CN105907953A - Molybdenum ore alloying metallurgy method - Google Patents
Molybdenum ore alloying metallurgy method Download PDFInfo
- Publication number
- CN105907953A CN105907953A CN201610387122.XA CN201610387122A CN105907953A CN 105907953 A CN105907953 A CN 105907953A CN 201610387122 A CN201610387122 A CN 201610387122A CN 105907953 A CN105907953 A CN 105907953A
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- CN
- China
- Prior art keywords
- molybdenum ore
- ball
- molybdenum
- alloying
- ore
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
Abstract
The invention relates to a molybdenum ore alloying metallurgy method. The method includes the following steps that molybdenum ore is pelletized or briquetted so that molybdenum ore balls can be formed; the surfaces of the molybdenum ore balls are coated with lime powder, and the thickness of the lime powder ranges from 1 mm to 3 mm; and after the steelmaking temperature is adjusted to the preset temperature, the molybdenum ore balls coated with the lime powder is added into molten steel, and the molybdenum ore can be alloyed. By means of the molybdenum ore alloying metallurgy method, the molybdenum ore does not need to be subjected to high-temperature roasting, energy conservation and emission reduction are achieved, the yield is increased, and economic benefits in the smelting process are obviously increased.
Description
Technical field
The present invention relates to field of steel-making, be specifically related to the metallurgical method of a kind of molybdenum ore alloying.
Background technology
Molybdenum is a kind of important alloy element, and molybdenum is to improve the conjunction that the intensity of steel, toughness and corrosion stability are best
One of gold addition element.Molybdenum content in low-alloy steel is not more than 1%, but the consumption of this respect to account for molybdenum total
About the 50% of consumption figure.Rustless steel adds molybdenum, the corrosion resistance of steel can be improved.Molybdenum is added in cast iron,
Intensity and the anti-wear performance of ferrum can be improved.Nickel based super alloy containing molybdenum 18% has that fusing point is high, density is low and hot
The characteristics such as the coefficient of expansion is little, for manufacturing the various high-temperature components of aerospace.
At present, in steel alloy smelting process, alloying element is mainly by adding ferroalloy or the shape of metal simple-substance
Formula adds molten steel.The ferro-molybdenum or the molybdenum-iron that carry out molybdenum alloy in steelmaking process are by oxidizing molybdenum ore
Thing is smelted.Ferroalloy smelting process has the advantages that energy consumption is high, environmental pollution is serious.Therefore,
Exploitation does not use ferroalloy or significant with the steel alloy smelting process of ferroalloy less.
As a kind of important low cost steel-smelting technology, oxide replaces ferroalloy saving the same of production cost
Time, it being avoided that ferroalloy produces the energy resource consumption and environmental pressure brought, these advantages make Oxide Metallurgy
Technology is developed rapidly.Molybdenum oxide in molybdenum ore is mainly with MoO2Or MoO3Presented in,
MoO3Start acutely to volatilize at 780 DEG C, and MoO2MoO can be oxidized at about 440 DEG C3, it
After start acutely volatilization at 780 DEG C, thus reduce the recovery rate of molybdenum in molybdenum ore alloying process.Therefore, as
What improves the recovery rate of molybdenum ore alloying process is those skilled in the art's problem demanding prompt solutions.
Summary of the invention
In correlation technique, molybdenum ore is due to high volatility, and general molybdenum ore alloying needs mix with Calx, pelletizing,
Roasting the most at a certain temperature, the calcium molybdate relatively low to form volatility, to improve the recovery rate of molybdenum in molybdenum ore.
Applicant of the present invention surprisingly learns, after molybdenum ore pelletizing, then is coated with one layer of CaO on molybdenum ore ball,
Direct plungeing into and carry out alloying in molten steel, be equally effectively improved molybdenum ore DIRECT ALLOYING receives to obtain efficiency,
Need not roasting, energy-saving and emission-reduction, improve recovery rate, hence it is evident that increase smelting process economic benefit.
