CN103805773B - Powdered iron Ore Carbon cycle oxygen supplement direct-reduction produces metallization iron powder method - Google Patents
Powdered iron Ore Carbon cycle oxygen supplement direct-reduction produces metallization iron powder method Download PDFInfo
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Abstract
The present invention relates to metallurgical technology field, particularly powdered iron Ore Carbon cycle oxygen supplement direct-reduction produces metallization iron powder method.High silicon refractory iron ore raw material is tentatively pulverized by invention, and selecting iron ore granularity is 2～16mm, the quality of fixed carbon in semi-coke > 70%, semi-coke granularity is 3～8mm；Limestone is divided into powdered lime stone and block limestone, and the granularity of powdered lime stone is 1～5mm, and the granularity of block limestone is 8～16mm；It is easy to produce metallization iron powder smoothly by the granularity controlling reactant.Iron ore, limestone, semi-coke are carried out dispensing by weight 100:10～20:15～30 simultaneously, high silicon refractory iron ore can be carried out also original production.
Description
Technical field
The present invention relates to metallurgical technology field, particularly powdered iron Ore Carbon cycle oxygen supplement direct-reduction produces metallization ferrum
Powder method.
Background technology
China's iron ore deposit enriches, but the iron mine of more than 96% is lean ore, and the average Iron grade of lean ore is 32.6%, and in lean ore
Majority is high silicon refractory iron ore, its Iron grade low 28～35%, silicone content high 20～48%.Along with quickly sending out of China's steel and iron industry
Exhibition, rises year by year to the demand of iron ore, and iron ore resource, after exploitation for many years, is available for the abundant ore source of utilization the most very
Few, and the principle that various countries are lean, easy first and difficult later after the exploitation of mineral resources is typically followed getting rich first.Therefore, it is available for utilizing in China
Iron ore deposit increasingly tend to that lean, thin, miscellaneous and price sharp rises big in the case of, the refractory iron ore resource that reserves are bigger is high
The technical research that effect utilizes has been put on schedule.At present, Low-grade and hard-to-separate iron ore stone is mainly characterized by that grade is low and ferrum aoxidizes
The crystal grain of thing is fine, and cloth embedding with stone-like pulse is tight, and part iron mineral is glial state, and liberation degree of minerals is relatively low.Use the strong of routine
The common process such as magnetic separation process, magnetizing roast low intensity magnetic separation, flotation are difficult to effective enrichment of iron mineral, especially as ultra micro
Thin low-grade high silicon iron ore resource, owing to its valuable mineral disseminated grain size mineralogical property superfine, former is complicated, uses magnetic separation side
It is big that method develops difficulty, and the Iron concentrate grade simultaneously obtained is relatively low.Wherein the block refractory iron ore more than 2mm can use
The reduction apparatus such as rotary kiln process, and the powdery refractory iron ore less than 2mm directly enters rotary kiln to carry out high temperature reduction and easily produce
Raw ring formation, is difficult to industrialization and utilizes.
Summary of the invention
It is an object of the invention to provide a kind of percent reduction height, consumption of raw materials is little, be applicable to the powdered iron of poor value
Ore Carbon cycle oxygen supplement direct-reduction produces metallization iron powder method.
The technical solution adopted for the present invention to solve the technical problems is:
Powdered iron Ore Carbon cycle oxygen supplement direct-reduction produces metallization iron powder method, specifically comprises the following steps that
A, material choice
Iron ore granularity<2mm, the quality of fixed carbon in semi-coke>70%, semi-coke granularity is 3～8mm；Limestone is divided into powdery
Limestone and block limestone, the granularity of powdered lime stone is 1～5mm, and the granularity of block limestone is 8～16mm；
B, grinding magnetic concentration
Iron ore is ground, and grinding particle size is 200 mesh, and magnetic concentration makes the Iron grade of iron mine more than 40%；
C, join pelletizing material
Enrichment iron mine, bentonite and Borax are carried out mix by weight 100:2.5～3.0:0.6～0.9；
D, mixed material profit mill
Mixed material is poured in damp mill, and profit time consuming is 8～10min；
E, profit grind materials pelletizing
Profit grind materials being conveyed into pelletizer, makes it moisten profit grind materials water spray, pelletizer work will profit grind materials rolling
Become green-ball；
F, green-ball sieve
Using round roller sieve to screen qualified green-ball, the granularity of qualified green-ball is 8～16mm, and the green-ball screened out is beaten through beater
Step E pelletizing again is returned after Saning；
G, green-ball be dried
Qualified green-ball is sent in grate and is dried, and is passed through the flue gas of 350～650 DEG C in grate, and drying time is controlled
Being made as 20～30min, flue gas flow velocity in grate is 2～3m/s, and it is 150～250 DEG C that the baking temperature of green-ball controls；
H, green-ball reduction roasting
Dried green-ball, limestone, semi-coke are carried out dispensing by weight 100:10～20:15～30；To give birth to after drying
Ball, block limestone and semi-coke mix homogeneously, mixed material is in the funnel feeding rotary kiln of kiln tail, and mixed material is in kiln
Carrying out roasting, the sintering temperature of mixed material is 1050～1200 DEG C, and the recovery time is 30～60min；It is thrown into powdery from kiln hood
Limestone reacts with hot mixture material；
I, material cool down
Hot mixture material, after kiln hood is discharged, carries out anaerobic cooling in vertical gasifier, and cooling medium uses
Blast furnace gas, discharges from cooler when high-temperature material is cooled to below 200～300 DEG C；
J, material dry separation
Material after cooling, after magnetic pulley dry separation, can get magnetic material and non-magnetic material；
K, magnetic material process
Magnetic material is through wet separation and is ground, and grinding particle size is 200 mesh, obtains the iron powder that metallizes.
Further comprise the steps of:
L, the process of non-magnetic material
Being sieved by non-magnetic material in step J, mesh size is 5mm, screens out lump lime and powder, powder
Comprising semi-coke, quick lime and ash, powder selects unreacted semi-coke through selecting crude drugs with winnower again, and unreacted semi-coke is returned as rotary kiln
Material uses；Containing powdery quick lime and fine powder in residue powder, powdery quick lime and fine powder make as sintered material
With.
In described step K, metallization iron powder and coal dust being hot pressed into iron mine carbonaceous pelletizing, iron mine carbonaceous pelletizing is in blast furnace
Molten steel is prepared in reaction.
Described powder selects unreacted semi-coke through selecting crude drugs with winnower, and unreacted semi-coke granularity is 2mm ~ 5mm, unreacted orchid
Charcoal uses as rotary kiln returning charge；Containing powdery quick lime and fine powder in residue powder, powdery quick lime granularity be 2mm ~
5mm, powder particle size is 0.2mm ~ 2mm, and powdery quick lime and fine powder use as sintered material.
The invention have the benefit that
1, high silicon refractory iron ore raw material is tentatively pulverized by the present invention, and selecting iron ore granularity is 2～16mm, in semi-coke
The quality of fixed carbon > 70%, semi-coke granularity is 3～8mm；Limestone is divided into powdered lime stone and block limestone, powdered lime stone
Granularity be 1～5mm, the granularity of block limestone is 8～16mm；It is easy to produce smoothly metal by the granularity controlling reactant
Change iron powder.Iron ore, limestone, semi-coke are carried out dispensing by weight 100:10～20:15～30 simultaneously, can be difficult to high silicon
Iron mine is selected to carry out also original production.
2, adding the limestone prepared and semi-coke during reduction roasting in stove, carry out oxygen supplement reduction roasting, limestone is heated to
When more than 890 DEG C, decomposite certain CO2, CO2At high temperature react with the C generating gasification in semi-coke and generate high concentration CO,
CO contacts with Ore and makes iron ore efficiently reduce.The remaining lump lime of simultaneous reactions and unreacted semi-coke backfill into
In rotary kiln, not only save consumption of raw materials, and further enhancing reaction effect, it is adaptable to high silicon refractory iron ore.
3, during reduction roasting, bulk limestone and block semi-coke add from kiln tail, and kiln hood is thrown into powdered lime stone so that whole
Individual reducing roasting process is carried out the most in a reducing environment, it is therefore prevented that reactant aoxidizes with air contact, improves production effect
Rate.
4, iron ore is carried out classification reduction roasting by grade 2～8mm and 8～16mm, to improve ore reduction quality.
Being sieved by remaining for reaction non-magnetic material, lump lime and unreacted semi-coke backfill in rotary kiln, and powdery is raw
Calx and fine powder use as sintered material, and the service efficiency of raw material is greatly improved.
In sum, the present invention is applicable to high silicon refractory iron ore, through the available degree of metalization of reaction > 90%, Iron grade >
The metallization iron powder of 80% so that high silicon refractory iron ore can be effectively utilized.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention.
