CN105734269B - A kind of method for preparing the porous structure material using magnetic iron ore as main thing phase - Google Patents
A kind of method for preparing the porous structure material using magnetic iron ore as main thing phase Download PDFInfo
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- CN105734269B CN105734269B CN201610111693.0A CN201610111693A CN105734269B CN 105734269 B CN105734269 B CN 105734269B CN 201610111693 A CN201610111693 A CN 201610111693A CN 105734269 B CN105734269 B CN 105734269B
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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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- 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
- C22B1/10—Roasting processes in fluidised form
Abstract
The invention discloses a kind of method for preparing the porous structure material using magnetic iron ore as main thing phase, it is characterized in that using pyrite and limonite as raw material, according to mass ratio 3:1~1:1 ratio mixing is granulated, and under anaerobic through 550~800 DEG C of roastings, obtains the material with loose structure characteristic that thing is mutually mainly made up of nanometer submicron crystal particle diameter magnetic iron ore.The material has nano-micrometre space, higher specific surface area, reclaims heavy metal, processing waste water and eutrophic water from waste water as active filter and realizes synchronous denitrification dephosphorizing.
Description
The application be Application No. " 2014104528990 ", the applying date be " 20140905 ", it is entitled " a kind of yellow
The patent of invention Shen of the method for the porous structure material of iron ore and the baking mixed preparation of limonite using magnetic iron ore as main thing phase "
Divisional application please.
First, technical field
The present invention relates to method prepared by mineral resources processing and functionalization material.
2nd, background technology
Environmental protection, prevent that it is the global topic of sex to receive much concern to pollute, treasure limited nature resource, wherein based on natural
Mineral resources pollution administration, repairing environment increasingly attract attention in recent years.In natural minerals, pyrite is quantity in the earth's crust
At most, widest sulfide mineral is distributed, main chemical compositions are FeS2, mainly via magmatic segregation, hydrothermal process,
Biodeposition generates.Mainly it is made up of pyrite and valuable component is only limitted to the ore body of sulphur and is referred to as pyrite deposit.More
Under more situations, pyrite is the essential mineral of non-ferrous metal, precious metal deposit, is returned in ore dressing, metallurgy as byproduct
Receive Sulphur ressource, referred to as iron concentrate.Chinese Yellow iron ore deposit proven reserve is at the forefront in the world.
Pyrite is mainly used as preparing the raw material of sulphur and sulfuric acid.In recent years as the mineral material curbed environmental pollution by
To highest attention, but research shows that pyrite belongs to sulfide, and its surface reaction activity is more than less than magnetic iron ore, and magnetic
The magnetic that pyrite has can reclaim for magnetic separation, the magnetic of material and provide advantage, so activating pyrite by heat treatment mode
Into magnetic iron ore or directly environmental protection is carried out using natural magnetic iron ore gradually to attract attention.Patent CN103626293A is public
A kind of natural magnetic iron ore biofilter is opened and nitrate nitrogen and the method for phosphorus in water removal is synchronously gone using it, there is certain take off
Nitre dephosphorization effect.But the features such as natural magnetic iron ore tool crystallinity is high, particle is big, specific surface area is small, surface-active is relatively low, reduces
Stock utilization.And study and show that pyrite is calcined the magnetic iron ore material that can obtain loose structure under an inert atmosphere
Material, excellent performance is shown in terms of denitrogenation dephosphorizing, adsorption recovery heavy metal.But yellow iron is individually calcined under an inert atmosphere
Elemental sulfur caused by ore deposit easily condenses in pipe-line system, is unfavorable for roasting system normal operation.So find a kind of effectively preparation
Magnetic iron ore solves the problems, such as that the method for pipeline blockage is to make full use of the key technology of Surface of Pyrrhotite activity again.
Limonite is a kind of iron-stone, and essential mineral therein is goethite, simultaneously containing a small amount of bloodstone, quartz, clay
Mineral.Limonite is mainly formed by oxidations such as the sulfide of iron and carbonate, can also be led in lake, marsh isomesia
Cross inorganic and biological agent and be enriched with.Limonite ore is seldom used as iron-smelting raw material because Iron grade is low, often as barren rock
Processing, land resource was both occupied and had ignored its use value, and polluted environment again.China's limonite reserves are very abundant, but
Its chemical composition is not fixed, and iron content is unstable, belongs to extremely difficult iron ore.Limonite raw ore moisture content change is larger,
And crushing was easily produced in attrition process, this is as an important factor for causing China's limonite resource utilization extremely low.
3rd, the content of the invention
The present invention overcomes prior art weak point, there is provided one kind is convenient for production, cost is cheap, tool high-specific surface area, height
Surface-active, the ferromagnetic porous structure material preparation method being made up of magnetic iron ore, preparing the main thing of target product is mutually
Magnetic iron ore.
The present invention solves technical problem, adopts the following technical scheme that：
The present invention prepares the method using magnetic iron ore as the porous structure material of main thing phase, and its feature is：Pass through Huang
Iron ore and limonite is baking mixed prepares；Pyrite and limonite according to mass ratio 3:1~1:1 ratio mixing or
Be granulated, under anaerobic through 550~800 DEG C of fluidized bed roastings or 5~15min of rotary kiln baking, then under oxygen-free atmosphere from
Room temperature so is cooled to, is obtained with the porous structure material of the main thing phase of magnetic iron ore thing.
The above method is preferably following form：
Method one：
Pyrite is crushed, screening obtains pyrite particle thing of the particle size range in 0.5~0.8mm；By limonite ore
Broken, screening obtains limonite particulate matter of the particle size range in 0.9~4mm；By the pyrite particle thing and the limonite
Particulate matter in mass ratio 3:1~1:1 mixing, under anaerobic in 550~800 DEG C of fluidized bed roastings or rotary kiln baking 5~
15min, then naturally cools to room temperature under oxygen-free atmosphere, and particle size range occurs phase in 0.9~4mm limonite particulate matter and turned
Be deformed into porous structure material with magnetic iron ore thing main thing phase of the particle size range in 0.9~4mm, particle size range 0.5~
0.8mm pyrite particle thing occurs phase in version and forms particle size range in 0.5~0.8mm with the main thing phase of magnetic iron ore thing
Porous structure material, two kinds of particle size ranges of 0.5~0.8mm of screened acquisition and 0.9~4mm with the main thing phase of magnetic iron ore thing
Porous structure material.Although baking mixed front and rear there occurs phase transformation and reaction, the apparent particle diameter of particulate matter is substantially not
Become.
Method two：
(1) choose pyrite content be more than 90% industrial flotation of sulfur concentrate powder, weigh account for the iron concentrate silty amount 1~
3%th, particle diameter is less than 1.0mm powdered biomass, then weighs the binding agent for accounting for the iron concentrate silty amount 2~5%, by iron concentrate
Powder, powdered biomass and binding agent are well mixed, and obtain compound A；
(2) by the brown ocher that limonite ore is broken, screening acquisition particle diameter is less than 0.15mm, weigh and account for limonite silty
Amount 1~3%, particle diameter are less than 1.0mm powdered biomass, then weigh the binding agent for accounting for brown ocher quality 2~5%, by brown iron
Miberal powder, powdered biomass and binding agent are well mixed, and obtain compound B；
(3) according to iron concentrate powder and brown ocher mass ratio 3:1~1:1, compound A balling-up is added first in pan-pelletizer
To particle diameter in 3~4mm, compound B is then gradually added into pan-pelletizer again, continues balling-up to particle diameter in 5~8mm, obtain with
Iron concentrate powder is internal layer, the hybrid particles thing of brown ocher is coated with outside it；
(4) under anaerobic in 550~800 DEG C of fluidized bed roastings or rotary kiln baking after the hybrid particles thing is dried
5~15min, room temperature is then being naturally cooled under oxygen-free atmosphere, that is, be able to the loose structure that magnetic iron ore is main thing phase
Material.
Method three：
(1) by the limonite particulate matter that limonite ore is broken, screening acquisition particle diameter is less than 0.15mm, pyrite is crushed
Into the pyrite particle thing that particle diameter is 3~5mm, weigh and account for the limonite particulate matter quality 1~3%, particle diameter less than 1.0mm's
Powdered biomass, then the binding agent for accounting for the limonite particulate matter quality 2~5% is weighed, mixing limonite particle, biomass powder
And binding agent, obtain compound C；
(2) pyrite particle thing is sprinkled into pan-pelletizer first, according still further to pyrite particle thing and limonite particulate matter
Measure ratio 3:1~1:1 is gradually added compound C balling-up to particle diameter in 5~8mm, obtains using pyrite particle thing as internal layer, outside it
Portion is coated with the hybrid particles thing of limonite；
(3) under anaerobic in 550~800 DEG C of fluidized bed roastings or rotary kiln baking after the hybrid particles thing is dried
5~15min, room temperature is then being naturally cooled under oxygen-free atmosphere, that is, be able to the loose structure that magnetic iron ore is main thing phase
Material.
