CN106831053A

CN106831053A - A kind of production method of graininess, function intensified type phosphorus containing magnesium ammonium

Info

Publication number: CN106831053A
Application number: CN201710072698.1A
Authority: CN
Inventors: 郭成岗; 王煜; 资学民; 王永宏; 李正强; 韦伟文; 李财红; 陈鑫; 王婷婷
Original assignee: Yunnan Three Circles Sinochem Fertilizers Co Ltd
Current assignee: Yunnan Three Circles Sinochem Fertilizers Co Ltd
Priority date: 2017-02-10
Filing date: 2017-02-10
Publication date: 2017-06-13
Anticipated expiration: 2037-02-10
Also published as: CN106831053B

Abstract

The invention discloses a kind of graininess, function intensified type ammonium phosphate production method containing magnesium.5%~50% of phosphoric acid total amount needed for production of ammonium phosphate, plus magnesia reaction are taken, gains are passed through in liquefied ammonia and obtain the reaction slurry of phosphoric acid ammonium magnesium and phosphorus ammonium；Remaining 95~50% phosphoric acid presses original technique productions phosphorus ammonium particle, and above-mentioned reaction slurry is sent into granulation drive end unit, and spraying is wrapped in phosphorus ammonium particle surface, then obtains ammonium phosphate product containing magnesium through drying, screening, cooling.The method is that traditional ammonium phosphate product increased important moderate-element magnesium, and magnesium has important cooperative effect with phosphorus, can be obviously promoted absorption of the crop to phosphorus, improves the fertilizer efficiency and utilization rate of phosphate fertilizer, improves crop quality.The method can effectively prevent the ammonium phosphate product moisture absorption, decomposition, recrystallization simultaneously, function similarly to anti-dust, the anti-caking effect of parcel oil, and with certain slow release effect.Present invention process is simple, practical, efficiently, it is good product quality, good in economic efficiency, environment-friendly, with applications well prospect.

Description

A kind of production method of graininess, function intensified type phosphorus containing magnesium ammonium

Technical field

The invention belongs to phosphatic compound fertilizer technical field, a kind of phosphoric acid in a wet process, liquefied ammonia and magnesia (oxidation are specifically related to Magnesium) it is primary raw material, using existing monoammonium phosphate device, production graininess, function intensified type phosphorus containing magnesium ammonium (including MAP, phosphorus Sour two ammoniums) product method.

Background technology

Magnesium elements are one of main compositions of plant inner chlorophyll molecule, and it can promote photosynthesis of plant and life Development long, is important moderate-element necessary to plant growth.And two kinds of elements of magnesium and phosphorus have stronger cooperative effect, magnesium The presence of element, can be obviously promoted absorption of the crop to phosphorus nutrient, improve crop yield and quality, improve the fertilizer efficiency of phosphorus compound fertilizer And utilization rate.

Single ammonium magnesium phosphate product, simultaneously containing phosphorus, nitrogen and magnesium, in this regard with some superiority；But it is insoluble in Water, is the slow-release fertilizer of solubility in citric acid, and the effect for being unable to fast onset chemical fertilizer is administered alone, and can only typically be applied as base manure, no Can serve as topdressing, therefore, at home and abroad the product belongs to the non-mainstream product in fertilizer, and its production, usage quantity are considerably less.

At present, the main production process of domestic and international ammonium magnesium phosphate has：(1) direct synthesis technique：Phosphoric acid by wet process adds magnesia, then Ammonification is neutralized, and obtains magnesium ammonium phosphate sediment, carries out solid-liquor separation, is dried, and obtains powdered crystalline product；(2) high-magnesium-phosphorus ore chemistry Method of purification de-magging by-product method：After high-magnesium-phosphorus ore is levigate, the phosphoric acid or phosphoric acid and the mixed acid of sulfuric acid of certain ratio are added, passed through Chemical reaction, the magnesium in dissolving phosphorus ore, carries out solid-liquor separation, obtains de-magging purification phosphorus ore, and soluble phosphoric acid two is contained in liquid phase Hydrogen magnesium, magnesium sulfate, then liquid phase ammonification are neutralized, and are settled out ammonium magnesium phosphate, carry out solid-liquor separation, are dried, and obtain powdered crystalline product Product；(3) ammonium nitrogen sewage by-product method is removed：In the sewage containing phosphate radical and ammonium nitrogen, appropriate or excessive magnesium ion, precipitation are added Go out ammonium magnesium phosphate, carry out solid-liquor separation, dry, obtain powdered crystalline product.Three of the above ammonium magnesium phosphate preparation method, can only Single powdered crystalline ammonium magnesium phosphate product is obtained, has been addressed before its defect.And direct synthesis technique, operation is loaded down with trivial details, by price more Water-soluble phosphorus high is converted into low-cost citric acid soluble phosphorus, it appears not economical enough；By-product method generates ammonium magnesium phosphate product, there is product Thing concentration is low, crystallization thin, unstable product quality the problems such as.And, single ammonium magnesium phosphate is seldom carried out as a kind of fertilizer Produce and use.

Ammonium phosphate product (ammonium of phosphoric acid one, Diammonium phosphate (DAP), similarly hereinafter) is although belong to phosphorus compound fertilizer, and its is phosphorous higher (predominantly Water soluble quick-acting phosphorus), it is nitrogenous relatively low, therefore the phosphorus needed for it is mainly to provide plant growth.China's monoammonium phosphate device production capacity has reached It is production capacity and a kind of maximum high-concentration phosphate compound fertilizerses of usage quantity to 30,000,000 tons or so.At present, domestic and international granular phosphorus ammonium is produced Product, the problem of generally existing the following aspects：One is that its particle surface easily makes moist because the water solubility of ammonium phosphate product is strong (storing up especially in high temperature, the summer of high humility, rainy season or for a long time), after making moist, product particle surface is easy for generation one Determine dissolving and the recrystallization of degree, so as to cause product particle surface " becoming mildewed ", discoloration, irregular colour is even, unstable and produces The problems such as there is adhesion, caking in product particle；Two is that, due to the moisture absorption of product particle surface, dissolving, recrystallization, surface " becoming mildewed " is easy Come off, produce a number of dust, packaging, accumulating, using etc. link easily there is dust pollution；In order to prevent product from existing Packaging, accumulating, using etc. link occur dust pollution and in order to prevent the moisture absorption of product particle surface, recrystallization, cause product Discoloration, irregular colour is even, unstable and the appearance quality such as product caking, at present, domestic and international granular ammonium phosphate production, and typically Using the method in the appropriate parcel oil of its particle surface spraying (parcel oil brings the anti-caking agent of the species such as appropriate organic amine into)； Have using one layer of method of sulphur is sprayed in ammonium phosphate product particle surface to produce sulphur clothing phosphorus ammonium.But what these methods were present asks Topic is：(1) parcel oil belongs to PETROLEUM PROCESSING product, for wrapping up ammonium phosphate product particle surface, the change of soil can be increased after Containing harmful substances such as a certain amount of heavy metals in oxygen demand COD, and parcel oil, there is environment and crop pollution risk；(2) Using sulphur coating ammonium phosphate product particle surface, sulphur clothing phosphorus ammonium is produced, although can play prevents product particle surface from occurring inhaling Wet, recrystallization, discoloration, irregular colour is even, unstable and the appearance quality such as product caking, while being measured in can also increasing Elementary sulfur, is additionally, since elemental sulfur and is substantially insoluble in water, therefore sulphur clothing ammonium phosphate product is also just provided with certain slow-release function (master Refer to the nitrogenous sustained release of phosphorus ammonium).But ammonium phosphate product is mainly characterized by that phosphorus content is very high, and the method for sulphur clothing parcel is not drawn Enter the moderate-element magnesium that there is important cooperative effect with phosphorus, and, in its production process, also there is solid or liquid elemental sulfur The problems such as dust sulphur, sublimed sulfur easily trigger the security risk of blast in addition difficulty and production system.

At present, in existing technology and method, do not overcome well still, solve graininess ammonium phosphate product without magnesium and The problem of the aspect such as product caking easily occurs that moisture absorption, recrystallization, discoloration, irregular colour be even, unstable and in product particle surface. It is not enough for these, a kind of economic, reasonable, graininess ammonium phosphate production method containing magnesium of technical feasibility is found, product is met in work( The market demand of the aspects such as energy reinforcing, Quality advance, just turns into major issue urgently to be resolved hurrily.

The content of the invention

Deficiency in terms of it is an object of the invention to be directed to existing granular phosphorus ammonium production technology and product quality, carries It is primary raw material for a kind of phosphoric acid, liquefied ammonia and magnesia in a wet process, function intensified is prepared using existing production of ammonium phosphate device The method of the granular ammonium of phosphorus containing magnesium new product, to be obviously improved quality, fertilizer efficiency and the performance of ammonium phosphate product.

The purpose of the present invention is achieved by the following technical programs.

Unless otherwise indicated, percentage of the present invention is mass percent.

The production method of a kind of graininess, function intensified type phosphorus containing magnesium ammonium, comprises the following steps：

(1) by the 5-50% of phosphoric acid total amount used by production of ammonium phosphate (with pure P₂O₅Meter, similarly hereinafter) phosphoric acid of ratio share, send To in the reactive tank newly established, addition magnesia is uniformly mixed, and the addition of magnesia is：Pure content of magnesia is accounted in magnesia The 5%~90% of the theoretical amount of magnesia, 20~90 DEG C of controlling reaction temperature, by 10- completely needed for generation ammonium magnesium phosphate 120min stirring reactions, obtain the reactant A containing biphosphate magnesium solution.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate During, the normal degree of neutralization that is controlled during preneutralization (degree of neutralization i.e. nitrogen phosphorus mol ratio, similarly hereinafter.MAP about 0.90-1.20： 1, Diammonium phosphate (DAP) about 1.40-1.60：1) the reaction slurry B containing ammonium magnesium phosphate and phosphorus ammonium mixture, is thus prepared.