Detailed description of the invention
Powdered iron Ore Carbon cycle oxygen supplement direct-reduction as depicted produces metallization iron powder method, and concrete steps are such as
Under:
A, material choice
Iron ore granularity<2mm, the quality of fixed carbon in semi-coke>70%, semi-coke granularity is 3～8mm；Limestone is divided into powdery
Limestone and block limestone, the granularity of powdered lime stone is 1～5mm, and the granularity of block limestone is 8～16mm；
B, grinding magnetic concentration
Iron ore is ground, and grinding particle size is 200 mesh, and magnetic concentration makes the Iron grade of iron mine more than 40%；
C, join pelletizing material
Enrichment iron mine, bentonite and Borax are carried out mix by weight 100:2.5～3.0:0.6～0.9；
D, mixed material profit mill
Mixed material is poured in damp mill, and profit time consuming is 8～10min；
E, profit grind materials pelletizing
Profit grind materials being conveyed into pelletizer, makes it moisten profit grind materials water spray, pelletizer work will profit grind materials rolling
Become green-ball；
F, green-ball sieve
Using round roller sieve to screen qualified green-ball, the granularity of qualified green-ball is 8～16mm, and the green-ball screened out is beaten through beater
Step E pelletizing again is returned after Saning；
G, green-ball be dried
Qualified green-ball is sent in grate and is dried, and is passed through the flue gas of 350～650 DEG C in grate, and drying time is controlled
Being made as 20～30min, flue gas flow velocity in grate is 2～3m/s, and it is 150～250 DEG C that the baking temperature of green-ball controls；
H, green-ball reduction roasting
Dried green-ball, limestone, semi-coke are carried out dispensing by weight 100:10～20:15～30；To give birth to after drying
Ball, block limestone and semi-coke mix homogeneously, mixed material is in the funnel feeding rotary kiln of kiln tail, and mixed material is in kiln
Carrying out roasting, the sintering temperature of mixed material is 1050～1200 DEG C, and the recovery time is 30～60min；It is thrown into powdery from kiln hood
Limestone reacts with hot mixture material；
I, material cool down
Hot mixture material, after kiln hood is discharged, carries out anaerobic cooling in vertical gasifier, and cooling medium uses
Blast furnace gas, discharges from cooler when high-temperature material is cooled to below 200～300 DEG C；
J, material dry separation
Material after cooling, after magnetic pulley dry separation, can get magnetic material and non-magnetic material；
K, magnetic material process
Magnetic material is through wet separation and is ground, and grinding particle size is 200 mesh, obtains the iron powder that metallizes.
L, the process of non-magnetic material
Being sieved by non-magnetic material in step J, mesh size is 5mm, screens out lump lime and powder, powder
Comprising semi-coke, quick lime and ash, powder selects unreacted semi-coke through selecting crude drugs with winnower again, unreacted semi-coke granularity be 2mm ~
5mm, unreacted semi-coke uses as rotary kiln returning charge；Containing powdery quick lime and fine powder in residue powder, powdery is raw
Calx granularity is 2mm ~ 5mm, and powder particle size is 0.2mm ~ 2mm, and powdery quick lime and fine powder use as sintered material.
In described step K, metallization iron powder and coal dust being hot pressed into iron mine carbonaceous pelletizing, iron mine carbonaceous pelletizing is in blast furnace
Molten steel is prepared in reaction.
Embodiment 1
A, material choice
Iron ore granularity<2mm, the quality of fixed carbon in semi-coke>70%, semi-coke granularity is 3～8mm；Limestone is divided into powdery
Limestone and block limestone, the granularity of powdered lime stone is 1～5mm, and the granularity of block limestone is 8～16mm；
B, grinding magnetic concentration
Iron ore is ground, and grinding particle size is 200 mesh, and magnetic concentration makes the Iron grade of iron mine more than 40%；
C, join pelletizing material
Enrichment iron mine, bentonite and Borax are carried out mix by weight 100:2.5:0.6；
D, mixed material profit mill
Mixed material is poured in damp mill, and profit time consuming is 8～10min；
E, profit grind materials pelletizing
Profit grind materials being conveyed into pelletizer, makes it moisten profit grind materials water spray, pelletizer work will profit grind materials rolling
Become green-ball；
F, green-ball sieve
Using round roller sieve to screen qualified green-ball, the granularity of qualified green-ball is 8～16mm, and the green-ball screened out is beaten through beater
Step E pelletizing again is returned after Saning；
G, green-ball be dried
Qualified green-ball is sent in grate and is dried, and is passed through the flue gas of 350～650 DEG C in grate, and drying time is controlled
Being made as 20～30min, flue gas flow velocity in grate is 2～3m/s, and it is 150～250 DEG C that the baking temperature of green-ball controls；
H, green-ball reduction roasting
Dried green-ball, limestone, semi-coke are carried out dispensing by weight 100:10:15；By dried green-ball, block stone
Lime stone and semi-coke mix homogeneously, mixed material sends in rotary kiln through the funnel of kiln tail, and mixed material carries out roasting in kiln,
The sintering temperature of mixed material is 1050～1200 DEG C, and the recovery time is 30～60min；It is thrown into powdered lime stone with high from kiln hood
Temperature mixed material reacts；
I, material cool down
Hot mixture material, after kiln hood is discharged, carries out anaerobic cooling in vertical gasifier, and cooling medium uses
Blast furnace gas, discharges from cooler when high-temperature material is cooled to below 200～300 DEG C；
J, material dry separation
Material after cooling, after magnetic pulley dry separation, can get magnetic material and non-magnetic material；
K, magnetic material process
Magnetic material is through wet separation and is ground, and grinding particle size is 200 mesh, obtains the iron powder that metallizes.
