Special fertilizer for preparing granular rice from sandy raw materials and preparation method and application of special fertilizer

A special fertilizer and granulation technology, which is applied in the production of granulated rice special fertilizer from sandy raw materials and its manufacturing field. It can solve the problems of calcium magnesium phosphate fertilizer not easy to granulate, inconsistent fertilizer habits, and no granulation process introduced, so as to inhibit nitrification effect, promoting photosynthesis, reducing rice lodging and pest infestation

Inactive Publication Date: 2019-06-28
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method is nutritious, it is costly due to the excessive addition of various organic and water-insoluble raw materials, and it is difficult for the fertilizer to be effective in the short term. It is suitable as a base fertilizer, which is inconsistent with the fertilizer use habits of farmers who hope to be effective in a short time.
In addition, this method does not introduce the specific granulation process, not any powder raw material can be made into granules, calcium magnesium phosphate fertilizer is especially difficult to granulate
[0004] Chinese patent CN102557802B discloses a special fertilizer for rice and its preparation method. The special fertilizer is a packaged compound fertilizer with urea as the core and a mixture of thermal phosphate fertilizer, potassium fertilizer and ammonium phosphate as the coating layer. The fertilizer has high inorganic nutrients. , the total nutrient can reach 30%, which is a good fertilizer, but because the soluble fertilizer urea is wrapped, the coating formed by the reaction of thermal phosphate fertilizer and ammonium phosphate is insoluble in water, this kind of fertilizer is not easy to disperse in the soil, thus Not easily absorbed by crops

Method used

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  • Special fertilizer for preparing granular rice from sandy raw materials and preparation method and application of special fertilizer

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The specific process flow chart is as figure 1 As shown, take 55 parts of powdered calcium magnesium phosphate fertilizer, add 40 parts of powdered ammonium chloride, add 5 parts of bentonite, mix and add to the disc granulator together. After 10 minutes of granulation, transfer to a tumble dryer with a drying temperature of 160° C. and a drying time of 35 minutes. Then transfer to the cooling and screening machine, the cooling and screening time is 10 minutes, the finished product rate is about 80%, which is much higher than 60% of other processes, and the special fertilizer product for granular rice is obtained after packaging. 0. After applying the soil, the yield of rice increased by 18% per mu.

Embodiment 2

[0029] Take 66 parts of powdered calcium magnesium phosphate fertilizer, add 32 parts of powdered ammonium chloride, add 2 parts of kaolin, mix them and add them to a biaxial granulator. After 3 minutes of granulation, transfer to a belt dryer with a drying temperature of 200°C and a drying time of 25 minutes. Go to the cooling and screening machine again, cooling and screening time is 25 minutes, fine powder returns, the finished product yield is about 85%, higher than 60% of other processes, promptly get the granular rice special fertilizer product after packaging, the specification of this compound fertilizer N-P-K= 8-12-0. After applying the soil, the yield of rice increased by 22% per mu.

Embodiment 3

[0031] Take 30 parts of powdered calcium magnesium phosphate fertilizer, add 60 parts of powdered ammonium chloride, add 10 parts of attapulgite, mix them and add them to the drum granulator. After 5 minutes of granulation, transfer to a tumble dryer with a drying temperature of 300°C and a drying time of 20 minutes. Then transfer to the cooling and screening machine, cooling and screening time is 30 minutes, fine powder returns, the yield of finished product is about 75%, higher than 60% of other processes, and the special fertilizer product for granular rice is obtained after packaging, and the specification of this compound fertilizer is N-P-K= 15-5-0. After applying the soil, the yield of rice increased by 20% per mu.

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Abstract

The invention relates to a special fertilizer for preparing granular rice from sandy raw materials and a preparation method and application of the special fertilizer. A calcium-magnesium-phosphate fertilizer, ammonium chloride and a granulating agent are mixed in the weight ratio of (30-70):(30-70):(1-10); the mixture is added into a granulator for granulation, then the granulated particle material is transferred into a drying machine for drying, the dried particle material is transferred into a cooling screening machine for cooling and screening, and the special fertilizer is obtained. Compared with the prior art, the calcium-magnesium-phosphate fertilizer and the ammonium chloride are put together, and a small quantity of granulating agent is added, so that granulation is easy, nutritional requirements of paddy rice are met, and the use quantity of other chemical fertilizers can be replaced and reduced.

Description

technical field [0001] The invention relates to the technical field of fertilizer production, in particular to a special granular rice fertilizer made from sandy raw materials, a manufacturing method and application thereof. Background technique [0002] Rice is the largest food crop in China, its sown area accounts for about 27% of the total area of ​​food crops, and rice production accounts for more than 40% of China's total grain production. Due to the excessive or unreasonable application of chemical fertilizers and trace elements, the nutrient ratio in the soil is out of balance, which cannot fully meet the nutrients needed for rice growth. [0003] Chinese patent CN103011986A discloses a production method of compound calcium magnesium phosphate fertilizer, which is to add porphyritic monzonite or medical stone, sodium humate or humic acid, urea, sodium polyacrylate, poly Made of aspartic acid, rare earth nitrate, etc. Although this method is nutritious, it is costly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00A01G22/22C05G3/08C05G3/90
Inventor 杨焕银何耀陈明良李接励袁宸葛建国廖红蕖梁济
Owner SHANGHAI RES INST OF CHEM IND
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