(3) in production of ammonium phosphate phosphoric acid total amount the phosphoric acid of remaining 95-50% (with pure P₂O₅Meter, similarly hereinafter), by original The technological process of production, is sent in tubular reactor, is passed through liquefied ammonia, neutralizes to during production of ammonium phosphate, and tubular reactor is normally controlled Degree of neutralization (the MAP about 0.90-1.20 of system：1, Diammonium phosphate (DAP) about 1.40-1.60：1) neutralize slip, is obtained, then by existing There is production technology, neutralize slip is sent to comminutor carries out slurry-spraying pelletizing.

(4) reaction slurry B is sent to comminutor, by the range of distance granulation drive end unit port of export head 0.5-4.0m Set multigroup shower nozzle is whitewashed, and reaction slurry B is sprayed on into the phosphorus ammonium particle table by above-mentioned steps (3) granulating Face, surface whitewashing coating, parcel treatment are carried out to it, carry out granulation production by existing method afterwards.

During production Diammonium phosphate (DAP), further hydrojet ammonia carries out ammonification in comminutor, controls the neutralization of diammonium phosphate product It is 1.70-2.10 to spend：1.

(5) comminutor discharging, by original technological process of production, method and control condition, by drying, screening, cooling, Metering packing obtains graininess, function intensified type ammonium phosphate product containing magnesium.

Preferred production technology and control condition are：

(1) by phosphoric acid total amount used by production of ammonium phosphate (with pure P₂O₅Meter, similarly hereinafter) 10-35% ratio shares phosphoric acid, It is sent in the reactive tank newly established, addition magnesia is uniformly mixed, and the addition of magnesia is：Pure content of magnesia in magnesia 15%~40% of the theoretical amount of magnesia completely needed for generation ammonium magnesium phosphate is accounted for, 40~70 DEG C of controlling reaction temperature is passed through 20-60min stirring reactions, obtain the reactant A containing biphosphate magnesium solution.

(2) by existing, the idle preneutralization groove of reactant A feeding production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to phosphorus ammonium In production process, normal degree of neutralization (the degree of neutralization i.e. nitrogen phosphorus mol ratio, MAP about 0.95-1.10 controlled during preneutralization： 1, Diammonium phosphate (DAP) about 1.40-1.60：1) the reaction slurry B containing ammonium magnesium phosphate and phosphorus ammonium mixture, is thus prepared.

(3) phosphoric acid of production of ammonium phosphate phosphoric acid total amount remaining 90~65%, is sent in tubular reactor according to a conventional method, leads to Enter liquefied ammonia, obtain neutralize slip, being sent to comminutor carries out slurry-spraying pelletizing.

(4) the reaction slurry B prepared in step (2) is sent to comminutor and exports termination 0.5-3.0m apart from afterbody In the range of set multigroup shower nozzle whitewashed, be sprayed on by above-mentioned steps (3), the phosphorus ammonium particle surface of granulating, Surface whitewashing coating, parcel treatment are carried out to it, granulation production is carried out by existing method afterwards.

During production Diammonium phosphate (DAP), further hydrojet ammonia carries out ammonification in comminutor, controls the neutralization of diammonium phosphate product It is 1.80-1.95 to spend：1.

(5) comminutor discharging, by the original technological process of production, method and control condition, by drying, screening, cooling, Metering packing obtains graininess, function intensified type ammonium phosphate product containing magnesium.

Wherein, the raw material magnesia for being used, its content of magnesia is in 40-95%.Prepare containing ammonium magnesium phosphate and The reaction slurry B of phosphorus ammonium mixture, is equally applicable to produce grain using monoammonium phosphate device or using composite fertilizer, compound fertilizer plant When shape composite fertilizer, compound fertilizer product, whitewashing coating, parcel treatment are carried out to its particle surface, produce function intensified type granular multiple Hefei, compound fertilizer product.A new neutralization chamber can individually be set up instead of the existing preneutralization groove of production of ammonium phosphate device.Can profit A new parcel cylinder is set up with the existing parcel cylinder of production of ammonium phosphate device or individually, above-mentioned reaction slurry B is sent to the parcel Cylinder is whitewashed, and coating, parcel treatment are carried out to product particle surface.

