CN105838874A - Method for preparing laterite-nickel ore pellets for shaft furnace - Google Patents
Method for preparing laterite-nickel ore pellets for shaft furnace Download PDFInfo
- Publication number
- CN105838874A CN105838874A CN201610341625.3A CN201610341625A CN105838874A CN 105838874 A CN105838874 A CN 105838874A CN 201610341625 A CN201610341625 A CN 201610341625A CN 105838874 A CN105838874 A CN 105838874A
- Authority
- CN
- China
- Prior art keywords
- nickel ore
- pelletizing
- binding agent
- lateritic nickel
- laterite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a method for preparing laterite-nickel ore pellets for a shaft furnace. The method includes the steps that firstly, laterite-nickel ore, water, calcium oxide and an adhesive are mixed to obtain a mixed material; secondly, the mixed material is subjected to forming processing to obtain formed pellets; thirdly, the formed pellets are dried to obtain dried pellets; and fourthly, the dried pellets are roasted to obtain the laterite-nickel ore pellets, wherein laterite-nickel ore, water, calcium oxide and the adhesive are mixed according to the mass ratio of 100:(5-30):(5-30):(2-20). The laterite-nickel ore pellets prepared through the method are good in strength, the average compressive strength of the laterite-nickel ore pellets obtained after roasting reaches 2000 N or above, the average fall strength reaches 15 times or above, and accordingly the requirement of the shaft furnace for the pellets is met.
Description
Technical field
The invention belongs to the preparation method of a kind of shaft furnace lateritic nickel ore pelletizing.
Background technology
In recent years, along with gradually decreasing of nickel sulfide ore resource and high-grade lateritic nickel ore resource, a large amount of nickel grades are left at 1-2%
The exploitation of right lateritic nickel ore is the most concerned.Lateritic nickel ore pelletizing moisture is high, at about 35-40%, commonly
The pellet strength prepared of forming method relatively low, pulverization rate is higher, does not reaches the shaft furnace requirement to pellet strength；It addition, it is red
Soil nickel minerals is big because of scaling loss, and metal content content is low, if direct levigate production pellet, its intensity is the lowest, perpendicular far from meeting
The requirement of stove.
Therefore can develop make new advances meet pellet binder and the technique that shaft furnace requires, lateritic nickel ore pellet roasting is become intensity
High and the cheap movement requirement of preparation cost can be met, will have the meaning of reality.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the one of the present invention
Purpose is to propose the preparation method of a kind of shaft furnace lateritic nickel ore pelletizing, uses the lateritic nickel ore pelletizing that the method prepares
Intensity is preferable, and after roasting, the mean compressive strength of gained lateritic nickel ore pelletizing reaches more than 2000N, average fall strength of briquette
Reach more than 15 times, thus meet the shaft furnace needs to pelletizing.
In one aspect of the invention, the present invention proposes the preparation method of a kind of shaft furnace lateritic nickel ore pelletizing.According to this
Bright embodiment, the method includes:
(1) lateritic nickel ore is mixed with water, calcium oxide and binding agent, in order to obtain mixed material；
(2) it is shaped described mixed material processing, in order to obtain molding pelletizing；
(3) described molding pelletizing is carried out drying and processing, in order to obtain drying pelletizing；And
(4) described drying pelletizing is carried out calcination process, in order to obtain lateritic nickel ore pelletizing,
Wherein, it is 100:(5～30 by described lateritic nickel ore and described water, described calcium oxide and described binding agent according to mass ratio):
(5～30): (2～20) mix.
Thus, can to prepare Mean Crush strong for the preparation method of shaft furnace lateritic nickel ore pelletizing according to embodiments of the present invention
Degree reaches more than 2000N, and average fall strength of briquette reaches the lateritic nickel ore pelletizing of more than 15 times, thus meets shaft furnace to pelletizing
Needs.
