CN103319264B - Glass pumice capable of slowly releasing fertilizer and preparation method thereof - Google Patents

Abstract

The invention relates to glass pumice capable of slowly releasing a fertilizer. The glass pumice capable of slowly releasing fertilizer is characterized by being prepared by sintering a foamed mixture, wherein the foamed mixture comprises the following components in percentage by weight: 55-75 percent of glass powder, 1-10 percent of marble powder, 1-10 percent of quicklime and 10-40 percent of potassium phosphate powder, wherein the fineness of the glass powder is 40-100mu m; the fineness of the marble powder is 20-40mu m; the fineness of the quicklime is 20-40mu m; the fineness of the potassium phosphate powder is 20-40mu m; the glass pumice capable of slowly releasing a fertilizer comprises foamed micro-pores of which the diameter is 0.23-5 mm. The invention also relates to a preparation method of the glass pumice capable of slowly releasing a fertilizer. The glass pumice capable of slowly releasing a fertilizer has the advantage that the utilization rate of a phosphorous potassium compound fertilizer can be improved.

Description

Glass pumice of a kind of energy release controlled fertilizer and preparation method thereof

Technical field

The present invention relates to a kind of glass pumice, particularly relate to glass pumice of a kind of energy release controlled fertilizer and preparation method thereof.

Technical background

Current phosphorus potassium complex fertilizer is mainly used in farm crop, in use directly broadcast sowing in soil, time soon in phosphorus potassium complex fertilizer effective ingredient potash fertilizer will be lost before being absorbed completely by plant, and the calcium combination of phosphate fertilizer before being absorbed completely by plant easily and in soil and lose fertilizer efficiency; Cause the utilization ratio of phosphorus potassium complex fertilizer low thus.

Summary of the invention

The object of the present invention is to provide a kind of glass pumice that can improve the energy release controlled fertilizer of the utilization ratio of phosphorus potassium complex fertilizer.

Technology contents of the present invention is, a kind of glass pumice of energy release controlled fertilizer, and it is characterized in that it is obtained through sintering by foaming mixtures, foaming mixtures comprises the component of following weight percent:

Glass powder: 55 ~ 75

Marble flour: 1 ~ 10

Unslaked lime: 1 ~ 10

Potassium phosphate powder 10-40

Wherein the fineness of glass powder is 40 ~ 100 μm, and the fineness of marble flour is 20 ~ 40 μm, and the fineness of unslaked lime is 20 ~ 40 μm; Potassium phosphate powder fineness is 20 ~ 40 μm; The glass pumice of energy release controlled fertilizer contains foaming microporosity, and foaming micro-pore diameter is 0.23 ~ 5mm.

The sintering process adopted in the glass pumice of above-mentioned energy release controlled fertilizer is the sintering process preparing glass pumice, be specially: foaming mixtures is stacked in process furnace, foaming mixtures in process furnace through preheating, first time heat up heating, sintering heating, second time heat up after heating and foaming heating and obtain sintered and foamed heating thing, carry out naturally cooling to room temperature after being taken out from process furnace by sintered and foamed heating thing and to get product glass pumice.

Another object of the present invention is to the preparation method of the glass pumice that above-mentioned energy release controlled fertilizer is provided.

A preparation method for the glass pumice of energy release controlled fertilizer, its step is as follows:

(1), first the obtained foaming mixtures of component mixing of following weight percent will be comprised:

Glass powder: 55 ~ 75

Marble flour: 1 ~ 10

Unslaked lime: 1 ~ 10

Potassium phosphate powder 10-40

Wherein the fineness of glass powder is 40 ~ 100 μm, and the fineness of marble flour is 20 ~ 40 μm, and the fineness of unslaked lime is 20 ~ 40 μm; Potassium phosphate powder fineness is 20 ~ 40 μm;

(2), more above-mentioned obtained foaming mixtures is stacked in process furnace, foaming mixtures in process furnace through preheating, first time heat up heating, sintering heating, second time to heat up obtained sintered and foamed heating thing after heating and foaming heating, carry out naturally cooling to room temperature after being taken out from process furnace by sintered and foamed heating thing and to get product the glass pumice of energy release controlled fertilizer; Wherein preheating temperature is 350 ~ 450 DEG C, and warm up time is 5 ~ 20 minutes; First time intensification Heating temperature is 680 ~ 720 DEG C, and heat-up time is 10 ~ 30 minutes; Sintering Heating temperature is 730 ~ 770 DEG C, and heat-up time is 5 ~ 15 minutes; Second time intensification Heating temperature is 780 ~ 820 DEG C, and heat-up time is 10 ~ 30 minutes; Foaming Heating temperature is 950 ~ 1010 DEG C, and heat-up time is 5 ~ 10 minutes.

