Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of sulfur coated urea for rice

A technology for coating urea and rice with sulfur, which can be used in applications, fertilizer mixtures, fertilization devices, etc., and can solve the problems of low production cost and the like

Inactive Publication Date: 2012-12-26
汉枫缓释肥料(江苏)有限公司
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to overcome the deficiencies of the existing sulfur-coated urea production process for rice, provide a method to effectively solve the problem of floating sulfur-coated urea particles for rice, improve the fertilization effect of sulfur-coated urea, And the preparation method of sulfur-coated urea for rice with relatively low production cost

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: Coating the urea by passing large particles of urea through flowing molten sulfur, spraying molten paraffin, and then cooling to room temperature (the above is a conventional process). After the cooling process, add dolomite powder (CaO.MgO.2H 2 O), mixed and sieved by the drum sieve, the conditioner under the screen is returned to the addition port of the drum sieve by the screw feeder, according to the specifications of the sulfur-coated urea, and the addition and remaining amount of the conditioner are calculated to control the adsorption of the conditioner The amount is 2% of the weight of the sulfur-coated urea, and the oversize is the finished sulfur-coated urea.

Embodiment 2

[0008] Embodiment 2: The operation steps and method are the same as above, except that the addition of conditioning agent is diatomite, the particle size is 100 mesh, and the adsorption capacity is 1.2%.

Embodiment 3

[0009] Embodiment 3: The operation steps and method are the same as above, except that the addition of the conditioning agent is dolomite powder, the particle size is 105 mesh, and the adsorption capacity is 1.2%.

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

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Granularityaaaaaaaaaa
Login to View More

Abstract

The present invention discloses a preparation method of a sulfur coated urea for rice. According to the preparation method, large particle urea passes through flowing melting sulfur to achieve urea coating; then melting paraffin wax is sprayed, and cooling is performed to a room temperature; after cooling, a conditioning agent is added to the sulfur coated urea, wherein the conditioning agent is dolomite powder or diatomite, and is adsorbed on the surface of the sulfur coated urea particles, an absorption amount is 1.2-3% of the weight of the sulfur coated urea, and addition of the conditioning agent is performed inside a roller sieve; after mixing screening, the resulting material on the sieve is the finished product. The sulfur coated urea prepared by the method of the present invention has the following characteristics that: a surface structure of the sulfur coated urea particles is changed, diffusion speed of water on the surface of the sulfur coated urea particles is increased so as to rapidly sink in the water, a floatation problem of the existing sulfur coated urea is effectively solved, a fertilizer application is improved, production cost is relatively low, and product quality is not affected.

Description

technical field [0001] The invention relates to a method for preparing sulfur-coated urea for rice, belonging to the technical field of slow-release fertilizers. Background technique [0002] Sulfur-coated urea (SCU for short) is a coated slow-release nitrogen fertilizer. In the soil environment, urea gradually diffuses through the coating, mainly through cracks, small cavities and incomplete natural formation on the coating surface. The structure releases nutrients slowly. Sulfur-coated urea, as a kind of slow-release fertilizer, is increasingly widely used. Compared with ordinary quick-release fertilizers, it has the following advantages: improve fertilizer efficiency and high utilization rate; reduce water pollution and avoid soil compaction; reduce fertilization times and comprehensive costs; effectively reduce Salt index, improve the quality of work; sulfur is a medium element, which can provide nutrients for crops. At present, the production process of sulfur-coated ...

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): C05G3/08C05G3/90
Inventor 喻武远陈年军李天兵
Owner 汉枫缓释肥料(江苏)有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com