CN102641777A - Method for separating magnetic substances and nonmagnetic substances - Google Patents
Method for separating magnetic substances and nonmagnetic substances Download PDFInfo
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- CN102641777A CN102641777A CN2012101320864A CN201210132086A CN102641777A CN 102641777 A CN102641777 A CN 102641777A CN 2012101320864 A CN2012101320864 A CN 2012101320864A CN 201210132086 A CN201210132086 A CN 201210132086A CN 102641777 A CN102641777 A CN 102641777A
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Abstract
The invention discloses a method for separating magnetic substances and nonmagnetic substances, which can effectively avoid magnetic reuniting and magnetic entrainment and adopts a dry type magnetic separator. The dry type magnetic separator comprises a casing, a rotating shaft connected with a rotary driving device is arranged in the casing, a spiral conveying blade is arranged on the surface of the rotating shaft, a magnetic device is arranged in the rotating shaft, and the magnetic action range of the magnetic device can extends out of the rotating shaft and at least extends for certain distance along the length direction of the rotating shaft. A material inlet and a magnetic substance outlet are respectively arranged at the positions close to two ends of the casing, and a nonmagnetic substance blanking port is arranged between the material inlet and the magnetic substance outlet on the casing. Materials are guided into the dry type magnetic separator from the material inlet for magnetic separation, and then separated magnetic substances and nonmagnetic substances are obtained at the magnetic substance outlet and the nonmagnetic substance blanking port. The method effectively avoids the phenomena of magnetic reuniting and magnetic entrainment.
Description
Technical field
The present invention relates to a kind of method that realizes that magnetic is separated with namagnetic substance.
Background technology
(TFe is about 55% to the vanadium titano-magnetite of Panzhihua City, TiO
2Be 8～12%) aboundresources, but it utilizes effect bad.At present, the approach that utilizes of vanadium titano-magnetite mainly is to add the molten point-score of electric furnace at rotary hearth furnace reduction behind blast furnace process method and the pressure ball behind the sintering.The blast furnace process method is that temperature is controlled at 1400～1600 ℃, adds vanadic-titanomagnetite sintering material, fuel, flux etc. and smelts, and obtains molten iron.The deficiency of the method can only be utilized the iron in the vanadium titano-magnetite exactly; Gone and titanium dioxide enters into blast furnace slag fully, in blast furnace slag, the content of titanium dioxide also has only twenties percent; Contain impurity such as a lot of Si, Ca, Mg simultaneously; Be not easy to separate very much, a large amount of titanium dioxide resources be " discarded " with blast furnace slag, loss in vain a large amount of titanium resources; Also have furnace temperature high in addition, the bigger deficiency that waits of energy consuming ratio.And in rotary hearth furnace, utilize vanadium titano-magnetite to reduce, can obtain the titanium ore of grade about 50% through the molten method of producing molten iron and titanium enrichment of dividing of electric furnace smelting then.Though this method makes vanadium titano-magnetite obtain comprehensive utilization, this production technology must be made ball when producing, and the hardness of the pelletizing of being done is also very high; And the furnace temperature of rotary hearth furnace generally is controlled at about 1400 ℃; But degree of metalization can only reach about 70%, also will pass through electric furnace further reduction and molten branch simultaneously, and temperature is at 1700～1800 ℃; Energy consumption is bigger, and production cost is also higher.
Therefore, seek a kind of iron that can utilize in the vanadium titano-magnetite, can reclaim the titanium resource in the vanadium titano-magnetite again, the new method that makes vanadium titano-magnetite obtain fully utilizing, instant pendulum people in face of.Problem hereto, the someone has proposed to realize with direct reduction iron making technology the smelting of vanadium titano-magnetite.Such as, just proposed to adopt kiln process and rotary hearth furnace method to carry out the technology of direct reduction of V-Ti magnetite ironmaking in " direct reduction iron making state of art and Panzhihua vanadium titano-magnetite treatment process are selected, Yang Baoxiang; Panzhihua science and technology and information; the 3rd phase, the 31st volume, 2006 " literary composition.Do not use tunnel cave to carry out the direct reduction of vanadium titano-magnetite but mention in this article.Though tunnel kiln direct reduced ironmaking is a kind of ancient method, and at present the raw material that adopts of this method all be mostly iron-holder at common iron ore concentrate or iron scale 60% or more, reduction afterwards in the gained iron powder TFe content lower.