Relative to prior art, the present invention has advantages below：

(1) existing ammonium phosphate production process and device are utilized, is prepared and is contained ammonium magnesium phosphate and phosphorus ammonium (ammonium of phosphoric acid one, phosphoric acid Mixed slurry two ammoniums, similarly hereinafter), surface coating, parcel treatment are carried out to the phosphorus ammonium particle of granulating in granulation drive end unit.Its One, using the caking property of phosphor ammonium slurry contained in ammonium magnesium phosphate and phosphorus ammonium mixed slurry, by insoluble ammonium phosphate magnesium powder Shape thing (precipitation) is tightly adhered to the ammonium phosphate product particle surface of granulating；Second, by containing insoluble ammonium magnesium phosphate After the coating of the mixed slurry of powder, parcel treatment, the moisture absorption of ammonium phosphate product particle surface, dissolubility are decreased obviously, can be with The moisture absorption of product particle surface, recrystallization are effectively prevented, causes that product changes colour, irregular colour is even, unstable and product caking etc. Appearance quality；The dust that product is produced by surface moisture absorption, dissolving and recrystallization (" becoming mildewed ") can also be significantly reduced, is improved Product packaging, accumulating, using etc. link occur dust pollution question；Third, the addition quantity (ratio by adjusting magnesia Rate) easily realize that ammonium phosphate product nitrogen, phosphorus, total nutrient and water-soluble phosphorus account for the control of available phosphorus ratio；Fourth, in traditional phosphorus ammonium In production technology and product, the addition of the important moderate-element magnesium required for realizing plant growth well, magnesium has with phosphorus There is very strong cooperative effect, magnesium can remarkably promote the photosynthesis of crop, promote crop to absorb phosphorus, so as to improve The phosphorus utilization of ammonium phosphate product (phosphorus content is very high), while crop quality can also be improved；Fifth, by containing insoluble phosphoric acid After coating, the parcel treatment of the mixed slurry of ammonium magnesium powder, ammonium phosphate product possesses certain slow-release function, can slow down foster The rate of release for dividing, improves utilization rate of fertilizer and fertilizer efficiency, reduces Fertilizer application amount, realizes increasing both production and income, improves the product of Planting household Go out input ratio, increase economic benefit.

(2) using ammonium magnesium phosphate and the mixed slurry of phosphorus ammonium, ammonium phosphate product is entered instead of now widely used parcel oil Row surface coating, parcel treatment, the ammonium phosphate product of production belong to environmentally friendly machine, it is possible to reduce the chemical oxygen consumption (COC) of oil product (COD), the pollution that heavy metal etc. is caused to soil, realizes green fertilising, green planting, and environmental benefit, ecological effect are notable.

(3) most of production of ammonium phosphate enterprises, used " tubular reactor+preneutralization " in the past, i.e. hybrid technique production phosphorus Ammonium product, by constantly development, technological transformation, at present, generally only with tubular reactor produced so that preneutralization reactive tank System idle, therefore traditional production of ammonium phosphate device is utilized, graininess, function intensified type phosphorus containing magnesium are produced using the technology of the present invention Ammonium product, only need to simply be transformed the monoammonium phosphate device of existing manufacturing enterprise, using stand-by equipment, not increase investment substantially, Production is capable of achieving, product quality lifting, function intensified, upgrading purpose is reached.

(4) present invention process is simple, practical, and raw material is inexpensive, low production cost, economic benefit, obvious environment benefit.

Brief description of the drawings

Fig. 1 is the preneutralization that prior art is generally used --- tubular reactor process produces the technological process of ammonium phosphate product Schematic diagram；Dotted line represents idle unused portion in figure.

Fig. 2 is the process flow diagram of the inventive method.

Specific embodiment

The present invention is further illustrated with reference to the accompanying drawings and examples, but drawings and Examples are not to this hair The restriction of bright technical scheme.It is all based on present invention teach that the conversion made all should belong to protection scope of the present invention.

Embodiment 1

Graininess, function intensified type ammonium phosphate product containing magnesium are prepared, it is specific as shown in Figure 2.

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 20 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 25%, stirring mixing is equal Even, 50 DEG C of controlling reaction temperature, by 40min stirring reactions, obtains the reactant A containing biphosphate magnesium solution.This implementation In example, the content of MgO of magnesia in kind used is 75%, so the magnesia amount of being actually added into kind is 3.8 parts.

Magnesia adds quantity calculation specifications：According to H₃PO₄With MgO, NH₃React completely, generate MgNH₄PO₄Chemical reaction Formula, can calculate with 20 parts (with pure P₂O₅Meter) phosphoric acid (equivalent to 27.6 parts of H₃PO₄) react completely, required pure MgO Theoretical amount be 11.26 parts.In this embodiment 1, the amount of pure MgO is actually added into, only accounts for the 25% of required theoretical amount, therefore The amount for being actually added into pure MgO is：11.26 ╳ 25%=2.82 (part), the content of MgO of actually used magnesia is 75%, therefore real Border add magnesia amount be：2.82 ÷ 75%=3.8 (part).

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：MAP 1.08：1) reaction slurry B, is thus prepared.

(3) remaining 80 parts of phosphoric acid, is sent in tubular reactor according to a conventional method, is passed through liquefied ammonia, obtains neutralize slip, is sent to Comminutor carries out slurry-spraying pelletizing.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, further to the normal degree of neutralization for controlling of production of ammonium phosphate, (degree of neutralization is nitrogen phosphorus mol ratio for neutralization： MAP 1.08：1).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 1.68% MgO in addition to containing corresponding N, P.

Embodiment 2

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 10 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 15%, stirring mixing is equal Even, 40 DEG C of controlling reaction temperature is reacted by 45min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 80%, so the magnesia amount of being actually added into kind is 1.1 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：MAP 1.05), thus prepare reaction slurry B.

(3) remaining 90 parts of phosphoric acid, is sent in tubular reactor according to a conventional method, is passed through liquefied ammonia, obtains neutralize slip, is sent to Comminutor carries out slurry-spraying pelletizing.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, further to the normal degree of neutralization for controlling of production of ammonium phosphate, (degree of neutralization is nitrogen phosphorus mol ratio for neutralization： MAP 1.05).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 0.56% MgO in addition to containing corresponding N, P.

Embodiment 3

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 10 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 25%, stirring mixing is equal Even, 50 DEG C of controlling reaction temperature is reacted by 60min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 85%, so the magnesia amount of being actually added into kind is 1.7 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：MAP 1.02), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, further to the normal degree of neutralization for controlling of production of ammonium phosphate, (degree of neutralization is nitrogen phosphorus mol ratio for neutralization： MAP 1.02).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 0.86% MgO in addition to containing corresponding N, P.

Embodiment 4

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 10 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 40%, stirring mixing is equal Even, 60 DEG C of controlling reaction temperature is reacted by 80min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 90%, so the magnesia amount of being actually added into kind is 2.5 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：MAP 1.10), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization that neutralization to production of ammonium phosphate is normally controlled：Phosphoric acid one Ammonium 1.10).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 1.36% MgO in addition to containing corresponding N, P.

Embodiment 5

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 35 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 25%, stirring mixing is equal Even, 60 DEG C of controlling reaction temperature is reacted by 80min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 45%, so the magnesia amount of being actually added into kind is 11 parts.

(3) remaining 65 parts of phosphoric acid, is sent in tubular reactor according to a conventional method, is passed through liquefied ammonia, obtains neutralize slip, is sent to Comminutor carries out slurry-spraying pelletizing.

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 2.81% MgO in addition to containing corresponding N, P.

Embodiment 6

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 35 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 40%, stirring mixing is equal Even, 65 DEG C of controlling reaction temperature is reacted by 70min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 50%, so the magnesia amount of being actually added into kind is 16 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：MAP 1.08), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, further to the normal degree of neutralization for controlling of production of ammonium phosphate, (degree of neutralization is nitrogen phosphorus mol ratio for neutralization： MAP 1.08),

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 4.33% MgO in addition to containing corresponding N, P.

Embodiment 7

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 20 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 25%, stirring mixing is equal Even, 55 DEG C of controlling reaction temperature is reacted by 45min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 55%, so the magnesia amount of being actually added into kind is 5.1 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：Diammonium phosphate (DAP) 1.41), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization that neutralization to production of ammonium phosphate is normally controlled：Di(2-ethylhexyl)phosphate Ammonium 1.88).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 1.47% MgO in addition to containing corresponding N, P.

Embodiment 8

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 10 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 15%, stirring mixing is equal Even, 45 DEG C of controlling reaction temperature is reacted by 45min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 60%, so the magnesia amount of being actually added into kind is 1.4 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：Diammonium phosphate (DAP) 1.45), thus prepare reaction slurry B.

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 0.45% MgO in addition to containing corresponding N, P.

Embodiment 9

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 10 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 25%, stirring mixing is equal Even, 55 DEG C of controlling reaction temperature is reacted by 60min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 65%, so the magnesia amount of being actually added into kind is 2.2 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：Diammonium phosphate (DAP) 1.43), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, further to the normal degree of neutralization for controlling of production of ammonium phosphate, (degree of neutralization is nitrogen phosphorus mol ratio for neutralization： Diammonium phosphate (DAP) 1.89),

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 0.75% MgO in addition to containing corresponding N, P.

Embodiment 10

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 10 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 40%, stirring mixing is equal Even, 65 DEG C of controlling reaction temperature is reacted by 80min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 70%, so the magnesia amount of being actually added into kind is 3.2 parts.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, further to the normal degree of neutralization for controlling of production of ammonium phosphate, (degree of neutralization is nitrogen phosphorus mol ratio for neutralization： Diammonium phosphate (DAP) 1.90).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 1.19% MgO in addition to containing corresponding N, P.

