CN209161850U - Red mud magnetizing roast utilization system - Google Patents
Red mud magnetizing roast utilization system Download PDFInfo
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- CN209161850U CN209161850U CN201821737118.2U CN201821737118U CN209161850U CN 209161850 U CN209161850 U CN 209161850U CN 201821737118 U CN201821737118 U CN 201821737118U CN 209161850 U CN209161850 U CN 209161850U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The utility model discloses a kind of red mud magnetizing roast utilization systems, it is related to mineral resources and utilizes technical field, its key points of the technical solution are that including blender, dryer, rotary kiln, magnetic separator, filter press, the discharge port of blender is connected by the feed inlet of the second conveying equipment and dryer；Ball mill is equipped between dryer and rotary kiln, the discharge port of dryer is connected by the feed inlet of third conveying equipment and ball mill, and the discharge port of ball mill and the feed inlet of rotary kiln connect；The discharge port of rotary kiln is connected by the feed inlet of the 4th conveying equipment and magnetic separator；Magnetic separator is equipped with magnetic outlet and non magnetic outlet, and non magnetic outlet is connected by the feed inlet of the 5th conveying equipment and filter press.The utility model solves the problems, such as that conventional magnetized roasting, because ash content height causes reaction efficiency low, improves red mud comprehensive utilization ratio by Optimal improvements magnetizing roast equipment using lignite reduction red mud.
Description
Technical field
The utility model relates to mineral resources to utilize technical field, more specifically, it is related to a kind of red mud magnetizing roast
Utilization system.
Background technique
Red mud is waste residue of the coloured aluminium industry after extracting aluminium oxide in bauxite, because containing iron oxide, surface is in red
Color pureed is strong basicity, general every production 1 ton of aluminium oxide output, 1.5 tons of red muds.The chemical composition of red mud is complex, mainly
Including Al2O3、SiO2、Fe2O3、CaO、TiO2、Na2O additionally contains a small amount of rare metal.Red mud storage is numerous at present, generally
Based on stockpiling, CaO, Na after raining2O reacts to form strong basicity waste liquid with rainwater, the direct polluted surface of highly basic waste liquid and underground
Water source directly endangers human health.It thus reduces or more except the generation and harm of red mud, realizes by all kinds of means, greatly to greatest extent
The resource utilization of quantity is extremely urgent.
Application publication number is that the Chinese invention patent application of CN108118141A discloses a kind of chemical industry metallurgical integrated treatment
Using the method for red mud, the lignite for having solid phase reduction and vapour phase reduction concurrently with cheap makees Fe2O3Reducing agent, the dispersion of lime masonry
Agent and Al2O3Conversion combination agent, guarantee reducing atmosphere reduction converting apparatus in carry out red mud in iron and constructed of aluminium conversion
Roasting, so that Fe2O3 is reduced to magnetize optional Fe3O4And Fe；Al2O3For can the molten leaching of boiling Al2(CO3)3Roast conversion product
Iron extract mine producation is made through a magnetic separation in material, and reduced iron powder product is made in after baking magnetic separation；Rich aluminium tailings, boiling leaching aluminium are simultaneously
Oxidizing, flocculating desiliconization leaches aluminum solutions with ammonium hydroxide and synthesizes aluminum carbonate basic ammonium (precipitating), and aluminum carbonate basic ammonium is dry, calcination is made
Nano active alumina product, mother liquor concentrations, which crystallize, is made byproduct aluminium carbonate ammonium.The patent application can be produced compared with Gao Pin
The smart iron ore of taste, but when having the disadvantage that lignite as reducing agent, due to, there are too many ash content, causing to restore in lignite
In various reactions be difficult to control so that the efficiency for producing smart iron ore is lower.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of comprehensive benefits of red mud magnetizing roast
With system, by the magnetizing roast system of new-type gas-based reduction, high-efficiency sieve selects smart iron ore, and improves the comprehensive utilization of red mud
Rate.