Method four：
100 mesh sieves are crossed after limonite ore is crushed and obtain brown ocher, pyrite content is chosen and is more than 90%, particle diameter mistake
The mass ratio of the industrial flotation of sulfur concentrate powder of 100 mesh sieves, iron concentrate powder and brown ocher is 3:1~1:1, weigh and account for the sulphur essence
Powdered ore quality 1~3%, particle diameter are less than 1.0mm powdered biomass, then weigh the bonding for accounting for the iron concentrate silty amount 2~5%
Agent；Iron concentrate powder, brown ocher, powdered biomass and binding agent are well mixed, are then granulated the mixing in 5~8mm for particle diameter
Close particulate matter, after hybrid particles thing is dried under anaerobic in 550~800 DEG C of fluidized bed roastings or rotary kiln baking 5~
15min, room temperature is then being naturally cooled under oxygen-free atmosphere, that is, be able to the loose structure material that magnetic iron ore is main thing phase
Material.
Limonite is blended under oxygen-free atmosphere (nitrogen atmosphere) with pyrite and is calcined, can both utilize wherein goethite
Chemical oxygen roasted pyrite, improve gas SO2Elemental sulfur condensation problem caused by concentration, the independent roasted pyrite of elimination, again may be used
The reduction roasting of limonite is realized with the chemical energy using pyrite, goethite therein is changed into newborn magnetic iron ore；It is logical
The use of powdered biomass and binding agent is crossed, particle pore structure can be enriched, strengthens its mechanical strength；Facilitate it using magnetic characteristic
Recycle, improve magnetic iron ore utilization rate.
Present invention is mainly reflected in the following aspects：
1st, the present invention makes full use of elemental sulfur caused by pyrite thermal decomposition by pyrite and the baking mixed of limonite
Reaction with Lattice Oxygen in the goethite in limonite forms SO2, not only solve gas circuit existing for independent roasted pyrite because of sulphur
Sulphur condenses the problem that results in blockage, and can also improve SO in gas2Concentration, improve gas washing in SA production efficiency；
2nd, limonite and pyrite of the present invention selection with loose structure feature are baking mixed, and sulphur steam can penetrate into
Enter inside limonite particle voids, not only increase the reaction rate of sulphur steam and goethite crystals oxygen, and improve and reacted
Whole degree, finally makes goethite be completely transformed into magnetic iron ore；
3rd, the present invention not only makes pyrite be changed into the magnetic iron ore with loose structure feature, and the pin in limonite
Iron ore is also completely transformed into magnetic iron ore, and compared with the magnetic iron ore that the former forms, the latter has higher chemistry and biology anti-
Should be active, there is higher application effect as Environmental Engineering Material；
4th, by the present invention in that with biomass powder, binding agent, promote the sintering of iron concentrate powder, be granulated into using pan-pelletizer
Type, the spherical particle material with loose structure feature being made up of magnetic iron ore can be formed by anaerobic roasting；Biomass powder
Addition enrich particle pore structure；The use of binding agent enhances granule strength；The particle is used for denitrogenation as biofilter material
Dephosphorization, or the ion-exchange reactions filtrate of recovery heavy metal, and can realize that material magnetic manipulates；
5th, by the product magnetic susceptibility prepared by the inventive method between 1249~2740X10-8m3/ kg, product compare surface
6.9~10.2m of product2/g.Product speed ratio pyrite of chemical oxidation in water is big more than 100 times, with heavy metal copper ion
Reaction rate is bigger than pyrite more than 50 times.
4th, illustrate
Fig. 1 is the X-ray diffractogram of the products therefrom of the embodiment of the present invention 1；
Fig. 2 is the field emission scanning electron microscope image of the products therefrom of the embodiment of the present invention 1；Wherein A figures are 0.5~0.8mm Huangs
Iron ore thermal decomposition product；B figures are 0.9~4mm limonites and sulphur steam reaction product, pyrite thermal decomposition product and limonite with
Sulphur steam reaction product all shows that product has the loose structure feature in nano-micrometre grade space；
Fig. 3 is the X-ray diffractogram of the products therefrom of the embodiment of the present invention 2；
Fig. 4 is the field emission scanning electron microscope image of the products therefrom of the embodiment of the present invention 2；
Fig. 5 is the X-ray diffractogram of the products therefrom of the embodiment of the present invention 3；
Fig. 6 is the field emission scanning electron microscope image of the products therefrom of the embodiment of the present invention 3；
Fig. 7 is the X-ray diffractogram of the products therefrom of the embodiment of the present invention 4；
Fig. 8 is the field emission scanning electron microscope image of the products therefrom of the embodiment of the present invention 4；
Fig. 9 is the X-ray diffractogram of the products therefrom of the embodiment of the present invention 5；
Figure 10 is the field emission scanning electron microscope image of the products therefrom of the embodiment of the present invention 5.
5th, embodiment
The non-limiting examples of the present invention are described below.
Embodiment 1：
The present embodiment prepares the porous structure material using magnetic iron ore as main thing phase as follows：
The ore for selecting pyrite content to be more than 90%, crushing and screening obtain 0.5~0.8mm pyrite particle things；
The limonite ore for selecting goethite content to be more than 85%, crushing and screening obtain 3~3.5mm limonite particle
Thing；
Above-mentioned pyrite particle thing and limonite particulate matter according to mass percent 2:1 ratio is well mixed；
Said mixture material is added in rotary kiln under oxygen-free atmosphere and is calcined 10min and in oxygen-free atmosphere in 700 DEG C
Under naturally cool to room temperature, obtain the porous structure material that target product is made up of magnetic iron ore；Wherein, particle size range 3~
3.5mm limonite particulate matter occurs phase in version and forms particle size range in 3~3.5mm with the more of the main thing phase of magnetic iron ore thing
Pore structure material, particle size range 0.5~0.8mm pyrite particle thing occur phase in version formed particle size range 0.5~
Two kinds of the 0.8mm porous structure material with the main thing phase of magnetic iron ore thing, 0.5~0.8mm of screened acquisition and 3~3.5mm
The porous structure material with the main thing phase of magnetic iron ore thing of particle size range.
The X-ray diffractogram of gained target product is as shown in figure 1, as can be seen from the figure product is substantially by magnetic iron ore group
Into.
The field emission scanning electron microscope figure of gained target product is as shown in Fig. 2 as can be seen from the figure 0.5~0.8mm Huangs iron
Ore deposit thermal decomposition product, 0.9~4mm limonites and sulphur steam reaction product all show that product has nano-micrometre level crystal grain
Footpath and the loose structure feature of intergranular pore.
After tested, the magnetic susceptibility of the present embodiment products therefrom is 1783 × 10-8m3/ kg, product specific surface area 7.1m2/g。
Product speed ratio pyrite of chemical oxidation in water is big more than 100 times, compares pyrite with the reaction rate of heavy metal copper ion
It is big more than 50 times.
Embodiment 2：
The present embodiment prepares magnetic iron ore porous structure material as follows：
The ore for selecting pyrite content to be more than 90%, crushing and screening obtain 0.5~0.8mm pyrite particle things；
The limonite ore for selecting goethite content to be more than 90%, crushing and screening obtain 0.5~0.8mm limonite particle
Thing；
Above-mentioned pyrite particle thing and limonite particulate matter according to mass percent 2.5:1 ratio is well mixed；
Said mixture material is added in rotary kiln under protective atmosphere and is calcined 10min and in protective atmosphere in 700 DEG C
Under naturally cool to room temperature, obtain target product.
Fig. 3 is the XRD of products therefrom, and as can be seen from the figure product is using magnetic iron ore as main thing phase；
Fig. 4 for product field emission scanning electron microscope image, as can be seen from the figure product is with nano-micrometre
The loose structure feature of level crystal particle diameter and intergranular pore.
After tested, the unit mass magnetic susceptibility of the present embodiment products therefrom is 2740 × 10-8m3/ kg, product specific surface area
7.9m2/g.Product speed ratio pyrite of chemical oxidation in water is big more than 100 times, the reaction rate with heavy metal copper ion
It is bigger than pyrite more than 50 times.
