CN115491519A - Preparation process of green nickel-iron alloy - Google Patents
Preparation process of green nickel-iron alloy Download PDFInfo
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- CN115491519A CN115491519A CN202210943881.5A CN202210943881A CN115491519A CN 115491519 A CN115491519 A CN 115491519A CN 202210943881 A CN202210943881 A CN 202210943881A CN 115491519 A CN115491519 A CN 115491519A
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- 229910001030 Iron–nickel alloy Inorganic materials 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 60
- 239000000956 alloy Substances 0.000 claims abstract description 60
- 239000000843 powder Substances 0.000 claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 238000005245 sintering Methods 0.000 claims abstract description 21
- 238000002844 melting Methods 0.000 claims abstract description 16
- 230000008018 melting Effects 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 230000009467 reduction Effects 0.000 claims abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 48
- 229910000863 Ferronickel Inorganic materials 0.000 claims description 30
- 229910052759 nickel Inorganic materials 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 239000000571 coke Substances 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 7
- 229910052797 bismuth Inorganic materials 0.000 claims description 7
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 229910017052 cobalt Inorganic materials 0.000 claims description 7
- 239000010941 cobalt Substances 0.000 claims description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 7
- 229910052733 gallium Inorganic materials 0.000 claims description 7
- 229910052702 rhenium Inorganic materials 0.000 claims description 7
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 claims description 7
- 229910052712 strontium Inorganic materials 0.000 claims description 7
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 11
- 238000003723 Smelting Methods 0.000 abstract description 7
- 239000011812 mixed powder Substances 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 description 13
- 239000002245 particle Substances 0.000 description 4
- 229910000990 Ni alloy Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000007545 Vickers hardness test Methods 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- 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
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
- C22B23/023—Obtaining nickel or cobalt by dry processes with formation of ferro-nickel or ferro-cobalt
-
- 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
- C22B1/16—Sintering; Agglomerating
- C22B1/216—Sintering; Agglomerating in rotary furnaces
-
- 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
- C22B23/00—Obtaining nickel or cobalt
- C22B23/005—Preliminary treatment of ores, e.g. by roasting or by the Krupp-Renn process
-
- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a preparation process of a green nickel-iron alloy, which comprises the following steps: s1: drying the raw ore to ensure that the moisture content of the raw ore is 5-10%; s2: placing the raw ore in a high-speed mixer for high-speed mixing to obtain mixed alloy powder; s3: adding 3-5 parts by mass of a reducing agent into raw ore, and continuously mixing; s4: placing the uniformly mixed powder in the step S3 in a rotary kiln for sintering, and taking the sintered powder out of the kiln to obtain a high-temperature pre-reduction sinter; s5: and (3) putting the sinter in the S4 into a vacuum melting furnace, and melting for 2-4 hours at the temperature of 600-1200 ℃ to obtain alloy liquid. The nickel-iron alloy prepared by the process has extremely high density, strength and toughness, the preparation method is simple, the production efficiency is high, the nickel-iron alloy can be controlled not to be easily deformed during smelting by adopting a method of sintering firstly and then smelting, the performance of the alloy can be improved, the production cost can be reduced, and energy conservation and emission reduction can be realized.
Description
Technical Field
The invention relates to the technical field of new composite materials, in particular to a preparation process of a green nickel-iron alloy.
