CN108149009A - The method for handling red mud - Google Patents

The method for handling red mud Download PDF

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Publication number
CN108149009A
CN108149009A CN201711248906.5A CN201711248906A CN108149009A CN 108149009 A CN108149009 A CN 108149009A CN 201711248906 A CN201711248906 A CN 201711248906A CN 108149009 A CN108149009 A CN 108149009A
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red mud
slag
high temperature
mixed material
mixed
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Inventor
孙辉
边妙莲
马冬阳
陈士朝
苏双青
李亚奇
曹志成
吴道洪
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Jiangsu Province Metallurgical Design Institute Co Ltd
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Jiangsu Province Metallurgical Design Institute Co Ltd
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Priority to CN201711248906.5A priority Critical patent/CN108149009A/en
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/04—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C13/00—Fibre or filament compositions
    • C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Metallurgy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Glass Compositions (AREA)

Abstract

The invention discloses the method for processing red mud, this method includes：Red mud is mixed with coal dust, to obtain the first mixed material；First mixed material is subjected to forming processes, to obtain mixing pelletizing；Processing is dried in mixing pelletizing, to obtain dry pelletizing；Dry pelletizing is subjected to melt process and slag sluicing system processing successively, to obtain high temperature red mud slag and iron liquid；High temperature red mud slag is mixed with dolomite and silica, to obtain the second mixed material；High temperature modifier treatment is carried out to the second mixed material using pure oxygen in high pressure jet stream, to obtain melting slag liquid；And carry out being centrifuged into fine processing by melting slag liquid and be blown binding agent and dust laying oil, to obtain rock wool fibers.This method can effectively utilize the rock wool fibers that metallurgical waste red mud prepares high-quality, open the new way of red mud resource utilization, have significant economic benefit and environmental benefit.

Description

The method for handling red mud
Technical field
The present invention relates to building material field, specifically, the method the present invention relates to processing red mud.
Background technology
Red mud is a kind of solid waste extracted from bauxite and obtained after aluminium oxide, high according to aluminium grade in bauxite Treatment process is different used by low, and red mud can be divided into Bayer process red mud and red mud from sintering process again, and Bayer process red mud exists in recent years Ratio in the red mud total amount in China is gradually increasing.
About 30,000,000 tons of the red mud that China generates every year at present, a large amount of red mud pilling occupies a large amount of soil, due to Containing a large amount of basic anhydride in red mud, serious harm is caused to underground water.Red mud has the characteristics that high calcium, high silicon, Available for producing clinker, however, since red mud neutral and alkali oxide content is higher, make its profit in clinker is produced It is not high with rate.By red mud for blast furnace ironmaking process, the basic anhydride in red mud can cause furnace lining Eroded, and due to Titanium oxide content is higher in red mud, often increases slag viscosity, and mobility is deteriorated, and causes blast furnace operating difficult.
Therefore, the means of existing processing red mud still have much room for improvement.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention One purpose is to propose a kind of method for handling red mud.This method can effectively utilize metallurgical waste red mud and prepare high-quality Rock wool fibers, open the new way of red mud resource utilization, there is significant economic benefit and environmental benefit.
In one aspect of the invention, the present invention proposes a kind of method for handling red mud.According to an embodiment of the invention, This method includes：(1) red mud is mixed with coal dust, to obtain the first mixed material；(2) first mixed material is carried out Forming processes, to obtain mixing pelletizing；(3) processing is dried in the mixing pelletizing, to obtain dry pelletizing；(4) The dry pelletizing is subjected to melt process and slag sluicing system processing successively, to obtain high temperature red mud slag and iron liquid；(5) will The high temperature red mud slag is mixed with dolomite and silica, to obtain the second mixed material；(6) it is penetrated using pure oxygen in high pressure Stream carries out high temperature modifier treatment to second mixed material, to obtain melting slag liquid；And (7) by it is described melting slag liquid into Row is centrifuged into fine processing and is blown binding agent and dust laying oil, to obtain rock wool fibers.
The method of processing red mud according to embodiments of the present invention, by by after red mud and coal dust mixed-forming, by what is obtained Processing is dried in mixing pelletizing, obtains dry pelletizing, and then while will dry pelletizing progress melt process, realize slag iron Separation, respectively obtains high temperature red mud slag and iron liquid；High temperature red mud slag and dolomite and silica are subsequently mixed to get second Mixed material, and high temperature modifier treatment is carried out to the second mixed material using pure oxygen in high pressure jet stream, obtain melting slag liquid；Pass through again Melting slag liquid is carried out being centrifuged into fine processing, liquid slag liquid is made to be dropped on Centrifugal rolling, through centrifugal action into fibre, and is blown bonding After agent and dust laying oil, rock wool fibers product is prepared.This method can effectively utilize metallurgical waste red mud and prepare height as a result, The rock wool fibers of quality open the new way of red mud resource utilization, have significant economic benefit and environmental benefit.
In addition, the method for processing red mud according to the above embodiment of the present invention can also have following additional technology spy Sign：
In some embodiments of the invention, in step (1), the red mud includes：The CaO of 2~3 parts by weight, 15~20 The SiO of parts by weight2, the MgO of 1~2 parts by weight, 20~25 parts by weight Al2O3, 1~3 parts by weight TiO2, 20~25 parts by weight TFe and 4~5% alkali metal oxide.
In some embodiments of the invention, in step (1), carbon-to-oxygen ratio in first mixed material for 1.4~ 1.6。
In some embodiments of the invention, in step (2), the forming processes are completed under 20~40MPa.
In some embodiments of the invention, in step (3), it is described drying process be at 105~120 DEG C carry out 4~ What 6h was completed.
In some embodiments of the invention, in step (5), the high temperature red mud slag, the dolomite and the silicon The mass ratio of stone is (55~65):(15~20):(20~25).
In some embodiments of the invention, in step (6), the jet pressure of the pure oxygen in high pressure jet stream for 1.2~ 1.6MPa, flow are 25~30m3/min。
In some embodiments of the invention, in step (6), jet stream time of the pure oxygen in high pressure jet stream for 20~ 50min。
In some embodiments of the invention, in step (6), the temperature of the melting slag liquid is 1550~1690 DEG C.
In some embodiments of the invention, in step (6), the viscosity of the melting slag liquid is 0.2~1.1Pas.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description It obtains significantly or is recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment Significantly and it is readily appreciated that, wherein：
Fig. 1 is the method flow schematic diagram of processing red mud according to an embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail.The embodiments described below is exemplary, and is only used for explaining this hair It is bright, and be not considered as limiting the invention.Particular technique or condition are not specified in embodiment, according to text in the art It offers described technology or condition or is carried out according to product description.Reagents or instruments used without specified manufacturer, For can be with conventional products that are commercially available.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.
In one aspect of the invention, the present invention proposes a kind of method for handling red mud.According to an embodiment of the invention, This method includes：(1) red mud is mixed with coal dust, to obtain the first mixed material；(2) the first mixed material is molded Processing, to obtain mixing pelletizing；(3) processing is dried in mixing pelletizing, to obtain dry pelletizing；(4) by dry ball Group carries out melt process and slag sluicing system processing successively, to obtain high temperature red mud slag and iron liquid；(5) by high temperature red mud slag It is mixed with dolomite and silica, to obtain the second mixed material；(6) using pure oxygen in high pressure jet stream to the second mixed material High temperature modifier treatment is carried out, to obtain melting slag liquid；And (7) will melt slag liquid and carry out being centrifuged into fine processing and be blown bonding Agent and dust laying oil, to obtain rock wool fibers.
