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Soil conditioner prepared from solid waste as well as preparation method and application of soil conditioner

A soil conditioner and solid waste technology, applied in the field of soil conditioner and its preparation, can solve the problems of inapplicability, achieve the effects of reducing the content of heavy metals, increasing soil fertility, and improving availability

Active Publication Date: 2020-08-21
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Conventional soil heavy metal treatment methods have certain limitations, and are often not suitable for large-scale soil heavy metal pollution

Method used

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  • Soil conditioner prepared from solid waste as well as preparation method and application of soil conditioner
  • Soil conditioner prepared from solid waste as well as preparation method and application of soil conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A soil conditioner prepared from solid waste:

[0037]1) Mixing of raw materials: Use an electromagnetic pulverizer to grind the raw materials of granite, marble and sludge into fine powders of 100-200 mesh, and mix the obtained granite stone powder, marble stone powder, sludge powder and additives in the ratio of 10:5:5:1 Mix in the same ratio, add water and stir evenly, and then dry at 80°C to obtain a mixture;

[0038] 2) High-temperature thermal activation: Put the mixture into a muffle furnace preheated to 500°C and roast for 0.5h, the heating rate is 10°C / min, and heat to activate it at high temperature;

[0039] 3) Water quenching: the activated mixture is removed, and supercooled water is used for rapid cooling;

[0040] 4) Drying: drying the rapidly cooled mixture, pulverizing and grinding the sample to 60-100 meshes to obtain the soil conditioner product, the tested effective silicon content is 20.92%.

Embodiment 2

[0042] A soil conditioner prepared from solid waste:

[0043] 1) Mixing of raw materials: Use an electromagnetic pulverizer to grind the raw materials of granite, marble and sludge into fine powders of 100-200 mesh, and mix the obtained granite stone powder, marble stone powder, sludge powder and additives according to the ratio of 10:10:10:3 Mix in the same ratio, add water and stir evenly, and then dry at 90°C to obtain the mixture;

[0044] 2) High-temperature thermal activation: put the mixture into a muffle furnace preheated to 800°C and roast for 2 hours, the heating rate is 25°C / min, and heat to activate it at high temperature;

[0045] 3) Water quenching: the activated mixture is removed, and supercooled water is used for rapid cooling;

[0046] 4) Drying: dry the rapidly cooled mixture, crush and grind the sample to 60-100 meshes, and obtain the soil conditioner product. The tested effective silicon content is 20.21%.

Embodiment 3

[0048] A soil conditioner prepared from solid waste:

[0049] 1) Mixing of raw materials: Use an electromagnetic pulverizer to crush the raw materials of granite, marble and sludge into fine powders of 100-200 mesh, and mix the obtained granite stone powder, marble stone powder, sludge powder and additives according to the ratio of 10:15:15:5 Mix in the same ratio, add water and stir evenly, and then dry at 100°C to obtain a mixture;

[0050] 2) High-temperature thermal activation: Put the mixture into a muffle furnace preheated to 1000°C and roast for 3 hours, the heating rate is 40°C / min, and heat to activate it at high temperature;

[0051] 3) Water quenching: the activated mixture is removed, and supercooled water is used for rapid cooling;

[0052] 4) Drying: drying the rapidly cooled mixture, crushing and grinding the sample to 60-100 meshes to obtain the soil conditioner product, the tested effective silicon content is 21.68%.

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Abstract

The invention belongs to the technical field of soil conditioners, and particularly relates to a soil conditioner prepared from solid waste as well as a preparation method and application of the soilconditioner. The soil conditioner is prepared from granite stone powder, marble stone powder, sludge and auxiliaries. The preparation method comprises the following steps: crushing raw materials of granite, marble and sludge into fine powder, mixing granite stone powder, marble stone powder, sludge powder and auxiliaries, adding water, uniformly stirring, drying slurry after the slurry is formed,and carrying out high-temperature thermal activation, cooling and drying on the obtained mixture to obtain the soil conditioner product. The waste stone material contains silicon oxide, aluminum oxide, iron oxide, calcium oxide and other components, the sludge is rich in P2O5, potassium oxide, magnesium oxide and other components, aluminosilicate and other crystals containing few lattice defects are obtained through heat treatment of the components, the specific surface area of the material is increased, a microporous structure is formed on the surface, and therefore the effect of conditioningheavy metal contaminated soil is achieved.

Description

technical field [0001] The invention belongs to the technical field of soil conditioners, and in particular relates to a soil conditioner prepared from solid waste, a preparation method and application thereof. Background technique [0002] With the development of the economy, natural stone products are becoming more and more popular, and in the process of rapid development of this industry, the problem of waste pollution generated in the process of stone processing, grinding and polishing has become more and more serious. It is reported that every 30m produced 2 The board can produce about 1 ton of stone powder and corner waste, and my country alone can produce more than 9 million tons of stone powder waste every year. The particle size of stone powder is relatively small, and it is easily affected by wind and rain, thereby causing secondary pollution to the environment. Therefore, it is urgent to develop new methods to realize resource recovery and utilization of waste st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/06C09K17/02C09K17/08B09C1/08C09K101/00
CPCC09K17/06C09K17/02C09K17/08B09C1/08C09K2101/00B09B3/40B09C1/00
Inventor 晏波段连鑫陈涛蒋少军黄剑程胜
Owner SOUTH CHINA NORMAL UNIVERSITY
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