CN107287415A - Strengthen compound additive of lateritic nickel ore briquetting and its preparation method and application - Google Patents
Strengthen compound additive of lateritic nickel ore briquetting and its preparation method and application Download PDFInfo
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- CN107287415A CN107287415A CN201710470955.7A CN201710470955A CN107287415A CN 107287415 A CN107287415 A CN 107287415A CN 201710470955 A CN201710470955 A CN 201710470955A CN 107287415 A CN107287415 A CN 107287415A
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- compound additive
- nickel ore
- lateritic nickel
- agglomerate
- briquetting
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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
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
- C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates
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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
- C22B1/2413—Binding; Briquetting ; Granulating enduration of pellets
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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
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
Abstract
The invention provides a kind of compound additive for being used to strengthen lateritic nickel ore briquetting and its preparation method and application, wherein compound additive includes 5wt%~10wt% waterglass, 50wt%~65wt% anthracite, 5%wt%~10wt% sodium humate and 10wt%~30wt% lime stone.Its preparation method for anthracite, sodium humate and lime stone are weighed by above-mentioned quality proportioning, mixture is uniformly mixed so as to obtain, after waterglass is individually incorporated.The compound additive of the present invention can significantly improve lateritic nickel ore briquetting yield rate and cold and hot intensity, can be applied to lateritic nickel ore briquetting.
Description
Technical field
The present invention relates to metallurgical and materials science field, it particularly relates to a kind of lateritic nickel ore briquetting of strengthening
Compound additive and its preparation method and application.
Background technology
Nickel is a kind of important strategy metal material, is currently used primarily in stainless steel production.The main source of metallic nickel is
Nickel sulfide ore and lateritic nickel ore, and based on the former.With caused by the exhaustive exploitation of global nickel sulfide ore, resource exhaustion is poor
Change, the center of gravity that nickel resources are developed gradually is offset to lateritic nickel ore.The handling process of lateritic nickel ore at home it is main with
Based on pyrogenic process, mainly including rotary kiln-electric furnace process（RKEF）, sintering-blast furnace process and rotary kiln for directly reducing-magnetic method, and
The less techniques of application such as-molten point oven process of shaft furnace-electric furnace process, rotary hearth furnace.For stable furnace condition and direct motion, thermal process pair
The cold machinery intensity and heat endurance for entering stove furnace charge have higher requirements.Wherein, freezing off for lateritic nickel ore agglomerate is formed for reinforcing
Enter one of effective way of stove furnace charge quality, mainly comprise the following steps：Using lateritic nickel ore as raw material, matching somebody with somebody as required by smelting process
Than, mechanical strength and shape size, the agglomerate with definite shape and intensity suppressed through mechanical pressurization is commonly applied to red
Native nickel minerals raw material enters stove pretreating process.In lateritic nickel ore briquetting technique, the development of additive is one of key technology, and it is straight
Connect and determine the indexs such as the cold and hot state intensity and heat endurance, reproducibility of agglomerate.And be used to strengthen laterite currently with additive
The research of nickel minerals pre-molding rarely has open report.
The briquetting additive currently developed is broadly divided into organic additive, inorganic additive and compound additive three major types.
The adhesive property of organic additive is good, has higher mechanical strength after lateritic nickel ore agglomerate dry solidification.But, due to having
Organic matter in machine additive is easily decomposed and burnt, loses cohesive force at high temperature, and the hot strength of agglomerate is typically poor.Use
Lateritic nickel ore agglomerate made from inorganic additive has higher mechanical strength, and hot strength is also higher.It has the disadvantage to increase
Non-flammable inorganic constituents is added, so as to increase the quantity of slag of later stage smelting.Compound additive is while using two kinds of different types
Additive, can mutually make up the deficiency that single additive is present, agglomerate is reached optimum efficiency.Composite additive is in recent years
Carry out the research direction of briquetting processing additive development.Therefore, a kind of compound additive for being used to strengthen lateritic nickel ore briquetting is developed
It is particularly important.
The problem of for described in correlation technique, effective solution is not yet proposed at present.
