CN104803736A - Technological method for steam-free compound fertilizer production - Google Patents
Technological method for steam-free compound fertilizer production Download PDFInfo
- Publication number
- CN104803736A CN104803736A CN201510217856.9A CN201510217856A CN104803736A CN 104803736 A CN104803736 A CN 104803736A CN 201510217856 A CN201510217856 A CN 201510217856A CN 104803736 A CN104803736 A CN 104803736A
- Authority
- CN
- China
- Prior art keywords
- production
- fertilizer
- processing method
- steam
- mixed solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Fertilizers (AREA)
Abstract
The invention discloses a technological method for steam-free compound fertilizer production. The technological method comprises the following steps: firstly, mixing part of urea with concentrated sulfuric acid to form adduct; metering water according to a proportion and then adding the water into the adduct; neutralizing the mixture with a pH value regulator, so as to finally obtain the mixed liquid slurry; uniformly spraying the obtained mixed liquid slurry through a metering pump under the action of a nozzle into a pelletizer filled with a nitrogen, phosphorous and potassium-containing basic fertilizer, further performing reaction, and pelletizing together with the basic fertilizer to form a particle material; drying, cooling and screening the obtained material to obtain the particulate compound fertilizer. The production process disclosed by the invention reduces the environment pollution, greatly reduces the production cost, further conforms to the state industrial policy, and is particularly suitable for technology upgrading and reconstruction of the pelletizer for a steam aggregating method and an ammonia-acid process in small and middle compound fertilizer manufacturing enterprises.
Description
Technical field
The present invention relates to a kind of production method of compound manure, be specifically related to a kind of processing method without production of steam compound manure.
Background technology
At present, the production technique type that China's production of compound fertilizer adopts by it, is mainly divided into: granulating method, slurry process, blending method, flow process, scorification, dope comminution granulation, extrusion process etc.Wherein granulating method is the main production process of China's particulate state composite fertilizer, is also to adopt comparatively general a kind of production method in the world.According to the difference using granulating equipment, the technique such as disc granulation, drum granulating, two slurry mixing granulating can be divided into again.First two prilling process widely adopts in China's compound fertilizer factory is produced, but this explained hereafter high density urea-base composite fertilizer material, when particularly manufacturing the urea-base composite fertilizer material of high nitrogen ratio, granulation, drying operation elasticity are lower, operate very difficult, often make the outward appearance of product particle poor, granule strength is low, and caking phenomenon is serious.Meanwhile, producing in the process of Chemical Mixed Fertilizer with steam dram comminution granulation, also there is dust pollution question in various degree, having a strong impact on the healthy of operator and enthusiasm for labour, and then impact is produced.In order to Promoting Enterprise autonomous innovation, reduce production cost, improve the quality of products, be domesticly engaged in compound fertilizer process research and manufacturing enterprise tries to explore, to the technological transformation of original steam drum granulating production of compound fertilizer device, to develop sour method new process of production.
Sour method technique is a kind of up-to-date compound fertilizer production technology that recent year occurs.Nitrogenous source (ammonium chloride, liquefied ammonia) at a low price can being used during this explained hereafter in a large number, without the need to adding the balling-up effect that any binding agent just can reach good again, thus farthest reducing the raw materials cost of product.At present at home, the composite heat transfer enterprise in ammonia and sulfuric acid source is particularly had to obtain good application.
Although sour method has many advantages; but for there is no numerous composite heat transfer enterprises in ammonia and sulfuric acid source; particularly vast medium-sized and small enterprises; want to adopt this technique just must increase tubular reactor, tail gas generated by granulation washing device, propylhomoserin measuring apparatus on the basis of conventional vapor drum granulating, inner lining for granulator is transformed simultaneously.Will build ammonia station, sulfuric acid storage device in addition, be equipped with liquefied ammonia, sulfuric acid chemical dangerous goods transfer equipment etc., technological transformation also will by environment protection and labor safety assessment.Concerning medium-sized and small enterprises, the technological transformation of existing apparatus be completed, should spended time, increase input again and purchase production unit and solve the pollution problem of waste gas, waste water, waste residue, noise.
In view of the foregoing, applicant is by making thorough investigation and study to around all kinds of production of compound fertilizer enterprise, nearly 100 times test improves and production practical application, develops a kind of " a kind of processing method without production of steam compound manure " for medium and small production of compound fertilizer technological updating of enterprises.On the basis of conventional vapor drum granulating, do not need boiler vapour, seldom equipment can implement device full production only to increase retort, volume pump etc.Under having assigned the overall situation of banning less than 20 tons boilers in country, this invention not only meets environmental requirement, and composite fertilizer's intensity of producing is high, uniform particles, bright in color, steady quality, nutrient are sufficient, soluble.Represent another direction of compound fertilizer technology development.
