CN108314584A - A method of the tailing generated using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating prepares soil conditioner - Google Patents
A method of the tailing generated using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating prepares soil conditioner Download PDFInfo
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- CN108314584A CN108314584A CN201810210850.2A CN201810210850A CN108314584A CN 108314584 A CN108314584 A CN 108314584A CN 201810210850 A CN201810210850 A CN 201810210850A CN 108314584 A CN108314584 A CN 108314584A
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- filter residue
- soil conditioner
- tailing
- ammonium nitrate
- calcium ammonium
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- C—CHEMISTRY; METALLURGY
- 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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
- C05B13/02—Fertilisers produced by pyrogenic processes from phosphatic materials from rock phosphates
-
- C—CHEMISTRY; METALLURGY
- 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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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Fertilizers (AREA)
Abstract
The present invention provides a kind of method that the tailing generated using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating prepares soil conditioner.The tailing that nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue and phosphate rock floating generate directly is prepared soil conditioner by the present invention as main component; turn waste into wealth; comprehensively utilize filter residue and the nutrient in tailing and middle trace element; realize the comprehensive utilization for the tailing that zero waste sludge discharge and phosphate rock floating generate in Phosphate Fertilizer Nitrate with Frozen Method technique; it is cost-effective, environmental protection.
Description
Technical field
The present invention relates to fertilizer fields, and in particular to a kind of to utilize nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating
The method that the tailing of generation prepares soil conditioner.
Background technology
1908, Russia scholar proposed that nitrogenous, phosphatic manure opinion can be made with decomposing phosphorite by using nitric acid.Nineteen twenty-seven, moral
Guo De methods our company first use nitric acid-phosphoric acid mixed acid decomposing phosphate rock, then to acid hydrolysate be added sylvite obtain nitrogenous, phosphorus,
Potassium integrates the fertilizer of nutrient.But because product has the problems such as very heavy smell, just stopped production less than 1 year.Nineteen twenty-eight, Norway
The method of OddaSmelt companies proposition decomposing phosphorite by using nitric acid, obtained acid hydrolysis solution freezing separates most of calcium nitrate, so
The method for being reprocessed into fertilizer afterwards.Nineteen thirty, the patent transfer Norsk Hydro companies of Norway and started to sell in 1938
Nitrophosphate fertilizer product.This is the earliest industrial practice of Phosphate Fertilizer Nitrate with Frozen Method.At the same time, nineteen thirty-seven, the Lonza companies of Switzerland
The method for proposing to manufacture nitro calcium superphosphate with 70% decomposing phosphorite by using nitric acid powder, product contain 8%N, 16%P2O5.Because containing in product
There is nitric acid hydrate of calcium and there is extremely strong hygroscopicity, in addition product total nutrient content is low, nitrogen dioxide effusion is serious in production
The problems such as and have no popularization and application.Between 1942-1945, the Phosphate Fertilizer Production of Norsk Hydro companies is due to war, raw material
It interrupts and stops production.It resumes production after the war, when nineteen fifty, the yield of Phosphate Fertilizer Nitrate with Frozen Method is 40,000 tons/year.Or so nineteen fifty, moral
The freezing of oneself is all developed in some chemical plant of BASF AG of state, the Dutch State Mines of Holland and France in succession
Method and mixed acid process nitrophosphate fertilizer technology.Because the technical foundation of most companies is directed to the Odda techniques of freezing deliming, therefore, freezing
Method nitrophosphate fertilizer is referred to as Odda methods by fertilizer circle.
The nitric acid decomposed solution of phosphorus ore is cooled to -5~10 DEG C, 60~85% Ca (NO by Phosphate Fertilizer Nitrate with Frozen Method3)2·
4H2O is precipitated in crystalline form, and the mother liquor after separation is neutralized with ammonia.Reaction equation is：6H3PO4+4Ca(NO3)2+2HF+11NH3→
3CaHPO4+3NH4H2PO4+8NH4NO3+CaF2；Neutralize slip is through evaporation, granulation, drying and sieves up to nitrophosphate fertilizer product.
After four water object of the calcium nitrate addition ammonium nitrate separated, it can be further processed into calcium ammonium nitrate fertilizer, consisting of 5Ca
(NO3)2·NH4NO3·10H2O contains N 15.5%.Freezing produces nitrophosphate fertilizer and using Ca (NO3)2·4H2The crystallization of O
When body prepares calcium ammonium nitrate fertilizer, the insoluble matter filter residue of generation is not handled timely, wherein containing certain nutrient and
Middle trace element, is not utilized also well at present.