The content of the invention
For the above-mentioned technical problem in correlation technique, the present invention proposes that one kind is applied to lateritic nickel ore briquetting technique, and
The compound additive of lateritic nickel ore briquetting yield rate and cold and hot intensity can be significantly improved, with reasonable mixture ratio of components, production work
The advantage such as skill is simple.
To realize above-mentioned technical purpose, the technical proposal of the invention is realized in this way：
A kind of compound additive for being used to strengthen lateritic nickel ore briquetting, includes 5wt%~15wt% waterglass, 40wt%~65wt%
Anthracite, 5%wt%~20wt% sodium humate and 15wt%~30wt% lime stone.
As preferred embodiments of the present invention, above-mentioned compound additive, including 15wt% waterglass, 40wt% it is smokeless
The lime stone of coal, 20wt% sodium humate and 25wt%.
In above-mentioned compound additive component, the modulus of waterglass is 2.00~3.55, moisture be 40.0wt%~
49.5wt%, density is 1.297 kg m-3~1.418 kg m-3。
Above-mentioned compound additive, it is preferred that anthracitic granularity is 0.074mm~3mm.
Above-mentioned compound additive, it is preferred that sodium humate particle mean size is less than 0.074mm.
Above-mentioned compound additive, it is preferred that the granularity of lime stone is 0.074mm~3mm.
A kind of preparation method of above-mentioned compound additive, its step is：By anthracite, sodium humate and lime stone by above-mentioned
Quality proportioning weighed, obtaining after mixture of mixing, and waterglass is individually incorporated.
A kind of application of above-mentioned compound additive in reinforcing lateritic nickel ore briquetting.
Above-mentioned application, the application process is：
S1, lateritic nickel ore mixed with compound additive, add water and obtain mixture；Obtain red by the mixture is compressing
Native nickel minerals agglomerate.
The mass ratio of above-mentioned application, the lateritic nickel ore and the compound addition is 1: 0.15~0.3.
Above-mentioned application, it is described it is compressing during, pressure be 30MPa~60MPa.
Above-mentioned application, it is characterised in that further comprising the steps of：
S2, will after the lateritic nickel ore agglomerate drying and preheating enter rotary kiln in, add reduction coal, under reducing atmosphere carry out
Reduction obtains going back original product；
S3, by the reduzate of lateritic nickel ore pass through vertical cooling furnace, with nitrogen carry out heat exchange, the reduzate is cold
But；
S4, by the reduzate after cooling is broken, ore grinding and magnetic separation obtain high nickel ore concentrate.
Wherein, the S2 steps are specially：Agglomerate is dried, using rotary kiln hot exhaust gas to agglomerate preheat 850 DEG C~
950℃；Reduction coal is preheated to 700 DEG C~950 DEG C by nitrogen；
Above-mentioned application, it is preferred that in the S2 steps, the agglomerate after preheating enters in rotary kiln, according to C/Fe mass ratioes 0.5
~1.0 spray into reduction coal, under reducing atmosphere reduce obtaining going back original product.
Above-mentioned application, it is preferred that in the S2 steps, 1200 DEG C~1250 DEG C of reduction temperature, the recovery time is
30min~60min.
Above-mentioned application, it is preferred that in the S3 steps, the original product of going back is cooled to by nitrogen in vertical cooler
Less than 120 DEG C, the nitrogen is the cooling nitrogen after preheating reduction coal through heat exchange.
Above-mentioned application, it is preferred that in the S4 steps, by the reduzate after cooling through broken, after ore grinding, 90% with
Upper grain graininess is less than 0.074mm.
Compared with prior art, the advantage of the invention is that：
（1）The invention provides a kind of compound additive for being used to strengthen lateritic nickel ore briquetting, including waterglass, anthracite, corruption
Sodium phytate and lime stone.Wherein waterglass is inorganic binder, and sodium humate is organic additive, using anthracite as reducing agent,
Using lime stone as flux.It is complementary to one another between inorganic binder and organic binder bond, with stronger cementitiousness.It is simultaneously smokeless
Coal and limestone particle can improve the bulk density of compound additive, after briquetting, and support rib is played in lateritic nickel ore agglomerate
The effect of frame.Therefore, the collective effect of binding agent, reducing agent and flux, during lateritic nickel ore briquetting, can strengthen mineral
The cohesive force of intergranular, so that the ratio of briquetting of lateritic nickel ore briquetting and the mechanical strength of finished product agglomerate are improved, and in high temperature reduction
Firing stage reduces the explosion efflorescence of lateritic nickel ore agglomerate, and then meets the requirement of following process.Briquetting ratio of briquetting up to 82%,
Drop strength reaches 93%, and agglomerate compression strength reaches 130N/, and thermal explosion index is below 0.60%.