Background
Nickel is an important strategic metal and is an excellent corrosion-resistant material, and nickel is not only a basic material for manufacturing nickel alloy, but also an alloy element in other alloys (such as iron, copper, aluminum and the like). Nickel is mainly used in the metallurgical industry and is an important alloy element for producing stainless steel, special steel, high-temperature alloy, precision alloy, heat-resistant alloy and the like. Nickel is also widely used in the fields of electroplating, magnetic materials, electronics, electric appliances, electromagnetic and sensor, oxygen storage alloy, shape memory alloy, national defense, aviation, aerospace, rocket technology and the like, for example, super nickel or nickel alloy is used as a high-temperature structural material, and nickel alloy are used in parts with special purposes, instrument manufacturing, machine manufacturing, rocket technical equipment, atomic reactor; nickel is also of particular value in the chemical industry for the production of alkaline storage batteries, porous filters, catalysts, pigments, dyes, etc.; large plants often use nickel clad steel, the nickel clad layer being hot rolled or welded; nickel is used for manufacturing production parts of corrosive chemical products. At present, the consumption of nickel is second to that of copper, aluminum, lead and zinc but is the fifth place of nonferrous metals all over the world, and the nickel is regarded as an important strategic substance for national economic construction, and the effective development and comprehensive utilization of the resources are always paid attention to by various countries. Currently, 70% of the world's nickel is extracted from sulphide ores, while about 72% of the global nickel resource is present in oxidic ores. Along with the exploitation of nickel sulfide ore, the global resource of nickel sulfide ore is gradually reduced, and the economic and efficient utilization of nickel oxide ore (laterite-nickel ore) is more and more paid attention by people.
The prior direct production process of ferronickel mainly comprises the following steps: (1) smelting in an electric furnace to produce ferronickel: the energy consumption is high, and the production cost is overhigh; (2) blast furnace smelting to produce ferronickel: the method has poor adaptability to raw ores, has strict requirements on magnesium content, cannot treat fine ores, and has strict requirements on furnace charging materials; (3) The blast furnace smelting ferronickel has the characteristics of large capacity, large investment, high production cost and serious damage to the blast furnace; and (4) producing ferronickel by a reduction roasting-mineral separation process: although the process has been successfully used for industrial production, the process technology is immature. The reduction roasting-mineral separation process for producing ferronickel is the most common ferronickel alloy production process at present, but the major problem of the ferronickel in the production process is that the burning loss of the ferronickel is large in the production process. Therefore, the invention provides a preparation process of a green ferronickel alloy by combining the prior art.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a preparation process of a green ferronickel alloy.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a preparation process of a green ferronickel alloy comprises the following steps:
s1: drying the raw ore to ensure that the moisture content of the raw ore is 5-10%;
s2: placing the raw ore in a high-speed mixer for high-speed mixing to obtain mixed alloy powder;
s3: adding 3-5 parts by mass of reducing agent into the raw ore, and continuously mixing;
s4: placing the uniformly mixed powder in the step S3 in a rotary kiln for sintering, and taking the sintered powder out of the kiln to obtain a high-temperature pre-reduction sinter;
s5: putting the sinter in the step S4 into a vacuum melting furnace, and melting for 2-4 hours at the temperature of 600-1200 ℃ to obtain alloy liquid;
s6: pouring the alloy liquid into a forming die, carrying out shape setting in the die, and simultaneously carrying out cooling treatment after cooling and forming.
Preferably, the mixed alloy powder comprises the following components: 15-25 parts of nickel, 6-50 parts of iron, 2-8 parts of gallium, 1-3 parts of strontium, 1-3 parts of bismuth, 1-5 parts of cobalt, 1-3 parts of rhenium and 1-2 parts of carbon.
Preferably, the raw ore in the S1 is laterite-nickel ore.
Preferably, the reducing agent in S2 is coke.
Preferably, in the S2 and the S3, the rotating speed of the high-speed mixer is 60-90r/min.
Preferably, in S6, the mold is cooled and set at normal temperature, and then the mold is placed in water to reduce the temperature.
Preferably, the sintering temperature in S4 is 1000-1300 ℃, and the rotating speed of the rotary kiln is 2-4r/min.
Preferably, the surface brightness of the nickel-iron alloy obtained in the step S6 is first-grade brightness.
(III) advantageous effects
Compared with the prior art, the invention provides a preparation process of a green ferronickel alloy, which comprises the following steps
Has the beneficial effects that:
1. according to the preparation process of the green nickel-iron alloy, the nickel-iron alloy prepared by the process has extremely high density, strength and toughness, the preparation method is simple, the production efficiency is high, the nickel-iron alloy can be controlled not to be deformed easily during smelting by adopting a method of sintering firstly and smelting secondly, the performance of the alloy can be improved, the production cost can be reduced, and energy conservation and emission reduction can be realized.
