CN104261898B - A kind of improve the method for water-soluble phosphorus content in fertilizer grade calcium hydrogen phosphate - Google Patents
A kind of improve the method for water-soluble phosphorus content in fertilizer grade calcium hydrogen phosphate Download PDFInfo
- Publication number
- CN104261898B CN104261898B CN201410526347.XA CN201410526347A CN104261898B CN 104261898 B CN104261898 B CN 104261898B CN 201410526347 A CN201410526347 A CN 201410526347A CN 104261898 B CN104261898 B CN 104261898B
- Authority
- CN
- China
- Prior art keywords
- hydrogen phosphate
- calcium hydrogen
- water
- grade calcium
- soluble phosphorus
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses and a kind of improve the method for water-soluble phosphorus content in fertilizer grade calcium hydrogen phosphate, it is to be mixed homogeneously with acidic activator by fertilizer grade calcium hydrogen phosphate, stacks ripening 13 days, makes the citric acid soluble phosphorus in fertilizer grade calcium hydrogen phosphate significantly be converted into water-soluble phosphorus.Product after the inventive method processes, its water-soluble phosphorus accounts for the percentage rate of available phosphorus and is up to more than 75%, can directly use as high-quality phosphate fertilizer or for composite heat transfer raw material.High water-soluble phosphorus content is conducive to plant absorption to utilize, and can increase substantially the utilization rate of fertilizer grade calcium hydrogen phosphate, reduces the amount of application of fertilizer, and efficiently utilization and environmental conservation to phosphor resource are significant, also promote the development of phosphate industry simultaneously.
Description
Technical field
The present invention relates to a kind of phosphate fertilizer, be specifically related to that citric acid soluble phosphorus in fertilizer grade calcium hydrogen phosphate is converted into water-soluble phosphorus thus the method that improves water-soluble phosphorus content, belong to technical field of fertilizer manufacture.
Background technology
Fertilizer grade calcium hydrogen phosphate belongs to the by-product of defluorinate operation when phosphate industry produces calcium hydrophosphate fodder, and its effective phosphorus pentoxide content is between 20%-35%, and main physical and chemical index is following (%):
In prior art, the application of fertilizer grade calcium hydrogen phosphate is mainly applied to soil or the raw material as composite heat transfer using the form of phosphate fertilizer.But owing to fertilizer grade Phosphorus Contents in Calcium Hydrogen Phosphate is mainly with citric acid soluble phosphorus CaHPO4Presented in, only small part water-soluble phosphorus Ca (H2PO4)2, wherein CaHPO4Accounting is more than 90%; therefore in fertilizer grade calcium hydrogen phosphate, available phosphorus mostly is citric acid soluble phosphorus; water solublity extreme difference (100 DEG C; 0.025%); using after the most directly using or producing compound fertilizer, the most slowly, P elements utilization rate is on the low side for its fertilizer efficiency; the most gradually being abandoned by market, the usage amount of fertilizer grade calcium hydrogen phosphate die-offs and seriously governs the normal development of phosphate industry.
Summary of the invention
The purpose of the present invention is that for above-mentioned the deficiencies in the prior art, there is provided a kind of and improve the method for water-soluble phosphorus content in fertilizer grade calcium hydrogen phosphate, thus improve the P elements utilization rate of fertilizer grade calcium hydrogen phosphate, improve fertilizer efficiency, make fertilizer grade calcium hydrogen phosphate efficiently be utilized, promote the development of phosphate industry.
To achieve these goals, during the present invention improves fertilizer grade calcium hydrogen phosphate, water-soluble phosphorus content employed technical scheme comprise that such:
The present invention uses acidic activator to process fertilizer grade calcium hydrogen phosphate, is mixed homogeneously with acidic activator by fertilizer grade calcium hydrogen phosphate, and after stacking ripening 1-3 days, its citric acid soluble phosphorus is significantly converted into water-soluble phosphorus.
Further, in order to ensure activity, cost-effective, described acidic activator is selected from sulphuric acid and nitric acid.
The concentration of described acidic activator is 40%～70%.
The addition of described acidic activator is based on phosphorus pentoxide quality total in fertilizer grade calcium hydrogen phosphate 0.5-1.5 times.
