CN101891169B - Method for improving particle crystallization feel of diammonium phosphate by using aluminum ions - Google Patents
Method for improving particle crystallization feel of diammonium phosphate by using aluminum ions Download PDFInfo
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- CN101891169B CN101891169B CN2010102178439A CN201010217843A CN101891169B CN 101891169 B CN101891169 B CN 101891169B CN 2010102178439 A CN2010102178439 A CN 2010102178439A CN 201010217843 A CN201010217843 A CN 201010217843A CN 101891169 B CN101891169 B CN 101891169B
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Abstract
The invention relates to a method for improving particle crystallization feel of diammonium phosphate by using aluminum ions. A method for producing the diammonium phosphate by wet-process phosphoric acid comprises the following steps of: decomposing phosphate rock to generate a phosphoric acid; and neutralizing the phosphoric acid by using ammonia to generate the diammonium phosphate. The methodis characterized by adding aluminum in an amount which is 0 to 2.5 percent based on the weight of the phosphate rock in the process of decomposing the phosphate rock to generate the phosphoric acid, or adding the aluminum in an amount which is 0 to 1.25 percent based on the weight of the phosphoric acid into the generated phosphoric acid to ensure that the metal sesquioxide content accounts for 1.5 to 3 percent of the diammonium phosphate; and neutralizing the phosphoric acid and the ammonia to obtain the diammonium phosphate with good particle crystallization feel.
Description
Technical field
The present invention relates to chemical fertilizer color field, particularly relate to a kind of method of utilizing aluminum ion to improve particle crystallization feel of diammonium phosphate.
Background technology
China's phosphate rock resource mainly concentrates on ground such as Guizhou, Yunnan, Hubei at present, skewness, and grade has nothing in common with each other, low-grade in belong to more.Various places mineral resources composition differs bigger, and general fertilizers manufacturer makes the phosphoric grade reach required more than 29% through joining the ore deposit, seldom has enterprise to be concerned about the micronutrient levels in the fertilizer, thereby causes each manufacturing enterprise's granulation widely different.What have shows on color, and what have shows at the fertilizer particle in appearance.The outer official's of fertilizer difference has directly caused the peasant that the fertilizer quality is suspected, influence is sold.The fertiliser granulates outward appearance too, the mellow and full fertilizer that has crystal to pass through sense exceeds about 300 yuan/ton than coarse ugly fertilizer selling price.So some fertilizer producers more and more recognize this problem, set up special tackling key problem group and study, also obtained some achievements.The instability of mineral causes some micro-disappearance of fertilizer in the features of DAP production, causes granulation of fertilizer difficulty in the production, and particle is not mellow and full smooth, does not have crystallization feel, influences the fertilizer outward appearance.
Diammonium phosphate national Specification nutrient must be more than 64%, and moisture will be controlled at below 2%, remaining minority comprise some sesquioxides, non-water-soluble impurity and crystal water.Usually fertilizer moisture only comprises free-water and crystal water partly; Free-water wherein and partial crystallization water are detected in water analysis; Metallic Solids is become one in most crystal water and the fertilizer; Become the part of fertilizer, this crystal water can obviously strengthen the crystal sense of fertilizer, makes fertilizer goodlooking.Some manufacturing enterprises are in order to control nutrient, and the too much raising phosphoric acid purification load that has reduces foreign matter content (comprising sesquioxide), and it is higher to cause producing nutrient, and load, cost increase, perhaps Moisture high UCL.It is not in place that the enterprise that has opposes that mutually phosphoric acid impurity purifies, and makes that the not tolerant impurity of solid increases in the phosphoric acid, though nutrient, moisture can reach requirement, not tolerant impurity can influence granulation of fertilizer, makes that the coarse no crystal sense of granulation of fertilizer is ugly.When fertiliser prodn, add an amount of aluminium element, can bring more crystal water into, and aluminum ion can not influence viscosity, the color of phosphoric acid, fertilizer passed through sense help bigger.Also having a theory is because aluminum ion is all the ion that falls apart, and forms the space polyhedral structure easily, and xln has rigidity that transparent feel is arranged.
Summary of the invention
The object of the invention is in order to improve the crystallization feel problem of diammonium phosphate granulation; And a kind of method of utilizing aluminum ion to improve particle crystallization feel of diammonium phosphate is provided; The present invention adds the influence that deficiency that aluminium element remedies aluminium element causes the crystallization feel difference in features of DAP production; The present invention is simple and practical, has the obvious granulation of fertilizer water article that improve.
The present invention realizes through following technical scheme:
A kind of method of utilizing aluminum ion to improve particle crystallization feel of diammonium phosphate; In the method for Wet-process Phosphoric Acid Production diammonium phosphate: at first Rock Phosphate (72Min BPL) is decomposed generation phosphoric acid by sulfuric acid; Phosphoric acid by in the ammonia with generate diammonium phosphate; It is characterized in that: in Rock Phosphate (72Min BPL) is decomposed the process that generates phosphoric acid, add the aluminium element of the 0-2.5% that accounts for Rock Phosphate (72Min BPL) weight or the aluminium element that the interpolation in the phosphoric acid that has generated accounts for the 0-1.25% of phosphoric acid weight; Make in the diammonium phosphate metal sesquioxide content at 1.5%-3%, last phosphoric acid neutralizes with ammonia and obtains the good diammonium phosphate of particle crystallization feel.
The chemical substance of above-mentioned interpolation aluminium element is that the oxide compound of inorganic aluminate, aluminium is or/and the complex compound of aluminium.
The present invention adds the influence that deficiency that the chemical substance contain aluminium element remedies aluminium element causes the crystallization feel difference in the process in features of DAP production, the adding of the chemical substance through containing aluminium element improves apparent in view to diammonium phosphate granulation crystallization.
Embodiment
Embodiment 1:
The phosphorus ore source of domestic certain phosphorus ammonium manufacturing enterprise adopts Yunnan ore production diammonium phosphate DAP granulation all right from domestic several big phosphorus ore producing regions.But it is relatively poor with ore deposit, Guizhou and ore deposit, Hanyuan granulation situation.The influence of initial analysis Rock Phosphate (72Min BPL) chemical constitution and sesquioxide crystallization granulation in the laboratory.
Unit: weight percent %
| Sample ore | P 2O 5 | R 2O 3 | MgO | Remarks |
| Haikou, Yunnan phosphorus ore | 30 | 2.5-3.2 | 1.7 | Advantages of good crystallization |
| Guizhou Fuquan phosphorus ore | 30 | 1.7 | 2.0 | Crystallization is poor |
| Hanyuan, Sichuan phosphorus ore | 33 | 0.7 | 1.5 | Crystallization is the poorest |
The chemical substance that partly contains aluminium element has been added in suggestion through us in relatively poor mineral resources, regulate aluminium element content in the mineral through joining the ore deposit, and experimental result has reached more satisfactory effect, and experimental data is following:
Unit: weight percent %
| Join the ore deposit | Guizhou Fuquan phosphorus ore % | Hanyuan, Sichuan phosphorus ore % | Add aluminium element % | Crystallization feel |
| 1 | 66.45 | 33.22 | 0.33 | Good |
| 2 | 49.75 | 49.75 | 0.5 | Better |
| 3 | 79.68 | 20 | 0.32 | Good |
| 4 | 66.56 | 33.27 | 0.17 | Good |
Experimental result shows that the aluminium element that has added part improves apparent in view to the granulation of fertilizer crystallization.
Embodiment 2:
Domestic certain phosphorus ammonium enterprise has set up granulation tackling key problem group according to our suggestion, through a large amount of empiric observation, finds that the granulation of partial impurities pair ion diammonium phosphate is helpful.Draw as drawing a conclusion:
(1) diammonium phosphate that obtains with pure phosphoric acid neutralization is colourless crystal, is white powder after the drying;
(2) the diammonium phosphate granulation that obtains of Yun Nankuang is better, and crystallization feel is strong, and the ore deposit, Guizhou is poor slightly; The granulation in ore deposit, Hanyuan is the poorest;
(3) in the phosphoric acid extraction operation, replenish a part of aluminium element after, relatively poor granulation all makes moderate progress.It is more obvious that effect is improved in the ore deposit, Hanyuan.
(4) behind the additional aluminium element, the slip color is not changed, but viscosity or denseness no abnormality seen.
To sum up, explain increase aluminum ion after, the granulation situation is had some improvement.