China's phosphorus ore is based on mid low grade phosphate rock, in order to meet quality requirement of the phosphoric acid by wet process to raw ore, at present
The phosphorus concentrate for being suitble to production phosphoric acid is mainly obtained by various technique of preparing, often produces 1 ton of phosphorus concentrate, will generate 0.44 ton of tail
Mine will generate 7,000,000 tons or more of phosphorite tailings every year.By to phosphate ore flotation tailings main chemical compositions analysis shows flotation
P in tailing2O5Content is generally 7%-12%, and content of MgO 12%-18%, fineness 0.074mm (200 mesh) account for 90%.Phosphorus ore is floating
Select tailing due to P2O5Content is low, and objectionable impurities content is high, far can not meet the requirement of the grade of ore and quality, though in recent years
So there is the technology that some phosphate ore flotation tailings comprehensively utilize to occur, but utilization rate is not high, does not tackle the problem at its root.China's phosphorus
The comprehensive utilization ratio of mine flotation tailing is only 7% or so, since the bulk deposition of phosphate ore flotation tailings can not only occupy large area
Soil and farmland resource, expend more stockyard construction and maintenance cost；And outdoor storage, for a long time by wind, solarization, rain
Leaching, harmful components can reduce crop yield and matter by the dielectric breakdowns ecological environment such as air, soil surface or underground water
Amount directly or indirectly influences local resident's health.
Therefore, freezing production nitrophosphate fertilizer product generate filter residue, production byproduct calcium ammonium nitrate generate filter residue with
And the tailing that phosphate rock floating generates, it is rich in a large amount of moderate-element and trace element, there is higher economic value and environmental protection
Value, is not utilized but well at present.
Invention content
It is produced using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating to solve the above problems, present invention offer is a kind of
The method that raw tailing prepares soil conditioner.
A kind of tailing using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating generation prepares soil conditioner
Method includes the following steps：
S1. by the nitrophosphate fertilizer filter residue generated in Phosphate Fertilizer Nitrate with Frozen Method production technology and/or calcium ammonium nitrate filter residue and phosphorus
The tailing mixture that mine flotation generates is uniform, the nitrophosphate fertilizer filter residue and/or calcium ammonium nitrate filter residue, the tail generated with phosphate rock floating
The mass ratio of mine is 0.3~1:1；Then the auxiliary agent for accounting for powder weight 5-10% is added；
S2. in calcined by rotary kiln, 850-1100 DEG C of temperature, time 20min-60min；
S3. it discharges from rotary kiln, cooling, temperature of charge is down to 35-80 DEG C；
S4. it is milled, mixture is uniformly to get the soil conditioner.
The present invention prepares soil using the tailing that nitrophosphate fertilizer filter residue and/or calcium ammonium nitrate filter residue and phosphate rock floating generate
The method of conditioner can not only evaporate the moisture in waste residue, but also can make to give up by controlling calcined by rotary kiln temperature and time
The maximum reservation of nutrient in slag.The tailing that the present invention generates nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue and phosphate rock floating is made
Main component prepares soil conditioner, turns waste into wealth, environmental protection.
Preferably, the method for preparing soil conditioner, includes the following steps：
S1. the nitrophosphate fertilizer filter residue generated in Phosphate Fertilizer Nitrate with Frozen Method production technology, calcium ammonium nitrate filter residue and phosphorus ore are floated
Select the tailing mixture generated uniform, the tailing that the nitrophosphate fertilizer filter residue and/or calcium ammonium nitrate filter residue and phosphate rock floating generate
Mass ratio is 0.3-1:1, then add the auxiliary agent for accounting for powder weight 5-10%；
S2. in calcined by rotary kiln, 850-1100 DEG C of temperature, time 20min-60min；
S3. it discharges from rotary kiln, cooling, temperature of charge is down to 35-80 DEG C；
S4. it is milled, mixture is uniform；
S5. it is granulated above-mentioned mixed powder to form graininess；
S6. particle continues to be milled after drying, cooling, screening, screens out the particle of grain size 1.5-4.5mm to get described
Soil conditioner.
Preferably, 950-1100 DEG C of calcined by rotary kiln temperature described in S2, time 40min-60min.
Preferably, it discharges from rotary kiln described in S3, drop temperature is 130-200 DEG C.
Preferably, milling described in S4 uses ball mill, the mesh of gained powder particles size >=50.
Preferably, auxiliary agent described in S4 is one or more in magnesite powder, calcium magnesium phosphate, dolomite dust.
Preferably, it is granulated that mixed powder is sprayed onto in comminutor using spraying described in S5 and is granulated.
Preferably, the comminutor is one kind in rotary drum granulator, granulating disc, biaxial granulation machine.
The soil conditioner that the method for preparing soil conditioner is prepared.
The tailing that above-mentioned nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue and phosphate rock floating generate is that freezing produces nitrophosphate fertilizer
The tailing of filter residue, the filter residue that production byproduct calcium ammonium nitrate generates and phosphate rock floating generation that product generates, it is special not make
Processing.
Beneficial effects of the present invention：
The tailing that nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue and phosphate rock floating generate directly is made main component system by the present invention
Standby soil conditioner, turns waste into wealth, and comprehensively utilizes filter residue and the nutrient in tailing and middle trace element, realizes freezing nitric acid phosphorus
The comprehensive utilization for the tailing that zero waste sludge discharge and phosphate rock floating generate in fertile technique, cost-effective, environmental protection.
Description of the drawings
Fig. 1 is the preparation technology flow chart of soil conditioner.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments and specification
Attached drawing, the present invention is described in more detail, but the present invention claims protection domain be not limited to embodiment.
Embodiment 1:
A kind of tailing using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating generation prepares soil conditioner
Method includes the following steps：
S1. the tailing that the calcium ammonium nitrate filter residue and phosphate rock floating that are generated in Phosphate Fertilizer Nitrate with Frozen Method production technology generate is mixed
With tailing 25Kg uniform, that the calcium ammonium nitrate filter residue 25Kg, phosphate rock floating generate, then adds and account for the auxiliary agent that powder weighs 5%
(magnesite powder, calcium magnesium phosphate, dolomite dust mixing), mixture is uniform；
S2. in calcined by rotary kiln, 850 DEG C of temperature, time 60min；
S3. it discharges (130-200 DEG C of drop temperature) from rotary kiln, cooling, temperature of charge is down to 35 DEG C；
S4. enter ball mill milling (granular size >=50 mesh) to get soil conditioner.
In soil conditioner：PH8.5, phosphorus content (P2O5) 4.9%, content of magnesium 6.2%, calcium content 21.8%, silicone content
0.13%.
Embodiment 2:
A kind of tailing using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating generation prepares soil conditioner
Method includes the following steps：
S1. the tailing that the nitrophosphate fertilizer filter residue and phosphate rock floating that are generated in Phosphate Fertilizer Nitrate with Frozen Method production technology generate is mixed
With tailing 50Kg uniform, that the nitrophosphate fertilizer filter residue 40Kg, phosphate rock floating generate, then adds and account for the auxiliary agent that powder weighs 10%
(magnesite powder), mixture is uniform；
S2. in calcined by rotary kiln, 1000 DEG C of temperature, time 20min；
S3. it discharges (130-200 DEG C of drop temperature) from rotary kiln, cooling, temperature of charge is down to 80 DEG C；
S4. enter ball mill milling (granular size >=50 mesh) to get the soil conditioner.
In soil conditioner：PH8.6, phosphorus content (P2O5) 5.4%, content of magnesium 11.5%, calcium content 21.4%, silicone content
0.02%.
Embodiment 3:
A kind of tailing using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating generation prepares soil conditioner
Method includes the following steps：
S1. the nitrophosphate fertilizer filter residue generated in Phosphate Fertilizer Nitrate with Frozen Method production technology, calcium ammonium nitrate filter residue and phosphorus ore are floated
Select the tailing mixture generated uniform, the nitrophosphate fertilizer filter residue 10Kg, the calcium ammonium nitrate filter residue 20kg, phosphate rock floating generate
Then tailing 60Kg is added and is accounted for the auxiliary agent (calcium magnesium phosphate) that powder weighs 10%, mixture is uniform；
S2. in calcined by rotary kiln, 1100 DEG C of temperature, time 50min；
S3. it discharges (130-200 DEG C of drop temperature) from rotary kiln, cooling, temperature of charge is down to 50 DEG C；
S4. enter ball mill milling (granular size >=50 mesh) to get the soil conditioner；
S5. mixed powder described in S4 is sprayed onto using clear water in rotary drum granulator, forms graininess；
S6. particle continues to be milled after drying, cooling, screening, screens out the particle of grain size 1.5-4.5mm to get described
Soil conditioner.
In soil conditioner：PH8.5, phosphorus content (P2O5) 5.3%, content of magnesium 7.9%, calcium content 25.5%, silicone content
0.21%.
Embodiment 4:
A kind of tailing using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating generation prepares soil conditioner
Method includes the following steps：
S1. the nitrophosphate fertilizer filter residue generated in Phosphate Fertilizer Nitrate with Frozen Method production technology, calcium ammonium nitrate filter residue and phosphorus ore are floated
Select the tailing mixture generated uniform, the tailing that the nitrophosphate fertilizer filter residue 10Kg, calcium ammonium nitrate filter residue 20kg, phosphate rock floating generate
Then 40Kg is added and is accounted for the auxiliary agent (magnesite powder, calcium magnesium phosphate) that powder weighs 8%, mixture is uniform；
S2. in calcined by rotary kiln, 950 DEG C of temperature, time 60min；
S3. it discharges (130-200 DEG C of drop temperature) from rotary kiln, cooling, temperature of charge is down to 60 DEG C；
S4. enter ball mill milling (granular size >=50 mesh), mixture is uniform；
S5. mixed powder described in S4 is sprayed onto using clear water in granulating disc, forms graininess；
S6. particle continues to be milled after drying, cooling, screening, screens out the particle of grain size 1.5-4.5mm to get described
Soil conditioner.
In soil conditioner：PH8.8, phosphorus content (P2O5) 5.1%, content of magnesium 7.4%, calcium content 21.3%, silicone content
0.20%.
Embodiment 5:
A kind of tailing using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating generation prepares soil conditioner
Method includes the following steps：
S1. the nitrophosphate fertilizer filter residue generated in Phosphate Fertilizer Nitrate with Frozen Method production technology, calcium ammonium nitrate filter residue and phosphorus ore are floated
Select the tailing mixture generated uniform, the tailing that the nitrophosphate fertilizer filter residue 9Kg, calcium ammonium nitrate filter residue 9kg, phosphate rock floating generate
Then 60Kg is added and is accounted for the auxiliary agent (magnesite powder, calcium magnesium phosphate mixing) that powder weighs 8%, mixture is uniform；
S2. in calcined by rotary kiln, 1100 DEG C of temperature, time 40min；
S3. it discharges (130-200 DEG C of drop temperature) from rotary kiln, cooling, temperature of charge is down to 60 DEG C；
S4. enter ball mill milling (granular size >=50 mesh), mixture is uniform；
S5. mixed powder described in S4 is sprayed onto using clear water in rotary drum granulator, forms graininess；
S6. particle continues to be milled after drying, cooling, screening, screens out the particle of grain size 1.5-4.5mm to get described
Soil conditioner.
In soil conditioner：PH9.1, phosphorus content (P2O5) 4.7%, content of magnesium 7.7%, calcium content 21.5%, silicone content
0.22%.
Embodiment 6:
A kind of tailing using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating generation prepares soil conditioner
Method includes the following steps：
S1. the nitrophosphate fertilizer filter residue generated in Phosphate Fertilizer Nitrate with Frozen Method production technology, calcium ammonium nitrate filter residue and phosphorus ore are floated
Select the tailing mixture generated uniform, the tailing that the nitrophosphate fertilizer filter residue 30Kg, calcium ammonium nitrate filter residue 20kg, phosphate rock floating generate
Then 50Kg is added and is accounted for the auxiliary agent (magnesite powder, calcium magnesium phosphate mixing) that powder weighs 8%, mixture is uniform；
S2. in calcined by rotary kiln, 1100 DEG C of temperature, time 60min；
S3. it discharges (130-200 DEG C of drop temperature) from rotary kiln, cooling, temperature of charge is down to 60 DEG C；
S4. enter ball mill milling (granular size >=50 mesh), mixture is uniform；
S5. mixed powder described in S4 is sprayed onto using clear water in biaxial granulation machine, forms graininess；
S6. particle continues to be milled after drying, cooling, screening, screens out the particle of grain size 1.5-4.5mm to get described
Soil conditioner.
In soil conditioner：PH8.9, phosphorus content (P2O5) 5.5%, content of magnesium 7.6%, calcium content 21.7%, silicone content
0.24%.
Comparative example 1:
A kind of tailing using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating generation prepares soil conditioner
Method includes the following steps：
S1. the nitrophosphate fertilizer filter residue generated in Phosphate Fertilizer Nitrate with Frozen Method production technology, calcium ammonium nitrate filter residue and phosphorus ore are floated
Select the tailing mixture generated uniform, the tailing that the nitrophosphate fertilizer filter residue 30Kg, calcium ammonium nitrate filter residue 20kg, phosphate rock floating generate
Then 50Kg is added and is accounted for the auxiliary agent (magnesite powder, calcium magnesium phosphate mixing) that powder weighs 8%, mixture is uniform；
S2. in calcined by rotary kiln, 500 DEG C of temperature, time 60min；
S3. it discharges (130-200 DEG C of drop temperature) from rotary kiln, cooling, temperature of charge is down to 60 DEG C；
S4. enter ball mill milling (granular size >=50 mesh), mixture is uniform；
S5. mixed powder described in S4 is sprayed onto using clear water in biaxial granulation machine, forms graininess；
S6. particle continues to be milled after drying, cooling, screening, screens out the particle of grain size 1.5-4.5mm to get described
Soil conditioner.
In soil conditioner：PH7.2, phosphorus content (P2O5) 1.9%, content of magnesium 3.9%, calcium content 14.6%, silicone content
0.02%.
Comparative example 2:
A kind of tailing using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating generation prepares soil conditioner
Method includes the following steps：
S1. the nitrophosphate fertilizer filter residue generated in Phosphate Fertilizer Nitrate with Frozen Method production technology, calcium ammonium nitrate filter residue and phosphorus ore are floated
Select the tailing mixture generated uniform, the tailing that the nitrophosphate fertilizer filter residue 30Kg, calcium ammonium nitrate filter residue 20kg, phosphate rock floating generate
Then 50Kg is added and is accounted for the auxiliary agent (magnesite powder, calcium magnesium phosphate mixing) that powder weighs 8%, mixture is uniform；；
S2. in calcined by rotary kiln, 700 DEG C of temperature, time 70min；
S3. it discharges (130-200 DEG C of drop temperature) from rotary kiln, cooling, temperature of charge is down to 60 DEG C；
S4. enter ball mill milling (granular size >=50 mesh), mixture is uniform；
S5. mixed powder described in S4 is sprayed onto using clear water in biaxial granulation machine, forms graininess；
S6. particle continues to be milled after drying, cooling, screening, screens out the particle of grain size 1.5-4.5mm to get described
Soil conditioner.
In soil conditioner：PH7.5, phosphorus content (P2O5) 2.1%, content of magnesium 4.3%, calcium content 18.4%, silicone content
0.01%.
Soil conditioner function and effect
By taking citrus sapling as an example, the soil conditioner prepared with embodiment 1-6, comparative example 1, comparative example 2 goes to improve respectively
The acidity of soil, every plant of citrus sapling 0.5kg of dosage, the results are shown in Table 1.
1 soil conditioner function and effect of table
As shown in Table 1, the soil conditioner that prepared by the present invention uses one month, and acid soil pH value is obviously improved,
Young sprout slowly turns green, and tree vigo(u)r is integrally preferable；Soil conditioner prepared by comparative example 1,2 uses one month, and acid soil pH value increases
Long unobvious, young sprout difficulty turn green, and tree vigo(u)r is poor；Downward trend is presented in blank control soil pH over time, and young sprout is difficult to turn
Green, tree vigo(u)r is poor.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is changed.Therefore, the invention is not limited in specific implementation modes disclosed and described above, to the one of invention
A little modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification
Some specific terms, these terms are merely for convenience of description, does not constitute any restrictions to invention.
Claims (9)
1. a kind of tailing generated using nitrophosphate fertilizer filter residue, calcium ammonium nitrate filter residue, phosphate rock floating prepares the side of soil conditioner
Method, which is characterized in that include the following steps：
S1. the nitrophosphate fertilizer filter residue generated in Phosphate Fertilizer Nitrate with Frozen Method production technology and/or calcium ammonium nitrate filter residue and phosphorus ore is floating
Select the tailing mixture generated uniform, the nitrophosphate fertilizer filter residue and/or calcium ammonium nitrate filter residue, the tailing generated with phosphate rock floating
Mass ratio is 0.3~1:1；Then the auxiliary agent for accounting for powder weight 5-10% is added；
S2. in calcined by rotary kiln, 850-1100 DEG C of temperature, time 20min-60min；
S3. it discharges from rotary kiln, cooling, temperature of charge is down to 35-80 DEG C；
S4. it is milled, mixture is uniformly to get the soil conditioner.
2. the method according to claim 1 for preparing soil conditioner, which is characterized in that include the following steps：
S1. the nitrophosphate fertilizer filter residue generated in Phosphate Fertilizer Nitrate with Frozen Method production technology and/or calcium ammonium nitrate filter residue and phosphorus ore is floating
Select the tailing mixture generated uniform, the tailing that the nitrophosphate fertilizer filter residue and/or calcium ammonium nitrate filter residue and phosphate rock floating generate
Mass ratio is 0.3~1:1；Then the auxiliary agent for accounting for powder weight 5-10% is added；
S2. in calcined by rotary kiln, 850-1100 DEG C of temperature, time 20min-60min；
S3. it discharges from rotary kiln, cooling, temperature of charge is down to 35-80 DEG C；
S4. it is milled, mixture is uniform；
S5. it is granulated above-mentioned mixed powder to form graininess；
S6. particle continues to be milled after drying, cooling, screening, screens out the particle of grain size 1.5-4.5mm to get the soil
Conditioner.
3. the method according to claim 1 or 2 for preparing soil conditioner, which is characterized in that calcined by rotary kiln described in S2
950-1100 DEG C of temperature, time 40min-60min.
4. the method according to claim 1 or 2 for preparing soil conditioner, which is characterized in that go out from rotary kiln described in S3
Material, drop temperature are 130-200 DEG C.
5. the method according to claim 1 or 2 for preparing soil conditioner, which is characterized in that milling described in S4 uses ball
Grinding machine, the mesh of gained powder particles size >=50.
6. the method according to claim 1 or 2 for preparing soil conditioner, which is characterized in that auxiliary agent described in S4 is magnesite
It is one or more in miberal powder, calcium magnesium phosphate, dolomite dust.
7. the method according to claim 2 for preparing soil conditioner, which is characterized in that being granulated described in S5 will using spraying
Mixed powder is sprayed onto in comminutor and is granulated.
8. the method according to claim 7 for preparing soil conditioner, which is characterized in that the comminutor is drum granulating
One kind in machine, granulating disc, biaxial granulation machine.
9. the soil conditioner that the method according to claim 1 for preparing soil conditioner is prepared.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109293449A (en) * | 2018-10-17 | 2019-02-01 | 贵州芭田生态工程有限公司 | Phosphorus ore acid non-soluble substance removes and utilizes method and soil and fertilizer and soil conditioner |
| CN109627119A (en) * | 2019-01-08 | 2019-04-16 | 贵州芭田生态工程有限公司 | Phosphate Fertilizer Nitrate with Frozen Method waste residue prepares the method and soil conditioner of soil conditioner |
| CN109651019A (en) * | 2019-01-08 | 2019-04-19 | 贵州芭田生态工程有限公司 | The method that calcium ammonium nitrate waste residue prepares silico-calcium soil conditioner |
| CN112427450A (en) * | 2020-10-30 | 2021-03-02 | 中国科学院城市环境研究所 | Preparation and application of thermal modified phosphorite flotation tailing material for repairing heavy metal polluted water body and soil |
| CN114349580A (en) * | 2022-02-24 | 2022-04-15 | 天脊煤化工集团股份有限公司 | Soil conditioner prepared from nitrophosphate fertilizer by-product and granulation method thereof |
| CN115477563A (en) * | 2022-09-13 | 2022-12-16 | 葫芦岛锌业股份有限公司 | Method for preparing soil conditioner from epoxypropane saponification slag and gold dressing tailings |
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| CN109293449A (en) * | 2018-10-17 | 2019-02-01 | 贵州芭田生态工程有限公司 | Phosphorus ore acid non-soluble substance removes and utilizes method and soil and fertilizer and soil conditioner |
| CN109627119A (en) * | 2019-01-08 | 2019-04-16 | 贵州芭田生态工程有限公司 | Phosphate Fertilizer Nitrate with Frozen Method waste residue prepares the method and soil conditioner of soil conditioner |
| CN109651019A (en) * | 2019-01-08 | 2019-04-19 | 贵州芭田生态工程有限公司 | The method that calcium ammonium nitrate waste residue prepares silico-calcium soil conditioner |
| CN112427450A (en) * | 2020-10-30 | 2021-03-02 | 中国科学院城市环境研究所 | Preparation and application of thermal modified phosphorite flotation tailing material for repairing heavy metal polluted water body and soil |
| CN114349580A (en) * | 2022-02-24 | 2022-04-15 | 天脊煤化工集团股份有限公司 | Soil conditioner prepared from nitrophosphate fertilizer by-product and granulation method thereof |
| CN115477563A (en) * | 2022-09-13 | 2022-12-16 | 葫芦岛锌业股份有限公司 | Method for preparing soil conditioner from epoxypropane saponification slag and gold dressing tailings |
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