
Row is smelted, and the molybdenum content of the high molybdenum alloy steel of gained is 3.26wt%, and molybdenum recovery reaches 98.42%.
Embodiment 5
The present embodiment is applied to 80 tons of electric furnace smelting 0.15wt% containing molybdenum~0.25wt% 20CrNiMoH steel grades.Specifically
Step are as follows:
1) first (waterglass, swollen to molybdenum oxide powder (pure material), inhibitor (calcium oxide), reducing agent (lignite) and binder
The mixture of profit soil and carboxymethyl cellulose) it is sieved, Control granularity is in 100-200 mesh.
2) molybdenum oxide powder, inhibitor, reducing agent and binder are sufficiently mixed, and utilize disc balling machine or pressure ball mechanism
Ball is obtained, ball diameter is 10mm；Wherein inhibitor quality is the 3.5% of molybdenum oxide powder quality, and reducing agent quality is oxygen
Change the 7.5% of molybdenum powder quality, binder quality is the 1.1% of molybdenum oxide powder quality.
3) molybdenum oxide powder, inhibitor, reducing agent and binder are sufficiently mixed, using disk pelletizing or pressure pelletizing by ball
Husk as raw material is attached on ball, is formed spherical shell, is then dried to obtain molybdenum oxide composite pellet, wherein spherical shell volume/ball volume
Than for 4:1；Wherein, inhibitor quality is the 7% of molybdenum oxide powder quality, and reducing agent quality is the 22.5% of molybdenum oxide powder quality,
Binder quality is the 1.2% of molybdenum oxide powder quality.
4) molybdenum oxide composite pellet obtained is filled into electric arc furnaces, after adding solid iron and steel stock, is blended into molten iron, into
Row is smelted, and the molybdenum content of the high molybdenum alloy steel of gained is 3.28wt%, and molybdenum recovery reaches 98.84%.
Illustrate: percentage composition % used above is the mass percent of selected species and molybdenum oxide powder.
The above embodiments that the present invention describes are exemplary only, are not for limiting the present invention.It is all according to the present invention
Equivalent transformation made by the content of claim and modification should be technology scope of the invention.
The present invention is different from straight at present using the method for the obtained molybdenum oxide composite pellet of segregation ingredient and twice balling-up mode
It connects the mode of inhibitor and molybdenum oxide mixing briquetting, since the volatilization of molybdenum oxide occurs mainly in pelletizing surface layer, by will be compared with
The molybdenum oxide mixture of high-content inhibitor is attached on ball, compared to molybdenum oxide composite compact, preferably inhibits oxygen
Change the volatilization of molybdenum, so that molybdenum oxide volatile quantity reduces, not only solves the volatile problem of molybdenum oxide, and can be improved alloy
The molybdenum yield of steel, in molybdenum oxide composite pellet obtained.The amount of inhibitor is the 4%-14% of molybdenum oxide quality, than before
It is low, save cost.Have the characteristics that smelting energy-output ratio is few, smelting cost is low.The present invention, which is made, inhibits molybdenum oxide high temperature
The pelletizing of volatilization effectively inhibits the volatilization of molybdenum oxide when being applied to alloy steel smelting, and molybdenum recovery is 96.32%~
98.86%.When applied to carrying out smelting iron and steel in electric arc furnaces or converter, operating cost is cheap.
Claims (10)
1. a kind of molybdenum oxide composite pellet, which is characterized in that including ball and the spherical shell being attached on ball, the group of the ball
It include inhibitor, molybdenum oxide powder, reducing agent and binder at ingredient；The constituent of the spherical shell includes inhibitor, molybdenum oxide
Powder, reducing agent and binder；
The content of inhibitor is less than the content of inhibitor in spherical shell in ball.
2. a kind of molybdenum oxide composite pellet according to claim 1, which is characterized in that in ball, inhibitor content is oxygen
Change the 2%-4% of molybdenum powder quality, reduction agent content is the 5%-8% of molybdenum oxide powder quality, and binder content is molybdenum oxide silty
The 0.2%-1.2% of amount.
