CN108149008A - To discard lump ore as the method for lateritic nickel ore hearth layer for sintering - Google Patents
To discard lump ore as the method for lateritic nickel ore hearth layer for sintering Download PDFInfo
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- CN108149008A CN108149008A CN201810025632.1A CN201810025632A CN108149008A CN 108149008 A CN108149008 A CN 108149008A CN 201810025632 A CN201810025632 A CN 201810025632A CN 108149008 A CN108149008 A CN 108149008A
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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
- C22B1/16—Sintering; Agglomerating
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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
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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
- C22B23/00—Obtaining nickel or cobalt
- C22B23/005—Preliminary treatment of ores, e.g. by roasting or by the Krupp-Renn process
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a kind of using discarded lump ore as the method for lateritic nickel ore hearth layer for sintering, include the following steps：Low-grade discarded lump ore is crushed and sieved, by the particle that grain size is 10~16mm, is layered on sintering motor spindle as bottom material；Grain size is less than 10mm grades and participates in dispensing as lateritic nickel ore raw material；Lateritic nickel ore, powder of returning mine, fuel and quick lime are mixed to get mixture；Adjusting mixture moisture is 16%~18wt%, and mixing granulation obtains sintering feed；Sintering feed is layered on bottom material top, lighted a fire, be sintered to obtain heat sinter；After heat sinter is cooled down, crushing and screening obtains finished product sinter.Method provided by the invention can improve lateritic nickel ore permeability of sintering material bed, effectively improve the yield rate and yield of sinter, improve its sintering character, protect pallet, while reach and low-grade discarded lump ore is efficiently used.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, it particularly relates to which a kind of burnt using discarded lump ore as lateritic nickel ore
The method for tying grate-layer material.
Background technology
Nickel resources are divided into two class of nickel sulfide ore and nickel ore, nickel ore, that is, lateritic nickel ore in world wide.Generation at present
The nickel product on boundary upper 40% or so originates from lateritic nickel ore, remaining both is from nickel sulfide ore, but the sulphur with high-grade, easily exploited
Change the excessive exploitation of nickel minerals and the influence of smelting laterite-nickel ores technique increasingly factors such as maturation, with lateritic nickel ore production nickel production
Product just gradually become world.
Lateritic nickel ore is mainly distributed on the tropic countries within 30 ° of equatorial line north and south in world wide, has verified land
About 80,000,000 t of nickel ore resource reserves, mainly have Cuba（23000000 t）, Indonesia（13000000 t）, Philippine（1100
Ten thousand t）, Australia（11000000 t）, New Caledonia（14000000 t）Deng wherein nickel sulfide ore only accounts for 20%, and lateritic nickel ore is about
75% is accounted for, and silicic acid nickel minerals accounts for 5%.The lateritic nickel ore in China is mainly distributed on the meeting reason in Sichuan Province, the Yuanjiang River in Yunnan Province and Mojiang
And the areas such as first Stone Mountain in Qinghai Province.Lateritic nickel ore reserves account for about the 9.6% of national nickel resources reserves, and nickel sulfide ore
Account for the 86% of national nickel resources reserves.Since domestic lateritic nickel ore reserves are relatively fewer, China is every year from Philippine and India
The a large amount of lateritic nickel ore of Nicaea import, significant fraction rely on import.
At present, China takes pyrometallurgical smelting ferronickel more universal, is roughly divided into sintering-blast furnace process, nickel and low nickel in production
Product；Rotary kiln electric furnace process（RKEF methods）, produce high ferronickel.Since most of high-grade lateritic nickel ore resource is by institute of Western power
Control, and price is expensive, and most of ferronickel manufacturers of China can only use middle-low grade lateritic nickel ore resource.It is and low-grade
Lateritic nickel ore, since its mechanical water and crystal water content height, scaling loss are big, causes its sinter firing rate low in sintering process,
Yield is few.If doing hearth layer for sintering using its finished product ore deposit, sintering circulated material quantity is big, can lead to lateritic nickel ore sintering output more
It is low.And if finished product ore deposit is not used to make grate-layer material, it is unfavorable for protecting pallet.Meanwhile in processes, low-grade laterite nickel
During ore resources, when crushing raw ore sieves, inevitably a large amount of low-grade discarded lump ores of output, ratio account for raw ore amount
5-10%, nickeliferous 0.6~0.8% or so, nickel, iron content are low, and silicon, content of magnesium are high, it is difficult to utilize, lead to the wave of nickel resources
Take, and easily cause heavy metal secondary pollution.Because sintering is less than 10mm or 8mm to granularity requirements, crushing and screening is carried out in raw ore
When will appear a large amount of lump ores, and the nickel content that these lump ores contain is more much lower than sieving lower fine ore, directly enter stove go smelting without
Ji, can only discard can not utilize in stock ground at present.
