CN108676951A - A kind of hydrocarbon joint direct-reduction technique of iron ore concentrate - Google Patents
A kind of hydrocarbon joint direct-reduction technique of iron ore concentrate Download PDFInfo
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- CN108676951A CN108676951A CN201810623885.9A CN201810623885A CN108676951A CN 108676951 A CN108676951 A CN 108676951A CN 201810623885 A CN201810623885 A CN 201810623885A CN 108676951 A CN108676951 A CN 108676951A
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- Prior art keywords
- iron ore
- kiln
- ore concentrate
- carbon residue
- reduction
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/008—Use of special additives or fluxing agents
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of hydrocarbon joint direct-reduction techniques of iron ore concentrate, belong to mineral processing, metallurgical technology field, technique includes dispensing granulation, roasting reduction, material cooling, product handling system and fume treatment link, shortens the rotary kiln baking recovery time, production capacity improves；Metallized pellet intensity is improved, blast furnace or converter materials standard are met, improves iron powder grade and metal recovery rate；System energy consumption is reduced, carbon emission is reduced, is conducive to environmental protection；Preveting kiln ringing improves rotary kiln production operational availability.
Description
Technical field
The invention belongs to mineral processing, liquid crystal technology fields, and in particular to a kind of hydrocarbon joint direct-reduction work of iron ore concentrate
Skill.
Background technology
Modern blast furnace ironmaking production technology passes through long-run development, has become ripe, every technical-economic index and enlargement,
Mechanization, automation and serialization degree are reached high level, meanwhile, it is refined by the tradition " iron, burning, coke " of core of blast furnace
The intrinsic disadvantage of iron process is also more and more prominent, mainly has：First, carbon consumption is high, while the quality requirement of STRENGTH ON COKE is high, and
Coking coal resource is but increasingly in short supply；Second is that environmental pollution, seriously polluted, the matching coking and burning that blast furnace not only itself generates
Knot is even more huge refractory reason pollution sources.Manufacture metallized charge simultaneously uses it for blast fumance, is presently believed to be and can be used to
Improve most promising one of the technology of existing Iron industry.Oxide pellet is substituted using metallized charge, it is high improving
Stove productivity and in terms of reducing reducing agent usage amount it is highly effective, target be it is energy saving during molten iron production, can be real
The fundamental change of existing blast furnace raw material structure.In existing blast furnace 100% reduction process is reduced to certain value, can be mitigated significantly
The load of blast furnace, to make the capacity factor of a blast furnace increase, coke ratio significantly reduces, and since FeO is reduced in furnace charge, makes the life of ferrosilite
It is increased at difficulty, so as to improve slagging process and cohesive zone is made to be thinned and decline, it is advantageous to smooth operation of furnace.Equally, steelmaking converter
It, can partial alternative steel scrap reduction steel-making cost after metallized charge.
It is reduced directly the reduction process that technique is selectivity, reduced iron is without restoring other elements, the metallization of production
The mating dry grinding dry separation technology of furnace charge, other elements and intrinsic oxide can significantly be thrown remove, and can be to prepare superpure metal
Iron powder or electric furnace production clean steel provide quality raw materials.
Rotary kiln is a kind of exemplary device of metallurgical coal-based DR process, and many domestic and foreign rotary kilns are directly also
The producing line of original production metallized pellet, but it is long to be reduced directly the time（8-12h）, production capacity it is low（Ten thousand t/ of 15-25）, material temperature it is higher
（1100-1200℃）, ring formation of rotary kiln problem also generally protrudes.The above factors, which finally embody, arrives high energy consumption, production cost
It is high, it cannot be connected very well with blast furnace, converter close friend, clean steel can not be produced for electric furnace, quality raw materials are provided.
Invention content
The object of the present invention is to provide a kind of hydrocarbon joint direct-reduction techniques of iron ore concentrate, to solve rotary kiln for directly reducing
The problem of process time is long, production capacity is low, material temperature is higher and ring formation.
