High tower-granulated sustained-release long-acting sulfur-based nitrogen-phosphor-potassium compound fertilizer and preparation method thereof

Abstract

The invention discloses a high tower-granulated sustained-release long-acting sulfur-based nitrogen-phosphor-potassium compound fertilizer and a preparation method thereof, and belongs to the field of compound fertilizers. The preparation method comprises the following steps of preparing urea compound fertilizer particles through a high tower granulation device, carrying out first coating of the urea compound fertilizer particles with paraffin, and then carrying out second surface coating with modified zeolite powder to obtain the high tower-granulated sustained-release long-acting sulfur-based nitrogen-phosphor-potassium compound fertilizer. The urea compound fertilizer particles obtained by high tower granulation comprises: by weight, 35 to 50 parts of urea, 20 to 25 parts of monoammonium phosphate, and 30 to 40 parts of potassium sulfate. A use amount of the paraffin is 0.5 to 1.0% of the weight of urea compound fertilizer particles obtained by high tower granulation. The modified zeolite powder comprises: by weight, 1 to 5% of zine stearate and 95 to 99% of zeolite powder. The high tower-granulated sustained-release long-acting sulfur-based nitrogen-phosphor-potassium compound fertilizer can be utilized in conjunction with a high tower granulation device, has good sustained-release effects, a high fertilizer utilization rate and high potassium sulfate content, and is be beneficial for protection of soil, air and water environments. The preparation method has simple processes and low costs.

Description

technical field [0001] The invention relates to a high-tower granulated slow-release long-acting sulfur-based nitrogen, phosphorus and potassium compound fertilizer and a preparation method thereof, belonging to mixed fertilizers. Background technique [0002] The sulfur element in the sulfur-based compound fertilizer is the fourth nutrient element necessary for crop growth after nitrogen, phosphorus, and potassium. The content of chloride ions is less than 3%, which can effectively improve the soil sulfur deficiency and directly provide sulfur nutrients for crops. Sulfur-based compound fertilizer has strong adaptability to crops and soil, and has a wide range of applications. It is suitable for various food crops and economic crops, as well as chlorine-resistant crops such as tobacco, sugarcane, potato, and tea. It can be used as base fertilizer, topdressing fertilizer, seed fertilizer and root fertilizer. Top dressing outside. It plays an extremely important role in incre...

AI Technical Summary

Problems solved by technology

[0003] However, the nutrient utilization rate of sulfur-based compound fertilizers in the prior art is only 25%-35%, and the utilization rate of nitrogen fertilizer is less than 30%, the loss is particularly serious, and it causes soil pollution and pollution of the atmospheric environment.

[0004] The production process of sulfur-based compound fertilizer is complicated, the production energy consumption is high, the equipment is corroded, and resources are wasted, which leads to high production cost and pollutes the environment

[0005] Chinese patent CN 200510102650.8 discloses a melt slurry tower granulation compound fertilizer and its manufacturing method. One of the technical problems to be solved is that the structure of the compound fertilizer produced by the traditional granulation method is relatively loose, the fertilizer dissolves and releases quickly, and the fertilizer efficiency is high. Break down lost blocks, problems with low fertilizer use efficiency

Resin coatings are expensive and do not degrade easily in soil

[0007] There is no literature report on the high tower granulation slow-release long-acting sulfur-based nitrogen, phosphorus and potassium compound fertilizer in the prior art

Images