CN102757273A - Production method of high-concentration phosphorus-potassium binary compound fertilizer - Google Patents
Production method of high-concentration phosphorus-potassium binary compound fertilizer Download PDFInfo
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- CN102757273A CN102757273A CN2012102115937A CN201210211593A CN102757273A CN 102757273 A CN102757273 A CN 102757273A CN 2012102115937 A CN2012102115937 A CN 2012102115937A CN 201210211593 A CN201210211593 A CN 201210211593A CN 102757273 A CN102757273 A CN 102757273A
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Abstract
A production method of a high-concentration phosphorus-potassium binary compound fertilizer belongs to the technical field of production process of a compound fertilizer. The production method is as follows: the continuous conversion preparation and atomization drying technology of triple superphophate is combined with guniting granulation technology of raw materials set by a formula to prepare high-concentration phosphorus-potassium compound fertilizer. The quality of the compound fertilizer is stable, and the compound fertilizer contains various trace elements such as Ca, S, Mg, Al, Fe and the like needed by crops, is stable in property, low in cost and suitable for large-scale production, and does not contain any anti-blocking agent and any harmful content.
Description
Technical field
The present invention relates to the production technique of high concentration phosphorus potassium binary compound fertilizer, belong to the compound fertilizer production technology technical field.
Background technology
The phosphorus potash fertilizer of prior art is to be broken into breeze with containing phosphorus potassium ore, handles through enrichment, high-temperature sterilization, is equipped with multiple auxiliary material, after batching, in reactor drum, reacts the back granulation.Owing to influenced by processing condition, this method can only be produced and contained P
2O5-K
2The phosphorus potash fertilizer of O total nutrient about 20%.High concentration phosphorus potash fertilizer is a blank on market.
For satisfying the demand of market to high concentration phosphorus potash fertilizer, my company attempts adopting loose shape double superhosphate, Repone K and sticker mixed granulation process.Though granulation process is simple; But can not finely dispersed characteristic during the granulation of shape double superhosphate owing to loose; Product property is unstable; The production control difficulty is big, yields poorly, and the high concentration phosphorus potassium binary compound fertilizer product stability of therefore producing with this method is poor, the uniform particles degree is poor and production cost is higher.
Summary of the invention
The present invention provides a kind of working method of high concentration phosphorus potassium binary compound fertilizer just in order to overcome above-mentioned deficiency, has overcome the diffusing existing shortcoming of shape double superhosphate working method of direct utilization.Main innovation is conversion continuously, spray granulating and atomization drying technology are combined, and the product phosphorus potassium total concn of using fused(calcium magnesium)phosphate displacement sticker that the present invention is produced in the granulation process reaches the high-concentration compound fertilizer standard, realizes the object of the invention.Specifically be to implement like this: high concentration phosphorus potassium binary compound fertilizer working method is characterized in that described working method comprises the following steps:
(1) with SPA and ground phosphate rock by the required sour ore deposit ratio of reaction, add continuous conversion reaction system, transform 11-20 hour continuously down at temperature 90-115 ℃, obtain the coarse whiting slip;
(2) the coarse whiting slip that according to formula rate and system's thermal load situation step (1) is made is sent into granulation of spray granulating kiln and atomizing drier spraying drying; The spray granulating kiln is sent in the Repone K of the required ratio of filling a prescription, fused(calcium magnesium)phosphate, general calcium and system's returning charge simultaneously and the coarse whiting slip send dry kiln dry behind the spray granulating in the lump;
(3) after being sieved, cool off, pack, the work in-process of step (2) gained obtain finished product.
The optimal reaction temperature that step is gathered control in (1) is 90-115 ℃ (being guaranteed by heating and heat-insulating device), can guarantee speed of response faster, suppresses side reaction speed simultaneously, and the reaction formula of above-mentioned reaction is:
It is the coarse whiting slip of staple that reaction obtains with the monocalcium phosphate that contains crystal water, and the tail gas that reaction simultaneously produces discharges after washing, and the tail gas suction send phosphoric acid plant Sodium Silicofluoride 98min recovery system to reclaim fluorine.
In the step (2); According to required production kind and composite fertilizer GB GB15063-2009 requirement; Calculate the ratio of Repone K, general calcium and fused(calcium magnesium)phosphate and the prepared coarse whiting slip of step (1), the Repone K, general calcium and the fused(calcium magnesium)phosphate that calculate gained are sent into the tablets press granulation through metering.To calculate gained coarse whiting slip total amount and divide two portions with the under meter metering and according to granulation situation and system's thermal load situation, a part of slip adds tablets press provides material balling-up condition to carry out spray granulating, and system's returning charge, powder raw material are caused homogeneous granules; Another part slip is sent into atomisation device atomizing back and is got into dry kiln, becomes small-particle with the direct contact drying of hot blast.
Step (3) with the small-particle of material after the granulation and atomization drying after the dry kiln drying; Send the screening of back system; Macroparticle is sent into tablets press with undersized small-particle as returning charge after fragmentation; Qualified particle is the finished product of the present invention after cooling, screening, packing, the defective particle after the screening is also sent into tablets press as returning charge for the second time.
Atomization drying kiln of the present invention adopts the atomization drying technology, and control dry kiln hot blast wind pushing temperature and atomizing drier slip flow velocity.Dry kiln is sent into hot blast temperature and generally is controlled at 500-700 ℃; Hot blast temperature is lower than 500 ℃; The slip that is atomized can not wink-dry before the whereabouts and is bonded on the material lifting flights of dry kiln and causes kiln volume material; Hot blast temperature is higher than 700 ℃, and the slip wink-dry that is atomized excessively causes degenerate useful phosphorus; In order to make the dried particle of slurry atomization satisfy manufacturing technique requirent, spraying gun outlet slip flow velocity need be controlled at the 4-6 meter per second.
Production technique of the present invention and product characteristic are: adopt the atomization drying technology, improve the heat utilization efficiency of coal, the monophyly production capacity improves, and reduces manufacturing cost; Adopt spray granulation; Particle density and homogeneity are protected, and product property is stable, under the situation of not using any anti-hard caking agent; Product of the present invention is piled height for a long time and is deposited and do not lump, and has not only reduced anti-hard caking agent cost input but also reduced the pollution of anti-hard caking agent to environment; Reasonably granulation process design; Replace sticker with fused(calcium magnesium)phosphate; The product phosphorus potassium total concn that the present invention is produced reaches the high-concentration compound fertilizer standard; Simultaneously contain the required various trace elements such as moderate-element Ca, S, Mg, Al and Fe of crop again, not only improved the fertilizer efficiency of product but also reduced material cost.The high concentration phosphorus potassium binary compound fertilizer that adopts the present invention to produce is than the decline per ton of general working method production cost more than 150 yuan.The high concentration phosphorus potassium binary compound fertilizer that the present invention produces can be widely used in the fertile preparation of high density BB and directly be used for the fertilising of farm crop.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Embodiment 1, PK phosphorus potash fertilizer 20-25
Composition of raw materials (weight percent): SPA (P
2O
540%) 39%
Ground phosphate rock (P
2O
528%) 13%
Repone K (K
2O 60%) 42%
Fused(calcium magnesium)phosphate (P
2O
512%) 6%
General calcium (P
2O
512%) 12%
Working method is following:
(1) SPA and ground phosphate rock are pressed the required sour ore deposit ratio of reaction; Add continuous conversion reaction system; Transform 11-20 hour continuously down temperature 90-115 ℃ (reaction is the subregion reaction, and about 90 ℃-95 ℃ in a district, two to four districts are about 110 ℃-115 ℃), obtain the coarse whiting slip; The tail gas that reaction produces discharges after washing, and the tail gas suction send phosphoric acid plant Sodium Silicofluoride 98min recovery system to reclaim fluorine.
(2) the coarse whiting slip that according to formula rate step (1) is made is sent into granulation of spray granulating kiln and atomizing drier spraying drying; The spray granulating kiln is sent in the Repone K of the required ratio of filling a prescription, fused(calcium magnesium)phosphate, general calcium and system's returning charge simultaneously and the coarse whiting slip send the atomization drying kiln drying dry behind the spray granulating in the lump; The hot blast wind pushing temperature of atomizing drier is 500-700 ℃, and atomizing drier outlet pulp flow speed control is built in the 4-6 meter per second;
(3) after being sieved, cool off, pack, the work in-process of step (2) gained obtain finished product.Wherein macroparticle is sent into tablets press with undersized small-particle as returning charge after fragmentation, and qualified particle is the finished product of the present invention after cooling, screening, packing, and the defective particle after the screening is also sent into tablets press as returning charge for the second time.
Actual production quality index: total phosphorus (P
2O
5)>=20.5% available phosphorus (P
2O
5)>=20.2%
Water-soluble phosphorus (P
2O
5)>=15.5% K
2O>=25.2%
Free acid≤0.5% moisture≤1.8%
Granularity 2-4mm >=98% is through intensity >=40N.
Embodiment 2, high concentration phosphorus potash fertilizer prescription: PK phosphorus potash fertilizer 20-28
Composition of raw materials (weight percent): SPA (P
2O
540%) 40%
Ground phosphate rock (P
2O
528%) 13%
Repone K (K
2O 60%) 47%
Fused(calcium magnesium)phosphate (P
2O
512%) 6%
General calcium (P
2O
512%) 4%
Concrete working method reference implementation example 1.
