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A kind of phosphogypsum ceramsite for soilless cultivation and preparation method thereof

A soilless culture, phosphogypsum technology, applied in the directions of botanical equipment and methods, ceramic products, clay products, etc., to achieve the effects of good air permeability, excellent cylinder compressive strength, and excellent water retention performance

Inactive Publication Date: 2019-12-31
GUIZHOU KAILIN PHOSPHOGYPSUM INTEGRATION UTILIZATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art, there are relatively few studies on using phosphogypsum as the main raw material to prepare ceramsite, and using the ceramsite for the preparation of soilless culture substrates.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of phosphogypsum ceramsite for soilless cultivation comprises the following steps:

[0027] (1) Drying the phosphogypsum to constant weight, pulverizing, and passing through an 80-mesh sieve to obtain phosphogypsum powder;

[0028] (2) mixing clay, bauxite and shale according to the mass ratio of 1:1:3, grinding, and passing through an 80-mesh sieve to obtain additive powder;

[0029] (3) Mix the additive powder with urea phosphate, the mixing mass ratio is 1:0.01, water it so that the humidity is 40%, place it at 60°C for 20 minutes, stack it for 1 hour, grind it, and pass it through a 80-mesh sieve to obtain the modified product additive powder;

[0030] (4) The phosphogypsum powder and the modified additive powder are mixed according to a mass ratio of 13:3, stirred evenly, added water, and sent to a granulator for granulation and molding to obtain granules with a particle size of 5 mm;

[0031] (5) Place the granules in a steam environment a...

Embodiment 2

[0033] The preparation method of phosphogypsum ceramsite for soilless cultivation comprises the following steps:

[0034] (1) Drying the phosphogypsum to constant weight, pulverizing, and passing through an 80-mesh sieve to obtain phosphogypsum powder;

[0035] (2) mixing clay, bauxite and shale according to the mass ratio of 1:1:3, grinding, and passing through an 80-mesh sieve to obtain additive powder;

[0036] (3) Mix the additive powder with urea phosphate, the mixing mass ratio is 1:0.06, water it so that the humidity is 60%, place it at 80°C for 40 minutes, stack it for 1 hour, grind it, and pass it through a 80-mesh sieve to obtain the modified product additive powder;

[0037] (4) The phosphogypsum powder and the modified additive powder are mixed according to a mass ratio of 20:3, stirred evenly, added water, and sent to a granulator for granulation and molding to obtain particles with a particle size of 20 mm;

[0038] (5) The granules are placed in a steam enviro...

Embodiment 3

[0040] The preparation method of phosphogypsum ceramsite for soilless cultivation comprises the following steps:

[0041] (1) Drying the phosphogypsum to constant weight, pulverizing, and passing through an 80-mesh sieve to obtain phosphogypsum powder;

[0042] (2) mixing clay, bauxite and shale according to the mass ratio of 1:1:3, grinding, and passing through an 80-mesh sieve to obtain additive powder;

[0043] (3) Mix the additive powder with urea phosphate, the mixing mass ratio is 1:0.05, water it so that the humidity is 50%, put it at a temperature of 70°C for 30 minutes, stack it for 1 hour, grind it, and pass it through a 80-mesh sieve to obtain the modified product additive powder;

[0044] (4) The phosphogypsum powder and the modified additive powder are mixed according to a mass ratio of 18:3, stirred evenly, added water, and sent to a granulator for granulation and molding to obtain granules with a particle size of 15 mm;

[0045] (5) The granules are placed in ...

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Abstract

The invention relates to the technical field of ceramsite for soilless culture, in particular to ardealite ceramsite for soilless culture and a preparation method of the ardealite ceramsite. Ardealite is dried, additive powder is prepared from clay, shale and bauxite and modified with urea phosphate, ardealite and the modified additive powder are mixed and granulated to form granules, the granules are subjected to steam curing or drying treatment, so that the prepared ceramsite has better bulk density, higher cylinder compressive strength, better breathability and better water retention performance and can improve the crop growth quality after being used for preparation of a soiless culture substrate for cultured crops.

Description

technical field [0001] The invention relates to the technical field of ceramsite for soilless cultivation, in particular to phosphogypsum ceramsite for soilless cultivation and a preparation method thereof. Background technique [0002] Phosphogypsum is a solid waste produced by the phosphorus chemical industry. According to relevant statistical data, the current total stockpiling of phosphogypsum in my country has reached more than 250 million tons, and the annual new discharge exceeds 50 million tons; a large amount of phosphogypsum Stacking not only occupies land resources, brings serious economic burden to phosphorus chemical enterprises, but also causes environmental pollution. Therefore, the comprehensive utilization of phosphogypsum and the realization of turning waste into treasure has become one of the important tasks in the development and construction of the current circular economy. [0003] In the prior art, there are many comprehensive utilization methods for p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B33/13C04B33/132A01G24/42A01G24/15
CPCA01G24/00C04B33/1305C04B33/132C04B38/009C04B2235/3217C04B2235/77C04B2235/96Y02P40/60Y02P60/21
Inventor 杨永彬李泽钢向前勇杨步雷
Owner GUIZHOU KAILIN PHOSPHOGYPSUM INTEGRATION UTILIZATION
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