Summary of the invention
The present invention's technical problem at first to be solved provides a kind of smelting process that can effectively utilize the vanadium titano-magnetite of iron in the vanadium titano-magnetite, titanium resource.Secondly, the present invention also will provide a kind of method that can effectively avoid dry-type magnetic extractor that magnetic coagulation and magnetic carries phenomenon secretly and realization magnetic to separate with namagnetic substance.
The step that the smelting process of vanadium titano-magnetite of the present invention comprises is: a, with pack into reduction jar of vanadium titano-magnetite and carbonaceous reducing agent layering; B, the kiln car that will carry reduction jar place and carry out reduction reaction in the tunnel cave; In the reduction jar, take out the reduction ingot and it is carried out fragmentation, screening after c, reaction are accomplished; D, to the screening after material carry out magnetic separation, the magnetisable material of gained is an iron powder, namagnetic substance titanium enrichment.
The implication of above-mentioned " layering " is meant that vanadium titano-magnetite only contacts with carbonaceous reducing agent but do not mix.This pack into the mode of reduction jar of vanadium titano-magnetite and carbonaceous reducing agent layering not only can be saved the operation of vanadium titano-magnetite being carried out pressure ball or briquetting; And can also avoid mixing of carbonaceous reducing agent and vanadium titano-magnetite, for follow-up guarantee magnetic separation precision creates conditions.The mode of above-mentioned this layer-by-layer distribution combined with the tunnel kiln reduction technology, and TFe content and MFe content all can reach about 90% even higher in the resulting iron powder, and effect is unexpected, and TiO in the titanium enrichment that obtains
2Can reach more than 35%, reach the taste of titanium chats, can be used as the raw material of producing titanium white powder.In addition, also contain elements such as Ti, V in the gained iron powder, can also improve the performance such as intensity, wearability of material when this iron powder is used for powder metallurgy.In addition, tunnel kiln reduction also has the effect that cuts down the consumption of energy.In a word, the smelting process of vanadium titano-magnetite of the present invention can realize the comprehensive utilization of vanadium titano-magnetite.
Further be, reduction reaction comprises preheating, reduction, cooling three phases, and wherein: the time of warm-up phase is 13～18 hours, and preheat temperature is controlled at 120～950 ℃; The time of reduction phase is 30～40 hours, and reduction temperature is controlled at 900～1100 ℃.Wherein, preferred reduction temperature should be controlled at less than in 1000 ℃ the scope, can be issued to same reduction effect at less temperature conditions like this, reaches purpose of energy saving.
Further be; During implementation step a, the mould of will feeding inserts in the reduction jar, and this charging mould has the sidewall of two sides each interval at least; Constitute reduction material charging hopper between this both sidewalls; Constitute the reducing agent charging hopper between the inwall of sidewall and reduction jar, after vanadium titano-magnetite and carbonaceous reducing agent are filled in said reduction material charging hopper and the reducing agent charging hopper respectively, extract out between charging mould vanadium titano-magnetite and the carbonaceous reducing agent then to stay and reduce in the jar with the form of layering.Adopt above-mentioned moulds fed prodigiosin enough easily to realize, and vanadium titano-magnetite is more coated by carbonaceous reducing agent pack into reduction jar of vanadium titano-magnetite and carbonaceous reducing agent layering.Obviously, the sidewall of described two sides at least each interval preferably constitutes nested each other concentric annular structure, has reached reduction effect preferably.
Certainly, except that above-mentioned charging mould, also can make between vanadium titano-magnetite and the carbonaceous reducing agent and stay in the reduction jar with layered morphology through other ways.Such as, a kind of simple way is in reduction jar, the dividing plate that can extract out to be installed, and pours vanadium titano-magnetite and carbonaceous reducing agent into the dividing plate both sides respectively earlier, extracts dividing plate then out and promptly reaches vanadium titano-magnetite is only contacted but unmixed effect with carbonaceous reducing agent.
Further be preferably vanadium titano-magnetite to be carried out processed before the step a and make its water content (weight ratio) below 3%.Water content when vanadium titano-magnetite enters factory is generally 5～10%, through drying or dewatering type such as oven dry makes the water content of vanadium titano-magnetite be lower than 3%, both has been convenient to tinning, also helps the reduction of vanadium titano-magnetite, reduces the use amount of reducing agent.
