Preparation method of high-hardness water-resistant modified potassium fulvic acid powder

Abstract

The invention discloses a preparation method of high-hardness water-resistant modified potassium fulvic acid powder. The preparation method comprises the following steps of: with potassium fulvic acid dry powder as a main raw material, feeding the potassium fulvic acid dry powder into a sulfonating tower by a feeder through a sulfonating process, wherein the feeder, an air blower, the sulfonating tower and a bag packing machine are connected to form a production line; atomizing a sulfonating agent and feeding the atomized sulfonating agent into the sulfonating tower by the air blower; and carrying out sulfonating treatment for 2-5 seconds in the tower to prepare the high-hardness water-resistant modified potassium fulvic acid finished product, and conveying the finished product into the bag packing machine for bagging and packing, wherein the proportion of the sulfonating agent to the potassium fulvic acid dry powder is (1%-3%):100%, the sulfonating agent is sulfur trioxide, the fulvic acid content of the finished product is 46%-55%, the water solubility is 96%-98% and the condensation limit is 18-20. The finished product can be used as a leaf fertilizer, a drip fertilizer, a humic acid micro fertilizer, a plant biological regulator or a feed additive. Besides, the finished product prepared by the preparation method disclosed by the invention is high in physiological activity, good in water solubility and stability, extremely high in condensation limit, wide in application range, and easy to transport and store.

Description

technical field [0001] The invention relates to a potassium fertilizer production process, in particular to a production process of ore-derived potassium fulvic acid. Background technique [0002] Potassium fulvic acid powder is an excellent potassium fertilizer with multiple functions, which is made by extracting fulvic acid. There are two main sources of fulvic acid, one is extracted from straw and other crops through biological fermentation, called biochemical fulvic acid; the other is extracted from minerals rich in fulvic acid, called mineral-derived fulvic acid . Biochemical fulvic acid has high biological activity, but it is easy to decarboxylate and lose its activity during the concentration process, so it is only suitable for liquid form, and it is very inconvenient to transport and use. Mineral-derived fulvic acid has a complete chemical structure, many cavities, and a large exchange capacity, but it is not resistant to hard water, which brings many problems to ...

AI Technical Summary

Problems solved by technology

Biochemical fulvic acid has high biological activity, but it is easy to decarboxylate and lose its activity during the concentration process, so it is only suitable for liquid form, and it is very inconvenient to transport and use

Mineral-derived fulvic acid has a complete chemical structure, many holes, and a large exchange capacity, but it is not resistant to hard water, which brings many problems to field use

Although the newly developed high-water-soluble potassium fulvic acid dry powder solves the problems of inconvenient storage and transportation, the coagulation limit is still not up to the use requirements of high hard water environment, and the content of fulvic acid and water solubility need to be further improved.