The method of processing red mud according to embodiments of the present invention is described in detail below with reference to Fig. 1.According to the present invention Embodiment, this method includes：
S100：First mixed processing
In the step, red mud is mixed with coal dust, to obtain the first mixed material.Make by using metallurgical waste red mud Rock wool fibers are prepared for raw material, can further realize the minimizing processing of red mud, open up the recycling new way of red mud.
According to a particular embodiment of the invention, red mud of the present invention is material after drying, and including：2~3 The SiO of the CaO of parts by weight, 15~20 parts by weight2, the MgO of 1~2 parts by weight, 20~25 parts by weight Al2O3, 1~3 parts by weight TiO2, 20~25 parts by weight TFe and 4~5% alkali metal oxide.In some embodiments of the invention, above-mentioned alkali Metal oxide mainly includes K2O and Na2O。
According to a particular embodiment of the invention, coal dust of the present invention be it is dry after material, main component in coal dust Shared mass percent is：Fixed carbon 80~86%, and content of powder of the grain size less than 74 μm is not less than 84% in coal dust.
According to a particular embodiment of the invention, the carbon-to-oxygen ratio in the first mixed material is 1.4~1.6.By using the carbon Oxygen ratio, it is ensured that the abundant reduction of the valuable metals such as iron in red mud, on the other hand, the C that excessive carbon-to-oxygen ratio (C/O) is brought can Amount of heat, the heat quenched as high temperature are released to burn under the pure oxygen in high pressure jet action in subsequent high temperature modifier treatment Source.
S200：Forming processes
In the step, the first mixed material is subjected to forming processes, to obtain mixing pelletizing.Specifically, forming processes In can add the water of 6~9wt%, so as to be conducive to the molding of material.In some embodiments of the invention, it is molded The mixing pelletizing arrived is elliposoidal, thus, it is possible to further be conducive to the reduction of red mud.
According to a particular embodiment of the invention, forming processes can be completed under 20~40MPa, thus, it is possible to significantly carry The intensity of mixing pelletizing that height molding obtains.Preferably, forming processes can be completed under 25~35MPa, thus, it is possible into one Step improves the intensity of mixing pelletizing that molding obtains.
S300：It is dried
In the step, processing is dried in mixing pelletizing, to obtain dry pelletizing.
According to a particular embodiment of the invention, drying process can carry out 4~6h completions at 105~120 DEG C.As a result, The moisture being mixed in pelletizing can be effectively removed, improves the effect of subsequent melt processing.
S400：Melt process and slag sluicing system processing
In the step, dry pelletizing is subjected to melt process successively and slag sluicing system is handled, is melted to obtain high temperature red mud Slag and iron liquid.Specifically, dry pelletizing can be supplied to carrying out melt process, while the iron in pelletizing is aoxidized in mineral hot furnace Object is reduced to iron liquid, and obtains high temperature red mud slag.After melting, slag sluicing system can be realized with iron liquid in high temperature red mud slag, by The melting and reducing of red mud and slag sluicing system, can be concentrated on mineral hot furnace one in vivo, so as to simplify production technology by this.
S500：Second mixed processing
In the step, high temperature red mud slag is mixed with dolomite and silica, to obtain the second mixed material.
It according to a particular embodiment of the invention, can be by high temperature red mud slag, dolomite and silica according to mass ratio (55 ~65):(15~20):(20~25) are mixed, to obtain the second mixed material.The volume of red mud slag is big as a result, can Further to realize that the minimizing of red mud slag is handled, the recycling for improving red mud slag is horizontal.
According to a particular embodiment of the invention, mass percent shared by main component is in above-mentioned dolomite：CaO 45~ 55%, MgO 30~40%, and dolomite, using material after drying, average grain diameter is 2~10mm, preferably 5~8mm.As a result, The quality for the rock wool fibers being prepared can be further improved.
According to a particular embodiment of the invention, SiO in above-mentioned silica2Content not less than 90wt%, and silica is using dry Material after dry, average grain diameter are 5~15mm, preferably 8~12mm.Thus, it is possible to it is fine to further improve the rock wool being prepared The quality of dimension.
S600：High temperature modifier treatment
In the step, high temperature modifier treatment is carried out to the second mixed material using pure oxygen in high pressure jet stream, to be melted Slag liquid.According to an embodiment of the invention, the second mixed material can be placed in high temperature resistant hydrostatic column, utilizes pure oxygen in high pressure Jet stream carries out high temperature modifier treatment to the second mixed material.According to a particular embodiment of the invention, the jet stream of pure oxygen in high pressure jet stream Position is located at away from 1/4~1/3 cylinder radius range of hydrostatic column central axis, can be with as a result, by eccentric stirring, blowing Further be conducive to mass transfer, heat transfer and the homogenizing of material.On the other hand, since red mud and coal dust employ excess in dispensing stage Carbon-to-oxygen ratio, the C that excessive carbon-to-oxygen ratio is brought, can burn under pure oxygen in high pressure jet action release amount of heat, as high temperature Quenched origin of heat.
According to a particular embodiment of the invention, the jet pressure of pure oxygen in high pressure jet stream can be 1.2~1.6MPa, and flow can Think 25~30m3/min.Thus, it is possible to further be conducive to the mass transfer of material, heat transfer and homogenizing, the rock being prepared is improved The quality of cotton fiber.
According to a particular embodiment of the invention, the jet stream time of pure oxygen in high pressure jet stream is 20~50min.Thus, it is possible into One step is conducive to mass transfer, heat transfer and the homogenizing of material, improves the quality for the rock wool fibers being prepared.It is according to the present invention preferred Embodiment, the jet stream time is 30~40min, thus, it is possible to further be conducive to the mass transfer of material, heat transfer and homogenizing, improves system The standby obtained quality of rock wool fibers.
According to a particular embodiment of the invention, the temperature of melting slag liquid that high temperature modifier treatment obtains is 1550~1690 ℃.According to a preferred embodiment of the invention, the temperature for melting slag liquid is 1620~1650 DEG C.Inventor has found, improves liquid slag The temperature of liquid can make the reduction of slag liquid viscosity, and mobility improves, although being conducive to subsequently be centrifuged into fibre, energy expenditure is excessively high, It is less economical；If it is too low to melt slag liquid temperature, the increase of slag liquid viscosity, mobility will be caused to be deteriorated, cause subsequently to be centrifuged into fibre Slag liquid is difficult to be fully deployed and forms fiber in processing.Inventor is found through experiments that control melting slag liquid temperature is in above-mentioned model In enclosing, process energy consumption can be further reduced under the premise of ensureing that high-quality rock wool fibers product is prepared.
According to a particular embodiment of the invention, melt slag liquid viscosity can be 0.2~1.1Pas, preferably 0.4~ 0.8Pas, thus, it is possible to further improve the quality for the rock wool fibers being prepared.
S700：Obtain rock wool fibers product
In the step, melting slag liquid is carried out being centrifuged into fine processing and is blown binding agent and dust laying oil, to obtain rock wool Fiber.It carries out being centrifuged into fine processing specifically, four-roller centrifuge may be used, the slag liquid of melting is dropped on Centrifugal rolling, pass through Centrifugal action is into fibre, then is blown a certain amount of binding agent and dust laying oil, and rock wool fibers product is prepared, it is standby to be put into cotton collecting chamber With.
The method of processing red mud according to embodiments of the present invention as a result, by by after red mud and coal dust mixed-forming, inciting somebody to action To mixing pelletizing processing is dried, obtain dry pelletizing, and then while will dry pelletizing and carry out melt process, realize Slag sluicing system respectively obtains high temperature red mud slag and iron liquid；Subsequently high temperature red mud slag is mixed to get with dolomite and silica Second mixed material, and high temperature modifier treatment is carried out to the second mixed material using pure oxygen in high pressure jet stream, obtain melting slag liquid；Again It carries out being centrifuged into fine processing by the way that slag liquid will be melted, liquid slag liquid is made to be dropped on Centrifugal rolling, through centrifugal action into fibre, and is blown After binding agent and dust laying oil, rock wool fibers product is prepared.This method can effectively utilize metallurgical waste red mud system as a result, The rock wool fibers of standby high-quality open the new way of red mud resource utilization, have significant economic benefit and environmental benefit.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe Property, without limiting the invention in any way.
Embodiment 1
According to the following steps, rock wool fibers are prepared using red mud：
(1) red mud is mixed with coal dust, to obtain the first mixed material, wherein C/O is 1.6；
Main component mass percent is in red mud：CaO 2%, SiO220%, MgO 1%, Al2O325%, (K2O+ Na2O) 4%, TiO23%, TFe 25%；Red mud is using material after drying；
Main component percentage is in coal dust：Fixed carbon 80%；Coal dust is using material after drying, and wherein grain size is 74 Content of powder below μm is not less than 84%.
(2) the first mixed material is subjected to forming processes, to obtain mixing pelletizing；Wherein, briquetting pressure 20MPa, Moisture addition mass percent is 9%, and gained mixing pelletizing is elliposoidal.
(3) processing is dried in mixing pelletizing, to obtain dry pelletizing；105 DEG C of drying temperature, drying time 6h.
(4) dry pelletizing is subjected to melt process successively and slag sluicing system is handled, to obtain high temperature red mud slag and iron Liquid；
(5) by high temperature red mud slag and dolomite and silica according to mass ratio 55:20:25 are mixed, to obtain Two mixed materials；
Mass percent is shared by main component in dolomite：CaO 45%, MgO 40%；Dolomite is using object after drying Material, average grain diameter 2mm；
Mass percent is shared by main component in silica：SiO2Not less than 90%；Silica is average using material after drying Grain size is 5mm；
(6) high temperature modifier treatment：Second mixed material is placed in high temperature resistant hydrostatic column, utilizes pure oxygen in high pressure jet stream Carry out injection stirring.Wherein, jet pressure 1.2MPa, pure oxygen flow are 25m3/ min, jet stream time are 50min.Jet stream position At away from 1/4 cylinder radius of hydrostatic column central axes.The melting slag liquid temperature obtained after high temperature is quenched is 1550 DEG C, Viscosity is 1.1Pas.
(7) liquid slag liquid is dropped on the Centrifugal rolling of four-roller centrifuge, through centrifugal action into fibre, and be blown a certain amount of To obtain rock wool fibers, it is spare to be put into cotton collecting chamber for binding agent and dust laying oil.
The rock wool fibers production cotton rate being prepared using above step is high, and shot content 5.2%, fibre diameter is 4.8 μ M meets requirement of the national standard to rock wool fibers shot content, fibre diameter.
Embodiment 2
According to the following steps, rock wool fibers are prepared using red mud：
(1) red mud is mixed with coal dust, to obtain the first mixed material, wherein C/O is 1.4；
Main component mass percent is in red mud：CaO 3%, SiO215%, MgO 2%, Al2O320%, (K2O+ Na2O) 5%, TiO21%, TFe 25%；Red mud is using material after drying；
Main component percentage is in coal dust：Fixed carbon 86%；Coal dust is using material after drying, and wherein grain size is 74 Content of powder below μm is not less than 84%.
(2) the first mixed material is subjected to forming processes, to obtain mixing pelletizing；Wherein, briquetting pressure 40MPa, Moisture addition mass percent is 6%, and gained mixing pelletizing is elliposoidal.
(3) processing is dried in mixing pelletizing, to obtain dry pelletizing；120 DEG C of drying temperature, drying time 4h.
(4) dry pelletizing is subjected to melt process successively and slag sluicing system is handled, to obtain high temperature red mud slag and iron Liquid；
(5) by high temperature red mud slag and dolomite and silica according to mass ratio 65:15:20 are mixed, to obtain Two mixed materials；
Mass percent is shared by main component in dolomite：CaO 55%, MgO 30%；Dolomite is using object after drying Material, average grain diameter 10mm；
Mass percent is shared by main component in silica：SiO2Not less than 90%；Silica is average using material after drying Grain size is 15mm；
(6) high temperature modifier treatment：Second mixed material is placed in high temperature resistant hydrostatic column, utilizes pure oxygen in high pressure jet stream Carry out injection stirring.Wherein, jet pressure 1.6MPa, pure oxygen flow are 30m3/ min, jet stream time are 20min.Jet stream position At away from 1/3 cylinder radius of hydrostatic column central axes.The melting slag liquid temperature obtained after high temperature is quenched is 1690 DEG C, Viscosity is 0.2Pas.
(7) liquid slag liquid is dropped on the Centrifugal rolling of four-roller centrifuge, through centrifugal action into fibre, and be blown a certain amount of To obtain rock wool fibers, it is spare to be put into cotton collecting chamber for binding agent and dust laying oil.
The rock wool fibers production cotton rate being prepared using above step is high, and shot content 5.5%, fibre diameter is 4.2 μ M meets requirement of the national standard to rock wool fibers shot content, fibre diameter.
Embodiment 3
According to the following steps, rock wool fibers are prepared using red mud：
(1) red mud is mixed with coal dust, to obtain the first mixed material, wherein C/O is 1.5；
Main component mass percent is in red mud：CaO 2.5%, SiO218%, MgO 1.5%, Al2O323%, (K2O+Na2O) 4.5%, TiO22%, TFe 23%；Red mud is using material after drying；
Main component percentage is in coal dust：Fixed carbon 83%；Coal dust is using material after drying, and wherein grain size is 74 Content of powder below μm is not less than 84%.
(2) the first mixed material is subjected to forming processes, to obtain mixing pelletizing；Wherein, briquetting pressure 30MPa, Moisture addition mass percent is 6%, and gained mixing pelletizing is elliposoidal.
(3) processing is dried in mixing pelletizing, to obtain dry pelletizing；115 DEG C of drying temperature, drying time 5h.
(4) dry pelletizing is subjected to melt process successively and slag sluicing system is handled, to obtain high temperature red mud slag and iron Liquid；
(5) by high temperature red mud slag and dolomite and silica according to mass ratio 60:18:22 are mixed, to obtain Two mixed materials；
Mass percent is shared by main component in dolomite：CaO 50%, MgO 35%；Dolomite is using object after drying Material, average grain diameter 6mm；
Mass percent is shared by main component in silica：SiO2Not less than 90%；Silica is average using material after drying Grain size is 10mm；
(6) high temperature modifier treatment：Second mixed material is placed in high temperature resistant hydrostatic column, utilizes pure oxygen in high pressure jet stream Carry out injection stirring.Wherein, jet pressure 1.4MPa, pure oxygen flow are 28m3/ min, jet stream time are 35min.Jet stream position At away from 3/10 cylinder radius of hydrostatic column central axes.The melting slag liquid temperature obtained after high temperature is quenched is 1630 DEG C, viscosity 0.6Pas.
(7) liquid slag liquid is dropped on the Centrifugal rolling of four-roller centrifuge, through centrifugal action into fibre, and be blown a certain amount of To obtain rock wool fibers, it is spare to be put into cotton collecting chamber for binding agent and dust laying oil.
The rock wool fibers production cotton rate being prepared using above step is high, and shot content 3.9%, fibre diameter is 4.6 μ M meets requirement of the national standard to rock wool fibers shot content, fibre diameter.
Comparative example 1
According to the following steps, rock wool fibers are prepared using red mud：
(1) red mud is mixed with coal dust, to obtain the first mixed material, wherein C/O is 1.6；
Main component mass percent is in red mud：CaO 2%, SiO220%, MgO 1%, Al2O325%, (K2O+ Na2O) 4%, TiO23%, TFe 25%；Red mud is using material after drying；
Main component percentage is in coal dust：Fixed carbon 80%；Coal dust is using material after drying, and wherein grain size is 74 Content of powder below μm is not less than 84%.
(2) the first mixed material is subjected to forming processes, to obtain mixing pelletizing；Wherein, briquetting pressure 20MPa, Moisture addition mass percent is 9%, and gained mixing pelletizing is elliposoidal.
(3) processing is dried in mixing pelletizing, to obtain dry pelletizing；105 DEG C of drying temperature, drying time 6h.
(4) dry pelletizing is subjected to melt process successively and slag sluicing system is handled, to obtain high temperature red mud slag and iron Liquid；
(5) by high temperature red mud slag and dolomite and silica according to mass ratio 55:20:25 are mixed, to obtain Two mixed materials；
Mass percent is shared by main component in dolomite：CaO 45%, MgO 40%；Dolomite is using object after drying Material, average grain diameter 2mm；
Mass percent is shared by main component in silica：SiO2Not less than 90%；Silica is average using material after drying Grain size is 5mm；
(6) high temperature modifier treatment：Second mixed material is placed in high temperature resistant hydrostatic column, utilizes pure oxygen in high pressure jet stream Carry out injection stirring.Wherein, jet pressure 1.2MPa, pure oxygen flow are 25m3/ min, jet stream time are 15min.Jet stream position At away from 1/4 cylinder radius of hydrostatic column central axes.The melting slag liquid temperature obtained after high temperature is quenched is 1410 DEG C, Viscosity is 2.3Pas.
(7) liquid slag liquid is dropped on the Centrifugal rolling of four-roller centrifuge, through centrifugal action into fibre, and be blown a certain amount of To obtain rock wool fibers, it is spare to be put into cotton collecting chamber for binding agent and dust laying oil.
The rock wool fibers production cotton rate being prepared using above step is low, shot content 11.8%, fibre diameter 8.5 μm, it is unsatisfactory for requirement of the national standard to rock wool fibers shot content, fibre diameter.
Comparative example 2
According to the following steps, rock wool fibers are prepared using red mud：
(1) red mud is mixed with coal dust, to obtain the first mixed material, wherein C/O is 1.6；
Main component mass percent is in red mud：CaO 2%, SiO220%, MgO 1%, Al2O325%, (K2O+ Na2O) 4%, TiO23%, TFe 25%；Red mud is using material after drying；
Main component percentage is in coal dust：Fixed carbon 80%；Coal dust is using material after drying, and wherein grain size is 74 Content of powder below μm is not less than 84%.
(2) the first mixed material is subjected to forming processes, to obtain mixing pelletizing；Wherein, briquetting pressure 20MPa, Moisture addition mass percent is 9%, and gained mixing pelletizing is elliposoidal.
(3) processing is dried in mixing pelletizing, to obtain dry pelletizing；105 DEG C of drying temperature, drying time 6h.
(4) dry pelletizing is subjected to melt process successively and slag sluicing system is handled, to obtain high temperature red mud slag and iron Liquid；
(5) by high temperature red mud slag and dolomite and silica according to mass ratio 55:20:25 are mixed, to obtain Two mixed materials；
Mass percent is shared by main component in dolomite：CaO 45%, MgO 40%；Dolomite is using object after drying Material, average grain diameter 2mm；
Mass percent is shared by main component in silica：SiO2Not less than 90%；Silica is average using material after drying Grain size is 5mm；
(6) high temperature modifier treatment：Second mixed material is placed in high temperature resistant hydrostatic column, utilizes pure oxygen in high pressure jet stream Carry out injection stirring.Wherein, jet pressure 1.2MPa, pure oxygen flow are 25m3/ min, jet stream time are 90min.Jet stream position At away from 1/4 cylinder radius of hydrostatic column central axes.The melting slag liquid temperature obtained after high temperature is quenched is 1720 DEG C, Viscosity is 0.2Pas.
(7) liquid slag liquid is dropped on the Centrifugal rolling of four-roller centrifuge, through centrifugal action into fibre, and be blown a certain amount of To obtain rock wool fibers, it is spare to be put into cotton collecting chamber for binding agent and dust laying oil.
The rock wool fibers production cotton rate being prepared using above step is low, shot content 10.6%, fibre diameter 7.9 μm, it is unsatisfactory for requirement of the national standard to rock wool fibers shot content, fibre diameter.
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments " The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It is combined in an appropriate manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field Art personnel can tie the different embodiments or examples described in this specification and the feature of different embodiments or examples It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changes, replacing and modification.

Claims (10)

  1. A kind of 1. method for handling red mud, which is characterized in that including：
    (1) red mud is mixed with coal dust, to obtain the first mixed material；
    (2) first mixed material is subjected to forming processes, to obtain mixing pelletizing；
    (3) processing is dried in the mixing pelletizing, to obtain dry pelletizing；
    (4) the dry pelletizing is subjected to melt process successively and slag sluicing system is handled, to obtain high temperature red mud slag and iron Liquid；
    (5) the high temperature red mud slag is mixed with dolomite and silica, to obtain the second mixed material；
    (6) high temperature modifier treatment is carried out to second mixed material using pure oxygen in high pressure jet stream, to obtain melting slag liquid；
    (7) the melting slag liquid is carried out being centrifuged into fine processing and is blown binding agent and dust laying oil, to obtain rock wool fibers.
  2. 2. according to the method described in claim 1, it is characterized in that, in step (1), the red mud includes：2~3 parts by weight The SiO of CaO, 15~20 parts by weight2, the MgO of 1~2 parts by weight, 20~25 parts by weight Al2O3, 1~3 parts by weight TiO2、20 The TFe of~25 parts by weight and 4~5% alkali metal oxide.
  3. 3. according to the method described in claim 1, it is characterized in that, in step (1), the carbon-to-oxygen ratio in first mixed material It is 1.4~1.6.
  4. 4. according to the method described in claim 1, it is characterized in that, in step (2), the forming processes are in 20~40MPa Lower completion.
  5. 5. according to the method described in claim 1, it is characterized in that, in step (3), the drying process is at 105~120 DEG C It is lower to carry out what 4~6h was completed.
  6. 6. according to the method described in claim 1, it is characterized in that, in step (5), the high temperature red mud slag, the white clouds The mass ratio of stone and the silica is (55~65):(15~20):(20~25).
  7. 7. according to the method described in claim 1, it is characterized in that, in step (6), the jet pressure of the pure oxygen in high pressure jet stream For 1.2~1.6MPa, flow is 25~30m3/min。
  8. 8. according to the method described in claim 1, it is characterized in that, in step (6), the jet stream time of the pure oxygen in high pressure jet stream For 20~50min.
  9. 9. according to the method described in claim 1, it is characterized in that, in step (6), the temperature of the melting slag liquid for 1550~ 1690℃。
  10. 10. according to the method described in claim 1, it is characterized in that, in step (6), the viscosity of the melting slag liquid for 0.2~ 1.1Pa·s。
CN201711248906.5A 2017-12-01 2017-12-01 The method for handling red mud Pending CN108149009A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114804611A (en) * 2022-05-27 2022-07-29 王进 Method for producing fireproof black cotton by utilizing red mud
CN114873923A (en) * 2022-03-28 2022-08-09 中铝山东有限公司 Red mud-based heat insulation material and preparation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114873923A (en) * 2022-03-28 2022-08-09 中铝山东有限公司 Red mud-based heat insulation material and preparation method thereof
CN114873923B (en) * 2022-03-28 2023-08-22 中铝山东有限公司 Red mud-based heat insulation material and preparation method thereof
CN114804611A (en) * 2022-05-27 2022-07-29 王进 Method for producing fireproof black cotton by utilizing red mud
CN114804611B (en) * 2022-05-27 2023-12-12 王进 Method for producing fireproof black cotton by using red mud

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