It addition, the preparation method of shaft furnace lateritic nickel ore pelletizing according to the above embodiment of the present invention can also have following additional
Technical characteristic:
In some embodiments of the invention, in step (1), by described lateritic nickel ore and described water, described calcium oxide and
Described binding agent is 100:(10～25 according to mass ratio): (10～20): (5～15) mix.Thus, it is possible to significantly carry
The comprcssive strength of high lateritic nickel ore pelletizing and fall strength of briquette.
In some embodiments of the invention, in step (1), described binding agent is in bentonite and modified starch
At least one.Thus, by using such binding agent can effectively control the addition of inorganic constituents in pelletizing, thus avoid
Inorganic impurity is brought into pelletizing.
In some embodiments of the invention, in step (1), described binding agent is answering containing bentonite and modified starch
Close binding agent, and in described compound binding agent, described bentonite is (2～5) with the mass ratio of described modified starch: 1.
Thus, it is possible to reduce the impurity content in pelletizing while the comprcssive strength improving lateritic nickel ore pelletizing and fall strength of briquette.
In some embodiments of the invention, in step (1), the particle diameter of described lateritic nickel ore is not higher than 150 microns.By
This, can improve comprcssive strength and the fall strength of briquette of lateritic nickel ore pelletizing further.
In some embodiments of the invention, in step (2), the pressure of described forming processes is 11～13MPa.Thus,
Comprcssive strength and the fall strength of briquette of lateritic nickel ore pelletizing can be improved further.
In some embodiments of the invention, in step (3), the temperature of described drying and processing is 80～100 degrees Celsius,
Time is 10～16 hours.Thus, it is possible to the cold conditions comprcssive strength making gained dry pelletizing reaches more than 250N, fall
Intensity reaches more than 10 times, thus improves comprcssive strength and the fall strength of briquette of gained lateritic nickel ore pelletizing further.
In some embodiments of the invention, in step (4), the temperature of described calcination process is not less than 1200 degrees Celsius.
Thus, it is possible to improve comprcssive strength and the fall strength of briquette of lateritic nickel ore pelletizing further.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become bright from the following description
Aobvious, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage will be apparent from from combining the accompanying drawings below description to embodiment
With easy to understand, wherein:
Fig. 1 is the preparation method schematic flow sheet of shaft furnace lateritic nickel ore pelletizing according to an embodiment of the invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
In one aspect of the invention, the present invention proposes the preparation method of a kind of shaft furnace lateritic nickel ore pelletizing.According to this
Bright embodiment, the method includes: lateritic nickel ore is mixed by (1) with water, calcium oxide and binding agent, in order to mixed
Compound material；(2) it is shaped described mixed material processing, in order to obtain molding pelletizing；(3) described molding pelletizing is entered
Row drying and processing, in order to obtain drying pelletizing；And described drying pelletizing is carried out calcination process by (4), in order to obtain laterite
Nickel ore pellet, wherein, is 100 by described lateritic nickel ore and described water, described calcium oxide and described binding agent according to mass ratio:
(5～30): (5～30): (2～20) mix.Inventor finds, lateritic nickel ore self has higher viscosity, molding
Process is difficult to carry out, and can be effectively improved the tough defect of lateritic nickel ore by adding calcium oxide, thus beneficially molding pelletizing
The demoulding, and the calcium oxide added can use as slag former during subsequent smelting, thus improves in smelting process
The grade of metallic nickel, the application by carrying out drying and processing by gained molding pelletizing simultaneously, and gained dries the cold conditions resistance to compression of pelletizing
Intensity reaches more than 250N, and fall strength of briquette reaches more than 10 times, so that gained lateritic nickel ore ball after follow-up fired process
The mean compressive strength of group reaches more than 2000N, and average fall strength of briquette reaches more than 15 times, meets the shaft furnace need to pelletizing
Want.
