Method for preparing mineral fertilizer by using serpentine

A technology of mineral fertilizer and serpentine, which is applied in the field of agricultural science, can solve the problems of lack of various trace elements and effective supplementation of mineral nutrients, and achieve the effect of reducing energy consumption

Active Publication Date: 2014-04-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the acidic soil areas in the south, these mineral nutrients have not been effectively supplemented for a long time. In addition to the leaching of these nutrients by acidic precipitation and the absorption of crops, these mineral elements are very deficient in the soil. According to Guangdong Provincial Agricultural According to the data of the Academy of Sciences: At present, the potassium deficiency in the soil in Guangdong is more than 90%, the lack of silicon, calcium, magnesium, sulfur, etc. is maintained at around 50%, and there is a lack of various trace elements

Method used

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  • Method for preparing mineral fertilizer by using serpentine

Examples

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Effect test

Embodiment 1

[0031] A fertilizer company adopts this process to produce mineral fertilizers, which are added to nitrogen, phosphorus, and potassium ternary compound fertilizers as fillers, which can make the original nitrogen-phosphorus-potassium compound fertilizer more comprehensive and more nutritious. tends to balance. The mineral raw materials used are: 55% serpentine, 14% gypsum, 25% limestone, 12% limestone, 4% auxiliary additive I / II, and auxiliary additive I is potassium feldspar + muscovite (mass ratio 1:1); auxiliary additive II is Glauber's salt + salt (mass ratio 1:1), and the mass ratio between auxiliary additives I and II is 0.75:1. The technological process is as follows: fully mix the above mineral raw materials, and perform ball milling until the particle size is below 0.074mm; then dry the mixed material until the moisture content is less than 5%; the dried powder is formed into a particle size of about 2cm pellets, and enter the activation kiln for roasting, the temper...

Embodiment 2

[0033] A fertilizer company in Shanxi adopts this process to produce fertilizer materials: 37% serpentine, 25% gypsum, 24.5% limestone, 10% limestone, 3.5% auxiliary additive I / II, and auxiliary additive I is illite + carbonic acid Potassium (mass ratio 1:1); auxiliary additive II is salt + sodium fluoride (mass ratio 1:1), and the mass ratio between auxiliary additives I and II is 1.25:1. The process flow is as follows: fully mix the above-mentioned mineral raw materials, and perform ball milling until the particle size is below 0.074mm; then dry the mixed material until the moisture content is less than 5.2%; the dried powder is formed into a particle size of about 1.5cm The pellets are put into the activation kiln for calcination, the temperature is controlled at 950°C, and the calcination time is 1.5 hours. After activation and roasting, the pellets are cooled and pulverized, and can be made into mineral compound fertilizer. Among them, through the third-party component i...

Embodiment 3

[0035]A fertilizer company in Guangdong is a large private enterprise that produces soil conditioners. Using this process, the production cost has been reduced by nearly 51%. The mineral raw materials used are: 52% serpentine, 8% gypsum, 20% limestone, 15.5% limestone, and 4.5% auxiliary additives I / II. Additive I is illite + muscovite (mass ratio 1:1); additive II is mirabilite + sodium fluoride (mass ratio 1:1), and the mass ratio between additives I and II is 1:0.75. The process flow is as follows: fully mix the above mineral raw materials, and perform ball milling until the particle size is below 0.074mm; then dry the mixed material until the moisture content is less than 4.7%; the dried powder is molded and processed into a particle size of about 1.5cm The pellets are put into the activation kiln for calcination, the temperature is controlled at 1025°C, and the calcination time is 60 minutes. After activation and roasting, the pellets are cooled and crushed to make miner...

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Abstract

The invention discloses a method for preparing a mineral fertilizer by using serpentine. The method is mainly characterized by comprising the following steps of: mixing serpentine, plasters, white mud and limestone with additive agents I and II and the like in proportion; drying; forming; calcining; cooling; and ball-milling to prepare the mineral fertilizer by using serpentine. Available nutrients in the prepared fertilizer are not less than 65%, wherein available calcium oxide is more than 25%, available silicon dioxide is more than 20%, available magnesium oxide is more than 13%, available sulfur trioxide is more than 5%, available chlorine is more than 2%; and a plurality of trace elements are contained in the prepared fertilizer. The fertilizer is alkalescent (pH=9 to 12). Most of production raw materials are composed of natural mineral substances, thus the method has the advantages of convenience in material obtaining, low cost and the like; and the fertilizer is a natural mineral substance fertilizer which can be used for adjusting the physicochemical properties of acid soils or saline-alkali soils and comprehensively improving the trace element level in soil and has high application value and market popularization potential.

Description

technical field [0001] The invention relates to a production method of a novel fertilizer, which belongs to agricultural science. Specifically, it relates to a method for producing mineral fertilizer by using serpentine. Background technique [0002] Serpentinite is an ultrabasic rock metamorphosed by the influence of high-temperature gas to liquid. The main minerals are serpentine, fiber serpentine, etc., and the content of MgO can reach more than 40%, which has strong heat resistance. Serpentinite is mostly dark green, black green, and yellow-green, with snakeskin-like blue and green markings, and the color is gorgeous. The texture of serpentine is dense, hard and delicate, and it has the characteristics of carving, fire resistance, corrosion resistance, sound insulation and heat insulation. Massive serpentinite has a hardness of 2.5-3.5 and a density of 2.5-2.62g / cm 3 , with shell-like or jagged fractures. Serpentinite can decompose in acidic medium, releasing magnesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05D11/00
Inventor 石林
Owner SOUTH CHINA UNIV OF TECH
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