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Method for preparing water-soluble humic acid nitrogen and potassium fertilizer by using lignite

A humic acid nitrogen and humic acid potassium technology, applied in the agricultural field, can solve the problems of cumbersome process and high production cost, and achieve the effect of simple production process, low production cost and easy operation

Inactive Publication Date: 2012-09-19
KUNMING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, humic acid fertilizers were usually used by chemically reacting humic acid before adding other elements. This fertilizer contains black humic acid, brown humic acid and fulvic acid separated from humic acid. Potassium oxide is reacted to obtain a potassium fulvic acid fertilizer solution, which is then concentrated, dried, and powdered to be used as a fertilizer additive or applied directly. This method is cumbersome and has high production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: 420 kg of lignite with a humic acid content of 30% is crushed to 200 mesh, and 1% potassium hydroxide with a purity of 99.9% is added, namely 4.2 kg, fully stirred for 10 to 20 minutes, mixed evenly, Store for 7-10 days, control the water content at 30-35%, add 250 kg of potassium chloride, 80 kg of urea and 250 kg of potassium chloride, stir, mix evenly, and granulate to obtain the finished product - potassium chloride humic acid Nitrogen-like potassium fertilizer, nitrogen: phosphorus: potassium = 10:0:15, humic acid ≥ 12%, total nutrient ≥ 25%.

Embodiment 2

[0017] Embodiment 2: 415 kg of lignite containing 40% of humic acid is pulverized to 200 mesh, and 9.3 kg of potassium hydroxide 2% with a purity of 99.9% is added, fully stirred for 10 to 20 minutes, mixed evenly, and the moisture is controlled at 30 ~35%, sealed and stored for 7-10 days before use, add 160 kg of urea, 125 kg of ammonium sulfate and 300 kg of potassium sulfate, stir, mix evenly, and granulate to get the finished product - potassium sulfate type fulvic acid nitrogen potassium fertilizer, Nitrogen: phosphorus: potassium = 10:0:15, humic acid ≥ 16%, total nutrient ≥ 25%.

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Abstract

The invention discloses a method for preparing a water-soluble humic acid nitrogen and potassium fertilizer by using lignite. The method comprises the following specific steps of: crushing the lignite to be over 100-mesh; adding 1-3 percent of potassium hydroxide with purity of 99.9 percent; stirring for 10-20 minutes; uniformly mixing; controlling moisture to be 30-35 percent; hermetically piling for 7-10 days to obtain potassium humate; adding a nitrogen fertilizer and a potassium fertilizer into the potassium humate according to the proportion of nitrogen to phosphorus to potassium of 10:0:15; keeping the content of humic acid over 10 percent; stirring; uniformly mixing; and granulating to obtain a finished product, wherein the total nutrient is not less than 25 percent. The method for preparing the water-soluble humic acid nitrogen and potassium fertilizer has the advantages of simple steps, easiness in operation, rich raw materials, low cost and good economic benefit.

Description

[0001] technical field [0002] The invention belongs to the technical field of agriculture, and in particular relates to a preparation method of water-soluble humic acid nitrogen and potassium fertilizer. Background technique [0003] Water-soluble humic acid nitrogen and potassium fertilizer, the fulvic acid contained in it can speed up the movement of phosphate fertilizer, absorb and store potassium ions, enhance chemical combination, adsorption, and chelation. Utilization efficiency, improve the absorption of nitrogen and potassium by crops, and reduce the loss of elements. In the past, humic acid fertilizers were usually used by chemically reacting humic acid before adding other elements. This fertilizer contains black humic acid, brown humic acid and fulvic acid separated from humic acid. Potassium oxide is reacted to obtain a potassium fulvic acid fertilizer solution, which is then concentrated, dried, and powdered to be used as a fertilizer additive or applied direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 桂腾飞徐胜光
Owner KUNMING UNIV
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