Embodiment 3
The present embodiment prepares magnetic iron ore porous structure material as follows：
(1) the industrial flotation of sulfur concentrate powder that pyrite content is more than 90% is chosen, 2kg iron concentrates powder, 40g particle diameters are less than
1.0mm stalk powders and 80g sodium silicate binders are well mixed, and obtain compound A；
(2) limonite ore is crushed, brown ocher of the screening acquisition particle diameter less than 0.15mm, by 1kg limonite particles
Thing, 15g particle diameters are less than 1.0mm stalk powders and 40g sodium silicate binders are well mixed, and obtain compound B；
(3) first in pan-pelletizer add compound A, start pan-pelletizer, with 40r/min speed make compound A into
Rolled in ball disk, water spray makes compound A surface wettabilities in pan-pelletizer, balling-up to particle diameter in 3~4mm, then again into
It is gradually added compound B in ball disk, continues balling-up to particle diameter in 5~10mm, obtain and wrapped using iron concentrate powder as internal layer, outside it
It is covered with the hybrid particles thing of brown ocher；
(4) it will dry to water content and be less than after 2% under anaerobic in 800 DEG C of roastings in hybrid particles thing hot-air
10min, room temperature then is being naturally cooled under oxygen-free atmosphere, is producing target product.
Fig. 5 is the XRD of products therefrom, and as can be seen from the figure product is using magnetic iron ore as main thing phase；
Fig. 6 for product field emission scanning electron microscope image, as can be seen from the figure product is with nano-micrometre
The loose structure feature of level crystal particle diameter and intergranular pore.
After tested, the unit mass magnetic susceptibility of the present embodiment products therefrom is 2217 × 10-8m3/ kg, product specific surface area
8.4m2/g.Product speed ratio pyrite of chemical oxidation in water is big more than 100 times, the reaction rate with heavy metal copper ion
It is bigger than pyrite more than 50 times.
Embodiment 4
The present embodiment prepares magnetic iron ore porous structure material as follows：
(1) limonite ore is crushed, the 1kg limonite particulate matters that screening acquisition particle diameter is 0.05~0.1mm, by yellow iron
Ore deposit is broken into the 3kg pyrite particle things that particle diameter is 3~4mm, weighs 20g particle diameters and is less than 1.0mm stalk powder, then weighs
50g sodium silicate binders, mixing limonite particulate matter, stalk powder and binding agent, obtain compound C；
(2) pyrite particle thing is sprinkled into pan-pelletizer first, uniformly water spray makes its table on the surface of pyrite particle thing
Face moistens, and is then at the uniform velocity sprinkled into compound C again and simultaneously keeps particle surface dampness to particle surface water spray simultaneously, is added with adhesion
The powder material entered, pan-pelletizer make compound C progressively be coated on pyrite for 25~30 degree in inclination with 50r/min rotational speeds
On grain thing, as particle rolls in pan-pelletizer, particle diameter constantly increases, until particle diameter in 6~8mm, is obtained with Huang
Iron ores particle thing is internal layer, the hybrid particles thing of brown ocher is coated with outside it；
(3) it will dry to water content and be less than after 2% under anaerobic in 550 DEG C of roastings in hybrid particles thing hot-air
15min, room temperature then is being naturally cooled under oxygen-free atmosphere, is producing target product.
Fig. 7 is the XRD of products therefrom, and as can be seen from the figure product is using magnetic iron ore as main thing phase；
Fig. 8 for product field emission scanning electron microscope image, as can be seen from the figure product is with nano-micrometre
The loose structure feature of level crystal particle diameter and intergranular pore.
After tested, the unit mass magnetic susceptibility of the present embodiment products therefrom is 1629 × 10-8m3/ kg, product specific surface area
10.2m2/g.Product speed ratio pyrite of chemical oxidation in water is big more than 100 times, the reaction rate with heavy metal copper ion
It is bigger than pyrite more than 50 times.
Embodiment 5
The limonite ore for selecting goethite content to be more than 90%, crushed 100 mesh sieves and obtain brown ocher；
Choose the industrial flotation of sulfur concentrate powder that pyrite content is more than 90%；
Sawdust is crushed the sawdust powder for obtaining particle diameter and being less than 1.0mm；
1kg brown ochers, 2.5kg iron concentrates powder, 50g sawdust powders, 125g sodium metaaluminate binding agents are weighed, is well mixed
Compound；
Measure 1 liter of water and compound mix is uniform, the hybrid particles thing for obtaining 6~8mm of particle diameter is molded with comminutor；
Hybrid particles thing is dried to water content to be less than after 2% in hot-air and is added in rotary kiln in a nitrogen atmosphere
Be calcined in 800 DEG C and 10min and be cooled to room temperature in a nitrogen atmosphere, obtain by nanometer sub-micron magnetic iron ore form with more
The material of Pore Characteristics.