Below with reference to Fig. 1, the preparation method of the shaft furnace lateritic nickel ore pelletizing of the embodiment of the present invention is described in detail.According to
Embodiments of the invention, the method includes:
S100: lateritic nickel ore is mixed with water, calcium oxide and binding agent
According to embodiments of the invention, lateritic nickel ore is mixed with water, calcium oxide and binding agent, such that it is able to mixed
Compound material.Inventor finds, lateritic nickel ore self has higher viscosity, and forming process is difficult to carry out, and is aoxidized by addition
Calcium can be effectively improved the tough defect of lateritic nickel ore, thus the demoulding of beneficially molding pelletizing, and the calcium oxide added exists
Can use as slag former during subsequent smelting, thus improve the grade of metallic nickel in smelting process.
According to one embodiment of present invention, can be 100 according to mass ratio by lateritic nickel ore and water, calcium oxide and binding agent:
(5～30): (5～30): (2～20) mix.Inventor is had been surprisingly found that by great many of experiments, mixes according to this mixed proportion
Close and can ensure that gained pelletizing has higher comprcssive strength and fall strength of briquette.
According to a particular embodiment of the invention, can be 100 according to mass ratio by lateritic nickel ore and water, calcium oxide and binding agent:
(10～25): (10～20): (5～15) mix.Inventor finds, gained lateritic nickel ore pelletizing under this mixing match
Comprcssive strength and fall strength of briquette are optimal.
According to still a further embodiment, the particular type of binding agent is not particularly restricted, and those skilled in the art can
To select according to actual needs, according to a particular embodiment of the invention, binding agent can be selected from bentonite and modified shallow lake
At least one in powder, preferably comprises the compound binding agent of bentonite and modified starch.Inventor finds, such binding agent valency
Lattice are cheap, wide material sources, and are organo-mineral complexing binding agent, can effectively control in gained lateritic nickel ore pelletizing inorganic
The addition of composition, thus reduce the content of inorganic impurity in pelletizing.
According to a particular embodiment of the invention, in this compound binding agent, the ratio of bentonite and modified starch is not particularly restricted,
Those skilled in the art can select according to actual needs, according to a particular embodiment of the invention, in this compound binding agent,
Bentonite can be (2～5) with the mass ratio of modified starch: 1.Inventor finds, the compound binding agent using this composition is permissible
Ensure that gained pelletizing just has higher resistance to compression and drop resistant performance.
According to still another embodiment of the invention, the particle diameter of lateritic nickel ore is not particularly restricted, and those skilled in the art are permissible
Selecting according to actual needs, according to a particular embodiment of the invention, the particle diameter of lateritic nickel ore can be not higher than 150 microns.
Inventor finds, the lateritic nickel ore of this particle size range can be sufficiently mixed with binding agent and calcium oxide, such that it is able to significantly improve
The comprcssive strength of gained lateritic nickel ore pelletizing and fall strength of briquette.
S200: be shaped mixed material processing
According to embodiments of the invention, it is shaped above-mentioned gained mixed material processing, such that it is able to obtain molding pelletizing.
Concrete, obtain molding pelletizing by above-mentioned gained mixed material supply to former is pressed.
According to one embodiment of present invention, forming processes pressure is not particularly restricted, and those skilled in the art can basis
Being actually needed and select, according to a particular embodiment of the invention, the pressure of forming processes can be 11～13MPa.Thus,
Comprcssive strength and the fall strength of briquette of follow-up gained lateritic nickel ore pelletizing can be significantly improved.
S300: molding pelletizing is carried out drying and processing
According to embodiments of the invention, above-mentioned gained molding pelletizing is carried out drying and processing, such that it is able to obtain drying pelletizing.
Inventor finds, by gained molding pelletizing carries out drying and processing, gained is dried the cold conditions comprcssive strength of pelletizing and reached 250N
Above, fall strength of briquette reaches more than 10 times, so that the Mean Crush of gained lateritic nickel ore pelletizing is strong after follow-up fired process
Degree reaches more than 2000N, and average fall strength of briquette reaches more than 15 times, meets the shaft furnace needs to pelletizing.
