CN106834739B - A kind of method and its application mentioning aluminium from Quadratic aluminum dust - Google Patents
A kind of method and its application mentioning aluminium from Quadratic aluminum dust Download PDFInfo
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- CN106834739B CN106834739B CN201710041511.1A CN201710041511A CN106834739B CN 106834739 B CN106834739 B CN 106834739B CN 201710041511 A CN201710041511 A CN 201710041511A CN 106834739 B CN106834739 B CN 106834739B
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- 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
- C22B21/00—Obtaining aluminium
- C22B21/0015—Obtaining aluminium by wet processes
- C22B21/0023—Obtaining aluminium by wet processes from waste materials
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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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- 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
- C01F7/68—Aluminium compounds containing sulfur
- C01F7/74—Sulfates
- C01F7/743—Preparation from silicoaluminious materials, e.g. clays or bauxite
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Abstract
Then the method that the present invention relates to a kind of to mention aluminium from Quadratic aluminum dust is obtained to roasting clinker leaching, then after being separated by solid-liquid separation containing aluminum solutions and tailings by roasting after mixing Quadratic aluminum dust with ammonium sulfate and/or ammonium hydrogen sulfate with the sulfuric acid of water or low concentration.It can further convert containing aluminum solutions and be prepared for aluminium product.The present invention makes the aluminium in Quadratic aluminum dust be converted into water soluble compound by the method that Quadratic aluminum dust and ammonium sulfate and/or ammonium hydrogen sulfate roast, and then it can be leached using the sulfuric acid solution of water or low concentration, aluminium element recovery rate reaches as high as 90% or more, the use for avoiding high concentrated acid leaching agent simultaneously has many advantages, such as that low energy consumption, environmentally friendly and small to equipment extent of corrosion.
Description
Technical field
The invention belongs to non-ferrous metallurgy field more particularly to a kind of methods that aluminium is mentioned from Quadratic aluminum dust.
Background technique
Aluminium ash is a kind of bulk solid waste generated during aluminum smelting technology and Recycling Aluminum Industry, source can be summarized as with
Lower three aspects: electrolytic production of aluminum, aluminium consumer applications, aluminium scrap regeneration.According to the difference of aluminium content in aluminium ash, a secondary aluminium can be divided into
Ash and Quadratic aluminum dust.Aluminium ash and aluminium content is up to 15-80%.Quadratic aluminum dust be by the aluminium comprising 12-30%, be primarily referred to as from
Aluminium mistake is recycled in various wastes (such as secondary aluminium ash discards the aluminium skimmings generated in aluminum products and aluminum products processing, waste residue)
The aluminium ash generated in journey.According to statistics, the aluminium ash that China generates every year is up to 1.12-1.80 × 106t.With the increase of aluminium yield
To also it continue to increase with the yield of the expansion of application field, aluminium ash, along with cumulant over the years, this number will more shy
People.Since the difference in aluminium ash source results in the difference of its ingredient and content, some aluminium ashes contain a certain amount of heavy metal element,
Such as As, Cd, Cr, Pb.Therefore, reasonable utilization and improvement aluminium ash, can not only realize the secondary cycle benefit of bauxite resource, and right
Environment also has positive meaning.
Guo Xueyi et al. has studied the process that aluminium in Quadratic aluminum dust is extracted using low-temperature alkali smelting process, has inquired into sode ash matter
Ratio, salt ash mass ratio, smelting temperature, smelting time, different additive and the difference factors such as mixing method are measured to Al extraction efficiency
It influences (referring to " Quadratic aluminum dust low-temperature alkali melting research ", Guo Xueyi etc., Central South University's journal, 2012,43 (3): 26-31).
CN105039702A discloses a kind of leaching method of the valuable element in Quadratic aluminum dust, method includes the following steps: by two
Secondary aluminium ash is added in NaOH solution, and the Quadratic aluminum dust of 11-13g is added in the NaOH solution of every 100ml, forms mixture；It will
Above-mentioned mixture is added in ball mill, and ball milling 3-3.5 hours；It filters, filter residue is dried in a vacuum drying oven, obtaining can be again
The secondary aluminium ash powder utilized.