（2）It is used to strengthen in the compound additive of lateritic nickel ore briquetting, its component the invention provides a kind of, anthracite exists
As supplement reducing agent in lateritic nickel ore agglomerate reduction process, the circumgranular reducing atmosphere of lateritic nickel ore can be strengthened, promote nickel,
The reduction of ferriferous oxide, improves reduction efficiency.On the one hand lime stone decomposes in lateritic nickel ore agglomerate reduction early stage, the dioxy of generation
Change the formation that carbon external diffusion promotes agglomerate mesopore, the passage that increase reducing gas enters inside agglomerate is so as to promote reduction, separately
On the one hand play a part of to adjust basicity in follow-up fusion process, promote slag phase formation and slag sluicing system.
（3）The invention provides a kind of compound additive for being used to strengthen lateritic nickel ore briquetting, wherein anthracite and lime
The granularity of stone is that 0.074mm~3mm accounts for 80%~90%, and particle size distribution is wide, thick, fine grained and laterite nickel in additive
There is mechanical engagement effect in ore deposit particle, while coarse granule is played a supporting role inside agglomerate, so as to improve after being molded through briquetting
The mechanical strength of lateritic nickel ore briquetting finished product agglomerate.
（4）The invention provides a kind of preparation method for being used to strengthen the compound additive of lateritic nickel ore briquetting, with original
Expect wide material sources, the advantages of cost is low, preparation technology is simple, easily accomplish scale production.
（5）The invention provides a kind of application of compound additive during lateritic nickel ore briquetting, application process is simple,
It is easy to use.
Embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained, belongs to the scope of protection of the invention.
Material and instrument employed in following examples are commercially available, wherein, the modulus of waterglass is 2.00~3.55,
Moisture is 40wt%~49.5wt%, and density is 1.297 kg m-3~1.418 kg m-3.Anthracitic granularity be 0.074mm~
3mm.The granularity of sodium humate is less than 0.074mm.The granularity of lime stone is 0.074mm~3mm.
Embodiment 1
A kind of compound additive of the invention, including 64wt% anthracite, 20wt% lime stone, 8wt% sodium humate,
8wt% waterglass.
A kind of preparation method of the compound additive of the present embodiment, its preparation method is：By anthracite, sodium humate and stone
Lime stone weighed by above-mentioned quality proportioning, obtaining after mixture of mixing, and waterglass is individually incorporated.
A kind of application of the present embodiment compound additive in lateritic nickel ore briquetting, specific application process includes following step
Suddenly：
（1）By lateritic nickel ore and compound additive according to the ratio that mass ratio is 1: 0.25, in the mixer that rotating speed is 17r/min
Middle mixing 3 minutes.Then 8wt% water is added, continues to mix 3 minutes.
（2）Above-mentioned mixed material is put into in roller balling press magazine, it is compressing under 60MPa pressure, obtain
To lateritic nickel ore agglomerate.
The lateritic nickel ore agglomerate yield rate 80.60%, drop strength 89.33%, agglomerate compression strength 124 N/, thermal spalling
Index 0.57%.
（3）In raw nodulizing pre-heating system, agglomerate is preheated to 900 DEG C using hot nitrogen and obtains hot agglomerate.By hot agglomerate
Into rotary kiln, reduzate is then obtained with 1250 DEG C of reduction 40min in rotary kiln.Meanwhile, will in reduction process
It is preheated to 900 DEG C of reduction coal to spray into kiln according to C/Fe mass ratioes 0.8: 1, more than 1000 DEG C of thermal reduction block kiln discharge temperature.