According to one embodiment of present invention, the condition of drying and processing is not particularly restricted, and those skilled in the art can root
Selecting according to being actually needed, according to a particular embodiment of the invention, the temperature of drying and processing can be 80～100 degrees Celsius,
Time can be 10～16 hours.Thus, it is possible to ensure that the cold conditions comprcssive strength of gained drying pelletizing reaches more than 250N,
Fall strength of briquette reaches more than 10 times, thus improves comprcssive strength and the fall strength of briquette of gained lateritic nickel ore pelletizing further.
S400: drying pelletizing is carried out calcination process
According to embodiments of the invention, above-mentioned gained drying pelletizing is carried out calcination process, such that it is able to obtain lateritic nickel ore ball
Group.Inventor finds, carries out calcination process by gained is dried pelletizing, so that the Mean Crush of gained lateritic nickel ore
Intensity reaches more than 2000N, and average fall strength of briquette reaches the lateritic nickel ore pelletizing of more than 15 times, thus meets shaft furnace to ball
The needs of group.
According to one embodiment of present invention, the condition of calcination process is not particularly restricted, and those skilled in the art can
To select according to actual needs, according to a particular embodiment of the invention, calcination process can be taken the photograph being not less than 1200
Carry out under family name's degree.Thus, it is possible to ensure to make the mean compressive strength of gained lateritic nickel ore reach more than 2000N, averagely
Fall strength of briquette reaches the lateritic nickel ore pelletizing of more than 15 times, thus meets the shaft furnace needs to pelletizing.
The preparation method of shaft furnace lateritic nickel ore pelletizing according to embodiments of the present invention can be effectively improved red by adding calcium oxide
The defect that soil nickel minerals intrinsic viscosity is big and causes molding difficulty is big, thus the demoulding of beneficially molding pelletizing, and the oxygen added
Change calcium to use as slag former during subsequent smelting, thus improve the grade of metallic nickel in smelting process, the most originally
The binding agent used in application is cheap, wide material sources, and is organo-mineral complexing binding agent, can effectively control institute
Obtaining the addition of inorganic constituents in lateritic nickel ore pelletizing, thus reduce the content of inorganic impurity in pelletizing, additionally the application passes through
Gained molding pelletizing carries out drying and processing, and gained is dried the cold conditions comprcssive strength of pelletizing and is reached more than 250N, fall strength of briquette
Reach more than 10 times, so that the mean compressive strength of gained lateritic nickel ore pelletizing reaches 2000N after follow-up fired process
Above, average fall strength of briquette reaches more than 15 times, meets the shaft furnace needs to pelletizing.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are the most descriptive
, and limit the present invention never in any form.
Embodiment 1
First by levigate for lateritic nickel ore to being smaller in size than 150 microns, a certain amount of moisture and calcium oxide powder then it are added thereto to
End, (binding agent is the compound binding agent containing bentonite and modified starch, wherein, swollen to be subsequently added a certain amount of binding agent
The mass ratio of profit soil and modified starch is 2:1), wherein moisture accounts for the 5% of lateritic nickel ore quality, and lime powder accounts for laterite nickel
The 30% of mineral nitrogen amount, binding agent quality accounts for the 2% of lateritic nickel ore quality, and said mixture uniformly mixes 10 minutes；
Putting into roller ball press compressing by the material mixed subsequently, ball press pressure is set as 11MPa；The ball of preparation molding
Group puts in the baking oven that temperature is 80 DEG C dries 16 hours；Gained is then dried pelletizing roasting at 1200 DEG C process,
Obtain lateritic nickel ore pelletizing.
Embodiment 2
First by levigate for lateritic nickel ore to being smaller in size than 150 microns, a certain amount of moisture and calcium oxide powder then it are added thereto to
End, (binding agent is the compound binding agent containing bentonite and modified starch, wherein, swollen to be subsequently added a certain amount of binding agent
The mass ratio of profit soil and modified starch is 5:1), wherein moisture accounts for the 30% of lateritic nickel ore quality, and lime powder accounts for laterite
The 15% of nickel minerals quality, binding agent quality accounts for the 20% of lateritic nickel ore quality, and said mixture uniformly mixes 10 minutes；
Putting into roller ball press compressing by the material mixed subsequently, ball press pressure is set as 13MPa；The ball of preparation molding
Group puts in the baking oven that temperature is 100 DEG C dries 10 hours；Gained is then dried pelletizing roasting at 1200 DEG C process,
Obtain lateritic nickel ore pelletizing.