L, the process of non-magnetic material
Being sieved by non-magnetic material in step J, mesh size is 5mm, screens out lump lime and powder, powder
Comprising semi-coke, quick lime and ash, powder selects unreacted semi-coke through selecting crude drugs with winnower again, unreacted semi-coke granularity be 2mm ~
5mm, unreacted semi-coke uses as rotary kiln returning charge；Containing powdery quick lime and fine powder in residue powder, powdery is raw
Calx granularity is 2mm ~ 5mm, and powder particle size is 0.2mm ~ 2mm, and powdery quick lime and fine powder use as sintered material.
Embodiment 2
A, material choice
Iron ore granularity<2mm, the quality of fixed carbon in semi-coke>70%, semi-coke granularity is 3～8mm；Limestone is divided into powdery
Limestone and block limestone, the granularity of powdered lime stone is 1～5mm, and the granularity of block limestone is 8～16mm；
B, grinding magnetic concentration
Iron ore is ground, and grinding particle size is 200 mesh, and magnetic concentration makes the Iron grade of iron mine more than 40%；
C, join pelletizing material
Enrichment iron mine, bentonite and Borax are carried out mix by weight 100:3.0:0.9；
D, mixed material profit mill
Mixed material is poured in damp mill, and profit time consuming is 8～10min；
E, profit grind materials pelletizing
Profit grind materials being conveyed into pelletizer, makes it moisten profit grind materials water spray, pelletizer work will profit grind materials rolling
Become green-ball；
F, green-ball sieve
Using round roller sieve to screen qualified green-ball, the granularity of qualified green-ball is 8～16mm, and the green-ball screened out is beaten through beater
Step E pelletizing again is returned after Saning；
G, green-ball be dried
Qualified green-ball is sent in grate and is dried, and is passed through the flue gas of 350～650 DEG C in grate, and drying time is controlled
Being made as 20～30min, flue gas flow velocity in grate is 2～3m/s, and it is 150～250 DEG C that the baking temperature of green-ball controls；
H, green-ball reduction roasting
Dried green-ball, limestone, semi-coke are carried out dispensing by weight 100:20:30；By dried green-ball, bulk
Limestone and semi-coke mix homogeneously, mixed material is in the funnel feeding rotary kiln of kiln tail, and the carrying out in kiln roasts mixed material
Burning, the sintering temperature of mixed material is 1050～1200 DEG C, and the recovery time is 30～60min；It is thrown into powdered lime stone from kiln hood
React with hot mixture material；
I, material cool down
Hot mixture material, after kiln hood is discharged, carries out anaerobic cooling in vertical gasifier, and cooling medium uses
Blast furnace gas, discharges from cooler when high-temperature material is cooled to below 200～300 DEG C；
J, material dry separation
Material after cooling, after magnetic pulley dry separation, can get magnetic material and non-magnetic material；
K, magnetic material process
Magnetic material is through wet separation and is ground, and grinding particle size is 200 mesh, obtains the iron powder that metallizes.
L, the process of non-magnetic material
Being sieved by non-magnetic material in step J, mesh size is 5mm, screens out lump lime and powder, powder
Comprising semi-coke, quick lime and ash, powder selects unreacted semi-coke through selecting crude drugs with winnower again, unreacted semi-coke granularity be 2mm ~
5mm, unreacted semi-coke uses as rotary kiln returning charge；Containing powdery quick lime and fine powder in residue powder, powdery is raw
Calx granularity is 2mm ~ 5mm, and powder particle size is 0.2mm ~ 2mm, and powdery quick lime and fine powder use as sintered material.