（4）Reduzate is flowed into from the top of vertical cooling furnace, cooling nitrogen is introduced by external pressurized blower fan from bottom,
The nitrogen stream of rising and the reduced ore declined carry out heat exchange in shaft cooler, and hot nitrogen is led by top by discharge pipe
Go out, after inertial dust separator, may be used as cogeneration, preheating lateritic nickel ore nodulizing or as coal powder injection medium.Cold reduction
Product is discharged by discharging machine, upper blow-off valve and lower blow-off valve from bottom, and reduzate is cooled to 40 DEG C.Circulating fan is Roots
Blower fan, booster fan is using centrifugation booster fan.
（5）Cold reduzate ore grinding to granularity is accounted for more than 90% less than 0.074mm, is then 0.08T in magnetic field intensity
Under conditions of magnetic separation obtain iron nickel ore concentrate.Iron grade is 63.33%, iron recovery 64.72%, nickel grade 6.55%, and nickel recovery is
85.33%。
Embodiment 2
A kind of compound additive of the invention, including 64wt% anthracite, 20wt% lime stone, 8wt% sodium humate,
8wt% waterglass.
A kind of preparation method of the compound additive of the present embodiment, its preparation method is：By anthracite, sodium humate and stone
Lime stone weighed by above-mentioned quality proportioning, obtaining after mixture of mixing, and waterglass is individually incorporated.
A kind of application of the present embodiment compound additive in lateritic nickel ore briquetting, specific application process includes following step
Suddenly：
（1）By lateritic nickel ore and compound additive according to the ratio that mass ratio is 1: 0.20, in the mixer that rotating speed is 17r/min
Middle mixing 3 minutes.Then 8wt% water is added, continues to mix 3 minutes.
（2）Above-mentioned mixed material is put into in roller balling press magazine, with compressing under 60MPa pressure, obtaining
To lateritic nickel ore agglomerate；
The lateritic nickel ore agglomerate yield rate 79.82%, drop strength 85.96%, agglomerate compression strength 119 N/, thermal spalling index
0.51%。
（3）In raw nodulizing pre-heating system, agglomerate is preheated to 900 DEG C using hot nitrogen and obtains hot agglomerate.By hot agglomerate
Into rotary kiln, reduzate is then obtained with 1250 DEG C of reduction 40min in rotary kiln.Meanwhile, will in reduction process
It is preheated to 900 DEG C of reduction coal to spray into kiln according to C/Fe mass ratioes 0.8: 1, more than 1000 DEG C of thermal reduction block kiln discharge temperature.
（4）Reduzate is flowed into from the top of vertical cooling furnace, cooling nitrogen is introduced by external pressurized blower fan from bottom,
The nitrogen stream of rising and the reduced ore declined carry out heat exchange in shaft cooler, and hot nitrogen is led by top by discharge pipe
Go out, after inertial dust separator, may be used as cogeneration, preheating lateritic nickel ore nodulizing or as coal powder injection medium.Cold reduction
Product is discharged by discharging machine, upper blow-off valve and lower blow-off valve from bottom, and reduzate is cooled to 40 DEG C.Circulating fan is Roots
Blower fan, booster fan is using centrifugation booster fan.
（5）Cold reduzate ore grinding to granularity is accounted for more than 90% less than 0.074mm, is then 0.08T in magnetic field intensity
Under conditions of magnetic separation obtain ferronickel concentrate.Iron grade is 63.33%, iron recovery 64.72%, nickel grade 6.55%, and nickel recovery is
85.33%。
Embodiment 3
A kind of compound additive of the invention, including 64wt% anthracite, 20wt% lime stone, 8wt% sodium humate,
8wt% waterglass.
A kind of preparation method of the compound additive of the present embodiment, its preparation method is：By anthracite, sodium humate and stone
Lime stone weighed by above-mentioned quality proportioning, obtaining after mixture of mixing, and waterglass is individually incorporated.
A kind of application of the present embodiment compound additive in lateritic nickel ore briquetting, specific application process includes following step
Suddenly：
（1）By lateritic nickel ore and compound additive according to the ratio that mass ratio is 1: 0.30, in the mixer that rotating speed is 17r/min
Middle mixing 3 minutes.Then 8wt% water is added, continues to mix 3 minutes.
