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Slow-release glass fertilizer and preparation method thereof

A glass and slow-release technology, applied in the direction of fertilizer mixture, fertilization device, application, etc., can solve the problems of blank production and application of glass fertilizer, less glass fertilizer, etc., and achieve the effect of not easy to agglomerate, not easy to lose, and long fertilizer effect

Inactive Publication Date: 2010-10-20
郑庆云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are few studies and reports on glass fertilizers in my country, and the finalized production and application of glass fertilizers are basically blank.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. The composition of raw materials in molar percentage is:

[0040] P 2 o 5 42%, Na 2 O is 32%, K 2 O is 14%, CaO is 5%, MgO is 2%, Al 2 o 3 1%, CuO 2%, Fe 2 o 3 2%.

[0041] 2. Preparation method:

[0042] (1) take each raw material according to the weight percentage of each component;

[0043] (2) Fully mix the raw materials taken;

[0044] (3) Put the mixed mixture into a crucible, then put it into an electric furnace with a furnace temperature of 950° C., and keep it warm for 50 minutes;

[0045] (4) Pour the melted glass liquid into a tablet press and press into thin slices or pour into cold water;

[0046] (5) Put flake or granular glass together into a ball mill for ball milling;

[0047] (6) Sieve, test and pack the ball-milled glass powder.

[0048] 3. Test results:

[0049] The dissolution rate in distilled water is 14mg / cm 2 ·d(20℃, water)

Embodiment 2

[0051] 1. The composition of raw materials in molar percentage is:

[0052] P 2 o 5 48%, Na 2 O is 30%, K 2 O is 10%, CaO is 4%, MgO is 3%, Al 2 o 3 2%, CuO 2%, Fe 2 o 3 1%.

[0053] 2. Preparation method:

[0054] (1) take each raw material according to the weight percentage of each component;

[0055] (2) Fully mix the raw materials taken;

[0056] (3) Put the mixed mixture into a crucible, then put it into an electric furnace with a furnace temperature of 850° C., and keep it warm for 70 minutes;

[0057] (4) Pour the melted glass liquid into a tablet press and press into thin slices or pour into cold water;

[0058] (5) Put flake or granular glass together into a ball mill for ball milling;

[0059] (6) Sieve, test and pack the ball-milled glass powder.

[0060] 3. Test results:

[0061] The dissolution rate in distilled water is 5mg / cm 2 ·d(20℃, water)

Embodiment 3

[0063] 1. The composition of raw materials in molar percentage is:

[0064] P 2 o 5 35%, Na 2 O is 20%, K 2 O is 15%, CaO is 10%, MgO is 10%, Al 2 o 3 2%, CuO 4%, Fe 2 o 3 4%.

[0065] 2. Preparation method:

[0066] (1) take each raw material according to the weight percentage of each component;

[0067] (2) Fully mix the raw materials taken;

[0068] (3) Put the mixed mixture into a crucible, then put it into an electric furnace with a furnace temperature of 1050° C., and keep it warm for 100 minutes;

[0069] (4) Pour the melted glass liquid into a tablet press and press into thin slices or pour into cold water;

[0070] (5) Put flake or granular glass together into a ball mill for ball milling;

[0071] (6) Sieve, test and pack the ball-milled glass powder.

[0072] 3. Test results:

[0073] The dissolution rate in distilled water is 2mg / cm 2 ·d(20℃, water)

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PUM

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Abstract

The invention relates to a slow-release glass fertilizer and a preparation method thereof, wherein the slow-release glass fertilizer comprises the following raw materials in molar percentage: 30 to 50 percent of P2O5, 15 to 45 percent of Na2O, 5 to 30 percent of K2O, 1 to 20 percent of CaO, 1 to 20 percent of MgO, 1 to 10 percent of Al2O3, 1 to 10 percent of CuO and 1 to 10 percent of Fe2O3; the preparation method comprises the following steps: weighing, mixing, melting, casting, ball milling and packaging; and the invention has the advantages of less dosage, high fertilizer effect, long fertilizer effect, difficult loss, convenient fertilizer application, preservation and transportation, difficult agglomeration and difficult deterioration and can achieve the required release amount by controlling the dissolution rate and the granularity of the glass fertilizer.

Description

【Technical field】 [0001] The invention relates to the field of chemical industry, in particular to a slow-release glass fertilizer and a preparation method thereof. 【Background technique】 [0002] The most prominent feature of glass fertilizers is long-term slow-release, and the commercially available fertilizers are all quick-acting fertilizers, and their fertilizer effects are only a few months at the longest. Into groundwater, rivers and lakes, the so-called dissolution or loss occurs, which not only causes waste, but also pollutes water resources and causes eutrophication. x The production has increased the earth's greenhouse gases. Glass fertilizer is to melt nitrogen, phosphorus, potassium and trace elements required by plants into glass in an appropriate proportion. Glass can be made into powder, granular and spherical shapes, and can be made into fibrous, hollow fiber and tubular shapes to maintain moisture. After being applied to the soil, the glass fertilizer can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C03C3/17
Inventor 李胜春郑庆云刘志刚
Owner 郑庆云
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