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Method for producing calcium-magnesium-sulfur coated slow release fertilizer

A production method, sulfur coating technology, applied in the direction of nitrogen fertilizer, fertilization equipment, fertilizer mixture, etc., can solve the problems of high cost, complex production process, soil pollution by coating controlled release fertilizer, etc., to increase nutrition, increase trace elements, Effect of reducing soil and environmental pollution

Inactive Publication Date: 2009-11-11
李保华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a calcium-magnesium-sulfur-coated controlled-release fertilizer that is pollution-free, low-cost, and simple in the production process, aiming at the deficiencies of existing coated controlled-release fertilizers such as polluted soil, high cost, and complicated production process. production method

Method used

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Embodiment Construction

[0012] The present invention will be further described in detail below in conjunction with specific embodiments:

[0013] A method for producing calcium-magnesium-sulfur coated controlled-release fertilizer, which is characterized in that: putting urea fertilizer in a drum, stirring and rotating; mixing gypsum powder and water into a liquid, and the mixing ratio of said gypsum powder and water is 1 : Between 5 and 1:10, high-pressure spray spraying of fertilizer, the gypsum powder contains calcium hydroxide, calcium sulfate, magnesium oxide; or after high-pressure spray spraying of fertilizer, then spray the degradable plastic phas solution The said degradable plastic phas is a natural oxygen-containing oleic acid polymer, containing hydroxybutyric acid and hydroxyvaleric acid, the melting temperature is 180 degrees, the decomposition temperature is above 200 degrees, the crystallinity is 50-80%, and the molecular mass is 100-800κDa; drying or air drying the sprayed fertilizer.

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Abstract

The invention discloses a method for producing a calcium-magnesium-sulfur coated slow release fertilizer, which is characterized by comprising the following steps: placing urea fertilizer in a rotary drum for stirring and rotating; mixing plaster powder and water to prepare liquid and spraying the liquid onto the fertilizer in form of high-pressure fog; and kiln drying or air drying the fertilizer obtained after spray. After the plaster powder and the water are mixed into the liquid and the liquid is sprayed onto the fertilizer in form of high-pressure fog, plastic degrading phas solution is sprayed onto the fertilizer. The calcium-magnesium-sulfur coated slow release fertilizer can increase microelements needed by crops effectively as well as nutrients. The calcium-magnesium-sulfur coated slow release fertilizer avoids producing nondegradable particulate materials and effectively reduces soil and environmental pollution. The calcium-magnesium-sulfur coated slow release fertilizer has the functions of loosening soil, sterilizing, adjusting the pH value of soil, and the like.

Description

Technical field [0001] The invention relates to a mixture of one or more fertilizers and non-special fertilizer effect components, in particular to a production method of a calcium-magnesium-sulfur coated controlled-release fertilizer. Background technique [0002] The coating of the existing coated controlled-release fertilizer is difficult to decompose in the natural environment, and many coated particles are scattered in the soil and the natural environment, destroying the soil structure and causing pollution to the soil and the environment. [0003] Announcement number: CN1800117, announcement date: 2006.07.12, the Chinese patent document published "a method for producing polymer-coated controlled-release fertilizer", the invention is to heat and dissolve polymer materials in an organic solvent to form a coating liquid. Then, the coating liquid is sprayed on the surface of the fertilizer and dried to obtain a polymer-coated controlled-release fertilizer, wherein the organic s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/08C05G3/04C05C9/00C05G3/80C05G3/90
Inventor 李保华王德民栾峰李宪义
Owner 李保华
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