Embodiment 3:
Domestic certain phosphorus ammonium manufacturing enterprise, through tracking and the record to ammonium phosphate product crystallization feel situation in 2008, corresponding phosphoric acid impurity is formed as follows when statistics diammonium phosphate crystallization feel is strong:
| Date | The impurity index | MgO content | Al 2O 3Content |
| The 27-4 month in March 21 | 0.1173 | 0.83 | 1.79 |
| 28-May 30 April | 0.1161 | 0.78 | 2.08 |
| June | 0.1076 | 0.65 | 2.02 |
| July | 0.1044 | 0.77 | 1.77 |
| 1-August 16 August | 0.1146 | 0.83 | 2.08 |
| 31-September 16 August | 0.09426 | 0.61 | 1.75 |
Can find out the Al in strong its phosphoric acid of product of crystallization feel through above statistic data
2O
3Content is high, between 1.75-2.08, so can improve diammonium phosphate granulation crystallization feel problem through the content that increases aluminium element in the phosphoric acid.
Claims (1)
1. method of utilizing aluminum ion to improve particle crystallization feel of diammonium phosphate; In the method for Wet-process Phosphoric Acid Production diammonium phosphate: at first Rock Phosphate (72Min BPL) is decomposed generation phosphoric acid by sulfuric acid; Phosphoric acid by in the ammonia with generate diammonium phosphate; It is characterized in that: in Rock Phosphate (72Min BPL) is decomposed the process that generates phosphoric acid, add the aluminium element of the 0-2.5% that accounts for Rock Phosphate (72Min BPL) weight or the aluminium element that the interpolation in the phosphoric acid that has generated accounts for the 0-1.25% of phosphoric acid weight; And wherein the addition of aluminium element is not 0, makes in the diammonium phosphate metal sesquioxide content at 1.5%-3%, and last phosphoric acid neutralizes with ammonia and obtains the good diammonium phosphate of particle crystallization feel; The chemical substance of the aluminium element of said interpolation is that the oxide compound of inorganic aluminate, aluminium is or/and the complex compound of aluminium.
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| CN2010102178439A CN101891169B (en) | 2010-07-01 | 2010-07-01 | Method for improving particle crystallization feel of diammonium phosphate by using aluminum ions |
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| CN2010102178439A CN101891169B (en) | 2010-07-01 | 2010-07-01 | Method for improving particle crystallization feel of diammonium phosphate by using aluminum ions |
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| CN101891169A CN101891169A (en) | 2010-11-24 |
| CN101891169B true CN101891169B (en) | 2012-07-25 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106395776B (en) * | 2016-06-27 | 2018-09-25 | 湖北宜化肥业有限公司 | The ore-proportioning method of monoammonium phosphate and/or Diammonium phosphate (DAP) is produced using mid low grade phosphate rock |
| CN109264688A (en) * | 2018-10-31 | 2019-01-25 | 湖北富邦科技股份有限公司 | A method of improving the watch crystal sense of Diammonium phosphate (DAP) |
| CN109264689A (en) * | 2018-10-31 | 2019-01-25 | 湖北富邦科技股份有限公司 | A method of improving the watch crystal sense of Diammonium phosphate (DAP) |
| CN109265199A (en) * | 2018-10-31 | 2019-01-25 | 湖北富邦科技股份有限公司 | It is a kind of to improve the prilling process for using phosphoric acid production Diammonium phosphate (DAP) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0227235A2 (en) * | 1985-12-16 | 1987-07-01 | Imc Fertilizer, Inc. | Process of removing cationic impurities from wet process phosphoric acid |
| CN101747116A (en) * | 2009-12-11 | 2010-06-23 | 湖北富邦化工科技有限公司 | A kind of method of controlling color of diammonium phosphate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6044245B2 (en) * | 1979-12-08 | 1985-10-02 | コ−プケミカル株式会社 | Method for producing monoammonium phosphate |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0227235A2 (en) * | 1985-12-16 | 1987-07-01 | Imc Fertilizer, Inc. | Process of removing cationic impurities from wet process phosphoric acid |
| CN101747116A (en) * | 2009-12-11 | 2010-06-23 | 湖北富邦化工科技有限公司 | A kind of method of controlling color of diammonium phosphate |
Non-Patent Citations (2)
| Title |
|---|
| 章守陶 等.磷矿杂质对湿法磷酸生产的影响及处理.《硫磷设计》.1997,(第4期),25－29. * |
| 郭辉 等.酸性磷铵料浆流变行为的研究(II)——磷酸中杂质的影响.《磷肥与复肥》.2003,第18卷(第2期),14-16. * |
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