CN104087753A - Method for producing high-nickel-grade nickel-iron powder by laterite-nickel ore autocatalytic reduction - Google Patents
Method for producing high-nickel-grade nickel-iron powder by laterite-nickel ore autocatalytic reduction Download PDFInfo
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- CN104087753A CN104087753A CN201410360982.5A CN201410360982A CN104087753A CN 104087753 A CN104087753 A CN 104087753A CN 201410360982 A CN201410360982 A CN 201410360982A CN 104087753 A CN104087753 A CN 104087753A
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- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 144
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 73
- 239000000843 powder Substances 0.000 title claims abstract description 25
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 230000009467 reduction Effects 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title abstract description 3
- 238000000034 method Methods 0.000 claims abstract description 40
- 238000005453 pelletization Methods 0.000 claims abstract description 28
- 238000011084 recovery Methods 0.000 claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 18
- 239000012141 concentrate Substances 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 16
- 238000007885 magnetic separation Methods 0.000 claims abstract description 16
- 239000002516 radical scavenger Substances 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 239000003245 coal Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 239000002689 soil Substances 0.000 claims description 31
- 229910000863 Ferronickel Inorganic materials 0.000 claims description 23
- 230000002829 reductive effect Effects 0.000 claims description 19
- 239000000654 additive Substances 0.000 claims description 15
- 230000000996 additive effect Effects 0.000 claims description 13
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 9
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 9
- 235000011152 sodium sulphate Nutrition 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- 238000005844 autocatalytic reaction Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000013467 fragmentation Methods 0.000 claims description 2
- 238000006062 fragmentation reaction Methods 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 17
- 229910052751 metal Inorganic materials 0.000 abstract description 13
- 239000002184 metal Substances 0.000 abstract description 13
- 238000002309 gasification Methods 0.000 abstract description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 5
- 239000011707 mineral Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 3
- 239000008188 pellet Substances 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 239000011362 coarse particle Substances 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 239000010419 fine particle Substances 0.000 abstract 1
- 239000002923 metal particle Substances 0.000 abstract 1
- 239000002667 nucleating agent Substances 0.000 abstract 1
- 230000002000 scavenging effect Effects 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000009628 steelmaking Methods 0.000 description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000480 nickel oxide Inorganic materials 0.000 description 2
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- MKPXGEVFQSIKGE-UHFFFAOYSA-N [Mg].[Si] Chemical compound [Mg].[Si] MKPXGEVFQSIKGE-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- -1 alkaline-earth metal salt Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052728 basic metal Inorganic materials 0.000 description 1
- 150000003818 basic metals Chemical class 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000003599 food sweetener Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009868 nickel metallurgy Methods 0.000 description 1
- LVIYYTJTOKJJOC-UHFFFAOYSA-N nickel phthalocyanine Chemical compound [Ni+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 LVIYYTJTOKJJOC-UHFFFAOYSA-N 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000003765 sweetening agent Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a method for producing high-nickel-grade nickel-iron powder by laterite-nickel ore autocatalytic reduction, belonging to the field of comprehensive utilization of mineral resources. The method comprises the following steps: proportionally mixing powdery laterite-nickel ores, a reducer and an adhesive, pelletizing, carrying out reduction roasting on the carbonous pellets at high temperature, cooling, carrying out multistage grinding, carrying out low-intensity magnetic separation, carrying out medium-intensity scavenging on the magnetic tailings, and returning the scavenger concentrate to the raw ores for pelletizing. The returned product has the characteristic of small particle size and contains a small amount of nickel-iron metal particles; and the returned product has the following functions: the fine particles are filled in the slits among the coarse particles, thereby enhancing the pellet strength in the pelletizing process; and in the roasting process, the metal iron promotes the reduction of nickel through the catalytic coal gasification, and is used as the nucleating agent of the newly generated metal nickel-iron particles to promote the accumulation and growth of the metal nickel-iron particles. Compared with the existing coal-base direct reduction-magnetic separation technique, the method provided by the invention has the advantage of obviously higher nickel recovery rate and nickel grade, wherein the nickel recovery rate is up to 90%, and the nickel grade can reach more than 10%.
Description
Technical field
The present invention relates to engineering of comprehensive utilization of mineral field, refer to that especially a kind of red soil nickel ore self catalyzed reduction produces the method for nickelic grade ferronickel powder.
Background technology
In recent years, along with easily selecting the quick consumption of nickelous sulfide resource, global nickel industry is transferred to the abundant red soil nickel ore of reserves (low-grade nickel oxide ore) resource by the emphasis of development of resources.Traditional limonite type red soil nickel ore wet processing mainly comprises the techniques such as high pressure acidleach, reduction roasting-ammonia leaching and normal pressure acidleach; The pyrogenic attack of silicon magnesium type red soil nickel ore comprises the techniques such as electric furnace reduction nickel metallurgy iron alloy and sulfiding smelting output nickel matte.There is the high or inefficient problem of energy consumption in these traditional technologys.For finding new more effective red soil nickel ore treatment process, domestic scholars has been developed red soil nickel ore reduction roasting magnetic separation process recently.The method is to take coal as reductive agent, at a certain temperature red soil nickel ore is reduced, and making nickel and iron direct-reduction in red soil nickel ore is metal, then by mill ore magnetic selection, reclaims nickel and the iron after reduction, and what obtain is the ferronickel of powdery, is called ferronickel powder.The technique that reduction roasting magnetic separation method is processed red soil nickel ore has that cost is low, save energy, nickel recovery high.This technique is that new approach has been opened up in the exploitation of red soil nickel ore.
But in this technique, in order to realize high efficiente callback and to obtain high-quality metal nickel-iron product, conventionally need to add alkali metal containing or alkaline-earth metal material as additive, as sodium carbonate, sodium sulfate etc.These additives mainly contain two aspect effects, and the one, catalysis gasification, thus the reduction of promotion iron mineral improves iron recovery; The secondth, as fusing assistant, improve the reactive behavior of nickeliferous silicate, optimize the agglomeration condition of metal nickel-iron particle, be convenient to the recovery of ferronickel particle, and optimize removing of impurity, improve the quality of products.Although adopt these additives to have as above advantage, also increased production cost.
Meanwhile, in patent or paper in the past, researchist adopts one section or multistage grinding, magnetic separation to obtain last reduced nickel iron powder to roasting product conventionally, but to roughly selecting and the processing of selected operation mine tailing does not explain.Approximately there is 15～20% nickel to be lost in mine tailing, nickel in this part mine tailing is mainly to exist with minute metallic ferronickel particle, but because granularity superfine (conventionally below 10 μ m), in low intensity magnetic separation process, be difficult to be captured and enter into mine tailing, caused the waste of resource.
Therefore, the present invention further reclaims by the nickel in mine tailing, adds in pelletizing process as additive simultaneously, not only can Substitute For Partial additive, optimize direct-reduction roasting process, also improved the rate of recovery of metallic nickel, significant for effectively utilizing of red soil nickel ore resource.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method that red soil nickel ore self catalyzed reduction is produced nickelic grade ferronickel powder.
The main processes of the method is as follows: first, powdery red soil nickel ore by granularity below 2mm with granularity the reductive agent coal below 2mm, additive according to 1:(0.05～0.1): the mass ratio of (0.05～0.15) mixes, add again 8%～12% water, after mixing, on ball press, be pressed into carbonaceous pelletizing; Then dry carbonaceous pelletizing is carried out to direct-reduction roasting, after the pelletizing fragmentation after roasting, after primary grinding-low intensity magnetic separation, obtain one section of concentrate and one section of mine tailing; The one section of concentrate obtaining obtains reduced nickel iron powder (nickel recovery reaches 85%, and nickel grade is higher than 8%) and two sections of mine tailings after secondary grinding-low intensity magnetic separation; The one section of mine tailing obtaining directly carries out middle magnetic to be scanned, and obtains scavenger concentrate and mine tailing; After two sections of mine tailings that obtain and scavenger concentrate are merged, turn back to the pressure ball process that mixes, continue to participate in pelletizing; Now, the interpolation scope of additive can be contracted to 2%～10%, pass through again direct-reduction roasting-ore grinding-magnetic separation process same as described above, (rate of recovery of nickel reaches 90% to obtain nickelic grade ferronickel powder, nickel grade is higher than 10%), two sections of mine tailings of generation and scavenger concentrate turn back to pressure ball process after merging.