Embodiment 11

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 35 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 25%, stirring mixing is equal Even, 60 DEG C of controlling reaction temperature is reacted by 65min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 75%, so the magnesia amount of being actually added into kind is 6.6 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：Diammonium phosphate (DAP) 1.42), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, further to the normal degree of neutralization for controlling of production of ammonium phosphate, (degree of neutralization is nitrogen phosphorus mol ratio for neutralization： Diammonium phosphate (DAP) 1.87).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 2.55% MgO in addition to containing corresponding N, P.

Embodiment 12

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 35 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 40%, stirring mixing is equal Even, 65 DEG C of controlling reaction temperature is reacted by 70min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 80%, so the magnesia amount of being actually added into kind is 9.9 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：Diammonium phosphate (DAP) 1.48), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization that neutralization to production of ammonium phosphate is normally controlled：Di(2-ethylhexyl)phosphate Ammonium 1.91)

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 4.01% MgO in addition to containing corresponding N, P.

Embodiment 13

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 5 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 5%, stirring mixing is equal Even, 30 DEG C of controlling reaction temperature is reacted by 40min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 85%, so the magnesia amount of being actually added into kind is 0.2 part.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：MAP 0.98), thus prepare reaction slurry B.

(3) remaining 95 parts of phosphoric acid, is sent in tubular reactor according to a conventional method, is passed through liquefied ammonia, obtains neutralize slip, is sent to Comminutor carries out slurry-spraying pelletizing.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, further to the normal degree of neutralization for controlling of production of ammonium phosphate, (degree of neutralization is nitrogen phosphorus mol ratio for neutralization： MAP 0.98).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 0.09% MgO in addition to containing corresponding N, P.

Embodiment 14

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 5 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 25%, stirring mixing is equal Even, 40 DEG C of controlling reaction temperature is reacted by 50min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 90%, so the magnesia amount of being actually added into kind is 0.8 part.

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 0.43% MgO in addition to containing corresponding N, P.

Embodiment 15

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 5 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 90%, stirring mixing is equal Even, 60 DEG C of controlling reaction temperature is reacted by 100min, obtains the reactant A containing biphosphate magnesium solution.The present embodiment In, the content of MgO of magnesia in kind used is 45%, so the magnesia amount of being actually added into kind is 5.63 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：MAP 1.18), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, further to the normal degree of neutralization for controlling of production of ammonium phosphate, (degree of neutralization is nitrogen phosphorus mol ratio for neutralization： MAP 1.18).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 1.5% MgO in addition to containing corresponding N, P.

Embodiment 16

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 20 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 5%, stirring mixing is equal Even, 35 DEG C of controlling reaction temperature is reacted by 30min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 50%, so the magnesia amount of being actually added into kind is 1.2 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：MAP 1.04), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization that neutralization to production of ammonium phosphate is normally controlled：Phosphoric acid one Ammonium 1.04).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 0.34% MgO in addition to containing corresponding N, P.

Embodiment 17

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 20 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 90%, stirring mixing is equal Even, 65 DEG C of controlling reaction temperature is reacted by 90min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 55%, so the magnesia amount of being actually added into kind is 18 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：MAP 1.06), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization that neutralization to production of ammonium phosphate is normally controlled：Phosphoric acid one Ammonium 1.06).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 5.45% MgO in addition to containing corresponding N, P.

Embodiment 18

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 50 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 5%, stirring mixing is equal Even, 40 DEG C of controlling reaction temperature is reacted by 30min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 60%, so the magnesia amount of being actually added into kind is 2.4 parts.

(3) remaining 50 parts of phosphoric acid, is sent in tubular reactor according to a conventional method, is passed through liquefied ammonia, obtains neutralize slip, is sent to Comminutor carries out slurry-spraying pelletizing.

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 0.84% MgO in addition to containing corresponding N, P.

Embodiment 19

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 50 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 25%, stirring mixing is equal Even, 55 DEG C of controlling reaction temperature is reacted by 55min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 65%, so the magnesia amount of being actually added into kind is 11 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：MAP 1.1), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization that neutralization to production of ammonium phosphate is normally controlled：Phosphoric acid one Ammonium 1.1).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 3.99% MgO in addition to containing corresponding N, P.

Embodiment 20

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 50 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 90%, stirring mixing is equal Even, 60 DEG C of controlling reaction temperature is reacted by 60min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 65%, so the magnesia amount of being actually added into kind is 39 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：MAP 1.12), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization that neutralization to production of ammonium phosphate is normally controlled：Phosphoric acid one Ammonium 1.12).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 11.79% MgO in addition to containing corresponding N, P.

Embodiment 21

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 5 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 5%, stirring mixing is equal Even, 35 DEG C of controlling reaction temperature is reacted by 40min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 70%, so the magnesia amount of being actually added into kind is 0.2 part.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：Diammonium phosphate (DAP) 1.51), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, further to the normal degree of neutralization for controlling of production of ammonium phosphate, (degree of neutralization is nitrogen phosphorus mol ratio for neutralization： Diammonium phosphate (DAP) 1.86).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 0.08% MgO in addition to containing corresponding N, P.

Embodiment 22

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 5 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 25%, stirring mixing is equal Even, 45 DEG C of controlling reaction temperature is reacted by 50min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 75%, so the magnesia amount of being actually added into kind is 0.9 part.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：Diammonium phosphate (DAP) 1.52), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization that neutralization to production of ammonium phosphate is normally controlled：Di(2-ethylhexyl)phosphate Ammonium 1.87).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 0.44% MgO in addition to containing corresponding N, P.

Embodiment 23

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 5 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 90%, stirring mixing is equal Even, 65 DEG C of controlling reaction temperature is reacted by 100min, obtains the reactant A containing biphosphate magnesium solution.The present embodiment In, the content of MgO of magnesia in kind used is 80%, so the magnesia amount of being actually added into kind is 3.2 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：Diammonium phosphate (DAP) 1.54), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, further to the normal degree of neutralization for controlling of production of ammonium phosphate, (degree of neutralization is nitrogen phosphorus mol ratio for neutralization： Diammonium phosphate (DAP) 1.92).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 1.34% MgO in addition to containing corresponding N, P.

Embodiment 24

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 20 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 5%, stirring mixing is equal Even, 40 DEG C of controlling reaction temperature is reacted by 35min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 85%, so the magnesia amount of being actually added into kind is 0.7 part.

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 0.3% MgO in addition to containing corresponding N, P.

Embodiment 25

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 20 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 90%, stirring mixing is equal Even, 70 DEG C of controlling reaction temperature is reacted by 90min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 85%, so the magnesia amount of being actually added into kind is 12 parts.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, further to the normal degree of neutralization for controlling of production of ammonium phosphate, (degree of neutralization is nitrogen phosphorus mol ratio for neutralization： Diammonium phosphate (DAP) 1.89).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 5.09% MgO in addition to containing corresponding N, P.

Embodiment 26

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 50 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 5%, stirring mixing is equal Even, 45 DEG C of controlling reaction temperature is reacted by 30min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 90%, so the magnesia amount of being actually added into kind is 1.6 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：Diammonium phosphate (DAP) 1.46), thus prepare reaction slurry B.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization that neutralization to production of ammonium phosphate is normally controlled：Di(2-ethylhexyl)phosphate Ammonium 1.90).

Embodiment 27

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 50 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 25%, stirring mixing is equal Even, 60 DEG C of controlling reaction temperature is reacted by 55min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 65%, so the magnesia amount of being actually added into kind is 11 parts.

(2) by the reactant A feeding existing preneutralization groove of production of ammonium phosphate device, liquefied ammonia is passed through, is neutralized to production of ammonium phosphate (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization of normal control：Diammonium phosphate (DAP) 1.50), thus prepare reaction slurry B.

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 3.98% MgO in addition to containing corresponding N, P.

Embodiment 28

(1) for producing the phosphoric acid total amount of ammonium phosphate product for 100 parts (with pure P₂O₅Meter, similarly hereinafter), take out 50 parts and be sent to newly Increase in reactive tank, add to generate ammonium magnesium phosphate calculating completely, account for the pure MgO of required theoretical amount 90%, stirring mixing is equal Even, 65 DEG C of controlling reaction temperature is reacted by 60min, obtains the reactant A containing biphosphate magnesium solution.In the present embodiment, The content of MgO of magnesia in kind used is 75%, so the magnesia amount of being actually added into kind is 34 parts.

(4) reaction slurry B is sent to the set multigroup spray in the range of afterbody outlet termination 0.5-4.0m of comminutor Head is whitewashed, and is sprayed on by above-mentioned steps (3), and the phosphorus ammonium particle surface of granulating, surface coating treatment is carried out to it, By the original technological process of production, (degree of neutralization is nitrogen phosphorus mol ratio to the degree of neutralization that neutralization to production of ammonium phosphate is normally controlled：Di(2-ethylhexyl)phosphate Ammonium 1.91).

(5) comminutor discharging, by the original technological process of production, obtains by drying, cooling, screening, metering packing Granular, function intensified type ammonium phosphate product containing magnesium, the product also contains 11.4% MgO in addition to containing corresponding N, P.