Further saying, the concrete operation step of this technical scheme is as follows:
(1) fertilizer grade calcium hydrogen phosphate and acidic activator are put into mix and blend in mixer, make acid fully mix with fertilizer grade calcium hydrogen phosphate to contact, wherein mixer is the blender equipped with fly cutter, and the addition of acidic activator is based on phosphorus pentoxide quality total in fertilizer grade calcium hydrogen phosphate 0.5-1.5 times.
(2) mixed material stacks ripening 1-3 days at normal temperatures, makes material react further with acid, improves the water-soluble phosphorus content of product, and crushing packing i.e. obtains the fertilizer grade calcium monophosphate product of high level of water soluble phosphorus.
Compared with prior art, the present invention use cheap dilute sulfuric acid or dust technology be acidic activator to process cheap and that fertilizer efficiency is poor fertilizer grade calcium hydrogen phosphate, with reach to improve wherein water-soluble phosphorus content thus improve the effect of fertilizer efficiency.Its principle is in acid condition, water-fast CaHPO in fertilizer grade calcium hydrogen phosphate4With H+Reaction, can be converted into water miscible Ca (H2PO4)2, reaction equation is as follows:
2CaHPO4+2H+=Ca(H2PO4)2+Ca2+
Present inventor finds through numerous studies, and the concentration of activator (sulphuric acid or nitric acid) should be between 40%-70%, if activator concentration is too high, causes mixed process solid-to-liquid ratio excessive, is unfavorable for mix homogeneously, makes product index fluctuation big.If activator concentration is too low, activation effect will be by considerable influence, and it will be the most limited that product water soluble phosphorus content promotes amplitude, the most too low activator concentration, more moisture will be brought into, after needing additionally to carry out drying and processing, the moisture of product just can be made to arrive requirement.
The addition of activator (sulphuric acid or nitric acid) need to be adjusted based on elemental constituent situation each in fertilizer grade calcium hydrogen phosphate simultaneously, the addition controlling activator is based on phosphorus pentoxide quality total in fertilizer grade calcium hydrogen phosphate 0.5-1.5 times, and after guarantee product activates, water-soluble phosphorus accounts for the percentage rate of available phosphorus and reaches more than 75%.Activator adds too much, and product free acid content will exceed chemical industry standard requirement, adversely affect crop as Term Fertilization.Activator adds very few, and activation effect reaches bad, and it will be the most limited that product water soluble phosphorus content promotes amplitude, lose meaning of the present invention.
Activated dose processes and the material of mix homogeneously, and after need to stacking ripening 1-3 days, the water-soluble phosphorus content of product after guarantee activation is high and index is stable.Soak time is short, and added activator fails fully to react with material, and it is less that the water-soluble phosphorus content in product promotes amplitude, and the activator having neither part nor lot in reaction will be presented in free acid, and making product acid spend height can not use.Fail fully to stack simultaneously the product of activation packaged after, in fact it could happen that the natural activation process of local, cause index fluctuation and the change of product, it is difficult to product is carried out effective quality control.
After the present invention adds activator in fertilizer grade calcium hydrogen phosphate, product can reach chemical industry standard HG/T 3275-1999
Effectively phosphorus pentoxide (P2O5) requirement of content >=15%, wherein water-soluble phosphorus accounts for the percentage rate of available phosphorus and can reach more than 75%.Further, since adding activator (sulphuric acid or nitric acid) can be that product brings secondary-element sulfur or nitrate nitrogen into, the application effect of product can be improved further, increase product fertilizer efficiency.
The technique effect of the present invention: the method for water-soluble phosphorus content in raising fertilizer grade calcium hydrogen phosphate provided by the present invention, product after activated dose of process, its citric acid soluble phosphorus is significantly converted into water-soluble phosphorus, water-soluble phosphorus accounts for the percentage rate of available phosphorus and is up to more than 75%, can directly use as high-quality phosphate fertilizer or for composite heat transfer raw material.High water-soluble phosphorus content is conducive to plant absorption to utilize, and can increase substantially the utilization rate of fertilizer grade calcium hydrogen phosphate, reduces the amount of application of fertilizer, and efficiently utilization and environmental conservation to phosphor resource are significant, also promote the development of phosphate industry simultaneously.
Accompanying drawing explanation
Fig. 1 is the process chart of the inventive method.
