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Preparation method of multi-nutrition-containing sustained and controlled release round granular potash fertilizer

A round granule and multi-nutrient technology is applied in the field of preparation of multi-nutrient slow-controlled-release round granule potassium fertilizer, which can solve the problem of low overall utilization rate of potassium nutrient.

Inactive Publication Date: 2021-08-03
HUBEI FORBON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Elemental potassium fertilizer has good water solubility, and potassium can be quickly absorbed by crops. However, the overall utilization rate of potassium nutrients in my country is not high, and it is urgent to cooperate with other nutrients to achieve the effect of slow and controlled release, so as to improve the nutritional efficacy of potassium fertilizer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0027] Drum Potassium Sulfate + 2% Magnesium Oxide + 2% Zinc Oxide

[0028] 1) At the front end of the coating drum, 20 kg of phosphoric acid slag liquid, wherein the phosphoric acid weight percentage is 40%, is sprayed onto 1 ton of round granular potassium sulfate at a temperature of 40°C.

[0029] 2) At the middle end of the coating drum, add 43.8 kg of 200-mesh magnesium oxide and zinc oxide mixed powder, wherein the weight ratio of magnesium oxide to zinc oxide is 1:1.

[0030] 3). At the end of the coating drum, spray 30 kg of phosphoric acid slag liquid, wherein the phosphoric acid weight percentage is 40%, that is, the slow and controlled release round granular potassium sulfate containing 2% magnesium oxide+2% zinc oxide.

[0031] Bury 100g of fertilizer into 20kg of soil, add 1000ml of water and place it in a constant temperature and humidity box, set the temperature at 25°C, and the humidity at 70% to observe the melting speed of the fertilizer.

[0032] ...

Embodiment example 2

[0037] Drum Potassium Chloride + 1% Manganese Oxide + 2% Zinc Oxide

[0038] 1) At the front end of the coating drum, 20 kg of phosphoric acid slag liquid, wherein the phosphoric acid weight percentage is 40%, is sprayed onto 1 ton of round granular potassium chloride at a temperature of 30°C.

[0039] 2) Add 32.2 kg of 200-mesh mixed powder of manganese oxide and zinc oxide to the middle end of the coating drum, wherein the weight ratio of manganese oxide and zinc oxide is 1:2.

[0040] 3). At the end of the coating drum, spray 20 kg of phosphoric acid slag liquid, wherein the phosphoric acid weight percentage is 40%, that is, slow-controlled release round particle potassium sulfate containing 1% manganese oxide+2% zinc oxide.

[0041] Bury 100g of fertilizer into 20kg of soil, add 1000ml of water and place it in a constant temperature and humidity box, set the temperature at 25°C, and the humidity at 70% to observe the melting speed of the fertilizer.

[0042] pr...

Embodiment example 3

[0047] Drum Potassium Sulfate + 3% Magnesium Oxide + 3% Zinc Oxide + 3% Copper Oxide

[0048] 1) At the front end of the coating drum, 10 kg of phosphoric acid slag liquid, wherein the phosphoric acid weight percentage is 75%, is sprayed onto 1 ton of round particle potassium sulfate at a temperature of 80°C.

[0049] 2) At the middle end of the coating drum, add 100 kg of 500-mesh mixed powder of magnesium oxide, zinc oxide and copper oxide, wherein the weight ratio of magnesium oxide, zinc oxide and copper oxide is 1:1:1.

[0050] 3). At the end of the coating drum, spray 10 kg of phosphoric acid slag liquid, wherein the weight percentage of phosphoric acid is 75%, that is, a slow-controlled release containing 3% magnesium oxide + 3% zinc oxide + 3% copper oxide Potassium sulfate in round particles.

[0051] Bury 100g of fertilizer into 20kg of soil, add 1000ml of water and place it in a constant temperature and humidity box, set the temperature at 25°C, and the humidity at...

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PUM

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Abstract

The invention relates to a preparation method of a multi-nutrition-containing sustained and controlled release round granular potash fertilizer, which is characterized by comprising the following steps: (1) spraying a layer of coating liquid on a round granular potash fertilizer at 0-80 DEG C at the front end of a coating roller, wherein the coating liquid is phosphoric acid sludge liquid, and the weight percentage of phosphoric acid in the phosphoric acid sludge liquid is 20-75%; (2) spraying a layer of nutrient powder rich in multiple nutrient elements at the middle end of the coating roller, and grinding the nutrient powder to 100-500 meshes; and (3) spraying a layer of coating liquid at the tail end of the coating roller to prepare the multi-nutrition-containing sustained and controlled release round granular potash fertilizer. The method has the advantages that 1, the method is simple and rapid; 2, material returning is avoided; 3, flexibility is achieved; and 4, the anti-caking and slow-release functions are achieved.

Description

technical field [0001] The invention relates to a preparation method of multi-nutrient slow-controlled release round particle potassium fertilizer, which belongs to the field of fertilizer manufacturing. Background technique [0002] China is a large agricultural country, and various fertilizers, especially chemical fertilizers, have made an indelible contribution to my country's food security. [0003] In the past 20 years, China's grain has increased year by year, but the quality of agricultural products has declined year by year, and the growth rate of total grain output has dropped significantly in the past 5 years. The reason is that my country's agricultural experts, fertilizer experts, planting experts, and soil experts agree that the cause The reason for the slow increase in the output of agricultural products and the decline in grain quality is that the soil nutrients are out of balance. The current agriculture is overly dependent on the macronutrients nitrogen, phos...

Claims

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Application Information

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IPC IPC(8): C05G3/30C05G3/40C05G5/12C05G5/30
CPCC05B17/00C05G3/30C05G3/40C05G5/12C05G5/30C05D1/02C05D5/00C05D9/02
Inventor 王仁宗肖作武
Owner HUBEI FORBON TECH