Embodiment 3
First by levigate for lateritic nickel ore to being smaller in size than 150 microns, a certain amount of moisture and calcium oxide powder then it are added thereto to
End, (binding agent is the compound binding agent containing bentonite and modified starch, wherein, swollen to be subsequently added a certain amount of binding agent
The mass ratio of profit soil and modified starch is 3:1), wherein moisture accounts for the 10% of lateritic nickel ore quality, and lime powder accounts for laterite
The 10% of nickel minerals quality, binding agent quality accounts for the 5% of lateritic nickel ore quality, and said mixture uniformly mixes 10 minutes；
Putting into roller ball press compressing by the material mixed subsequently, ball press pressure is set as 12MPa；The ball of preparation molding
Group puts in the baking oven that temperature is 90 DEG C dries 13 hours；Gained is then dried pelletizing roasting at 1200 DEG C process,
Obtain lateritic nickel ore pelletizing.
Embodiment 4
First by levigate for lateritic nickel ore to being smaller in size than 150 microns, a certain amount of moisture and calcium oxide powder then it are added thereto to
End, (binding agent is the compound binding agent containing bentonite and modified starch, wherein, swollen to be subsequently added a certain amount of binding agent
The mass ratio of profit soil and modified starch is 4:1), wherein moisture accounts for the 25% of lateritic nickel ore quality, and lime powder accounts for laterite
The 20% of nickel minerals quality, binding agent quality accounts for the 15% of lateritic nickel ore quality, and said mixture uniformly mixes 10 minutes；
Putting into roller ball press compressing by the material mixed subsequently, ball press pressure is set as 12MPa；The ball of preparation molding
Group puts in the baking oven that temperature is 90 DEG C dries 14 hours；Gained is then dried pelletizing roasting at 1200 DEG C process,
Obtain lateritic nickel ore pelletizing.
Embodiment 5
First by levigate for lateritic nickel ore to being smaller in size than 150 microns, a certain amount of moisture and calcium oxide powder then it are added thereto to
End, (binding agent is the compound binding agent containing bentonite and modified starch, wherein, swollen to be subsequently added a certain amount of binding agent
The mass ratio of profit soil and modified starch is 3:1), wherein moisture accounts for the 17% of lateritic nickel ore quality, and lime powder accounts for laterite
The 15% of nickel minerals quality, binding agent quality accounts for the 10% of lateritic nickel ore quality, and said mixture uniformly mixes 10 minutes；
Putting into roller ball press compressing by the material mixed subsequently, ball press pressure is set as 12MPa；The ball of preparation molding
Group puts in the baking oven that temperature is 90 DEG C dries 14 hours；Gained is then dried pelletizing roasting at 1200 DEG C process,
Obtain lateritic nickel ore pelletizing.
Comparative example 1
First by levigate for lateritic nickel ore to being smaller in size than 150 microns, a certain amount of moisture and calcium oxide powder then it are added thereto to
End, (binding agent is the compound binding agent containing bentonite and modified starch, wherein, swollen to be subsequently added a certain amount of binding agent
The mass ratio of profit soil and modified starch is 1:1), wherein moisture accounts for the 17% of lateritic nickel ore quality, and lime powder accounts for laterite
The 15% of nickel minerals quality, binding agent quality accounts for the 10% of lateritic nickel ore quality, and said mixture uniformly mixes 10 minutes；
Putting into roller ball press compressing by the material mixed subsequently, ball press pressure is set as 12MPa；The ball of preparation molding
Group puts in the baking oven that temperature is 90 DEG C dries 14 hours；Gained is then dried pelletizing roasting at 1200 DEG C process,
Obtain lateritic nickel ore pelletizing.
