Quick-acting slow-released compound fertilizer and preparation method thereof

A compound fertilizer and slow-release technology, applied in the direction of fertilizer form, fertilizer mixture, fertilization device, etc., can solve the problems of high cost of polymer inert film, secondary pollution of soil environment, and inability to release nutrients, so as to achieve a wide application range of crops, Reduce the effect of excessive release and save equipment investment

Inactive Publication Date: 2013-07-10
天津芦阳肥业股份有限公司
View PDF5 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic production of slow-release fertilizers is more common to coat the surface of fertilizer particles with an insoluble inert film to delay the dissolution and diffusion of fertilizers and achieve the purpose of slow-release, but the thickness of the film cannot be controlled, which leads to the inability of nutrients to grow according to crops Need to be released, some nutrients can't even be released
It causes the crops to defertilize in the early stage, and the growth of the seedlings is slow, which cannot guarantee the supply of nutrients throughout th

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Quick-acting slow-released compound fertilizer and preparation method thereof
  • Quick-acting slow-released compound fertilizer and preparation method thereof
  • Quick-acting slow-released compound fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] In the preparation method of the quick-acting slow-release compound fertilizer, in the production of the compound fertilizer by the granulation method, raw materials containing nitrate nitrogen, ammonium nitrogen, and amide nitrogen are added to the material, in order to prevent excessive nitric acid from being produced during the granulation process. Urea, the gaseous ammonia is directly passed into the material layer of the drum granulator to complete the ammonium treatment of ammonium nitrate, and granulate with urea and other powdery basic fertilizers containing nitrogen, phosphorus and potassium, and then dry after granulation , fine material sieving, ammonium nitrate phosphorus melt spraying, cooling, large material sieving, coating to obtain quick-acting slow-release compound fertilizer.

[0026] After the material is dried, the fine material is sieved, and the diameter of the sieve hole is between 2.0-3.0mm.

[0027] The ammonium nitrate is added in two parts, a...

Embodiment 1

[0034] To prepare high-nitrogen products with nitrogen, phosphorus and potassium content of 22-13-10, take the raw material consumption quota of 1 ton product as an example:

[0035]

[0036] Specific production process: Add 40 kg of gaseous ammonia (containing N82.3%, mass percentage, the same below) to the material layer of the drum granulator after metering, and add ammonium nitrate phosphorus (containing N30% , which contains 14.5% nitrate nitrogen, 15.5% ammonium nitrogen, P 2 o 5 6%) 135 kg, urea (containing N46.2%) 230 kg, powdered monoammonium phosphate (containing N10%, P 2 o 5 45%) 215 kg, general calcium (including P 2 o 5 17%) 127 kg, potassium chloride (containing K 2 O57%) 178 kg, the above-mentioned powdery material and gas ammonia are mixed and granulated in the granulator. The tail steam washing water supplements the liquid phase required for granulation. The temperature of the material in the drum granulator is controlled at 60°C. After 3 minutes of ...

Embodiment 2

[0037] Embodiment 2: prepare nitrogen, phosphorus, potassium content 20-10-20 high-potassium product, take 1 ton of product raw material consumption quota as example:

[0038]

[0039] Specific production process: Add 30 kg of gaseous ammonia (containing N82.3%, mass percentage, the same below) to the material layer of the drum granulator after metering, and add ammonium nitrate phosphorus (containing N30% , which contains 14.5% nitrate nitrogen, 15.5% ammonium nitrogen, P 2 o 5 6%) 120 kg, ammonium chloride (including N 25.2 ) 24 kg, urea (containing N 46.2 ) 198 kg, powdered monoammonium phosphate (containing N10%, P 2 o 5 45%) 196 kg, potassium chloride (contains K 2 O57%) 352 kg, the above-mentioned powdery material and gas ammonia are mixed and granulated in the granulator. The tail steam washing water supplements the liquid phase required for granulation. The temperature of the material in the drum granulator is controlled at 70°C. After 4 minutes of granulation...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a quick-acting slow-released compound fertilizer and a preparation method thereof. The preparation method comprises the following steps of: adding a raw material containing nitrate nitrogen, ammonium nitrogen and amidonitrogen to materials, directly introducing gas ammonia to a material layer of a rotor drum granulator to finish ammoniation of ammonium nitrate phosphorus, and controlling the mass of urea nitrate generated by reaction. According to effective proportioning, the contents of nitrogen in the quick-acting slow-released compound fertilizer are as follows in percentage by mass: 2-5 percent of nitrate nitrogen, 6-9 percent of ammonium nitrogen and 7-11 percent of amidonitrogen. The phosphorous and potassium nutrient content is determined according to proportioning of different products. The ammonium nitrate phosphorus, containing the nitrate nitrogen, as the raw material is added by in two parts, i.e., the ammonium nitrate phosphorus containing 1-3 percent of nitrate nitrogen is added into the material layer, and the rest of ammonium nitrate phosphorus containing 1-2 percent of nitrate nitrogen is added into a part which is 1-1.5m away from the inlet of a cooler; and the surfaces of fertilizer particles subjected to drying and fine screening are wrapped, so that the quick-acting slow-released compound fertilizer has available nitrogen shells. The slow-released nitrogen urea is added in a solid manner, used as master batch for granulation and wrapped layer by layer by other material layers of nutrients, so that the quick-acting slow-released compound fertilizer has slow-released kernels.

Description

technical field [0001] The invention belongs to the technical field of chemical fertilizers, and in particular relates to a quick-acting slow-release compound fertilizer and a preparation method thereof. Background technique [0002] At present, with the development of modern agriculture, the development of compound fertilizers at home and abroad has taken a leading role in the chemical fertilizer industry. In developed countries of the chemical fertilizer industry, the amount of compound fertilizers has accounted for 70%-80% of the amount of chemical fertilizers. However, long-term large-scale application of chemical fertilizers not only increases crop production, but also has a great negative impact on soil, crops and the environment. Studies have shown that conventional chemical fertilizers have a large amount of nutrients, concentrate and release quickly in the early stage of application, which will cause leaching, decomposition, Loss due to volatilization, and even redu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C05G1/00C05G5/00
Inventor 杨桂双杨金宝李云利杨长东
Owner 天津芦阳肥业股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap