Glass matrix type slow-release compound fertilizer and preparation method thereof

Abstract

The invention relates to a glass matrix type slow-release compound fertilizer and a preparation method thereof. The compound fertilizer is prepared from the following components in parts by mass: 10-30 parts of waste glass, 40-60 parts of calcium carbide, 1-30 parts of phosphate fertilizer, 0-30 parts of potash fertilizer, 0-10 parts of filler and 300-400 cubic meter of nitrogen per ton of fertilizer (standard atmospheric pressure). The glass matrix type slow-release compound fertilizer has the functions of regulating the pH value of soil and improving the acidified soil, and can decrease therelease rate of the fertilizer nutrients, increase the utilization ratio of the nutrients, reduce the fertilizer loss and relieve the environmental pressure caused by fertilizer application; and the glass matrix type slow-release compound fertilizer has favorable ecological environment benefits, and solves the problem that the element nitrogen can not be easily added into the existing glass fertilizer by directly synthesizing calcium nitride at high temperature.

Description

technical field [0001] The invention belongs to the technical field of slow / controlled release fertilizers in fertilizer science, in particular to a glass matrix type slow release compound fertilizer which is compounded and fused with glass matrix materials and mineral fertilizers and a preparation method thereof. Background technique [0002] Since the 1980s, controlled-release fertilizers have become a research hotspot for new fertilizers at home and abroad. At present, a variety of controlled-release fertilizers have been developed at home and abroad, including low-water-soluble organic nitrogen compounds, low-water-soluble inorganic compounds, and physical fertilizers. Barrier-controlled release fertilizers and carrier-type controlled-release fertilizers, etc. However, although the research on controlled-release fertilizers has made great progress, there are still many deficiencies, especially the complex production process, high production costs and the difficulty of ...

AI Technical Summary

Problems solved by technology

[0005] Another object of the present invention is to provide a method for preparing a glass-based slow-release compound fertilizer, which solves the problem that a large amount of heat energy is needed to melt (soften) the glass-based material during the processing and production of traditional glass-based fertilizers, and saves energy and power fee, reduce production cost