Wherein, in red soil nickel ore, nickel grade is 1.4%～2.0%, and iron grade is between 25%～35%; Additive is the combination of lime and sodium sulfate, and wherein the mass ratio of lime and sodium sulfate is 0～1:1; The temperature range of dry carbonaceous pelletizing direct-reduction roasting is 1150 ℃～1250 ℃, and the time of reducing roasting is 20～60min; The ore milling concentration of primary grinding and secondary grinding is 60%～70%; Primary grinding fineness accounts for 60%～80% for-0.074mm, and secondary grinding fineness accounts for 85%～95% for-0.074mm; The magneticstrength scope of low intensity magnetic separation is 80～110kA/m, and the magneticstrength scope that middle magnetic is scanned is 140～160kA/m.
Principle of the present invention is: in one section of mine tailing, nickel mainly exists with the form of metal nickel-iron particle, but granularity is conventionally below 10 μ m, scan operation can efficient recovery by improving magneticstrength.And two sections of mine tailings contain fine-graded metal nickel-iron particle equally, two sections of mine tailings and scavenger concentrate and powdery red soil nickel ore mixed pelletizing, can improve the balling-up of material, improves pellet strength.Metallic iron is the catalyzer of gasification in addition, and coal gasification reaction is the important control step of carbonaceous pelletizing direct-reduction calcination, so add after the product of this part containing metal ferronickel, thereby can catalysis gasification promote ferronickel mineral reduction, improve the rate of recovery of nickel.Simultaneously, this part metal nickel-iron particle can be used as the nucleator of newly-generated metal nickel-iron particle, promote growing up of metallic particles, in two sections of mine tailings that return in addition and scavenger concentrate, contain a lot of intergrowth particles, can contain the mineral that the promotion ferronickel particles such as FeS are grown up.Its effect is similar to the effect of the basic metal adding at present or alkaline-earth metal salt, therefore can play the effect that part substitutes additive.
Utilize processing method of the present invention effectively from red soil nickel ore, to obtain nickeliferous more than 10%, nickel recovery reach 90% and other foreign matter contents meet the ferronickel powder of iron-making and steel-making raw material standard.Compared with the conventional method, the inventive method has following features: (1) has comprehensively reclaimed the nickel composition in rougher tailings and two sections of mine tailings, closed circuit flow process nickel recovery is reached more than 90%, apparently higher than current flow process; (2) two sections of mine tailings and scavenger concentrate return to pelletizing, have improved the balling-up of material, can reduce additive amount; Metallic iron in (3) two sections of mine tailings and scavenger concentrate can catalysis gasification and is served as the nucleator of newly-generated metal nickel-iron particle, thereby promoted the reduction of nickel oxide and the growth of metal nickel-iron particle, the probability of ferronickel particle loss in mine tailing reduced; (4) in two sections of mine tailings that return and scavenger concentrate, contain a lot of intergrowth particles, can contain the mineral that the promotion ferronickel particles such as FeS are grown up, the effect of the additive of its effect and alkali metal containing or alkaline-earth metal is similar, thereby can reduce additive amount; (5) due to the recovery of one section of mine tailing, reduced the discharge of true tailings, make more environmental protection of technique.
Accompanying drawing explanation
Fig. 1 is the technical process that nickelic grade ferronickel powder is produced in red soil nickel ore autocatalysis of the present invention.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The present invention is directed to the low problem of existing processing red soil nickel ore nickel recovery, provide a kind of red soil nickel ore autocatalysis to produce the method for nickelic grade ferronickel powder.
As shown in Figure 1, for red soil nickel ore autocatalysis of the present invention, produce the process flow sheet of nickelic grade ferronickel powder, by row as concrete in workflow graph, be illustrated for two example two.
Embodiment 1
Certain red soil nickel ore iron content 34.69%, nickeliferous 1.49%.Crushing raw ore accounts for 100% to-2mm, adds 5% reductive agent coal, adds 10% sodium sulfate, adds water 11% left and right and mixes at roll type ball press upper pressing ball, and the carbonaceous pelletizing green-ball that obtains is anti-falls intensity average out to 7 times/, ultimate compression strength 48N/; Dried dry bulb is anti-, and to fall intensity be 9 times/, and ultimate compression strength is 360N/.Then reducing roasting 50min at 1200 ℃ in retort furnace.The cooling rear be first crushed to-2mm of roasted ore, then adopts stage grinding, sorts, and primary grinding concentration is 68%, and fineness accounts for 65% for-0.074mm, and secondary grinding concentration is 62%, and fineness accounts for 95% for-0.074mm, and two stages of magnetic separation field intensity is intensity 89.6kA/m.Final acquisition nickel grade is 9.82%, and nickel recovery is 86.32%, and other foreign matter contents meet the reduced nickel iron powder of steel-making requirements, and obtain two sections of mine tailings.
By one section of mine tailing, adopt the field intensity of 150kA/m to carry out middle magnetic and scan, obtain nickeliferous 9.7%, the chats product that nickel recovery is 9.1%.By this chats product and two sections of mine tailings pelletizing together with raw ore and reductive agent, at sodium sulfate consumption, be 7%, the carbonaceous pelletizing green-ball that obtains under the identical condition of other pressure ball conditions is anti-falls intensity average out to 8 times/, ultimate compression strength 67N/; Dried dry bulb is anti-, and to fall intensity be 12 times/, and ultimate compression strength is 454N/.Pelletizing is processed through aforementioned flow process again, and finally obtaining nickel grade is 11.12%, and nickel recovery is 90.32%, and other foreign matter contents meet high-purity reduced nickel iron powder of steel-making requirements.
Embodiment 2
Certain red soil nickel ore, iron content 26.68%, nickeliferous 1.46%.Crushing raw ore accounts for 100% to-1mm, adds 5% reductive agent coal, and take 5% lime and 10% sodium sulfate is mixed sweetening agent, adds water 10%, mixes at roll type ball press upper pressing ball.The carbonaceous pelletizing green-ball that obtains is anti-falls intensity average out to 7 times/, ultimate compression strength 50N/; After pelletizing is dry, anti-to fall intensity be 9 times/, and ultimate compression strength is 156N/.Carbonaceous pelletizing is placed in to reducing roasting 50min at 1150 ℃ of retort furnaces; The cooling rear be first crushed to-2mm of roasted ore, then adopts stage grinding, sorts, and primary grinding concentration is 65%, and fineness accounts for 65% for-0.074mm, and secondary grinding concentration is 60%, and fineness accounts for 95% for-0.074mm, and two stages of magnetic separation field intensity is intensity 89.6kA/m.Final nickel content 9.01%, the nickel recovery 85.79% of obtaining, other foreign matter contents meet the reduced nickel iron powder of steel-making requirements, and obtain two sections of mine tailings.
By one section of mine tailing, adopt the field intensity of 150kA/m to carry out middle magnetic and scan, obtain nickeliferous 9.8%, the chats product that nickel recovery is 8.9%.By this chats product and two sections of mine tailings pelletizing together with raw ore and reductive agent, at lime consumption, be 3%, sodium sulfate consumption is 6%, the carbonaceous pelletizing green-ball that obtains in the identical situation of other pressure ball conditions is anti-falls intensity average out to 7 times/, ultimate compression strength 58N/; Dried dry bulb is anti-, and to fall intensity be 9 times/, and ultimate compression strength is 165N/.Pelletizing is processed through aforementioned flow process again, finally obtains nickel content 10.20%, nickel recovery 90.43%, and other foreign matter contents meet high-purity reduced nickel iron powder of steel-making requirements.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. the method that red soil nickel ore self catalyzed reduction is produced nickelic grade ferronickel powder, it is characterized in that: by powdery red soil nickel ore with reductive agent, additive according to 1:(0.05～0.1): the mass ratio of (0.05～0.15) mixes, add again 8%～12% water, after mixing, on ball press, be pressed into carbonaceous pelletizing; Then dry carbonaceous pelletizing is carried out to direct-reduction roasting, after the pelletizing fragmentation after roasting, after primary grinding-low intensity magnetic separation, obtain one section of concentrate and one section of mine tailing; The one section of concentrate obtaining obtains reduced nickel iron powder and two sections of mine tailings after secondary grinding-low intensity magnetic separation; The one section of mine tailing obtaining directly carries out middle magnetic to be scanned, and obtains scavenger concentrate and mine tailing; After two sections of mine tailings that obtain and scavenger concentrate are merged, turn back to pressure ball process, continue to participate in pelletizing; In the reduced nickel iron powder obtaining, nickel recovery reaches 85%, nickel grade reaches more than 8%.
2. the method that a kind of red soil nickel ore self catalyzed reduction according to claim 1 is produced nickelic grade ferronickel powder, is characterized in that: in described red soil nickel ore, nickel grade is 1.4%～2.0%, and iron grade is between 25%～35%; Powdery red soil nickel ore granularity is below 2mm; Described reductive agent is coal, and granularity is below 2mm; Described additive is the combination of lime and sodium sulfate, and wherein the mass ratio of lime and sodium sulfate is 0～1:1.
3. the method that a kind of red soil nickel ore self catalyzed reduction according to claim 1 is produced nickelic grade ferronickel powder, it is characterized in that: the temperature range of dry carbonaceous pelletizing direct-reduction roasting is 1150 ℃～1250 ℃, and the time of reducing roasting is 20～60min.
4. the method that a kind of red soil nickel ore self catalyzed reduction according to claim 1 is produced nickelic grade ferronickel powder, is characterized in that: the ore milling concentration of primary grinding and secondary grinding is 60%～70%; Primary grinding fineness accounts for 60%～80% for-0.074mm, and secondary grinding fineness accounts for 85%～95% for-0.074mm; The magneticstrength scope of low intensity magnetic separation is 80～110kA/m, and the magneticstrength scope that middle magnetic is scanned is 140～160kA/m.
5. the method that nickelic grade ferronickel powder is produced in a kind of red soil nickel ore autocatalysis according to claim 1, it is characterized in that: two sections of mine tailings after roasting and scavenger concentrate are returned to pelletizing after raw ore, wherein the interpolation scope of additive is 2%～10%, in the nickelic grade ferronickel powder obtaining after direct-reduction roasting-magnetic separation, nickel recovery reaches 90%, and nickel grade reaches more than 10%.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105463216A (en) * | 2015-11-27 | 2016-04-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Comprehensive utilization method of high-iron, high-aluminum and low-nickel type laterite-nickel ore |
| CN106784784A (en) * | 2015-11-20 | 2017-05-31 | 中国科学院宁波材料技术与工程研究所 | A kind of nickel cobalt manganese presoma and preparation method thereof |
| CN109013051A (en) * | 2018-07-12 | 2018-12-18 | 张雷 | A kind of method and device of coal-based direct reduction magnetic separation production Langaloy |
| CN109355492A (en) * | 2018-11-08 | 2019-02-19 | 昆明理工大学 | A method of dilval is prepared using low-grade laterite nickel ore |
| CN112410541A (en) * | 2021-01-25 | 2021-02-26 | 矿冶科技集团有限公司 | Preparation method of magnetic concentrate, magnetic concentrate and application thereof, and method for enriching heavy metal by metallization reduction of iron-containing multi-metal oxide ore |
| CN112458278A (en) * | 2021-01-25 | 2021-03-09 | 矿冶科技集团有限公司 | Application and preparation method of cobalt-nickel-iron multi-element alloy concentrate and cobalt-manganese multi-metal oxide ore dressing-smelting combined method for solid-phase metallization reduction |
| CN113000218A (en) * | 2021-02-09 | 2021-06-22 | 矿冶科技集团有限公司 | Collecting agent for cobalt-manganese multi-metal oxide ores and preparation method and application thereof |
| CN113174459A (en) * | 2021-04-13 | 2021-07-27 | 中国科学院过程工程研究所 | Method for preparing secondary reduced iron powder by using iron ore concentrate |
| CN113957246A (en) * | 2021-10-29 | 2022-01-21 | 张雷 | Method and device for producing high-nickel alloy and reduced iron through coal-based coking magnetic separation |
| CN114032405A (en) * | 2021-11-17 | 2022-02-11 | 昆明理工大学 | Method for promoting growth of ferronickel alloy particles in process of producing ferronickel from laterite-nickel ore |
| CN114318005A (en) * | 2022-01-04 | 2022-04-12 | 中南大学 | Method for preparing high-grade nickel product by treating low-grade laterite-nickel ore with microwave |
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