In order to achieve the above object, the technical solution adopted by the present invention is：
A kind of hydrocarbon joint direct-reduction technique of iron ore concentrate, includes the following steps：
Step 1: dispensing is pelletized：
By iron ore concentrate, carbon residue, bentonite, additive in mass ratio 100：50-60：2：It pelletizes after 1-3 dispensing mixings；
Step 2: roasting reduction：
By after granulation iron ore pellets and part carbon residue grain rotary kiln feeding end is added by ribbon conveyer, material turning round
It is moved to discharge end with the rotation of kiln in kiln, while heat exchange is carried out with flue gas, kiln wall in kiln, temperature is stepped up, and is advanced
Preheated in the process, dry after enter roasting leading portion, temperature of charge is controlled at 830-870 DEG C, in roasting, back segment is by object
Material temperature degree is improved to 950-1000 DEG C, using hydrocarbon joint reduction technique, autothermal equilibrium technology and carbon cycle technology reduced iron fine
Mine pelletizing；
Step 3: material cools down：
The material that direct-reduction is completed in rotary kiln is discharged at 950-1000 DEG C from discharge end, by material in isolation air
In the case of material is cooled to by temperature ≯ 150 DEG C using indirectly cooling method；
Step 4: product handling system：
Material after cooling is sent to dry separation room and carries out carbon residue separation, and the carbon residue isolated enters the recycling of carbon residue storehouse, separation
The metallized pellet gone out enters warehouse for finished product；
Step 5: fume treatment：
580-620 DEG C of flue gas enters gravity settling chamber cooling dedusting at rotary kiln, and temperature enters after being down to 430-470 DEG C
U-tube cooler continues cool to 160-180 DEG C, is discharged after bag filter dedusting.
Additive described in step 1 is Na2CO3。
Iron ore concentrate described in step 1 is magnetite concentrate, hematite concentrates or mixing iron ore concentrate.
Carbon residue granularity described in step 1 is 0-15mm.
The principle that the present invention uses includes：
Hydrocarbon joint reduction technique be roasting material advance in rotary kiln baking, back segment when, pass through rotary kiln discharge end kiln hood
The beans spray gun of cover is thrown into the higher quenched beans of fugitive constituent and makees reducing agent, the beans being thrown into during undergoing coal carbonization,
H in its heated gaseous state pyrolysate released2A part will directly be reducing agent, the H generated after reduction reaction2O and CO2Continue
The gasifying agent of gasification reaction in carbonaceous material is done, realizes hydrocarbon joint reduction, remaining H2And CH4, tar, benzene, the gaseous states such as naphthalene it is dry
Heating fuel will be done from being discharged in mixed material in rotary kiln by evaporating object, and the solid pyrolysate of output, i.e., carbon residue is in mixture
Continue to do carbon based reductive in material.
When autothermal equilibrium technology is that rotary kiln baking restores, the carbonaceous material in kiln is in hot procedure, in coal
Destructive distillation, hydrogen reduction and a large amount of metallurgical gases are produced by the metallurgical reduction reaction of series of core of carbon gasification, and out of material
It is discharged to combustion space in kiln, the calorific value height of the metallurgical gases, temperature are high, and suitable air is incorporated in kiln by the leeward machine of kiln
Combustion-supporting, the heat that metallurgical gases are released just is sufficient for the heat demand of rotary kiln itself, can be reached without outer gas supply fluid fuel
To autothermal equilibrium.
Carbon cycle technology is that the carbon residue isolated in step 4 is incorporated in step 1 to recycle, due to making in step 1
Carbon residue granularity is 0-15mm, and the larger part carbon residue of granularity is not incorporated inside pelletizing, under entering together with iron ore pellets
One process procedure in step 4 up to being separated, since the carbon residue recycled in technical process will continue to occur to be crushed,
Therefore the larger carbon residue of granularity can be increasingly becoming the smaller carbon residue of granularity, until granularity reaches 0-15mm i.e. in step 1 into goal
Until group.
The present invention having the beneficial effect that compared to the prior art：
1, additive Na is incorporated in iron ore pellets2CO3, it is restored using hydrocarbon joint, it can be by the rotary kiln baking recovery time
60-70min is foreshortened to, production capacity is increased to 1,000,000 t/ or more, and pelletizing reducing metal rate reaches 95% or more.