Actual production quality index: total phosphorus (P
2O
5)>=20.5% available phosphorus (P
2O
5)>=20.2%
Water-soluble phosphorus (P
2O
5)>=15.5% K
2O>=28.2%
Free acid≤0.5% moisture≤1.8%
Granularity 2-4mm >=98% is through intensity >=40N.
Annotate: utilize Technology of the present invention, in conjunction with general calcium production characteristics, the phosphorus potassium binary compound fertilizer of lower concentration all belongs to protection domain of the present invention in the also extensible exploitation.
Claims (5)
1. high concentration phosphorus potassium binary compound fertilizer working method is characterized in that described working method comprises the following steps:
(1) with SPA and ground phosphate rock by the required sour ore deposit ratio of reaction, add continuous conversion reaction system, transform 11-20 hour continuously down at temperature 90-115 ℃, obtain the coarse whiting slip;
(2) the coarse whiting slip that according to formula rate and system's thermal load situation step (1) is made is sent into granulation of spray granulating kiln and atomizing drier spraying drying; The spray granulating kiln is sent in the Repone K of the required ratio of filling a prescription, fused(calcium magnesium)phosphate, general calcium and system's returning charge simultaneously and the coarse whiting slip send dry kiln dry behind the spray granulating in the lump;
(3) after being sieved, cool off, pack, the work in-process of step (2) gained obtain finished product.
2. working method according to claim 1 is characterized in that going on foot the tail gas that gathers (1) reaction generation and after washing, discharges, and the tail gas suction send phosphoric acid plant Sodium Silicofluoride 98min recovery system to reclaim fluorine.
3. working method according to claim 1 is characterized in that the hot blast wind pushing temperature of atomizing drier in the step (2) is 500-700 ℃.
4. according to claim 1 or 3 described working methods, it is characterized in that atomizing drier outlet pulp flow speed control is built in the 4-6 meter per second in the step (2).
5. working method according to claim 1; It is characterized in that macroparticle is sent into tablets press with undersized small-particle as returning charge in the step (3) after fragmentation; Qualified particle is the finished product of the present invention after cooling, screening, packing, the defective particle after the screening is also sent into tablets press as returning charge for the second time.
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|---|---|---|---|
| CN2012102115937A CN102757273A (en) | 2012-06-26 | 2012-06-26 | Production method of high-concentration phosphorus-potassium binary compound fertilizer |
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|---|---|---|---|
| CN2012102115937A CN102757273A (en) | 2012-06-26 | 2012-06-26 | Production method of high-concentration phosphorus-potassium binary compound fertilizer |
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ID=47051958
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307921A (en) * | 2021-12-15 | 2022-04-12 | 防城港盛农磷化有限公司 | Device and method for controlling slurry fluidity and curing efficiency |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5738387A (en) * | 1980-08-18 | 1982-03-03 | Hitachi Shipbuilding Eng Co | Manufacture of triple superphosphate |
| CN1040189A (en) * | 1989-03-30 | 1990-03-07 | 王长山 | Compound fertilizer by spray granulating and manufacture method |
| CN1651354A (en) * | 2004-02-06 | 2005-08-10 | 河北天人化工股份有限公司 | Preparation method of nitrogen phosphorus or nitrogen phosphorus potassium composite fertilizer |
| CN101734950A (en) * | 2009-12-23 | 2010-06-16 | 瓮福（集团）有限责任公司 | Method for producing ammoniated triple superphosphate |
-
2012
- 2012-06-26 CN CN2012102115937A patent/CN102757273A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5738387A (en) * | 1980-08-18 | 1982-03-03 | Hitachi Shipbuilding Eng Co | Manufacture of triple superphosphate |
| CN1040189A (en) * | 1989-03-30 | 1990-03-07 | 王长山 | Compound fertilizer by spray granulating and manufacture method |
| CN1651354A (en) * | 2004-02-06 | 2005-08-10 | 河北天人化工股份有限公司 | Preparation method of nitrogen phosphorus or nitrogen phosphorus potassium composite fertilizer |
| CN101734950A (en) * | 2009-12-23 | 2010-06-16 | 瓮福（集团）有限责任公司 | Method for producing ammoniated triple superphosphate |
Non-Patent Citations (4)
| Title |
|---|
| 唐国昌，等: "复混肥料用重钙作磷源的技术研究", 《土壤肥料》 * |
| 李兴林: "料浆法制重钙及重钙改性试验研究", 《昆明理工大学硕士论文》 * |
| 李惠跃，等: "尿素－重钙－氯化钾系复混肥料实验室研究", 《化肥工业》 * |
| 李惠跃，等: "重过磷酸钙的生产和应用", 《化肥工业》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307921A (en) * | 2021-12-15 | 2022-04-12 | 防城港盛农磷化有限公司 | Device and method for controlling slurry fluidity and curing efficiency |
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Application publication date: 20121031 |