The glass pumice of the finished product energy release controlled fertilizer made in the preparation method of the glass pumice of above-mentioned energy release controlled fertilizer is when specifically using, the granular size of broadcasting sowing as required, by sub-sieve namely can be made into the particle that can broadcast sowing after being pulverized by the glass pumice of finished product energy release controlled fertilizer in pulverizer.

The present invention is compared with prior art advantageously: because the mixed sintering of potassium phosphate powder is in glass pumice, and this glass pumice is with foaming microporosity, in potassium phosphate powder, potash fertilizer and phosphate fertilizer are slow in Plant emission potash fertilizer and phosphate fertilizer from inside to outside by microporosity, potash fertilizer and phosphate fertilizer can be made thus fully to be absorbed by plant, after potash fertilizer and phosphate fertilizer particle all release, just surplus glass pumice is stayed in soil, glass pumice utilizes the characteristic of band microporosity to play increases soil permeability ventilation property, effectively improves soil compaction; Simultaneously because glass pumice powder is with weakly alkaline, disease and pest growing in soil can be reduced.

Specific embodiment

Example 1:

(1) to be the unslaked lime 0.5Kg of 30 μm and fineness be marble flour 0.5Kg, the fineness of 30 μm that, to be first cullet powder 6Kg, the fineness of 80 μm by fineness be that the potassium phosphate powder 3Kg of 30 μm mixes obtained foaming mixtures;

(2), be again stacked in process furnace by above-mentioned obtained sintered and foamed mixture, ulking thickness is 25cm, and process furnace is retort furnace; Foaming mixtures in process furnace through preheating, first time heat up heating, sintering heating, second time to heat up obtained sintered and foamed heating thing after heating and foaming heating, carry out naturally cooling to room temperature after being taken out from process furnace by sintered and foamed heating thing and to get product the glass pumice of energy release controlled fertilizer; Its foaming micro-pore diameter is 1.0 ~ 1.2mm; Wherein preheating temperature is 390 DEG C, and warm up time is 10 minutes; First time intensification Heating temperature is 690 DEG C, and heat-up time is 15 minutes; Sintering Heating temperature is 750 DEG C, and heat-up time is 10 minutes; Second time intensification Heating temperature is 810 DEG C, and heat-up time is 15 minutes; Foaming Heating temperature is 1000 DEG C, and heat-up time is 8 minutes.

Claims (2)

1. a glass pumice for energy release controlled fertilizer, it is characterized in that it is obtained through sintering by foaming mixtures, foaming mixtures comprises the component of following weight percent:

Glass powder: 55 ~ 75

Marble flour: 1 ~ 10

Unslaked lime: 1 ~ 10

Potassium phosphate powder 10-40

Wherein the fineness of glass powder is 40 ~ 100 μm, and the fineness of marble flour is 20 ~ 40 μm, and the fineness of unslaked lime is 20 ~ 40 μm; Potassium phosphate powder fineness is 20 ~ 40 μm; The glass pumice of energy release controlled fertilizer contains foaming microporosity, and foaming micro-pore diameter is 0.23 ~ 5mm.

2. a preparation method for the glass pumice of energy release controlled fertilizer, its step is as follows:

(1), first the obtained foaming mixtures of component mixing of following weight percent will be comprised:

Glass powder: 55 ~ 75

Marble flour: 1 ~ 10

Unslaked lime: 1 ~ 10

Potassium phosphate powder 10-40

Wherein the fineness of glass powder is 40 ~ 100 μm, and the fineness of marble flour is 20 ~ 40 μm, and the fineness of unslaked lime is 20 ~ 40 μm; Potassium phosphate powder fineness is 20 ~ 40 μm;

(2), more above-mentioned obtained foaming mixtures is stacked in process furnace, foaming mixtures in process furnace through preheating, first time heat up heating, sintering heating, second time to heat up obtained sintered and foamed heating thing after heating and foaming heating, carry out naturally cooling to room temperature after being taken out from process furnace by sintered and foamed heating thing and to get product the glass pumice of energy release controlled fertilizer; Wherein preheating temperature is 350 ~ 450 DEG C, and warm up time is 5 ~ 20 minutes; First time intensification Heating temperature is 680 ~ 720 DEG C, and heat-up time is 10 ~ 30 minutes; Sintering Heating temperature is 730 ~ 770 DEG C, and heat-up time is 5 ~ 15 minutes; Second time intensification Heating temperature is 780 ~ 820 DEG C, and heat-up time is 10 ~ 30 minutes; Foaming Heating temperature is 950 ~ 1010 DEG C, and heat-up time is 5 ~ 10 minutes.