Summary of the invention
The object of the invention is not need boiler vapour for vast medium-sized and small enterprises provide a kind of, there is higher turndown ratio, low returning charge, less energy-consumption, Biuret Content is low, cost is low, quality is high, the production method of entirely water-soluble composite fertilizer.
For achieving the above object, the present invention takes following technical scheme:
Without a processing method for production of steam compound manure, its step is as follows:
(1) add in retort after first urea being measured in proportion, then add mixing after being measured in proportion by the vitriol oil, formed containing H
2sO
4(NH
2)
2cO, H
2sO
42 (NH
2)
2the adducts of CO, then add in adducts after water is measured in proportion, then with pH value regulator neutralization, final obtained pH value is the mixed solution slip of 4.5-6; The amount of substance of described urea, sulfuric acid, water is than being 8-12:1-5:5-9; Temperature of reaction controls at 80-107 DEG C;
(2) react in the prilling granulator mixed solution slip of gained being evenly sprayed under the effect of nozzle the base fertilizer that nitrogenous, phosphorus, potassium are housed by volume pump, and form granule materials with the common granulation of base fertilizer; The add-on of described mixed solution slip is the 5-10% adding the total weight in kind of fertilizer; The temperature of described granulation is 50-80 DEG C; The time of described granulation is 5-15 minute;
(3) gained granule materials drying, cooling, screening, obtain granular composite fertilizer; Hot blast temperature during described drying is 60-120 DEG C.
PH value regulator in step (1) is calcium carbonate.
The total material object of fertilizer added in step (2) comprises the base fertilizer of mixed solution slip, nitrogenous, phosphorus, potassium.
Nitrogenous, phosphorus, potassium base fertilizer described in step (2) is one or more the mixture in urea, monoammonium phosphate, diammonium phosphate, ammonium chloride, ammonium sulfate, Repone K, potassium sulfate or saltpetre.
In step (2), the temperature of preferred granulation is 65-75 DEG C.
In step (1), the amount of substance of preferred urea, sulfuric acid, water is than being 10:3:7.
In step (1), the temperature of reaction of preferred urea, sulfuric acid, water, pH value regulator mixed solution is at 85-95 DEG C, and final mixed solution slip pH value is 5.
Hot blast temperature in step (3) during preferred drying is 110 DEG C.
Nitrogenous described in step (2), phosphorus, potassium base fertilizer is broken into the pulverulent material being less than 1 millimeter before adding prilling granulator.
In the present invention, the production principle of composite fertilizer is:
Urea and the vitriol oil form H
2sO
4(NH
2)
2cO and H
2sO
42 (NH
2)
2the adducts (Ddlman.L in 1934 etc.) of CO, i.e. H
2sO
4+ n (NH
2)
2cO → H
2sO
4((NH
2)
2cO)
n, in formula, n is 1 or 2.Add after being measured in proportion by water in adducts again, then add pH value regulator calcium carbonate, calcium carbonate and part adducts react generation four urea sulfate calcium and water, release carbonic acid gas, i.e. C simultaneously
acO
3+ H
2sO
4((NH
2)
2cO)
n→ C
asO
44 (NH
2)
2cO+H
2o+CO
2↑.Through above-mentioned reaction, finally obtained pH value is at the mixed solution slip of 4.5-6, and preferred pH value is 5.The main component of gained mixed solution slip is urea-sulfuric acid, four urea sulfate calcium, water.When mixed solution Pulp preparation, the amount of substance of preferred urea, sulfuric acid, water is than being 10:3:7; Temperature of reaction controls at 80-107 DEG C, preferably controls at 85-95 DEG C, and the mixed solution phosphoric acid formed is high, mobility is fine, so both ensure that the speed of reaction, in turn ensure that reaction system is carried out smoothly under safety, suitable condition, and the formation of hydrolysis of urea and biuret does not occur.
Then obtained mixed solution slip is delivered to granulating system by volume pump, slip, under the effect of nozzle, is sprayed on the bed of material equably, as binding agent reinforce the pelletizing, utilize the viscosity of urea and slip that material is wrapped up layer by layer, under the effect of machinery, form qualified particle.In granulation process, the effects such as storeroom dissolving, absorption, complexing, Intermolecular Forces, the viscosity of material is increased, the density of product and intensity improve, especially the secondary response again in material storage process and crystal formation degree of turning can be reduced, make the stable in properties of product, efflorescence and caking are less likely to occur.