Generally, the method for aluminium mainly has the acid-hatching of young eggs and alkali fusion in recycling Quadratic aluminum dust at present.Alkali fusion is by aluminium ash
It is blended under high temperature or high temperature and pressure and is leached with sodium hydroxide, energy consumption is very big, and the residual of strong acid and strong base can be to environment
Cause very big pollution.The acid-hatching of young eggs generallys use H2SO4Or HCl carries out the leaching of aluminium ash, but acid-hatching of young eggs acid consumption it is big, to equipment
It is required that relatively high.Therefore a kind of environmental protection and energy saving are developed and the higher method for recycling aluminium from Quadratic aluminum dust of the rate of recovery just seems outstanding
For necessity.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of method that aluminium is mentioned from Quadratic aluminum dust, and this method uses two
Secondary aluminium ash and ammonium sulfate and/or ammonium hydrogen sulfate are baking mixed, are leached with the sulfuric acid solution of water or low concentration to roasting clinker,
The use that high concentrated acid leaching agent is avoided while improving the recovery rate of aluminium is the environmentally friendly high efficiency of one kind, low
The extracting method of energy consumption, has a good application prospect.
For achieve the above purposes, the present invention adopts the following technical scheme:
In a first aspect, the present invention provides a kind of method for mentioning aluminium from Quadratic aluminum dust, the described method comprises the following steps:
(1) it is roasted after mixing Quadratic aluminum dust and sulfate, the sulfate is ammonium sulfate and/or ammonium hydrogen sulfate；
(2) the roasting clinker after step (1) roasting is leached, is obtained after separation of solid and liquid containing aluminum solutions and tailings.
The present invention is baking mixed by selecting ammonium sulfate and/or ammonium hydrogen sulfate and Quadratic aluminum dust, makes the aluminium in Quadratic aluminum dust
(including aluminum contained compound and pure aluminum) is converted into water-soluble alum and/or aluminum sulfate, and then can use water or low
The sulfuric acid solution of concentration is leached, and the recovery rate of aluminium reaches as high as 90% or more, while reducing leaching temperature, avoids height
The use of concentration Acid leaching agent has many advantages, such as that low energy consumption, environmentally friendly and small to equipment extent of corrosion.
It is baking mixed by the way that ammonium sulfate and/or ammonium hydrogen sulfate and Quadratic aluminum dust progress is added, the aluminium in Quadratic aluminum dust can be made
(including aluminum contained compound and pure aluminum) reaction generates water-soluble alum and/or aluminum sulfate.Other sulfate such as sulphur
Sour sodium, potassium sulfate etc., be only capable of with a small amount of simple substance reactive aluminum remaining in Quadratic aluminum dust, and cannot in Quadratic aluminum dust contain calorize
It closes object to react, greatly reduces the recovery rate of aluminium.Using other ammonium salts such as ammonium carbonate and/or ammonium hydrogen carbonate etc., although
Can in Quadratic aluminum dust pure aluminum and a small amount of aluminum contained compound react, but the aluminium carbonate generated is unstable, easy decomposition, leads
Cause the recovery rate of aluminium almost nil.
According to the present invention, the method also includes it is baking mixed it is preceding Quadratic aluminum dust is crushed, grind, screening and water
The step of washing.
The present invention selects means well known in the art to grind broken Quadratic aluminum dust, does not do special limit to this
Fixed, illustratively, the grinding can be in ball mill, column mill, rod mill, tube mill, autogenous tumbling mill, rotation mortar formula roller mill, vertical
It is carried out in mill, multilayer Vertical Mill, vertical roll grinder or DMC grinding machine, but non-is only limitted to this.
The purpose of washing is to improve extraction efficiency to wash off the water-soluble salt in Quadratic aluminum dust.
According to the present invention, after the screening Quadratic aluminum dust particle partial size be not more than 150 μm, such as can be 1 μm, 5 μm,
Specific point value between 10 μm, 20 μm, 40 μm, 50 μm, 75 μm, 90 μm, 115 μm, 120 μm or 140 μm and above-mentioned numerical value,
As space is limited and for concise consideration, the specific point value that range described in the present invention no longer exclusive list includes.
According to the present invention, the sulfate radical and/or hydrogen sulfate in the aluminium element and sulfate in step (1) described Quadratic aluminum dust
The molar ratio of root be 1:(1-6.5), such as can be 1:1,1:1.5,1:2,1:2.5,1:3,1:3.5,1:4,1:4.5,1:5,
Specific point value between 1:5.5,1:6 or 1:6.5 and above-mentioned numerical value, as space is limited and for concise consideration, the present invention is not
The specific point value that range described in exclusive list includes again.
