Instant less-residue compound fertilizer and preparation method thereof

A compound fertilizer and slag-type technology, which is applied in the direction of urea compound fertilizer, inorganic fertilizer, ammonium salt fertilizer, etc., can solve the problems of low strength, incomplete dissolution, hardening, etc., and achieve the effect of high pelleting rate and excellent dissolution characteristics

Inactive Publication Date: 2015-05-20
湖北三得利肥业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the water-soluble fertilizers produced by domestic compound fertilizer manufacturers generally use high-purity industrial-grade raw materials, soluble fillers and binders in order to reduce the content of water-insoluble substances. The comprehensive application of these three technical means is to solve the problem. The product residue exceeds the standard, the product strength is not enough, it is easy to pulverize and harden, the product balling rate is low, and the production efficiency is low.
However, this will increase the manufacturing cost of water-soluble fertilizers, which will eventually be passed on to the farmers. Therefore, the ton price of water-soluble compound fertilizers on the market is generally above 5,000 yuan, and some are even as high as 8000 yuan
Moreover, in the pro

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1

[0019] 1) The monoammonium phosphate in the raw materials is subject to residue laboratory inspection, and the monoammonium phosphate with a residue content of less than 3% is included in the A category specifically for the production of instant low-residue compound fertilizer;

[0020] 2) Combine 21.5% by weight monoammonium phosphate, 33.5% by weight 60% white potassium, 9% by weight ammonium sulfate, 31.5% by weight 46.2% urea and 1% by weight medium and trace amounts The solubilizing additives are metered and crushed, and then collected into the feed port of the drum granulator, and 2% by weight of 99% liquid ammonia is passed into the nozzle of the granulator (buried under the material bed). The 98% sulfuric acid with a weight ratio of 1.5% is diluted to a concentration of 40%-60% and then sprayed into the granulator. The above three materials undergo acid reaction and ball formation in the drum granulator;

[0021] 3) The materials from the granulator are th...

Example Embodiment

[0023] Example 2

[0024] 1) The monoammonium phosphate in the raw materials is subject to residue laboratory inspection, and the monoammonium phosphate with a residue content of less than 3% is included in the A category specifically for the production of instant low-residue compound fertilizer;

[0025] 2) Combine 36% monoammonium phosphate by weight, 28.5% by weight 60% white potassium, 9% by weight ammonium sulfate, 22% by weight 46.2% urea, and 1% by weight medium and trace amounts The solubilizing additives, after being metered and crushed, are collected into the feed port of the drum granulator, and 2% by weight of 99% liquid ammonia is passed into the nozzle (buried under the material bed) in the granulator. The 98% sulfuric acid with a weight ratio of 1.5% is diluted to a concentration of 40%-60% and then sprayed into the granulator. The above three materials undergo acid reaction and ball formation in the drum granulator;

[0026] 3) The materials from the granulator are ...

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Abstract

The invention discloses an instant less-residue compound fertilizer and a preparation method thereof. The compound fertilizer comprises monoammonium phosphate, white potassium or potassium sulfate, urea, ammonium sulfate, concentrated sulfuric acid, liquid ammonia and medium/trace dissolution-aided additives. By using the self-made medium/trace dissolution-aided additives, the water soluble effect of the compound fertilizer and the clarity of aqueous solution are guaranteed, and the monoammonium phosphate raw material with less residue content is used, so that the compound fertilizer has the advantages that the residue rate can be maintained at 5 percent or below under the condition that industrially pure raw materials are not used, the compound fertilizer is prepared by utilizing an ammoniation process, and high conglomeration rate of 70-85 percent of the product can be guaranteed under the condition that a soluble filler and an adhesive are not added. Moreover, the problems such as hardening, pulverization, low strength and strength degradation of the product are solved, and high quality and low price can be really achieved.

Description

technical field [0001] The invention relates to an instant low-slag type compound fertilizer, in particular to a preparation method of an instant low-slag type compound fertilizer. Background technique [0002] Water-soluble fertilizer (Water Soluble Fertilizer, referred to as WSF), is a multi-component compound fertilizer that can be completely dissolved in water. It can be quickly dissolved in water and is more easily absorbed by crops. The key point is that it can be applied to sprinkler irrigation, drip irrigation and other facility agriculture to realize the integration of water and fertilizer, and achieve the efficiency of saving water, fertilizer and labor. Compared with traditional superphosphate and ordinary granular compound fertilizers, water-soluble fertilizers have obvious advantages. Its main features are less dosage, convenient use, low cost of use, fast absorption by crops, and high utilization rate of nutrients. In this way, people can completely design t...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05B7/00C05G3/00C05G5/12C05C3/00C05C9/00C05D1/02
Inventor 沈继军田红柱
Owner 湖北三得利肥业有限公司
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