Embodiment 3
A, material choice
Iron ore granularity<2mm, the quality of fixed carbon in semi-coke>70%, semi-coke granularity is 3～8mm；Limestone is divided into powdery
Limestone and block limestone, the granularity of powdered lime stone is 1～5mm, and the granularity of block limestone is 8～16mm；
B, grinding magnetic concentration
Iron ore is ground, and grinding particle size is 200 mesh, and magnetic concentration makes the Iron grade of iron mine more than 40%；
C, join pelletizing material
Enrichment iron mine, bentonite and Borax are carried out mix by weight 100:2.8:0.8；
D, mixed material profit mill
Mixed material is poured in damp mill, and profit time consuming is 8～10min；
E, profit grind materials pelletizing
Profit grind materials being conveyed into pelletizer, makes it moisten profit grind materials water spray, pelletizer work will profit grind materials rolling
Become green-ball；
F, green-ball sieve
Using round roller sieve to screen qualified green-ball, the granularity of qualified green-ball is 8～16mm, and the green-ball screened out is beaten through beater
Step E pelletizing again is returned after Saning；
G, green-ball be dried
Qualified green-ball is sent in grate and is dried, and is passed through the flue gas of 350～650 DEG C in grate, and drying time is controlled
Being made as 20～30min, flue gas flow velocity in grate is 2～3m/s, and it is 150～250 DEG C that the baking temperature of green-ball controls；
H, green-ball reduction roasting
Dried green-ball, limestone, semi-coke are carried out dispensing by weight 100:15:20；By dried green-ball, block stone
Lime stone and semi-coke mix homogeneously, mixed material sends in rotary kiln through the funnel of kiln tail, and mixed material carries out roasting in kiln,
The sintering temperature of mixed material is 1050～1200 DEG C, and the recovery time is 30～60min；It is thrown into powdered lime stone with high from kiln hood
Temperature mixed material reacts；
I, material cool down
Hot mixture material, after kiln hood is discharged, carries out anaerobic cooling in vertical gasifier, and cooling medium uses
Blast furnace gas, discharges from cooler when high-temperature material is cooled to below 200～300 DEG C；
J, material dry separation
Material after cooling, after magnetic pulley dry separation, can get magnetic material and non-magnetic material；
K, magnetic material process
Magnetic material is through wet separation and is ground, and grinding particle size is 200 mesh, obtains the iron powder that metallizes.
L, the process of non-magnetic material
Being sieved by non-magnetic material in step J, mesh size is 5mm, screens out lump lime and powder, powder
Comprising semi-coke, quick lime and ash, powder selects unreacted semi-coke through selecting crude drugs with winnower again, unreacted semi-coke granularity be 2mm ~
5mm, unreacted semi-coke uses as rotary kiln returning charge；Containing powdery quick lime and fine powder in residue powder, powdery is raw
Calx granularity is 2mm ~ 5mm, and powder particle size is 0.2mm ~ 2mm, and powdery quick lime and fine powder use as sintered material.
Embodiments of the invention all select high silicon refractory iron ore, and embodiment 1 is through reaction available degree of metalization 91%, ferrum
The metallization iron powder of grade 81%, embodiment 2 is through reaction available degree of metalization 91%, the metallization iron powder of Iron grade 81%, real
Execute example 3 through reaction available degree of metalization 93%, the metallization iron powder of Iron grade 83%.Height is can be seen that by above-described embodiment
Silicon refractory iron ore is effectively utilized, and can promote the use of.
Claims (3)
1. powdered iron Ore Carbon cycle oxygen supplement direct-reduction produces metallization iron powder method, it is characterised in that specifically comprise the following steps that
A, material choice
Iron ore granularity<2mm, the quality of fixed carbon in semi-coke>70%, semi-coke granularity is 3～8mm；Limestone is divided into powdered lime
Stone and block limestone, the granularity of powdered lime stone is 1～5mm, and the granularity of block limestone is 8～16mm；
B, grinding magnetic concentration
Iron ore is ground, and grinding particle size is 200 mesh, and magnetic concentration makes the Iron grade of iron mine more than 40%；
C, join pelletizing material
Enrichment iron mine, bentonite and Borax are carried out mix by weight 100:2.5～3.0:0.6～0.9；
D, mixed material profit mill
Mixed material is poured in damp mill, and profit time consuming is 8～10min；
E, profit grind materials pelletizing
Profit grind materials being conveyed into pelletizer, makes it moisten profit grind materials water spray, profit grind materials is rolled into life by pelletizer work
Ball；
F, green-ball sieve
Using round roller sieve to screen qualified green-ball, the granularity of qualified green-ball is 8～16mm, and the green-ball screened out is after beater is broken up
Return step E pelletizing again；
G, green-ball be dried
Qualified green-ball is sent in grate and is dried, and is passed through the flue gas of 350～650 DEG C in grate, and drying time, control was
20～30min, flue gas flow velocity in grate is 2～3m/s, and it is 150～250 DEG C that the baking temperature of green-ball controls；
H, green-ball reduction roasting
Dried green-ball, limestone, semi-coke are carried out dispensing by weight 100:10～20:15～30；
By dried green-ball, block limestone and semi-coke mix homogeneously, mixed material is sent in rotary kiln through the funnel of kiln tail, mixed
Compound material carries out roasting in kiln, and the sintering temperature of mixed material is 1050～1200 DEG C, and the recovery time is 30～60min；
It is thrown into powdered lime stone from kiln hood to react with hot mixture material；
I, material cool down
Hot mixture material, after kiln hood is discharged, carries out anaerobic cooling in vertical gasifier, and cooling medium uses blast furnace
Coal gas, discharges from cooler when high-temperature material is cooled to below 200～300 DEG C；
J, material dry separation
Material after cooling, after magnetic pulley dry separation, can get magnetic material and non-magnetic material；
K, magnetic material process
Magnetic material is through wet separation and is ground, and grinding particle size is 200 mesh, obtains the iron powder that metallizes.
Powdered iron Ore Carbon cycle oxygen supplement the most according to claim 1 direct-reduction produces metallization iron powder method, and it is special
Levy and be also to include:
L, the process of non-magnetic material
Being sieved by non-magnetic material in step J, mesh size is 5mm, screens out lump lime and powder, and powder comprises
Semi-coke, quick lime and ash, powder selects unreacted semi-coke through selecting crude drugs with winnower again, and unreacted semi-coke is entered as rotary kiln returning charge
Exercise and use；Containing powdery quick lime and fine powder in residue powder, powdery quick lime and fine powder use as sintered material；
Described powder selects unreacted semi-coke through selecting crude drugs with winnower, and unreacted semi-coke granularity is 2mm ~ 5mm, and unreacted semi-coke is made
Use for rotary kiln returning charge；Containing powdery quick lime and fine powder in residue powder, powdery quick lime granularity is 2mm ~ 5mm,
Powder particle size is 0.2mm ~ 2mm, and powdery quick lime and fine powder use as sintered material.
Powdered iron Ore Carbon cycle oxygen supplement the most according to claim 1 direct-reduction produces metallization iron powder method, and it is special
Levying and be in described step K to be hot pressed into metallization iron powder and coal dust iron mine carbonaceous pelletizing, iron mine carbonaceous pelletizing is anti-in blast furnace
Molten steel should be prepared.
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| CN107262731B (en) * | 2017-06-14 | 2019-06-21 | 唐竹胜 | Stocking/component of machine product method is forged in a kind of powdery iron ore direct reduced iron hot pressing |
| CN108676940A (en) * | 2018-06-20 | 2018-10-19 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of sinter mixture and preparation method thereof |
| CN111809044A (en) * | 2020-07-27 | 2020-10-23 | 北京科技大学 | Multi-source complex low-grade iron ore resource utilization method and high-quality composite iron-making furnace burden |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205561A (en) * | 2013-03-18 | 2013-07-17 | 酒泉钢铁(集团)有限责任公司 | Coal-based magnetic roasting method for powdery refractory low-grade iron ore carbon-bearing pellets by pellet shaft furnace |
-
2014
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205561A (en) * | 2013-03-18 | 2013-07-17 | 酒泉钢铁(集团)有限责任公司 | Coal-based magnetic roasting method for powdery refractory low-grade iron ore carbon-bearing pellets by pellet shaft furnace |
Non-Patent Citations (2)
| Title |
|---|
| 回转窑一步法直接还原铁生产的试验研究;路朝晖等;《钢铁研究学报》;20110531;第23卷(第5期);第11-14页 * |
| 铁矿直接还原工艺及理论的研究现状及进展;徐承焱等;《矿产保护与利用》;20100831(第4期);第48-52页 * |
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