To achieve the above object, the utility model provides following technical solution: a kind of red mud magnetizing roast comprehensive utilization
System, including blender, dryer, rotary kiln, magnetic separator, the filter press set gradually by process, the feed inlet of blender is logical
It crosses the first conveying equipment and connects external red mud source, the discharge port of blender is connected by the feed inlet of the second conveying equipment and dryer
It connects；Ball mill is equipped between dryer and rotary kiln, the discharge port of dryer passes through the charging of third conveying equipment and ball mill
Mouth connection, the discharge port of ball mill and the feed inlet of rotary kiln connect；Coke oven gas pipe is provided on rotary kiln, rotary kiln
Discharge port is connected by the feed inlet of the 4th conveying equipment and magnetic separator；Magnetic separator is equipped with magnetic outlet and non magnetic outlet,
Non magnetic outlet is connected by the feed inlet of the 5th conveying equipment and filter press.
By using above-mentioned technical proposal, red mud is transported in blender by the first conveying equipment, while to blender
In be proportionally added into additive and be sufficiently stirred, to prevent sial and iron high temperature bond.Mixture is turned by the second conveying equipment
It moves on to dryer to be dried, the mixture after drying is by ball mill grinding at fine particulate.By the mixing of fine particle state
Material is sent to rotary kiln by third conveying equipment, and coke oven gas pipe is passed through coke-stove gas into rotary kiln, and mixture is in high temperature
Reduction reaction occurs for lower and coke-stove gas, and since ash content being not present in the also agent of gas base, red mud reduction efficiency and effect are greatly improved,
Production efficiency and product quality improve.Original then drains into cooling in pond, and part red mud is converted to magnetic iron and Fe3O4.Reduction
Material afterwards is transported to magnetic separator by the 4th conveying equipment and is sieved, magnetic iron and Fe3O4It is remaining from magnetism outlet discharge
Non magnetic tailings be discharged by non magnetic outlet, non magnetic tailings is transplanted on filter press and is pressed by the 5th conveying equipment
Filter, as other purposes.Magnetic iron and Fe3O4Iron is enriched with, Iron grade is greatly improved, so that the iron in red mud is recycled
It utilizes.Non magnetic tailings can be used as construction material material, reduce solid waste discharge, be conducive to the comprehensive benefit of red mud
With.
The utility model is further arranged to: the discharge port of the filter press is connected with mixing by the 6th conveying equipment
Machine.
By using above-mentioned technical proposal, non magnetic tailings is transported in batch mixer by the 6th conveying equipment, while to
The mixing of the raw materials such as lime stone, sandstone is added in batch mixer, cement slurry is worn into, through rotary kiln calcination of cement clinker, then through mixing
Mixing material is milled into cement.
The utility model is further arranged to: the discharge port of the batch mixer is connected with molding by the 7th conveying equipment
Machine.
By using above-mentioned technical proposal, non magnetic tailings is transported in batch mixer by the 6th conveying equipment, while to
In batch mixer according to non magnetic tailings weight according to the proportion every 1kg be added quick lime 0.15-0.25kg, Cab-O-sil 0.5-0.6kg,
Flyash 0.15-0.3kg, then is mixed evenly to form mixture；By mixture using shaping mechanism at diameter 8-10cm
Mud ball, be then put into furnace cupola and melted at a temperature of 1450-1500 DEG C, obtain fusant；By fusant use from
Scheming is added binder and produces cotton-shaped mineral wool at fibre, and asbestos product is made using post-processing, improves the comprehensive benefit of red mud
With value.
The utility model is further arranged to: being successively arranged first from feed inlet to discharge port direction inside the magnetic separator
Field regions and the second field regions, the first field regions intensity are 800-1000HS, and the second field regions intensity is 1400-2500HS.
By using above-mentioned technical proposal, contain magnetic iron and Fe in the red mud after reduction3O4, by the first magnetic
Most magnetisable material is screened separation when place, and then least a portion of magnetisable material is under the strong magnetic action of the second field regions
It is further screened separation, sizing screening effectively improves the extraction of magnetisable material.
The utility model is further arranged to: heat exchanger is equipped between the rotary kiln and dryer.
By using above-mentioned technical proposal, the fume afterheat of rotary kiln can be transmitted to inside dryer by heat exchanger,
Make full use of heat that the mixture in dryer is dried, it is energy saving.
The utility model is further arranged to: additive funnel is equipped at the feed inlet of the blender.
By using above-mentioned technical proposal, preparatory prepared additive is placed in additive funnel, additive is in weight
Power acts on lower uniform flow and falls into blender, so that red mud and additive are sufficiently mixed under the action of blender, with suppression
The high temperature bond of sial processed etc. and iron.
The utility model is further arranged to: the utilization system further includes reaction kettle, filters bed and expansion drying
Machine.
By using above-mentioned technical proposal, by non magnetic tailing and with the oxidant mistake of the siliceous meter excess 1.3-1.5% of slag
Mixing, is then put into heatable reaction kettle, carries out slightly boiled boiling 1-2h by sodium sulphate mixing, dissolves out aluminium in aluminium carbonate.
After the reaction was completed, standing 20min can discharge.It is separated by solid-liquid separation on filtering bed, washing is drained, centrifuge dehydration.Solid-state
Aluminum carbonate basic ammonium is transplanted in flash dryer, 200 ± 10 DEG C at a temperature of it is dry to moisture 2-3%, available carbonic acid
Aluminium ammonium.
The utility model is further arranged to: the utilization system further includes calcination furnace.
By using above-mentioned technical proposal, after aluminium carbonate ammonium decomposes at high temperature, product Al2O3In high fineness, high-ratio surface
Long-pending nano active aluminium oxide, improves the comprehensive utilization value of red mud.
The utility model is further arranged to: the utilization system further includes stainless steel triple effect evaporator and vibration stream
Change bed dryer.
By using above-mentioned technical proposal, filtrate is transferred to carry out condensing crystallizing, crystal in stainless steel triple effect evaporator
It is dried for 100 ± 10 DEG C on Vibratingfluidbeddrier, byproduct ammonium carbonate is made, improves the comprehensive utilization valence of red mud
Value.
In conclusion the utility model has the advantages that compared with the prior art
1. inhibiting the additive of sial and iron high temperature bond due to being proportionally added into, so that when roasting reduction in red mud
Sial will not be combined with iron, will not be bonded between particle, since the red mud porosity after drying stirring is high, and fine size, because
This reaction is rapider, and calcining time shortens to or so half an hour.Compared to the time that tradition roasting needs to spend nearly 3 hours, instead
The time answered shortens, and roasting reduction efficiency greatly improves.Magnetic separation separation can effectively carry out iron-containing mineral and other substances
Separation, the TFe content of isolated Iron Ore Powder improve Iron grade up to 60%-63%；
2. the non magnetic tailings after magnetizing roast can be used as construction material；The raw material extracted as aluminium titanium and rare element；
Dry-mixed mortar production line is sent into as dry mortar medium-fine sand；Raw materials for production as rock wool；PVC fillers are used as after fine grinding sorting,
It is widely used, improve the comprehensive utilization ratio of red mud；
3. the non magnetic tailings after magnetizing roast passes through the available nano active aluminium oxide of specially treated and ammonium carbonate,
Improve the comprehensive utilization value of red mud；
4. the non magnetic tailings after magnetizing roast is maximized by materials such as the available gallium of specially treated, vanadium, titanium, zirconiums
Utilize red mud.
Detailed description of the invention
Fig. 1 is the schematic diagram of system structure in embodiment one；
Fig. 2 is the process flow chart of embodiment one；
Fig. 3 is the process flow chart of embodiment two.
Appended drawing reference: 1, blender；11, the first conveying equipment；12, the second conveying equipment；13, third conveying equipment；14,
4th conveying equipment；15, the 5th conveying equipment；16, the 6th conveying equipment；17, the 7th conveying equipment；18, the 8th conveying equipment；
2, dryer；3, rotary kiln；31, coke oven gas pipe；4, magnetic separator；5, filter press；6, batch mixer；7, molding machine.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
Wherein identical components are presented with like reference characters.It should be noted that word used in the following description
Language "front", "rear", "left", "right", "up" and "down" refer to the direction in attached drawing, word " bottom surface " and " top surface ", "inner" and
"outside" refers respectively to the direction towards or away from geometric center of specific component.
Embodiment one: a kind of red mud magnetizing roast utilization system, as depicted in figs. 1 and 2, including blender 1, drying
Machine 2, rotary kiln 3, magnetic separator 4, filter press 5 are equipped with coke oven gas pipe 31 on rotary kiln 3.
Blender 1 is equipped with inlet port and outlet port, and the feed inlet of blender 1 is connected with the first conveying equipment 11, and first
The other end of conveying equipment 11 connects red mud stockpiling area.Blender 1 can be controlled using the DCS of nine smelting three-dimensional chemical industry machinery productions
High-viscosity material blender is suitble to stirring to have the red mud of viscosity, so that mixing is abundant.First conveying equipment 11 can be belt
Conveyer, red mud transport in blender 1 by the first conveying equipment 11.Additive is equipped at the feed inlet of blender 1 to leak
Bucket, is placed with preparatory prepared additive in additive funnel, and additive uniform flow and falls into stirring under the effect of gravity
In machine 1, so that red mud and additive are sufficiently mixed under the action of blender 1.
Before red mud is transported to blender 1, analysis is sampled to red mud, analyzes ingredient therein and content, as a result such as
Under:
| Ingredient | Al2O3 | SiO2 | Fe2O3 | TiO2 | CaO | Na2O | Igloss amount |
| Content, % | 11.59 | 2.82 | 69.53 | 5.48 | 0.25 | 1.2 | 9.13 |
Then according to the flow of red mud constituent adjustment additive, so that additive is proportionally added with red mud, to inhibit
The high temperature bond of sial etc. and iron.Additive can be pulverulent lime stone (CaCO3), the weight ratio of lime stone and red mud is
The granularity of 0.1:1, lime stone are controlled in 400-1000 mesh, and above 95% or more the accounting of 700 mesh.
It is discharged after additive and red mud mixing from the discharge port of blender, dryer 2 is equipped with dry entrance and does
Dry outlet is connected with the second conveying equipment 12 between dry entrance and the discharge port of blender, and mixture is through the second conveying equipment
12 transport dryer 2, heat exchanger are equipped in dryer 2, heat exchanger can be the industrial fume afterheat of Shen Chen and return
Device is received, heat exchanger is connected with rotary kiln 3 and carries out heat exchange, and fume afterheat in rotary kiln 3 is made full use of to carry out mixture
It is dry, save the energy.
From dry outlet discharge after mixture is dry, transported in rotary kiln 3 by third conveying equipment 13, from coke-oven coal
Feed channel 31 is passed through coke-stove gas into rotary kiln 3, and the ingredient and content of coke-stove gas are as follows:
| Ingredient | CO2 | O2 | CO | H2 | CH4 | CnHm | N2 |
| Content | 3.33 | 0.80 | 8.07 | 55.23 | 23.27 | 2.20 | 7.10 |
Temperature in rotary kiln 3 is 750-1150 DEG C.Red mud roasting reduction, reaction process in rotary kiln 3 is as follows:
3Fe2O3+CO=2Fe3O4+CO2↑
3Fe2O3+H2 =2Fe3O4+H2O
Fe3O4+4H2 =3Fe+4H2O
CaCO3=CaO+CO2↑
Al2O3+CaO=Ca(AlO2)2
SiO2+CaO=CaSiO3
Red mud porosity after being stirred due to drying is high, and fine size, will not be bonded between particle, therefore react more fast
Speed.Compared to the time that tradition roasting needs to spend nearly 3 hours, the time of reaction can shorten to 15-60min, roasting reduction effect
Rate greatly improves, in order to enable calcination is more abundant, the 40min of selection roasting herein.
Red mud after roasting, which is directly drained into cooling pond from the kiln tail of rotary kiln 3, to be cooled down, at this time iron content red mud
It has changed into grey black and there is good magnetism.
It roasts solid material after cooling and transports ball mill by the 4th conveying equipment 14, the 4th conveying equipment 14 can be with
It is mortar pump, solid material is milled down to 80-150 mesh in spheroidal graphite machine, and levigate material is then put into magnetic separator 4, magnetic separation
Machine 4 can be vertical ring magnetic separator, and magnetic separator 4 has two-stage screening area, and first order screening area magnetic field is 80-1200HS, select herein
1000HS is selected, second level screening area magnetic field is 1400-2500HS, selects 2000HS herein.Magnetic separator 4 be equipped with magnetic outlet and
Non magnetic outlet, the Iron Ore Powder of solid material is sorted out and from magnetism outlet discharge by magnetic separator 4, by the Iron Ore Powder of screening
TFe content up to 60%-63%.
In order to further increase the rate of recovery of iron, as needed, the substance that magnetic separator 4 screens can be put into revolution again
Secondary reduction roasting is carried out in furnace 3, then carries out secondary magnetic separation.
Nonmagnetic portion after magnetic separation separation is shipped to filter press by the 5th conveying equipment 15 from magnetic outlet discharge is taken
Filters pressing is carried out in 5, the 5th conveying equipment 15 can be belt conveyor, and filter press 5 can be 630 using positive group filtering production
Type diaphragm filter press.Nonmagnetic portion solid is separated.Then solid is transported to mixing by the 6th conveying equipment 16
Machine 6, the 6th conveying equipment 16 can be screw conveyor, and batch mixer 6 can be 1000 type machine,massing of persistent strength or power board.
Quick lime, the 0.5-0.6kg of 0.15-0.25kg is added in every 1kg non-magnetic solids according to the proportion in batch mixer 6
Cab-O-sil, 0.15-0.3kg flyash be stirred mixing.The mixture formed is stirred to transport by the 7th conveying equipment 17
Defeated to arrive molding machine 7, the 7th conveying equipment 17 can be screw conveyor, and molding machine 7 can be nodulizer.Mixture is made directly
Diameter is the mud ball of 8-10cm.Then it is put into furnace cupola and is melted at a temperature of 1450-1500 DEG C, fusant is used into centrifugation
Machine is added binder and produces cotton-shaped mineral wool at fibre, and asbestos product is made using post-processing.
As needed, flyash 0.8- can also be added in every 1kg non-magnetic solids according to the proportion in batch mixer 6
0.9kg, sandstone 0.7-0.8kg, gypsum 0.1-0.2kg, lime 0.2-0.3kg and water 2.0-2.5kg are mixed.Stirring
The mixture of formation transports molding machine 7 by the 7th conveying equipment 17, and the 7th conveying equipment 17 can be screw conveyor, at
Type machine 7 can be the QTJ6-15 type non-baking brick machine that makes innovations.Mixture is fabricated to hollow brick blank, hollow brick under the action of molding machine 7
Base is moved in steam pressure furnace by the 8th conveying equipment 18, first precuring 12 hours under temperature 50 C, 70% humidity, then in temperature
180 DEG C, conserve 8 hours under the conditions of air pressure 1.2MPa, obtain non-burning brick, used as construction material, improve comprehensive utilization ratio.
The technological principle of the red mud magnetizing roast utilization system is as follows:
(1) it tests and analyzes simultaneously ingredient: red mud sampling is tested and analyzed, obtain each component in red mud and constitute and contain
Amount, according to SiO in red mud2And Al2O3Additive is added in total weight 1:1；
(2) stirring and drying: being stirred 30-60min for proportioned red mud, so that material is uniformly mixed, then does
Dry, drying temperature is 180-200 DEG C；
(3) roasting reduction: the material after drying being put into rotary kiln 3 and carries out roasting reduction, and reduction temperature control exists
750-1150 DEG C, recovery time 40min；Coke-stove gas intake is related with red mud amount in rotary furnace, about 60m3/T；
(4) magnetic separation separates: with ball mill grinding to 80-150 mesh after the product after roasting reduction is cooled down, then successively
It is sieved by the magnetic separator 4 of 800HS and 1400HS, isolates the magnetic Iron Ore Powder of tool；
(5) tailings is handled: the namagnetic substance after magnetic separation is separated carries out filters pressing and drying, and building is made as needed
Material.
As needed, the namagnetic substance after magnetic separation separation is also used as following purposes:
(a) raw material extracted as aluminium titanium and rare element；
(b) dry-mixed mortar production line is sent into as dry mortar medium-fine sand；
(c) as the raw materials for production of rock wool；
(d) PVC fillers are used as after fine grinding sorting.
Embodiment two: a kind of red mud magnetizing roast comprehensive utilization process, as shown in figure 3, the difference with embodiment one
It is: boiling filters pressing processing is carried out to the non magnetic tailing after magnetic separation separation.
It is mixed by non magnetic tailing and with the oxidant sodium peroxydisulfate of the siliceous meter excess 1.3-1.5% of slag, sodium peroxydisulfate
It acts on as follows: first is that its oxidation, which makes silicon not, becomes the easily SiO of gel at a low price3 2-, and become the SiO that high price is not easy gel4 2-,
Two there is provided Na+, silicon is made to become the macromolecular Na for being not easy gel2SiO4, convenient for being separated by filtration.Then mixing being put into can add
Sodium hydroxide solution is added in the reaction kettle of heat, in reaction kettle and carries out slightly boiled boiling 1-2h, makes aluminium in Na2AlO2Dissolution, makes silicon oxygen
Chemical conversion is non-gelatinous Na2SiO4It (avoids becoming gelatinous Na2SiO3), 30min is added three times macromolecular flocculating agent before discharging
Modified polyacrylamide.The time is added are as follows: every 5min plus once.Total amount is the 0.002-0.005Wt% of silicon content.Reactant
Material is separated by solid-liquid separation by filter press, obtains immersion liquid and slag.
Excessive CO is passed through into ammonium hydroxide2And crystallize, solid-state ammonium hydrogen carbonate is obtained, then by solid-state ammonium hydrogen carbonate and hydrogen-oxygen
Change aluminium, which is placed at 30-90 DEG C, to react, and following reaction occurs:
2Na2AlO2+3H2O+CO2=2Al(OH)3↓+ Na2CO3
CO2+NH3+H2O=NH4HCO3
Al(OH)3+ NH4HCO3 →NH4Al(OH)2CO3↓+H2O
Ammonium hydroxide is added according to excessive 20% quantity of requirement, is constantly stirred during the addition process, since the reaction is
The endothermic reaction, therefore constantly heated during ammonium hydroxide is added, so that temperature is maintained at 30-50 DEG C.In order to avoid early period is anti-
Answer it is too fast cause heat absorption excessive, ammonium hydroxide is added portionwise, and preceding 10min is added 20%, 60% is then added in 30min, then use 10min
Residue 20% is added.
After the reaction was completed, standing 20min can discharge.It is separated by solid-liquid separation on filtering bed, washing is drained, and centrifuge is de-
Water.Solid-state aluminum carbonate basic ammonium is transplanted in flash dryer, 200 ± 10 DEG C at a temperature of it is dry to moisture 2-3%, then
It send into calcination furnace in 1200 ± 10 DEG C of progress calcinations, NH4Al(OH)2CO3It is decomposed into N2、H2With CO2Evolution, product Al2O3It is in
High fineness, the nano active aluminium oxide output of high-specific surface area.
Filtrate is transferred to condensing crystallizing is carried out in stainless steel triple effect evaporator, crystal is on Vibratingfluidbeddrier
100 ± 10 DEG C are dried, and byproduct ammonium carbonate is made.
Slag is put into leaching tanks, sulfuric acid is then poured into leaching tanks, the volumetric concentration of sulfuric acid is 20%-40%, liquid
Gu than being 3:1, and being extracted to leachate using P204, TBP and sec-octyl alcohol, then electrolysis obtains the gold such as gallium, vanadium, titanium, zirconium
Belong to.
Embodiment three: a kind of red mud magnetizing roast comprehensive utilization process, with embodiment one the difference is that: to magnetic separation
The Iron concentrate that machine is isolated is further carried out reverse flotation impurity elimination and improves Iron concentrate grade.Specific step is as follows:
(1) Iron Ore Powder is carried out to extra-fine grinding in the ball mill to 250 mesh of average fineness, wherein 250-300 mesh accounts for total amount
90% or more.
(2) ultra-fine Iron Ore Powder is put into flotation cell, water is added and is stirred into pulp-water, so that ultra-fine Iron Ore Powder is suspended in
In solution, in solution the mean concentration of Iron Ore Powder be 30g/L, water temperature control at 40 DEG C, be added DBU adjust pulp-water pH value to
11, speed of agitator 1200r/min.
(3) it is added flotation agent into solution, the mass ratio of flotation agent and Iron Ore Powder is 0.1-0.15:1, most preferably 0.12.
The ingredient of flotation agent are as follows: 25%% collecting agent LKY, 45% starch, 30%CaO.And it is stirred 10min, flotation time 30min.
(4) substance gone out to reverse flotation carries out selected processing, obtains more pure titanium, aluminium compound.
If the Iron concentrate after red mud magnetizing roast magnetic separation influences iron product still containing impurity such as fraction partial-titanium, aluminium, silicon
The raising of position, the positive production and marketing that the impurity titanium aluminium silicon in Iron concentrate also affects Iron concentrate is sold and profit.Therefore the side of reverse flotation is used
Formula is selected flotation agent to carry out further flotation leaching to titanium, aluminium, silicon, is improved so that iron be sampled.By handling reverse flotation
To ultra-fine Iron concentrate detected again, iron content after the more independent magnetic separation of grade improves 7%-10%.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention all belong to the scope of protection of the present invention.It should be pointed out that pair
For those skilled in the art, several improvements and modifications without departing from the principle of the utility model,
These improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (9)
1. a kind of red mud magnetizing roast utilization system, it is characterised in that: including set gradually by process blender (1),
The feed inlet of dryer (2), rotary kiln (3), magnetic separator (4), filter press (5), blender (1) passes through the first conveying equipment (11)
External red mud source is connected, the discharge port of blender (1) is connect by the second conveying equipment (12) with the feed inlet of dryer (2)；
Ball mill is equipped between dryer (2) and rotary kiln (3), the discharge port of dryer (2) passes through third conveying equipment (13) and ball
The feed inlet of grinding machine connects, and the discharge port of ball mill is connect with the feed inlet of rotary kiln (3)；Rotary kiln is provided with coke oven on (3)
The discharge port of gas piping (31), rotary kiln (3) is connect by the 4th conveying equipment (14) with the feed inlet of magnetic separator (4)；Magnetic
Machine (4) are selected to be equipped with magnetism outlet and non magnetic outlet, non magnetic outlet passes through the 5th conveying equipment (15) and filter press (5)
Feed inlet connection.
2. red mud magnetizing roast utilization system according to claim 1, it is characterised in that: the filter press (5)
Discharge port is connected with batch mixer (6) by the 6th conveying equipment (16).
3. red mud magnetizing roast utilization system according to claim 2, it is characterised in that: the batch mixer (6)
Discharge port is connected with molding machine (7) by the 7th conveying equipment (17).
4. red mud magnetizing roast utilization system according to claim 1, it is characterised in that: in the magnetic separator (4)
Portion is successively arranged the first field regions and the second field regions from feed inlet to discharge port direction, and the first field regions intensity is 800-
1000HS, the second field regions intensity are 1400-2500HS.
5. red mud magnetizing roast utilization system according to claim 1, it is characterised in that: the rotary kiln (3) with
Heat exchanger is equipped between dryer (2).
6. red mud magnetizing roast utilization system according to claim 1, it is characterised in that: the blender (1)
Additive funnel is installed at feed inlet.
7. red mud magnetizing roast utilization system according to claim 1, it is characterised in that: the utilization system
Further include reaction kettle, filter bed and flash dryer.
8. red mud magnetizing roast utilization system according to claim 7, it is characterised in that: the utilization system
It further include calcination furnace.
9. red mud magnetizing roast utilization system according to claim 7, it is characterised in that: the utilization system
It further include stainless steel triple effect evaporator and Vibratingfluidbeddrier.
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