2. The preparation process of the green nickel-iron alloy has the advantages that the nickel-iron alloy prepared by the process has strong adaptability, common ores can be prepared, the content of magnesium is reduced, and the adaptability to raw ores is improved.
3. According to the preparation process of the green ferronickel alloy, the ferronickel alloy prepared by the process can reduce the damage to a furnace body, reduce the input cost and improve the production efficiency;
4. according to the preparation process of the green ferronickel alloy, the burning loss amount of the ferronickel alloy prepared by the process can be reduced and the production efficiency can be improved in the process of producing ferronickel by a reduction roasting-mineral separation process.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The following examples, which are given by way of illustration, are intended to illustrate the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used for convenience in describing and simplifying the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
A preparation process of a green ferronickel alloy comprises the following steps:
s1: drying raw ores of the laterite-nickel ore to ensure that the moisture content of the raw ores is 5-10%;
s2: placing the raw ore in a high-speed mixer for high-speed mixing to obtain mixed alloy powder, wherein the mixed alloy powder comprises the following components: 15 parts of nickel, 6 parts of iron, 2 parts of gallium, 1 part of strontium, 1 part of bismuth, 1 part of cobalt, 1 part of rhenium and 1 part of carbon;
s3: adding 3 parts by mass of coke reducing agent into the raw ore, and continuously mixing at the rotating speed of 60-90r/min by using a high-speed mixer;
s4: placing the powder uniformly mixed in the step S3 in a rotary kiln for sintering, and taking the sintered powder out of the kiln to obtain a high-temperature pre-reduction sinter, wherein the sintering temperature is 1000-1300 ℃, and the rotating speed of the rotary kiln is 2-4r/min;
s5: putting the sinter in the S4 into a vacuum melting furnace, and melting for 2-4 hours at the temperature of 600-1200 ℃ to obtain alloy liquid;
s6: pouring the alloy liquid into a forming die, carrying out shaping in the die, simultaneously carrying out cooling treatment after cooling and forming, carrying out cooling shaping at normal temperature, and then placing in water for cooling to obtain the nickel-iron alloy with first-grade bright surface brightness.
Example 2
A preparation process of a green nickel-iron alloy comprises the following steps:
s1: drying raw ores of the laterite-nickel ore to ensure that the moisture content of the raw ores is 5-10%;
s2: placing the raw ore in a high-speed mixer for high-speed mixing to obtain mixed alloy powder, wherein the mixed alloy powder comprises the following components: 17 parts of nickel, 15 parts of iron, 3 parts of gallium, 1.5 parts of strontium, 1.5 parts of bismuth, 1.5 parts of cobalt, 1.5 parts of rhenium and 1.2 parts of carbon;
s3: adding 3.5 parts by mass of coke reducing agent into the raw ore, and continuously mixing at the rotating speed of 60-90r/min by using a high-speed mixer;
s4: placing the uniformly mixed powder in the step S3 in a rotary kiln for sintering, and taking the sintered powder out of the kiln to obtain a high-temperature pre-reduction sinter, wherein the sintering temperature is 1000-1300 ℃, and the rotating speed of the rotary kiln is 2-4r/min;
s5: putting the sinter in the step S4 into a vacuum melting furnace, and melting for 2-4 hours at the temperature of 600-1200 ℃ to obtain alloy liquid;
s6: pouring the alloy liquid into a forming die, carrying out shaping in the die, simultaneously carrying out cooling treatment after cooling and shaping, carrying out cooling shaping at normal temperature, and then placing in water for cooling to obtain the nickel-iron alloy with first-grade bright surface brightness.
