Method for producing silicon fertilizer through rice hulls

A technology of rice husk and silicon fertilizer, applied in the field of agricultural science, can solve problems that have not been mentioned by scholars

Active Publication Date: 2014-05-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the present invention utilizes rice husks to produce silicon fertilizer, and this technical idea has not been mentioned by scholars both at home and abroad.

Method used

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  • Method for producing silicon fertilizer through rice hulls
  • Method for producing silicon fertilizer through rice hulls
  • Method for producing silicon fertilizer through rice hulls

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A fertilizer company in Shenzhen is a large-scale joint-stock enterprise that produces compound fertilizers. Using this process to produce silicon fertilizer, the raw material compatibility (by mass percentage) used is: rice husk 55%, gypsum 27%, limestone + dolomite 14.5% (the mass ratio of limestone to dolomite is 2.5:1), Additives I and II are added in an amount of 3.5%, among which additive I is potassium feldspar + muscovite (mass ratio 1:1); additive II is mirabilite + salt (mass ratio 1:1), additives I and II The mass ratio between them is also 1:1. 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 calcination, the temperature is controlled at 1100°C, and the calcination time is 65 minutes....

Embodiment 2

[0033] A fertilizer company in Shanxi adopts this process to produce silicon fertilizer. The material compatibility (in terms of mass percentage) is: rice husk 57%, gypsum 31%, limestone + dolomite 10% (the mass ratio of limestone to dolomite is 2.3:1) , the amount of auxiliary additives I and II is 2%, of which auxiliary additive I is illite + potassium chloride (mass ratio 1:1); auxiliary additive II is table salt + sodium fluoride (mass ratio 1:1), auxiliary The mass ratio between additives I and II is 1:2. The process flow is as follows: fully mix the above mineral raw materials, and perform ball milling until the particle size is below 0.090mm; then dry the mixed material until the moisture content is less than 6%; 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 1070°C, and the calcination time is 80 minutes. The roasted pellets are cooled and crush...

Embodiment 3

[0037] A fertilizer company in Guangdong is a large private enterprise that produces soil conditioners. Using this process to produce silicon fertilizer, the production cost has dropped by nearly 54%. The raw material compatibility (in terms of mass percentage) used is: rice husk 51%, gypsum 25%, limestone + dolomite 20.5% (including limestone and dolomite) The mass ratio is 2.7:1), and the addition amount of auxiliary additives I and II is 3.5%, among which auxiliary additive I is illite + muscovite (mass ratio 1:1); auxiliary additive II is mirabilite + sodium fluoride (mass ratio 1 : 1), the mass ratio between auxiliary additives I and II is also 1:2.05. 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 4%; the dried powder is molded and processed into a particle size of about 2.2cm The pellets are put int...

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Abstract

The invention discloses a method for producing a silicon fertilizer through rice hulls. The method comprises the steps of performing full mixing and ball grinding on the rice hulls, gypsum, limestone, dolomite, an auxiliary I and an auxiliary II to obtain powder, drying and molding the powder, and roasting, cooling, smashing and packaging the product to obtain the silicon fertilizer produced from the rice hulls. The fertilizer comprises more than 65 percent of effective nutrition, more than 25 percent of effective calcium oxide, more than 22% of effective silicon dioxide, more than 5 percent of effective magnesium oxide, more than 5 percent of effective sulfur trioxide, more than 1 percent of effective potassium oxide and various medium-trace elements. The fertilizer has alkalescence (the pH is equal to 9-12). Production materials are agricultural solid waste and non-metal minerals, are readily available and have the advantage of low cost; a produced product can be used for adjusting the physical and chemical properties of acidified or salinized soil and comprehensively increasing the level of the medium-trace elements in farmlands in China and has a wide application prospect and a large market popularization value.

Description

technical field [0001] The invention relates to a production method of a novel fertilizer, which belongs to agricultural science. In particular, it relates to a method for producing silicon fertilizer by using rice husks. Background technique [0002] Rice hulls are agricultural solid wastes produced during rice processing. It has the characteristics of large output, wide source and low utilization rate. In my country's rice-producing areas, rice husks are generally discarded as waste. [0003] my country is the largest rice-growing country in the world. According to statistics from the Ministry of Agriculture, my country's rice production has reached 180.59 million tons in 2005, and rice husks usually account for 20% of rice. According to this calculation, my country's annual rice husk output is about 36 million tons, and rice husk resources are very rich. However, due to the hard surface and high silicon content of rice husk, it is not easy to be decomposed by bacter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
Inventor 石林
Owner SOUTH CHINA UNIV OF TECH
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