CN101734973A - Method for making particle compound fertilizer from potassium fluoaluminate - Google Patents
Method for making particle compound fertilizer from potassium fluoaluminate Download PDFInfo
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- CN101734973A CN101734973A CN200910256459A CN200910256459A CN101734973A CN 101734973 A CN101734973 A CN 101734973A CN 200910256459 A CN200910256459 A CN 200910256459A CN 200910256459 A CN200910256459 A CN 200910256459A CN 101734973 A CN101734973 A CN 101734973A
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Abstract
The invention discloses a method for producing a particle compound fertilizer from potassium fluoaluminate. The production method of the invention comprises the following steps: sending concentrated sulfuric acid and potassium fluoaluminate into a conversion tank to carry out the reaction, wherein the potassium hydrogen sulfate solution generated from the reaction overflows to a geosyncline; adding a phosphoric acid water solution and a potassium hydrogen sulfate solution into the geosyncline, mixing, sending to an intermediate tank, and adding urea into the intermediate tank to obtain the liquid mixed acid; delivering the liquid mixed acid to a tubular reactor, introducing ammonia gas into the tubular reactor to carry out the neutralization reaction, and spraying the slurry into a granulator by a spray gun to carry out the granulation; and drying, screening and cooling to obtain the finished product. The product produced by the method has the advantages of smooth granules, high strength, uniform quality and flexible nutrient control, and can not easily cake; and the potassium fluoaluminate is used instead of erythrosiderite, thereby further reducing the cost.
Description
Technical field
The present invention relates to a kind of production method of composite fertilizer, specifically is a kind of method of using white potassium to produce granular compound fertilizer.
Background technology
Composite fertilizer is in nitrogen, phosphorus, three kinds of nutrients of potassium, at least the fertilizer of only making that has two kinds of nutrients by chemical process, advantage such as it has the nutrient content height, minor component is few and physical behavior is good, for balance fertilizing, improve utilization rate of fertilizer, promote the stable high yield of crop that crucial effect is arranged.The method of producing at present granular compound fertilizer mostly is during urea is directly added and in the feeding trough or utilizes urine to melt groove fused urea to be sprayed in the secondary granulation machine, composite fertilizer is carried out the secondary parcel improve nitrogen content; Short, easy efflorescence of the product stock time that this kind production method is produced, caking.
Potash fertilizer (effective constituent is potassium oxide) is one of chemical fertilizer three elements, the base fertilizer that is widely used in farm crop and cash crop in the agricultural with topdress, it promotes the formation of plant protein and carbohydrate, strengthen lodging tolerance, it is the key element that improves quality of agricultural product, have the effect of nitrogen phosphorus and other nutritive elements in the balance plant, potash fertilizer has the branch of white potassium and red potassium.Repone K is white when producing, but because the Repone K of white has water absorbability, caking easily, inconvenience when using, thus add man-hour some added a kind of organic compound of redness, form red potassium.At present, it is that about 60% red potassium is produced that the method for production composite fertilizer mostly is to use KCE content, because red potassium price height causes composite fertilizer's production cost to raise.Under current disadvantageous economic form, use red potassium to cause cost to raise, have a strong impact on the performance of enterprises.
Summary of the invention
In order to overcome the shortcoming that above-mentioned prior art exists, the object of the present invention is to provide a kind of production method of using white potassium to produce granular compound fertilizer, the product particle slyness that this method is produced, intensity is big, and quality is even, prevented from caking, and nutrient control is comparatively flexible.