（2）Above-mentioned mixed material is put into in roller balling press magazine, with compressing under 60MPa pressure, obtaining
To lateritic nickel ore agglomerate；
The lateritic nickel ore agglomerate yield rate 81.53%, drop strength 89.96%, agglomerate compression strength 130 N/, thermal spalling index
0.69%。
（3）In raw nodulizing pre-heating system, agglomerate is preheated to 900 DEG C using hot nitrogen and obtains hot agglomerate.By hot agglomerate
Into rotary kiln, reduzate is then obtained with 1250 DEG C of reduction 40min in rotary kiln.Meanwhile, will in reduction process
It is preheated to 900 DEG C of reduction coal to spray into kiln according to C/Fe mass ratioes 0.8: 1, more than 1000 DEG C of thermal reduction block kiln discharge temperature.
（4）Reduzate is flowed into from the top of vertical cooling furnace, cooling nitrogen is introduced by external pressurized blower fan from bottom,
The nitrogen stream of rising and the reduced ore declined carry out heat exchange in shaft cooler, and hot nitrogen is led by top by discharge pipe
Go out, after inertial dust separator, may be used as cogeneration, preheating lateritic nickel ore nodulizing or as coal powder injection medium.Cold reduction
Product is discharged by discharging machine, upper blow-off valve and lower blow-off valve from bottom, and reduzate is cooled to 40 DEG C.Circulating fan is Roots
Blower fan, booster fan is using centrifugation booster fan.
（5）Cold reduzate ore grinding to granularity is accounted for more than 90% less than 0.074mm-, it is then 0.08T in magnetic field intensity
Under conditions of magnetic separation obtain ferronickel concentrate.Iron grade is 63.33%, iron recovery 64.72%, nickel grade 6.55%, and nickel recovery is
85.33%。
It was found from the result of embodiment 1 to 3, compound additive composition is consistent, different lateritic nickel ore and compound additive
Mass ratio, drop strength, agglomerate compression strength and the thermal spalling index of its lateritic nickel ore agglomerate have significant difference, with compound
The ratio increase of additive, drop strength, agglomerate compression strength and thermal spalling index gradually strengthen.
Embodiment 4
A kind of compound additive of the invention, including 54wt% anthracite, 30wt% lime stone, 8wt% sodium humate,
8wt% waterglass.
A kind of preparation method of the compound additive of the present embodiment, its preparation method is：By anthracite, sodium humate and stone
Lime stone weighed by above-mentioned quality proportioning, obtaining after mixture of mixing, and waterglass is individually incorporated.
A kind of application of the present embodiment compound additive in lateritic nickel ore briquetting, specific application process includes following step
Suddenly：
（1）By lateritic nickel ore and compound additive according to the ratio that mass ratio is 1: 0.25, in the mixer that rotating speed is 17r/min
Middle mixing 3 minutes.Then 8wt% water is added, continues to mix 3 minutes.
（2）Above-mentioned mixed material is put into in roller balling press magazine, with compressing under 60MPa pressure, obtaining
To lateritic nickel ore agglomerate；
The lateritic nickel ore agglomerate yield rate 80.20%, drop strength 88.78%, agglomerate compression strength 120N/, thermal spalling index
0.55%。
（3）In raw nodulizing pre-heating system, agglomerate is preheated to 900 DEG C using hot nitrogen and obtains hot agglomerate.By hot agglomerate
Into rotary kiln, reduzate is then obtained with 1250 DEG C of reduction 40min in rotary kiln.Meanwhile, will in reduction process
It is preheated to 900 DEG C of reduction coal to spray into kiln according to C/Fe mass ratioes 0.8: 1, more than 1000 DEG C of thermal reduction block kiln discharge temperature.
（4）Reduzate is flowed into from the top of vertical cooling furnace, cooling nitrogen is introduced by external pressurized blower fan from bottom,
The nitrogen stream of rising and the reduced ore declined carry out heat exchange in shaft cooler, and hot nitrogen is led by top by discharge pipe
Go out, after inertial dust separator, may be used as cogeneration, preheating lateritic nickel ore nodulizing or as coal powder injection medium.Cold reduction
Product is discharged by discharging machine, upper blow-off valve and lower blow-off valve from bottom, and reduzate is cooled to 40 DEG C.Circulating fan is Roots
Blower fan, booster fan is using centrifugation booster fan.
