CN1062843C - Method for producing composite fertilizer by liquor jetting pelletting method - Google Patents
Method for producing composite fertilizer by liquor jetting pelletting method Download PDFInfo
- Publication number
- CN1062843C CN1062843C CN 95104148 CN95104148A CN1062843C CN 1062843 C CN1062843 C CN 1062843C CN 95104148 CN95104148 CN 95104148 CN 95104148 A CN95104148 A CN 95104148A CN 1062843 C CN1062843 C CN 1062843C
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- CN
- China
- Prior art keywords
- phosphoric acid
- fertilizer
- slurry
- composite fertilizer
- pelletting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B11/00—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
- C05B11/04—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid
- C05B11/08—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using sulfuric acid
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The present invention relates to a method for producing compound fertilizer by slurry spraying granulation. After minerals are made into mineral slurry, the mineral slurry is added to an acid tank for reacting with sulphuric acid; generated phosphoric acid and calcium sulphate are filtered and separated to obtain phosphoric acid, the phosphoric acid, ammonia and unit fertilizer containing nitrogen and potassium are added to a neutralization reaction tank together for carrying out a neutralization reaction, and the completely reacted mixed slurry is sent to a slurry spraying granulation dryer by a pump for carrying out granulation and drying to form compound fertilizer. The method omits a complex concentration working section, has the advantages of simple technology and energy saving, and uses the finished slurry of the compound fertilizer as a recycled material to produce a product with uniform component proportion.
Description
The present invention relates to the method for a kind of production composite fertilizer, particularly a kind of method with producing composite fertilizer by liquor jetting pelletting.
Compound manure has many kinds, and having of selling on the market now contains the various special-purpose fertile of trace element, and to adapt to the different needs of various crops, more general then is binary compound fertilizer and Nitrogen, Phosphorus and Potassium.Binary compound fertilizer promptly only contains the fertilizer of N, two kinds of effective ingredients of P, and Nitrogen, Phosphorus and Potassium promptly contains the fertilizer of N, P, three kinds of effective ingredients of K.Because the production development of China's compound manure is slow for many years, the phenomenon that the soil seriously lacks the few potassium of phosphorus is serious, so the various forms of composite fertilizer factory of Jian Liing was more in recent years, and most popular with three no composite fertilizers.But the method for production Nitrogen, Phosphorus and Potassium and technology are not satisfactory, and it is big facility investment often to occur, and technical process is long, problems such as energy expenditure height.Now some two kinds of production methods commonly used and problem are done following summary.
Method one: make breeze (or ore pulp) with ore reduction, after levigate, join in the acidolysis groove and react with sulfuric acid, make phosphoric acid and terra alba crystal, this mixture (extracting slip in industrial being called) is thrown into pump and carried out filtering separation in the filter, obtain the lower phosphoric acid of concentration.Phosphoric acid is fed concentration systems carry out dehydration by evaporation; be concentrated to and enter ammoniation granulator behind the finite concentration with the gas ammonia ammoniation-granulation that circulates; in granulation process; the straight fertilizer that contains N, K again with returning charge form add in the tablets press; the phosphorus ammonium that generates after the phosphoric acid ammonification mixes, drying, obtains Nitrogen, Phosphorus and Potassium.
The problem that this method exists is:
(1) a cover Phosphoric Acid Concentration system to be arranged.Phosphoric acid is the extremely strong medium of a kind of corrodibility, and is very high to the equipment and materials requirement of concentration systems, generally will use stainless steel, costs an arm and a leg, and a cover concentration systems is generally about 400,000 yuan.In addition, in concentration systems, be used for the tube bank that the well heater of heated solution is made up of 125 stainless steel tubes, feed the steam-heated cal(l)andria slip between pipe, operation is not in case cause slurry dewatering too much at once, and viscosity rises, and well heater is blocked.Therefore, overhaul of the equipments frequency height, minimum in one month will have the secondary parking maintenance, and the recondition expense height influences man-hour, and every month each fertilizer plant so the output value loss that causes are about 540,000 yuan.
(2) ammoniation-granulation is gas ammonia directly to be fed in the solid materials of phosphorus ammonium carry out ammonification, and the component proportions of the composite fertilizer's finished product after the granulation is inhomogeneous, causes the skewness of chemical fertilizer various nutrients after being administered to soil, influences the growth of farm crop; In addition, cause a large amount of ammonia losses, both wasted ammonia, pollute to atmosphere again.
(3) the drying process dust is dirty when serious, and workshop condition is abominable.
