CN104164557A - Method for preparing porous structure material taking pyrrhotite as main phase through mixing and roasting pyrite and limonite - Google Patents
Method for preparing porous structure material taking pyrrhotite as main phase through mixing and roasting pyrite and limonite Download PDFInfo
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- CN104164557A CN104164557A CN201410452899.0A CN201410452899A CN104164557A CN 104164557 A CN104164557 A CN 104164557A CN 201410452899 A CN201410452899 A CN 201410452899A CN 104164557 A CN104164557 A CN 104164557A
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Abstract
The invention discloses a method for preparing a porous structure material taking pyrrhotite as a main phase through mixing and roasting pyrite and limonite. The method is characterized by comprising the following steps: by taking pyrite and limonite as raw materials, mixing or pelletizing according to the mass ratio of (3:1)-(1:1), roasting at 550-800DEG C under an oxygen-free condition, to obtain a material with a phase mainly including nanometer-submicron crystal grain-size pyrrhotite, and having a porous structure characteristic. The material has nanometer-submicron interspace and high specific surface area, and as an active filtering material, the material can recover heavy metal from waste water and treat waste water and eutrophication water to realize simultaneous phosphorus and nitrogen removal.
Description
One, technical field
The present invention relates to method prepared by mineral wealth processing and functionalization material.
Two, background technology
Protection of the environment, prevents from polluting, and treasuring limited nature resource is the global topic receiving much concern, and wherein more and more receives publicity in recent years based on natural mineral resource improvement pollution, repairing environment.In natural mineral, pyrite be in the earth's crust quantity at most, the sulfide mineral the most widely that distributes, main chemical compositions is FeS
2, mainly generate via magmatic segregation, hydrothermalism, biodeposition.Mainly formed by pyrite and ore body that valuable component only limits to sulphur is called pyrite deposit.Under more situation, pyrite is the essential mineral of non-ferrous metal, precious metal deposit, in ore dressing, metallurgy, reclaims sulphur resource as byproduct, is called sulphur concentrate.Chinese Yellow iron ore deposit proven reserve is at the forefront in the world.
Pyrite is mainly as the raw material of preparing sulphur and sulfuric acid.Shown great attention to as the mineral material of curbing environmental pollution in recent years; but research shows that pyrite belongs to sulfide; its surface reaction activity is more than lower than pyrrhotite; and the advantage that provides is provided magnetic separation, magnetic that the magnetic that has of pyrrhotite can be material, becomes pyrrhotite or directly adopt natural pyrrhotite to carry out environment protection and receive publicity gradually so activate pyrite by heat treatment mode.Publication (CN103626293A) discloses a kind of natural pyrrhotite biological filter and has utilized its synchronous method of removing nitre nitrogen and phosphorus in water, has certain denitration and dephosphorization effect.But the features such as natural pyrrhotite tool degree of crystallinity is high, particle is large, specific surface area is little, surfactivity is on the low side, has reduced material use efficiency.And research shows that pyrite roasting under inert atmosphere can obtain the pyrrhotite material of vesicular structure, aspect denitrogenation dephosphorizing, absorption recovery heavy metal, showing excellent performance.But the elemental sulfur that roasted pyrite produces separately under inert atmosphere easily condenses in piping system, be unfavorable for that roasting system runs well.So find, a kind of effectively to prepare the method that pyrrhotite solves again line clogging problem be the gordian technique that makes full use of Surface of Pyrrhotite activity.
Limonite is a kind of iron-stone, and essential mineral is wherein pyrrhosiderite, contains a small amount of rhombohedral iron ore, quartz, clay mineral simultaneously.Limonite mainly forms by the oxidation such as sulfide and carbonate of iron, also can be in lake, marsh isomesia by inorganic and biological action and enrichment.Limonite ore, because iron grade is low, is seldom used as iron-smelting raw material, usually as barren rock processing, has both taken land resources and has ignored its use value, has polluted again environment.China's limonite reserves are very abundant, but its chemical composition is unfixing, and iron level is unstable, belongs to utmost point refractory iron ore.Limonite raw ore moisture content change is larger, and easily produces pulverizing in attrition process, and this becomes and causes the extremely low important factor of China's limonite resource utilization.