Comparative example 2
First by levigate for lateritic nickel ore to being smaller in size than 150 microns, a certain amount of moisture and calcium oxide powder then it are added thereto to
End, (binding agent is the compound binding agent containing bentonite and modified starch, wherein, swollen to be subsequently added a certain amount of binding agent
The mass ratio of profit soil and modified starch is 6:1), wherein moisture accounts for the 17% of lateritic nickel ore quality, and lime powder accounts for laterite
The 15% of nickel minerals quality, binding agent quality accounts for the 10% of lateritic nickel ore quality, and said mixture uniformly mixes 10 minutes；
Putting into roller ball press compressing by the material mixed subsequently, ball press pressure is set as 12MPa；The ball of preparation molding
Group puts in the baking oven that temperature is 90 DEG C dries 14 hours；Gained is then dried pelletizing roasting at 1200 DEG C process,
Obtain lateritic nickel ore pelletizing.
Comparative example 3
First by levigate for lateritic nickel ore to being smaller in size than 150 microns, a certain amount of moisture and calcium oxide powder then it are added thereto to
End, (binding agent is the compound binding agent containing bentonite and modified starch, wherein, swollen to be subsequently added a certain amount of binding agent
The mass ratio of profit soil and modified starch is 3:1), wherein moisture accounts for the 42% of lateritic nickel ore quality, and lime powder accounts for laterite
The 4% of nickel minerals quality, binding agent quality accounts for the 22% of lateritic nickel ore quality, and said mixture uniformly mixes 10 minutes；
Putting into roller ball press compressing by the material mixed subsequently, ball press pressure is set as 12MPa；The ball of preparation molding
Group puts in the baking oven that temperature is 90 DEG C dries 14 hours；Gained is then dried pelletizing roasting at 1200 DEG C process,
Obtain lateritic nickel ore pelletizing.
Comparative example 4
First by levigate for lateritic nickel ore to being smaller in size than 150 microns, a certain amount of moisture and calcium oxide powder then it are added thereto to
End, (binding agent is the compound binding agent containing bentonite and modified starch, wherein, swollen to be subsequently added a certain amount of binding agent
The mass ratio of profit soil and modified starch is 3:1), wherein moisture accounts for the 3% of lateritic nickel ore quality, and lime powder accounts for laterite nickel
The 32% of mineral nitrogen amount, binding agent quality accounts for the 1% of lateritic nickel ore quality, and said mixture uniformly mixes 10 minutes；
Putting into roller ball press compressing by the material mixed subsequently, ball press pressure is set as 12MPa；The ball of preparation molding
Group puts in the baking oven that temperature is 90 DEG C dries 14 hours；Gained is then dried pelletizing roasting at 1200 DEG C process,
Obtain lateritic nickel ore pelletizing.
Evaluate:
1, respectively embodiment 1-5 and the comprcssive strength of comparative example 1-4 gained lateritic nickel ore pelletizing and fall strength of briquette are evaluated.
2, evaluation index and method of testing:
The test of comprcssive strength: it is to measure on LDS-Y10A pellet pressure test machine that agglomerate is placed in model, pressure test
Load speed executed by machine is 10mm/min.
Drop resistant strength test method: ball block to 50 centimeter eminence is dropped to rubber slab, dropping to broken number of times is drop resistant intensity.
Test result is as shown in table 1:
Table 1 lateritic nickel ore pellet characteristics contrasts
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes
It is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term necessarily
It is directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be arbitrary
Individual or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be combined by art personnel
And combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (8)
1. the shaft furnace preparation method of lateritic nickel ore pelletizing, it is characterised in that including:
(1) lateritic nickel ore is mixed with water, calcium oxide and binding agent, in order to obtain mixed material；
(2) it is shaped described mixed material processing, in order to obtain molding pelletizing；
(3) described molding pelletizing is carried out drying and processing, in order to obtain drying pelletizing；And
(4) described drying pelletizing is carried out calcination process, in order to obtain lateritic nickel ore pelletizing,
Wherein, it is 100:(5～30 by described lateritic nickel ore and described water, described calcium oxide and described binding agent according to mass ratio):
(5～30): (2～20) mix.
