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Special granulating agent for round granular phosphorus-potassium fertilizer, and application thereof

A technology of granulating agent and phosphorus-potassium fertilizer, applied in application, potash fertilizer, phosphorus fertilizer and other directions, can solve problems such as difficulty in granulating high-potassium compound fertilizer, and achieve the effect of saving film material, reducing coating cost and high particle strength

Inactive Publication Date: 2021-07-27
HUBEI FORBON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to add a special granulating agent to the potash fertilizer to prepare round granular phosphorus and potassium fertilizers, which solves the problem of difficult granulation of high-potassium compound fertilizers and enriches the categories of phosphorus and potassium fertilizers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0015] Add 85% of heavy superphosphate, 14% of attapulgite, and 1% of clay. Add the above three substances into a ball mill in sequence, grind and modify for 10 minutes, and obtain a granulating agent when the fineness of the material reaches 100 μm. Add potassium chloride with a fineness of 50-500 mesh and a granulating agent accounting for 5.5% of the mass ratio of potassium chloride into the mixer and mix evenly, then enter the 1m disc granulator to spray water for granulation, and the particles are dried and sieve to obtain round particle phosphorus and potassium fertilizer, the nutrient content of which is 0-2-56.

Embodiment example 2

[0017] 85% heavy superphosphate, 10% attapulgite, and 5% bentonite. Put the above three substances into a ball mill in turn, grind and modify for 30 minutes, and obtain a granulating agent when the material fineness reaches 10 μm. Add potassium sulfate with a fineness of 50-500 mesh and a granulating agent accounting for 10% of the mass ratio of potassium sulfate into the mixer and mix evenly, then enter the disc granulator to spray water for granulation, and the particles are dried and sieved , that is, round granular phosphorus and potassium fertilizers are obtained, and the nutrient content of the phosphorus and potassium fertilizers is 0-2-45.

Embodiment example 3

[0019] 10% heavy superphosphate, 40% attapulgite, and 50% clay. Put the above three substances into a ball mill in turn, grind and modify for 20 minutes. When the fineness of the material reaches 70 μm, the granulating agent is obtained. Add potassium sulfate with a fineness of 50-500 mesh and a granulating agent accounting for 20% of the mass ratio of potassium sulfate into the mixer and mix evenly, then enter the drum granulator to spray water for granulation, and the particles are dried and sieved. The round granular phosphorus and potassium fertilizer can be obtained, and the nutrient content of the phosphorus and potassium fertilizer is 0-1-40.

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Abstract

The invention discloses a special granulating agent for preparing a round granular phosphorus-potassium fertilizer, and application thereof. The granulating agent comprises, by mass, 10-90% of calcium superphosphate or triple superphosphate, 0-50% of attapulgite, 0-50% of bentonite and 0-50% of clay. The above substances are uniformly mixed, the mixture is ground and modified by a mill, the viscosity and specific gravity of powder are adjusted to obtain the granulating agent meeting the requirements. The granulating agent is added into potassium sulfate, potassium chloride or potassium nitrate, the adding amount of the granulating agent is 1-20% of the mass of potassium sulfate or potassium chloride, mixing is conducted, water spraying granulation is conducted, drying is conducted, and the round granular phosphorus-potassium fertilizer. The phosphorus-potassium fertilizer prepared by the method is high in particle strength and smooth in particle surface, is particularly suitable for being used as a raw material of a blended fertilizer or being independently used, can also be coated to prepare a sustained and controlled release phosphorus-potassium fertilizer, and has the advantages of saving a film material and reducing the coating cost.

Description

technical field [0001] The invention belongs to the technical field of chemical fertilizers, and in particular relates to a special granulating agent for the manufacture of round phosphorus and potassium fertilizers and an application thereof. Background technique [0002] With the development and promotion of blended fertilizers, the demand for high-phosphorus and high-potassium compound fertilizers is increasing. CN101525256B discloses a low-chlorine phosphorus-potassium fertilizer and a preparation method thereof, relating to a low-chlorine phosphorus-potassium fertilizer prepared by melting and sintering potassium chloride, phosphate rock powder, quartz sand or diatomaceous earth, insoluble potassium-containing rock ore, and anhydride. CN106748270A discloses a biological phosphorus and potassium fertilizer and a preparation method thereof. Rapeseed stalks and peat are dried and pulverized, phosphate rock, potassium ore and humic acid are respectively pulverized, and afte...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G5/12
CPCC05B1/02C05G3/00C05G5/12C05D1/02C05D9/00
Inventor 王仁宗聂响亮
Owner HUBEI FORBON TECH
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