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Production method of slow-release chelated compound fertilizer containing multiple elements

A technology of compound fertilizer and production method, applied in fertilizer mixture, fertilization device, application and other directions, can solve problems such as difficulty in granulating humic acid, and achieve the effects of low cost, improved density and strength, and high activity

Active Publication Date: 2014-03-12
PANJIN STRONG FERTILIZER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to provide a slow-release chelated compound fertilizer production method that improves the nutrient utilization rate of fertilizers, contains various trace elements and organic matter required for crop growth, and is environmentally friendly in the production and application process. Using the mixed solution of humic acid and sulfuric acid as the liquid phase required for granulation solves the problem of difficulty in granulation after adding a large amount of humic acid

Method used

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  • Production method of slow-release chelated compound fertilizer containing multiple elements

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Embodiment 1

[0048] Embodiment 1: 15%-10%-10% conventional products

[0049] Mix 90 kg of humic acid (mass percentage, the same below, containing 65% organic matter) in a mixing tank with water to make a humic acid solution with a mass percentage concentration of 40%, pump it into the tubular reactor after metering At the same time, 60 kg of concentrated sulfuric acid (containing S31.5%) with a concentration of 98% is pumped into the tubular reactor after metering to make a mixed solution of humic acid and sulfuric acid at about 85°C, and at the same time, it is metered into the 260 kg of urea (containing N46.2%), 183 kg of powdered monoammonium phosphate (containing N11%, P2O545%), potassium chloride (containing K 2O60%) 170 kg, ammonium chloride (containing N25.2%) 30 kg, ordinary calcium superphosphate (containing P2O517%, Ca10.5%) 110 kg, magnesium oxide (containing Mg60%) 40 kg, liquid sodium silicate (containing Si26%) 35 kg, zinc sulfate (containing S16.5%, Zn35%) 20 kg, the above ...

Embodiment 2

[0050] Embodiment 2: 12%-8%-20% high potassium product

[0051] Mix 80 kg of humic acid (mass percentage, the same below, containing 65% organic matter) in a mixing tank with water to make a humic acid solution with a mass percentage concentration of 40%, pump it into the tubular reactor after metering At the same time, 50 kg of concentrated sulfuric acid (containing S31.5%) with a concentration of 98% is pumped into the tubular reactor after metering to make a mixed solution of humic acid and sulfuric acid at about 80°C, and at the same time, it is metered into the 230 kg of urea (containing N46.2%), 140 kg of powdered monoammonium phosphate (containing N11%, P2O545%), 335 kg of potassium chloride (containing K2O60%), 100 kg of ordinary calcium superphosphate (containing P2O517%, Ca10 .5%), 30 kg of magnesium oxide (containing Mg60%), 30 kg of liquid sodium silicate (containing Si26%), 10 kg of zinc sulfate (containing S16.5%, Zn35%), the above materials are sprayed with the ...

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Abstract

The invention discloses a production method of a slow-release chelated compound fertilizer containing multiple elements. The method comprises the following steps of: preparing a humic acid solution and concentrated sulfuric acid into a humic acid-sulfuric acid mixed solution of 70-90 DEG C; spraying into a rotor drum granulator for granulating together with other powdery basic fertilizers containing nitrogen, phosphorus and potassium, substances which are rich in medium and trace elements, nutrients which can be adsorbed and fixed, and ingredients which can be used for forming a coating framework and an inner membrane shell; after granulating, enveloping with liquid sodium silicate, and drying, cooling, sieving and packing to obtain a nitrogen-phosphorus-potassium slow-release chelated compound fertilizer containing organic matters and medium and trace elements such as sulfur, zinc, calcium, magnesium and silicon. The liquid sodium silicate serving as an enveloping material is added in two parts, one part is directly added into the material layer of the rotor drum granulator to increase the granulating rate and form the inner membrane shell with the viscosity, and the other part is added into the outlet of the rotor drum granulator to envelop the surfaces of granulated fertilizer particles. The processes of material granulation and fertilizer particle enveloping are completed by using the rotor drum granulator, and curing treatment of a membrane body is completed by drying and cooling without adding any special enveloping equipment, so that a large quantity of equipment investments are reduced.

Description

technical field [0001] The invention relates to a production method of a compound fertilizer, in particular to a production method of a slow-release chelated compound fertilizer containing multiple elements. Background technique [0002] At present, with the development of modern agriculture, the development of compound fertilizers at home and abroad has dominated the chemical fertilizer industry. China's chemical fertilizer use ranks first in the world, while the utilization rate of chemical fertilizers in China is only 30%, while developed countries As high as 60%, the most important reason is that the nutrient release of domestic traditional chemical fertilizers is too fast, and the effective utilization rate of fertilizers is low. Long-term large-scale application of chemical fertilizers not only increases crop production, but also brings great negative impacts on soil, crops and the environment. Studies have shown that conventional chemical fertilizers concentrate a lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/08C05G3/80C05G3/90
Inventor 朱守军
Owner PANJIN STRONG FERTILIZER
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