CN108658112A - It is a kind of with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer - Google Patents
It is a kind of with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer Download PDFInfo
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- CN108658112A CN108658112A CN201810711212.9A CN201810711212A CN108658112A CN 108658112 A CN108658112 A CN 108658112A CN 201810711212 A CN201810711212 A CN 201810711212A CN 108658112 A CN108658112 A CN 108658112A
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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
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
- C01F7/0693—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process from waste-like raw materials, e.g. fly ash or Bayer calcination dust
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/76—Preparation by contact processes
- C01B17/78—Preparation by contact processes characterised by the catalyst used
- C01B17/79—Preparation by contact processes characterised by the catalyst used containing vanadium
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- 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
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/08—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals with sodium carbonate, e.g. sinter processes
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- C—CHEMISTRY; METALLURGY
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- 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
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
- C01F7/141—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by neutralisation with an acidic agent
- C01F7/142—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by neutralisation with an acidic agent with carbon dioxide
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- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B1/04—Double-superphosphate; Triple-superphosphate; Other fertilisers based essentially on monocalcium phosphate
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- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
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Abstract
The present invention provides a kind of with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, includes the following steps：Ardealite, red mud, additive and modifying agent are mixed and ground, raw material are made, clinker is made in roasting in kiln；Clinker obtained is dissolved out, and is separated by solid-liquid separation；CO is added in isolated solution2It is no longer generated to white precipitate, white precipitate is filtered out into rear cleaning, drying and calcination, obtains aluminium oxide；Isolated residue detaches to obtain sulfide through flotation；The concentrated sulfuric acid is produced in the sulfide processing isolated；The concentrated sulfuric acid being prepared is reacted with urea, water and generates sulfuric acid urea solution；Using ureasulfuric acid ammonification, it is granulated a kind of urea-base compound fertilizer being prepared.The present invention, which has, carries aluminium and to prepare urea-base compound fertilizer at low cost, and ardealite and waste red mud residues utilization rate are high, and aluminium recovery is high, and purity is high, the high feature of urea-base compound fertilizer quality.
Description
Technical field
The present invention relates to a kind of with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, belongs to chemical metallurgy neck
Domain.
Background technology
Urea-base compound fertilizer is to react to form ureasulfuric acid with urea, water using sulfuric acid, is prepared into using ureasulfuric acid ammonification, granulation
A kind of urea-base compound fertilizer arrived.In now current fertilizer preparation process, need to consume a large amount of concentrated sulfuric acid, and the concentrated sulfuric acid is big
Mostly it is to be prepared by sulphur ore calcination, and the production technology of the concentrated sulfuric acid is complicated, causes the concentrated sulfuric acid of high cost, considerably increases
The production cost of fertilizer.
Ardealite refer in phosphoric acid production with sulfuric acid treating phosphorite when the solid slag that generates, main component is sulfuric acid
Calcium（CaSO4）, content generally can reach 70-90% or so.In addition, ardealite also contains plurality of impurities：Undecomposed phosphorus ore,
Phosphoric acid, calcirm-fluoride, iron, aluminium compound, acid non-soluble substance, organic matter of non-washes clean etc..Ardealite is discharged every year about in China
20000000 tons, add up nearly hundred million tons of discharge capacity.For utilization rate of the ardealite in terms of building materials less than 5%, a large amount of gypsum stacks occupy soil
Ground seriously pollutes environment.
Red mud is to refine the waste generated in alumina process with bauxite.It is in crimson color muddy because it is rich in iron
And it gains the name.1 ton of aluminium oxide is often produced, 1.0-2.0 tons of red mud is about generated.The year yield of China's red mud is about 1.0 hundred million tons, is tired out
It is about 500,000,000 tons to count volume of cargo in storage.
It is now currently, seldom for the technology of the comprehensive utilization of ardealite and red mud, it is substantially focused on building materials and paves the way
Traditional field, which results in the waste of a large amount of high value ingredients in ardealite and red mud, added value is very low.Although existing current
Some are ripe using the technique of red mud recycling aluminium, still, are required to add considerable amount of reactive material in these processes
It is reacted, this considerably increases cost recovery.And ardealite and red mud comprehensive utilization are extracted into recycling aluminium, while coproduction is urinated
The technique of base composite fertilizer, has not been reported.