Method two: ore is through the treatment process same with method one; filtering separation obtains the lower phosphoric acid of concentration; this phosphoric acid directly fed enter concentration systems after stirring formula neutralization reactor and ammonia neutralize and concentrate; concentrate good in and slip be input to and carry out spray granulating in the spray granulation drier; in the process of granulation, other straight fertilizers that will add are also added in the spray granulating machine simultaneously and mix, thereby obtain composite fertilizer.The problem that this method exists also is to need a concentration systems.
The objective of the invention is to overcome the deficiency that above method exists, a kind of concentration systems that do not have is provided, utilize spray granulating to produce composite fertilizer's method of particle uniform ingredients.
Fig. 1 is the schema of common method one ammoniation-granulation production composite fertilizer;
Fig. 2 is the schema of common method two producing composite fertilizer by liquor jetting pelletting;
Fig. 3 is the schema of the inventive method production composite fertilizer;
Below in conjunction with accompanying drawing enforcement of the present invention is elaborated:
When producing according to method of the present invention, as shown in Figure 3, also be earlier ore to be made ore pulp to join in the acid tank and react with sulfuric acid, the phosphoric acid and the calcium sulfate filtering separation that generate are obtained phosphoric acid, reaction conditions, as temperature, pressure etc. and existing method one, two is identical, different is: with this phosphoric acid, ammonia and the N that contains that should add, the straight fertilizer of K joins together in the neutralization reaction groove and carries out neutralization reaction, with pump the mixed slurry that reacts completely is sent into and to be carried out granulating and drying in the spray granulation drier, obtain qualified composite fertilizer, wherein contain N, the straight fertilizer of K typically refers to MH
4CL, (NH
4)
2SO
4, K
2SO
4, KCL, what of element add-on can adjust accordingly according to customer requirements, soil composition.
Fig. 1, Fig. 2, three schemas of Fig. 3 are compared as can be seen, and the present invention has saved and has easily gone wrong most in the chemical fertilizers production, the equipment concentration systems workshop section of complex and expensive the most, and technical process has been shortened almost half; In addition; though equally all be spray granulating in granulation process among Fig. 2 and Fig. 3; but spray granulating shown in Figure 2 is that straight fertilizer is added in the tablets press as returning charge; and the present invention in granulation process with thorough mixing in the liquid phase of each straight fertilizer in N-process; make the inside composition ratio of the compound fertilizer granules of producing even, suitable crop growth.
The invention has the advantages that and utilize existing slurry-spraying pelletizing equipment to open up a kind of new production composite fertilizer Method has been saved the Phosphoric Acid Concentration workshop section of complexity in the production, produces the product of uniform ingredients, technological process Simply, save the energy, improved productivity ratio, reduced the cost of product.
Claims (2)
1, a kind of method of producing composite fertilizer by liquor jetting pelletting, at first ore is made ore pulp after, join in the acid tank and react with sulfuric acid, generate phosphoric acid and calcium sulfate, then phosphoric acid and calcium sulfate filtering separation are obtained phosphoric acid; It is characterized in that: phosphoric acid, ammonia and straight fertilizer nitrogenous, potassium are joined in the neutralization reaction groove together carry out neutralization reaction, the mixed slurry that reacts completely carries out spray granulating, promptly gets composite fertilizer after the drying.
2, according to the method for the described producing composite fertilizer by liquor jetting pelletting of claim 1, it is characterized in that: wherein said straight fertilizer nitrogenous, potassium is ammonium chloride or ammonium sulfate and Repone K or the vitriolate of tartar mixture by arbitrary proportion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95104148 CN1062843C (en) | 1995-05-02 | 1995-05-02 | Method for producing composite fertilizer by liquor jetting pelletting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95104148 CN1062843C (en) | 1995-05-02 | 1995-05-02 | Method for producing composite fertilizer by liquor jetting pelletting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1134924A CN1134924A (en) | 1996-11-06 |
| CN1062843C true CN1062843C (en) | 2001-03-07 |
Family
ID=5075009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95104148 Expired - Fee Related CN1062843C (en) | 1995-05-02 | 1995-05-02 | Method for producing composite fertilizer by liquor jetting pelletting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1062843C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105254374A (en) * | 2015-11-25 | 2016-01-20 | 刘彬 | Method for producing chlorine-based guniting compound fertilizer |
| CN105294212A (en) * | 2015-11-25 | 2016-02-03 | 刘彬 | Chlorine-based gunited organic-inorganic fertilizer production method |
-
1995
- 1995-05-02 CN CN 95104148 patent/CN1062843C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1134924A (en) | 1996-11-06 |
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