When selecting Quadratic aluminum dust and when ammonium sulfate and baking mixed ammonium hydrogen sulfate, aluminium element and sulfate radical and bisulfate ion
Molar ratio refers to the molar ratio of the sum of aluminium element and two kinds of acid ions.
The sulfate radical and/or bisulfate ion in aluminium element and sulfate in the present invention in step (1) described Quadratic aluminum dust
Molar ratio be preferably 1:(1.5-4), further preferably 1:(2-3).
When sulfate deficiency, the aluminium in Quadratic aluminum dust cannot react completely, reduce extraction efficiency；When sulfate excess
When, first is that causing the waste of raw material, second is that excessive sulfate enters containing aluminum solutions after being separated by solid-liquid separation, affect containing aluminum solutions
Later use.
According to the present invention, the temperature of step (1) described roasting is 360-600 DEG C, such as can be 360 DEG C, 380 DEG C, 400
DEG C, 420 DEG C, 440 DEG C, 460 DEG C, 480 DEG C, 500 DEG C, 520 DEG C, 540 DEG C, 560 DEG C, 580 DEG C or 600 DEG C and above-mentioned numerical value
Between specific point value, as space is limited and for concise consideration, range described in the present invention no longer exclusive list includes specific
Point value.
The temperature of step (1) described roasting is preferably 400-550 DEG C in the present invention.
According to the present invention, the time of step (1) described roasting be 1-6h, such as can be 1h, 1.5h, 2h, 2.5h, 3h,
Specific point value between 3.5h, 4h, 4.5h, 5h, 5.5h or 6h and above-mentioned numerical value, as space is limited and for concise consideration,
The specific point value that range described in the present invention no longer exclusive list includes.
The time of step (1) described roasting is preferably 2-4h in the present invention.
According to the present invention, step (1) roasting is divided into first segment roasting and second segment roasting.
Using two-stage roasting, it on the one hand can regulate and control the object phase of aluminium in roasting clinker, it is made more to be converted into water solubility
Alum and/or aluminum sulfate, the utilization rate of sulfate on the other hand can be improved, avoid the residual of sulfate.
According to the present invention, the temperature of the first segment roasting is 360-450 DEG C, such as can be 360 DEG C, 370 DEG C, 380
DEG C, 390 DEG C, 400 DEG C, 410 DEG C, 420 DEG C, 430 DEG C, 440 DEG C or the specific point value between 450 DEG C and above-mentioned numerical value, be limited to
Length and for concise consideration, the specific point value that range described in the present invention no longer exclusive list includes.
The temperature of heretofore described first segment roasting is preferably 400-425 DEG C.
According to the present invention, the time of first segment roasting is 0.5-3h, for example, can be 0.5h, 1h, 1.5h, 2h,
Specific point value between 2.5h or 3h and above-mentioned numerical value, as space is limited and for concise consideration, the no longer exhaustive column of the present invention
Lift the specific point value that the range includes.
The time of heretofore described first segment roasting is preferably 1-2h.
According to the present invention, the temperature of the second segment roasting is 460-600 DEG C, such as can be 460 DEG C, 500 DEG C, 550
DEG C or the specific point value between 600 DEG C and above-mentioned numerical value, as space is limited and for concise consideration, the present invention is no longer exhaustive
Enumerate the specific point value that the range includes.
The temperature of heretofore described second segment roasting is preferably 500-550 DEG C.
According to the present invention, the time of second segment roasting is 0.5-3h, for example, can be 0.5h, 1h, 1.5h, 2h,
Specific point value between 2.5h or 3h and above-mentioned numerical value, as space is limited and for concise consideration, the no longer exhaustive column of the present invention
Lift the specific point value that the range includes.
The time of heretofore described second segment roasting is preferably 1-2h.
Roasting of the present invention selects baking modes well known in the art to carry out, as long as can reach above-mentioned roasting effect i.e.
Can, particular determination is not done to this, illustratively, the roasting can carry out in Muffle furnace, but non-be only limitted to this.
Under above-mentioned roasting technique and roasting condition, the aluminium in Quadratic aluminum dust can be with ammonium sulfate and/or ammonium hydrogen sulfate
It is reacted, is more present in the form of alum and/or aluminum sulfate in roasting clinker, and then realize to the greatest extent
Subsequent efficient extraction.