3. a kind of molybdenum oxide composite pellet according to claim 1, which is characterized in that in spherical shell, inhibitor content is oxygen
Change the 6%-10% of molybdenum powder quality, reduction agent content is the 10%-25% of molybdenum oxide powder quality, and binder content is molybdenum oxide powder
The 0.6%-1.4% of quality.
4. a kind of molybdenum oxide composite pellet according to claim 1 to 3, which is characterized in that inhibitor uses oxygen
Change the mixture of one or both of calcium and barium monoxide, wherein calcium oxide from one of calcium hydroxide and calcium carbonate or
Two kinds of mixture；Mixture of the barium monoxide from one or both of barium hydroxide and barium carbonate.
5. a kind of molybdenum oxide composite pellet according to claim 1 to 3, which is characterized in that reducing agent is using blue
The mixture of one or more of charcoal, coke, bituminous coal, anthracite and lignite.
6. a kind of molybdenum oxide composite pellet according to claim 1 to 3, which is characterized in that binder uses water
The mixture of one or more of glass, bentonite and carboxymethyl cellulose.
7. a kind of molybdenum oxide composite pellet according to claim 1 to 3, which is characterized in that ball diameter is 4-
10mm, spherical shell diameter are 10-18mm, and the volume ratio of ball and spherical shell is (1:2)-(1:4).
8. a kind of molybdenum oxide composite pellet according to claim 1 to 3, which is characterized in that ball and spherical shell
In, inhibitor, molybdenum oxide powder, reducing agent and binder granularity in 100-200 mesh.
9. a kind of method for preparing molybdenum oxide composite pellet described in claim 1-8 any one, which is characterized in that including as follows
Step:
The raw material of ball is sufficiently mixed by S1, obtains ball using disk pelletizing or pressure pelletizing；
The raw material of spherical shell is sufficiently mixed by S2, and spherical shell raw material is attached on ball using disk pelletizing or pressure pelletizing, is formed
Then spherical shell is dried to obtain molybdenum oxide composite pellet.
10. a kind of application of molybdenum oxide composite pellet described in claim 1-8 any one, which is characterized in that the molybdenum oxide
Composite pellet is applied to the smelting that amount containing molybdenum is 0.001wt%~15wt% steel grade.
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| CN103484665A (en) * | 2013-10-14 | 2014-01-01 | 北京科技大学 | Method for manufacturing metallurgic composite pellet by using different binders and two-step pelletizing way |
| CN104250700A (en) * | 2013-06-27 | 2014-12-31 | 宝钢不锈钢有限公司 | Molybdenum oxide ores composite pellets used for argon oxygen refining furnace and preparation method thereof |
| CN106702151A (en) * | 2017-03-11 | 2017-05-24 | 重庆臻焱节能环保科技有限公司 | Compound adhesive for cold-pressed pellets and preparation method of compound adhesive |
| CN106755983A (en) * | 2016-12-21 | 2017-05-31 | 钢铁研究总院 | A kind of manganese oxide and molybdenum oxide mixture pelletizing and its application method |
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2019
- 2019-08-28 CN CN201910803607.6A patent/CN110408836B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101613800A (en) * | 2009-07-17 | 2009-12-30 | 重庆瑞帆再生资源开发有限公司 | Adopt metallurgical composite pellet, preparation method and application that twice the balling-up mode is made |
| CN104250700A (en) * | 2013-06-27 | 2014-12-31 | 宝钢不锈钢有限公司 | Molybdenum oxide ores composite pellets used for argon oxygen refining furnace and preparation method thereof |
| CN103484665A (en) * | 2013-10-14 | 2014-01-01 | 北京科技大学 | Method for manufacturing metallurgic composite pellet by using different binders and two-step pelletizing way |
| CN106755983A (en) * | 2016-12-21 | 2017-05-31 | 钢铁研究总院 | A kind of manganese oxide and molybdenum oxide mixture pelletizing and its application method |
| CN106702151A (en) * | 2017-03-11 | 2017-05-24 | 重庆臻焱节能环保科技有限公司 | Compound adhesive for cold-pressed pellets and preparation method of compound adhesive |
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