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.
To this end, it is an object of the present invention to propose the metallurgy of the high molybdenum ore alloying of a kind of molybdenum ore recovery rate
Method.
The metallurgical method of a kind of molybdenum ore alloying according to embodiments of the present invention, comprises the steps: step 1,
By molybdenum ore pelletizing or pressure ball, to form molybdenum ore ball；Step 2, wraps up pulverized limestone, stone on the surface of molybdenum ore ball
The thickness of ashes is 1mm～3mm；Step 3, after regulation steel-making temperature to preset temperature, adds in molten steel
Enter to wrap up the molybdenum ore ball of pulverized limestone, with by molybdenum ore alloying.
The metallurgical method of a kind of molybdenum ore alloying according to embodiments of the present invention, after molybdenum ore pelletizing, then at molybdenum
It is coated with one layer of CaO on the ball of ore deposit, direct plunges into and molten steel carries out alloying, be equally effectively improved molybdenum ore straight
Engage aurification receives to obtain efficiency, it is not necessary to roasting, energy-saving and emission-reduction, improves recovery rate, hence it is evident that increases and smelts
Process economy benefit.
It addition, the metallurgical method of a kind of molybdenum ore alloying according to the above embodiment of the present invention, it is also possible to have
Following additional technical characteristic:
Further, before the parcel pulverized limestone of the surface of molybdenum ore ball, by molybdenum ore ball surface water-soaked.
Further, the particle diameter of molybdenum ore ball is 15mm～50mm.
Further, the particle diameter of molybdenum ore ball is 20mm.
Further, preset temperature is 1400 DEG C～1700 DEG C.
Further, in step 3, the quality of the molybdenum ore ball every time adding parcel pulverized limestone is quality of molten steel
Less than 2%.
Further, in step 1, drum type brake pelletizer, disk granulator, vibration type pelletizing are used
Machine or stirring-type pelletizer are to molybdenum ore pelletizing, and pelletizing liquid is water.
Further, in step 1, use high pressure powder ball press to molybdenum ore pressure ball.
The additional aspect of the present invention and advantage will part be given in the following description, and part will be retouched from following
Become obvious in stating, or recognized by the practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the metallurgical method flow chart of a kind of molybdenum ore alloying of the embodiment of the present invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the embodiment described below with reference to accompanying drawing is exemplary
, it is intended to it is used for explaining the present invention, and is not considered as limiting the invention.
As it is shown in figure 1, the metallurgical method of a kind of molybdenum ore alloying according to embodiments of the present invention, including as follows
Step:
S101: by molybdenum ore pelletizing or pressure ball, to form molybdenum ore ball.Specifically, the particle diameter of molybdenum ore ball is about
15mm～50mm.Preferably, the particle diameter of molybdenum ore ball is 20mm.If molybdenum ore ball is excessive, to molten steel
The when of middle addition molybdenum ore ball, steel-making temperature can be affected；If molybdenum ore ball is too small, control the operation of addition
Can be comparatively laborious.Drum type brake pelletizer, disk granulator, vibration type pelletizer or stirring-type can be used
Molybdenum ore pelletizing, pelletizing liquid can be elected as water by pelletizer；High pressure powder ball press can also be used molybdenum ore
Pressure ball, this is that those skilled in the art is to understand.
S102: wrap up pulverized limestone on the surface of molybdenum ore ball, the thickness of pulverized limestone is 1mm～3mm.Preferably,
By molybdenum ore ball surface water-soaked, molybdenum ore ball can be made before the parcel pulverized limestone of the surface of molybdenum ore ball
Surface be easier to parcel pulverized limestone.
S103: after regulation steel-making temperature to preset temperature, add the molybdenum ore ball of parcel pulverized limestone in molten steel,
With by molybdenum ore alloying.Specifically, preset temperature is about 1400 DEG C～1700 DEG C, and each addition controls
Less than the 2% of molten steel amount, to avoid temperature drop the biggest.