According to the present invention, leaching liquid when step (2) described leaching is the acid solution that water or mass fraction are not more than 15%；
When being leached using acid solution, mass fraction can be 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%,
11%, the specific point value between 12%, 13%, 14% or 15% and above-mentioned numerical value is examined as space is limited and for concise
Consider, the specific point value that range described in the present invention no longer exclusive list includes.
Heretofore described acid solution is sulfuric acid solution.
In existing Quadratic aluminum dust acid leaching process because in Quadratic aluminum dust there are it is a certain amount of it is not soluble in water, be dissolved in acid contain
Aluminium compound, it usually needs the sulfuric acid solution using mass fraction greater than 30% is as leaching agent.The present invention passes through selection sulfuric acid
Ammonium and/or ammonium hydrogen sulfate and Quadratic aluminum dust is baking mixed and control to roasting condition contain the aluminium in Quadratic aluminum dust (including
Aluminium compound and pure aluminum) be largely converted into water soluble compound, thus can using the sulfuric acid solution of water or low concentration into
Row leaches.In addition, in leaching process, although certain acidity is conducive to leach acid-soluble aluminum contained compound, sulfate concentration
Aluminum sulfate can be precipitated when high, be unfavorable for leaching process.In addition the aluminium in present invention roasting clinker is largely water soluble compound,
Thus, the leaching liquid that the present invention selects is the sulfuric acid solution that water or mass fraction are not more than 15%.
According to the present invention, the liquid-solid ratio of leaching liquid and roasting clinker is 2-10 when step (2) described leaching, such as be can be
2, the specific point value between 3,4,5,6,7,8,9 or 10 and above-mentioned numerical value, as space is limited and for concise consideration, this hair
The specific point value that range described in bright no longer exclusive list includes.
The liquid-solid ratio of leaching liquid and roasting clinker is preferably 3-4 when step (2) described leaching in the present invention.
Heretofore described liquid-solid ratio refers to the volume (mL) of leaching liquid and the ratio between the quality (g) of roasting clinker.
According to the present invention, the temperature of step (2) described leaching be 25-160 DEG C, such as can be 25 DEG C, 30 DEG C, 40 DEG C,
50 DEG C, 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C, 110 DEG C, 120 DEG C, 130 DEG C, 140 DEG C, 150 DEG C or 160 DEG C and above-mentioned
Specific point value between numerical value, as space is limited and for concise consideration, range described in the present invention no longer exclusive list includes
Specific point value.
The temperature of step (2) described leaching is preferably 50-100 DEG C in the present invention, and further preferably 60-90 DEG C.
According to the present invention, the time of step (2) described leaching be 0.5-4h, such as can be 0.5h, 1h, 2h, 2.5h,
Specific point value between 3h, 3.5h or 4h and above-mentioned numerical value, as space is limited and for concise consideration, the present invention is no longer poor
The specific point value that the range includes is enumerated to the greatest extent.
The time of step (2) described leaching is preferably 0.5-2h, further preferably 0.5-1.5h in the present invention.
As a preferred technical solution, the method for the present invention that aluminium is mentioned from Quadratic aluminum dust the following steps are included:
(1) by aluminium element and sulfate radical and/or the molar ratio 1:(1.5-4 of bisulfate ion) by Quadratic aluminum dust and ammonium sulfate
And/or ammonium hydrogen sulfate mixing, 1-2h is first then roasted at 400-425 DEG C, then be warming up to 500-550 DEG C and continue to roast 1-2h；
After (2) selecting the sulfuric acid solution of water or mass fraction no more than 15% to roast by the liquid-solid ratio of 3-4 to step (1)
To roasting clinker 0.5-2h is leached at 50-100 DEG C, obtained after separation of solid and liquid containing aluminum solutions and tailings.
Second aspect, the present invention provide that a kind of method as described in relation to the first aspect is prepared containing aluminum solutions in aluminium product
Application in preparation.
Illustratively, described to can be used for preparing polyaluminium sulfate, aluminium oxide etc. containing aluminum solutions.
Compared with prior art, the present invention at least has the advantages that
The present invention method baking mixed by selection Quadratic aluminum dust and ammonium sulfate and/or ammonium hydrogen sulfate, and to roasting work
Skill has carried out specific optimization, so that the aluminium in Quadratic aluminum dust is converted into water soluble compound, and then can be at a lower temperature
Sulfuric acid solution with water or mass fraction no more than 15% is leached, and so that the recovery rate of aluminium is reached as high as 90% or more, simultaneously
Energy consumption is reduced, solves the problems, such as high concentration leaching agent corrosive equipment, pollution environment, is a kind of environmentally friendly efficient
Rate, the extracting method of low energy consumption, have a good application prospect.