Material after granulation carries out, after warm air drying, entering the operations such as follow-up screening, fragmentation, cooling, parcel, last qualified product weighing and bagging through drying machine.
The product obtained by above-mentioned all process steps has that uniform particles, intensity are high, bright in color, instant efficient, Biuret Content extremely low (< 0.3%), without insoluble sludge, the easily feature such as absorbed by crops, be specially adapted to do seed manure, comparatively safe to seed.
positive beneficial effect of the present invention
The present invention compared with prior art has the following advantages:
1, production cost is low, and fixed capital can reduce by more than 60%, and coal consumption, power consumption reduce by more than 50%.
2, boiler vapour is not needed.Under having assigned the overall situation of banning less than 20 tons boilers in country, this invention meets environmental requirement more.
3, the reaction heat utilizing urea, sulfuric acid, water, pH value conditioning agent mixed solution slip to be formed, makes solid urea form runny stable slurry body, the moisture of particIe system is reduced greatly, also can realize without dry or few drying process for some formula.
4, can realize in the present invention without stopping composition granulation, the four urea sulfate calcium simultaneously generated in mixed solution slip also solve the problem of powdery ammonium sulfate granulating difficulty in granulation process, and (four urea sulfate calcium have very strong adsorptivity, powdery ammonium sulfate granulating can be adhered to), particularly when the kind of compound manure requires to add the ammonium sulfate of more amount, effect is more obvious.The product granulation balling ratio using present invention process method to obtain reaches about 95%, and plant capacity improves 60-100%.
5, the technology of the present invention technique is simple, more easily realizes serialization automatic operation.Mixed solution slurry preparation has higher turndown ratio, easily controls.
6, Technological adaptability is strong.When this technique is produced, the critical relative humidity of particle can reach more than 60%, produces, particularly high nitrogen product even if also can realize normal continuous print at the production in summer of high temperature, high humidity, and effect is more obvious, and product nitrogen content reaches as high as 28%.
6, the side reaction generating biuret is few.Sulfuric acid, urea, water and pH value regulator hybrid reaction temperature are below 100 DEG C, and biuret generation is very low, more effectively ensures the inner quality of product.
7, product colour pure white, not by the impact of weighting agent appearance color.
8, product setting range is wide, both can produce common chloride composite fertilizer, and can produce S-based compound fertilizer again, and also can produce high nitrogen product.
9, the mixed solution slip obtained by the present invention, as binding agent reinforce the pelletizing, can utilize the viscosity of urea and slip that material is wrapped up layer by layer, under the effect of machinery, forms qualified particle.In granulation process, storeroom is by effects such as dissolving, absorption, complexing, Intermolecular Forcess, the viscosity of material is increased, the density of product and intensity improve, especially the secondary response again in material storage process and crystal formation degree of turning can be reduced, make the stable in properties of product, efflorescence and caking are less likely to occur.
10, production technique of the present invention is particularly suitable for the technology upgrading transformation of medium and small production of compound fertilizer enterprise steam agglomeration, sour method prilling granulator.
Embodiment
Below by embodiment, the present invention is set forth further, but do not mean limiting the scope of the invention.
embodiment 1without a processing method for production of steam compound manure, comprise the steps:
500 kilograms of urea (containing N46%) are first added in the retort with agitator by mixed solution Pulp preparation: the first step, then add 150 kilograms of vitriol oils (98%) and react; 350 kg of water are slowly added in retort by second step; 55 kilograms of calcium carbonate are added in retort, will keep a close eye on the change of the temperature of retort material in the process by the 3rd step, by cooling circulating water, temperature of reaction is controlled at 85-95 DEG C, through about 10 minutes, react complete, generate the mixed solution slip that the somewhat pale red pH value of clarification is about 5.
Powder ammonium phosphate is added (containing N 11%, P in tablets press
2o
544%) 341 kilograms, Repone K is (containing K
2o 60%) 250 kilograms, dry ammonium chloride (containing N 25%) 350 kilograms, open the mixed solution slip 100 kilogram of nozzle to the above-mentioned preparation of spray feed in tablets press.
Through granulation in about 6 minutes, prilling temperature 75 DEG C, the moisture that granulation material goes out tablets press mouth was about 1.6%, and balling ratio reaches more than 96%.
