Granular humic acid water-soluble fertilizer and preparation method thereof

Abstract

The invention discloses a granular humic acid water-soluble fertilizer. The fertilizer water-soluble is composed of the following raw materials in parts by weight: 50-55 parts of water, 10-11 parts oflignite humic acid powder, 25-35 parts of urea, 7-9 parts of ammonium dihydrogen phosphate, 0.5-1 part of ethylene diamine tetraacetic acid-Ca (EDTA-Ca), 0.5-1 part of EDTA-Mg, 1.5-2 parts of EDTA-Fe, 0.5-1 part of EDTA-Zn, 0.2-0.5 part of EDTA-Cu, 0.5-1 part of EDTA-Mn, 0.2-0.5 part of sodium octaborate tetrahydrate, 0.02-0.05 part of ammonium molybdate, 0.5-1 part of potassium humate, 0.2-0.5 part of glycerol, 0.02 part of xanthan gum and 0.02 part of sodium dodecyl benzene sulfonate. The preparation method comprises the following steps: (1) weighing the raw materials according to the formula ratio, sequentially pouring the weighed raw materials into a container, and carrying out stirring for 20-25 minutes; and (2) grinding the uniformly dispersed-phase mixed solution prepared in the step (1) through a grinding machine with balls in a cylinder chamber, wherein the grinding condition is as follows that the liquid pressure in the machine cylinder is 0.2-0.3 bar, the linear velocity ofa rotor is larger than 10 m/s, the mesh sieve diameter is smaller than 0.2 mm, and the flow rate of the mixed liquid is less than 700 m<3>/h. A black slightly thick liquid obtained after the mixed liquid is ground by the grinding machine is a finished product of the fertilizer.

Description

technical field [0001] The invention belongs to the technical field of humic acid preparation, in particular to a particulate humic acid water-soluble fertilizer and a preparation method. Background technique [0002] Humic acid is the remains of animals and plants, mainly plant remains, a type of organic matter formed and accumulated through a series of processes of microbial decomposition and transformation as well as geophysics and chemistry. The application of humic acid in agricultural production can promote crop growth, increase yield, improve the quality of agricultural products, improve the utilization rate of other chemical fertilizers, and improve the soil. Humic acid widely exists in soil, rivers, lakes, oceans, peat, lignite, and weathered coal. It can be divided into soil humic acid, water humic acid and coal humic acid. Although the total amount of humic acid in soil and water is large, its average content is less than one percent, while the content of humic ...

AI Technical Summary

Problems solved by technology

[0004] However, the core problem of the existing humic acid water-soluble fertilizers is that the humic acid particles are large and the water solubility is poor, which is not conducive to the use of drip irrigation, sprinkler irrigation and spraying equipment in t...