Can adopt multiple magnetic separation mode during implementation step d, such as adopting traditional cartridge type dry-type magnetic extractor or wet magnetic separator.The cartridge type dry-type magnetic extractor is easy to generate magnetic coagulation and magnetic is carried phenomenon secretly; And moisture in the product that wet magnetic separator obtains, must carry out processed, thereby improve production cost.Therefore; The present invention has adopted a kind of newly-designed dry-type magnetic extractor when implementation step d; This dry-type magnetic extractor has a shell, is provided with the rotating shaft that is connected with rotating driving device in this shell, and the surface of this rotating shaft is provided with spiral conveying blade; The inside of rotating shaft is provided with magnetic devices, and the penetrable rotating shaft of magnetic action scope of this magnetic devices is also extended certain distance along the length direction of rotating shaft at least; Position near these rotating shaft two ends on the said shell is respectively equipped with charging aperture and magnetisable material discharging opening, between said charging aperture and magnetisable material discharging opening, is provided with the namagnetic substance blanking port on the shell.The method for using of this dry-type magnetic extractor is material to be imported dry-type magnetic extractor from charging aperture carry out after the magnetic separation promptly respectively from magnetisable material discharging opening and magnetisable material and namagnetic substance after the namagnetic substance blanking port obtains separating.
Compare with traditional dry-type magnetic extractor, the mode that sorts of dry-type magnetic extractor of the present invention is different fully.Traditional dry-type magnetic extractor be cylinder radially 180 degree scopes sort; The application's dry-type magnetic extractor then promotes material along the rotating shaft axial advancement and constantly overturn and beat through spiral conveying blade; Material advances with helical trajectory to be close on the surface around the shaft in this process; Magnetisable material is drawn onto the rotating shaft surface, and namagnetic substance separates with magnetisable material under action of centrifugal force, thereby reaches the sorting result of magnetisable material and namagnetic substance.Based on above-mentioned principle, dry-type magnetic extractor of the present invention can improve dry separation effect and efficient, and has effectively avoided magnetic coagulation and magnetic to carry phenomenon secretly.Obviously, dry-type magnetic extractor of the present invention can not only be used for v-bearing titanomagnetite smelting method of the present invention, can be used for the sorting of other magnetic materials equally.
Further be, said magnetic devices is connected with the rotational driving device that this magnetic devices is circumferentially rotated along rotating shaft, and the rotation direction of this magnetic devices and velocity of rotation all can be regulated through this rotational driving device.For this dry-type magnetic extractor of the present invention; The absolute rotating speed of rotating shaft can not be too fast, otherwise the centrifugal force of material is bigger, possibly make magnetisable material break away from the rotating shaft surface; Also can reduce simultaneously the time of contact in material and magnetic field; These all can cause adverse effect to magnetic separation, and therefore, preferably the absolute rotating speed with rotating shaft is controlled in the certain limit.Yet; Often this material there is different requirement with respect to the reversal rate in magnetic field during the different material magnetic separation; Such as requiring material very fast sometimes with respect to the reversal rate in magnetic field; Sometimes require material slower again with respect to the reversal rate in magnetic field; At this moment, owing to be subject to the adjustment of the absolute rotating speed of rotating shaft, the proposition of the invention property is through being connected magnetic devices and reaching the purpose of adjustment material with respect to the magnetic field reversal rate by the rotation direction of this rotational driving device adjusting magnetic devices and the technological means of velocity of rotation with rotational driving device.
To the adjusted design of rotational driving device following three kinds of patterns: first kind of pattern: magnetic devices is fixed; Second kind of pattern: magnetic devices and rotating shaft are rotated in the same way; The third pattern: magnetic devices and rotating shaft reverse rotation.When the material treating capacity adopts first kind of pattern more after a little while; Situation adopts second kind of pattern when the material treating capacity is moderate; When the material treating capacity adopts the third pattern more for a long time.
Further be; Said magnetic devices comprises the mandrel that is sleeved in the rotating shaft and is connected with rotational driving device; This mandrel surface is provided with the magnetic patch of array along the mandrel circumferential array; Every group of magnetic patch is made up of along the mandrel axially-aligned and with magnetic pole magnetic patch outwardly several, outwardly magnetic pole opposite pole each other between the two adjacent groups magnetic patch.Said structure is a kind of preferred version of magnetic devices among the present invention, is characterized in that the magnetic patch arrangement form can guarantee the density and the uniformity in magnetic field.
Further be between magnetic devices and rotating shaft, also to be set with protective casing.The main effect of protective casing is to prevent that rotating shaft and magnetic devices from bumping.
