CN106011460A - Method for preparing sinter through high-sulfur iron ore concentrate - Google Patents
Method for preparing sinter through high-sulfur iron ore concentrate Download PDFInfo
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- CN106011460A CN106011460A CN201610560148.XA CN201610560148A CN106011460A CN 106011460 A CN106011460 A CN 106011460A CN 201610560148 A CN201610560148 A CN 201610560148A CN 106011460 A CN106011460 A CN 106011460A
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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
- C22B1/22—Sintering; Agglomerating in other sintering apparatus
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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
- C22B1/02—Roasting processes
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Abstract
The invention discloses a method for preparing sinter through a high-sulfur iron ore concentrate. The method comprises the following steps that firstly, after the high-sulfur iron ore concentrate and pulverized coal are evenly mixed according to the mass ratio of 94-100:0-6, an obtained mixture is arranged in a rotation pipe, the temperature is controlled to range from 700 DEG C to 800 DEG C, and the reaction is conducted for 10 min to 35 min; secondly, when a reactant with the granularity smaller than 0.074 mm is obtained by grinding a reactant obtained through treatment in the first step and accounts for 80% or above of the total reactant mass, grinding treatment is stopped, and an initial high-sulfur iron ore concentrate is obtained; and thirdly, the obtained high-sulfur iron ore concentrate is sintered according to a sinter treatment manner, and the sinter is obtained. The method is high in desulfuration efficiency, the high-sulfur iron ore concentrate is treated through the combination of pretreatment and sintering, and the desulfuration efficiency reaches up to 90% or above; and the desulfuration treatment cost of the method is low, and the influence on the iron ore concentrate grade is small.
Description
Technical field
The present invention relates to a kind of field of steel metallurgy, be specifically related to one and utilize iron concentrate containing high sulphur to prepare sintering deposit
Method.
Background technology
Sulfur can make steel produce red brittleness, produces fracture, therefore sulfur in steel when making steel at high temperature forge and roll
Content typically must not exceed 0.05%, and this just requires that the sulfur content in the iron ore concentrate of steel-making can not be the highest.
High sulfide pyrite is distributed extensively in China, stock number big, but because it contains higher sulfur, can be tight
Ghost image rings molten steel quality, increases subsequent treatment cost, and many iron and steel enterprises purchasing price of all having to is more expensive
Low troilite, makes high sulfide pyrite become " chicken ribs " in many areas, the low vulcanizing treatment gesture to high sulfide pyrite
Must go.
Chinese patent application CN201110179774.1 " high sulfide pyrite pellet reinforced roasting consolidation technology " is open
Iron concentrate containing high sulphur is used for pelletizing production, and this technique not only needs to carry out original grate kiln technique
Transformation, extends drying grate length for desulfurization, and needs changing more high temperature resistant rotary kiln burner and resistance to
Fire material, so that kiln body adapts to carry out desulfurization higher than the sintering temperature in common ore deposit for the decomposition of sulfate.
Therefore, the method for prior art high iron concentrate is used for pellet produce to guarantee to produce qualified ball
Nodulizing, required cost relatively uses common concentrate to raise.
For iron and steel enterprise, low price, aboundresources iron ore are very good raw materials, if can solve
The problem that certainly high-sulfur ore deposit sulfur-bearing is high, then high-sulfur ore deposit also will become a kind of desirable feedstock.
Summary of the invention
[solving the technical problem that]
Present invention aim to address above-mentioned prior art problem, it is provided that one utilizes iron concentrate containing high sulphur preparation to burn
The method in knot ore deposit.
[technical scheme]
In order to reach above-mentioned technique effect, the present invention takes techniques below scheme:
Sulfur in high sulfide pyrite is mainly presented in Iron sulfuret. (FeS), in the oxidisability of ＞ 700 DEG C
Under the conditions of, FeS is easily decomposed to form SO2And Fe3+, SO2Volatilized by flue gas, so can significantly drop
Sulfur content in low high sulfide pyrite, the iron ore concentrate after by pretreatment is sintered, and the sintering deposit obtained is relatively
Directly use the sintering deposit with the iron concentrate containing high sulphur not carrying out pretreatment as raw material production low many.
A kind of method utilizing iron concentrate containing high sulphur to prepare sintering deposit, it comprises the following steps:
(1) by iron concentrate containing high sulphur and coal dust be in mass ratio 94～100:0～6 mix homogeneously after, obtain
Compound is placed in return bend, and controlling temperature is 700～800 DEG C, reacts 10～35min；
(2) reactant obtained through step (1) process is ground to the granularity reactant less than 0.074mm account for
Total reactant quality more than 80% time, stop milled processed, obtain iron concentrate containing high sulphur first product；
(3) iron concentrate containing high sulphur obtained is sintered according to the processing mode of sintering deposit, obtains sintering deposit.
According to the present invention further technical scheme, in step (1), described mix homogeneously refers to height
After sulfur iron ore concentrate and coal dust are mixed in proportion, put into the rotating speed mixing with 8～12rpm in cylindrical mixer
5～8min.
According to the present invention further technical scheme, in step (2), described grinding is at ball mill
Middle grinding 10～20min.
According to the present invention further technical scheme, in step (3), the described process according to sintering deposit
Mode refer to by iron concentrate containing high sulphur first product, middle grade fine ore, high-grade fine ore, limestone, activity grey, burnt
Powder is 60～62:4～5:16 according to mass ratio～after 18:7～9:4～5:4～5 mix homogeneously, controls
In compound, moisture is 7%；Then carrying out secondary mixing, controlling mixture moisture is 7.5%；After mixing,
The compound obtained is placed in sintered cup, firing temperature be 1100～1200 DEG C, the duration of ignition be 1.5～
3min, igniting negative pressure are 6.5～7kPa, sintering suction pressure is to carry out under conditions of 14～15kPa burning
Knot, obtains sintering deposit.
According to a preferred embodiment of the invention, described iron concentrate containing high sulphur first product, middle grade fine ore, height
Grade fine ore, limestone, activity ash, coke powder are 62:4:17:7:5:5 according to mass ratio.
According to a preferred embodiment of the invention, the reaction condition of described igniting sintering is that firing temperature is
1150 DEG C, the duration of ignition be 2.5min, igniting negative pressure be 7kPa, sintering suction pressure be 15kPa.
According to the present invention further technical scheme, described middle grade fine ore includes following weight/mass percentage composition
Composition: 53.5～the TFe of 54.0%, 17.0～the SiO of 18.0%2, 2.0～the CaO of 3.0%, 0.05～
The S of 0.10%；In described middle grade fine ore, the granularity middle grade fine ore less than 3mm accounts for total middle grade fine ore matter
More than the 90% of amount.
According to the present invention further technical scheme, described high-grade fine ore includes following weight/mass percentage composition
Composition: 58.5～the TFe of 59.5%, the FeO of more than 20%, 8.0～the SiO of 9.0%2, 2.5～3.0%
CaO, the S of less than 0.5%；In described middle grade fine ore, the granularity middle grade fine ore less than 0.074mm accounts for
More than the 80% of total middle grade fine ore quality.
Will be described in detail the present invention below.
Sulfur in high sulfide pyrite is mainly presented in Iron sulfuret. (FeS) in iron ore concentrate, by high-sulfur
Iron ore concentrate carries out calcination process beforehand through with coal blending, under the sintering temperature of 700～800 DEG C, and major part
FeS meeting and O2Reaction generates SO2, and Fe2+Fe can be become3+, the purpose allocating coal dust into is to improve reaction
Temperature, accelerates reaction and carries out, and the flue gas of enrichment is accessed desulphurization plant, by the high iron concentrate after processing
Can be sintered as common iron ore concentrate.
The present invention i.e. at 700～800 DEG C, is placed in return bend after reacting 10～35min through pretreatment,
Grind the iron concentrate containing high sulphur first product that obtains and include the composition of following weight/mass percentage composition: 53.5～the TFe of 54.0%,
The FeO of more than 30%, 3.5～the SiO of 4.0%2, 0.9～the CaO of 1.0%, 0.05～the S of 0.10%；Institute
State the middle grade fine ore less than 0.074mm of granularity in grade fine ore account for total in grade fine ore quality 80% with
On.In the coal dust that the present invention uses, the weight/mass percentage composition of ash is 12～15%, CGuWeight/mass percentage composition
For more than 70%；The granularity of described coal dust is less than 3mm.Wherein, described TFe is the total amount of Fe.
In the preparation process of the present invention, by the adjustment to return bend rotating speed and inclination angle, compound can be controlled
The time of staying in return bend, roasting time.
In the preparation process of the present invention, the flue gas that in return bend, roasting obtains can be collected processing, with
Avoid SO2Pollution to environment.
Pretreatment in the present invention need not add desulfurizing agent, it is only necessary to adding a small amount of coal dust, processing cost is low,
Time more than 400 DEG C, the volatile matter in coal dust is left by flue gas, affects little on the grade of iron ore concentrate.
[beneficial effect]
The present invention compared with prior art, has a following beneficial effect:
The method removing itself more than 90% that iron concentrate containing high sulphur can be passed through pretreatment, re-sinter by the present invention
Sulfur content, it is former for making to utilize the sintering deposit sulfur content that iron concentrate containing high sulphur is raw material production to reach with common iron ore concentrate
The level of the sintering deposit that material produces.
The efficiency of the method desulfurization of the present invention is high, uses pretreatment to combine and utilizes iron concentrate containing high sulphur at sintering, de-
Sulphur efficiency is up to more than 90%；And the desulfurization processing cost of the present invention is low, little on iron concentrate grade impact.
Detailed description of the invention
Below in conjunction with embodiments of the invention, the invention will be further elaborated.
In following embodiment, ω is expressed as weight/mass percentage composition, and R is the basicity of sintering deposit；Following embodiment institute
The device parameter needed is as follows:
Cylindrical mixer specification isIt is about 2m, rotating speed and mixing time adjustable；
Return bend specification isBeing about 7m, rotating speed, tilt adjustable, maximum temperature is more than 800 DEG C；
Sintered cup specification isHigh about 800mm.
Embodiment 1:
By the coal dust of the iron concentrate containing high sulphur of percentage by weight 95% and percentage by weight 5% at above-mentioned cylinder mixing
Machine mixes with 10rpm rotating speed, mixing time 5min, then is placed in by compound in above-mentioned return bend,
Control return bend temperature 800 DEG C, during by rotating speed and tilt adjustment are controlled compound roasting in return bend
Between 10min, then concentrate complete for roasting is placed in ball mill and is ground, make iron concentrate containing high sulphur after grinding
First product ω (granularity be less than 0.074mm) ＞ 80% pours out, according to iron concentrate containing high sulphur first product, middle grade fine ore,
High-grade fine ore, limestone, activity ash, coke powder are that 62:4:17:7:5:5 sintering is joined according to mass ratio
Material, mixes in batch mixer flexible for compound, and the moisture controlled in compound is 7.0%, and incorporation time is
4min, then the material through mixing is carried out secondary mixing, controlling mixture moisture is 7.5%, will mix
The compound become be placed in sintered cup (the first cloth of 3Kg grate-layer material sintering deposit bottom sintered cup, thickness about 25～
35mm), thickness of feed layer is 600mm, and binder peace material all in one piece face, sets firing temperature as 1150 DEG C, point
The fire time is 2.5min, and igniting negative pressure is 7kPa, and sintering suction pressure is 15kPa, carries out igniting sintering.
Sintering process after terminating sintering deposit is cooled to less than 300 DEG C carry out the most broken after by 40～25mm, 25～
16mm, 16～10mm, 10～5mm, ＜ 5mm sieve respectively, finally calculate granularity ＞ 5mm's
Ratio (yield rate) shared by sintering deposit, and according to GB GB3209 canonical measure sintered ore rotary drum strength.
The analysis result of the sintering deposit that the present embodiment obtains is as follows: obtaining R is 1.84, and TFe grade is 49.1%,
The sintering deposit of sulfur content 0.036%, its tumbler index is 73.18%, and sintering finished rate is 78.68%.