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment
(1) employing drum type brake pelletizer is by molybdenum ore pelletizing, to form the molybdenum ore ball that particle diameter is about 20mm.
(2) molybdenum ore ectosphere parcel 1mm～3mm after the water that molybdenum ore ball surface sprinkling is a small amount of, after water spray
Pulverized limestone.
(3) regulation steel-making temperature is to after preset temperature, adds the molybdenum ore ball of parcel pulverized limestone in molten steel, with
By molybdenum ore alloying, each addition controls within the 2% of molten steel amount.
Table 1 is the yield of molybdenum ore alloying at a temperature of difference is made steel.
Table 1: pig iron oxidizing molybdenum ore DIRECT ALLOYING yield under different temperatures
As it can be seen from table 1 at a temperature of 1400 DEG C～1700 DEG C, in molybdenum ore, the recovery rate of molybdenum is all 82%
Above, recovery rate is higher.And, along with the reduction of steel-making temperature, in molybdenum ore, the recovery rate of molybdenum slightly rises.
Comparative example
Comparative example, for being at 1600 DEG C in steel-making temperature, adds the molybdenum ore ball of multi-form in molten steel, with
After molybdenum ore alloying, the recovery rate of oxidizing molybdenum ore, as shown in table 2.
At 2:1600 DEG C of table, different feed way are to MoO3Recovery rate
It is found that add the molybdenum ore ball mix also roasting with CaO after or outer layer covering CaO from table 2
Molybdenum ore ball time, the recovery rate of oxidizing molybdenum ore is than adding powdery molybdenum ore or not covering the molybdenum ore ball of CaO and compare and want
Much higher, such that it is able to reach a conclusion, cover CaO on molybdenum ore ball surface and can improve the direct alloy of molybdenum ore
That changes receives to obtain efficiency.And add the molybdenum ore ball mix also roasting with CaO after and cover CaO's with adding outer layer
Molybdenum ore ball is compared, and oxidizing molybdenum ore recovery rate is the same, say, that though the most fired, molybdenum oxide
Recovery rate is the highest, after the bigger high-temperature roasting technique that consumes energy is removed, the recovery rate of molybdenum oxide is not had shadow
Ring.
Therefore, molybdenum ore can be effectively improved according to the metallurgical method of a kind of molybdenum ore alloying of the present invention directly to close
Aurification receive to obtain efficiency, without the power consumption technical process such as high-temperature roasting, be substantially reduced process costs, fall
Low emission, energy-saving and emission-reduction, hence it is evident that increase smelting process economic benefit.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ",
" width ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ",
The orientation of the instruction such as " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferential "
Or position relationship is based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and Jian
Change and describe rather than indicate or imply that the device of indication or element must have specific orientation, with specifically
Azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint phase
To importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", "
Two " feature can express or implicitly include one or more this feature.In description of the invention
In, " multiple " are meant that two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ",
The term such as " fix " should be interpreted broadly, connect for example, it may be fixing, it is also possible to be to removably connect,
Or it is integral；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to pass through
Intermediary is indirectly connected to, and can be connection or the interaction relationship of two elements of two element internals.
For the ordinary skill in the art, above-mentioned term can be understood as the case may be in the present invention
Concrete meaning.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or
D score can be that the first and second features directly contact, or the first and second features are connect indirectly by intermediary
Touch.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature second
Directly over feature or oblique upper, or it is merely representative of fisrt feature level height higher than second feature.Fisrt feature
Second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or tiltedly under
Side, or it is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ",
The description of " concrete example " or " some examples " etc. means to combine the concrete spy of this embodiment or example description
Levy, structure, material or feature are contained at least one embodiment or the example of the present invention.In this explanation
In book, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example.And,
Describe specific features, structure, material or feature can with in one or more embodiments in office or example with
Suitably mode combines.Additionally, in the case of the most conflicting, those skilled in the art can be by this
The feature of different embodiments described in description or example and different embodiment or example be combined and
Combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment
It is exemplary, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art is the present invention's
In the range of above-described embodiment can be changed, revise, replace and modification.
