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Production method and equipment for highly effective slow releasing compound fertilizer and product

The technology of compound fertilizer and production method, which is applied in the directions of urea compound fertilizer, fertilizer form, inorganic fertilizer, etc., can solve the problems of uneven heating and mixing of powdery materials, increased biuret content of fertilizers, and formation of microporous finished products, etc. Achieve the effect of eliminating top dressing process, long fertilizer effect period and short process

Inactive Publication Date: 2007-09-26
汉枫缓释肥料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is likely to cause the biuret content of the fertilizer to increase and affect the fertilizer efficiency
[0011] 2. Uneven heating and mixing of powdery materials are likely to cause air bubbles in the spray granulation process, forming micropores or breaking the finished product, which affects the quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take 560 kg of solid urea, melt it in the primary melting reactor at 135-145 ° C, add 133 kg of potassium chloride, 30 kg of dolomite powder, and 5 kg of zinc sulfate into the molten urine, and then transfer to the secondary melting reaction In the container, add 50 kg of urea-formaldehyde and 222 kg of monoammonium phosphate. The molten urine mixture is sprayed into the prilling tower through the top nozzle for granulation.

[0040] The product contains 30% nitrogen, including 2% urea-formaldehyde nitrogen, 10% phosphorus pentoxide, 6% potassium oxide, 21 Newton grain strength, 0.6% moisture, and slow-release nitrogen.

Embodiment 2

[0042] Take 503 kg of urea and melt it in the first-stage melting reactor at 135-145°C, then add 100 kg of ammonium nitrate and 200 kg of potassium chloride in sections to the molten urine; then transfer to the second-stage melting reactor, add and mix 178 kg of uniform powdered monoammonium phosphate, 1 kg of slow-release agent (cyanoquinone), and 18 kg of magnesium oxide are made into slurry in a melt mixing reactor, and the molten slurry enters the prilling tower for granulation through the nozzle on the top of the tower.

[0043] The product contains 28% nitrogen, 8% phosphorus pentoxide, 12% potassium oxide, 0.6% moisture, and a particle strength of 22 Newtons.

Embodiment 3

[0045]Take 450 kg of urea, melt it into a liquid state by steam at 135-145°C in a urea melter, then add 150 kg of ammonium chloride, 150 kg of ammonium sulfate, 248 kg of potassium chloride, slow-release agent (hydroquinone )2KG. The molten slurry enters the prilling tower through the nozzle for granulation.

[0046] The product has the advantages of combining quick-acting and long-acting effects, and it can be effective in a short time when used as top dressing.

[0047] The product contains 27% nitrogen, 15% potassium oxide, 0.55% moisture, and a particle strength of 18 Newtons.

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Abstract

The invention discloses a manufacturing method of high-effective slow-release composite fertilizer, which comprises the following steps: allocating raw material through one or more component of aquacare, ammonium nitrate, ammonium sulfate and ammonium chloride; heating to 60-180 deg.c; blending 15-40% N, 6-35% P2O5, 6-35% K2O and 0.1%-20% slow-release agent; spraying; graining.

Description

technical field [0001] The invention relates to granulation of compound fertilizers, and in particular discloses a production method, equipment and products of nitrogen, phosphorus and potassium-containing high-efficiency slow-release compound fertilizers. Background technique [0002] The compound fertilizer tower spray granulation process is the first melt granulation technology introduced by Norway NorskHydro company in the world, and it is a typical process that directly combines molten urine (that is, connected with the urea production system) with molten monoammonium phosphate, powder The UAP / UAPK urea-based compound fertilizer process with potassium chloride as the substrate. The molten urine solution or ammonium nitrate solution and the monoammonium phosphate melt are pumped to the mixing reactor at the top of the prilling tower, mixed with the preheated potassium chloride fine powder, and then passed through a bottom The rotating multi...

Claims

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Application Information

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IPC IPC(8): C05G3/08C05G3/00C05G5/00C05C9/00C05C1/00C05C3/00C05B7/00C05D1/02C05G3/90
Inventor 吕云峰
Owner 汉枫缓释肥料有限公司
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