CN110408774A - A kind of chromite fine ore sintering processing method - Google Patents
A kind of chromite fine ore sintering processing method Download PDFInfo
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- CN110408774A CN110408774A CN201910803792.9A CN201910803792A CN110408774A CN 110408774 A CN110408774 A CN 110408774A CN 201910803792 A CN201910803792 A CN 201910803792A CN 110408774 A CN110408774 A CN 110408774A
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- sintering
- raw material
- chromite
- fine ore
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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
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
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- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to technical field of ferrous metallurgy, especially a kind of chromite fine ore sintering processing method, include the following steps: to select raw material, screening and mixing, raw material is levigate processing, pelletization treatment, wrap up fuel, sintering processes and post-processing, sintering processes to include step specific as follows: grate-layer material, filler, pretreatment of raw material and ignition sintering.The chromite fine ore sintering processing method passes through addition bentonite adhesive, to which the granulation for facilitating chromite fine ore is agglomerating, efficiently solve the problems, such as difficulty of pelletizing in the prior art, and pass through the pretreatment of raw material in sintering processes, raw material in sintering machine is first dried, it is preheated again, finally carry out ignition sintering, so as to improve the sintering efficiency and sintering quality of chromite fine ore, and simple process, operation fluency is strong, while can also save certain material burning consumption.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy more particularly to a kind of chromite fine ore sintering processing methods.
Background technique
In sintering processes of the contemporary field of steel metallurgy for chromite fine ore, currently, the water due to chromite soaks
Property it is poor, individual chromite powder mine disaster in pelletize it is agglomerating, have a negative impact to sintering effect, while also increasing chromite powder
The technical difficulty of mine sintering, and at present in the sintering process of chromite, the process is more complicated, and sintering efficiency is lower, moreover,
The product intensity of obtained sinter is smaller, and quality is not ideal enough, while yield is also relatively small.Therefore, in view of the above-mentioned problems,
It needs to innovate it improvement.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of chromite powder mine sintering proposed
Processing method.
To achieve the goals above, present invention employs following technical solutions:
A kind of chromite fine ore sintering processing method is designed, is included the following steps:
S1), select raw material: selection gets out chromite fine ore, preceding chromite, bentonite adhesive and fuel；
S2), sieve and mix: first taking out step S1) in whole preceding chromite, and its whole is added to vibrating screen
Sieved in extension set, after the completion, take out all screen out come powders, and using a part in these powders as sintering at
The grate-layer material of returning mine of reason, then by another part and step S1) in whole chromite fine ore progress mixed processings, mixed
Raw material；
S3), the levigate processing of raw material: take out step S2) in whole mixed raw material, and these mixed raw materials are all added
Sufficiently uniformly levigate processing is carried out into levigate machine, obtains fine powder raw material, it is spare；
S4), pelletization treatment: take out step S3) in whole fine powder raw material and step S1) in bentonite adhesive,
Then bentonite adhesive is all added in fine powder raw material, and by using blender that bentonite adhesive is all equal
It is mixed into fine powder raw material, is then allowed to stand 0.5-1 hours, then, the fine powder raw material for being blended with bentonite adhesive is complete evenly
Portion is added in granulator and pelletizes, and obtains granular feedstock；
S5), wrap up fuel: the package for carrying out fuel on the outer surface of granular feedstock obtained in step S4) is handled；
S6), sintering processes: the granular feedstock for being enclosed with fuel obtained in step S5) is started to be sintered；
The sintering processes include step specific as follows:
A, grate-layer material: take out step S2) obtained in return mine grate-layer material, and these grate-layer materials of returning mine equably are laid on
The inner wall bottom position of sintering machine；
B, filler: the granular feedstock that fuel is enclosed with obtained in step S5) is all added in sintering machine；
C, pretreatment of raw material: being first dried the raw material in sintering machine, after, then by adjusting in sintering machine
Heating device, heat up to raw material, to achieve the effect that preheating；
D, ignition sintering: adjusting sintering machine, start to light a fire, and raw material layer starts to generate sintering phenomenon；
S7), post-processing: after the completion of sintering, taking out whole raw materials, starts successively to carry out break process, cooling to it
Processing and Screening Treatment, can be obtained the sinter finished product of chromite fine ore.
Preferably, in step S2), mixed processing specifically uses SZ type Double cone mixer, and incorporation time is 40-60 points
Clock.
Preferably, in step S5), package processing specifically comprises the following steps: first all to add fuel and granular feedstock
Enter and be sufficiently mixed into batch mixer, then whole mixed materials is added to the packet for carrying out fuel in granulator again again
It wraps up in.
Preferably, in the step C in step S6), drying process specifically comprises the following steps: by adjusting in sintering machine
Heating device so that heating temperature be 310-340 DEG C, it is sufficiently dry so as to achieve the effect that, and drying time be
0.5-1 hours.
Preferably, the heating device is specifically using heating molybdenum sheet.
