Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Acid soil conditioner and preparation method thereof

A soil conditioner and acidic soil technology, applied in soil conditioning materials, chemical instruments and methods, organic fertilizers, etc., can solve problems such as difficulty in releasing active calcium and magnesium ions, low soil activity, and affecting agronomic effects, etc., to achieve Conducive to soil improvement, increase utilization rate, meet the effect of soil improvement and plant growth

Inactive Publication Date: 2016-02-03
山西云大中天环境科技有限公司 +1
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is that the former is natural dolomite with very low solubility, and it is difficult to release active calcium and magnesium ions without calcination; while the latter, whose calcination process is suitable for the requirements of metallurgical building materials, has a high temperature and a long duration. In agriculture, it is often difficult to hydrate due to the dense structure of the material, and the activity in the soil is low, which affects the agronomic effect

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
  • Acid soil conditioner and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Raw materials: Dolomite with a purity of more than 95%, the feeding ratio is 100%; use a jaw crusher to crush the dolomite material to a particle size of 20-50mm; pass through a vertical preheater, and the preheating temperature is 260-300 degrees; The preheated material is sent to the rotary kiln for calcination, and a ball mill extrusion device is installed in the high temperature zone inside the rotary kiln and the heat preservation zone in the rear section. The calcination temperature is 910 degrees, the holding time is 30 minutes, and the loss-of-fire rate is controlled at about 38%; the material is hydrated after leaving the kiln, and the material in the stirring state is sprayed with water to make the hydration reaction of the surface oxide of the material The ratio is controlled so that it does not exceed 10% of the material after cooling; a single dolomite-type calcined product is obtained, and its active ingredients are: calculated as oxides, CaO+MgO≥40%, of wh...

Embodiment 2

[0066] Raw material 1: dolomite with a purity of more than 95%; the feeding ratio is 59%; raw material 2: calcite with a purity of more than 95% and a feeding ratio of 41%; use a jaw crusher to crush the dolomite to a particle size of 20- 50mm; through the vertical preheater, the preheating temperature is 260-300 degrees; the preheated material is sent to the rotary kiln for calcination, and a ball mill extrusion device is installed in the high temperature zone inside the rotary kiln and the rear heat preservation zone. The calcination temperature is 960 degrees, the holding time is 40 minutes, and the loss-of-fire rate is controlled at about 35%. The material is hydrated after leaving the kiln. The ratio is controlled so that it does not exceed 10% of the material after cooling; the high-calcium ratio calcined product is obtained, and its active ingredients are: calculated as oxides, CaO+MgO≥40%, of which, CaO30%, MgO10%, CaO / MgO The content ratio is 3.0; the compound ratio: ...

Embodiment 3

[0068]Raw material 1: dolomite with a purity of more than 95%; the feeding ratio is 45%; raw material 2: magnesite with a purity of more than 95%; the feeding ratio is 55%; the dolomite ore is crushed to the particle size with a jaw crusher 20-50mm; through the vertical preheater, the preheating temperature is 260-300 degrees; the preheated material is sent to the rotary kiln for calcination, and a ball mill extrusion device is installed in the high temperature zone inside the rotary kiln and the rear insulation zone . The calcination temperature is 910 degrees, the holding time is 30 minutes, and the loss-of-fire rate is controlled at about 38%. The material is hydrated after it leaves the kiln, and water is sprayed on the material in the stirring state to cause the hydration reaction of the surface oxide of the material. The ratio is controlled so that it does not exceed 10% of the material after cooling; a high-magnesium ratio calcined product is obtained, and its active in...

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 relates to an acid soil conditioner and a preparation method thereof. The preparation method comprises the following steps: taking dolomite as the main raw material, calcite or magnesite as an auxiliary material to adjust the product calcium and magnesium proportions, then mixing the main raw material and the auxiliary material at proportion, and calcining in an industrial kiln; taking the upper limit of the raw material decomposition temperature interval as the boundary of the calcining temperature, wherein the duration generally does not exceed 40 min; immediately performing material surface hydration treatment after the obtained product is discharged out of the kiln so as to obtain a porous loose compound alkali material which includes the main ingredients of calcium and magnesium oxides and hydroxides and contains a small quantity of calcium magnesium carbonate and carbon dioxide gas. The acid soil conditioner is used for improving acid soil and repairing heavy-metal-polluted soil, and can also serve as an intermediate raw material for producing a functional compound fertilizer.

Description

technical field [0001] The invention relates to the field of soil improvement, in particular to an acidic soil conditioner and a preparation method thereof. technical background [0002] There are vast acidic soils in our country, and the red soil, brick red soil, red red soil, and brown red soil in the south of the Yangtze River are all acidic soils. Due to the climatic factors of rainy and high temperature, the calcium and magnesium salt-based substances in the soil are continuously leached, and at the same time lead to the enrichment of aluminum in the soil. Due to the acceleration of my country's industrialization process, acid deposition has increased, and most of the large amount of acid gas discharged into the atmosphere forms acid rain and enters the soil. It is also due to the extensive use of acid-producing chemical fertilizers in agricultural planting, without paying attention to supplementing the soil base substances removed by crop harvesting. Therefore, the a...

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): C09K17/06
Inventor 符国栋妥国栋吴世斌伊百成
Owner 山西云大中天环境科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com