Detailed description of the invention
In order to be more clearly understood from the purpose of the present invention, technical scheme and beneficial effect, below the present invention is described further, but not by protection scope of the present invention limit in the examples below.Following embodiment technological process is carried out with reference to Fig. 1.
Embodiment 1:
(1) activation processing of fertilizer grade calcium hydrogen phosphate:
It is 5m at volume3Mixer in, add 2 tons of fertilizer grade calcium hydrogen phosphate (available phosphorus content 32.0%, water-soluble phosphorus 2.0%), under stirring, use atomizer spray into 0.8 ton of dilute sulfuric acid (H2SO4Mass content 43%), continue stirring 20 minutes, make material mix homogeneously.
(2) maturation process:
(1) gained mixed material is placed in vacant lot and stacks ripening 1 day.
(3) crushing packing:
The material of (2) gained is broken to below 1mm through disintegrating machine, obtains product.
The fertilizer grade calcium hydrogen phosphate index prepared in embodiment 1 is as follows: available phosphorus 22.85%, water-soluble phosphorus 18.12%, water-soluble phosphorus account for the percentage rate 79.30% of available phosphorus.The present embodiment makes the citric acid soluble phosphorus in fertilizer grade calcium hydrogen phosphate 72.29% convert for water-soluble phosphorus.
Embodiment 2:
(1) activation processing of fertilizer grade calcium hydrogen phosphate:
It is 5m at volume3Mixer in, add 2 tons of fertilizer grade calcium hydrogen phosphate (available phosphorus content 32.0%, water-soluble phosphorus 2.0%), under stirring, use atomizer spray into 0.75 ton of dust technology (HNO3Mass content 55%), continue stirring 20 minutes, make material mix homogeneously.
(2) maturation process:
(1) gained mixed material is placed in vacant lot and stacks ripening 3 days.
(3) crushing packing:
The material of (2) gained is broken to below 1mm through disintegrating machine, obtains product.
The fertilizer grade calcium hydrogen phosphate index prepared in embodiment 2 is as follows: available phosphorus 23.27%, water-soluble phosphorus 17.96%, water-soluble phosphorus account for the percentage rate 77.18% of available phosphorus.The present embodiment makes the citric acid soluble phosphorus in fertilizer grade calcium hydrogen phosphate 70.95% convert for water-soluble phosphorus.
Claims (1)
1. one kind is improved the method for water-soluble phosphorus content in fertilizer grade calcium hydrogen phosphate, it is characterised in that: fertilizer grade calcium hydrogen phosphate is mixed homogeneously with acidic activator, stacks ripening 1-3 days；The concentration of described acidic activator is 40%～70%；The addition of described acidic activator is based on phosphorus pentoxide quality total in fertilizer grade calcium hydrogen phosphate 0.5-1.5 times；Described acidic activator is selected from sulphuric acid and nitric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410526347.XA CN104261898B (en) | 2014-10-09 | 2014-10-09 | A kind of improve the method for water-soluble phosphorus content in fertilizer grade calcium hydrogen phosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410526347.XA CN104261898B (en) | 2014-10-09 | 2014-10-09 | A kind of improve the method for water-soluble phosphorus content in fertilizer grade calcium hydrogen phosphate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104261898A CN104261898A (en) | 2015-01-07 |
| CN104261898B true CN104261898B (en) | 2016-09-28 |
Family
ID=52153520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410526347.XA Active CN104261898B (en) | 2014-10-09 | 2014-10-09 | A kind of improve the method for water-soluble phosphorus content in fertilizer grade calcium hydrogen phosphate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104261898B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417515A (en) * | 2015-11-19 | 2016-03-23 | 昆明川金诺化工股份有限公司 | Co-production method of feed-grade calcium phosphate dibasic and fertilizer-grade monoammonium phosphate |
| CN106219505B (en) * | 2016-08-15 | 2018-05-18 | 四川蓥峰实业有限公司 | A kind of method that Chinese holly Soluble phosphorus is converted into water-soluble phosphorus |
