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High nitrogen sulfur base nitrogen phosphorus potassium slow release composite fertilizer and its production method

A nitrogen-phosphorus-potassium and compound fertilizer technology, applied in the field of compound fertilizers, can solve the problems that nutrients cannot be adjusted, the nitrogen ratio cannot be increased, fertilizers are easily lost, etc. Effect

Active Publication Date: 2007-04-18
ANHUI SIERTE FERTILIZER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the shortcomings of current domestic sulfur-based nitrogen, phosphorus and potassium compound fertilizers that the nutrients cannot be adjusted, the ratio of nitrogen cannot be increased, and the fertilizer is easy to lose, etc., the present invention adopts a potassium chloride low-temperature conversion method using dilute phosphoric acid as one of the raw materials according to the characteristics of the crops and the nutrient requirements. Combined with drum granulation production process, new cooling system nitrogen replenishment process and fertilizer anti-caking, coating slow-release technology, a high-nitrogen sulfur-based NPK slow-release compound fertilizer and its production method are provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Production of high-nitrogen-sulfur-based NPK compound fertilizer: S 18 -N 16 -P 15 -K 13 , (wherein N≥16%, S≥12%, CL - <3%, N, P, K single nutrient ±0.5)

[0035] Pick

[0036] 98% sulfuric acid 0.560t

[0037] 100%P 2 o 5 Phosphoric acid 0.153t——(using 26% dilute phosphoric acid, which contains 100% P 2 o 5 )

[0038] 60%K 2 O Potassium chloride 0.214t——(referring to containing 60% K in pure potassium chloride 2 O)

[0039] 99.5% liquid ammonia 0.134t

[0040] 38% N urea formaldehyde 0.106t——(urea formaldehyde contains 38% N)

[0041] 10-50-0 ammonium phosphate /

[0042] 46% N urea 0.044t (for coating) --- (refers to 46% N in urea)

[0043] Anticaking agent 0.001t

[0044] The above are the raw materials needed to produce one ton of compound fertilizer

[0045] Excessive 98% concentrated sulfuric acid is used to decompose potassium chloride at a relatively low temperature (130°C) to obtain potassium bisulfate solution, which is mixed with 26% dilute ...

Embodiment 2

[0048] Production of high-nitrogen, sulfur-based NPK slow-release compound fertilizer: S 15 -N 17 -P 14 -K 14 , N+P 2 o 5 +K 2 O≥45% (of which N≥16%, S≥12%, CL - <3%, N, P, K single nutrient ±0.5)

[0049] Pick

[0050] 98% sulfuric acid 0.460t

[0051] 100%P 2 o 5 Phosphoric acid 0.126t

[0052] 60%K 2 O potassium chloride 0.236t

[0053] 99.5% liquid ammonia 0.111t

[0054] 38% N urea formaldehyde 0.168t

[0055] 10-50-0 ammonium phosphate 0.028t

[0056] 46% N urea 0.044t

[0057] Anticaking agent 0.001t

[0058] The above are the raw materials needed to produce one ton of compound fertilizer

[0059] According to the above process route, three times of chemical synthesis, one time of nitrogen supplementation, one time of spraying anti-caking agent, and the finished product is obtained after metering and packaging.

Embodiment 3

[0061] Production of high-nitrogen-sulfur-based NPK compound fertilizer: S 11 -N 19 -P 14 -K 13 , N+P 2 o 5 +K 2 O≥45% (of which N≥16%, CL - <3%, N, P, K single nutrient ±0.5)

[0062] Pick

[0063] 98% sulfuric acid 0.330t

[0064] 100%P 2 o 5 Phosphoric acid 0.090t

[0065] 60%K 2 O potassium chloride 0.226t

[0066] 99.5% liquid ammonia 0.079t

[0067] 38% N urea formaldehyde 0.256t

[0068] 10-50-0 ammonium phosphate 0.100t

[0069] 46% N urea 0.044t

[0070] Anticaking agent 0.001t

[0071] The above are the raw materials needed to produce one ton of compound fertilizer

[0072] According to the above process route, three times of chemical synthesis, one time of nitrogen supplementation, one time of spraying anti-caking agent, and the finished product is obtained after metering and packaging.

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Abstract

The present invention relates to a new-type high-nitrogen thioyl nitrogen-phosphorus-potassium slowly-released complex fertilizer and its production method. It is characterized by that it includes a base body of thioyl nitrogen-phosphorus-potassium complex fertilizer made up by using concentrated sulfuric acid, dilute phosphoric acid, potassium nitride and liquid ammonia, in said base body the urea-formaldehyde is contained, the external surface of said thioyl nitrogen-phosphorus-potassium complex fertilizer is covered with a layer of urea layer, and the urea layer exterior is covered with a layer of complex fertilizer anticaking agent.

Description

technical field [0001] The invention relates to a compound fertilizer, in particular to a novel high-nitrogen, sulfur-based, nitrogen, phosphorus, and potassium slow-release compound fertilizer with a nitrogen content of more than 15 percent and flexible adjustment of nutrients. Background technique [0002] Sulfur-based nitrogen, phosphorus and potassium compound fertilizer is one of the technical factors for improving soil structure and crop quality in recent years. It is a new type of chemical fertilizer with broad market prospects. It is especially suitable for chlorine-avoiding economic crops such as tobacco leaves, melons, fruits, and vegetables, increasing production and improving effects. significantly. [0003] At present, there are mainly the following ways to produce sulfur-based NPK compound fertilizers in China: [0004] One is the sulfur-based nitrogen, phosphorus and potassium compound fertilizer produced by using solid potassium sulfate, ammonium sulfate, mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05G5/00
Inventor 金国清
Owner ANHUI SIERTE FERTILIZER IND
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