CN106082322A - A kind of titanium-containing blast furnace slag mineralization of carbon dioxide coproduction TiO2, Al2o3method - Google Patents
A kind of titanium-containing blast furnace slag mineralization of carbon dioxide coproduction TiO2, Al2o3method Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/24—Magnesium carbonates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/20—Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts
- C01F7/26—Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts with sulfuric acids or sulfates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Abstract
The open one of the present invention utilizes titanium-containing blast furnace slag mineralising CO2Coproduction TiO2And Al2O3Method.Said method comprising the steps of: (1) is baking mixed with ammonium sulfate by titanium-containing blast furnace slag, obtain fired slags and ammonia, ammonia water absorbs and obtains ammonia；(2) fired slags water logging goes out and is filtrated to get leachate and leached mud；(3) ammonia and the carbon dioxide reaction of the leached mud of step 2, step 1 are obtained mineralising slag and mineralising mother solution；(4) leachate of step 2 is regulated pH value of solution, fractional precipitation filtration with the ammonia of step 1 and can obtain metatitanic acid and aluminum hydroxide precipitation and rich magnesium solution；(5) ammonia and the carbon dioxide reaction of the rich magnesium solution in step 4, step 1 are obtained magnesium carbonate precipitation and mineralising mother solution；(6) the mineralising mother solution mixing of step 3 and 5 evaporate, cools down, crystallized and obtain ammonium sulfate solids, recycling；(7) precipitate of step 4 is calcined respectively acquisition TiO2And Al2O3。
Description
Technical field
The invention belongs to CO2Reduce discharging and field of solid waste resource utilization, particularly relate to titanium-containing blast furnace slag mineralising and seal up for safekeeping
Carbon dioxide produces the method for high added value titanium, aluminum oxide simultaneously.
Background technology
Since the industrial revolution, a large amount of use of Fossil fuel causes CO in air2Concentration drastically raises, and thus causes
Greenhouse effect causes global sea and rises, and arid, flood and extreme severe cold weather frequently occur, to earth ecology and the mankind
Life causes significant damage.China has become as the carbon emission country that the whole world is maximum at present, and Chinese Government faces international community
Huge emission reduction.Energy resource structure based on China's " rich coal, oil starvation, few gas " and the low present situation of non-fossil energy accounting,
It is to maintain to realize CO under China's economic high speed development condition that end reduces discharging2The extensive realistic choice reduced discharging.At present, CCUS skill
The art trapping of the carbon dioxide (, utilize and seal up for safekeeping) is topmost end emission reduction strategy, studied the most widely in the whole world with
Test.But, it is simple that to seal process economics up for safekeeping poor, if the process of sealing up for safekeeping can the high chemicals of by-product added value or (with)
Externally export energy, then process economics will significantly improve.Based on this, Sichuan University proposes CO2The science that mineralising utilizes
Thought, by CO2As a kind of resource, silicate or aluminosilicate mineral mineralising at the calcium-magnesium-containing utilizing nature to enrich are fixed
CO2Meanwhile, extract the high added value chemical constituent of wherein association, mineralising is reacted low level chemical energy and is used or is changed into electricity
Can export, synchronously complete CO2Reduce discharging, resource (energy) is developed and useful chemicals production multitask, it is possible to achieve be in the black
Under the conditions of CO2Reduce discharging.Titanium, as a kind of important strategic resource, is widely used in the fields such as Aero-Space, chemical industry, metallurgy.
Chinese Titanium aboundresources, reserves account for the 30% of world's gross reserves, mainly contain and hold in Sichuan-Xichang Region and Hebei
In the vanadium titano-magnetite of moral.But, China's current titanium resource utilization rate is the lowest.During vanadium titano-magnetite ore dressing, about
The titanium of 54% enters into iron ore concentrate, subsequently enters blast furnace process, forms titanium-containing blast furnace slag.China will be about discharging 20,000,000 every year
Ton TiO2Content is the blast furnace slag of 8～25%, and pile up like a mountain for a large amount of titanium-containing blast furnace slags, not only occupies substantial amounts of soil, causes titanium
The waste of resource, and pollute environment.
