CN107539970A - A kind of production technology of industrial ammonium phosphate nutrient control - Google Patents
A kind of production technology of industrial ammonium phosphate nutrient control Download PDFInfo
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- CN107539970A CN107539970A CN201710425269.8A CN201710425269A CN107539970A CN 107539970 A CN107539970 A CN 107539970A CN 201710425269 A CN201710425269 A CN 201710425269A CN 107539970 A CN107539970 A CN 107539970A
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- ammonium phosphate
- industrial ammonium
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Abstract
A kind of production technology of industrial ammonium phosphate nutrient control：In process of production, comprehensive ore pulp quality is reduced：Phosphorus pentoxide content is 26.3%, content of magnesia 1.5%；Phosphoric acid concentration >=19.5%, SO3Concentration：0.0025‑0.0030mg/L；Part cleaner liquid after press filtration and the partial mother liquid after concentration are pressed into quality 4:1 ratio is mixed into mixed liquor, then mixed liquor is squeezed into mixed crystallization in the slurry in crystallizer tank；Control 42.5 43.5 DEG C of crystallization temperature, crystallization time 4.5 5 hours；By centrifuge sieve aperture aperture adjustment it is 0.5mm in centrifugation step.Invention advantage is：Industrial ammonium phosphate crystallization temperature is adjusted to 43 DEG C or so by 45 50 DEG C, and blends mother liquor in proportion, effectively controls the total nutrient of industrial ammonium phosphate（72.0‑72.5%）, super nutrient rate is reduced, it is final to reduce industrial ammonium phosphate production cost.
Description
Technical field
The present invention relates to the improvement of industrial production of phosphorus.
Technical background
In April, 2016, industrial ammonium phosphate was put into serial production, and passed through neutralization, settling tank, concentration, press filtration, flash distillation, filtering, crystallization etc.
Process produces industrial ammonium phosphate.Producing initial stage, total nutrient control effect is bad, and super nutrient rate remains high（More than 80%）.After although
Phase（In July, 2016）Take some measures：Reduce ore pulp content（27.7% is down to by 28.3%）；Improve phosphoric acid SO3Concentration；Return
Receipts blend mother liquor；45 DEG C or so of crystallization temperature, crystallization time about 3 hours are controlled, industrial ammonium phosphate total nutrient slightly reduces, but super
Nutrient rate is still very high, the requirement of serious non-compliance cost declining.
Produced under the process conditions, industrial ammonium phosphate total nutrient control effect is bad, and super nutrient rate is higher, adds life
Produce cost（It is shown in Table 1）.
The industrial ammonium phosphate total nutrient data statistics of table 1
The content of the invention
The purpose of the present invention is bad aiming at technique total nutrient control effect, and super nutrient rate remains high, and adds life
The deficiency of cost is produced, and a kind of production technology of industrial ammonium phosphate nutrient control is provided.
The present invention includes neutralization, settling tank, concentration, press filtration, flash distillation, crystallization, centrifugation, drying and screening step；Its feature
In production process, comprehensive ore pulp quality is being reduced：Phosphorus pentoxide content is 26.3%, content of magnesia 1.5%；Phosphoric acid is dense
Spend >=19.5%, SO3Concentration：0.0025-0.0030mg/L；Part cleaner liquid after press filtration and the partial mother liquid after concentration are pressed
Quality 4:1 ratio is mixed into mixed liquor, then mixed liquor is squeezed into mixed crystallization in the slurry in crystallizer tank；Control crystallization temperature
42.5-43.5 DEG C of degree, crystallization time 4.5-5 hours；By centrifuge sieve aperture aperture adjustment it is 0.5mm in centrifugation step.
The method have the advantages that：Industrial ammonium phosphate crystallization temperature is adjusted to 43 DEG C or so by 45-50 DEG C, and blends mother liquor in proportion, is had
The total nutrient of effect control industrial ammonium phosphate（72.0-72.5%）, super nutrient rate is reduced, it is final to reduce industrial ammonium phosphate production cost.
Embodiment
The present invention is by stablizing each production process：Neutralization, settling tank, concentration, press filtration, flash distillation, crystallization, centrifugation and drying；
In process of production, comprehensive ore pulp quality is reduced：Phosphorus pentoxide 26.3% and magnesia 1.5%；By the part filtering after press filtration
Liquid presses quality 4 with the partial mother liquid after concentration:1 ratio is mixed into mixed liquor, then the material that mixed liquor is squeezed into crystallizer tank
Mixed crystallization in slurry, mixed liquor and the pulp quality ratio about 1 in crystallizer tank:4；Effectively 43 DEG C of crystallization temperature of control, time
4.5-5 hour.
Test invention process：
First, comprehensive ore pulp quality is adjusted according to existing ore stock and ore quality, by comprehensive ore pulp quality phosphorus pentoxide
By phosphorus pentoxide 27.5%, 26.3% and magnesia 1.5% are adjusted to, dense/fineness keeps constant, investigates industrial ammonium phosphate production shape
Condition：
1）Whether industrial ammonium phosphate yield is up to standard, and continual and steady is 165 ton per days；
2）Whether industrial ammonium phosphate total nutrient can be controlled in examination scope（72.0-72.5%）Within；
3）By producting cost accounting, finally whether production cost can be reduced.
2nd, disposing mother liquor is blent
By being reclaimed in order to industrial ammonium phosphate mother liquor, and the flowmeter control disposing mother liquor amount of blending is installed additional, by mother liquor（Low product
Matter industrial ammonium phosphate crystalline solid）It is mixed into by a certain percentage in the high-quality industrial ammonium phosphate crystal separated out（In crystallizer slurry）,
By centrifuging full and uniform mixing, industrial ammonium phosphate total nutrient is effectively reduced.
3rd, reduce crystallization temperature, postpone the crystallization time of industrial ammonium phosphate crystal
Industrial ammonium phosphate crystallization temperature is adjusted to 43 DEG C or so by 45-50 DEG C, postpones the crystallization time of industrial ammonium phosphate crystal, fully will
Industrial ammonium phosphate crystal in qualified slurry separates out, the low-quality work for making the high-quality industrial ammonium phosphate crystal first separated out and separating out afterwards
Industry phosphorus ammonium crystal is sufficiently mixed, and reduces the total nutrient of industrial ammonium phosphate, effectively the super nutrient rate of control.
4th, the problem of adjusting process is brought and counter-measure
（One）The problem of adjusting process is brought
Comprehensive ore pulp quality phosphorus pentoxide is adjusted to 26.3% and magnesia 1.5% by phosphorus pentoxide 27.5%, adjustment industry
Phosphorus crystalline ammonium temperature（43 DEG C or so）And mother liquor is blent, the total nutrient of industrial ammonium phosphate is reduced, effectively the super nutrient rate of control.Adjustment
The problem of process bands are comes' major embodiment the following aspects：
1st, comprehensive ore pulp quality is reduced, if influence industrial ammonium phosphate crystallization effect and yield；
2nd, blending mother liquor causes the main content of industrial ammonium phosphate（NH4H2PO4）It is relatively low, influence to export；
3rd, after adjusting industrial ammonium phosphate crystallization temperature, whether crystalline solid becomes influences to sell greatly.
（Two）Counter-measure
1st, comprehensive ore pulp quality is reduced, if influence industrial ammonium phosphate crystallization and yield；
According to ore structures（Component）Theory, when the grade of ore is lower, impurities phase is to more in theory, free state it is elemental phosphorous
Also relative reduction, the yield of industrial ammonium phosphate filtration system, crystallization effect and industrial ammonium phosphate certainly will be influenceed.
Counter-measure：Debugged by producing as a trial, gradually reduce ore pulp content：Ore pulp content is down to 26.3% by 27.3%；Control
Phosphoric acid quality processed：Phosphoric acid concentration >=19.5% and SO3Concentration：0.0025-0.0030mg/L；Industrial ammonium phosphate production process is monitored, it is special
It is not that crystallization temperature is controlled at 43 DEG C or so, to stablize industrial ammonium phosphate yield.
2nd, disposing mother liquor, which is blent, causes the main content of industrial ammonium phosphate（NH4H2PO4）It is relatively low, influence to export；
By being reclaimed to industrial ammonium phosphate mother liquor, the low-quality industrial ammonium phosphate crystalline solid of mother liquor is mixed into Gao Pin by a certain percentage
Matter industrial ammonium phosphate crystal, if the disposing mother liquor amount of blending is bigger than normal, cause the main content of industrial ammonium phosphate（NH4H2PO4）It is relatively low（＜ 98.0%）,
Influence outlet.
Counter-measure：Effectively measured by being blent to disposing mother liquor, and sampling analysis is controlled in carrying out, monitor work in real time
Skill index, adjustment in real time, it is ensured that the main content of industrial ammonium phosphate（NH4H2PO4）Stabilization is more than 98.0%.If can not meet, outlet will
Ask, industrial ammonium phosphate total nutrient >=72.5% can be properly increased, to meet export requirement.（Remarks：The main content of industrial ammonium phosphate
（NH4H2PO4）Domestic standard >=97.0%；International standard >=98.0%）
3rd, after adjusting industrial ammonium phosphate crystallization temperature, whether crystalline solid becomes influences to sell greatly.
In the range of slurry temperature is reduced to critical-temperature, crystal starts slowly to separate out in slurry, forms fine crystals,
Though now crystal is small but very high purity, content are relatively higher.As temperature further reduces, precipitation crystal is more and more, brilliant
Body grade is increasing, and purity is also more and more lower, and total nutrient is relatively also lower.The industrial ammonium phosphate crystal now formed, by from
Packed after the heart, drying and screening.When producing water soluble fertilizer, client feedback crystal size is larger, and dissolution velocity is relative
It is slower.
