Method for producing multielement nitro-compound fertilizer

The technology of a kind of nitro compound fertilizer and its production method is applied in the production field of multi-element nitro compound fertilizer, which can solve problems such as the inability to handle raffinate acid, chemical process slag, and difficult nutrition of monoammonium phosphate, so as to achieve low cost and promote The effect of growth and development and simple process

Active Publication Date: 2014-03-05
SINOCHEM AGRI LINYI R&D CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, monoammonium phosphate devices are mostly used to process these slags. However, with the continuous reduction of high-grade phosphate rocks in my country and the continuous application of low-grade phosphate rocks, it is more difficult to produce monoammonium phosphate itself. Increasing raffinate and chemical residues

Method used

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  • Method for producing multielement nitro-compound fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 100 grams of wet process phosphoric acid concentrated sludge, 120 grams of chemical process slag, 105 grams of raffinate acid, 70 grams of potassium sulfate, and 20 grams of borax, stir evenly, add 300 grams of nitric acid (65-68%) to react for 3 minutes, and pass ammonia The neutralization reaction is carried out with gas, and the neutralization degree is adjusted to 1.15, and then dried at 100°C. A qualified product is obtained: the effective content (weight percentage) of the product is 40.47%, of which the nitrate nitrogen content is 7.07%, the ammonia nitrogen content is 13.43%, the phosphorus pentoxide content is 14.26%, and the potassium oxide content is 5.71%. It also contains 1.60% calcium oxide, 4.20% magnesium oxide, 1.06% silicon oxide, 0.75% iron oxide, and 0.34% boron.

Embodiment 2

[0029] Take 100 grams of wet-process phosphoric acid concentrated sludge, 130 grams of chemical process slag, 110 grams of raffinate acid, 80 grams of potassium sulfate, and 20 grams of borax, stir well, add 310 grams of nitric acid (65-68%) and react for 3 minutes, and pass ammonia The neutralization reaction is carried out with gas, and the neutralization degree is adjusted to 1.15, and then dried at 100°C. A qualified product is obtained: the effective content (weight percentage) of the product is 40.63%, of which the nitrate nitrogen content is 7.02%, the ammonia nitrogen content is 12.90%, the phosphorus pentoxide content is 14.43%, and the potassium oxide content is 6.28%. It also contains 1.57% calcium oxide, 4.28% magnesium oxide, 1.10% silicon oxide, 0.75% iron oxide and 0.33% boron.

Embodiment 3

[0031] Take 110 grams of wet process phosphoric acid concentrated sludge, 140 grams of chemical process slag, 120 grams of raffinate acid, 100 grams of potassium sulfate, and 30 grams of borax, stir evenly, add 350 grams of nitric acid (65-68%) and react for 3 minutes, and pass ammonia The neutralization reaction is carried out with gas, the neutralization degree is adjusted to 1.20, and then dried at 100°C. A qualified product is obtained: the effective content (weight percentage) of the product is 40.13%, of which the nitrate nitrogen content is 7.10%, the ammonia nitrogen content is 12.00%, the phosphorus pentoxide content is 14.01%, and the potassium oxide content is 7.02%. It also contains 1.53% calcium oxide, 4.14% magnesium oxide, 1.05% silicon oxide, 0.73% iron oxide, and 0.44% boron.

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Abstract

The invention discloses a method for producing multielement nitro-compound fertilizer. Wet-process phosphoric acid concentrated slag, chemical slag and extracted residual acid are mixed with potassium sulphate and microelements, nitric acid is then added for treatment, and the mixture is granulated and dried after the ammonia neutral reaction, so that the multielement nitro-compound fertilizer is produced. The multielement nitro-compound fertilizer has the characteristics of rich nutritional ingredients, easiness in absorption by plants, low cost, simplicity in technology, no generated waste and the like.

Description

Technical field [0001] The invention relates to a production method of nitro compound fertilizer, in particular to a production method of multi-element nitro compound fertilizer. Background technique [0002] With the development of agricultural production and the continuous improvement of crop yields, plants need more and more medium nutrients and trace elements. Due to the increase in the application of high-concentration elemental phosphate fertilizers and compound fertilizers, symptoms of lack of medium nutrients and trace elements have appeared in some areas and certain crops. Therefore, the application of fertilizers containing calcium, magnesium, sulfur and their trace elements is necessary to increase crop yields. [0003] However, most fertilizers containing medium and trace elements on the market are expensive, and they are mostly used for cash crops in agricultural production. The present invention is to provide a relatively economical method for producing compound fert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/00
Inventor 盛勇梅胜明周佩谭伟韦莎刘萍何倩胡满川王小平陈明凤
Owner SINOCHEM AGRI LINYI R&D CENT CO LTD
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