Claims

1. a kind of graininess, the production method of function intensified type phosphorus containing magnesium ammonium, it is characterised in that comprise the following steps：

(1) take 5%~50% of phosphoric acid total amount needed for production of ammonium phosphate to be sent in the reactive tank newly established, addition magnesia stirring mixing Uniformly, the addition of magnesia is：Pure content of magnesia accounts for the theoretical use of magnesia completely needed for generation ammonium magnesium phosphate in magnesia The 5%~90% of amount, 20~90 DEG C of controlling reaction temperature, by 10~120min stirring reactions, obtains containing magnesium dihydrogen phosphate Reactant A；

(2) by reactant A feeding production of ammonium phosphate device preneutralization groove in, be passed through liquefied ammonia neutralization, obtain containing ammonium magnesium phosphate with The reaction slurry B of phosphorus ammonium mixture；

(3) by phosphoric acid total amount needed for production of ammonium phosphate remaining 95~50% phosphoric acid, tubular type is sent into by the existing technological process of production In reactor, it is passed through the further ammonification of liquefied ammonia and neutralizes, and the slurry feeding comminutor become reconciled by carries out slurry-spraying pelletizing, obtains phosphorus Ammonium particle；

(4) multigroup shower nozzle is set in the range of the first 0.5~4.0m of the distance granulation drive end unit port of export, reaction slurry B is uniformly sprayed Apply, be wrapped in the phosphorus ammonium particle surface that step (3) is obtained；

(5) it is to obtain required to complete the granule materials drying after spraying parcel treatment, screening, cooling and metering packing Granular, function intensified type ammonium phosphate product containing magnesium.

2. graininess according to claim 1, the production method of function intensified type phosphorus containing magnesium ammonium, it is characterised in that：Control The nitrogen phosphorus mol ratio of step (2) described preneutralization, wherein being 0.90~1.20 during production MAP：1, during production Diammonium phosphate (DAP) It is 1.40~1.60：1；The nitrogen phosphorus mol ratio of rate-determining steps (3) described neutralization, wherein during production MAP for 0.90~ 1.20：1, it is 1.40~1.60 during production Diammonium phosphate (DAP)：1；Step (4), when Diammonium phosphate (DAP) is produced, the hydrojet ammonia in comminutor Further ammonia is neutralized, and the nitrogen phosphorus mol ratio for controlling diammonium phosphate product is 1.70~2.10：1.

3. graininess according to claim 1, the production method of function intensified type phosphorus containing magnesium ammonium, it is characterised in that：

In step (1), take 10%~35% of phosphoric acid total amount needed for production of ammonium phosphate and be sent in the reactive tank newly established, add magnesia It is uniformly mixed, the addition of magnesia is：Pure content of magnesia accounts for magnesia completely needed for generation ammonium magnesium phosphate in magnesia Theoretical amount 15%~40%, 40~70 DEG C of controlling reaction temperature, by 20~60min stirring reactions, obtains containing phosphorus The reactant A of acid dihydride magnesium；

In step (3), by phosphoric acid total amount needed for production of ammonium phosphate remaining 90%~65% phosphoric acid, by the existing technological process of production In feeding tubular reactor, liquefied ammonia neutralization is passed through, and the slurry feeding comminutor become reconciled by carries out slurry-spraying pelletizing, obtains phosphorus ammonium Particle；

In step (4), multigroup shower nozzle is set in the range of the first 0.5~3.0m of the distance granulation drive end unit port of export.

4. graininess according to claim 3, the production method of function intensified type phosphorus containing magnesium ammonium, it is characterised in that：Control The nitrogen phosphorus mol ratio of preneutralization described in step (2), wherein being 0.95~1.1 during production MAP：1, produce Diammonium phosphate (DAP) When be 1.42~1.52：1；The nitrogen phosphorus mol ratio neutralized described in rate-determining steps (3), wherein during production MAP for 0.95~ 1.1：1, it is 1.85~1.92 during production Diammonium phosphate (DAP)：1.

5. graininess according to claim 1, the production method of function intensified type phosphorus containing magnesium ammonium, it is characterised in that：Will step Suddenly the reaction slurry B containing ammonium magnesium phosphate and phosphorus ammonium mixture obtained by (2), for other granular complex fertilizers or granular multiple Complex fertilizer carries out surface spraying parcel treatment, so as to obtain function intensified type granular complex fertilizer, compound fertilizer product.

6. graininess according to claim 1 or 3, the production method of function intensified type phosphorus containing magnesium ammonium, it is characterised in that：Will Reaction slurry B introduces the existing parcel cylinder of production of ammonium phosphate device or sets up a new parcel cylinder, the phosphorus ammonium obtained to step (3) Particle carries out surface spraying parcel.

7. graininess according to claim 1 or 3, the production method of function intensified type phosphorus containing magnesium ammonium, it is characterised in that：Institute The content of magnesia for stating magnesia is 40~95%.