A special fertilizer for sea rice and its manufacturing method

A manufacturing method and technology for special fertilizers, applied in the fields of application, potash fertilizers, nitrogen fertilizers, etc., can solve problems such as increasing fertilizer production costs, achieve significant promotion and application value, increase utilization rate, and reduce ammonia volatilization loss

Active Publication Date: 2021-11-12
SHANGHAI TIANKE CHEM INSPECTION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This special fertilizer is specially added with urease inhibitor and nitrification inhibitor in order to improve the utilization rate and fertilizer efficiency of the fertilizer due to the particularity of the saline-alkali land, but it also greatly increases the production cost of the fertilizer

Method used

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  • A special fertilizer for sea rice and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of manufacture method of special fertilizer for seawater rice, the technological process of its manufacture is as follows figure 1 As shown, the granular urea with a particle size of Ф0.85~2.8mm is metered, and the water is ultra-finely sprayed on the granular urea under the action of the compressed air flow to wet the surface of the granular urea. The calcined phosphogypsum is ground to a powder passing through a 0.074mm sieve through ultra-fine grinding technology to form ultra-fine phosphogypsum powder, which is coated with granular urea wetted with water, and then sieved and dedusted. A certain amount of fertilizer-grade phosphoric acid is miscible with water, and is sprayed ultra-finely under the action of compressed air flow to wet the surface of granular urea wrapped with phosphogypsum, and then use powdered potassium chloride to carry out secondary treatment on the wet wrapped granular urea. The secondary coat is wrapped and dried. After screening and de...

Embodiment 2

[0032] A kind of manufacture method of special fertilizer for seawater rice, the technological process of its manufacture is as follows figure 1 As shown, the granular urea with a particle size of Ф1.18-3.35mm is metered, and the water is ultra-finely sprayed on the granular urea under the action of the compressed air flow to wet the surface of the granular urea. The calcined phosphogypsum is ground to a powder passing through a 0.074mm sieve through ultra-fine grinding technology to form ultra-fine phosphogypsum powder, which is coated with granular urea wetted with water, and then sieved and dedusted. A certain amount of fertilizer-grade phosphoric acid is miscible with water, and then sprayed ultra-finely under the action of compressed air flow to wet the surface of granular urea wrapped with phosphogypsum coating. The wet coated granular urea is coated with powdered potassium sulfate for a second time and dried. After screening and dedusting again, the granular fertilizer...

Embodiment 3

[0034] Using the same raw materials and preparation steps as in Example 1, the difference is:

[0035] (1) The air pressure of the compressed air used for wetting is 0.1Mpa, and the airflow velocity is 0.5m / s;

[0036] (2) The calcination temperature of phosphogypsum is 800°C, and the calcination time is 30min;

[0037] (3) The percentage concentration after fertilizer grade phosphoric acid is miscible with water is 25%;

[0038] (4) The temperature used for drying is 70° C., and the drying time is 20 minutes.

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Abstract

The invention relates to a special fertilizer for seawater rice and its manufacturing method. The special fertilizer includes core urea granules, phosphogypsum powder layer and potassium salt powder layer wrapped in turn on the outside of the urea granules. The manufacturing method includes metering, wetting, wrapping, Screening, secondary moistening, secondary packaging, metering packaging, etc. Compared with the prior art, the invention has low manufacturing cost, is especially suitable for saline-alkaline soil due to its acidic properties, and has a slow-release effect that greatly improves fertilizer efficiency utilization, and has a significant yield-increasing effect on seawater rice after application.

Description

technical field [0001] The invention relates to the technical field of fertilizer production, in particular to a special fertilizer for seawater rice and a manufacturing method thereof. Background technique [0002] Seawater rice is a visual name for salt-alkali-tolerant rice. Seawater rice does not actually grow in seawater, but is grown in coastal tidal flat areas or inland saline-alkaline areas. In recent years, through rice breeding research, seawater rice in the test area can grow normally and the average yield per mu has reached 200-300 kg / mu. It is reported that there are 950 million hectares of saline-alkali land in the world, of which 100 million hectares (1.5 billion mu) are in China, and 280 million mu can be developed and utilized. If the cultivation of seawater rice can be promoted, the increased grain production will be considerable. [0003] As we all know, food cultivation is inseparable from fertilizers, but due to the particularity of saline-alkali land, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G5/12C05G5/30C05G3/40C05G3/80
CPCC05C9/00C05G3/80C05G5/30C05D1/02C05D3/02
Inventor 商照聪章明洪陈明良张小沁
Owner SHANGHAI TIANKE CHEM INSPECTION
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