Three, summary of the invention
The present invention overcomes prior art weak point, and a kind of convenient for production, with low cost, tool high-specific surface area, high surface, the ferromagnetic porous structure material preparation method who is made up of pyrrhotite are provided, and preparing the main thing of target product is pyrrhotite mutually.
Technical solution problem of the present invention, adopts following technical scheme:
The method of the baking mixed preparation of pyrite of the present invention and limonite taking pyrrhotite as the porous structure material of main thing phase, its feature is: pyrite and limonite are mixed or granulation according to the ratio of mass ratio 3:1～1:1, under oxygen free condition through 550～800 DEG C of fluidized bed roastings or rotary kiln baking 5～15min, then under oxygen-free atmosphere, naturally cool to room temperature, obtain the porous structure material of wanting thing phase with pyrrhotite owner.
Aforesaid method is preferably following form:
Method one:
Pyrite fragmentation, screening are obtained to the pyrite particle thing of particle size range at 0.5～0.8mm, limonite ore fragmentation, screening are obtained to the limonite particulate matter of particle size range at 0.9～4mm, described pyrite particle thing and described limonite particulate matter 3:1 in mass ratio～1:1 are mixed, under oxygen free condition in 550～800 DEG C of fluidized bed roastings or rotary kiln baking 5～15min, then under oxygen-free atmosphere, naturally cool to room temperature, particle size range occurs to change mutually in the limonite particulate matter of 0.9～4mm and forms particle size range and want the porous structure material of thing phase at 0.9～4mm with pyrrhotite owner, particle size range occurs to change mutually at the pyrite particle thing of 0.5～0.8mm and forms particle size range and want the porous structure material of thing phase at 0.5～0.8mm with pyrrhotite owner, what obtain 0.5～0.8mm and two kinds of particle size range of 0.9～4mm through screening wants the porous structure material of thing phase with pyrrhotite owner.Although there is phase transformation and reaction in baking mixed front and back, the apparent particle diameter of particulate matter is substantially constant.
Method two:
(1) choose the industrial flotation of sulfur concentrate powder that pyrite content is greater than 90%, take and account for the powdered biomass that described fined sulphur ore powder quality 1～3%, particle diameter are less than 1.0mm, take again the binding agent that accounts for described fined sulphur ore powder quality 2～5%, fined sulphur ore powder, powdered biomass and binding agent are mixed, obtain compound A;
(2) limonite ore fragmentation, screening are obtained to the brown ocher that particle diameter is less than 0.15mm, take and account for the powdered biomass that brown ocher quality 1～3%, particle diameter are less than 1.0mm, take again the binding agent that accounts for brown ocher quality 2～5%, brown ocher, powdered biomass and binding agent are mixed, obtain compound B;
(3) according to fined sulphur ore powder and brown ocher mass ratio 3:1～1:1, first in pan-pelletizer, add compound A balling-up to particle diameter at 3～4mm, and then progressively add compound B in pan-pelletizer, continuation balling-up at 5～8mm, obtains taking fined sulphur ore powder as internal layer, is coated with in its outside the composite grain thing of brown ocher to particle diameter;
(4) after described composite grain thing is dry under oxygen free condition in 550～800 DEG C of fluidized bed roastings or rotary kiln baking 5～15min, then under oxygen-free atmosphere, naturally cooling to room temperature, be able to the porous structure material that pyrrhotite is main thing phase.
Method three:
(1) limonite ore fragmentation, screening are obtained to the limonite particulate matter that particle diameter is less than 0.15mm, pyrite is broken into the pyrite particle thing that particle diameter is 3～5mm, take and account for the powdered biomass that described limonite particulate matter quality 1～3%, particle diameter are less than 1.0mm, take again the binding agent that accounts for described limonite particulate matter quality 2～5%, mix limonite particle, biomass powder and binding agent, obtain compound C;
(2) first in pan-pelletizer, be sprinkled into pyrite particle thing, again according to pyrite particle thing and limonite particulate matter quality than 3:1～1:1 progressively add compound C balling-up to particle diameter at 5～8mm, obtain taking pyrite particle thing as internal layer, be coated with in its outside the composite grain thing of limonite;
(3) after described composite grain thing is dry under oxygen free condition in 550～800 DEG C of fluidized bed roastings or rotary kiln baking 5～15min, then under oxygen-free atmosphere, naturally cooling to room temperature, be able to the porous structure material that pyrrhotite is main thing phase.