Goal of the invention
The object of the present invention is to provide a kind of with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer.The present invention has
It carries aluminium and to prepare urea-base compound fertilizer at low cost, ardealite and waste red mud residues utilization rate are high, and aluminium recovery is high, and purity is high, urinates base
The high feature of composite fertilizer's quality.
Technical scheme of the present invention
It is a kind of with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, include the following steps：
A, ardealite, red mud, additive and modifying agent are mixed and is ground and raw material are made, be sent into roasting in kiln, clinker is made；
B, clinker made from step A is dissolved out, and is separated by solid-liquid separation；
C, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate
Drying and calcination are washed, aluminium oxide is obtained；
D, by residue isolated step B through flotation, sulfide is detached to obtain；
E, the step D sulfide isolated is placed under the oxygen-enriched environment of 30-50%, 3-5h is roasted at 800-1200 DEG C, roasted
The flue gas of generation is absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, dilutes to obtain the concentrated sulfuric acid；
F, the concentrated sulfuric acid that step E is prepared is 50-70 DEG C in temperature with urea, water and reacts generation sulfuric acid urea solution；
G, sulfuric acid urea solution is prepared in step F to mix through nozzles spray to granulation dress with the step E concentrated sulfuric acids being prepared
In setting, it is filled with base fertilizer, while the spray feed liquefied ammonia into prilling granulator in prilling granulator, at a temperature of 60-90 DEG C, is granulated
10-20 minutes, granulation formed material；
H, the material for forming step G is dry at being 90-120 DEG C in temperature, through cooling, screening, obtains granular urine base composite fertilizer
Material.
It is above-mentioned in the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, in step A, the red mud is to visit
Ear method produces the red mud that aluminium oxide generates；The additive is sodium carbonate or caustic soda；The modifying agent is anthracite, carbon or bastard coal
Stone.
It is above-mentioned in the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, in step A, in the raw material,
Ardealite and Bayer red mud are according to 1:The ratio of 0.8-2 weight ratios mixes, and additive adding proportion presses contained Na in raw material2O and
A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, the mixed proportion of modifying agent are the 10-25% of raw material total weight.
It is above-mentioned in the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, in step A, the kiln is that industry is returned
Rotary kiln, Industry Tunnel Kiln or industrial shaft kiln.
It is above-mentioned in the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, be in temperature 1000- in step A
Roasting time 1-2h at 1350 DEG C.
It is above-mentioned in the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, in step B, clinker elder generation water mill
After dissolve out；It is 4-6 that liquid when dissolution, which consolidates volume ratio,:1.
It is above-mentioned in the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, in step C, calcination is in temperature
Calcination time 2-5h at 800-1200 DEG C.
It is above-mentioned in the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, in step F, the sulfuric acid urea solution
In, the molar ratio of urea and the concentrated sulfuric acid, water is 2.3-3.8: 1: 1.
It is above-mentioned in the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, in step G, by weight, institute
It includes 2-3 parts of 10-15 parts of sulfuric acid urea solution, 3-4 parts of the concentrated sulfuric acid, 8-12 parts of base fertilizer and liquefied ammonia to state material.
It is above-mentioned in the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, by weight, the basis fertilizer
Material includes 5-10 parts of monoammonium phosphate, 5-10 parts of Diammonium phosphate (DAP), 4-8 parts of ammonium chloride, 10-15 parts of ammonium sulfate, double superhosphate 15-20
Part, 10-15 parts of calcium magnesium phosphate, 5-8 parts of potassium chloride, 8-12 parts of potassium sulfate and 1-5 parts of potassium nitrate.