Detailed description of the invention
The process flow chart of aluminium is mentioned in the slave Quadratic aluminum dust that Fig. 1 provides for one embodiment of the present invention.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, mentioning aluminium from Quadratic aluminum dust specifically comprises the processes of: Quadratic aluminum dust (to be crushed, grind by pre-treatment
Mill sieves, washing) after, it is mixed with sulfate (ammonium sulfate and/or ammonium hydrogen sulfate), mixture is roasted, with water or quality
Sulfuric acid solution of the score no more than 15% leaches the water soluble compound containing aluminium in roasting clinker, is obtained after separation of solid and liquid containing aluminium
Solution and waste residue can be used as raw material applied in the preparation of aluminium product containing aluminum solutions.
Of the invention for ease of understanding, it is as follows that the present invention enumerates embodiment.Those skilled in the art are it will be clearly understood that the implementation
Example is only to aid in the understanding present invention, should not be regarded as a specific limitation of the invention.
Embodiment 1
Each element content in Quadratic aluminum dust used in the present embodiment are as follows: Al 33.02%, Si 1.98%, Mg 0.94%, Ca
0.61%, V 1.03%, Fe 0.87%, Cl 4.16%, K 1.08%, Na 2.94%.
The method of aluminium is proposed from Quadratic aluminum dust are as follows:
(1) it is ground after being crushed Quadratic aluminum dust, water soluble salt is removed in washing after sieving with 100 mesh sieve, and then presses aluminium element and sulphur
The molar ratio of acid group be 1:1 proportion Quadratic aluminum dust is mixed with ammonium sulfate, by mixture in 430 DEG C of roasting 0.5h, then after
It is continuous to be warming up to 600 DEG C of roasting 0.5h；
(2) at 35 DEG C, the sulfuric acid of 15wt% of roasting clinker obtained by step (1) is soaked by the liquid-solid ratio (mL:g) of 4:1
3h is taken, then is obtained after being separated by solid-liquid separation containing aluminum solutions and tailings.It is computed, the recovery rate of aluminium is 76.32% in Quadratic aluminum dust.
Al is prepared using containing aluminum solutions2O3Method are as follows:
It will be put into the four-hole boiling flask with agitating paddle, condenser pipe, thermometer and feed opening obtained by step (2) containing aluminum solutions
It is heated to 75 DEG C.Stirring is opened, when low whipping speed is 450r/min, the molar ratio by aluminium in polymerizer and leachate is 1.8:
Alkaline polymerization agent sodium aluminate is added using alkali adding method at a slow speed in 1 proportion, polymerize 2.5h, and pH stablizes after 3.35, is cooled to 45 DEG C
And stop stirring, after curing 2h at this temperature, filtering is the liquid palymeric aluminium sulfate product prepared.The master of products obtained therefrom
Want index are as follows: Al2O39.46%, basicity 45.61%, pH3.35, relative density (20 DEG C) 1.28.
Embodiment 2
Each element content in Quadratic aluminum dust used in the present embodiment are as follows: Al 32.38%, Si 2.21%, Mg 0.85%, Ca
0.55%, V 1.04%, Fe 0.89%, Cl 3.98%, K 1.08%, Na 2.63%.
The method of aluminium is proposed from Quadratic aluminum dust are as follows:
(1) it is ground after being crushed Quadratic aluminum dust, water soluble salt is removed in washing after sieving with 100 mesh sieve, and then presses aluminium element and sulphur
The molar ratio of acid group be 1:3.5 proportion Quadratic aluminum dust is mixed with ammonium sulfate, by mixture in 425 DEG C of roasting 1h, then after
It is continuous to be warming up to 500 DEG C of roasting 2h；
(2) at 100 DEG C, the liquid-solid ratio (mL:g) by 5:1 will roast clinker water extraction 2h obtained by step (1), then pass through
It is obtained after separation of solid and liquid containing aluminum solutions and tailings.It is computed, the recovery rate of aluminium is 86.03% in Quadratic aluminum dust.
Al is prepared using containing aluminum solutions2O3Method are as follows:
90 DEG C will be warming up to containing aluminum solutions obtained by step (2), then under stirring, 10% carbonic acid is added thereto
It is heavy to obtain aluminium hydroxide then after being separated by solid-liquid separation for hydrogen ammonium salt solution 3 times of aluminium ion mole (additional amount of ammonium hydrogen carbonate be)
It forms sediment and liquid containing ammonium sulfate solution, aluminium hydroxide obtain aluminium oxide, obtains ammonium sulfate after ammonium sulfate crystallisation by cooling, return after being fired
It is back to step (1).
Embodiment 3
Each element content in Quadratic aluminum dust used in the present embodiment are as follows: Al 33.15%, Si 2.30%, Mg 1.00%, Ca
0.74%, V 1.17%, Fe 0.76%, Cl 3.96%, K 1.09%, Na 2.70%.
The method of aluminium is proposed from Quadratic aluminum dust are as follows:
(1) it is ground after being crushed Quadratic aluminum dust, water soluble salt is removed in washing after sieving with 100 mesh sieve, and then presses aluminium element and sulphur
The molar ratio of acid group be 1:3 proportion Quadratic aluminum dust is mixed with ammonium sulfate, by mixture in 415 DEG C of roasting 1.5h, then after
It is continuous to be warming up to 525 DEG C of roasting 2h；
(2) by the liquid-solid ratio (mL:g) of 3.5:1 that roasting clinker obtained by step (1) is molten with the sulfuric acid of 6wt% at 90 DEG C
Liquid leaching 1.5h, then obtain after being separated by solid-liquid separation containing aluminum solutions and tailings.It is computed, the recovery rate of aluminium is in Quadratic aluminum dust
91.59%.
Embodiment 4
Each element content in Quadratic aluminum dust used in the present embodiment are as follows: Al 38.90%, Si 4.05%, Mg 1.93%, Ca
1.13%, V 1.43%, Fe 1.18%.
The method of aluminium is proposed from Quadratic aluminum dust are as follows:
(1) Quadratic aluminum dust is mixed with ammonium hydrogen sulfate with the proportion that the molar ratio of bisulfate ion is 1:1.5 by aluminium element, it will
Mixture then proceedes to be warming up to 550 DEG C of roasting 1h in 400 DEG C of roasting 2h；
(2) by the liquid-solid ratio (mL:g) of 6:1 that roasting clinker obtained by step (1) is molten with the sulfuric acid of 12wt% at 95 DEG C
Liquid leaching 1h, then obtain after being separated by solid-liquid separation containing aluminum solutions and tailings.It is computed, the recovery rate of aluminium is in Quadratic aluminum dust
82.57%.
Embodiment 5
Each element content in Quadratic aluminum dust used in the present embodiment are as follows: Al 37.79%, Si 4.36%, Mg 1.97%, Ca
1.11%, V 2.48%, Fe 1.20%.
The method of aluminium is proposed from Quadratic aluminum dust are as follows:
(1) it is ground after being crushed Quadratic aluminum dust, water soluble salt is removed in washing after sieving with 100 mesh sieve, and then presses aluminium element and sulphur
The molar ratio of acid group and bisulfate ion is that the proportion of 1:6.5 mixes Quadratic aluminum dust with ammonium sulfate and ammonium hydrogen sulfate, by mixture
In 360 DEG C of roasting 3h, then proceed to be warming up to 460 DEG C of roasting 3h；
(2) by the liquid-solid ratio (mL:g) of 10:1 that roasting clinker obtained by step (1) is molten with the sulfuric acid of 5wt% at 155 DEG C
Liquid leaching 4h, then obtain after being separated by solid-liquid separation containing aluminum solutions and tailings.It is computed, the recovery rate of aluminium is in Quadratic aluminum dust
72.89%.
Embodiment 6
Compared with Example 2, in addition to that " by mixture in 425 DEG C of roasting 1h, will then proceed to be warming up to 500 in step (1)
DEG C roasting 2h " be revised as " by mixture in 425 DEG C of roasting 1h " outside, that is, remove second segment roasting, only progress first segment roasting,
He is partially all the same with embodiment 2.
By being analyzed and being calculated containing aluminum solutions and tailings to what is obtained, the recovery rate of aluminium is in Quadratic aluminum dust
61.64%.
Embodiment 7
Compared with Example 2, in addition to that " by mixture in 425 DEG C of roasting 1h, will then proceed to be warming up to 500 in step (1)
DEG C roasting 2h " be revised as " by mixture in 500 DEG C of roasting 2h " outside, that is, remove first segment roasting, only progress second segment roasting,
He is partially all the same with embodiment 2.
By being analyzed and being calculated containing aluminum solutions and tailings to what is obtained, the recovery rate of aluminium is in Quadratic aluminum dust
72.09%.
Comparative example 1
Compared with Example 2, other than the ammonium sulfate in step (1) is replaced with sodium sulphate, other parts and embodiment 2
It is all the same.
By the way that obtained solution and tailings are analyzed and calculated, the recovery rate of aluminium is 5.47% in Quadratic aluminum dust.
Comparative example 2
Compared with Example 2, other than the ammonium sulfate in step (1) is replaced with ammonium carbonate, other parts and embodiment 2
It is all the same.
By the way that obtained solution and tailings are analyzed and calculated, the aluminium in Quadratic aluminum dust is not leached.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (17)
1. a kind of method for mentioning aluminium from Quadratic aluminum dust, which is characterized in that the described method comprises the following steps:
(1) by aluminium element and sulfate radical and/or the molar ratio 1:(1-6.5 of bisulfate ion) by Quadratic aluminum dust and ammonium sulfate and/or
Ammonium hydrogen sulfate mixing, then first roasts 1-2h at 360-450 DEG C, then is warming up to 460-600 DEG C and continues to roast 1-2h；
(2) the roasting clinker after step (1) roasting is leached, is obtained after separation of solid and liquid containing aluminum solutions and tailings.
2. the method as described in claim 1, which is characterized in that the method also includes baking mixed preceding to Quadratic aluminum dust progress
It is broken, grinding, the step of sieving and wash.
3. method according to claim 2, which is characterized in that the partial size of Quadratic aluminum dust particle is not more than 150 μ after the screening
m。
4. the method as described in claim 1, which is characterized in that aluminium element and sulfate in step (1) described Quadratic aluminum dust
In sulfate radical and/or bisulfate ion molar ratio be 1:(1.5-4).
5. the method as described in claim 1, which is characterized in that aluminium element and sulfate in step (1) described Quadratic aluminum dust
In sulfate radical and/or bisulfate ion molar ratio be 1:(2-3).
6. the method as described in claim 1, which is characterized in that leaching liquid when step (2) described leaching is water or quality point
Number is not more than 15% acid solution.
7. method as claimed in claim 6, which is characterized in that the acid solution is sulfuric acid solution.
8. the method as described in claim 1, which is characterized in that the liquid of leaching liquid and roasting clinker when step (2) described leaching
Gu than being 2-10.
9. the method as described in claim 1, which is characterized in that the liquid of leaching liquid and roasting clinker when step (2) described leaching
Gu than being 3-4.
10. the method as described in claim 1, which is characterized in that temperature when step (2) described leaching is 25-160 DEG C.
11. the method as described in claim 1, which is characterized in that temperature when step (2) described leaching is 50-100 DEG C.
12. the method as described in claim 1, which is characterized in that temperature when step (2) described leaching is 60-90 DEG C.
13. the method as described in claim 1, which is characterized in that time when step (2) described leaching is 0.5-4h.
14. the method as described in claim 1, which is characterized in that time when step (2) described leaching is 0.5-2h.
15. the method as described in claim 1, which is characterized in that time when step (2) described leaching is 0.5-1.5h.
16. the method as described in claim 1, which is characterized in that the described method comprises the following steps:
(1) by aluminium element and sulfate radical and/or the molar ratio 1:(1.5-4 of bisulfate ion) by Quadratic aluminum dust and ammonium sulfate and/or
Ammonium hydrogen sulfate mixing, then first roasts 1-2h at 400-425 DEG C, then is warming up to 500-550 DEG C and continues to roast 1-2h；
(2) it is obtained after selecting the sulfuric acid solution of water or mass fraction no more than 15% to roast by the liquid-solid ratio of 3-4 to step (1)
Roasting clinker leaches 0.5-2h at 50-100 DEG C, is obtained after separation of solid and liquid containing aluminum solutions and tailings.
17. the application containing aluminum solutions in the preparation of aluminium product obtained such as the described in any item methods of claim 1-16.
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| CN107779605A (en) * | 2017-12-08 | 2018-03-09 | 欧艳 | A kind of method that aluminium is extracted in the ash from aluminium |
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| CN109365473B (en) * | 2018-10-17 | 2020-03-17 | 郑州中科新兴产业技术研究院 | Method for realizing secondary defluorination and resource utilization of aluminum ash by mixed combination method |
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