Method the most according to claim 1, it is characterised in that in step (1), by described lateritic nickel ore and institute
Stating water, described calcium oxide and described binding agent according to mass ratio is 100:(10～25): (10～20): (5～15) mix.
Method the most according to claim 1 and 2, it is characterised in that in step (1), described binding agent is choosing
At least one in bentonite and modified starch.
Method the most according to claim 3, it is characterised in that in step (1), described binding agent is containing swollen
Profit soil and the compound binding agent of modified starch, and in described compound binding agent, described bentonite and described modified starch
Mass ratio is (2～5): 1.
5. according to the method according to any one of claim 1-4, it is characterised in that in step (1), described laterite
The particle diameter of nickel minerals is not higher than 150 microns.
6. according to the method according to any one of claim 1-5, it is characterised in that in step (2), described molding
The pressure processed is 11～13MPa.
Method the most according to claim 6, it is characterised in that in step (3), the temperature of described drying and processing
Being 80～100 degrees Celsius, the time is 10～16 hours.
8. according to the method according to any one of claim 1-7, it is characterised in that in step (4), described roasting
The temperature processed is not less than 1200 degrees Celsius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610341625.3A CN105838874A (en) | 2016-05-19 | 2016-05-19 | Method for preparing laterite-nickel ore pellets for shaft furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610341625.3A CN105838874A (en) | 2016-05-19 | 2016-05-19 | Method for preparing laterite-nickel ore pellets for shaft furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105838874A true CN105838874A (en) | 2016-08-10 |
Family
ID=56594056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610341625.3A Pending CN105838874A (en) | 2016-05-19 | 2016-05-19 | Method for preparing laterite-nickel ore pellets for shaft furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105838874A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702149A (en) * | 2016-12-20 | 2017-05-24 | 江苏省冶金设计院有限公司 | System and method for preparing laterite nickel ore oxidized pellets |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007162134A (en) * | 2005-11-28 | 2007-06-28 | Companhia Vale Do Rio Doce | Process for extraction of nickel, cobalt and other base metals from laterite ore by using heap leaching, and product containing nickel, cobalt and other metals from laterite ore |
| CN101935794A (en) * | 2010-10-11 | 2011-01-05 | 北京科技大学 | Method for producing ferro-nickel alloy by using nickel-bearing laterite in shaft furnace and smelting furnace |
| CN102108438A (en) * | 2011-02-12 | 2011-06-29 | 西安建筑科技大学 | Method for producing pellets from laterite-nickel ore |
| CN102162028A (en) * | 2011-05-27 | 2011-08-24 | 广西盛隆冶金有限公司 | Application of laterite nickel ore to production of shaft furnace pellets, and method |
| CN102242259A (en) * | 2011-06-29 | 2011-11-16 | 中南大学 | Preparation process of low-grade laterite nickel ore oxidized pellet |
| CN102758092A (en) * | 2012-07-16 | 2012-10-31 | 钢铁研究总院 | Method for producing nickel iron by comprehensively utilizing low-grade lateritic nickel ore |
| 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 |
| CN103667689A (en) * | 2013-12-05 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Process for briquetting oxidation pellets from laterite nickel ore |
| CN104513898A (en) * | 2013-09-30 | 2015-04-15 | 宝山钢铁股份有限公司 | High-reducibility pellet and preparation method thereof |
-
2016
- 2016-05-19 CN CN201610341625.3A patent/CN105838874A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007162134A (en) * | 2005-11-28 | 2007-06-28 | Companhia Vale Do Rio Doce | Process for extraction of nickel, cobalt and other base metals from laterite ore by using heap leaching, and product containing nickel, cobalt and other metals from laterite ore |