Claims (8)
1. the metallurgical method of a molybdenum ore alloying, it is characterised in that comprise the steps:
Step 1, by molybdenum ore pelletizing or pressure ball, to form molybdenum ore ball；
Step 2, wraps up pulverized limestone on the surface of molybdenum ore ball, and the thickness of pulverized limestone is 1mm～3mm；
Step 3, after regulation steel-making temperature to preset temperature, adds the molybdenum ore ball of parcel pulverized limestone in molten steel,
With by molybdenum ore alloying.
The metallurgical method of a kind of molybdenum ore alloying the most according to claim 1, it is characterised in that at molybdenum
Before the surface parcel pulverized limestone of ore deposit ball, by molybdenum ore ball surface water-soaked.
The metallurgical method of a kind of molybdenum ore alloying the most according to claim 1 and 2, it is characterised in that
The particle diameter of molybdenum ore ball is 15mm～50mm.
The metallurgical method of a kind of molybdenum ore alloying the most according to claim 3, it is characterised in that molybdenum ore
The particle diameter of ball is 20mm.
The metallurgical method of a kind of molybdenum ore alloying the most according to claim 1 and 2, it is characterised in that
Described preset temperature is 1400 DEG C～1700 DEG C.
The metallurgical method of a kind of molybdenum ore alloying the most according to claim 1 and 2, it is characterised in that
In step 3, add quality is quality of molten steel less than the 2% of the molybdenum ore ball wrapping up pulverized limestone every time.
The metallurgical method of a kind of molybdenum ore alloying the most according to claim 1 and 2, it is characterised in that
In step 1, drum type brake pelletizer, disk granulator, vibration type pelletizer or stirring-type pelletizing are used
Machine is to molybdenum ore pelletizing, and pelletizing liquid is water.
The metallurgical method of a kind of molybdenum ore alloying the most according to claim 1 and 2, it is characterised in that
In step 1, use high pressure powder ball press to molybdenum ore pressure ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610387122.XA CN105907953A (en) | 2016-06-01 | 2016-06-01 | Molybdenum ore alloying metallurgy method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610387122.XA CN105907953A (en) | 2016-06-01 | 2016-06-01 | Molybdenum ore alloying metallurgy method |
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| CN201610387122.XA Pending CN105907953A (en) | 2016-06-01 | 2016-06-01 | Molybdenum ore alloying metallurgy method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108330382A (en) * | 2018-01-31 | 2018-07-27 | 河钢股份有限公司承德分公司 | A kind of method of anti-stick in VN alloy production process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5629652A (en) * | 1979-08-13 | 1981-03-25 | Nisshin Steel Co Ltd | Molybdenum oxide briquette |
| CN103343276A (en) * | 2013-06-03 | 2013-10-09 | 江苏大学 | Chromium molybdenum iron alloy and preparation method thereof |
| CN103469093A (en) * | 2013-08-15 | 2013-12-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Molybdenum-containing stainless steel and smelting method thereof |
-
2016
- 2016-06-01 CN CN201610387122.XA patent/CN105907953A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5629652A (en) * | 1979-08-13 | 1981-03-25 | Nisshin Steel Co Ltd | Molybdenum oxide briquette |
| CN103343276A (en) * | 2013-06-03 | 2013-10-09 | 江苏大学 | Chromium molybdenum iron alloy and preparation method thereof |
| CN103469093A (en) * | 2013-08-15 | 2013-12-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Molybdenum-containing stainless steel and smelting method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王艳华 等: "宝钢用钼精矿在AOD直接合金化过程中挥发性研究", 《内蒙古科技大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108330382A (en) * | 2018-01-31 | 2018-07-27 | 河钢股份有限公司承德分公司 | A kind of method of anti-stick in VN alloy production process |
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Application publication date: 20160831 |
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