Material after granulation is dry in drying machine with the hot blast of 110 DEG C, and dried material, through cooling, screening, obtains the compound manure that granularity is 1-4mm.
Product analysis result: N15.05%; P
2o
514.95%; K
2o15.02%, total available nutrient (N+P
2o
5+ K
2o)=45.02%, fertilizer moisture content is 1.0%, biuret 0.17%, and intensity 30 newton, balling ratio reaches 95%.
embodiment 2
Mixed solution Pulp preparation is with embodiment 1.
Urea (containing N46%) 120 kg, powder ammonium phosphate is added (containing N 11%, P in tablets press
2o
544%) 341 kilograms, potassium sulfate is (containing K
2o 50%) 300 kilograms, 200 kilograms, ammonium sulfate (containing N 21%), open the mixed solution slip 67 kilogram of nozzle to the above-mentioned preparation of spray feed in tablets press.
Through granulation in about 5 minutes, prilling temperature 70 DEG C, the moisture that granulation material goes out tablets press mouth was about 1.5%, and balling ratio reaches more than 95%.
Material after granulation is dry in drying machine with the hot blast of 110 DEG C, and dried material, through cooling, screening, obtains the compound manure that granularity is 1-4mm.
Fertilizer product analytical results: N15.11%; P
2o
514.96%; K
2o15.03%, total available nutrient (N+P
2o
5+ K
2o)=45.10%, fertilizer moisture content is 0.9%, biuret 0.16%, and intensity 28 newton, balling ratio reaches 96%.
embodiment 3
Mixed solution Pulp preparation: with embodiment 1.
250 kilograms, urea (containing N46%), powder ammonium phosphate is added (containing N 11%, P in tablets press
2o
544%) 364 kilograms, Repone K is (containing K
2o 60%) 84 kilograms, ammonium chloride (containing N 25%) 300 kilograms, open the mixed solution slip 44 kilogram of nozzle to the above-mentioned preparation of spray feed in tablets press.
Through granulation in about 5 minutes, prilling temperature 75 DEG C, the moisture that granulation material goes out tablets press mouth was about 1.7%, and balling ratio reaches more than 95%.
Material after granulation is dry in drying machine with the hot blast of 110 DEG C, and dried material, through cooling, screening, obtains the compound manure that granularity is 1-4mm.
Fertilizer product analytical results: N24.16%; P
2o
516.03%; K
2o5.05%, total available nutrient (N+P
2o
5+ K
2o)=45.24%, fertilizer moisture content is 1.1%, biuret 0.19%, and intensity 28 newton, balling ratio reaches 97%.
embodiment 4
Mixed solution Pulp preparation: with embodiment 1.
150 kilograms, urea (containing N46%), powder ammonium phosphate is added (containing N 11%, P in tablets press
2o
544%) 341 kilograms, Repone K is (containing K
2o 60%) 168 kilograms, ammonium chloride (containing N 25%) 330 kilograms, open the mixed solution slip 50 kilogram of nozzle to the above-mentioned preparation of spray feed in tablets press.
Through granulation in about 5 minutes, prilling temperature 75 DEG C, the moisture that granulation material goes out tablets press mouth was about 1.5%, and balling ratio reaches more than 95%.
Material after granulation is dry in drying machine with the hot blast of 110 DEG C, and dried material, through cooling, screening, obtains the compound manure that granularity is 1-4mm.
Fertilizer product analytical results: N20.06%; P
2o
515.01%; K
2o10.05%, total available nutrient (N+P
2o
5+ K
2o)=45.12%, fertilizer moisture content is 0.9%, biuret 0.16%, and intensity 30 newton, balling ratio reaches 96%.
In above-described embodiment, each analysis project of compound manure and analytical procedure are according to national composite fertilizer quality standard GB15063-2009; In compound manure, the detection of biuret adopts atomic absorption method.
Claims (9)
1., without a processing method for production of steam compound manure, comprise the steps:
(1) add in retort after first urea being measured in proportion, then add mixing after being measured in proportion by the vitriol oil, formed containing H
2sO
4(NH
2)
2cO, H
2sO
42 (NH
2)
2the adducts of CO, then add in adducts after water is measured in proportion, then with pH value regulator neutralization, final obtained pH value is the mixed solution slip of 4.5-6; The amount of substance of described urea, sulfuric acid, water is than being 8-12:1-5:5-9; Temperature of reaction controls at 80-107 DEG C;
(2) react in the prilling granulator mixed solution slip of gained being evenly sprayed under the effect of nozzle the base fertilizer that nitrogenous, phosphorus, potassium are housed by volume pump, and form granule materials with the common granulation of base fertilizer; The add-on of described mixed solution slip is the 5-10% adding the total weight in kind of fertilizer; The temperature of described granulation is 50-80 DEG C; The time of described granulation is 5-15 minute;
(3) gained granule materials drying, cooling, screening, obtain granular composite fertilizer; Hot blast temperature during described drying is 60-120 DEG C.
2. a kind of processing method without production of steam compound manure as claimed in claim 1, is characterized in that: the pH value regulator in step (1) is calcium carbonate.
3. a kind of processing method without production of steam compound manure as claimed in claim 1, is characterized in that: the total material object of fertilizer added in step (2) comprises the base fertilizer of mixed solution slip, nitrogenous, phosphorus, potassium.
4. a kind of processing method without production of steam compound manure as described in any one of claim 1 or 3, is characterized in that: nitrogenous, phosphorus, potassium the base fertilizer described in step (2) is one or more the mixture in urea, monoammonium phosphate, diammonium phosphate, ammonium chloride, ammonium sulfate, Repone K, potassium sulfate or saltpetre.
5. a kind of processing method without production of steam compound manure as claimed in claim 1, is characterized in that: in step (2), the temperature of preferred granulation is 65-75 DEG C.
6. a kind of processing method without production of steam compound manure as claimed in claim 1, is characterized in that: in step (1), the amount of substance of preferred urea, sulfuric acid, water is than being 10:3:7.
7. a kind of processing method without production of steam compound manure as claimed in claim 1, is characterized in that: the temperature of reaction of the preferred urea of step (1), sulfuric acid, water, pH value regulator mixed solution is at 85-95 DEG C, and final mixed solution slip pH value is 5.
8. a kind of processing method without production of steam compound manure as claimed in claim 1, is characterized in that: the hot blast temperature in step (3) during preferred drying is 110 DEG C.
9. a kind of processing method without production of steam compound manure as claimed in claim 1, is characterized in that: nitrogenous described in step (2), phosphorus, potassium base fertilizer is broken into the pulverulent material being less than 1 millimeter before adding prilling granulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217856.9A CN104803736B (en) | 2015-05-04 | 2015-05-04 | A kind of process of no steam production compound fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217856.9A CN104803736B (en) | 2015-05-04 | 2015-05-04 | A kind of process of no steam production compound fertilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104803736A true CN104803736A (en) | 2015-07-29 |
| CN104803736B CN104803736B (en) | 2018-01-19 |
Family
ID=53688992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510217856.9A Active CN104803736B (en) | 2015-05-04 | 2015-05-04 | A kind of process of no steam production compound fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104803736B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967795A (en) * | 2016-04-27 | 2016-09-28 | 加华沃尔夫（河南）肥业有限公司 | Sulphuryl carbamide-based compound fertilizer and preparation method thereof |
| CN106220408A (en) * | 2016-07-12 | 2016-12-14 | 江苏邮储肥料有限公司 | A kind of new and effective incremental fertilizer |
| CN106747771A (en) * | 2016-11-18 | 2017-05-31 | 乔奖峰 | A kind of high-efficient granule ammonium sulfate and preparation method thereof |
| CN108440197A (en) * | 2018-05-03 | 2018-08-24 | 嘉施利（应城）化肥有限公司 | A kind of high tower humic acid type composite fertilizer |
| CN114728859A (en) * | 2019-10-03 | 2022-07-08 | 沙特基础工业全球技术公司 | Urea calcium sulfate particles and methods of making and using same |
| US11802096B2 (en) | 2017-07-21 | 2023-10-31 | Sabic Global Technologies B.V. | Calcium sulfate urea granules and methods for producing and using the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6749660B2 (en) * | 2001-06-04 | 2004-06-15 | Geovation Technologies, Inc. | Solid-chemical composition and method of preparation for the anaerobic bioremediation of environmental contaminants coupled to denitrification |
| CN102358726A (en) * | 2011-07-11 | 2012-02-22 | 熊建超 | Urea sulfate and preparation method thereof |
| CN102503634A (en) * | 2011-10-27 | 2012-06-20 | 山西师范大学 | Urea-base compound fertilizer production technique |
-
2015
- 2015-05-04 CN CN201510217856.9A patent/CN104803736B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6749660B2 (en) * | 2001-06-04 | 2004-06-15 | Geovation Technologies, Inc. | Solid-chemical composition and method of preparation for the anaerobic bioremediation of environmental contaminants coupled to denitrification |