The report utilizing titanium-containing blast furnace slag is a lot, and such as Chinese patent CN 1746126A discloses and utilizes electromagnetic wave pair
Titanium-containing blast furnace slag radiates, then with sulphuric acid to its carry out selectivity acidolysis, hydrolyze, the technique such as calcining prepares the side of rich-titanium material
Method；Chinese patent CN 86108511A discloses and prepares titanium dioxide technique with sulfuric acid process leaching titaniferous blast furnace；Chinese patent CN
200810011305.7 disclose the method using the raw material roasting such as titanium-containing blast furnace slag and ammonium sulfate to prepare vegetable fertilizer, but roast
The ammonia of burning process volatilization, either with or without recycling, pollutes environment, and the added value of fertilizer is low simultaneously；Chinese patent
CN101988158A discloses the method for comprehensive utilization of a kind of titanium-containing waste residues (actually titanium-containing blast furnace slag): (1) is by titaniferous
Waste residue and ammonium sulfate, potassium sulfate roasting at 200 ~ 500 DEG C, obtain blocks of solid and ammonia；(2) by above-mentioned blocks of solid water
Soaking, be filtrated to get filtrate and water logging slag, water logging slag is used for making cement additire；(3) being passed through in filtrate by ammonia, control ph is divided
It is not 1.8 ~ 3.5,5.8 ~ 7.5, titanium, aluminum are reclaimed with the form of hydrated titanium dioxide and aluminum hydroxide precipitation respectively.The method
The subject matter existed is: 1. water logging slag is mainly composed of calcium sulfate and silicon dioxide, and cement products has for sulfur content
Strict restriction, therefore, water logging slag is difficult by；2. owing to water logging slag containing a large amount of sulfate radical, it is meant that roasting process
The amount of middle generation ammonia is much larger than in flow process and is used for ammonia needed for titanium aluminum precipitation, therefore, this technique a large amount of ammonia of certainty by-product, storage
Fortune difficulty.
Summary of the invention
For existing titanium-containing blast furnace slag application technology as the second resource and CO2The deficiency that mineralising Plugging Technology Applied exists, the present invention
Purpose be to provide that a kind of reaction condition is gentle, technique is simple, can high added value titanium aluminum group in high efficiente callback titanium-containing blast furnace slag
Point, and utilize substantial amounts of calcium ions and magnesium ions in titanium-containing blast furnace slag (average CaO+MgO >=30% in titanium-containing blast furnace slag) mineralising to fix simultaneously
CO2Method, it is achieved the atom economy of each component of titanium-containing blast furnace slag utilizes, and considerably improves the economy of process.
The concrete technology step of the present invention is as follows:
1, titanium-containing blast furnace slag roasting
By granularity be 45-150 μm titanium-containing blast furnace slag powder and ammonium sulfate in mass ratio for 1:4～15 mix homogeneously, 250～
Roasting 30 ~ 240min at 450 DEG C, obtains block fired slags and tail gas after reaction, in tail gas ammonia water absorb and concentrate
Become strong aqua ammonia.
2, fired slags water logging
Fired slags step 1 obtained uses water logging to go out, and leaching condition is: temperature 40～75 DEG C, the time 30～240min, liquid-solid
It is 1:1～6:1 than (g/g), leaches and finish, filter, obtain the leached mud rich in calcium sulfate and the leaching rich in titanium magnalium metal ion
Go out liquid
3, water logging slag mineralising
The ammonia that water logging slag step 2 obtained and step 1 obtain is mixed into slurry, controls rubbing of calcium sulfate and ammonia in water logging slag
Your ratio is 1:2, and being passed through carbon dioxide reacts, and reacts 30 ~ 200min, filter, obtain rich in calcium carbonate at 30～60 DEG C
Mineralising slag and rich in the mineralising mother solution 1 of ammonium sulfate.
4, titanium aluminium ion fractional precipitation in leachate
Ammonia step 1 obtained adds in the leachate that step 2 obtains, and controls pH0.5～4, makes the titanium ion in leachate
Precipitation and magnalium ion does not precipitates, filter, obtain H2TiO3Precipitation slag and the mother liquor of precipitation of ammonium 1 rich in magnalium sulfate and ammonium sulfate；
In mother liquor of precipitation of ammonium 1, add the ammonia that obtains of step 1 again, control pH5～8, make the aluminium ion precipitation in solution and magnesium ion not
Precipitation, filters, obtains Al (OH)3Precipitation slag and the mother liquor of precipitation of ammonium 2 rich in magnesium sulfate and ammonium sulfate.Above-mentioned precipitation process controls
Temperature is 20 ~ 60 DEG C.
5, rich magnesium solution mineralising
Adding the ammonia that step 1 obtains in mother liquor of precipitation of ammonium 2 in step 4, in control solution, magnesium sulfate with the mol ratio of ammonia is
1:2, is passed through carbon dioxide, reacts 30～300 min at 20～60 DEG C, obtains magnesium carbonate precipitation after filtering and rich in sulphuric acid
The mineralising mother solution 2 of ammonium.
6, the recycling of ammonium sulfate
The mineralising mother solution 1 and 2 rich in ammonium sulfate step 3 and step 5 obtained mixes, and evaporation and concentration, crystallisation by cooling obtain
Ammonium sulfate solids, for step 1, it is achieved that recycling completely of ammonium sulfate.
7, calcining
The H that step 4 is obtained2TiO3At 1000 DEG C, calcine 60min obtain TiO2, Al (OH)360min is calcined at 500 DEG C
Obtain Al2O3。
In the technology path that the present invention provides, first ammonium sulfate be decomposed into ammonium hydrogen sulfate and ammonia, then ammonium hydrogen sulfate
Carrying out acidolysis reaction with titanium-containing blast furnace slag again, owing to ammonium hydrogen sulfate fusing point is relatively low, only 147 DEG C, therefore, ammonium sulfate and titaniferous are high
Slag calcination is substantially liquid-solid reaction, contributes to mass transfer and heat transfer.The ammonia available water that Decomposition of ammonium sulfate goes out is absorbed as
Subsequent technique uses.Roasting process make various main metal element in titanium-containing blast furnace slag be separately converted to correspondence sulfate:
Al2(SO4)3、MgSO4、CaSO4And TiOSO4, leaching stage just can make magnesium, aluminum, titanium sulfate completely in solution,
And calcium sulfate is stayed in slag, leachate ammonia fractional precipitation titanium, aluminum, separate after titanium aluminum containing mother liquid of magnesium and sulfur acid calcium
Water logging slag may be used for mineralization of carbon dioxide, respectively obtains high-purity carbonic acid magnesium precipitate and calcium carbonate and the mineralising of silicon dioxide
Slag, mineralising slag can be as the raw material producing cement, it is to avoid the exploitation of natural ore.
The present invention compared with prior art, has the advantage that
1, the present invention overflows ammonia as medium with ammonium sulfate and titanium-containing blast furnace slag roasting process, and in water logging slag, calcium sulfate is as ore deposit
Change raw material, utilize CO dexterously2Fixing seal reaction up for safekeeping and achieve recycling completely of ammonium sulfate in system, therefore, this work
Skill has CO2Reduce discharging with solid waste and produce high added value titanium dioxide and aluminium oxide multiple benefits simultaneously.
2, reaction condition of the present invention is gentle, and technique is simple, and low cost has industrial applications prospect.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is elaborated, but protection scope of the present invention is not limited only to following reality
Execute example.
In following each embodiment, the chemical composition (mass percent) of the titanium-containing blast furnace slag used is 21.19% TiO2、
1.16%TFe, 22.55% SiO2、26.84% CaO、7.25% MgO、13.69% Al2O3And other 7.32%.
Embodiment one
(1) uniformly mix levigate for titanium-containing blast furnace slag with ammonium sulfate to-150 μm, control titanium-containing blast furnace slag and ammonium sulfate mass ratio
For 1:4.
(2) compound that step (1) obtains is placed in tube furnace, is warming up to 350 DEG C with the rate program of 10 DEG C/min,
Continuing roasting 150min, obtain fired slags and be cooled to room temperature after reaction, the ammonia water that roasting process produces absorbs.
(3) the fired slags water logging that step (2) obtains being gone out, in water-bath, constant temperature stirring 240min at 40 DEG C, liquid-solid
Controlling to be 1:1 than (g/g), the product obtained, through sucking filtration, obtains the infusion rich in titanium magnalium metal ion and is mainly composed of
CaSO4And SiO2Water logging slag.
(4) the ammonia furnishing slip that will obtain in the water logging slag obtained in step (3) and step (2), controls in water logging slag
Calcium sulfate is 1:2 with the mol ratio of ammonia, is passed through carbon dioxide, reacts 60min, filter, obtain being mainly composed of carbon at 45 DEG C
The mineralising slag of acid calcium and rich in the mineralising mother solution 1 of ammonium sulfate.
(5) infusion that ammonia addition step (3) step (2) obtained obtains carries out precipitation, precipitation temperature
Being 35 DEG C, controlling terminal pH is 1.3, filters, obtains H2TiO3Precipitation and the mother liquor of precipitation of ammonium 1 rich in magnalium ion.
(6) mother liquor of precipitation of ammonium that ammonia addition step (5) step (2) obtained obtains proceeds precipitation, heavy
Shallow lake temperature is 35 DEG C, and controlling terminal pH is 6, filters, obtains Al (OH)3Precipitation and the mother liquor of precipitation of ammonium 2 rich in magnesium ion.
(7) ammonia that step (2) obtained adds in the mother liquor of precipitation of ammonium 2 that step (6) obtains, control in solution magnesium sulfate with
The mol ratio of ammonia is 1:2, is passed through carbon dioxide, reacts 80min, filter at 55 DEG C, obtains magnesium carbonate precipitation and rich in sulphuric acid
The mineralising mother solution 2 of ammonium.
(8) H that step (5) is obtained2TiO3At 1000 DEG C, calcine 60min obtain TiO2, Al that step (6) obtains
(OH)3At 500 DEG C, calcine 60min obtain Al2O3。
(9) the mineralising mother solution 1 rich in ammonium sulfate that step (4) and step (7) obtained and 2-in-1 also, evaporate, cool down, tie
Crystalline substance, the solid ammonium sulfate obtained is recycled to step (1).
Through analyzing, under these process conditions the conversion ratio of Ca be 89%, the leaching rate of Ti be 85%, the leaching rate of Mg is
86%, the leaching rate of aluminum is 81%, and the rate of deposition of Ti is 87%, and the rate of deposition of Al is 91%, the rate of deposition 88% of Mg, CO2Mineralization rate is
248kg/t blast furnace slag.
Embodiment two
(1) uniformly mixing levigate for titanium-containing blast furnace slag with ammonium sulfate to-75 μm, controlling titanium-containing blast furnace slag with ammonium sulfate mass ratio is
1:7。
(2) compound step (1) obtained is as in tube furnace, is warming up to 250 DEG C with the rate program of 10 DEG C/min
Roasting 240min, obtains fired slags and is cooled to room temperature after reaction, the ammonia water that roasting process produces absorbs.
(3) the fired slags water logging that step (2) obtains being gone out, in water-bath, at 60 DEG C, constant temperature stirs 90min, liquid-solid ratio
(g/g) controlling is 6:1, and the product obtained and is mainly composed of rich in the infusion of titanium magnalium metal ion through sucking filtration isolated
CaSO4And SiO2Water logging slag.
(4) the ammonia furnishing slip that will obtain in the water logging slag obtained in step (3) and step (2), controls in water logging slag
Calcium sulfate is 1:2 with the mol ratio of ammonia, is passed through carbon dioxide, reacts 200min, filter, obtain being mainly composed of carbon at 30 DEG C
The mineralising slag of acid calcium and rich in the mineralising mother solution 1 of ammonium sulfate.(5) ammonia step (2) obtained adds the water that step (3) obtains
Carrying out precipitation in immersion, precipitation temperature is 60 DEG C, and controlling terminal pH is 0.5, filters, obtains H2TiO3Precipitate and rich in aluminum
The mother liquor of precipitation of ammonium 1 of magnesium ion.
(6) mother liquor of precipitation of ammonium that ammonia addition step (5) step (2) obtained obtains proceeds precipitation, heavy
Shallow lake temperature is 60 DEG C, and controlling terminal pH is 8, filters, obtains Al (OH)3Precipitation and the mother liquor of precipitation of ammonium 2 rich in magnesium ion.
(7) ammonia that step (2) obtained adds in the mother liquor of precipitation of ammonium 2 that step (6) obtains, control in solution magnesium sulfate with
The mol ratio of ammonia is 1:2, is passed through carbon dioxide, reacts 30min, filter at 60 DEG C, obtains magnesium carbonate precipitation and rich in sulphuric acid
The mineralising mother solution 2 of ammonium.
(8) H that step (5) is obtained2TiO3At 1000 DEG C, calcine 60min obtain TiO2, Al that step (6) obtains
(OH)3At 500 DEG C, calcine 60min obtain Al2O3。
(9) the mineralising mother solution 1 rich in ammonium sulfate that step (4) and step (7) obtained and 2-in-1 also, evaporate, cool down, tie
Crystalline substance, the solid ammonium sulfate obtained is recycled to step (1).
Through analyzing, under these process conditions the conversion ratio of Ca be 93%, the leaching rate of Ti be 89%, the leaching rate of Mg is
91%, the leaching rate of aluminum is 82%, and the rate of deposition of Ti is 90%, and the rate of deposition of Al is 94%, the rate of deposition 91% of Mg, CO2Mineralization rate is
262kg/t blast furnace slag.
Embodiment three
(1) uniformly mixing levigate for titanium-containing blast furnace slag with ammonium sulfate to-45 μm, controlling titanium-containing blast furnace slag with ammonium sulfate mass ratio is
1:15。
(2) compound step (1) obtained is as in tube furnace, is warming up to 450 DEG C with the rate program of 10 DEG C/min
Roasting 30min, obtains fired slags and is cooled to room temperature after reaction, the ammonia water that roasting process produces absorbs.
(3) the fired slags water logging that step (2) obtains being gone out, in water-bath, at 75 DEG C, constant temperature stirs 30min, liquid-solid ratio
(g/g) controlling is 3:1, and the product obtained and is mainly composed of rich in the infusion of titanium magnalium metal ion through sucking filtration isolated
CaSO4And SiO2Water logging slag.
(4) the ammonia furnishing slip that will obtain in the water logging slag obtained in step (3) and step (2), controls in water logging slag
Calcium sulfate is 1:2 with the mol ratio of ammonia, is passed through carbon dioxide, reacts 30min, filter, obtain being mainly composed of carbon at 60 DEG C
The mineralising slag of acid calcium and rich in the mineralising mother solution 1 of ammonium sulfate.(5) ammonia step (2) obtained adds the water that step (3) obtains
Carrying out precipitation in immersion, precipitation temperature is 20 DEG C, and controlling terminal pH is 4, filters, obtains H2TiO3Precipitate and rich in magnalium
The mother liquor of precipitation of ammonium 1 of ion.
(6) mother liquor of precipitation of ammonium that ammonia addition step (5) step (2) obtained obtains proceeds precipitation, heavy
Shallow lake temperature is 20 DEG C, and controlling terminal pH is 5, filters, obtains Al (OH)3Precipitation and the mother liquor of precipitation of ammonium 2 rich in magnesium ion.
(7) ammonia that step (2) obtained adds in the mother liquor of precipitation of ammonium 2 that step (6) obtains, control in solution magnesium sulfate with
The mol ratio of ammonia is 1:2, is passed through carbon dioxide, reacts 300min, filter at 20 DEG C, obtains magnesium carbonate precipitation and rich in sulphuric acid
The mineralising mother solution 2 of ammonium.
(8) H that step (5) is obtained2TiO3At 1000 DEG C, calcine 60min obtain TiO2, Al that step (6) obtains
(OH)3At 500 DEG C, calcine 60min obtain Al2O3。
(9) the mineralising mother solution 1 rich in ammonium sulfate that step (4) and step (7) obtained and 2-in-1 also, evaporate, cool down, tie
Crystalline substance, the solid ammonium sulfate obtained is recycled to step (1).Through analyzing, under these process conditions the conversion ratio of Ca be 95%, Ti
Leaching rate is 93%, and the leaching rate of Mg is 95%, the leaching rate of aluminum is 85%, and the rate of deposition of Ti is 95%, and the rate of deposition of Al is 99%,
The rate of deposition 98% of Mg, CO2Mineralization rate is 272kg/t blast furnace slag.
Claims (9)
1. a titanium-containing blast furnace slag mineralization of carbon dioxide coproduction TiO2And Al2O3Method, it is characterised in that comprise the following steps:
The titanium-containing blast furnace slag powder of fine grinding than is uniformly mixed by certain mass by step 1 titanium-containing blast furnace slag roasting with ammonium sulfate,
React a period of time under uniform temperature, obtain block fired slags and tail gas, tail gas is mainly ammonia, absorb with water and make ammonia
Water；
The fired slags obtained in step 1 employing water logging is gone out by step 2 fired slags water logging, and leaching slurry, through solid-liquid separation, obtains
Rich in calcium sulfate and the leached mud of silicon dioxide and the leachate rich in titanium magnalium metal ion；
The ammonia mixing furnishing slurry that step 2 is obtained leached mud by step 3 water logging slag mineralising and step 1 obtains, in uniform temperature
The lower carbon dioxide that is passed through in slurry, reaction a period of time after, slurry through solid-liquid separation, obtain rich mineralising slag calciferous and
Mineralising mother solution 1 rich in ammonium sulfate；
The ammonia that in step 4 leachate, step 1 is obtained by the fractional precipitation of titanium aluminium ion adds in the leachate that step 2 obtains, control
PH processed, make in leachate titanium ion precipitation and magnalium ion does not precipitates, filter, obtain H2TiO3Precipitation slag and rich in magnalium sulfur
The mother solution 1 of hydrochlorate and ammonium sulfate；In mother solution 1, add the ammonia that step 1 obtains, control pH, make the aluminium ion in mother solution 1 precipitate
And magnesium ion does not precipitates, after filtration, obtain Al (OH)3Precipitation slag and the mother solution 2 rich in magnesium sulfate and ammonium sulfate；
The ammonia that step 1 is obtained by the rich magnesium solution mineralising of step 5 joins in the mother solution 2 that step 4 obtains, and is passed through dioxy simultaneously
Changing carbon, react a period of time, slurry, through solid-liquid separation, obtains magnesium carbonate mineralising slag and the mineralising mother solution 2 rich in ammonium sulfate；
The mineralising mother solution 2 that the step 6 ammonium sulfate mineralising mother solution 1 that step 3 obtained of circulation and step 5 obtain mixes, dense through evaporation
Contracting, cool down, crystallize, the solid ammonium sulfate obtained, for step 1, it is achieved that recycling completely of ammonium sulfate.
2. step 7 is calcined, H step 4 obtained2TiO3、Al(OH)3Precipitation carries out calcining respectively and obtains TiO2And Al2O3。
A kind of titanium-containing blast furnace slag mineralization of carbon dioxide coproduction TiO2And Al2O3Method, its feature
It is that titanium-containing blast furnace slag granularity 45-150 μm described in step 1, titanium-containing blast furnace slag are 1:4～15 with the mass ratio of ammonium sulfate.
A kind of titanium-containing blast furnace slag mineralization of carbon dioxide coproduction TiO2And Al2O3Method, its feature
It is that the sintering temperature described in step 1 is 250 ~ 450°C, roasting time are 30 ~ 240 min.
A kind of titanium-containing blast furnace slag mineralization of carbon dioxide coproduction TiO2And Al2O3Method, its feature
Being that water logging liquid-solid ratio (g/ g) described in step 2 is 1:1～6:1, extraction temperature is 40～75 DEG C, extraction time be 30～
240min。
A kind of titanium-containing blast furnace slag mineralization of carbon dioxide coproduction TiO2And Al2O3Method, its feature
Be in mixed slurry described in step 3 that the mol ratio of calcium sulfate and ammonia is 1:2, mineralising reaction temperature is 30～60 DEG C, reaction time
Between be 60 ~ 240 min.
A kind of titanium-containing blast furnace slag mineralization of carbon dioxide coproduction TiO2And Al2O3Method, its feature
Being in step 4, precipitation pH of titanium is 0.5～4, and precipitation pH of aluminum precipitation is 5～8, and precipitation reaction temperature is 20 ~ 60 DEG C.
A kind of titanium-containing blast furnace slag mineralization of carbon dioxide coproduction TiO2And Al2O3Method, its feature
Being in step 5, in rich magnesium solution, magnesium ion is 1:2 with the mol ratio of ammonia in addition ammonia, and the reaction temperature of mineralization process is
20～60 DEG C, the response time be 30～300 min.
A kind of titanium-containing blast furnace slag mineralization of carbon dioxide coproduction TiO2And Al2O3Method, its feature
It is H in step 72TiO3Calcining heat be 1000 DEG C, the time is 60min, Al (OH)3Calcining heat be 500 DEG C, the time
For 60min.
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| CN106830037A (en) * | 2017-02-17 | 2017-06-13 | 四川大学 | One kind is using blast furnace slag mineralising CO2The method of coproduction ammonia-alum |
| CN107236870A (en) * | 2017-06-22 | 2017-10-10 | 中国科学院过程工程研究所 | A kind of method of v-bearing steel slag carbonization vanadium extraction |
| CN107309077A (en) * | 2017-08-09 | 2017-11-03 | 攀枝花学院 | The method that rich titanium ore is produced using blast furnace slag |
| CN107522215A (en) * | 2017-08-14 | 2017-12-29 | 四川大学 | A kind of method of chloride titanium slag dechlorination, mineralization of carbon dioxide coproduction titanium white and ammonia-alum |
| CN108607559A (en) * | 2018-05-02 | 2018-10-02 | 四川大学 | A kind of method-preparation SCR catalyst for denitrating flue gas of titanium-containing blast furnace slag comprehensive utilization |
| CN109174918A (en) * | 2018-09-18 | 2019-01-11 | 四川大学 | The method of microwave activation blast furnace slag |
| CN112357933A (en) * | 2020-11-12 | 2021-02-12 | 重庆大学 | Mineralization of CO by steel slag2Method for co-producing CAN type zeolite |
| CN113750769A (en) * | 2021-11-10 | 2021-12-07 | 天津市新天钢钢铁集团有限公司 | Purification of sintering flue gas and solidification of CO by using LF refining waste residue2Method (2) |
| CN114074953A (en) * | 2020-08-10 | 2022-02-22 | 四川大学 | Titanium-containing blast furnace slag or chlorinated tailings and red gypsum mineralized CO2Method (2) |
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| CN114438335A (en) * | 2021-12-29 | 2022-05-06 | 绵阳师范学院 | Titanium-containing blast furnace slag treatment method |
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| CN106830037A (en) * | 2017-02-17 | 2017-06-13 | 四川大学 | One kind is using blast furnace slag mineralising CO2The method of coproduction ammonia-alum |
| CN106830037B (en) * | 2017-02-17 | 2018-07-06 | 四川大学 | It is a kind of to utilize blast furnace slag mineralising CO2The method of coproduction ammonia-alum |
| CN107236870A (en) * | 2017-06-22 | 2017-10-10 | 中国科学院过程工程研究所 | A kind of method of v-bearing steel slag carbonization vanadium extraction |
| CN107309077B (en) * | 2017-08-09 | 2019-02-22 | 攀枝花学院 | The method for producing rich titanium ore using blast furnace slag |
| CN107309077A (en) * | 2017-08-09 | 2017-11-03 | 攀枝花学院 | The method that rich titanium ore is produced using blast furnace slag |
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| CN108607559B (en) * | 2018-05-02 | 2021-02-19 | 四川大学 | Method for comprehensively utilizing titanium-containing blast furnace slag-preparation of SCR flue gas denitration catalyst |
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| CN112357933A (en) * | 2020-11-12 | 2021-02-12 | 重庆大学 | Mineralization of CO by steel slag2Method for co-producing CAN type zeolite |
| CN113750769A (en) * | 2021-11-10 | 2021-12-07 | 天津市新天钢钢铁集团有限公司 | Purification of sintering flue gas and solidification of CO by using LF refining waste residue2Method (2) |
| CN114438335A (en) * | 2021-12-29 | 2022-05-06 | 绵阳师范学院 | Titanium-containing blast furnace slag treatment method |
| CN114438335B (en) * | 2021-12-29 | 2024-02-09 | 绵阳师范学院 | Treatment method of titanium-containing blast furnace slag |
| CN114408964A (en) * | 2022-01-22 | 2022-04-29 | 北京工业大学 | Method for preparing nano titanium-magnesium-aluminum-containing hydrotalcite from titanium-containing blast furnace slag |
| CN116119710A (en) * | 2023-02-03 | 2023-05-16 | 衡阳市东氟新材料股份有限公司 | Preparation method of potassium fluotitanate |
| CN116119710B (en) * | 2023-02-03 | 2023-10-03 | 衡阳市东氟新材料股份有限公司 | Preparation method of potassium fluotitanate |
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