| CN101935794A (en) * | 2010-10-11 | 2011-01-05 | 北京科技大学 | Method for producing ferro-nickel alloy by using nickel-bearing laterite in shaft furnace and smelting furnace |
| CN102108438A (en) * | 2011-02-12 | 2011-06-29 | 西安建筑科技大学 | Method for producing pellets from laterite-nickel ore |
| CN102162028A (en) * | 2011-05-27 | 2011-08-24 | 广西盛隆冶金有限公司 | Application of laterite nickel ore to production of shaft furnace pellets, and method |
| CN102242259A (en) * | 2011-06-29 | 2011-11-16 | 中南大学 | Preparation process of low-grade laterite nickel ore oxidized pellet |
| CN102758092A (en) * | 2012-07-16 | 2012-10-31 | 钢铁研究总院 | Method for producing nickel iron by comprehensively utilizing low-grade lateritic nickel ore |
| 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 |
| CN104513898A (en) * | 2013-09-30 | 2015-04-15 | 宝山钢铁股份有限公司 | High-reducibility pellet and preparation method thereof |
| CN103667689A (en) * | 2013-12-05 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Process for briquetting oxidation pellets from laterite nickel ore |
Non-Patent Citations (3)
| Title |
|---|
| 周建安等: "膨化淀粉对球团矿强度影响的试验研究", 《烧结球团》 * |
| 姜涛编: "《烧结球团生产技术手册》", 30 June 2014, 冶金工业出版社 * |
| 孙传尧主编: "《选矿工程师手册 第2册 上 选矿通论》", 31 March 2015, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702149A (en) * | 2016-12-20 | 2017-05-24 | 江苏省冶金设计院有限公司 | System and method for preparing laterite nickel ore oxidized pellets |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101217392B1 (en) | Self-fluxing pellets for use in a blast furnace and process for the production of the same | |
| CN105063348A (en) | Fluxed MgO pellet ore production method | |
| CN108004362A (en) | Troilite prepares sulfuric acid and the method and system of direct reduced iron | |
| NO20110279A1 (en) | Process for preparing manganese pellets from non-calcined manganese ore and agglomerate obtained by this process | |
| CN104357657A (en) | Method for preparing oxidized pellets from converter dedusting ash | |
| AU2015293370A1 (en) | Method for producing pellets and method for producing iron-nickel alloy | |
| JP5042586B2 (en) | Powder granulation method using desulfurized slag | |
| Tian et al. | Utilization of ground sinter feed for oxidized pellet production and its effect on pellet consolidation and metallurgical properties | |
| CN104480302B (en) | Agglomerating method of pellets containing superfine pulverized coal and superfine quicklime powder | |
| CN106435170B (en) | A kind of Basic Pellets preparation method and preparation and mineral powder mixed material used | |
| CN105838874A (en) | Method for preparing laterite-nickel ore pellets for shaft furnace | |
| AU2014294413B2 (en) | Method for manufacturing briquettes and reduced iron | |
| CN102453824A (en) | Method for producing nickel-iron alloy by using laterite nickel mine | |
| CN109371232A (en) | For reducing the method for pellet expansion rate | |
| CN106367584A (en) | Production method of oxide pellets | |
| CN113122167A (en) | Binder composition and process for producing iron ore pellets | |
| JP4996100B2 (en) | Method for producing sintered ore | |
| CN106591574A (en) | Preparation method for wet copper slag formed pellets | |
| CN102471822B (en) | Unfired carbon-containing agglomerate and production method therefor | |
| CN104263916B (en) | Adhesive for pellet and preparation method of pellet | |
| CN103421922A (en) | Method for producing ferronickel by processing laterite nickel ore in Sulawesi, Indonesia through RKEF technology | |
| JP6369113B2 (en) | Method for producing sintered ore | |
| CN103882223B (en) | A kind of method improving red soil nickel ore bursting temperature of pellet ores | |
| CN113136486B (en) | Production method and formula of pellets added with low-nickel high-iron nickel ore | |
| CN107974559A (en) | A kind of method that high-quality iron smelting pellets are prepared using pyrite cinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination |