Method of producing rice fertilizer

A production method and rice technology, applied in the direction of nitrogen fertilizer, fertilizer form, fertilization device, etc., can solve the problem of low production cost

Inactive Publication Date: 2007-09-12
汉枫缓释肥料(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing SCU rice fertilizer production process, provide a rice fertili

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0008] Example 1: Large particles of urea are passed through flowing molten sulfur to coat the urea, and then molten paraffin is sprayed, and then cooled to room temperature (the above is a conventional process). After the cooling process, the dolomite powder (CaO.MgO.2H 2 O). After mixing and sieving through the trommel screen, the conditioner under the sieve is returned from the screw feeder to the addition port of the trommel screen. According to the specifications of SCU, the addition amount and remaining amount of the conditioning agent are calculated, and the adsorption amount of the conditioning agent is controlled as rice 2.0% of the weight of the fertilizer, the sieve is the finished rice fertilizer.

Example Embodiment

[0009] Example 2: The operation steps and methods are the same as above, except that the conditioning agent is diatomaceous earth, the particle size is 90 mesh, and the adsorption capacity is 1.5%.

Example Embodiment

[0010] Example 3: The operation steps and methods are the same as above, except that the conditioning agent is dolomite powder, the particle size is 100 mesh, and the adsorption capacity is 1.5%.

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PUM

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Abstract

This invention discloses a production method for rice fertilizers , namely a production method for SCU, in which, large grains of urea pass through flowing melt sulfur to realize coating to urea, then melt olefin is sprayed to it to be cooled to room temperature , then a conditioner is added to the rice fertilizer, and the conditioner is dolomite powder or diatomite adsorbed on the surface of the rice fertilizer grain in the 1.5-2.5% volume of the weight of the rice fertilizer, the conditioner is added in a roller screen, in which, substances on the screen are finished products and conditioners below the screen is fed back to the feeding port by a screw feed machine, the rice fertilizer processed by this method alters surface structure of SCU grains and increases spreading speed of water on the grain surface.

Description

technical field [0001] The invention relates to a method for producing rice fertilizer, namely a method for producing sulfur-coated urea, 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 that was first developed by the Tennessee Valley Authority (TVA) National Fertilizer Center (NFDC) in 1961 and officially commercialized in 1967. It generally contains 37 nitrogen %, containing 19% sulfur. In the soil environment, urea gradually diffuses through the coating, and slowly releases nutrients mainly through cracks, small cavities and incomplete structures naturally formed on the surface of the coating. As a rice fertilizer, SCU is widely used. Compared with ordinary quick-release fertilizers, SCU has the following advantages: improving fertilizer efficiency and high utilization rate; reducing water pollution and avoiding soil compaction; reducing fertilizati...

Claims

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Application Information

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IPC IPC(8): C05G3/08C05G3/00C05G5/00C05C9/00C05G3/90
Inventor 李金凯许进袁华
Owner 汉枫缓释肥料(江苏)有限公司
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