There are similar patent or article to introduce hearth layer for sintering substitution method at present：
A kind of sintering method of hearth layer for sintering（CN201510137672.1）：The method utilizes and is sintered dust, gas ash, converter
According to a certain ratio, using ion dust mud contaning pelletizer, the grate-layer material bead of 7~20mm is made in dirt, bentonite etc..The method can be with
Save a large amount of finished product sinter and lump ore resource, improve sinter yield rate and yield by a relatively large margin, reduce fuel consumption and
Production cost；Meanwhile and the various ion dust mud contanings generated in steel manufacture process can be made full use of, turn waste into wealth, reduce environment
Pollution.It is easily rupturable to scatter but there is also bead intensity after drying is low, the deficiency of a large amount of dust is regenerated, seriously affects sintering
Dust pelletizing system and exhausting system.
Application of the limonite in production pelletizing or sinter method as grate-layer material（CN01145342.7, CN
103160683 A）：The method is in routinely pellet agglomerate method is produced, and using 10~25mm limonites as grate-layer material, is carried
High sintering engine efficiency, improves pellet agglomerate yield rate and usage factor, reduces solid burnup, improve limonite
Grade.It also discusses and is had studied by the use of limonite lump ore or other lump ores as the method for hearth layer for sintering in related article, but
These limonite lump ores are not solid waste, are without the preprocessed furnace charge that can be directly entered blast furnace process, by this
Class lump ore, which is brought, does hearth layer for sintering, be only the thermal current that is generated using sintering remove the crystallization water that contains in these lump ores or
Carbonate, it is impossible to play the purpose of the solid waste utilization of resources, also not achieve the purpose that improve blast furnace feeding furnace charge yield.Mesh
Before, it there are no the side that its hearth layer for sintering is made in article or patent proposition of the low-grade discarded lump ore of lateritic nickel ore itself output
Method, and the method that its hearth layer for sintering is done with the low-grade discarded lump ore of itself output, compared to limonite lump ore or other iron
Nugget ore deposit does grate-layer material, has the double dominant for making full use of low-grade waste resource and improving Sintering Yield.
Invention content
The present invention provides a kind of methods that low-grade discarded lump ore makees lateritic nickel ore hearth layer for sintering, can using the technique
To improve lateritic nickel ore permeability of sintering material bed, the yield rate and yield of sinter are effectively improved, improves its sintering character, is protected
Pallet, while reach and low-grade discarded lump ore is efficiently used.
To realize the above-mentioned technical purpose, the technical proposal of the invention is realized in this way：
It is a kind of using discarded lump ore as the method for lateritic nickel ore hearth layer for sintering, include the following steps：
S1, low-grade discarded lump ore is crushed and sieved, by grain size be 10mm~16mm particle, be layered on sintering motor spindle as
Bottom material；Grain size is less than 10mm grades and participates in dispensing as lateritic nickel ore raw material；By lateritic nickel ore, powder of returning mine, fuel and quick lime
It is mixed to get mixture；
S2, the mixture moisture is adjusted as 16wt%~18wt%, mixing granulation obtains sintering feed；
S3, the sintering feed is layered on the bottom material top, is lighted a fire, is sintered to obtain heat sinter；
S4, by the heat sinter cool down after, crushing and screening obtains finished product sinter.
Above-mentioned method, it is preferred that the fuel is anthracite.
Above-mentioned method, it is preferred that in the S1 steps, the mass percentage of the lateritic nickel ore for 51.5wt%~
57wt%, the powder of returning mine mass percentage be 30wt%, the quality of fuel percentage composition is 7wt%~8.5wt%, institute
The mass percentage for stating quick lime is 6wt%~10wt%.
Above-mentioned method, it is preferred that in the S1 steps, the nickel grade of the low-grade discarded lump ore for 0.8%~
1.4%, Iron grade is less than 20%；The thickness of the bottom material is 10mm~30mm.
