A kind of production method of high-sulfur fully water-soluble nitrate-sulfur-based nitrogen fertilizer granules

Abstract

The invention discloses a production method of high-sulfur all-water-soluble nitrosulfur-based nitrogen fertilizer granules. The production method comprises steps: 1) ammonium nitrate is concentrated into 99% ammonium nitrate solution, and the ammonium nitrate solution accounting for 44-58% of the total mass ratio is metered into a primary mixing tank; Account for mass total ratio of 1-2% thickening agent, 2-4% conditioning agent and 25-35% solid ammonium sulfate after metering and fully mix under stirring; 3) account for mass total ratio of 13-20% solid ammonium sulfate and After the finished product is screened, the returned material and the mixed slurry overflowed from the primary mixing tank enter the secondary mixing tank together, and are mixed evenly under the action of strong stirring; 4) The slurry continues to be strongly stirred in the third mixing tank, and the overflow comes out The slurry in the mixing tank is fully ground and finely ground by shearing emulsification, overflows into the mechanical granulator, the granulator sprays the slurry, and is air-cooled, screened, and cooled by the secondary powder flow cooler at the bottom of the tower. Spray DMPP in the coating machine to get quick-acting and long-acting fully water-soluble high-sulfur, high-ammonium nitrogen, nitrate-sulfur-based nitrogen fertilizer without caking.

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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