2, additive Na is incorporated in iron ore pellets2CO3, metallized pellet intensity can be improved, meet blast furnace or coverter pig
Material standard；In pelletizing reducing roasting process, additive generates iron crystal grain the effect of accumulation of metal, after metallized pellet mill choosing
5-8 percentage points can be improved in iron powder grade, and metal recovery rate reaches 95% or more, can be to prepare superpure metal iron powder or electric furnace life
It produces clean steel and quality raw materials is provided.
3, in rotary kiln baking, back segment be thrown into the quenched coal of high-volatile, using the H of higher proportion2Participate in pelletizing reduction
Material temperature can be reduced to 950-1000 DEG C, effectively reduce system energy consumption, and H by process2H is generated after reducing iron oxides2O, can
Carbon emission is reduced, environmental protection is conducive to.
4, using 950-1000 DEG C of lower material temperature reduction technique, the temperature spot that FeO forms low-melting compound is not achieved, keeps away
Rotary kiln wall is exempted from and has bonded the low-melting compound liquid phase that FeO is formed, has effectively prevented ring formation of rotary kiln, improve rotary kiln
Production operational availability.
5, using carbon cycle and autothermal equilibrium technology, can not have to outer gas supply fluid fuel can meet rotary kiln self heat need
It wants, further reduced system energy consumption.
Specific implementation mode
The present invention will be further described With reference to embodiment.
A kind of hydrocarbon joint direct-reduction technique of iron ore concentrate, includes the following steps：
Step 1: dispensing is pelletized：
It is 0-15mm carbon residues, bentonite, additive Na by iron ore concentrate, granularity2CO3In mass ratio 100：50-60：2：1-3 dispensings
It pelletizes after mixing；
Step 2: roasting reduction：
By after granulation iron ore pellets and part carbon residue grain rotary kiln feeding end is added by ribbon conveyer, material turning round
It is moved to discharge end with the rotation of kiln in kiln, while heat exchange is carried out with flue gas, kiln wall in kiln, temperature is stepped up, and is advanced
Preheated in the process, dry after enter roasting leading portion, temperature of charge is controlled at 830-870 DEG C, in roasting, back segment is by object
Material temperature degree is improved to 950-1000 DEG C, using hydrocarbon joint reduction technique, autothermal equilibrium technology and carbon cycle technology reduced iron fine
Mine pelletizing；
Step 3: material cools down：
The material that direct-reduction is completed in rotary kiln is discharged at 950-1000 DEG C from discharge end, by material in isolation air
In the case of material is cooled to by temperature ≯ 150 DEG C using indirectly cooling method；
Step 4: product handling system：
Material after cooling is sent to dry separation room and carries out carbon residue separation, and the carbon residue isolated enters the recycling of carbon residue storehouse, separation
The metallized pellet gone out enters warehouse for finished product dry grinding dry separation, obtains iron powder；
Step 5: fume treatment：
580-620 DEG C of flue gas enters gravity settling chamber cooling dedusting at rotary kiln, and temperature enters after being down to 430-470 DEG C
U-tube cooler continues cool to 160-180 DEG C, is discharged after bag filter dedusting.
Additive described in step 1 is Na2CO3。
Iron ore concentrate described in step 1 is magnetite concentrate, hematite concentrates or mixing iron ore concentrate.
Carbon residue granularity described in step 1 is 0-15mm.
Embodiment 1：
A kind of hydrocarbon joint direct-reduction technique of iron ore concentrate, including following process procedure：
The selection of raw material：
Mix iron ore concentrate：TFe 53%、FeO 18.85%、SiO2 8.5%
The quenched coal of high-volatile：Ad 10.04%、Vdaf 35.21%、Fcad 56.62%、St.d 0.6% Mt 9.9
Qnet.var 22910J/g
Step 1: dispensing is pelletized：
By iron ore concentrate, carbon residue, bentonite, the additive Na that granularity is 0-15mm2CO3In mass ratio 100：60：2：3 dispensing mixings
After pelletize.
