Production method of high-sulfur full-water-soluble nitrosulfur-based nitrogen fertilizer particles

Abstract

The invention discloses a production method of high-sulfur full-water-soluble nitrosulfur-based nitrogen fertilizer particles. The production method comprises the following steps: 1) concentrating ammonium nitrate into a 99% ammonium nitrate solution, and adding 44-58% by mass of the ammonium nitrate solution into a primary mixing tank; 2) adding 1-2% by mass of a thickness reducer, 2-4% by mass of a conditioner and 25-35% by mass of solid ammonium sulfate into the primary mixing tank, and performing full mixing while stirring; (3) allowing 13-20% by mass of solid ammonium sulfate, a return material obtained after finished product screening and a mixed slurry overflowing out of the primary mixing tank to enter a secondary mixing tank, and performing uniform mixing while strong stirring; and 4) continuously and strongly stirring the obtained slurry in a ternary mixing tank, carrying out shearing emulsification and sufficient grinding on the obtained slurry overflowing the mixing tank, allowing the ground slurry to overflow into a mechanical granulator, spraying the slurry by the granulator, and carrying out tower bottom roller air cooling, screening, secondary powder flow cooler cooling and DMPP spraying in a coating machine to obtain the non-caking, quick-acting, long-acting and full-water-soluble high-sulfur and high-ammonium nitrogen nitrosulfur-based nitrogen fertilizer.

Description

technical field [0001] The invention belongs to the technical field of chemical fertilizer production, and in particular relates to a production method of high-sulfur fully water-soluble nitro-nitrogen fertilizer granules. Background technique [0002] At present, domestic nitro fertilizers have high nitrate nitrogen content and low ammonium nitrogen content to meet the needs of plant growth, which will cause excessive nitrate nitrogen to cause nitrogen leaching loss, not only causing a large waste of nitrogen fertilizer, but also increasing Agricultural investment costs, but also lead to serious pollution of surface water and groundwater, resulting in eutrophication of water bodies, which seriously damages the ecological balance; while the low ammonium nitrogen leads to insufficient "stamina" of fertilizer efficiency during use, and there is a phenomenon of defertilization. Secondary topdressing is often required, which is especially obvious in field crops, so it is urgent ...

AI Technical Summary

Problems solved by technology

During the mixing process, the ammonium sulfate solid is only suspended in the ammonium nitrate melt, and cannot be organically combined to form a eutectic, resulting in a thick slurry during the production process, and the produced granular product has many heterogeneous particles, low strength, and is easy to Agglomeration and pulverization, unable to continue normal production, has become a difficult problem in the industry

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