Supercharge Your Innovation With Domain-Expert AI Agents!

Preparation method of composite silicate nitrogen fertilizer

A technology of compound silicate and nitrogen fertilizer, applied in fertilization methods, urea compound fertilizer, nitrogen fertilizer and other directions, can solve the problems of poor slow-release effect of urea-formaldehyde slow-release fertilizer, high energy consumption of silicate fertilizer, and poor particle strength, etc. , to achieve the effect of disease prevention and insect prevention plants absorbing heavy metals, reducing plants absorbing heavy metals, and increasing the effective silicon content

Active Publication Date: 2022-05-27
大连环球矿产股份有限公司
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects in the above-mentioned prior art, the technical problem to be solved by the present invention is that the slow-release effect of urea-formaldehyde slow-release fertilizer is not good enough, and the particle strength is poor; and Calcination method to prepare silicate fertilizer has technical defects of high energy consumption, heavy pollution and high carbon emissions

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
  • Preparation method of composite silicate nitrogen fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of composite silicate nitrogen fertilizer, comprising the following steps: 1. taking CaSiO 3 100kg of wollastonite raw material with a mass content of 95% was ground to a wollastonite micropowder with a particle size of 5um and a length-diameter ratio of 15:1 with a jet pulverization pressure of 0.6MPa, and the wollastonite micropowder was prepared in a chemical reaction kettle A slurry with a concentration of 55% was formed, and the stirring speed was 400 rpm. 2. In the slurry of step 1, dropwise add the sulfuric acid with a concentration of 0.5 mol / kg, and the sulfuric acid dripping rate is 0.03 mol / min, so that the pH value is under the condition of 5.5, and the reaction temperature is kept at 50 ° C, and the stirring speed is kept at 400 rpm. The reaction time 8min. 3. 500kg of urea with a particle diameter of 2.5mm is added to the drum granulator for preheating with hot air, and when the temperature reaches 35 ° C, the reaction mixture obtaine...

Embodiment 2

[0031] A preparation method of composite silicate nitrogen fertilizer, comprising the following steps: 1. taking CaSiO 3 100kg of wollastonite raw material with a mass content of 90% was ground to a wollastonite micropowder with a particle size of 10um and an aspect ratio of 8:1 at a jet pulverization pressure of 0.4MPa, and the wollastonite micropowder was prepared in a chemical reaction kettle A slurry with a concentration of 45% was formed, and the stirring speed was 200 rpm. 2. In the slurry of step 1, drip the sulfuric acid with a concentration of 0.35 mol / kg, and the sulfuric acid dripping rate is 0.03 mol / min, so that the pH value is under the condition of 6.5, and the reaction temperature is kept at 45 ° C, and the stirring speed is kept at 200 rpm, and the reaction time 8min. 3. 600kg of urea with a particle diameter of 1mm is added to the drum granulator for preheating with hot air, and when the temperature reaches 30 ° C, the reaction mixture obtained in step 2. A...

Embodiment 3

[0034] A preparation method of composite silicate nitrogen fertilizer, comprising the following steps: 1. taking CaSiO 3 105kg of wollastonite raw material with a mass content of 95% was ground to a wollastonite micropowder with a particle size of 6um and an aspect ratio of 13:1 at a jet pulverization pressure of 0.5MPa, and the wollastonite micropowder was prepared in a chemical reaction kettle A slurry with a concentration of 50% was formed, and the stirring speed was 300 rpm. 2. In the slurry of step 1, drip the sulfuric acid with a concentration of 0.4 mol / kg, and the sulfuric acid dripping rate is 0.03 mol / min, so that the pH value is under the condition of 5.8, and the reaction temperature is kept at 55 ℃, and the stirring speed is kept at 300 rpm, and the reaction time for 7min. 3. 600kg of urea with a particle diameter of 2mm is added to the drum granulator for preheating with hot air, and when the temperature reaches 32 ° C, the reaction mixture obtained in step 2. i...

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

PropertyMeasurementUnit
Average compressive strengthaaaaaaaaaa
Average compressive strengthaaaaaaaaaa
Average compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a composite silicate nitrogen fertilizer, and belongs to the technical field of novel fertilizers for improving fertilizer efficiency and soil. Wollastonite is used as a raw material, and the content of citrate-soluble silicon element is increased through mechanical surface activation modification and acidification dissolution; the active silicate and urea are subjected to chemical reaction to generate a protective coating layer with stable property and biological activity, silicate can reduce urease activity so as to effectively inhibit hydrolysis of urea, improve the performance and form of nitrogen fertilizer and adjust the nutrient release rate to supply according to the fertilizer requirement rule of crops, the slow release effect is good, and the slow release effect is good. The nitrogen utilization rate is greatly improved; a silicate multi-layer coating and ammonification forming process improves the granulation working condition and the fertilizer crystallization condition, and the compressive strength of the fertilizer granules is increased; the content of effective silicon which is provided by active silicate and can be absorbed by crops is remarkably increased, soil can be improved, plant root growth can be stimulated, the yield can be increased, and the effects of preventing diseases and insects and reducing heavy metal absorption of plants are achieved.

Description

technical field [0001] The invention belongs to the technical field of novel fertilizers for improving fertilizer efficiency and soil improvement, and in particular relates to a preparation method of an environment-friendly multi-component compound silicate nitrogen fertilizer. Background technique [0002] Nitrogen is the main nutrient required for plant growth. The annual pure application amount of nitrogen fertilizer in my country is about 25 million tons, but the nitrogen utilization rate is only about 30%, while that in developed countries can reach 50-60%; It is a waste of resources, and has a negative impact on the atmosphere, soil, water and other environments, and also poses a certain threat to human health. Slow and controlled release fertilizers synchronize the release of nutrients with the nutrients required for crop growth and absorption through various mechanisms, thereby improving nitrogen utilization. The condensation of urea and aldehydes to prepare urea-form...

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): C05G3/40C05G5/12C05G5/30A01C21/00C05G3/60
CPCC05G3/40C05G5/12C05G5/30A01C21/00C05C1/00C05C3/00C05G3/60C05C9/00C05D3/00Y02P60/21
Inventor 张延大张梦显许东尧张续坤
Owner 大连环球矿产股份有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com