Step 2: roasting reduction：
By after granulation iron ore pellets and part carbon residue grain rotary kiln feeding end is added by ribbon conveyer, material turning round
It is moved to discharge end with the rotation of kiln in kiln, while heat exchange is carried out with flue gas, kiln wall in kiln, temperature is stepped up, and is advanced
Preheated in the process, dry after enter roasting leading portion, adjustment kiln the back of the body fan combustion-supportincombustion wind by temperature of charge control at 830 DEG C,
In roasting, the back segment adjustment kiln back of the body fan combustion-supportincombustion wind temperature of charge is improved to 950 DEG C, the control of total roasting time is in 60min, kiln hood
Beans spray gun is continuously thrown into the quenched coal of high-volatile by 0.65 times of carbon residue amount of allocating, using hydrocarbon joint reduction technique, self-heating
Balancing technique and carbon cycle technology reduced iron Concentrate Pellet.
Step 3: material cools down：
The metallization material that direct-reduction is completed in rotary kiln is discharged at 950 DEG C from discharge end, and metalliferous material is being completely cut off
Enter folder cylinder cold mine machine in the case of air and material is cooled to by temperature ≯ 150 DEG C using indirectly cooling method.
Step 4: product handling system：
Metallization material after cooling is discharged to finished product ribbon conveyer by lock gas unloading valve from the cold mine machine of roller and is sent to dry separation room,
Carbon residue separation is carried out by dry-type magnetic cobber for permanent magnetic powder ore, the carbon residue isolated is sent to carbon residue storehouse by chute, then is transported to residual
Charcoal receiver bin dispensing recycles；The metallized pellet isolated falls directly into the warehouse for finished product of dry separation room lower part.
Step 5: fume treatment：
580 DEG C of flue gas enters gravity settling chamber cooling dedusting at rotary kiln, and it is cold that temperature enters U-tube after being down to 430 DEG C
But device continues cool to 160 DEG C, is discharged after bag filter dedusting.
The detection of TFe, MFe ingredient and compression strength index is carried out to obtained metallized pellet（Wherein TFe indicates metal
The percentage composition of iron in pellet, MFe indicate that the percentage composition of metallic iron in metallized pellet, compression strength refer to metallization ball
Strength degree of the group in natural compression）；Then TFe detections are carried out to the iron powder after metallized pellet mill choosing.Testing result is shown in
Table one：
One iron ore concentrate metallized pellet testing result of table
Embodiment 2：
A kind of hydrocarbon joint direct-reduction technique of iron ore concentrate, including following process procedure：
The selection of raw material：
Magnetite concentrate：TFe 61.2%、FeO 26.49%、SiO2 7.5%
The quenched coal of high-volatile：Ad 10.04%、Vdaf 35.21%、Fcad 56.62%、St.d 0.6% Mt 9.9
Qnet.var 22910J/g
Step 1: dispensing is pelletized：
By iron ore concentrate, carbon residue, bentonite, the additive Na that granularity is 0-15mm2CO3In mass ratio 100：50：2：1 dispensing mixing
After pelletize.
Step 2: roasting reduction：
By after granulation iron ore pellets and part carbon residue grain rotary kiln feeding end is added by ribbon conveyer, material turning round
It is moved to discharge end with the rotation of kiln in kiln, while heat exchange is carried out with flue gas, kiln wall in kiln, temperature is stepped up, and is advanced
Preheated in the process, dry after enter roasting leading portion, adjustment kiln the back of the body fan combustion-supportincombustion wind by temperature of charge control at 870 DEG C,
In roasting, the back segment adjustment kiln back of the body fan combustion-supportincombustion wind temperature of charge is improved to 1000 DEG C, the control of total roasting time is in 62min, kiln
Head beans spray gun is continuously thrown into the quenched coal of high-volatile by 0.65 times of carbon residue amount of allocating, using hydrocarbon joint reduction technique, certainly
Stem heat balance technique and carbon cycle technology reduced iron Concentrate Pellet；
Step 3: material cools down：
The metallization material that direct-reduction is completed in rotary kiln is discharged at 1000 DEG C from discharge end, and metalliferous material is being completely cut off
Enter folder cylinder cold mine machine in the case of air and material is cooled to by temperature ≯ 150 DEG C using indirectly cooling method.
Step 4: product handling system：
Metallization material after cooling is discharged to finished product ribbon conveyer by lock gas unloading valve from the cold mine machine of roller and is sent to dry separation room,
Carbon residue separation is carried out by dry-type magnetic cobber for permanent magnetic powder ore, the carbon residue isolated is sent to carbon residue storehouse by chute, then is transported to residual
Charcoal receiver bin dispensing recycles；The metallized pellet isolated falls directly into the warehouse for finished product of dry separation room lower part.
Step 5: fume treatment：
620 DEG C of flue gas enters gravity settling chamber cooling dedusting at rotary kiln, and it is cold that temperature enters U-tube after being down to 470 DEG C
But device continues cool to 180 DEG C, is discharged after bag filter dedusting.
The detection of TFe, MFe ingredient and compression strength index is carried out to obtained metallized pellet（Wherein TFe indicates metal
The percentage composition of iron in pellet, MFe indicate that the percentage composition of metallic iron in metallized pellet, compression strength refer to metallization ball
Strength degree of the group in natural compression）；Then TFe detections are carried out to the iron powder after metallized pellet mill choosing.Testing result is shown in
Table two：
Two iron ore concentrate metallized pellet testing result of table
Embodiment 3：
A kind of hydrocarbon joint direct-reduction technique of iron ore concentrate, including following process procedure：
The selection of raw material：
Hematite concentrates：TFe 45.24%、FeO 11.20%、SiO2 10.58%
The quenched coal of high-volatile：Ad 10.04%、Vdaf 35.21%、Fcad 56.62%、St.d 0.6% Mt 9.9
Qnet.var 22910J/g
Step 1: dispensing is pelletized：
By iron ore concentrate, carbon residue, bentonite, the additive Na that granularity is 0-15mm2CO3In mass ratio 100：55：2：2 dispensing mixings
After pelletize.
Step 2: roasting reduction：
By after granulation iron ore pellets and part carbon residue grain rotary kiln feeding end is added by ribbon conveyer, material turning round
It is moved to discharge end with the rotation of kiln in kiln, while heat exchange is carried out with flue gas, kiln wall in kiln, temperature is stepped up, and is advanced
Preheated in the process, dry after enter roasting leading portion, adjustment kiln the back of the body fan combustion-supportincombustion wind by temperature of charge control at 850 DEG C,
In roasting, the back segment adjustment kiln back of the body fan combustion-supportincombustion wind temperature of charge is improved to 980 DEG C, the control of total roasting time is in 62min, kiln hood
Beans spray gun is continuously thrown into the quenched coal of high-volatile by 0.65 times of carbon residue amount of allocating, using hydrocarbon joint reduction technique, self-heating
Balancing technique and carbon cycle technology reduced iron Concentrate Pellet；
Step 3: material cools down：
The metallization material that direct-reduction is completed in rotary kiln is discharged at 980 DEG C from discharge end, and metalliferous material is being completely cut off
Enter folder cylinder cold mine machine in the case of air and material is cooled to by temperature ≯ 150 DEG C using indirectly cooling method.
Step 4: product handling system：
Metallization material after cooling is discharged to finished product ribbon conveyer by lock gas unloading valve from the cold mine machine of roller and is sent to dry separation room,
Carbon residue separation is carried out by dry-type magnetic cobber for permanent magnetic powder ore, the carbon residue isolated is sent to carbon residue storehouse by chute, then is transported to residual
Charcoal receiver bin dispensing recycles；The metallized pellet isolated falls directly into the warehouse for finished product of dry separation room lower part.
Step 5: fume treatment：
600 DEG C of flue gas enters gravity settling chamber cooling dedusting at rotary kiln, and it is cold that temperature enters U-tube after being down to 450 DEG C
But device continues cool to 170 DEG C, is discharged after bag filter dedusting.
The detection of TFe, MFe ingredient and compression strength index is carried out to obtained metallized pellet（Wherein TFe indicates metal
The percentage composition of iron in pellet, MFe indicate that the percentage composition of metallic iron in metallized pellet, compression strength refer to metallization ball
Strength degree of the group in natural compression）；Then TFe detections are carried out to the iron powder after metallized pellet mill choosing.Testing result is shown in
Table three：
Three iron ore concentrate metallized pellet testing result of table
Claims (4)
1. a kind of hydrocarbon joint direct-reduction technique of iron ore concentrate, it is characterised in that include the following steps：
Step 1: dispensing is pelletized：
By iron ore concentrate, carbon residue, bentonite, additive in mass ratio 100：50-60：2：It pelletizes after 1-3 dispensing mixings；
Step 2: roasting reduction：
By after granulation iron ore pellets and part carbon residue grain rotary kiln feeding end is added by ribbon conveyer, material turning round
It is moved to discharge end with the rotation of kiln in kiln, while heat exchange is carried out with flue gas, kiln wall in kiln, temperature is stepped up, and is advanced
Preheated in the process, dry after enter roasting leading portion, temperature of charge is controlled at 830-870 DEG C, in roasting, back segment is by object
Material temperature degree is improved to 950-1000 DEG C, using hydrocarbon joint reduction technique, autothermal equilibrium technology and carbon cycle technology reduced iron fine
Mine pelletizing；
Step 3: material cools down：
The material that direct-reduction is completed in rotary kiln is discharged at 950-1000 DEG C from discharge end, by material in isolation air
In the case of material is cooled to by temperature ≯ 150 DEG C using indirectly cooling method；
Step 4: product handling system：
Material after cooling is sent to dry separation room and carries out carbon residue separation, and the carbon residue isolated enters the recycling of carbon residue storehouse, separation
The metallized pellet gone out enters warehouse for finished product；
Step 5: fume treatment：
580-620 DEG C of flue gas enters gravity settling chamber cooling dedusting at rotary kiln, and temperature enters after being down to 430-470 DEG C
U-tube cooler continues cool to 160-180 DEG C, is discharged after bag filter dedusting.
2. the hydrocarbon joint direct-reduction technique of iron ore concentrate as described in claim 1, it is characterised in that：It is added described in step 1
Agent is Na2CO3。
3. the hydrocarbon joint direct-reduction technique of iron ore concentrate as claimed in claim 1 or 2, it is characterised in that：Described in step 1
Iron ore concentrate is magnetite concentrate, hematite concentrates or mixing iron ore concentrate.
4. the hydrocarbon joint direct-reduction technique of iron ore concentrate as claimed in claim 3, it is characterised in that：Carbon residue described in step 1
Granularity is 0-15mm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195155A (en) * | 2019-06-14 | 2019-09-03 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of refractory iron ore bone coal base either shallow hydrogen metallurgical technology and its device |
| CN110195156A (en) * | 2019-06-14 | 2019-09-03 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore rotary kiln coal base hydrogen metallurgical technology and its device |
| CN115478162A (en) * | 2022-09-20 | 2022-12-16 | 中冶北方（大连）工程技术有限公司 | Novel process for recovering iron from iron-containing red mud |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104862440A (en) * | 2015-03-19 | 2015-08-26 | 中南大学 | Low-grade iron ore direct reduction method |
| CN106591572A (en) * | 2017-01-06 | 2017-04-26 | 中南大学 | Method for reinforcing preparation and reduction of carbon-containing pellets in iron ore |
| CN107083479A (en) * | 2017-05-25 | 2017-08-22 | 江苏省冶金设计院有限公司 | The processing system and processing method of a kind of ferrous manganese ore |
-
2018
- 2018-06-15 CN CN201810623885.9A patent/CN108676951A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104862440A (en) * | 2015-03-19 | 2015-08-26 | 中南大学 | Low-grade iron ore direct reduction method |
| CN106591572A (en) * | 2017-01-06 | 2017-04-26 | 中南大学 | Method for reinforcing preparation and reduction of carbon-containing pellets in iron ore |
| CN107083479A (en) * | 2017-05-25 | 2017-08-22 | 江苏省冶金设计院有限公司 | The processing system and processing method of a kind of ferrous manganese ore |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195155A (en) * | 2019-06-14 | 2019-09-03 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of refractory iron ore bone coal base either shallow hydrogen metallurgical technology and its device |
| CN110195156A (en) * | 2019-06-14 | 2019-09-03 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore rotary kiln coal base hydrogen metallurgical technology and its device |
| CN115478162A (en) * | 2022-09-20 | 2022-12-16 | 中冶北方（大连）工程技术有限公司 | Novel process for recovering iron from iron-containing red mud |
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