Example 3
A preparation process of a green ferronickel alloy comprises the following steps:
s1: drying raw ores of the laterite-nickel ore to ensure that the moisture content of the raw ores is 5-10%;
s2: placing the raw ore in a high-speed mixer for high-speed mixing to obtain mixed alloy powder, wherein the mixed alloy powder comprises the following components: 20 parts of nickel, 20 parts of iron, 4 parts of gallium, 12 parts of strontium, 2 parts of bismuth, 2 parts of cobalt, 2 parts of rhenium and 1.5 parts of carbon;
s3: adding 4 parts by mass of coke reducing agent into the raw ore, and continuously mixing at the rotating speed of 60-90r/min by using a high-speed mixer;
s4: placing the uniformly mixed powder in the step S3 in a rotary kiln for sintering, and taking the sintered powder out of the kiln to obtain a high-temperature pre-reduction sinter, wherein the sintering temperature is 1000-1300 ℃, and the rotating speed of the rotary kiln is 2-4r/min;
s5: putting the sinter in the S4 into a vacuum melting furnace, and melting for 2-4 hours at the temperature of 600-1200 ℃ to obtain alloy liquid;
s6: pouring the alloy liquid into a forming die, carrying out shaping in the die, simultaneously carrying out cooling treatment after cooling and forming, carrying out cooling shaping at normal temperature, and then placing in water for cooling to obtain the nickel-iron alloy with first-grade bright surface brightness.
Example 4
A preparation process of a green ferronickel alloy comprises the following steps:
s1: drying raw ores of the laterite-nickel ore to enable the moisture content of the raw ores to be 5-10%;
s2: placing the raw ore in a high-speed mixer for high-speed mixing to obtain mixed alloy powder, wherein the mixed alloy powder comprises the following components: 22 parts of nickel, 35 parts of iron, 6 parts of gallium, 2.5 parts of strontium, 2.5 parts of bismuth, 4 parts of cobalt, 2.5 parts of rhenium and 1.7 parts of carbon;
s3: adding 4.5 parts by mass of coke reducing agent into the raw ore, and continuously mixing at the rotating speed of 60-90r/min by a high-speed mixer;
s4: placing the powder uniformly mixed in the step S3 in a rotary kiln for sintering, and taking the sintered powder out of the kiln to obtain a high-temperature pre-reduction sinter, wherein the sintering temperature is 1000-1300 ℃, and the rotating speed of the rotary kiln is 2-4r/min;
s5: putting the sinter in the S4 into a vacuum melting furnace, and melting for 2-4 hours at the temperature of 600-1200 ℃ to obtain alloy liquid;
s6: pouring the alloy liquid into a forming die, carrying out shaping in the die, simultaneously carrying out cooling treatment after cooling and shaping, carrying out cooling shaping at normal temperature, and then placing in water for cooling to obtain the nickel-iron alloy with first-grade bright surface brightness.
Example 5
A preparation process of a green ferronickel alloy comprises the following steps:
s1: drying raw ores of the laterite-nickel ore to enable the moisture content of the raw ores to be 5-10%;
s2: placing the raw ore in a high-speed mixer for high-speed mixing to obtain mixed alloy powder, wherein the mixed alloy powder comprises the following components: 25 parts of nickel, 50 parts of iron, 8 parts of gallium, 3 parts of strontium, 3 parts of bismuth, 5 parts of cobalt, 3 parts of rhenium and 2 parts of carbon;
s3: adding 5 parts by mass of coke reducing agent into the raw ore, and continuously mixing at the rotating speed of 60-90r/min by using a high-speed mixer;
s4: placing the uniformly mixed powder in the step S3 in a rotary kiln for sintering, and taking the sintered powder out of the kiln to obtain a high-temperature pre-reduction sinter, wherein the sintering temperature is 1000-1300 ℃, and the rotating speed of the rotary kiln is 2-4r/min;
s5: putting the sinter in the S4 into a vacuum melting furnace, and melting for 2-4 hours at the temperature of 600-1200 ℃ to obtain alloy liquid;
s6: pouring the alloy liquid into a forming die, carrying out shaping in the die, simultaneously carrying out cooling treatment after cooling and shaping, carrying out cooling shaping at normal temperature, and then placing in water for cooling to obtain the nickel-iron alloy with first-grade bright surface brightness.
Comparative example 1
The obtained nickel-iron alloy is prepared by a traditional method.