Counter-measure：Counter-measure：In production process, the high-quality industrial ammonium phosphate crystal first separated out and the low product separated out afterwards
Matter industrial ammonium phosphate crystal is sufficiently mixed so that industrial ammonium phosphate finished product crystalline solid becomes big, during follow-up centrifugal drying, can incite somebody to action
Centrifuge screen-aperture 0.3mm is adjusted to 0.5mm, adjusts industrial ammonium phosphate crystal size, and installs lapping device etc. additional, meets market
Sale.
2 months 2017, phosphate fertilizer industry Co., Ltd, which passes through, in the Xin Yangfeng of Jingmen adjusted comprehensive ore pulp quality, comprehensive ore pulp cost
For 286.6 yuan/ton（Not tax included price）, 306.85 yuan/ton of ore pulp cost is integrated compared with January, 2017（Not tax included price）Reduce by 20.25
Yuan/ton, ton/ton of industrial ammonium phosphate ore pulp unit consumption about 2.68, then industrial ammonium phosphate because reduce the grade of ore, cost-effective about 54.27 yuan/
Ton, in only 2 months in 2017, reduce mineral content and save 22.43 ten thousand yuan of total amount.2 months 2017, industrial ammonium phosphate total nutrient added up
Average value is 72.24%, will produce industrial ammonium phosphate total nutrient early stage and add up average value 72.68%, and have dropped 0.44% nutrient.In original
In the case of auxiliary material fixed price, average total nutrient declines 0.44%（Single nutrient value：3500 yuan/72.0% 48.61 yuan of ≈）,
Then fertilizer per ton reduces by 21.39 yuan/ton of cost, only 2 months in 2017, and drop nutrient can obtain 8.84 ten thousand yuan of economic benefit, He Jijie
About 31.27 ten thousand yuan.
Claims (1)
- A kind of 1. production technology of industrial ammonium phosphate nutrient control：Industrial ammonium phosphate production technology includes neutralization, settling tank, concentration, pressure Filter, flash distillation, crystallization, centrifugation, dry and screening step；It is characterized in that in production process, comprehensive ore pulp quality is reduced：Five oxidations Two phosphorus contents are 26.3%, content of magnesia 1.5%；Phosphoric acid concentration >=19.5%, SO3Concentration：0.0025-0.0030mg/L；Will Part cleaner liquid after press filtration presses quality 4 with the partial mother liquid after concentration:1 ratio is mixed into mixed liquor, then mixed liquor is beaten Enter mixed crystallization in the slurry in crystallizer tank；Control 42.5-43.5 DEG C of crystallization temperature, crystallization time 4.5-5 hours；Centrifuging By centrifuge sieve aperture aperture adjustment it is 0.5mm in step.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB689751A (en) * | 1950-08-28 | 1953-04-01 | Montecatini Societa General Pe | Process for the industrial preparation of diammonium phosphate, concentrated calcium phosphates, mixed ammonium and calcium phosphates and alkaline phosphates |
| CN101367512A (en) * | 2008-09-05 | 2009-02-18 | 湖北祥云(集团)化工股份有限公司 | Process for continuous production of technical grade mano-ammonium phosphate with wet-process and phosphoric acid |
| CN102020256A (en) * | 2010-11-22 | 2011-04-20 | 马健 | Method for producing industrial and agricultural monoammonium phosphate and magnesium ammonium phosphate with wet-process phosphoric acid |
| CN103613083A (en) * | 2013-11-28 | 2014-03-05 | 贵州开磷（集团）有限责任公司 | Method for producing industrial grade monoammonium phosphate through combination of wet process phosphoric acid and high-purity phosphoric acid |
| CN106744762A (en) * | 2017-01-20 | 2017-05-31 | 昆明川金诺化工股份有限公司 | One kind with half water phosphoric acid multistage be directly produced industrial grade monoammonium phosphate method |
-
2017
- 2017-06-08 CN CN201710425269.8A patent/CN107539970A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB689751A (en) * | 1950-08-28 | 1953-04-01 | Montecatini Societa General Pe | Process for the industrial preparation of diammonium phosphate, concentrated calcium phosphates, mixed ammonium and calcium phosphates and alkaline phosphates |
| CN101367512A (en) * | 2008-09-05 | 2009-02-18 | 湖北祥云(集团)化工股份有限公司 | Process for continuous production of technical grade mano-ammonium phosphate with wet-process and phosphoric acid |
| CN102020256A (en) * | 2010-11-22 | 2011-04-20 | 马健 | Method for producing industrial and agricultural monoammonium phosphate and magnesium ammonium phosphate with wet-process phosphoric acid |
| CN103613083A (en) * | 2013-11-28 | 2014-03-05 | 贵州开磷（集团）有限责任公司 | Method for producing industrial grade monoammonium phosphate through combination of wet process phosphoric acid and high-purity phosphoric acid |
| CN106744762A (en) * | 2017-01-20 | 2017-05-31 | 昆明川金诺化工股份有限公司 | One kind with half water phosphoric acid multistage be directly produced industrial grade monoammonium phosphate method |
Non-Patent Citations (1)
| Title |
|---|
| 张思强: "料浆法磷铵二次中和生产磷酸二铵装置的工艺设计", 《磷肥与复肥》 * |
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Application publication date: 20180105 |