Further be, also be provided with blow device in the said shell, this blow device has several between outer casing inner wall and rotating shaft and point to the air nozzle of this rotating shaft.When magnetic separation, material is carried out jet purging through these air nozzles.Compressed air blows away the namagnetic substance of different-grain diameter in the process that sorted materials is constantly rolled in rotating shaft and overturn, and magnetisable material is purified, and has further improved efficiency of magnetic separation.
Further be, between the inwall of said shell and rotating shaft, be provided with the air nozzle along the rotating shaft circumferential array of array, every group of air nozzle is made up of several air nozzles along the rotating shaft axially-aligned.Obviously, layout can make air nozzle be evenly distributed like this, improves to purge effect.
Further be that said spiral conveying blade is processed by non-magnet material.Thus, can avoid magnetisable material to stick on the spiral conveying blade and under the promotion of spiral conveying blade, do not travel forward.
Further be that the helical angle of said spiral conveying blade is 65～75 degree.The spirals speed of rotating shaft surface magnetism material reduces with the increase of the helical angle of spiral conveying blade; This dry type magnetic separator helical angle is bigger; So the material pace is also less; Magnetisable material and magnetic field are longer relatively time of contact, be fit to separate that magnetic wraps seriously, the stronger material of electrostatic field between micel, so efficiency of magnetic separation is high.
In addition, also find through test, for the application's this dry-type magnetic extractor; Material carefully sorts more more easily, but when the material fineness reached certain upper limit, it was little to the influence of separating effect to continue to improve the material fineness; But can improve the cost of grinding, therefore, the granularity that the application's suggestion will be carried out the material of magnetic separation is controlled at-250～400 orders; The dry separation effect can either be guaranteed, the grinding cost can be controlled again.
The method that realization magnetic of the present invention is separated with namagnetic substance; Adopt dry-type magnetic extractor; This dry-type magnetic extractor comprises shell, is provided with the rotating shaft that is connected with rotating driving device in this shell, and the surface of this rotating shaft is provided with spiral conveying blade; The inside of rotating shaft is provided with magnetic devices, and the penetrable rotating shaft of magnetic action scope of this magnetic devices is also extended certain distance along the length direction of rotating shaft at least; Position near these rotating shaft two ends on the said shell is respectively equipped with charging aperture and magnetisable material discharging opening, between said charging aperture and magnetisable material discharging opening, is provided with the namagnetic substance blanking port on the shell; Material is imported dry-type magnetic extractor from charging aperture to carry out after the magnetic separation promptly respectively from magnetisable material discharging opening and magnetisable material and namagnetic substance after the namagnetic substance blanking port obtains separating.
For said method further be; Said magnetic devices is connected with the rotational driving device that this magnetic devices is circumferentially rotated along rotating shaft; And the rotation direction of this magnetic devices and velocity of rotation all can be regulated through this rotational driving device, and its adjusting comprises following three kinds of patterns: first kind of pattern: magnetic devices is fixed; Second kind of pattern: magnetic devices and rotating shaft are rotated in the same way; The third pattern: magnetic devices and rotating shaft reverse rotation; When the material treating capacity adopts first kind of pattern more after a little while; Situation adopts second kind of pattern when the material treating capacity is moderate; When the material treating capacity adopts the third pattern more for a long time.
For said method further be; Said magnetic devices comprises the mandrel that is sleeved in the rotating shaft and is connected with rotational driving device; This mandrel surface is provided with the magnetic patch of array along the mandrel circumferential array; Every group of magnetic patch is made up of along the mandrel axially-aligned and with magnetic pole magnetic patch outwardly several, outwardly magnetic pole opposite pole each other between the two adjacent groups magnetic patch.
Further be between magnetic devices and rotating shaft, also to be set with protective casing for said method.
For said method further be, be provided with blow device in the said shell, this blow device has several between outer casing inner wall and rotating shaft and point to the air nozzle of this rotating shaft, when magnetic separation, through these air nozzles material is carried out jet purging.
For said method further be, between the inwall of said shell and rotating shaft, be provided with the air nozzle along the rotating shaft circumferential array of array, every group of air nozzle is made up of several air nozzles along the rotating shaft axially-aligned.
Further be that the spout direction of said air nozzle and material are acute angle along the angle between the axially-movable direction of rotating shaft for said method.
Further be that the helical angle of said spiral conveying blade is 65～75 degree for said method.