（5）Cold reduzate ore grinding to granularity is accounted for more than 90% less than 0.074mm, is then 0.08T in magnetic field intensity
Under conditions of magnetic separation obtain ferronickel concentrate.Iron grade is 63.33%, iron recovery 64.72%, nickel grade 6.55%, and nickel recovery is
85.33%。
Embodiment 5
A kind of compound additive of the invention, including 59wt% anthracite, 18wt% lime stone, 15wt% sodium humate,
8wt% waterglass.
A kind of preparation method of the compound additive of the present embodiment, its preparation method is：By anthracite, sodium humate and stone
Lime stone weighed by above-mentioned quality proportioning, obtaining after mixture of mixing, and waterglass is individually incorporated.
A kind of application of the present embodiment compound additive in lateritic nickel ore briquetting, specific application process is：
（1）By lateritic nickel ore and compound additive according to the ratio that mass ratio is 1: 0.25, in the mixer that rotating speed is 17r/min
Middle mixing 3 minutes.Then 8wt% water is added, continues to mix 3 minutes.
（2）Above-mentioned mixed material is put into in roller balling press magazine, with compressing under 60MPa pressure, obtaining
To lateritic nickel ore agglomerate；
The lateritic nickel ore agglomerate yield rate 81.06%, drop strength 90.08%, agglomerate compression strength 131 N/, thermal spalling index
0.35%。
（3）In raw nodulizing pre-heating system, agglomerate is preheated to 900 DEG C using hot nitrogen and obtains hot agglomerate.By hot agglomerate
Into rotary kiln, reduzate is then obtained with 1250 DEG C of reduction 40min in rotary kiln.Meanwhile, will in reduction process
It is preheated to 900 DEG C of reduction coal to spray into kiln according to C/Fe mass ratioes 0.8: 1, more than 1000 DEG C of thermal reduction block kiln discharge temperature.
（4）Reduzate is flowed into from the top of vertical cooling furnace, cooling nitrogen is introduced by external pressurized blower fan from bottom,
The nitrogen stream of rising and the reduced ore declined carry out heat exchange in shaft cooler, and hot nitrogen is led by top by discharge pipe
Go out, after inertial dust separator, may be used as cogeneration, preheating lateritic nickel ore nodulizing or as coal powder injection medium.Cold reduction
Product is discharged by discharging machine, upper blow-off valve and lower blow-off valve from bottom, and reduzate is cooled to 40 DEG C.Circulating fan is Roots
Blower fan, booster fan is using centrifugation booster fan.
（5）Cold reduzate ore grinding to granularity is accounted for more than 90% less than 0.074mm, is then 0.08T in magnetic field intensity
Under conditions of magnetic separation obtain ferronickel concentrate.Iron grade is 63.33%, iron recovery 64.72%, nickel grade 6.55%, and nickel recovery is
85.33%。
Embodiment 6
A kind of compound additive of the invention, including 59wt% anthracite, 18wt% lime stone, 8wt% sodium humate,
15wt% waterglass.
A kind of preparation method of the compound additive of the present embodiment, its preparation method is：By anthracite, sodium humate and stone
Lime stone weighed by above-mentioned quality proportioning, obtaining after mixture of mixing, and waterglass is individually incorporated.
A kind of application of the present embodiment compound additive in lateritic nickel ore briquetting, specific application process includes following step
Suddenly：
（1）By lateritic nickel ore and compound additive according to the ratio that mass ratio is 1: 0.25, in the mixer that rotating speed is 17r/min
Middle mixing 3 minutes.Then 8wt% water is added, continues to mix 3 minutes.