| CN102358726A (en) * | 2011-07-11 | 2012-02-22 | 熊建超 | Urea sulfate and preparation method thereof |
| CN102503634A (en) * | 2011-10-27 | 2012-06-20 | 山西师范大学 | Urea-base compound fertilizer production technique |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967795A (en) * | 2016-04-27 | 2016-09-28 | 加华沃尔夫（河南）肥业有限公司 | Sulphuryl carbamide-based compound fertilizer and preparation method thereof |
| CN106220408A (en) * | 2016-07-12 | 2016-12-14 | 江苏邮储肥料有限公司 | A kind of new and effective incremental fertilizer |
| CN106747771A (en) * | 2016-11-18 | 2017-05-31 | 乔奖峰 | A kind of high-efficient granule ammonium sulfate and preparation method thereof |
| US11802096B2 (en) | 2017-07-21 | 2023-10-31 | Sabic Global Technologies B.V. | Calcium sulfate urea granules and methods for producing and using the same |
| US11912634B2 (en) | 2017-07-21 | 2024-02-27 | Sabic Global Technologies B.V. | Calcium sulfate urea granules and methods for producing and using the same |
| CN108440197A (en) * | 2018-05-03 | 2018-08-24 | 嘉施利（应城）化肥有限公司 | A kind of high tower humic acid type composite fertilizer |
| CN114728859A (en) * | 2019-10-03 | 2022-07-08 | 沙特基础工业全球技术公司 | Urea calcium sulfate particles and methods of making and using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104803736B (en) | 2018-01-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104803736A (en) | Technological method for steam-free compound fertilizer production | |
| CN100348550C (en) | Production method of urocomposite fertilizer | |
| CN103936524B (en) | A kind of production method of urea aldehyde slow-release compound fertilizer | |
| CN102093113B (en) | Production method of readily available and controlled release composite fertilizer containing three nitrogen elements | |
| CN102040427A (en) | Method for producing chlorine-based high phosphorus compound fertilizer by ammoniation method | |
| CN100354235C (en) | Spray pelleting process of compound fertilizer | |
| CN104355772A (en) | Preparation method and preparation device of compound fertilizer | |
| CN105646106A (en) | Humic acid type functionality organic-inorganic compound fertilizer and preparing method thereof | |
| US5078779A (en) | Binder for the granulation of fertilizers such as ammonium sulfate | |
| CN103304323A (en) | Multi-element urea-based composite fertilizer and production method thereof | |
| CN103387439A (en) | New process for producing composite fertilizer by using amino acid through slurry spraying and pelleting | |
| CN106083464A (en) | A kind of compoiste fertilizer and production technology thereof | |
| US20050144997A1 (en) | Extended-release nitrogen-containing granular fertilizer | |
| CN107935666A (en) | A kind of double ammoniation-granulation techniques | |
| CN101337847B (en) | Method for preparing high-nitrogen sulfonyl azophoska compound fertilizer | |
| CN103588543B (en) | Production method for multi-nutrient urea sulfuric acid sulfur-based composite fertilizer | |
| CN103524274B (en) | Method for producing cooling-free compound fertilizer | |
| CN106116948A (en) | A kind of compoiste fertilizer and production technology thereof | |
| CN102001872B (en) | method for producing granular potash fertilizer and product thereof | |
| CN106220278B (en) | It is a kind of improve potassium sulfate compound fertilizer granule strength additive and high-strength complex Hefei particle preparation method | |
| CN107586189A (en) | A kind of preparation method of the special damp-proof urea of Blending Fertilizer | |
| CN101343206B (en) | Process for preparing circular particle kalium based fertilizer | |
| CN106278439A (en) | A kind of production method of urea-base compound fertilizer | |
| CN105948979A (en) | Preparation method of diammonium phosphate bed soil acidity regulator | |
| CN113860971A (en) | Continuous production process of one-step method slurry-melting chelating active humic acid compound fertilizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230811 Address after: 461100 Sanhuangmiao Village, Jiangliji Town, Jian'an District, Xuchang City, Henan Province Patentee after: Xuchang Jintian wild fertilizer Co.,Ltd. Address before: 466600 north side of West Fu Road, Xihua County, Zhoukou, Henan Patentee before: Henan Shenzhou Dahua Fertilizer Industry Co.,Ltd. |