Further be that said spiral conveying blade is processed by non-magnet material for said method.
Further be that the granularity of carrying out the material of magnetic separation is-250～400 orders for said method.
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further explanation.Aspect that the application adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize through the application's practice.
Description of drawings
Fig. 1 for the application feed mould with the reduction jar the assembling sketch map.
Fig. 2 is the structural representation of the application's dry-type magnetic extractor.
Fig. 3 be among Fig. 2 A-A to cutaway view.
Fig. 4 is the graph of a relation of the application's raw meal particle size and separating effect.
The specific embodiment
At first dry-type magnetic extractor of the present invention is described below.This dry-type magnetic extractor can be used for the sorting of other magnetic materials except being used for v-bearing titanomagnetite smelting method of the present invention.
Like Fig. 2, shown in 3, shell 8a is a round tube shape, and its two ends are provided with a rotating shaft 8b coaxial with shell 8a through the end cap sealing in the shell 8a, and the two ends rolling bearing of this rotating shaft 8b is on the two end cap of shell 8a, and its medial end portions is connected with a rotary electric machine; Rotating shaft 8b is the hollow-core construction of being processed by permeability magnetic material, and its surface is provided with by non-magnet material and processes spiral conveying blade 8e, and its inside is with a mandrel 8g, and the end of this mandrel 8g is connected with another rotary electric machine; Be provided with the magnetic patch 8h of array along mandrel 8g circumferential array on mandrel 8g surface; Every group of magnetic patch 8h is made up of along mandrel 8g axially-aligned and with magnetic pole magnetic patch 8h outwardly several; Outwardly magnetic pole opposite pole each other between the two adjacent groups magnetic patch 8h, wherein, mandrel 8g is a splined shaft; These magnetic patch 8h just is installed in the keyway of splined shaft, so that fixing; Magnetic patch 8h and rotating shaft 8b inwall bump when preventing that mandrel 8g and rotating shaft 8b from relatively rotating, and between these magnetic patch 8h and rotating shaft 8b, also are set with protective casing 8i, and protective casing 8i is processed by permeability magnetic material equally; Charging aperture 8d is arranged on shell 8a top and near the front end of rotating shaft 8b, and magnetisable material discharging opening 8e is arranged on shell 8a below and near the rear end of rotating shaft 8b, and namagnetic substance blanking port 8f is arranged on shell 8a below but equally between the front and back end of rotating shaft 8b; In the end cap of shell 8a one end, be provided with air chamber 81; This air chamber 81 links to each other through the pipeline compressed gas source outside with being positioned at dry-type magnetic extractor; Between shell 8a inwall and rotating shaft 8b, be provided with several in the dry-type magnetic extractor along rotating shaft 8b circumferential array and along the axially extended tracheae 8k of rotating shaft 8b; These tracheaes 8k all is communicated with air chamber 81, and each root tracheae 8k is provided with several air nozzle 8j along rotating shaft 8b axially-aligned, and the spout direction of these air nozzles 8j and material are acute angle along the angle between the axially-movable direction of rotating shaft 8b; So that the air-flow that blows out neither hinders advancing of material, the non-magnetic material that plays again on the countershaft 8b simultaneously carries out the effect that wind is swept; In addition, the helical angle of said spiral conveying blade 8e (angle between helix and the rotating shaft 8b) is 65～75 degree.
The smelting process that adopts above-mentioned dry-type magnetic extractor to carry out vanadium titano-magnetite is: at first, vanadium titano-magnetite is carried out processed make its water content (weight ratio) below 3%; Use charging mould shown in Figure 1 to feed then; The mould 1 that is about to feed inserts in the reduction jar 7, and this charging mould 1 has the sidewall 2 of two sides each interval, and this both sidewalls 2 constitutes nested each other concentric annular structure; Like this; Constitute reduction material charging hopper 3 between this both sidewalls 2 and be annular, and between the inwall of sidewall 2 and reduction jars 7 institute to constitute reducing agent charging hopper 5 also be annular, after vanadium titano-magnetite 3 and carbonaceous reducing agent 4 are filled in said reduction material charging hopper 3 and the reducing agent charging hopper 5 respectively; Extract out between charging mould 1 vanadium titano-magnetite 3 and the carbonaceous reducing agent 4 and then stay in the reduction jar 7 with the form of layering; And then at vanadium titano-magnetite 3 upper berth lid layer carbonaceous reducing agents 4, wherein, carbonaceous reducing agent 4 can adopt coal, coke, wood to cut or plant ash etc.; The kiln car that just carries the reduction jar afterwards places and carries out reduction reaction in the tunnel cave, and reduction reaction comprises preheating, reduction, cooling three phases, and wherein, the time of warm-up phase is 13～18 hours, and preheat temperature is controlled at 120～950 ℃; The time of reduction phase is 30～40 hours, and reduction temperature is controlled at 900～1100 ℃, and preferred reduction temperature should be less than 1000 ℃; The cooling back is taken out the reduction ingot and it is carried out fragmentation, screening in the reduction jar, makes the raw meal particle size of treating magnetic separation in-250～400 purpose scopes; Through above-mentioned dry-type magnetic extractor material is carried out magnetic separation then; Its process is that material is imported dry-type magnetic extractor from charging aperture 8d; After this; Material is in the promotion lower edge rotating shaft 8b of spiral conveying blade 8e axial advancement and constantly overturn and beat, and material advances with helical trajectory to be close on the surface around the shaft in this process, and magnetisable material is drawn onto rotating shaft 8b surface and continues reach and the final magnetisable material discharging opening 8e that gets into; Namagnetic substance then separates with magnetisable material under the effect of centrifugal force and gas purging, enters into namagnetic substance blanking port 8f; The magnetisable material of gained is an iron powder, namagnetic substance titanium enrichment, and this iron powder can obtain high-quality, high strength, wear-resisting powder used in metallurgy iron powder again after the smart reduction of secondary, and Ti0 in the titanium enrichment that obtains
2Can reach more than 35%, reach the taste of titanium chats, can be used as the raw material of producing titanium white powder.
As shown in Figure 4, for the application's this dry-type magnetic extractor, but when the material fineness reaches 250 orders; The efficiency of separation reaches 80%; Continue and improve the corresponding raising of the material fineness efficiency of separation, but when the material fineness reached the 320 order left and right sides, continuing to improve the material fineness there was decline slightly on the contrary to separating effect; When the material fineness reaches 400 orders, can increase the cost of grinding.After taking all factors into consideration, the granularity that will carry out the material of magnetic separation is controlled at-250～400 orders, can either guarantee the dry separation effect, can control the grinding cost again.Certainly, best choice is that granularity with material is controlled at about 320 orders.
Embodiment
Get the Panzhihua Region vanadium titano-magnetite, the TFe grade is 60.23%, TiO
2Be 8.64%, moisture content is controlled at＜3%, packs in the lump in the reduction jar with carbonaceous reducing agent then, and granularity is less than 3mm; Refill on the kiln car, push tunnel cave and reduce, first preheating 16 hours is again through reduction; Reduction temperature is 980 ℃, 35 hours recovery times, unload jar, fragmentation, ball milling and magnetic separation after the kiln discharge cooling, and the magnetisable material that the result obtains is an iron powder; Its TFe is 93.64%, and MFe is 92.35%, and productive rate is 77.47%, and the rate of recovery is 95.30%; Namagnetic substance is the titanium enrichment, its TiO
2Be 35.34%, the rate of recovery is 82.78%.Two kinds of materials have reached the quality index of reducing agent with iron powder and titanium chats respectively, and the rate of recovery is also higher, have realized the preliminary target of vanadium titano-magnetite comprehensive utilization.After this, the reduced iron powder after once reducing is carried out the smart reduction of gas base secondary again, this method of reducing is under hot conditions, to reduce with reducing gas and falling property gas; The raw material of the process gas that is adopted is a liquefied ammonia, and ammonia generates nitrogen and hydrogen through the heating pyrolytic; The nitrogen chemical property is more stable, can be used as protective gas, and hydrogen can be used as reducibility gas; Certainly, reducibility gas can also be produced through natural gas.Under the smart reducing condition of this gas base secondary, obtain TFe at the high-quality more than 98.5%, high strength, wear-resisting powder used in metallurgy iron powder.
Claims (10)
1. realize the method that magnetic is separated with namagnetic substance; Adopt dry-type magnetic extractor; This dry-type magnetic extractor comprises shell (8a), is provided with the rotating shaft (8b) that is connected with rotating driving device in this shell (8a), and it is characterized in that: the surface of this rotating shaft (8b) is provided with spiral conveying blade (8e); The inside of rotating shaft (8b) is provided with magnetic devices, and the penetrable rotating shaft of magnetic action scope (8b) of this magnetic devices is also extended certain distance along the length direction of rotating shaft (8b) at least; The position that said shell (8a) is gone up near this rotating shaft (8a) two ends is respectively equipped with charging aperture (8d) and magnetisable material discharging opening (8e), is positioned on the shell (8a) between said charging aperture (8d) and the magnetisable material discharging opening (8e) to be provided with namagnetic substance blanking port (8f); Material is imported dry-type magnetic extractor from charging aperture (8d) to carry out after the magnetic separation promptly respectively from magnetisable material discharging opening (8e) and magnetisable material and namagnetic substance after namagnetic substance blanking port (8f) obtains separating.
2. the method that realization magnetic as claimed in claim 1 is separated with namagnetic substance; It is characterized in that: said magnetic devices is connected with the rotational driving device that this magnetic devices is circumferentially rotated along rotating shaft (8b); And the rotation direction of this magnetic devices and velocity of rotation all can be regulated through this rotational driving device, and its adjusting comprises following three kinds of patterns: first kind of pattern: magnetic devices is fixed; Second kind of pattern: magnetic devices and rotating shaft (8b) are rotated in the same way; The third pattern: magnetic devices and rotating shaft (8b) reverse rotation; When the material treating capacity adopts first kind of pattern more after a little while; Situation adopts second kind of pattern when the material treating capacity is moderate; When the material treating capacity adopts the third pattern more for a long time.
3. the method that realization magnetic as claimed in claim 2 is separated with namagnetic substance; It is characterized in that: said magnetic devices comprises the mandrel (8g) that is sleeved in the rotating shaft (8b) and is connected with rotational driving device; This mandrel (8g) surface is provided with the magnetic patch (8h) of array along mandrel (8g) circumferential array; Every group of magnetic patch (8h) is made up of along mandrel (8g) axially-aligned and with magnetic pole magnetic patch (8h) outwardly several, outwardly magnetic pole opposite pole each other between the two adjacent groups magnetic patch (8h).
4. the method that realization magnetic as claimed in claim 3 is separated with namagnetic substance is characterized in that: between magnetic devices and rotating shaft (8b), also be set with protective casing (8i).
5. the method for separating with namagnetic substance like the described realization magnetic of any claim in the claim 1 to 4; It is characterized in that: be provided with blow device in the said shell (8a); This blow device has several air nozzles (8j) that is positioned between shell (8a) inwall and the rotating shaft (8b) and points to this rotating shaft (8b), when magnetic separation, through these air nozzles (8j) material is carried out jet purging.
6. the method that realization magnetic as claimed in claim 5 is separated with namagnetic substance; It is characterized in that: between the inwall of said shell (8a) and rotating shaft (8b), be provided with the air nozzle (8j) along rotating shaft (8b) circumferential array of array, every group of air nozzle (8j) is made up of several air nozzles (8j) along rotating shaft (8b) axially-aligned.
7. the method that realization magnetic as claimed in claim 5 is separated with namagnetic substance is characterized in that: the spout direction of said air nozzle (8j) and material are acute angle along the angle between the axially-movable direction of rotating shaft (8b).
8. the method for separating with namagnetic substance like the described realization magnetic of any claim in the claim 1 to 4 is characterized in that: the helical angle of said spiral conveying blade (8e) is 65～75 degree.
9. the method for separating with namagnetic substance like the described realization magnetic of any claim in the claim 1 to 4, it is characterized in that: said spiral conveying blade (8e) is processed by non-magnet material.