Above-mentioned method, it is preferred that in the S2 steps, in the processes of mixing and granulating, mixing machine rotating speed 25rmin-1, pack completeness 15%, Granulation time 5min.
Above-mentioned method, it is preferred that it is characterized in that, in the S2 steps, the bed depth of the sintering feed is 680mm
~800mm；It is 95 more than % that grain size, which is more than 0.5mm, in the sintering feed, and particle of the grain size more than 1mm is 80 more than %.
Above-mentioned method, it is preferred that in the S3 steps, in the ignition process, firing temperature is 1100 ± 50 DEG C, point
Fiery negative pressure 4kPa~6kPa, the duration of ignition are 1.5min~2.5min.
Above-mentioned method, it is preferred that in the S3 steps, in the sintering process, sintering high temperature band temperature is 1300
DEG C~1450 DEG C, sintering time is 20min~25min, and sintering negative pressure is 9kPa~12kPa.
Above-mentioned method, it is preferred that in the S4 steps, broken the low-grade discarded lump ore using jaw crusher
It is broken, it is sieved using vibration screen for mineral.
Compared with prior art, the advantage of the invention is that：
（1）The present invention provides a kind of to discard lump ore as the method for lateritic nickel ore hearth layer for sintering, lateritic nickel ore sintering paving
Bottom material usually requires the finished product sinter of granularity 10mm~16mm to do grate-layer material, but the yield rate of lateritic nickel ore sintering is very low,
If also separating a part from finished product to do grate-layer material, finished product sinter will be less, and sintering machine yield can be lower, so mesh
Preceding overwhelming majority lateritic nickel ore sintered production line does not have to grate-layer material, trolley grid section is caused to burn, dust concentration ten in sintering flue gas
The problem of high is divided easily to form wet bands for lateritic nickel ore hearth layer for sintering selection difficulty and lateritic nickel ore sintering moisture height and cause
The characteristics of permeability of sintering material bed is poor develops and makees lateritic nickel ore hearth layer for sintering using low-grade discarded lump ore, reduces sintering
The overly moist phenomenon of bed of material bottom improves permeability of sintering material bed, protects trolley grid section and reduces the key of sintering flue gas dustiness
Technology.The limonite of bead, CN01145342.7 compared to the CN201510137672.1 mentioned in background technology, to improving
Permeability of sintering material bed is better.Meanwhile method of the invention improves sinter bed air flow method, is ensureing that pallet is suitable
Under the premise of row, sintering output is improved, efficiently uses low-grade discarded lump ore.
（2）The present invention provides a kind of to discard lump ore as the method for lateritic nickel ore hearth layer for sintering, for laterite nickel
Low-grade discarded lateritic nickel ore lump ore during ore resources exploitation utilizes is difficult to be utilized and wastes nickel resources, grate-layer material of the present invention
Discarded lump ore is derived from, it is at low cost, nickel metal can be fully recycled, high financial profit has good development prospect.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the process flow chart of the embodiment of the present invention 1.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's all other embodiments obtained belong to what the present invention protected
Range.
Material and instrument employed in following embodiment are commercially available.Wherein, the Iron grade 44%~50% of lateritic nickel ore,
Nickel content 0.8%~1.4%.
Embodiment 1
A kind of present invention using discarded lump ore as the method for lateritic nickel ore hearth layer for sintering, referring to Fig. 1, include the following steps：
（1）Discarded lump ore pretreatment：By nickel grade 1.0%, the low-grade discarded lump ore of Iron grade 18% is broken using jaw crusher
It is broken, particle that grain size is 10~16mm is screened out as hearth layer for sintering by the use of vibration screen for mineral respectively；Grain size is less than of 10mm
Grain is mixed with lateritic nickel ore powder, as lateritic nickel ore powder raw material.
（2）Dispensing：By the lateritic nickel ore of the nickeliferous grade 1.4% of 55wt%, the powder of returning mine of 30wt%, 7.5wt% anthracites,
The quick lime mixing of 7.5wt%, obtains mixture.
（3）Mixing granulation：Water is added in mixture, the moisture for adjusting mixture is 17.0%.It is mixed in trommel mixer
It closes, control mixing machine rotating speed 25rmin-1, pack completeness 15%, Granulation time 5min, obtain moisture be 17.0% sintering feed, burn
It is 96 wt% that granularity, which is more than 0.5mm, in ramming material, and particle of the grain size more than 1mm is 85 wt%.
（4）Igniting：By step（1）Middle grain size is that the low-grade discarded lump ore of 10~16mm is layered on sintering motor spindle, shop fixtures
Expect thickness 18mm（Sintered material calculating is counted, accounts for the 3% of sintering feed）, by step（3）Sintering feed be layered on low-grade discarded lump ore
On, wherein the bed depth of sintering feed is 680mm.Control igniting negative pressure is 5kPa, and firing temperature is 1100 DEG C, and the duration of ignition is
2.5min lights a fire.
（5）Sintering：Negative pressure 10kPa is sintered, 1350 DEG C of sinter bed maximum temperature, sintering time 21.5min is sintered
Ore deposit.
（6）Cooling, broken, screening：Sinter is cooled down（Cool down negative pressure 5kPa, cooling time 5min）Afterwards, sinter is broken
Broken and screening, obtains the finished product sinter of+5mm and the powder of returning mine of -5mm.
Sintered ore rotary drum strength 46.67%, yield rate 63.49%, usage factor 1.09tm-2·h-1, solid burnup
138.20 Kg/t。
Embodiment 2
A kind of present invention using discarded lump ore as the method for lateritic nickel ore hearth layer for sintering, include the following steps：
（1）Discarded lump ore pretreatment：By nickel grade 0.8%, the low-grade discarded lump ore of Iron grade 18% uses jaw crushing crusher machine,
Particle that grain size is 10~16mm is screened out as hearth layer for sintering by the use of vibration screen for mineral respectively；Grain size less than 10mm particle with
Lateritic nickel ore powder mixes, as lateritic nickel ore powder raw material.
（2）Dispensing：By the lateritic nickel ore of the nickeliferous grade 1.4% of 53.5wt%, the powder of returning mine of 30wt%, 7.5wt% anthracites,
The quick lime mixing of 9wt%, obtains mixture.
（3）Mixing granulation：Water is added in mixture, the moisture position for adjusting mixture is 17.0%.In trommel mixer
Mixing, control mixing machine rotating speed 26rmin-1, pack completeness 18%, Granulation time 5min, obtain moisture be 17.0% sintering feed,
It is 95 wt% that granularity, which is more than 0.5mm, in sintering feed, and particle of the grain size more than 1mm is 90 wt%.
（4）Igniting：By step（1）Middle grain size is that the low-grade discarded lump ore of 10~16mm is layered on sintering motor spindle, shop fixtures
Expect thickness 26mm（Sintered material calculating is counted, accounts for the 5% of sintering feed）, by step（3）Sintering feed be layered on low-grade discarded lump ore
On, the bed depth of sintering feed is 750mm.Control igniting negative pressure is 6kPa, and firing temperature is 1150 DEG C, and the duration of ignition is
2.5min lights a fire.
（5）Sintering：Negative pressure 10kPa is sintered, 1400 DEG C of sinter bed maximum temperature, sintering time 23min obtains sinter.
（6）Cooling, broken, screening：Sinter is cooled down（Cool down negative pressure 5kPa, cooling time 5min）Afterwards, it crushes and sieves
Point, obtain the finished product sinter of+5mm and the powder of returning mine of -5mm.
Sintered ore rotary drum strength 48.27%, yield rate 66.29%, usage factor 1.08tm-2·h-1, solid burnup
129.07Kg/t。
Embodiment 3
A kind of present invention using discarded lump ore as the method for lateritic nickel ore hearth layer for sintering, include the following steps：
（1）Discarded lump ore pretreatment：By nickel grade 1.2%, the low-grade discarded lump ore of Iron grade 16% uses jaw crushing crusher machine,
Particle that grain size is 10~16mm is screened out as hearth layer for sintering by the use of vibration screen for mineral respectively；Grain size less than 10mm particle with
Lateritic nickel ore powder mixes, as lateritic nickel ore powder raw material.
（2）Dispensing：By the low-grade laterite nickel ore of the nickeliferous grade 1.4% of 51.5wt%, powder of returning mine, the 8.5wt% of 30wt%
The quick lime mixing of anthracite, 10wt%, obtains mixture.