Method four:
Rear limonite ore fragmentation mistake 100 mesh sieves are obtained to brown ocher, choose the industrial flotation of sulfur concentrate powder that pyrite content is greater than 90%, particle diameter is crossed 100 mesh sieves, the mass ratio of fined sulphur ore powder and brown ocher is 3:1～1:1, take and account for described fined sulphur ore powder quality 1～3%, particle diameter is less than the powdered biomass of 1.0mm, then takes the binding agent that accounts for described fined sulphur ore powder quality 2～5%; Fined sulphur ore powder, brown ocher, powdered biomass and binding agent are mixed, then granulation is the composite grain thing of particle diameter at 5～8mm, after composite grain thing is dry under oxygen free condition in 550～800 DEG C of fluidized bed roastings or rotary kiln baking 5～15min, then under oxygen-free atmosphere, naturally cool to room temperature, be able to the porous structure material that pyrrhotite is main thing phase.
Limonite and pyrite are blended in to roasting under oxygen-free atmosphere (nitrogen atmosphere), both can have utilized wherein chemical oxygen roasted pyrite, the raising gas SO of pyrrhosiderite
2concentration, eliminate the elemental sulfur condensation problem that independent roasted pyrite produces, can utilize again pyritous chemical energy to realize the reducing roasting of limonite, pyrrhosiderite is wherein changed into newborn pyrrhotite; By the use of powdered biomass and binding agent, can enrich particle pore structure, strengthen its physical strength; Utilize magnetic characteristic to facilitate it to recycle, improve pyrrhotite rate of utilization.
Summary of the invention is mainly reflected in the following aspects:
1, the present invention makes full use of reacting of lattice oxygen in the pyrrhosiderite in elemental sulfur and the limonite that pyrite thermolysis produces by pyrite and limonite baking mixed and forms SO
2, not only solve gas circuit that independent roasted pyrite exists because of the sulphur problem of resulting in blockage of condensing, can also improve SO in gas
2concentration, improves gas washing in SA production efficiency;
2, to select to have limonite and the pyrite of vesicular structure feature baking mixed in the present invention, sulphur steam can penetrate into limonite particle voids inside, not only improve the speed of reaction of sulphur steam and goethite crystals oxygen, and raising complete degree of reaction, finally make pyrrhosiderite change pyrrhotite completely into;
3, the present invention not only makes pyrite change the pyrrhotite with vesicular structure feature into, and pyrrhosiderite in limonite also changes pyrrhotite completely into, compared with the pyrrhotite forming with the former, the latter has higher chemistry and biological respinse activity, has higher effect as Environmental Engineering Material;
4, the present invention, by using biomass powder, binding agent, promotes the sintering of fined sulphur ore powder, utilizes pan-pelletizer granulating and forming, can form the spherical particle material with vesicular structure feature being made up of pyrrhotite by anaerobic roasting; Particle pore structure has been enriched in the interpolation of biomass powder; The use of binding agent has strengthened granule strength; This particle is used for denitrogenation dephosphorizing as biofilter material, or reclaims the ion exchange reaction filtrate of heavy metal, and can realize material magnetic and handle;
5, pass through the prepared product susceptibility of the inventive method between 1249～2740 × 10
-8m
3/ kg, product specific surface area 6.9～10.2m
2/ g.Product speed ratio pyrite of chemical oxidation in water is large more than 100 times, larger more than 50 times than pyrite with the speed of reaction of heavy metal copper ion.