Fig. 9 is the XRD of products therefrom, and as can be seen from the figure product is using magnetic iron ore as main thing phase；
Figure 10 for product field emission scanning electron microscope image, as can be seen from the figure product is with nanometer-micro-
The loose structure feature of meter level crystal particle diameter and intergranular pore.
After tested, the unit mass magnetic susceptibility of the present embodiment products therefrom is 1417 × 10-8m3/ kg, product specific surface area
7.3m2/g.Product speed ratio pyrite of chemical oxidation in water is big more than 100 times, the reaction rate with heavy metal copper ion
It is bigger than pyrite more than 50 times.
Claims (1)
- A kind of 1. method for preparing the porous structure material using magnetic iron ore as main thing phase, it is characterised in that：Pass through pyrite With limonite is baking mixed prepares；Pyrite and limonite according to mass ratio 3:1~1:1 ratio mixing is made Grain, it is then natural under oxygen-free atmosphere under anaerobic through 550~800 DEG C of fluidized bed roastings or 5~15min of rotary kiln baking Room temperature is cooled to, is obtained with the porous structure material of the main thing phase of magnetic iron ore thing；Specifically carry out as follows：(1) choose pyrite content be more than 90% industrial flotation of sulfur concentrate powder, weigh account for the iron concentrate silty amount 1~3%, Particle diameter is less than 1.0mm powdered biomass, then weighs the binding agent for accounting for the iron concentrate silty amount 2~5%, by iron concentrate powder, Powdered biomass and binding agent are well mixed, and obtain compound A；(2) by the brown ocher that limonite ore is broken, screening acquisition particle diameter is less than 0.15mm, weigh and account for brown ocher quality 1 ~3%, particle diameter is less than 1.0mm powdered biomass, then weighs the binding agent for accounting for brown ocher quality 2~5%, by limonite Powder, powdered biomass and binding agent are well mixed, and obtain compound B；(3) according to iron concentrate powder and brown ocher mass ratio 3:1~1:1, compound A balling-up is added first in pan-pelletizer to grain Then footpath is gradually added compound B in 3~4mm into pan-pelletizer again, continue balling-up to particle diameter in 5~8mm, obtain with sulphur essence Miberal powder is internal layer, the hybrid particles thing of brown ocher is coated with outside it；(4) after the hybrid particles thing is dried under anaerobic in 550~800 DEG C of fluidized bed roastings or rotary kiln baking 5~ 15min, room temperature is then being naturally cooled under oxygen-free atmosphere, that is, be able to the loose structure material that magnetic iron ore is main thing phase Material.
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| CN201410452899.0A CN104164557B (en) | 2014-09-05 | 2014-09-05 | The method of the baking mixed preparation of a kind of pyrite and limonite taking magnetic iron ore as the porous structure material of main thing phase |
| CN201610111693.0A CN105734269B (en) | 2014-09-05 | 2014-09-05 | A kind of method for preparing the porous structure material using magnetic iron ore as main thing phase |
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| US4466362A (en) * | 1982-03-03 | 1984-08-21 | Massachusetts Institute Of Technology | Method of removing sulfur and other contaminants from the coal in coal-oil slurries |
| SU1684262A1 (en) * | 1989-03-30 | 1991-10-15 | Химико-металлургический институт АН КазССР | Method of preparing pyrrhotite |
| JPH11226447A (en) * | 1998-02-12 | 1999-08-24 | Mitsubishi Heavy Ind Ltd | Method for desulfurizing coal and device therefor |
| US6962685B2 (en) * | 2002-04-17 | 2005-11-08 | International Business Machines Corporation | Synthesis of magnetite nanoparticles and the process of forming Fe-based nanomaterials |
| CN101235426A (en) * | 2008-02-27 | 2008-08-06 | 周灿 | Technique for preparing iron refined powder by troilite mixing burning brown hematite and specularite |
| CN102320668B (en) * | 2011-06-03 | 2013-06-12 | 合肥工业大学 | Pyrite nano mineral material and preparation method thereof |
| CN102826642A (en) * | 2012-09-10 | 2012-12-19 | 合肥工业大学 | Method for recovering wastewater by using colloform pyrite |
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