10. the method for separating with namagnetic substance like the described realization magnetic of any claim in the claim 1 to 4 is characterized in that: the granularity of carrying out the material of magnetic separation is-250～400 orders.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103920885A (en) * | 2014-04-30 | 2014-07-16 | 攀枝花市尚亿科技有限责任公司 | Secondary iron ore concentrate recovery technology |
| CN105392566A (en) * | 2013-07-25 | 2016-03-09 | 乐玛普洛责任有限公司 | Filter device and method for removing magnetizable particles from a fluid |
| CN106241232A (en) * | 2016-09-22 | 2016-12-21 | 无锡大功机械制造有限公司 | A kind of metal recovery auger conveyor |
| CN106269225A (en) * | 2016-08-29 | 2017-01-04 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of flyash magnetic wind is combined and is selected ferrum equipment and using method thereof |
| CN106269229A (en) * | 2016-09-22 | 2017-01-04 | 无锡大功机械制造有限公司 | A kind of electromagnetic type metal recovery auger conveyor |
| CN106287731A (en) * | 2016-09-22 | 2017-01-04 | 无锡大功机械制造有限公司 | A kind of electromagnetic type sub-material auger conveyor |
| CN106439827A (en) * | 2016-09-22 | 2017-02-22 | 无锡大功机械制造有限公司 | Material-separating spiral conveyor |
| CN106799304A (en) * | 2016-11-30 | 2017-06-06 | 河池市技术开发中心 | A kind of sorting process of new concentrate magnetic separator |
| WO2017168182A1 (en) * | 2016-04-01 | 2017-10-05 | Romar International Limited | Apparatus and method for removing magnetic particles from liquids or slurries from an oil or gas process |
| CN108176499A (en) * | 2017-12-27 | 2018-06-19 | 西南石油大学 | A kind of novel double-helix blade electromagnetic separator |
| CN110508379A (en) * | 2019-09-02 | 2019-11-29 | 重庆春江镀膜玻璃有限公司 | A kind of crushing device of tempered glass |
| CN111408474A (en) * | 2019-01-04 | 2020-07-14 | 苏州银马机械设备有限公司 | Spiral magnetic separation device |
| CN113601486A (en) * | 2021-08-16 | 2021-11-05 | 北京交通大学 | Device and method for precisely sorting non-magnetic materials based on magnetic liquid first-order buoyancy principle |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105392566A (en) * | 2013-07-25 | 2016-03-09 | 乐玛普洛责任有限公司 | Filter device and method for removing magnetizable particles from a fluid |
| CN105392566B (en) * | 2013-07-25 | 2017-09-19 | 乐玛普洛责任有限公司 | Filter and the method that magnetic particle is removed from fluid |
| CN103920885B (en) * | 2014-04-30 | 2017-03-08 | 攀枝花市尚亿科技有限责任公司 | Secondary iron ore concentrate recovery process |
| CN103920885A (en) * | 2014-04-30 | 2014-07-16 | 攀枝花市尚亿科技有限责任公司 | Secondary iron ore concentrate recovery technology |
| US10961792B2 (en) | 2016-04-01 | 2021-03-30 | Romar International Limited | Apparatus and method for removing magnetic particles from liquids or slurries from an oil or gas process |
| WO2017168182A1 (en) * | 2016-04-01 | 2017-10-05 | Romar International Limited | Apparatus and method for removing magnetic particles from liquids or slurries from an oil or gas process |
| CN106269225A (en) * | 2016-08-29 | 2017-01-04 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of flyash magnetic wind is combined and is selected ferrum equipment and using method thereof |
| CN106241232A (en) * | 2016-09-22 | 2016-12-21 | 无锡大功机械制造有限公司 | A kind of metal recovery auger conveyor |
| CN106269229A (en) * | 2016-09-22 | 2017-01-04 | 无锡大功机械制造有限公司 | A kind of electromagnetic type metal recovery auger conveyor |
| CN106287731A (en) * | 2016-09-22 | 2017-01-04 | 无锡大功机械制造有限公司 | A kind of electromagnetic type sub-material auger conveyor |
| CN106439827A (en) * | 2016-09-22 | 2017-02-22 | 无锡大功机械制造有限公司 | Material-separating spiral conveyor |
| CN106799304A (en) * | 2016-11-30 | 2017-06-06 | 河池市技术开发中心 | A kind of sorting process of new concentrate magnetic separator |
| CN108176499A (en) * | 2017-12-27 | 2018-06-19 | 西南石油大学 | A kind of novel double-helix blade electromagnetic separator |
| CN111408474A (en) * | 2019-01-04 | 2020-07-14 | 苏州银马机械设备有限公司 | Spiral magnetic separation device |
| CN110508379A (en) * | 2019-09-02 | 2019-11-29 | 重庆春江镀膜玻璃有限公司 | A kind of crushing device of tempered glass |
| CN110508379B (en) * | 2019-09-02 | 2021-04-06 | 重庆春江镀膜玻璃有限公司 | Toughened glass's breaker |
| CN113601486A (en) * | 2021-08-16 | 2021-11-05 | 北京交通大学 | Device and method for precisely sorting non-magnetic materials based on magnetic liquid first-order buoyancy principle |
| CN113601486B (en) * | 2021-08-16 | 2022-06-28 | 北京交通大学 | Device and method for precisely sorting non-magnetic materials based on first-order buoyancy principle of magnetic liquid |
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