Four, brief description of the drawings
Fig. 1 is the X-ray diffractogram of the embodiment of the present invention 1 products therefrom;
Fig. 2 is the field emission scanning electron microscope image of the embodiment of the present invention 1 products therefrom; Wherein A figure is 0.5～0.8mm pyrite thermal decomposition product; B figure is 0.9～4mm limonite and sulphur steam reaction product, and pyrite thermal decomposition product and limonite and sulphur steam reaction product all demonstrate product and have the vesicular structure feature in nano-micrometre grade space;
Fig. 3 is the X-ray diffractogram of the embodiment of the present invention 2 products therefroms;
Fig. 4 is the field emission scanning electron microscope image of the embodiment of the present invention 2 products therefroms;
Fig. 5 is the X-ray diffractogram of the embodiment of the present invention 3 products therefroms;
Fig. 6 is the field emission scanning electron microscope image of the embodiment of the present invention 3 products therefroms;
Fig. 7 is the X-ray diffractogram of the embodiment of the present invention 4 products therefroms;
Fig. 8 is the field emission scanning electron microscope image of the embodiment of the present invention 4 products therefroms;
Fig. 9 is the X-ray diffractogram of the embodiment of the present invention 5 products therefroms;
Figure 10 is the field emission scanning electron microscope image of the embodiment of the present invention 5 products therefroms.
Five, embodiment
Non-limiting examples of the present invention is described below.
Embodiment 1:
The present embodiment is prepared the porous structure material taking pyrrhotite as main thing phase as follows:
The ore of selecting pyrite content to be greater than 90%, crushing and screening obtains 0.5～0.8mm pyrite particle thing;
The limonite ore of selecting pyrrhosiderite content to be greater than 85%, crushing and screening obtains the limonite particulate matter of 3～3.5mm;
Above-mentioned pyrite particle thing is mixed according to the ratio of mass percent 2:1 with limonite particulate matter;
Said mixture material is joined in rotary kiln under oxygen-free atmosphere in 700 DEG C of roasting 10min and naturally cool to room temperature under oxygen-free atmosphere, obtain the porous structure material that target product is made up of pyrrhotite; Wherein, particle size range occurs to change mutually in the limonite particulate matter of 3～3.5mm and forms particle size range and want the porous structure material of thing phase at 3～3.5mm with pyrrhotite owner, particle size range the pyrite particle thing of 0.5～0.8mm occur to change mutually form particle size range 0.5～0.8mm want the porous structure material of thing phase with pyrrhotite owner, want the porous structure material of thing phase through screening acquisition 0.5～0.8mm and two kinds of particle size range of 3～3.5mm with pyrrhotite owner.
As shown in Figure 1, as can be seen from the figure product is made up of pyrrhotite the X-ray diffractogram of gained target product substantially.
As shown in Figure 2, as can be seen from the figure 0.5～0.8mm pyrite thermal decomposition product, 0.9～4mm limonite and sulphur steam reaction product all demonstrate product and have the vesicular structure feature of nano-micrometre level crystal particle diameter and intergranular pore to the field emission scanning electron microscope figure of gained target product.
After tested, the susceptibility of the present embodiment products therefrom is 1783 × 10
-8m
3/ kg, product specific surface area 7.1m
2/ g.Product speed ratio pyrite of chemical oxidation in water is large more than 100 times, larger more than 50 times than pyrite with the speed of reaction of heavy metal copper ion.
Embodiment 2:
The present embodiment is prepared pyrrhotite porous structure material as follows:
The ore of selecting pyrite content to be greater than 90%, crushing and screening obtains 0.5～0.8mm pyrite particle thing;
The limonite ore of selecting pyrrhosiderite content to be greater than 90%, crushing and screening obtains the limonite particulate matter of 0.5～0.8mm;
Above-mentioned pyrite particle thing is mixed according to the ratio of mass percent 2.5:1 with limonite particulate matter;
Said mixture material is joined in rotary kiln under protective atmosphere in 700 DEG C of roasting 10min and naturally cool to room temperature under protective atmosphere, obtain target product.
Fig. 3 is the XRD figure of products therefrom, and as can be seen from the figure product is taking pyrrhotite as main thing phase;
Fig. 4 for the field emission scanning electron microscope image of product, as can be seen from the figure product has the vesicular structure feature of nano-micrometre level crystal particle diameter and intergranular pore.
