Silicic acid fertilizer and preparation technology thereof

Abstract

The invention relates to a silicic acid fertilizer and a preparation technology thereof. The content of silicic acid in the silicify fertilizer is higher than 10%, and the pH value of a saturation extract is lower than 6.5. The silicic acid fertilizer is prepared by the following steps: sodium silicate or material blocks containing calcium silicate are used as raw materials, raw materials are neutralized with acid, a silicic acid colloidal solution is prepared, a deposition treatment is carried out, after filtering, washing, neutralization, drying and crushing, a finished product is obtained. The prepared silicic acid fertilizer has the following characteristics: the silicic acid content is high; after the fertilizer is applied to fields, the soil does not cake and deteriorate; the fertilizer is long-term effective, wherein utilization rate of silica is 100%; the solubility is moderate and the fertilizer efficiency is high, and the fertilizer can be used as a base fertilizer and an additional fertilizer; outputs of crops can be greatly increased; the fertilizer can be prepared into a complex fertilizer with a nitrogenous fertilizer, a phosphate fertilizer, a potash fertilizer and other common fertilizers, and usage of the fertilizer is convenient; the preparation technology is simple, investment is low and production cost is low.

Description

technical field [0001] The invention belongs to the field of agricultural chemical fertilizers, and in particular relates to a silicic acid fertilizer and a preparation process thereof. Background technique [0002] As we all know, the body of plants contains a certain amount of silica, which is an important component of plant bodies. Plants need to continuously absorb silica from the surrounding environment during their growth. The silica absorbed by plants comes from silicic acid dissolved in soil moisture. Studies have shown that silica dissolved in natural water bodies actually exists in the form of silicic acid. The content of silicon dioxide in the soil is very high, but the silicon dioxide in the soil cannot be dissolved in water directly. The silicon dioxide can only be dissolved in water after hydration reaction with water to form silicic acid. The hydration reaction of silicon oxide is extremely slow, and the released silicic acid is very rare, so that the conten...

AI Technical Summary

Problems solved by technology

The current silicon fertilizers are all made of calcium silicate as an active ingredient, but the hydrolysis reaction of calcium silicate is a reversible reaction with a small equilibrium constant. The amount of silicic acid released by calcium silicate to the surrounding water body is very limited, and silicon Calcium silicate itself has strong hydraulic coagulation, and calcium silicate molecules will form a solid three-dimensional network structure after reacting with water molecules, so calcium silicate will gradually agglomerate and harden in water, losing its original hydrolytic activity. For this reason, the real effective utilization rate of the so-called "effective silicon dioxide" contained in calcium silicate is less than 10% of its actual content, which causes a lot of waste

Moreover, the existing silicon fertilizers with calcium silicate as active ingredients are alkaline and cannot be mixed with nitrogen fertilizers and phosphate fertilizers. Generally, they can only be used alone as base fertilizers.

And take silicic acid as the chemical fertilizer of active ingredient, there is no report yet