Embodiment 2
By the coal dust of the iron concentrate containing high sulphur of percentage by weight 98% and percentage by weight 2% at above-mentioned cylinder mixing
Machine mixes with 10rpm rotating speed, mixing time 5min, then is placed in by compound in above-mentioned return bend,
Control return bend temperature 800 DEG C, during by rotating speed and tilt adjustment are controlled compound roasting in return bend
Between 10min, then concentrate complete for roasting is placed in ball mill and is ground, make iron concentrate containing high sulphur after grinding
First product ω (granularity is less than 0.074mm) ＞ 80% pours out, according to iron concentrate containing high sulphur first product, middle grade fine ore, height
Grade fine ore, limestone, activity ash, coke powder are 61:5:16:8:5:5 sintered material according to mass ratio,
Mixing in batch mixer flexible for compound, the moisture controlled in compound is 7.0%, and incorporation time is 4min,
Again the material through mixing being carried out secondary mixing, controlling mixture moisture is 7.5%, and mixing completed is mixed
Close material be placed in sintered cup (the first cloth of 3Kg grate-layer material sintering deposit bottom sintered cup, thickness about 25～
35mm), thickness of feed layer is 600mm, and binder peace material all in one piece face, sets firing temperature as 1130 DEG C, point
The fire time is 2.4min, and igniting negative pressure is 7kPa, and sintering suction pressure is 15kPa, carries out igniting sintering.
Sintering process after terminating sintering deposit is cooled to less than 300 DEG C carry out the most broken after by 40～25mm, 25～
16mm, 16～10mm, 10～5mm, ＜ 5mm sieve respectively, finally calculate granularity ＞ 5mm's
Ratio (yield rate) shared by sintering deposit, and according to GB GB3209 canonical measure sintered ore rotary drum strength.
The analysis result of the sintering deposit that the present embodiment obtains is as follows: obtaining R is 1.84, and TFe grade is 49.1%,
The sintering deposit of sulfur content 0.063%, its tumbler index is 73.41%, and sintering finished rate is 78.57%.
Embodiment 3
The iron concentrate containing high sulphur of percentage by weight 100% is mixed with 10rpm rotating speed at above-mentioned cylindrical mixer
Close, mixing time 5min, then compound be placed in above-mentioned return bend, control return bend temperature 800 DEG C,
By rotating speed and tilt adjustment are controlled compound roasting time 30min in return bend, then that roasting is complete
The concentrate finished is placed in ball mill and is ground, and after making grinding, (granularity is less than iron concentrate containing high sulphur first product ω
0.074mm) ＞ 80% pours out, according to iron concentrate containing high sulphur first product, middle grade fine ore, high-grade fine ore, Calx
Stone, activity ash, coke powder are 62:4:17:7:5:5 sintered material according to mass ratio, for compound circle
Mixing in logical batch mixer, the moisture controlled in compound is 7.0%, and incorporation time is 4min, then will be through overmulling
Even material carries out secondary mixing, and controlling mixture moisture is 7.5%, and compound mixing completed is placed in burning
In knot cup (the first cloth of 3Kg grate-layer material sintering deposit bottom sintered cup, thickness about 25～35mm), the bed of material is thick
Degree is for 600mm, and binder peace material all in one piece face, sets firing temperature as 1150 DEG C, and the duration of ignition is 2.5min,
Igniting negative pressure is 7kPa, and sintering suction pressure is 15kPa, carries out igniting sintering.
Sintering process after terminating sintering deposit is cooled to less than 300 DEG C carry out the most broken after by 40～25mm, 25～
16mm, 16～10mm, 10～5mm, ＜ 5mm sieve respectively, finally calculate granularity ＞ 5mm's
Ratio (yield rate) shared by sintering deposit, and according to GB GB3209 canonical measure sintered ore rotary drum strength.
The analysis result of the sintering deposit that the present embodiment obtains is as follows: obtaining R is 1.84, and TFe grade is 49.1%,
The sintering deposit of sulfur content 0.066%, its tumbler index is 73.28%, and sintering finished rate is 78.64%.
Embodiment 4
By the coal dust of the iron concentrate containing high sulphur of percentage by weight 98% and percentage by weight 2% at above-mentioned cylinder mixing
Machine mixes with 10rpm rotating speed, mixing time 5min, then is placed in by compound in above-mentioned return bend,
Control return bend temperature 800 DEG C, during by rotating speed and tilt adjustment are controlled compound roasting in return bend
Between 30min, then concentrate complete for roasting is placed in ball mill and is ground, make iron concentrate containing high sulphur after grinding
First product ω (granularity is less than 0.074mm) ＞ 80% pours out, according to iron concentrate containing high sulphur first product, middle grade fine ore, height
Grade fine ore, limestone, activity ash, coke powder are 62:4:17:7:5:5 sintered material according to mass ratio,
Mixing in batch mixer flexible for compound, the moisture controlled in compound is 7.0%, and incorporation time is 4min,
Again the material through mixing being carried out secondary mixing, controlling mixture moisture is 7.5%, and mixing completed is mixed
Close material be placed in sintered cup (the first cloth of 3Kg grate-layer material sintering deposit bottom sintered cup, thickness about 25～
35mm), thickness of feed layer is 600mm, and binder peace material all in one piece face, sets firing temperature as 1150 DEG C, point
The fire time is 2.5min, and igniting negative pressure is 7kPa, and sintering suction pressure is 15kPa, carries out igniting sintering.
Sintering process after terminating sintering deposit is cooled to less than 300 DEG C carry out the most broken after by 40～25mm, 25～
16mm, 16～10mm, 10～5mm, ＜ 5mm sieve respectively, finally calculate granularity ＞ 5mm's
Ratio (yield rate) shared by sintering deposit, and according to GB GB3209 canonical measure sintered ore rotary drum strength.
The analysis result of the sintering deposit that the present embodiment obtains is as follows: obtaining R is 1.84, and TFe grade is 49.1%,
The sintering deposit of sulfur content 0.065%, its tumbler index is 73.39%, and sintering finished rate is 78.56%.
Comparative example 1
According to iron concentrate containing high sulphur, middle grade fine ore, high-grade fine ore, limestone, activity ash, coke powder according to
Mass ratio is 62:4:17:7:5:5 sintered material, mixes in batch mixer flexible for compound, controls
Moisture in compound is 7.0%, and incorporation time is 4min, then will carry out secondary mixing through the material of mixing,
Controlling mixture moisture is 7.5%, and compound mixing completed is placed in sintered cup (3Kg grate-layer material sintering
The first cloth in ore deposit bottom sintered cup, thickness about 25～35mm), thickness of feed layer is 600mm, and binder peace
Material all in one piece face, sets firing temperature as 1150 DEG C, and the duration of ignition is 2.5min, and igniting negative pressure is 7kPa, sintering
Suction pressure is 15kPa, carries out igniting sintering.
Sintering process after terminating sintering deposit is cooled to less than 300 DEG C carry out the most broken after by 40～25mm, 25～
16mm, 16～10mm, 10～5mm, ＜ 5mm sieve respectively, finally calculate granularity ＞ 5mm's
Ratio (yield rate) shared by sintering deposit, and according to GB GB3209 canonical measure sintered ore rotary drum strength.
The analysis result of the sintering deposit that the present embodiment obtains is as follows: obtaining R is 1.84, and TFe grade is 49.1%,
The sintering deposit of sulfur content 0.072%, its tumbler index is 73.24%, and sintering finished rate is 78.62%.
In sum, the sintering deposit sulfur content that the preparation method of the present invention prepares is decreased obviously, this
Bright desulfuration efficiency is preferable, and the present invention in the preprocessing process of desulfurization without desulfurizing agent, it is only necessary to add
Entering a small amount of coal dust, or be added without coal dust, processing cost is low, and to the grade of iron ore concentrate under the influence of.
Although reference be made herein to invention has been described for the explanatory embodiment of the present invention, and above-described embodiment is only
For the present invention preferably embodiment, embodiments of the present invention are also not restricted to the described embodiments, it should
Understanding, those skilled in the art can be designed that a lot of other amendments and embodiment, and these are revised and real
The mode of executing will fall within spirit disclosed in the present application and spirit.
Claims (8)
1. one kind utilizes the method that iron concentrate containing high sulphur prepares sintering deposit, it is characterised in that it comprises the following steps:
(1) by iron concentrate containing high sulphur and coal dust be in mass ratio 94～100:0～6 mix homogeneously after, obtain
Compound is placed in return bend, and controlling temperature is 700～800 DEG C, reacts 10～35min；
(2) it is ground to the granularity reactant less than 0.074mm by processing, through step (1), the reactant obtained
When accounting for more than the 80% of total reactant quality, stop milled processed, obtain iron concentrate containing high sulphur first product；
(3) iron concentrate containing high sulphur obtained is sintered according to the processing mode of sintering deposit, obtains sintering deposit.
The method utilizing iron concentrate containing high sulphur to prepare sintering deposit the most according to claim 1, it is characterised in that
In step (1), after described mix homogeneously refers to be mixed in proportion iron concentrate containing high sulphur and coal dust, put
Enter the rotating speed mixing 5～8min with 8～12rpm in cylindrical mixer.
The method utilizing iron concentrate containing high sulphur to prepare sintering deposit the most according to claim 1, it is characterised in that
In step (2), described grinding is in grinding in ball grinder 10～20min.
The method utilizing iron concentrate containing high sulphur to prepare sintering deposit the most according to claim 1, it is characterised in that
In step (3), described refer to iron concentrate containing high sulphur first product, middle grade according to the processing mode of sintering deposit
Fine ore, high-grade fine ore, limestone, activity ash, coke powder are 60～62:4～5 according to mass ratio:
16～18:7～9:4～5:4～5 mix homogeneously after, controlling moisture in compound is 7%；Then
Carrying out secondary mixing, controlling mixture moisture is 7.5%；After mixing, the compound obtained is put
In sintered cup, firing temperature be 1100～1200 DEG C, the duration of ignition be 1.5～3min, igniting
Negative pressure is 6.5～7kPa, sintering suction pressure is to carry out igniting sintering under conditions of 14～15kPa,
To sintering deposit.
The method utilizing iron concentrate containing high sulphur to prepare sintering deposit the most according to claim 4, it is characterised in that institute
State iron concentrate containing high sulphur first product, middle grade fine ore, high-grade fine ore, limestone, activity ash, coke powder by
It is 62:4:17:7:5:5 according to mass ratio.
The method utilizing iron concentrate containing high sulphur to prepare sintering deposit the most according to claim 4, it is characterised in that institute
State the reaction condition of igniting sintering be firing temperature be 1150 DEG C, the duration of ignition be 2.5min, igniting negative
Pressure is 15kPa for 7kPa, sintering suction pressure.
The method utilizing iron concentrate containing high sulphur to prepare sintering deposit the most according to claim 4, it is characterised in that institute
State middle grade fine ore and include the composition of following weight/mass percentage composition: 53.5～the TFe of 54.0%, 17.0～
The SiO of 18.0%2, 2.0～the CaO of 3.0%, 0.05～the S of 0.10%；Grain in described middle grade fine ore
The degree middle grade fine ore less than 3mm accounts for more than the 90% of total middle grade fine ore quality.
The method utilizing iron concentrate containing high sulphur to prepare sintering deposit the most according to claim 4, it is characterised in that institute
State high-grade fine ore and include the composition of following weight/mass percentage composition: 58.5～the TFe of 59.5%, 20% with
On FeO, 8.0～the SiO of 9.0%2, 2.5～the CaO of 3.0%, the S of less than 0.5%；In described
In grade fine ore granularity less than the middle grade fine ore of 0.074mm account for total in grade fine ore quality 80% with
On.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109517971A (en) * | 2018-11-06 | 2019-03-26 | 包头钢铁（集团）有限责任公司 | A method of reducing iron concentrate containing high sulphur sulfur content |
| CN111961786A (en) * | 2020-08-31 | 2020-11-20 | 长沙矿冶研究院有限责任公司 | Manganese-iron combined production method for strengthening pyrolusite reduction by using pyrite |
| CN114836616A (en) * | 2022-04-01 | 2022-08-02 | 山西太钢不锈钢股份有限公司 | Iron ore powder pellet and preparation method thereof |
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| CN101999004A (en) * | 2008-04-10 | 2011-03-30 | 新日本制铁株式会社 | Method for producing sintered ore |
| CN103966428A (en) * | 2014-05-21 | 2014-08-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for producing low-sulfur metallized pellets by high-sulfur iron ore concentrate |
| CN104531981A (en) * | 2014-11-21 | 2015-04-22 | 内蒙古包钢钢联股份有限公司 | Method used for preparing sintered ore from high sulfur iron concentrate |
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