After tested, the unit mass susceptibility of the present embodiment products therefrom is 2740 × 10
-8m
3/ kg, product specific surface area 7.9m
2/ g.Product speed ratio pyrite of chemical oxidation in water is large more than 100 times, larger more than 50 times than pyrite with the speed of reaction of heavy metal copper ion.
Embodiment 3
The present embodiment is prepared pyrrhotite porous structure material as follows:
(1) choose the industrial flotation of sulfur concentrate powder that pyrite content is greater than 90%, 2kg fined sulphur ore powder, 40g particle diameter are less than to 1.0mm stalk powder and 80g sodium silicate binder mixes, obtain compound A;
(2) limonite ore fragmentation, screening are obtained to particle diameter and be less than the brown ocher of 0.15mm, 1kg limonite particulate matter, 15g particle diameter are less than to 1.0mm stalk powder and 40g sodium silicate binder mixes, obtain compound B;
(3) first in pan-pelletizer, add compound A, start pan-pelletizer, with the speed of 40r/min, compound A is rolled in pan-pelletizer, water spray makes the compound A surface wettability in pan-pelletizer, balling-up to particle diameter at 3～4mm, and then progressively adding compound B in pan-pelletizer, continuation balling-up at 5～10mm, obtains taking fined sulphur ore powder as internal layer, is coated with in its outside the composite grain thing of brown ocher to particle diameter;
(4) by after being dried to water content in composite grain thing warm air and being less than 2% under oxygen free condition in 800 DEG C of roasting 10min, then, naturally cool to room temperature under oxygen-free atmosphere, obtain target product.
Fig. 5 is the XRD figure of products therefrom, and as can be seen from the figure product is taking pyrrhotite as main thing phase;
Fig. 6 for the field emission scanning electron microscope image of product, as can be seen from the figure product has the vesicular structure feature of nano-micrometre level crystal particle diameter and intergranular pore.
After tested, the unit mass susceptibility of the present embodiment products therefrom is 2217 × 10
-8m
3/ kg, product specific surface area 8.4m
2/ g.Product speed ratio pyrite of chemical oxidation in water is large more than 100 times, larger more than 50 times than pyrite with the speed of reaction of heavy metal copper ion.
Embodiment 4
The present embodiment is prepared pyrrhotite porous structure material as follows:
(1) limonite ore fragmentation, screening are obtained to the 1kg limonite particulate matter that particle diameter is 0.05～0.1mm, pyrite is broken into the 3kg pyrite particle thing that particle diameter is 3～4mm, take the stalk powder that 20g particle diameter is less than 1.0mm, take again 50g sodium silicate binder, mix limonite particulate matter, stalk powder and binding agent, obtain compound C;
(2) first in pan-pelletizer, be sprinkled into pyrite particle thing, surface uniform water spray at pyrite particle thing makes its surface wettability, and then be at the uniform velocity sprinkled into compound C and keep particle surface dampness to particle surface water spray simultaneously, to adhere to the powder material adding, pan-pelletizer is progressively coated on pyrite particle thing compound C at 25～30 degree that tilt with 50r/min rotational speed, along with particle rolls in pan-pelletizer, particle diameter constantly increases, until particle diameter is at 6～8mm, obtain taking pyrite particle thing as internal layer, be coated with the composite grain thing of brown ocher in its outside,
(3) by after being dried to water content in composite grain thing warm air and being less than 2% under oxygen free condition in 550 DEG C of roasting 15min, then, naturally cool to room temperature under oxygen-free atmosphere, obtain target product.
Fig. 7 is the XRD figure of products therefrom, and as can be seen from the figure product is taking pyrrhotite as main thing phase;
Fig. 8 for the field emission scanning electron microscope image of product, as can be seen from the figure product has the vesicular structure feature of nano-micrometre level crystal particle diameter and intergranular pore.
After tested, the unit mass susceptibility of the present embodiment products therefrom is 1629 × 10
-8m
3/ kg, product specific surface area 10.2m
2/ g.Product speed ratio pyrite of chemical oxidation in water is large more than 100 times, larger more than 50 times than pyrite with the speed of reaction of heavy metal copper ion.
Embodiment 5
The limonite ore of selecting pyrrhosiderite content to be greater than 90%, broken 100 mesh sieves of crossing obtain brown ocher;
Choose the industrial flotation of sulfur concentrate powder that pyrite content is greater than 90%;
Sawdust is pulverized and obtained the sawdust powder that particle diameter is less than 1.0mm;
Take 1kg brown ocher, 2.5kg fined sulphur ore powder, 50g sawdust powder, 125g sodium metaaluminate binding agent, mix to obtain compound;
Measure 1 premium on currency and compound mix is even, obtain the composite grain thing of particle diameter 6～8mm with tablets press moulding;
Composite grain thing is dried to and after water content is less than 2%, joins in rotary kiln under nitrogen atmosphere in 800 DEG C of roasting 10min and be cooled to room temperature under nitrogen atmosphere in warm air, obtain the material with vesicular structure characteristic being formed by nanometer submicron pyrrhotite.
Fig. 9 is the XRD figure of products therefrom, and as can be seen from the figure product is taking pyrrhotite as main thing phase;
Figure 10 for the field emission scanning electron microscope image of product, as can be seen from the figure product has the vesicular structure feature of nano-micrometre level crystal particle diameter and intergranular pore.
After tested, the unit mass susceptibility of the present embodiment products therefrom is 1417 × 10
-8m
3/ kg, product specific surface area 7.3m
2/ g.Product speed ratio pyrite of chemical oxidation in water is large more than 100 times, larger more than 50 times than pyrite with the speed of reaction of heavy metal copper ion.
Claims (5)
1. a pyrite and the method for the baking mixed preparation of limonite taking pyrrhotite as the porous structure material of main thing phase, it is characterized in that: pyrite and limonite are mixed or granulation according to the ratio of mass ratio 3:1～1:1, under oxygen free condition through 550～800 DEG C of fluidized bed roastings or rotary kiln baking 5～15min, then under oxygen-free atmosphere, naturally cool to room temperature, obtain the porous structure material of wanting thing phase with pyrrhotite owner.
2. the method for the baking mixed preparation of pyrite according to claim 1 and limonite taking pyrrhotite as the porous structure material of main thing phase, is characterized in that: pyrite fragmentation, screening are obtained to the pyrite particle thing of particle size range at 0.5～0.8mm, limonite ore fragmentation, screening are obtained to the limonite particulate matter of particle size range at 0.9～4mm, described pyrite particle thing and described limonite particulate matter 3:1 in mass ratio～1:1 are mixed, under oxygen free condition in 550～800 DEG C of fluidized bed roastings or rotary kiln baking 5～15min, then under oxygen-free atmosphere, naturally cool to room temperature, particle size range occurs to change mutually in the limonite particulate matter of 0.9～4mm and forms particle size range and want the porous structure material of thing phase at 0.9～4mm with pyrrhotite owner, particle size range occurs to change mutually at the pyrite particle thing of 0.5～0.8mm and forms particle size range and want the porous structure material of thing phase at 0.5～0.8mm with pyrrhotite owner, what obtain 0.5～0.8mm and two kinds of particle size range of 0.9～4mm through screening wants the porous structure material of thing phase with pyrrhotite owner.
3. the method for the baking mixed preparation of pyrite according to claim 1 and limonite taking pyrrhotite as the porous structure material of main thing phase, is characterized in that carrying out as follows:
(1) choose the industrial flotation of sulfur concentrate powder that pyrite content is greater than 90%, take and account for the powdered biomass that described fined sulphur ore powder quality 1～3%, particle diameter are less than 1.0mm, take again the binding agent that accounts for described fined sulphur ore powder quality 2～5%, fined sulphur ore powder, powdered biomass and binding agent are mixed, obtain compound A;
(2) limonite ore fragmentation, screening are obtained to the brown ocher that particle diameter is less than 0.15mm, take and account for the powdered biomass that brown ocher quality 1～3%, particle diameter are less than 1.0mm, take again the binding agent that accounts for brown ocher quality 2～5%, brown ocher, powdered biomass and binding agent are mixed, obtain compound B;
(3) according to fined sulphur ore powder and brown ocher mass ratio 3:1～1:1, first in pan-pelletizer, add compound A balling-up to particle diameter at 3～4mm, and then progressively add compound B in pan-pelletizer, continuation balling-up at 5～8mm, obtains taking fined sulphur ore powder as internal layer, is coated with in its outside the composite grain thing of brown ocher to particle diameter;
(4) after described composite grain thing is dry under oxygen free condition in 550～800 DEG C of fluidized bed roastings or rotary kiln baking 5～15min, then under oxygen-free atmosphere, naturally cooling to room temperature, be able to the porous structure material that pyrrhotite is main thing phase.
4. the method for the baking mixed preparation of pyrite according to claim 1 and limonite taking pyrrhotite as the porous structure material of main thing phase, is characterized in that carrying out as follows:
(1) limonite ore fragmentation, screening are obtained to the limonite particulate matter that particle diameter is less than 0.15mm, pyrite is broken into the pyrite particle thing that particle diameter is 3～5mm, take and account for the powdered biomass that described limonite particulate matter quality 1～3%, particle diameter are less than 1.0mm, take again the binding agent that accounts for described limonite particulate matter quality 2～5%, mix limonite particle, biomass powder and binding agent, obtain compound C;
(2) first in pan-pelletizer, be sprinkled into pyrite particle thing, again according to pyrite particle thing and limonite particulate matter quality than 3:1～1:1 progressively add compound C balling-up to particle diameter at 5～8mm, obtain taking pyrite particle thing as internal layer, be coated with in its outside the composite grain thing of limonite;
(3) after described composite grain thing is dry under oxygen free condition in 550～800 DEG C of fluidized bed roastings or rotary kiln baking 5～15min, then under oxygen-free atmosphere, naturally cooling to room temperature, be able to the porous structure material that pyrrhotite is main thing phase.
5. the method for the baking mixed preparation of pyrite according to claim 1 and limonite taking pyrrhotite as the porous structure material of main thing phase, is characterized in that carrying out as follows:
Rear limonite ore fragmentation mistake 100 mesh sieves are obtained to brown ocher, choose the industrial flotation of sulfur concentrate powder that pyrite content is greater than 90%, particle diameter is crossed 100 mesh sieves, the mass ratio of fined sulphur ore powder and brown ocher is 3:1～1:1, take and account for described fined sulphur ore powder quality 1～3%, particle diameter is less than the powdered biomass of 1.0mm, then takes the binding agent that accounts for described fined sulphur ore powder quality 2～5%; Fined sulphur ore powder, brown ocher, powdered biomass and binding agent are mixed, then granulation is the composite grain thing of particle diameter at 5～8mm, after composite grain thing is dry under oxygen free condition in 550～800 DEG C of fluidized bed roastings or rotary kiln baking 5～15min, then under oxygen-free atmosphere, naturally cool to room temperature, be able to the porous structure material that pyrrhotite is main thing phase.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610111683.7A CN105734268B (en) | 2014-09-05 | 2014-09-05 | A kind of baking mixed method for preparing porous structure material of pyrite and limonite |
| 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 |
| CN201610111667.8A CN105734267B (en) | 2014-09-05 | 2014-09-05 | It is a kind of to pass through the baking mixed method for preparing porous structure 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 |
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| CN201610111683.7A Division CN105734268B (en) | 2014-09-05 | 2014-09-05 | A kind of baking mixed method for preparing porous structure material of pyrite and limonite |
| CN201610111693.0A Division 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 |
| CN201610111667.8A Division CN105734267B (en) | 2014-09-05 | 2014-09-05 | It is a kind of to pass through the baking mixed method for preparing porous structure material |
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| CN111876589A (en) * | 2020-08-04 | 2020-11-03 | 东北大学 | Method and device for desulfurization and reduction of sulfur-containing iron ore |
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