（2）Above-mentioned mixed material is put into in roller balling press magazine, with compressing under 60MPa pressure, obtaining
To lateritic nickel ore agglomerate；
The lateritic nickel ore agglomerate yield rate 80.72%, drop strength 89.55%, agglomerate compression strength 128 N/, thermal spalling index
0.56%。
（3）In raw nodulizing pre-heating system, agglomerate is preheated to 900 DEG C using hot nitrogen and obtains hot agglomerate.By hot agglomerate
Into rotary kiln, reduzate is then obtained with 1250 DEG C of reduction 40min in rotary kiln.Meanwhile, will in reduction process
It is preheated to 900 DEG C of reduction coal to spray into kiln according to C/Fe mass ratioes 0.8: 1, more than 1000 DEG C of thermal reduction block kiln discharge temperature.
（4）Reduzate is flowed into from the top of vertical cooling furnace, cooling nitrogen is introduced by external pressurized blower fan from bottom,
The nitrogen stream of rising and the reduced ore declined carry out heat exchange in shaft cooler, and hot nitrogen is led by top by discharge pipe
Go out, after inertial dust separator, may be used as cogeneration, preheating lateritic nickel ore nodulizing or as coal powder injection medium.Cold reduction
Product is discharged by discharging machine, upper blow-off valve and lower blow-off valve from bottom, and reduzate is cooled to 40 DEG C.Circulating fan is Roots
Blower fan, booster fan is using centrifugation booster fan.
（5）By cold reduzate ore grinding to accounting for more than 90% less than 0.074mm, then in the bar that magnetic field intensity is 0.08T
Magnetic separation obtains iron powder and nickel powder under part.Iron grade is 63.33%, iron recovery 64.72%, nickel grade 6.55%, and nickel recovery is
85.33%。
Embodiment 7
A kind of compound additive of the invention, including 40wt% anthracite, 25wt% lime stone, 20wt% sodium humate,
15wt% waterglass.
A kind of preparation method of the compound additive of the present embodiment, its preparation method is：By anthracite, sodium humate and stone
Lime stone weighed by above-mentioned quality proportioning, obtaining after mixture of mixing, and waterglass is individually incorporated.
A kind of application of the present embodiment compound additive in lateritic nickel ore briquetting, specific application process includes following step
Suddenly：
（1）By lateritic nickel ore and compound additive according to the ratio that mass ratio is 1: 0.20, in the mixer that rotating speed is 17r/min
Middle mixing 3 minutes.Then 8wt% water is added, continues to mix 3 minutes.
（2）Above-mentioned mixed material is put into in roller balling press magazine, with compressing under 60MPa pressure, obtaining
To lateritic nickel ore agglomerate；
The lateritic nickel ore agglomerate yield rate 82.06%, drop strength 93.00%, agglomerate compression strength 130 N/, thermal spalling index
0.60%。
（3）In raw nodulizing pre-heating system, agglomerate is preheated to 900 DEG C using hot nitrogen and obtains hot agglomerate.By hot agglomerate
Into rotary kiln, reduzate is then obtained with 1250 DEG C of reduction 40min in rotary kiln.Meanwhile, will in reduction process
It is preheated to 900 DEG C of reduction coal to spray into kiln according to C/Fe mass ratioes 0.8: 1, more than 1000 DEG C of thermal reduction block kiln discharge temperature.
（4）Reduzate is flowed into from the top of vertical cooling furnace, cooling nitrogen is introduced by external pressurized blower fan from bottom,
The nitrogen stream of rising and the reduced ore declined carry out heat exchange in shaft cooler, and hot nitrogen is led by top by discharge pipe
Go out, after inertial dust separator, may be used as cogeneration, preheating lateritic nickel ore nodulizing or as coal powder injection medium.Cold reduction
Product is discharged by discharging machine, upper blow-off valve and lower blow-off valve from bottom, and reduzate is cooled to 40 DEG C.Circulating fan is Roots
Blower fan, booster fan is using centrifugation booster fan.
（5）Cold reduzate ore grinding to granularity is accounted for more than 90% less than 0.074mm-, it is then 0.08T in magnetic field intensity
Under conditions of magnetic separation obtain ferronickel concentrate.Iron grade is 63.33%, iron recovery 64.72%, nickel grade 6.55%, and nickel recovery is
85.33%。
Comparative example 1
According to the method for embodiment 1, difference is, without compound additive, lateritic nickel ore agglomerate yield rate 77.77%, to fall
Intensity 78.65%, agglomerate compression strength 107 N/, thermal spalling index 1.35%.
Comparative example 2
According to the method for embodiment 7, difference is without compound additive, individually addition 4wt% sodium humate, 3wt%
Waterglass, lateritic nickel ore agglomerate yield rate 79.80%, drop strength 82.65%, agglomerate compression strength 118 N/, thermal spalling refers to
Number 1.68%.
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
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
1. a kind of compound additive for being used to strengthen lateritic nickel ore briquetting, it is characterised in that the water glass including 5wt%~15wt%
Glass, 40wt%~65wt% anthracite, 5%wt%~20wt% sodium humate and 15wt%~30wt% lime stone.
2. compound additive according to claim 1, it is characterised in that the modulus of the waterglass is 2.00~3.55,
Moisture is 40.0wt%~49.5wt%, and density is 1.297 kg m-3~1.418 kg m-3。
3. compound additive according to claim 1, it is characterised in that anthracite particle mean size is 0.074mm~3mm.
4. compound additive according to claim 1, it is characterised in that the granularity of sodium humate is less than 0.074mm.
5. compound additive according to claim 1, it is characterised in that limestone granularity is 0.074mm~3mm.
6. the preparation method of compound additive any one of a kind of claim 1 to 5, it is characterised in that by anthracite, corruption
Sodium phytate and lime stone weighed by above-mentioned quality proportioning, obtaining after mixture of mixing, and waterglass is individually incorporated.
7. a kind of a kind of application of the compound additive any one of claim 1 to 5 in reinforcing lateritic nickel ore briquetting.
8. application according to claim 7, it is characterised in that the application process is by lateritic nickel ore and compound additive
It is sufficiently mixed, it is compressing after addition water to obtain lateritic nickel ore agglomerate.
9. application according to claim 8, it is characterised in that the lateritic nickel ore and the mass ratio of the compound addition are
1: 0.15~0.3.
10. application according to claim 8, it is characterised in that it is described it is compressing during, pressure be 30MPa~
60MPa。
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967570A (en) * | 2010-10-11 | 2011-02-09 | 大同市和合新能源科技有限责任公司 | Method for producing ferro-nickel alloy from red soil nickel ore |
| CN103290206A (en) * | 2013-06-14 | 2013-09-11 | 中南大学 | Efficient composite additive for separating iron and aluminium from red mud and application |
| CN103409629A (en) * | 2013-07-10 | 2013-11-27 | 中国恩菲工程技术有限公司 | Laterite gas base reduction method |
| CN104451148A (en) * | 2014-12-01 | 2015-03-25 | 偏关县晋电化工有限责任公司 | Production technology for smelting ferronickel from laterite-nickel ore |
| 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 |
| CN106702177A (en) * | 2017-01-23 | 2017-05-24 | 宝钢德盛不锈钢有限公司 | Technology of direct reduction of nickel-iron particles from laterite-nickel ores in rotary kiln |
-
2017
- 2017-06-20 CN CN201710470955.7A patent/CN107287415B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967570A (en) * | 2010-10-11 | 2011-02-09 | 大同市和合新能源科技有限责任公司 | Method for producing ferro-nickel alloy from red soil nickel ore |
| CN103290206A (en) * | 2013-06-14 | 2013-09-11 | 中南大学 | Efficient composite additive for separating iron and aluminium from red mud and application |
| CN103409629A (en) * | 2013-07-10 | 2013-11-27 | 中国恩菲工程技术有限公司 | Laterite gas base reduction method |
| CN104451148A (en) * | 2014-12-01 | 2015-03-25 | 偏关县晋电化工有限责任公司 | Production technology for smelting ferronickel from laterite-nickel ore |
| 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 |
| CN106702177A (en) * | 2017-01-23 | 2017-05-24 | 宝钢德盛不锈钢有限公司 | Technology of direct reduction of nickel-iron particles from laterite-nickel ores in rotary kiln |
Non-Patent Citations (1)
| Title |
|---|
| 戴维: "《铁合金工程技术》", 31 August 2015 * |
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