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Envelope sustained-release fertilizer containing organic matter double-layer coating and preparation technology of envelope sustained-release fertilizer

A technology of controlled release fertilizer and preparation process, applied in the field of slow and controlled release fertilizer, can solve the problems of slow fertilizer effect, high cost of coating material, and high price of slow and controlled release fertilizer, and achieves advantages in price, strong slow release and structure. good effect

Inactive Publication Date: 2018-03-16
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the price of slow-release and controlled-release fertilizers is high, and the fertilizer effect is too slow. The main reason is that the cost of coating materials is high. The control of fertilizer efficiency only emphasizes the inhibition of nutrient release, and has not yet achieved two-way regulation of accelerated release and slow release.

Method used

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  • Envelope sustained-release fertilizer containing organic matter double-layer coating and preparation technology of envelope sustained-release fertilizer
  • Envelope sustained-release fertilizer containing organic matter double-layer coating and preparation technology of envelope sustained-release fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 230g of urea (particle size between 2mm-3mm), pour it into BY-300 coating machine, spray 10mL of internal binder: 8% polyvinyl alcohol solution on the rotating urea with spray gun, Add a small amount of 40g fermented distiller's grains for many times-slightly shake and put into the sample sieve of the material, so that the material powder is evenly scattered on the surface of the rotating wet urea particles, and is adhered by the binder on the surface of the urea particles. When the surface of the urea particles is no longer wet, spray the external binder and add wrapping materials. This is repeated several times until the binder and lees are all used up. After the coating process is completed, take out the coated urea particles.

[0035] Control the coating temperature at 60-80°C, mix 9g of rosin and 6g of paraffin, add to the coating drum to melt. Then put the urea that has wrapped the inner coating material layer into the coating drum, and add a certain amount of...

Embodiment 2

[0038] Take 220g of urea (2mm-3mm), pour it into BY-300 coating machine, spray the inner binder in the form of mist with a spray gun on the rotating urea: 10mL of 8% polyvinyl alcohol solution, add 40g in small amounts several times Fermented distiller's grains: Slightly shake the sample sieve into the material, so that the material powder is evenly scattered on the surface of the rotating wet urea particles, and is adhered by the binder on the surface of the urea particles. When it is rotated, the surface of the urea particles is no longer wet. After the coating is completed, take out the urea particles.

[0039] Control the coating temperature at 60-80°C, mix 9g of rosin and 6g of paraffin, add to the coating drum to melt. Then put the urea wrapped in the inner film into the coating drum, and add a certain amount of outer film material: 180g oyster powder, stir evenly, turn off the heating, and then turn on the speed button to start the coating drum. Rotate, and after 40-50 mi...

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Abstract

The invention provides an envelope sustained-release fertilizer containing an organic matter double-layer coating and a preparation technology of the envelope sustained-release fertilizer. The fertilizer comprises a spherical fertilizer core, an inner binder layer, an inner envelope material layer, an outer binder layer and an outer envelope material layer, wherein the inner binder layer is made of a polyvinyl alcohol material and covers the outer surface of the fertilizer core; the inner envelope material layer is made of a vinasse material, and covers the inner envelope material layer; the outer binder layer is made of a mixture of rosin and paraffin, and covers the outer surface of the inner envelope material layer; and the outer envelope material layer is made of oyster powder, and covers the outer envelope material layer. According to the envelope sustained-release fertilizer provided by the invention, the organic matters such as oyster powder and vinasse are taken as envelope materials, and the envelope fertilizer with good structure, favorable price and high sustained release performance can be formed through spray gun pelleting and drum pelleting.

Description

Technical field [0001] The invention relates to the technical field of slow and controlled release fertilizers, in particular to a coated slow and controlled release fertilizer containing an organic double-layer film and a preparation process thereof. Background technique [0002] At present, the main reason for the high price of slow and controlled release fertilizers and the slow fertilizer effect is the high cost of coating materials. The fertilizer efficiency control only emphasizes the suppression of nutrient release, and the two-way adjustment of accelerated release and slow release has not been achieved. The choice of controlled-release materials should be considered from the three aspects of price, environment, and controlled-release effect. Materials with good controlled-release effect, cheap and easy to obtain, no or small impact on the environment, should be selected, taking into account fertilizer benefits, crop economic benefits and the environment benefit. Therefor...

Claims

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Application Information

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IPC IPC(8): C05G5/00C05G3/00C05G3/08C05G3/90
CPCC05C9/00C05G3/90C05G5/30C05G5/12C05F1/005C05F5/008
Inventor 张旭博孙志刚张崇玉
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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