And (3) testing and analyzing:
the nickel-iron alloys prepared in examples 1 to 5 and comparative example 1 were formed into a nickel-iron alloy product, and the resultant was subjected to vickers hardness test, the results of which are shown in table 1.
| Group of | Hardness number | Brightness of light |
| Example 1 | 630 | First level |
| Example 2 | 660 | First stage |
| Example 3 | 670 | First level |
| Example 4 | 635 | First stage |
| Example 5 | 625 | First level |
| Comparative example 1 | 450 | Second order |
As can be seen from table 1, the present invention, by adjusting the particle size of the coke particles used for reducing the raw ore, the sintering temperature of the raw ore in the rotary kiln, and the discharge temperature of the high-temperature pre-reduced sinter obtained after sintering, is beneficial to the reaction of the coke particles with oxygen to generate reducing gas CO, so as to completely reduce NiO and other oxides in the ore, and ensure to obtain a ferronickel alloy with higher strength; secondly, coke particles are prevented from being bonded on the inner wall of the rotary kiln, so that the sintering space of the rotary kiln for raw ore is reduced, and the yield of the nickel-iron alloy is improved; and finally, the sintering time is shortened by improving the kiln discharging temperature of the sintered high-temperature pre-reduced sinter, the fusing time is shortened, and the yield of the nickel-iron alloy is further improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (8)
1. A preparation process of a green nickel-iron alloy is characterized by comprising the following steps:
s1: drying the raw ore to ensure that the moisture content of the raw ore is 5-10%;
s2: placing the raw ore in a high-speed mixer for high-speed mixing to obtain mixed alloy powder;
s3: adding 3-5 parts by mass of a reducing agent into raw ore, and continuously mixing;
s4: placing the powder uniformly mixed in the step S3 in a rotary kiln for sintering, and taking the sintered powder out of the rotary kiln to obtain a high-temperature pre-reduction sinter;
s5: putting the sinter in the step S4 into a vacuum melting furnace, and melting for 2-4 hours at the temperature of 600-1200 ℃ to obtain alloy liquid;
s6: pouring the alloy liquid into a forming die, carrying out shape setting in the die, and simultaneously carrying out cooling treatment after cooling and forming.
2. The process for preparing a green ferronickel alloy according to claim 1, wherein: the mixed alloy powder comprises the following components: 15-25 parts of nickel, 6-50 parts of iron, 2-8 parts of gallium, 1-3 parts of strontium, 1-3 parts of bismuth, 1-5 parts of cobalt, 1-3 parts of rhenium and 1-2 parts of carbon.
3. A green ferronickel alloy preparation process according to claim 1, wherein: and the raw ore in the S1 is laterite-nickel ore.
4. The process for preparing a green ferronickel alloy according to claim 1, wherein: the reducing agent in S2 is coke.
5. A green ferronickel alloy preparation process according to claim 1, wherein: in the S2 and the S3, the rotating speed of the high-speed mixer is 60-90r/min.
6. The process for preparing a green ferronickel alloy according to claim 1, wherein: and in the S6, the material is cooled and shaped at the normal temperature, and then is placed in water for cooling.
7. A green ferronickel alloy preparation process according to claim 1, wherein: and in the step S4, the sintering temperature is 1000-1300 ℃, and the rotating speed of the rotary kiln is 2-4r/min.
8. The process for preparing a green ferronickel alloy according to claim 1, wherein: and the surface brightness of the nickel-iron alloy obtained in the step S6 is first-grade brightness.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975190A (en) * | 2014-04-09 | 2015-10-14 | 哈尔滨市永恒鑫科技开发有限公司 | Energy-saving smelting technology of laterite-nickel ores |
| CN212384422U (en) * | 2020-06-11 | 2021-01-22 | 上高县宏大镍业有限公司 | Nickel-iron alloy forming die |
| CN112626301A (en) * | 2020-11-30 | 2021-04-09 | 商都中建金马冶金化工有限公司 | Preparation process of nickel-iron alloy |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975190A (en) * | 2014-04-09 | 2015-10-14 | 哈尔滨市永恒鑫科技开发有限公司 | Energy-saving smelting technology of laterite-nickel ores |
| CN212384422U (en) * | 2020-06-11 | 2021-01-22 | 上高县宏大镍业有限公司 | Nickel-iron alloy forming die |
| CN112626301A (en) * | 2020-11-30 | 2021-04-09 | 商都中建金马冶金化工有限公司 | Preparation process of nickel-iron alloy |
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