The present invention is by by ardealite and red mud reaction, recombination, making utility.The net reaction of principle is：
CaSO4（Ardealite）+ Na2O·SiO2·Al2O3（Red mud）→ Na2O·Al2O3 + CaO·SiO2↓+[sulphur]
From the reaction equation it is found that with the SiO in the CaO and red mud in ardealite2Generate calcium orthosilicate（ CaO·SiO2↓）Afterwards,
Obtain soluble fabulous sodium aluminate（Na2O·Al2O3）.[sulphur] in reaction equation refers to adding modifying agent technique by raw material, raw
At metal sulfide, main component FeS；After leaching the sodium aluminate in clinker, obtained sediment flotation can be obtained
To FeS.
Advantageous effect
1, the present invention and is added after additive and modifying agent by using ardealite and red mud as raw material, in high-temperature roasting
Technique under obtain the clinker of main silicate-containing, aluminate and sulfide, and the main component of the aluminate is sodium aluminate, will
Sodium aluminate it is water-soluble go out after may be recovered aluminium, and after solid residue flotation, obtain sulfide, dense sulphur prepared using sulfide
Acid reacts to form ureasulfuric acid, urea-base compound fertilizer is prepared using ureasulfuric acid ammonification, granulation, due to whole by the concentrated sulfuric acid with urea, water
Mainly using ardealite and red mud as raw material in a technique, add other a small amount of substances, therefore, greatly reduce recycling aluminium and
Prepare the cost input of cement.Meanwhile the utilization rate of ardealite and waste red mud residues is also greatly increased, to alleviate ardealite and red
Mud has important contribution to the pollution of environment.
2, the present invention by raw material by roasting after, obtained ingredient is clearly demarcated, aluminium mainly with aluminic acid na form exist, profit
The characteristic of water is highly soluble in sodium aluminate, can be simple and quick be isolated and for extracting aluminium oxide, the rate of recovery is high, and pure
Degree is high.
3, concentrated sulfuric acid impurity produced by the present invention is few, at low cost, and the concentrated sulfuric acid reacts to form ureasulfuric acid with urea, water, utilizes
Ureasulfuric acid ammonification, granulation are prepared into urea-base compound fertilizer quality height, and urea-base compound fertilizer is at low cost.
Further to prove that the effect of the present invention, inventor have done following experiment.
1, aluminium recovery detects
To the ardealite and red mud in following five groups of embodiments, the content of ardealite and the aluminium in red mud is detected respectively, this is sent out
In bright technique, the residue after detection is separated by solid-liquid separation after having extracted and addition CO2Aluminium in the solution filtered out afterwards contains
It measures, the residue after the rate of recovery=separation of solid and liquid and addition CO2The content ÷ ardealites and red mud of aluminium in the solution filtered out afterwards
In aluminium content -1, the as rate of recovery of aluminium.Meanwhile with the traditional handicraft of the baking mixed extraction aluminium oxide of red mud and calcium oxide
As a comparison case.Experimental data is as shown in table 1：
2, urea-base compound fertilizer Quality Detection
The urea-base compound fertilizer obtained in following five groups of embodiments is detected respectively, each analysis project of urea-base compound fertilizer and analysis
Method is according to national compound fertilizer quality standard GB15063-2001；The detection of biuret uses Atomic absorption in urea-base compound fertilizer
Method.
From table 2 it can be seen that the biuret content in ureabased compound fertilizer of the present invention is low, total available nutrient (N+P2O5+K2O)
Feature high, quality is high.
Specific implementation mode
With reference to embodiment, the present invention is further illustrated, but is not intended as the foundation limited the present invention.
The embodiment of the present invention
Embodiment 1：It is a kind of with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, steps are as follows：
A, ardealite, Bayer red mud, sodium carbonate and anthracite are mixed and is ground and raw material are made, be sent into industrial rotary kiln in temperature
Clinker is made in roasting time 2h at 1000 DEG C of degree；Wherein, ardealite and Bayer red mud are according to 1:The ratio of 0.8 weight ratio mixes,
Sodium carbonate adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, anthracitic mixing ratio
Example is the 10% of raw material total weight；
B, clinker made from step A is consolidated into volume ratio as 4 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation；
C, CO is added in isolated solution2It is no longer generated to white precipitate, white precipitate is then filtered out into rear cleaning, drying
And the calcination time 5h at 800 DEG C of temperature, obtain aluminium oxide；
D, by residue isolated step B through flotation, sulfide is detached to obtain；
E, step D is isolated sulfide to be placed under 30% oxygen-enriched environment, 5h is roasted at 800 DEG C, roast the flue gas warp of generation
After vanadic anhydride catalysis reaction, is absorbed using 98% concentrated sulfuric acid, dilute to obtain 94% concentrated sulfuric acid；
F, 94% concentrated sulfuric acid that step E is prepared is 50 DEG C in temperature with urea, water and reacts generation sulfuric acid urea solution, wherein
The molar ratio of urea and the concentrated sulfuric acid, water is 2.3: 1: 1；
G, by weight, 3 parts of 94% concentrated sulfuric acid that 10 parts of sulfuric acid urea solution is prepared with step E is prepared in step F to mix
It closes through being filled with 8 parts of base fertilizer, while the spray feed liquefied ammonia into prilling granulator in nozzles spray to prilling granulator, in prilling granulator
It 2 parts, at a temperature of 60 DEG C, is granulated 10 minutes, granulation forms material；By weight, the base fertilizer includes monoammonium phosphate 5
Part, 5 parts of Diammonium phosphate (DAP), 4 parts of ammonium chloride, 10 parts of ammonium sulfate, 15 parts of double superhosphate, 10 parts of calcium magnesium phosphate, 5 parts of potassium chloride, sulphur
1 part of 8 parts of sour potassium and potassium nitrate.
H, the material for forming step G is dry at being 90 DEG C in temperature, through cooling, screening, obtains granular urine base composite fertilizer
Material.
Embodiment 2：It is a kind of with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, steps are as follows：
A, ardealite, Bayer red mud, caustic soda and carbon are mixed and is ground and raw material are made, be sent into industrial rotary kiln in temperature 1200
Clinker is made in roasting time 1.5h at DEG C；Wherein, ardealite and Bayer red mud are according to 1:The ratio of 1.2 weight ratios mixes, caustic soda
Adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:The mixed proportion of 1 addition, carbon is that raw material are total
The 15% of weight；
B, clinker made from step A is consolidated into volume ratio as 5 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation；
C, CO is added in isolated solution2It is no longer generated to white precipitate, white precipitate is then filtered out into rear cleaning, drying
And the calcination time 4h at 1000 DEG C of temperature, obtain aluminium oxide；
D, by residue isolated step B through flotation, sulfide is detached to obtain；
E, step D is isolated sulfide to be placed under 35% oxygen-enriched environment, 4h is roasted at 1000 DEG C, roast the flue gas of generation
After vanadic anhydride catalysis reaction, is absorbed using 97% concentrated sulfuric acid, dilute to obtain 93% concentrated sulfuric acid；
F, 93% concentrated sulfuric acid that step E is prepared is 55 DEG C in temperature with urea, water and reacts generation sulfuric acid urea solution, wherein
The molar ratio of urea and the concentrated sulfuric acid, water is 2.5: 1: 1；
G, by weight, 4 parts of 93% concentrated sulfuric acid that 15 parts of sulfuric acid urea solution is prepared with step E is prepared in step F to mix
It closes through being filled with 12 parts of base fertilizer, while the spray feed liquid into prilling granulator in nozzles spray to prilling granulator, in prilling granulator
3 parts of ammonia is granulated 13 minutes at a temperature of 65 DEG C, and granulation forms material；By weight, the base fertilizer includes phosphoric acid one
5 parts of ammonium, 8 parts of Diammonium phosphate (DAP), 4 parts of ammonium chloride, 15 parts of ammonium sulfate, 15 parts of double superhosphate, 15 parts of calcium magnesium phosphate, 5 parts of potassium chloride,
1 part of 12 parts of potassium sulfate and potassium nitrate.
H, the material for forming step G is dry at being 100 DEG C in temperature, through cooling, screening, obtains granular urine base composite fertilizer
Material.
Embodiment 3：It is a kind of with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, steps are as follows：
A, ardealite, Bayer red mud, sodium carbonate and gangue are mixed and is ground and raw material are made, be sent into industrial rotary kiln in temperature
Clinker is made in roasting time 1.5h at 1300 DEG C of degree；Wherein, ardealite and Bayer red mud are according to 1:The ratio of 1.5 weight ratios is mixed
It closes, sodium carbonate adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, gangue mix
Composition and division in a proportion example is the 20% of raw material total weight；
B, clinker made from step A is consolidated into volume ratio as 6 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation；
C, CO is added in isolated solution2It is no longer generated to white precipitate, white precipitate is then filtered out into rear cleaning, drying
And the calcination time 3h at 1200 DEG C of temperature, obtain aluminium oxide；
D, by residue isolated step B through flotation, sulfide is detached to obtain；
E, step D is isolated sulfide to be placed under 40% oxygen-enriched environment, 4h is roasted at 1100 DEG C, roast the flue gas of generation
After vanadic anhydride catalysis reaction, is absorbed using 98% concentrated sulfuric acid, dilute to obtain 92% concentrated sulfuric acid；
F, 92% concentrated sulfuric acid that step E is prepared is 60 DEG C in temperature with urea, water and reacts generation sulfuric acid urea solution, wherein
The molar ratio of urea and the concentrated sulfuric acid, water is 2.8: 1: 1；
G, by weight, 4 parts of 92% concentrated sulfuric acid that 10 parts of sulfuric acid urea solution is prepared with step E is prepared in step F to mix
It closes through being filled with 12 parts of base fertilizer, while the spray feed liquid into prilling granulator in nozzles spray to prilling granulator, in prilling granulator
2 parts of ammonia is granulated 15 minutes at a temperature of 70 DEG C, and granulation forms material；By weight, the base fertilizer includes phosphoric acid one
7 parts of ammonium, 8 parts of Diammonium phosphate (DAP), 5 parts of ammonium chloride, 15 parts of ammonium sulfate, 17 parts of double superhosphate, 12 parts of calcium magnesium phosphate, 5 parts of potassium chloride,
3 parts of 9 parts of potassium sulfate and potassium nitrate.
H, the material for forming step G is dry at being 110 DEG C in temperature, through cooling, screening, obtains granular urine base composite fertilizer
Material.
Embodiment 4：It is a kind of with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, steps are as follows：
A, ardealite, Bayer red mud, caustic soda and gangue are mixed and is ground and raw material are made, be sent into industrial rotary kiln in temperature
Clinker is made in roasting time 1h at 1350 DEG C；Wherein, ardealite and Bayer red mud are according to 1:The ratio of 1.8 weight ratios mixes, and burns
Alkali adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, the mixed proportion of gangue are
The 25% of raw material total weight；
B, clinker made from step A is consolidated into volume ratio as 5 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation；
C, CO is added in isolated solution2It is no longer generated to white precipitate, white precipitate is then filtered out into rear cleaning, drying
And the calcination time 4h at 1100 DEG C of temperature, obtain aluminium oxide；
D, by residue isolated step B through flotation, sulfide is detached to obtain；
E, step D is isolated sulfide to be placed under 45% oxygen-enriched environment, 4h is roasted at 1200 DEG C, roast the flue gas of generation
After vanadic anhydride catalysis reaction, is absorbed using 97% concentrated sulfuric acid, dilute to obtain 91% concentrated sulfuric acid；
F, 91% concentrated sulfuric acid that step E is prepared is 60 DEG C in temperature with urea, water and reacts generation sulfuric acid urea solution, wherein
The molar ratio of urea and the concentrated sulfuric acid, water is 3.2: 1: 1；
G, by weight, 3.5 parts of 91% concentrated sulfuric acid that 13 parts of sulfuric acid urea solution is prepared with step E is prepared in step F
Mixing is through being filled with 10 parts of base fertilizer, while the spray feed into prilling granulator in nozzles spray to prilling granulator, in prilling granulator
3 parts of liquefied ammonia is granulated 20 minutes at a temperature of 80 DEG C, and granulation forms material；By weight, the base fertilizer includes phosphoric acid
10 parts of monoammonium, 8 parts of Diammonium phosphate (DAP), 8 parts of ammonium chloride, 15 parts of ammonium sulfate, 20 parts of double superhosphate, 15 parts of calcium magnesium phosphate, potassium chloride 8
5 parts of part, 12 parts of potassium sulfate and potassium nitrate.
H, the material for forming step G is dry at being 120 DEG C in temperature, through cooling, screening, obtains granular urine base composite fertilizer
Material.
Embodiment 5：It is a kind of with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, steps are as follows：
A, ardealite, Bayer red mud, caustic soda and anthracite are mixed and is ground and raw material are made, be sent into industrial rotary kiln in temperature
Clinker is made in roasting time 2h at 1200 DEG C；Wherein, ardealite and Bayer red mud are according to 1:The ratio of 2 weight ratios mixes, caustic soda
Adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, anthracitic mixed proportion are made a living
Expect the 20% of total weight；
B, clinker made from step A is consolidated into volume ratio as 5 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation；
C, CO is added in isolated solution2It is no longer generated to white precipitate, white precipitate is then filtered out into rear cleaning, drying
And the calcination time 3h at 1100 DEG C of temperature, obtain aluminium oxide；
D, by residue isolated step B through flotation, sulfide is detached to obtain；
E, step D is isolated sulfide to be placed under 50% oxygen-enriched environment, 5h is roasted at 1100 DEG C, roast the flue gas of generation
After vanadic anhydride catalysis reaction, is absorbed using 97% concentrated sulfuric acid, dilute to obtain 94% concentrated sulfuric acid；
F, 94% concentrated sulfuric acid that step E is prepared is 60 DEG C in temperature with urea, water and reacts generation sulfuric acid urea solution, wherein
The molar ratio of urea and the concentrated sulfuric acid, water is 3.8: 1: 1；
G, by weight, 4 parts of 94% concentrated sulfuric acid that 15 parts of sulfuric acid urea solution is prepared with step E is prepared in step F to mix
It closes through being filled with 12 parts of base fertilizer, while the spray feed liquid into prilling granulator in nozzles spray to prilling granulator, in prilling granulator
3 parts of ammonia is granulated 20 minutes at a temperature of 90 DEG C, and granulation forms material；By weight, the base fertilizer includes phosphoric acid one
10 parts of ammonium, 10 parts of Diammonium phosphate (DAP), 8 parts of ammonium chloride, 15 parts of ammonium sulfate, 20 parts of double superhosphate, 15 parts of calcium magnesium phosphate, potassium chloride 8
5 parts of part, 12 parts of potassium sulfate and potassium nitrate.
H, the material for forming step G is dry at being 100 DEG C in temperature, through cooling, screening, obtains granular urine base composite fertilizer
Material.
Claims (10)
1. a kind of with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, which is characterized in that include the following steps：
A, ardealite, red mud, additive and modifying agent are mixed and is ground and raw material are made, be sent into roasting in kiln, clinker is made；
B, clinker made from step A is dissolved out, and is separated by solid-liquid separation；
C, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate
Drying and calcination are washed, aluminium oxide is obtained；
D, by residue isolated step B through flotation, sulfide is detached to obtain；
E, the step D sulfide isolated is placed under the oxygen-enriched environment of 30-50%, 3-5h is roasted at 800-1200 DEG C, roasted
The flue gas of generation is absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, dilutes to obtain the concentrated sulfuric acid；
F, the concentrated sulfuric acid that step E is prepared is 50-70 DEG C in temperature with urea, water and reacts generation sulfuric acid urea solution；
G, sulfuric acid urea solution is prepared in step F to mix through nozzles spray to granulation dress with the step E concentrated sulfuric acids being prepared
In setting, it is filled with base fertilizer, while the spray feed liquefied ammonia into prilling granulator in prilling granulator, at a temperature of 60-90 DEG C, is granulated
10-20 minutes, granulation formed material；
H, the material for forming step G is dry at being 90-120 DEG C in temperature, through cooling, screening, obtains granular urine base composite fertilizer
Material.
2. according to claim 1 with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, it is characterised in that：Step
In rapid A, the red mud is the red mud that alumina producing Bayer process generates；The additive is sodium carbonate or caustic soda；It is described to change
Property agent be anthracite, carbon or gangue.
3. according to claim 1 with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, it is characterised in that：Step
In rapid A, in the raw material, ardealite and Bayer red mud are according to 1:The ratio of 0.8-2 weight ratios mixes, additive adding proportion
By contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:The mixed proportion of 1 addition, modifying agent is raw material total weight
10-25%.
4. according to claim 1 with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, it is characterised in that：Step
In rapid A, the kiln is industrial rotary kiln, Industry Tunnel Kiln or industrial shaft kiln.
5. according to claim 1 with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, it is characterised in that：Step
It is the roasting time 1-2h at 1000-1350 DEG C of temperature in rapid A.
6. according to claim 1 with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, it is characterised in that：Step
In rapid B, dissolved out after clinker elder generation water mill；It is 4-6 that liquid when dissolution, which consolidates volume ratio,:1.
7. according to claim 1 with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, it is characterised in that：Step
In rapid C, calcination is the calcination time 2-5h at 800-1200 DEG C of temperature.
8. according to claim 1 with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, it is characterised in that：Step
In rapid F, in the sulfuric acid urea solution, the molar ratio of urea and the concentrated sulfuric acid, water is 2.3-3.8: 1: 1.
9. according to claim 1 with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, it is characterised in that：Step
In rapid G, by weight, the material includes 10-15 parts of sulfuric acid urea solution, 3-4 parts of the concentrated sulfuric acid, 8-12 parts of base fertilizer and liquid
2-3 parts of ammonia.
10. according to claim 9 with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer, it is characterised in that：
By weight, the base fertilizer includes 5-10 parts of monoammonium phosphate, 5-10 parts of Diammonium phosphate (DAP), 4-8 parts of ammonium chloride, ammonium sulfate
10-15 parts, 15-20 parts of double superhosphate, 10-15 parts of calcium magnesium phosphate, 5-8 parts of potassium chloride, 8-12 parts of potassium sulfate and potassium nitrate 1-5
Part.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109134154A (en) * | 2018-11-06 | 2019-01-04 | 中国有色桂林矿产地质研究院有限公司 | A kind of red mud silicon-calcium-potafertilizer fertilizer and preparation method thereof |
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| US3944648A (en) * | 1973-07-07 | 1976-03-16 | Aluterv Aluminiumipari Tervezo Vallalat | Method for processing bauxites |
| CN1651359A (en) * | 2004-02-06 | 2005-08-10 | 河北天人化工股份有限公司 | Production method of urocomposite fertilizer |
| CN101434403A (en) * | 2008-12-16 | 2009-05-20 | 重庆市博赛矿业（集团）有限公司 | Novel method for processing calx sodica sintered alumina by dry method |
| CN106278439A (en) * | 2015-05-18 | 2017-01-04 | 孙建和 | A kind of production method of urea-base compound fertilizer |
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2018
- 2018-07-03 CN CN201810711212.9A patent/CN108658112A/en not_active Withdrawn
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| US3944648A (en) * | 1973-07-07 | 1976-03-16 | Aluterv Aluminiumipari Tervezo Vallalat | Method for processing bauxites |
| CN1651359A (en) * | 2004-02-06 | 2005-08-10 | 河北天人化工股份有限公司 | Production method of urocomposite fertilizer |
| CN101434403A (en) * | 2008-12-16 | 2009-05-20 | 重庆市博赛矿业（集团）有限公司 | Novel method for processing calx sodica sintered alumina by dry method |
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| CN109134154A (en) * | 2018-11-06 | 2019-01-04 | 中国有色桂林矿产地质研究院有限公司 | A kind of red mud silicon-calcium-potafertilizer fertilizer and preparation method thereof |
| CN109134154B (en) * | 2018-11-06 | 2021-08-10 | 中国有色桂林矿产地质研究院有限公司 | Red mud silicon calcium potassium fertilizer and preparation method thereof |
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