For addressing the above problem, the present invention by the following technical solutions: a kind of method of using white potassium to produce granular compound fertilizer may further comprise the steps:
(1) be that 98% the vitriol oil and white potassium (Repone K) are sent in the conversion tank and reacted with mass percentage concentration, the potassium hydrogen sulfate solution overflow that reaction generates is to geosyncline, and the described vitriol oil is the vitriol oil that per 1 ton of white potassium adds the 0.75-1.0 cubic meter with the ratio of white potassium;
(2) adding mass percentage concentration in geosyncline is the phosphate aqueous solution of 19.0-21.0%, with enter medial launder after potassium hydrogen sulfate solution that step (1) generates mixes, the volume ratio of the vitriol oil of the middle adding of the phosphate aqueous solution of described adding and step (1) is 3.0-7.5: 1;
(3) ratio according to the formed mixed solution adding of per 1 cubic metre of step (2) 30-200 kilogram urea adds medial launder with urea, makes liquid mixed acid, and fully mixes;
(4) then the formed liquid mixed acid of step (3) is delivered in the tubular reactor, and in tubular reactor, feed ammonia (with ammonia rather than ammoniacal liquor, be in order to guarantee the viscosity of slip) carry out neutralization reaction, liquid mixed acid and ammonia carry out entering neutralizing well after the neutralization reaction, and the cooling back forms the slip with viscosity in neutralizing well; Described ammonia feeding amount is that per 1 cubic metre of liquid form mixt feeds 125-140 kilogram ammonia;
(5) slip is sprayed into and then by spray gun and to carry out granulation in the tablets press; Drying, screening, cooling obtain finished product then.
Further technical scheme of the present invention is: a kind of method of using white potassium to produce granular compound fertilizer, it is characterized in that: the slip that described step (4) forms enters feeding trough again, the ratio adding urea that in feeding trough, adds 10-120 kilogram urea in per 1 cubic metre of slip, after treating that urea fully melts, and then by spray gun slip is sprayed into and to carry out granulation in the tablets press; Drying, screening, cooling obtain finished product then.
Further technical scheme of the present invention is: a kind of method of using white potassium to produce granular compound fertilizer, it is characterized in that: in the high-nitrogen compound fertilizer spray pelleting process, during neutralization reaction, also can in tubular reactor, add the trace element that one or more can play the farm crop needs of regulating effect to soil, comprise boron, manganese, copper, zinc.
The invention has the beneficial effects as follows:
1, present method is that raw material production composite fertilizer compares production cost with red potassium (cost is 41 yuan/1% potassium oxide) and reduced significantly with white potassium (cost is 34 yuan/1% potassium oxide), effectively improves the business economic benefit.
2, this production technique is compared with granular compound fertilizer production technique in the past, the constant product quality of utilizing method to produce, granularity slyness, attractive in appearance; Intensity big (granular compound fertilizer intensity of the present invention is about 80N, and existing granular compound fertilizer intensity is about 100N), quality is even, prevented from caking.Described quality is meant that evenly the urea that this method is used is all to be dissolved in the slip, the granulating of whitewashing again after mixing with slip; That is to say that the nitrogen content of this method all is uniform from particle integral body, thereby prevented from caking; And it is not uniform to melt composite fertilizer's particle nitrogen content that parcel compound fertilizer granules method produces by spray urine, mainly concentrates on particle surface, because that urine melts is different with the potential of hydrogen of composite fertilizer particle, and composite fertilizer's slightly acidic, urine melts weakly alkaline, causes that composite fertilizer easily lumps, efflorescence.
2, this method is implemented conveniently, can utilize existing potassium sulfate compound fertilizer spray granulating production equipment to transform enforcement a little, so less investment, instant effect, through adjusting the back trial production, can reach stable and high yields.But also it is wayward to have solved the slip viscosity, the granulating problem of difficult.
3, the high-nitrogen compound fertilizer produced of this method carries out in tubular reactor in the process of combination reaction, and also necessary trace elements of farm crop such as chemical combination boron, manganese, copper, zinc as required can play good effectively regulating effect to soil.
Description of drawings
The present invention is described further below in conjunction with drawings and Examples:
Accompanying drawing 1 is a process structure synoptic diagram of the present invention.
Embodiment
Below with specific embodiment its further effect is described.
Embodiment 1: the composite fertilizer with production 15-15-15 is an example:
(1) with the 338kg mass percentage concentration is 98% the vitriol oil (density is 1.84g/ml) and 235kg Repone K (K
2O content is 60%) to send in the conversion tank and react, the potassium hydrogen sulfate solution overflow that reaction generates is to geosyncline;
(2) adding the 900kg mass percentage concentration in geosyncline is 20.5% phosphate aqueous solution, and enters medial launder after potassium hydrogen sulfate solution that step (1) generates mixes;
(3) ratio according to 90 kilograms of urea of the formed mixed solution adding of per 1 cubic metre of step (2) adds medial launder with urea, makes liquid mixed acid, and fully mixes;
(4) liquid mixed acid that then step (3) is formed is delivered in the tubular reactor, and the ratio feeding ammonia in 125 kilograms of ammonias of per 1 cubic metre of liquid mixed acid feeding carries out neutralization reaction in tubular reactor, liquid mixed acid and ammonia carry out entering neutralizing well after the neutralization reaction, and the cooling back forms the slip with viscosity in neutralizing well;
(5) slip that forms of step (4) enters feeding trough again, adds the ratio adding urea of 30 kilograms of urea in feeding trough by per 1 cubic metre of slip, treat that urea fully melts after, by spray gun slip is sprayed into and to carry out granulation in the tablets press; Drying, screening, cooling obtain finished product then.
Embodiment 2: to produce 14-16-15 composite fertilizer is example
(1) with the 338kg mass percentage concentration is 98% the vitriol oil (density is 1.84g/ml) and 235kg Repone K (K
2O content is 60%) to send in the conversion tank and react, the potassium hydrogen sulfate solution overflow that reaction generates is to geosyncline;
(2) adding the 940kg mass percentage concentration in geosyncline is 20.5% phosphate aqueous solution, and enters medial launder after potassium hydrogen sulfate solution that step (1) generates mixes;
(3) ratio according to 60 kilograms of urea of the formed mixed solution adding of per 1 cubic metre of step (2) adds medial launder with urea, makes liquid mixed acid, and fully mixes;
(4) liquid mixed acid that then step (3) is formed is delivered in the tubular reactor, and the ratio feeding ammonia in 125 kilograms of ammonias of per 1 cubic metre of liquid mixed acid feeding carries out neutralization reaction in tubular reactor, liquid mixed acid and ammonia carry out entering neutralizing well after the neutralization reaction, and the cooling back forms the slip with viscosity in neutralizing well;
(5) slip that forms of step (4) enters feeding trough again, adds the ratio adding urea of 30 kilograms of urea in feeding trough by per 1 cubic metre of slip, treat that urea fully melts after, by spray gun slip is sprayed into and to carry out granulation in the tablets press; Drying, screening, cooling obtain finished product then.
Embodiment 3: to produce 13-17-15 composite fertilizer is example
(1) with the 338kg mass percentage concentration is 98% the vitriol oil (density is 1.84g/ml) and 235kg Repone K (K
2O content is 59%) to send in the conversion tank and react, the potassium hydrogen sulfate solution overflow that reaction generates is to geosyncline;
(2) adding the 960kg mass percentage concentration in geosyncline is 20.5% phosphate aqueous solution, and enters medial launder after potassium hydrogen sulfate solution that step (1) generates mixes;
(3) ratio according to 60 kilograms of urea of the formed mixed solution adding of per 1 cubic metre of step (2) adds medial launder with urea, makes liquid mixed acid, and fully mixes;
(4) liquid mixed acid that then step (3) is formed is delivered in the tubular reactor, and the ratio feeding ammonia in 125 kilograms of ammonias of per 1 cubic metre of liquid mixed acid feeding carries out neutralization reaction in tubular reactor, liquid mixed acid and ammonia carry out entering neutralizing well after the neutralization reaction, and the cooling back forms the slip with viscosity in neutralizing well;
(5) by spray gun slip is sprayed into then and carry out granulation in the tablets press; Drying, screening, cooling obtain finished product then.
Claims (3)
1. a method of using white potassium to produce granular compound fertilizer is characterized in that, may further comprise the steps:
(1) be that 98% the vitriol oil and white potassium are sent in the conversion tank and reacted with mass percentage concentration, the potassium hydrogen sulfate solution overflow that reaction generates is to geosyncline, and the described vitriol oil is the vitriol oil that per 1 ton of white potassium adds the 0.75-1.0 cubic meter with the ratio of white potassium;
(2) adding mass percentage concentration in geosyncline is the phosphate aqueous solution of 19.0-21.0%, with enter medial launder after potassium hydrogen sulfate solution that step (1) generates mixes, the volume ratio of the vitriol oil of the middle adding of the phosphate aqueous solution of described adding and step (1) is 3.0-7.5: 1;
(3) ratio according to the formed mixed solution adding of per 1 cubic metre of step (2) 30-200 kilogram urea adds medial launder with urea, makes liquid mixed acid, and fully mixes;
(4) then the formed liquid mixed acid of step (3) is delivered in the tubular reactor, and the feeding ammonia carries out neutralization reaction in tubular reactor, liquid mixed acid and ammonia carry out entering neutralizing well after the neutralization reaction, and the cooling back forms the slip with viscosity in neutralizing well; Described ammonia feeding amount is that per 1 cubic metre of liquid form mixt feeds 125-140 kilogram ammonia;
(5) slip is sprayed into and then by spray gun and to carry out granulation in the tablets press; Drying, screening, cooling obtain finished product then.
2. a kind of method of using white potassium to produce granular compound fertilizer as claimed in claim 1, it is characterized in that, the slip that described step (4) forms enters feeding trough again, the ratio adding urea that in feeding trough, adds 10-120 kilogram urea in per 1 cubic metre of slip, after treating that urea fully melts, and then carry out the described granulation of step (5), drying, screening, cooling.
3. a kind of method of using white potassium to produce granular compound fertilizer as claimed in claim 1 or 2, it is characterized in that, described granular compound fertilizer is high nitrogen granular compound fertilizer, when described step (4) is carried out neutralization reaction, adds in micronutrient boron, manganese, copper or the zinc one or more in tubular reactor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910256459A CN101734973A (en) | 2009-12-25 | 2009-12-25 | Method for making particle compound fertilizer from potassium fluoaluminate |
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| CN200910256459A CN101734973A (en) | 2009-12-25 | 2009-12-25 | Method for making particle compound fertilizer from potassium fluoaluminate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351588A (en) * | 2011-07-05 | 2012-02-15 | 山东聊城鲁西化工第五化肥有限公司 | Production method of novel chemically synthesized ammoniated sulfur-base composite fertilizer |
| CN105884455A (en) * | 2016-04-15 | 2016-08-24 | 史丹利化肥（平原）有限公司 | High-nitrogen sustained-release compound fertilizer for fruits and vegetables and preparation method of compound fertilizer |
| CN106220278A (en) * | 2016-07-27 | 2016-12-14 | 中化化肥有限公司成都研发中心 | A kind of additive improving potassium sulfate compound fertilizer granule strength and the preparation method of high-strength complex Hefei granule |
| CN107141048A (en) * | 2017-07-12 | 2017-09-08 | 烟台市昊星晟信息技术有限公司 | A kind of production method for high nitrogen fertilizer of whitewashing |
-
2009
- 2009-12-25 CN CN200910256459A patent/CN101734973A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351588A (en) * | 2011-07-05 | 2012-02-15 | 山东聊城鲁西化工第五化肥有限公司 | Production method of novel chemically synthesized ammoniated sulfur-base composite fertilizer |
| CN102351588B (en) * | 2011-07-05 | 2013-11-06 | 山东聊城鲁西化工第五化肥有限公司 | Production method of novel chemically synthesized ammoniated sulfur-base composite fertilizer |
| CN105884455A (en) * | 2016-04-15 | 2016-08-24 | 史丹利化肥（平原）有限公司 | High-nitrogen sustained-release compound fertilizer for fruits and vegetables and preparation method of compound fertilizer |
| CN106220278A (en) * | 2016-07-27 | 2016-12-14 | 中化化肥有限公司成都研发中心 | A kind of additive improving potassium sulfate compound fertilizer granule strength and the preparation method of high-strength complex Hefei granule |
| CN107141048A (en) * | 2017-07-12 | 2017-09-08 | 烟台市昊星晟信息技术有限公司 | A kind of production method for high nitrogen fertilizer of whitewashing |
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Open date: 20100616 |