（3）Mixing granulation：Water is added in mixture, the moisture position for adjusting mixture is 17.0%.In trommel mixer
Mixing, control mixing machine rotating speed 25rmin-1, pack completeness 15%, Granulation time 5min, obtain moisture be 16.5.0% sintering
Expect, it is 97 wt% that granularity, which is more than 0.5mm, in sintering feed, and particle of the grain size more than 1mm is 88wt%.
（4）Igniting：By step（1）Middle grain size is that the low-grade discarded lump ore of 10~16mm is layered on sintering motor spindle, shop fixtures
Expect thickness 30mm（Sintered material calculating is counted, accounts for the 6.5% of sintering feed）, by step（3）Sintering feed be layered on low-grade discarded block
In ore deposit, the bed depth of sintering feed is 780mm.Control igniting negative pressure is 6kPa, and firing temperature is 1150 DEG C, and the duration of ignition is
2.5min lights a fire.
（5）Sintering：Negative pressure 12kPa is sintered, 1450 DEG C of sinter bed maximum temperature, sintering time 22min obtains sinter.
（6）Cooling, broken, screening：Sinter is cooled down（Cool down negative pressure 5kPa, cooling time 5min）Afterwards, it crushes and sieves
Point, obtain the finished product sinter of+5mm and the powder of returning mine of -5mm.
Sintered ore rotary drum strength 50.53%, yield rate 67.22%, usage factor 1.10tm-2·h-1, solid burnup
126.97Kg/t。
Embodiment 4
A kind of present invention using discarded lump ore as the method for lateritic nickel ore hearth layer for sintering, include the following steps：
（1）Discarded lump ore pretreatment：By nickel grade 1.2%, the low-grade discarded lump ore of Iron grade 16% is broken using jaw crusher
It is broken, particle that grain size is 10~16mm is screened out as hearth layer for sintering by the use of vibration screen for mineral respectively；Grain size is less than of 10mm
Grain is mixed with lateritic nickel ore powder, as lateritic nickel ore powder raw material.
（2）Dispensing：By the low-grade laterite nickel ore of the nickeliferous grade 1.4% of 51.5wt%, powder of returning mine, the 8.5wt% of 30wt%
The quick lime mixing of anthracite, 10wt%, obtains mixture.
（3）Mixing granulation：Water is added in mixture, the moisture position for adjusting mixture is 17.0%.In trommel mixer
Mixing, control mixing machine rotating speed 25rmin-1, pack completeness 15%, Granulation time 5min, obtain moisture be 16.5% sintering feed,
It is 97 wt% that granularity, which is more than 0.5mm, in sintering feed, and particle of the grain size more than 1mm is 88 wt%.
（4）Igniting：By step（1）Middle grain size is that the low-grade discarded lump ore of 10~16mm is layered on sintering motor spindle, shop fixtures
Expect thickness 20mm（Sintered material calculating is counted, accounts for the 4% of sintering feed）, by step（3）Sintering feed be layered on low-grade discarded lump ore
On, the bed depth of sintering feed is 780mm.Control igniting negative pressure is 6kPa, and firing temperature is 1150 DEG C, and the duration of ignition is
2.5min lights a fire.
（5）Sintering：Negative pressure 12kPa is sintered, 1450 DEG C of sinter bed maximum temperature, sintering time 25min obtains sinter.
（6）Cooling, broken, screening：Sinter is cooled down（Cool down negative pressure 5kPa, cooling time 5min）Afterwards, it crushes and sieves
Point, obtain the finished product sinter of+5mm and the powder of returning mine of -5mm.
Sintered ore rotary drum strength 49.33%, yield rate 63.23%, usage factor 1.03tm-2·h-1, solid burnup
135.29Kg/t。
Comparative example 1
Step（4）In, low-grade discarded lump ore is not spread in sintering motor spindle, remaining condition is consistent with embodiment 1.
Sintered ore rotary drum strength 45.87%, yield rate 64.88%, usage factor 0.97tm-2·h-1, solid burnup
140.52Kg/t。
Comparative example 2
Step（4）In, finished product sinter is layered on sintering motor spindle instead of low-grade discarded ore deposit, remaining condition and embodiment 1 one
It causes.
Sintered ore rotary drum strength 48.67%, yield rate 56.86%, usage factor 0.90tm-2·h-1, solid burnup
159.93Kg/t。
The data obtained from above-described embodiment：Method using the present invention, sintered ore rotary drum strength 46.67~
50.53%, yield rate 63.23~67.22%, 1.03~1.10tm of usage factor-2·h-1, solid burnup 126.97~
138.2Kg/t.Compared with 1 data of comparative example, in optimal conditions（Embodiment 3）, sintered ore rotary drum strength, yield rate and utilization
Coefficient increase rate is respectively 10%, 3%, more than 13%, and solid burnup reduces amplitude and is more than 9%, and sintering character is obviously improved.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (9)
- It is 1. a kind of to discard lump ore as the method for lateritic nickel ore hearth layer for sintering, which is characterized in that include the following steps：S1, low-grade discarded lump ore is crushed and sieved, by grain size be 10mm~16mm particle, be layered on sintering motor spindle as Bottom material；Grain size is less than 10mm grades and participates in dispensing as lateritic nickel ore raw material；By lateritic nickel ore, powder of returning mine, fuel and quick lime It is mixed to get mixture；S2, the mixture moisture is adjusted as 16wt%~18wt%, mixing granulation obtains sintering feed；S3, the sintering feed is layered on the bottom material top, is lighted a fire, is sintered to obtain heat sinter；S4, by the heat sinter cool down after, crushing and screening obtains finished product sinter.
- 2. according to the method described in claim 1, it is characterized in that, the fuel is anthracite.
- 3. according to the method described in claim 1, it is characterized in that, in the S1 steps, the quality percentage of the lateritic nickel ore Content is 51.5wt%~57wt%, the mass percentage of the powder of returning mine is 30wt%, the quality of fuel percentage composition is 7wt%~8.5wt%, the mass percentage of the quick lime is 6wt%~10wt%.
- 4. according to the method described in claim 1, it is characterized in that, in the S1 steps, the nickel of the low-grade discarded lump ore Grade is 0.8%~1.4%, and Iron grade is less than 20%；The thickness of the bottom material is 10mm~30mm.
- 5. according to the method described in claim 1, it is characterized in that, in the S2 steps, in the processes of mixing and granulating, mix Machine rotating speed 25rmin-1, pack completeness 15%, Granulation time 5min.
- 6. according to the method described in claim 1, it is characterized in that, in the S2 steps, the bed depth of the sintering feed is 680mm~800mm；It is 95 more than % that grain size, which is more than 0.5mm, in the sintering feed, and particle of the grain size more than 1mm is 80 % More than.
- 7. method according to any one of claim 1 to 6, which is characterized in that in the S3 steps, the ignition process In, firing temperature is 1100 ± 50 DEG C, and light a fire negative pressure 4kPa~6kPa, and the duration of ignition is 1.5min~2.5min.
- 8. method according to any one of claim 1 to 6, which is characterized in that in the S3 steps, described sintered Cheng Zhong, sintering high temperature band temperature be 1300 DEG C~1450 DEG C, sintering time be 20min~25min, sintering negative pressure be 9kPa~ 12kPa。
- 9. method according to any one of claim 1 to 6, which is characterized in that in the S4 steps, using jaw crushing Machine crushes the low-grade discarded lump ore, is sieved using vibration screen for mineral.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338100A (en) * | 2018-11-29 | 2019-02-15 | 武汉钢铁有限公司 | Make the grate-layer material whole grain method of grate-layer material based on pellet |
| CN111647739A (en) * | 2020-06-17 | 2020-09-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Utilization method of iron-containing resource |
| CN112961979A (en) * | 2021-01-27 | 2021-06-15 | 广东广青金属科技有限公司 | Method for comprehensively recovering waste lump ore in laterite-nickel ore |
| CN114540614A (en) * | 2022-01-19 | 2022-05-27 | 中南大学 | Method for sintering limonite type laterite-nickel ore pellets |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338100A (en) * | 2018-11-29 | 2019-02-15 | 武汉钢铁有限公司 | Make the grate-layer material whole grain method of grate-layer material based on pellet |
| CN111647739A (en) * | 2020-06-17 | 2020-09-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Utilization method of iron-containing resource |
| CN111647739B (en) * | 2020-06-17 | 2022-05-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Utilization method of iron-containing resource |
| CN112961979A (en) * | 2021-01-27 | 2021-06-15 | 广东广青金属科技有限公司 | Method for comprehensively recovering waste lump ore in laterite-nickel ore |
| CN114540614A (en) * | 2022-01-19 | 2022-05-27 | 中南大学 | Method for sintering limonite type laterite-nickel ore pellets |
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