It preferably, is 300-350 DEG C to the temperature elevating range that raw material heats up in the step C in step S6), thus
The temperature of raw material in sintering machine is enabled to reach the temperature well preheated.
Preferably, in the step D in step S6), the temperature of igniting is 1060-1090 DEG C.
Preferably, in step S7), Screening Treatment specifically uses vibrating screen to carry out the screening of material, passes through vibrating screen
Sinter finished product of the material returned mine, and be separated that material is sintered as chromite as chromite fine ore, after being used for
Continuous process.
A kind of chromite fine ore sintering processing method proposed by the present invention, beneficial effect are: the chromite powder mine sintering
Processing method is efficiently solved existing by adding bentonite adhesive so that the granulation for facilitating chromite fine ore is agglomerating
The problem for difficulty of pelletizing in technology, and by the pretreatment of raw material in sintering processes, the raw material in sintering machine is first done
It is dry, then preheated, ignition sintering is finally carried out, so as to improve the sintering efficiency and sintering quality of chromite fine ore, and
And simple process, operation fluency is strong, while can also save certain material burning consumption, then pass through in post-processing to burning
Material after the completion of knot successively carries out break process, cooling treatment and Screening Treatment, so that chromite powder can not only be improved
The intensity and yield of the sinter finished product of mine, and returning mine for chromite can be obtained again, to realize returning for material
Receipts recycle, and avoid waste.
Specific embodiment
Here is that technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.
A kind of chromite fine ore sintering processing method, includes the following steps:
S1), select raw material: selection gets out chromite fine ore, preceding chromite, bentonite adhesive and fuel；
S2), sieve and mix: first taking out step S1) in whole preceding chromite, and its whole is added to vibrating screen
Sieved in extension set, after the completion, take out all screen out come powders, and using a part in these powders as sintering at
The grate-layer material of returning mine of reason, then by another part and step S1) in whole chromite fine ore progress mixed processings, mixed
Raw material；
In step S2), mixed processing specifically uses SZ type Double cone mixer, and incorporation time is 40-60 minutes.
S3), the levigate processing of raw material: take out step S2) in whole mixed raw material, and these mixed raw materials are all added
Sufficiently uniformly levigate processing is carried out into levigate machine, obtains fine powder raw material, it is spare；
S4), pelletization treatment: take out step S3) in whole fine powder raw material and step S1) in bentonite adhesive,
Then bentonite adhesive is all added in fine powder raw material, and by using blender that bentonite adhesive is all equal
It is mixed into fine powder raw material, is then allowed to stand 0.5-1 hours, then, the fine powder raw material for being blended with bentonite adhesive is complete evenly
Portion is added in granulator and pelletizes, and obtains granular feedstock；
S5), wrap up fuel: the package for carrying out fuel on the outer surface of granular feedstock obtained in step S4) is handled；
In step S5), package processing specifically comprises the following steps: that fuel and granular feedstock are all first added to mixing
It is sufficiently mixed in machine, then whole mixed materials is added to the package for carrying out fuel in granulator again again.
S6), sintering processes: the granular feedstock for being enclosed with fuel obtained in step S5) is started to be sintered；
The sintering processes include step specific as follows:
A, grate-layer material: take out step S2) obtained in return mine grate-layer material, and these grate-layer materials of returning mine equably are laid on
The inner wall bottom position of sintering machine；
B, filler: the granular feedstock that fuel is enclosed with obtained in step S5) is all added in sintering machine；
C, pretreatment of raw material: being first dried the raw material in sintering machine, after, then by adjusting in sintering machine
Heating device, heat up to raw material, to achieve the effect that preheating；
In step C in step S6), it is dried and specifically comprises the following steps: by adjusting the heating in sintering machine
Device, so that heating temperature is 310-340 DEG C, it is sufficiently dry so as to achieve the effect that, and drying time is that 0.5-1 is small
When, the heating device is specifically using heating molybdenum sheet.
It is 300-350 DEG C to the temperature elevating range that raw material heats up in step C in step S6), so that
The temperature of raw material reaches the temperature well preheated in sintering machine.
D, ignition sintering: adjusting sintering machine, start to light a fire, and raw material layer starts to generate sintering phenomenon；
In step D in step S6), the temperature of igniting is 1060-1090 DEG C.
S7), post-processing: after the completion of sintering, taking out whole raw materials, starts successively to carry out break process, cooling to it
Processing and Screening Treatment, can be obtained the sinter finished product of chromite fine ore.
In step S7), Screening Treatment specifically uses vibrating screen to carry out the screening of material, passes through the material conduct of vibrating screen
Sinter finished product of the material of chromite sintering returned mine, and be separated as chromite fine ore, is used for subsequent processing
Process.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of chromite fine ore sintering processing method, which comprises the steps of:
S1), select raw material: selection gets out chromite fine ore, preceding chromite, bentonite adhesive and fuel；
S2), sieve and mix: first taking out step S1) in whole preceding chromite, and its whole is added to vibrating screening machine
In sieved, after the completion, the powders for all screening out are taken out, and using a part in these powders as sintering processes
Return mine grate-layer material, then by another part and step S1) in whole chromite fine ore carry out mixed processing, it is former to obtain mixing
Material；
S3), the levigate processing of raw material: take out step S2) in whole mixed raw material, and these mixed raw materials are all added to mill
Sufficiently uniformly levigate processing is carried out in thin machine, obtains fine powder raw material, it is spare；
S4), pelletization treatment: take out step S3) in whole fine powder raw material and step S1) in bentonite adhesive, then
Bentonite adhesive is all added in fine powder raw material, and by using blender that bentonite adhesive is whole equably
It is mixed into fine powder raw material, is then allowed to stand 0.5-1 hours, then, the fine powder raw material for being blended with bentonite adhesive all adds
Enter and pelletize into granulator, obtains granular feedstock；
S5), wrap up fuel: the package for carrying out fuel on the outer surface of granular feedstock obtained in step S4) is handled；
S6), sintering processes: the granular feedstock for being enclosed with fuel obtained in step S5) is started to be sintered；
The sintering processes include step specific as follows:
A, grate-layer material: take out step S2) obtained in return mine grate-layer material, and these grate-layer materials of returning mine equably are laid on sintering
The inner wall bottom position of machine；
B, filler: the granular feedstock that fuel is enclosed with obtained in step S5) is all added in sintering machine；
C, pretreatment of raw material: being first dried the raw material in sintering machine, after, then by adjusting adding in sintering machine
Thermal heats up to raw material, to achieve the effect that preheating；
D, ignition sintering: adjusting sintering machine, start to light a fire, and raw material layer starts to generate sintering phenomenon；
S7), post-processing: after the completion of sintering, taking out whole raw materials, starts successively to carry out break process, cooling treatment to it
And Screening Treatment, the sinter finished product of chromite fine ore can be obtained.
2. a kind of chromite fine ore sintering processing method according to claim 1, which is characterized in that in step S2), mix
It closes processing and specifically uses SZ type Double cone mixer, and incorporation time is 40-60 minutes.
3. a kind of chromite fine ore sintering processing method according to claim 1, which is characterized in that in step S5), packet
It wraps up in processing and specifically comprises the following steps: first all to be added to fuel in batch mixer with granular feedstock and be sufficiently mixed, then
Whole mixed materials is added to the package that fuel is carried out in granulator again again.
4. a kind of chromite fine ore sintering processing method according to claim 1, which is characterized in that in step S6)
In step C, it is dried and specifically comprises the following steps: by adjusting the heating device in sintering machine, so that heating temperature is
It is 310-340 DEG C, sufficiently dry so as to achieve the effect that, and drying time is 0.5-1 hours.
5. a kind of chromite fine ore sintering processing method according to claim 4, which is characterized in that the heating device tool
Body is using heating molybdenum sheet.
6. a kind of chromite fine ore sintering processing method according to claim 1, which is characterized in that in step S6)
It is 300-350 DEG C to the temperature elevating range that raw material heats up, so that the temperature of raw material reaches in sintering machine in step C
To the temperature well preheated.
7. a kind of chromite fine ore sintering processing method according to claim 1, which is characterized in that in step S6)
In step D, the temperature of igniting is 1060-1090 DEG C.
8. a kind of chromite fine ore sintering processing method according to claim 1, which is characterized in that in step S7), sieve
Choosing processing specifically carries out the screening of material using vibrating screen, is returned mine by the material of vibrating screen as what chromite was sintered, and by
Sinter finished product of the material separated as chromite fine ore is used for subsequent process.
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| CN201910803792.9A CN110408774A (en) | 2019-08-28 | 2019-08-28 | A kind of chromite fine ore sintering processing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113462890A (en) * | 2021-06-29 | 2021-10-01 | 鞍钢股份有限公司 | Iron ore powder sintering process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705356A (en) * | 2009-12-07 | 2010-05-12 | 中南大学 | Sintering technology of ferrochrome mineral powder |
| CN104152679A (en) * | 2014-09-01 | 2014-11-19 | 重庆大学 | Ultrasonic field sintering pallet and ultrasonic reinforced iron ore powder sintering method |
-
2019
- 2019-08-28 CN CN201910803792.9A patent/CN110408774A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705356A (en) * | 2009-12-07 | 2010-05-12 | 中南大学 | Sintering technology of ferrochrome mineral powder |
| CN104152679A (en) * | 2014-09-01 | 2014-11-19 | 重庆大学 | Ultrasonic field sintering pallet and ultrasonic reinforced iron ore powder sintering method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113462890A (en) * | 2021-06-29 | 2021-10-01 | 鞍钢股份有限公司 | Iron ore powder sintering process |
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Application publication date: 20191105 |
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