| CN107573105A (en) * | 2017-09-07 | 2018-01-12 | 龙蟒大地农业有限公司 | A kind of calcium superphosphate product and the method using phosphorous by-product production calcium superphosphate product |
| CN111892447A (en) * | 2020-07-31 | 2020-11-06 | 天宝动物营养科技股份有限公司 | Preparation process of calcium phosphate-rich |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456547A (en) * | 2008-12-19 | 2009-06-17 | 深圳市危险废物处理站有限公司 | Comprehensive utilization method of chemical polishing waste phosphoric acid |
| CN102030321A (en) * | 2010-12-07 | 2011-04-27 | 昆明川金诺化工有限公司 | Method for producing fertilizer with high feedstuff-fertilizer ratio by utilizing low-grade phosphate ores |
| CN102765986A (en) * | 2012-06-29 | 2012-11-07 | 安徽蒙特尔肥业有限公司 | Organic calcium phosphate fertilizer and preparation method thereof |
| CN103964921A (en) * | 2014-05-05 | 2014-08-06 | 云南富民瑞呈饲料添加剂有限公司 | Modified white fertilizer and preparing method thereof |
-
2014
- 2014-10-09 CN CN201410526347.XA patent/CN104261898B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456547A (en) * | 2008-12-19 | 2009-06-17 | 深圳市危险废物处理站有限公司 | Comprehensive utilization method of chemical polishing waste phosphoric acid |
| CN102030321A (en) * | 2010-12-07 | 2011-04-27 | 昆明川金诺化工有限公司 | Method for producing fertilizer with high feedstuff-fertilizer ratio by utilizing low-grade phosphate ores |
| CN102765986A (en) * | 2012-06-29 | 2012-11-07 | 安徽蒙特尔肥业有限公司 | Organic calcium phosphate fertilizer and preparation method thereof |
| CN103964921A (en) * | 2014-05-05 | 2014-08-06 | 云南富民瑞呈饲料添加剂有限公司 | Modified white fertilizer and preparing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104261898A (en) | 2015-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104261898B (en) | A kind of improve the method for water-soluble phosphorus content in fertilizer grade calcium hydrogen phosphate | |
| CN102674965B (en) | Manganese residue compound fertilizer and preparation method thereof | |
| CN106365747A (en) | Method for directly producing compound fertilizer by using phosphate tailings | |
| CN101724403A (en) | Multifunction soil conditioner and preparation method thereof | |
| CN102584385A (en) | Preparation method of anti-aging, long-acting and multifunctional phosphate fertilizer | |
| CN103964921A (en) | Modified white fertilizer and preparing method thereof | |
| CN103772016A (en) | Special organic-inorganic compound fertilizer for young tea trees and preparation method thereof | |
| CN102674970A (en) | Method for preparing water-soluble humic acid nitrogen and potassium fertilizer by using lignite | |
| CN104016307A (en) | Comprehensive utilization method for wet phosphoric acid dregs | |
| CN102174327A (en) | Method for producing solid water-soluble humic acid by using natural material | |
| CN104446673A (en) | Method for producing calcium superphosphate by using phosphate rock tailings | |
| CN106380231A (en) | Method for producing calcium superphosphate with phosphate rock tailings and phosphoric acid sludge | |
| CN109593003A (en) | A kind of production method improving the water-soluble phosphorus content of citrate acid soluble phosphatic fertilizer | |
| CN105693436A (en) | Zeolite controlled release nitrogenous fertilizer preparation technology | |
| CN102127450A (en) | Method for producing water-soluble humic acid from ammonium bicarbonate-ammonium oxalate | |
| CN104355681A (en) | Method for producing triple superphosphate by employing fertilizer-grade dicalcium phosphate as raw material | |
| CN104892396B (en) | Preparation method of ammonia zinc citrate | |
| CN104045487A (en) | Environmental-protection composite coated fertilizer containing phosphogypsum and preparation method thereof | |
| CN107746323A (en) | A kind of MAP anticaking agent method of slurry process generation | |
| CN104003823A (en) | Method for producing nutritional-type acidic soil conditioner from low-grade phosphate ores | |
| CN105384539A (en) | Composite efficient vegetable foliar fertilizer preparation method | |
| CN106278402A (en) | A kind of weathered coal biodegrading process | |
| CN105384540A (en) | Composite efficient vegetable foliar fertilizer | |
| CN102584401B (en) | Compound fertilizer and preparation method thereof | |
| 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 | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |