Production method for high-concentration defluorinate nitronitrogen phosphorus and potassium compound fertilizer

A nitro-nitrogen, phosphorus, and potassium production method technology, which is applied in the production field of defluorinated high-concentration nitro, phosphorus, and potassium compound fertilizers, to achieve the effects of not being easy to agglomerate, reducing pollution, and having good physical and chemical properties

Active Publication Date: 2013-05-01
TIANJI COAL CHEM IND GROUP +1
View PDF10 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is of strategic significance to develop and utilize medium and low-grade phosphate rock to produce high-concentration d

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Production method for high-concentration defluorinate nitronitrogen phosphorus and potassium compound fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The quality indicator of the phosphate rock 1 of the present embodiment: P 2 o 5 27%, CaO 42%, AI 18%, F 2.9%, MgO 2%, Fe 2 (Al 2 O) 3 A total of 3%, other impurities; the concentration of nitric acid 2 is 58%.

[0041] Nitric acid 2 and phosphate rock 1 are added to the acidolysis tank according to the stoichiometric ratio of 1.2:1 for acidolysis reaction 3, the acid insoluble matter 5 in the acidolysis solution is preliminarily separated by precipitation and separation 4, and the separated acidolysis solution enters the acid insoluble In the deep removal process 6, the acid insoluble matter is removed 6 by adding flocculant 7, and after 0.5-1 hour of flocculation and precipitation, the acid insoluble matter 9 is deeply removed by solid-liquid filtration separation 8, and the acid insoluble matter is completely separated The acid solution solution is sent into frozen crystallization 10, and calcium nitrate 12 is separated out from acid solution solution through fr...

Embodiment 2

[0045] The quality index of the phosphate rock 1 of the present embodiment is different from that of embodiment one, and the quality index is: P 2 o 5 22%, CaO 45%, AI 18.7%, F 2.5%, MgO 2.0%, Fe 2 (Al 2 O) 3 A total of 3.2%, other impurities; the concentration of nitric acid 2 was 58%.

[0046] Other processes are the same as the production process of the defluorinated high-concentration nitro-nitrogen, phosphorus, and potassium compound fertilizer in Example 1.

[0047] The total nutrient concentration of the NPK compound fertilizer 26 product obtained in the present embodiment is more than or equal to 40%, which contains P 2 o 5 11%, N 20%, K 2 O 7%, other nutrients 2.0%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a production method for high-concentration defluorinate nitro nitrogen phosphorus and potassium compound fertilizer, which is based on the conventional process route of nitric acid phosphatic manure production, an acid-insoluble substance deep desorbing procedure is added in an acid-insoluble substance precipitation separation procedure so as to radically separate the acid-insoluble substance; a mother liquor defluorinating procedure is added between calcium nitrate filtration and mother liquor neutralization, by adding potassium nitrate into mother liquor, fluosilicic acid ions in mother liquor is reacted with potassium ion to generate potassium fluorosilicate product, after defluorinating reaction, potassium fluorosilicate is separated from slurry through filtering and separating, and ammonia neutralization, evaporation, pelletization, drying and cooling treatment are performed on defluorinated mother liquor by adding potassium nitrate and ammonium nitrate, namely, high-concentration nitro nitrogen phosphorus and potassium compound fertilizer is obtained. In the invention, mid low grade phosphate rock is used for preparing compound fertilizer, namely fluorine resource is recycled, and by-product potassium fluorosilicate is obtained, pollutions to the environment are reduced, the obtained product has an excellent performance, chlorine is not contained, the application range is broad, the probability of caking is low, and the market competitiveness is strong.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a production method of defluorinated high-concentration nitro-nitrogen, phosphorus and potassium compound fertilizer. Background technique [0002] At present, the nitro compound fertilizers on the market generally use ammonium nitrate as the nitrogen source, and the compound fertilizers with high concentrations of N, P, and K are produced by adding compound fertilizer materials such as phosphorus and potassium. Nitrogen and phosphorus compound fertilizers are produced by decomposing phosphate rock with nitric acid and removing calcium by freezing. The process route is advanced, the fertilizer variety is good, and the agricultural effect is obvious. It plays an important role in the national economy. [0003] Judging from the current sales price of chemical fertilizers, the unit nutrient price of nitrophosphate fertilizer is the lowest among all kinds of c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C05G1/00
Inventor 荆宏健樊彩梅冯军强畅学华王志华魏安根刘金亮李瑞高海生李双志
Owner TIANJI COAL CHEM IND GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap