Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing nitrogen-phosphorus-potassium mixed fertilizer by utilizing phosphorus-potassium associated ore

A nitrogen-phosphorus-potassium compound fertilizer and phosphorus-potassium associated mineral technology can be used in applications, fertilization devices, fertilizer mixtures, etc., and can solve problems such as waste of resources and achieve the effects of improving soil, lowering reaction temperature, and realizing resource utilization.

Active Publication Date: 2015-07-01
WUHAN INSTITUTE OF TECHNOLOGY +1
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, people usually enrich phosphate ore through mature beneficiation technology and apply it in the field of phosphorus chemical industry, while the potassium resources in phosphorus and potassium associated ore are backfilled in the tunnel in the form of tailings, resulting in a huge waste of resources

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
  • Method for producing nitrogen-phosphorus-potassium mixed fertilizer by utilizing phosphorus-potassium associated ore
  • Method for producing nitrogen-phosphorus-potassium mixed fertilizer by utilizing phosphorus-potassium associated ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for producing nitrogen, phosphorus and potassium compound fertilizers by using phosphorus and potassium associated ore, the process flow is as follows figure 1 Shown, specific preparation method comprises the following steps:

[0030] 1) The phosphorus and potassium associated ore is crushed, and 100g of phosphorus and potassium associated ore (grain size-0.074mm, 89.6%; P 2 o 5 The content is 28wt%; K 2 O content is 3.9wt%), add water to moisten, add sulfuric acid solution (70wt%) 886ml and ammonium fluoride 100g, mix and place in the reaction kettle, airtightly heat to 120 ℃, under self-pressure condition constant temperature reaction 2.0h.

[0031] 2) Maintain 120°C and continue the constant temperature reaction for 0.8h under the condition of negative pressure of 0.1MPa to obtain the bottom product A, and the gas SiF obtained under negative pressure 4 Absorb with ammonia water to get (NH 4 ) 2 SiF 6 Absorbent C.

[0032] 3) Filter the bottom mixture ...

Embodiment 2

[0038] A kind of method that utilizes phosphorus and potassium associated ore to produce nitrogen, phosphorus and potassium compound fertilizer, adopts the ammonium fluoride reflux liquid that embodiment 1 obtains (NH 4 F concentration is 27.3wt%, density is 1.082g / cm 3 ) as a fluoride additive, the specific preparation method comprises the following steps:

[0039] Take by weighing 100g phosphorus and potassium associated ore (particle size-0.074mm, 92.4%; P 2 o 5 The content is 10.6wt%; K 2 O content is 11.0wt%), add 185ml ammonium fluoride reflux liquid, add sulfuric acid solution (70wt%) 445ml after mixing evenly, under self-pressure and 150 ℃ of conditions, constant temperature reaction 1.5h; Then under negative pressure is 0.1MPa and Under the condition of 150° C., the constant temperature reaction was continued for 0.8 h, and the other steps were the same as in Example 1.

[0040] After testing: the total nutrient (N+P) of the high-concentration nitrogen, phosphorus a...

Embodiment 3

[0042] A kind of method that utilizes phosphorus and potassium associated ore to produce nitrogen, phosphorus and potassium compound fertilizer, adopts the ammonium fluoride reflux liquid that embodiment 1 obtains (NH 4 F concentration is 20.4wt%, density is 1.070g / cm 3 ) as a fluoride additive, the specific preparation method comprises the following steps:

[0043] Take by weighing 100g phosphorus and potassium associated ore (particle size-0.074mm, 88.7%; P 2 o 5 The content is 22.7wt%, K 2 O content is 6wt%), add 120ml ammonium fluoride reflux liquid, add sulfuric acid solution (70wt%) 798ml after mixing evenly, under autogenous pressure and 140 ℃ of conditions, constant temperature reaction 1.5h; Under the condition of 140° C., the constant temperature reaction was continued for 1.0 h, and the other steps were the same as in Example 1.

[0044] After testing: the total nutrient (N+P) of the high-concentration nitrogen, phosphorus and potassium compound fertilizer that ...

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 method for producing a nitrogen-phosphorus-potassium mixed fertilizer by utilizing phosphorus-potassium associated ore. The method comprises the following steps: by taking the phosphorus-potassium associated ore as a raw material, mixing with sulfuric acid and fluoride aids in a reaction kettle, heating, sequentially reacting in the reactor under the reactor pressure and negative pressure conditions, filtering the kettle substrate after the reaction is ended, regulating the pH value of the obtained filtrate to be 6.5-8.0 by using ammonia water, evaporating, crystallizing, and granulating, thereby obtaining a high-concentration nitrogen-phosphorus-potassium mixed fertilizer; and regulating the pH value of the obtained filter residues to be 6.5-8.0 by using ammonia water, drying, and crushing, thereby obtaining the low-concentration nitrogen-phosphorus-potassium mixed fertilizer. According to the method disclosed by the invention, the phosphorus-potassium associated ore is applied to preparing the nitrogen-phosphorus-potassium mixed fertilizer, the phosphorus-potassium associated ore can be recycled, and the imbalance between supply and demand of the potash fertilizers in China is relieved; and moreover, the involved production process is simple, the reaction temperature is low, the conventional potash fertilizer preparation process can be fully utilized, the equipment investment is low, and the method is energy-saving and environment-friendly.

Description

technical field [0001] The invention belongs to the field of resource reuse, and in particular relates to a method for producing nitrogen, phosphorus and potassium compound fertilizers by using phosphorus and potassium associated minerals. Background technique [0002] The ratio of fertilizer nutrient elements in my country is seriously lacking in phosphorus and potassium, and there is an urgent need to vigorously develop phosphorus and potassium fertilizers. Phosphate ores in my country are mostly medium and low-grade ores and paragenetic ores. Potassium ores only exist in a few limited areas, and the reserves are limited. The development of phosphorus and potassium fertilizers is subject to various restrictions. [0003] In recent years, collophanite and potassium feldspar associated phosphorus and potassium ore have been found in Yiling area, Yichang City, Hubei Province. The main components are collophosite and potassium feldspar. In part, the phosphorus minerals are ma...

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): C05G3/00
Inventor 李亮罗惠华王存文苗华军侯慧芳张战利李宇新
Owner WUHAN INSTITUTE OF TECHNOLOGY