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Matrix coal gangue and preparation method thereof, and seedling growing matrix

A technology for raising seedling substrate and coal gangue, which is applied in the directions of planting substrate, botanical equipment and method, culture medium, etc., can solve the problems of low utilization rate of coal gangue, environment, occupation of land, etc.

Active Publication Date: 2018-08-03
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the utilization rate of coal gangue in my country is low, and the disposal methods are mostly open-air stacking, which takes up a lot of land and causes many environmental problems at the same time.

Method used

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Examples

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Effect test

preparation example Construction

[0022] The invention provides a method for preparing matrix-based coal gangue, comprising the following steps:

[0023] 1) Pulverizing the coal gangue to obtain coal gangue particles;

[0024] 2) mixing the gangue particles obtained in step 1) with water and acid to obtain a mixture of gangue particles;

[0025] 3) performing ozone aeration and ultrasonic treatment on the coal gangue particle mixture obtained in step 2) simultaneously to obtain an activated coal gangue mixture;

[0026] 4) adding alkali to the activated coal gangue mixture obtained in step 3), and separating the solid and liquid to obtain activated coal gangue;

[0027] 5) Mix the activated coal gangue obtained in the step 4) with the sodium alginate aqueous solution, and dry to obtain matrixed coal gangue.

[0028] The invention crushes the coal gangue to obtain the coal gangue particles. In the present invention, the coal gangue is preferably coal gangue whose heavy metal content is lower than the require...

Embodiment 1

[0043] Crush the coal gangue with a humic acid content of 32.5% and pass through a 20-mesh sieve to obtain 1L of coal gangue particles with a particle size of 0.5-0.8mm, add 500mL of water, and add sulfuric acid to adjust the pH value to 2 to form coal gangue The particle mixture is aerated with an ozone generator with an ozone aeration rate of 1g / h, and at the same time, an ultrasonic generator with a rated maximum power of 250W is used for ultrasonic aeration treatment at a power of 60W for 1 hour, and the treatment temperature is controlled at 45 ℃, stirring occasionally to obtain the activated coal gangue mixture; adding sodium hydroxide to the activated coal gangue mixture to adjust the pH value of the mixture to 4.5, and filtering to obtain the activated coal gangue; adopting the ammonium acetate method to measure the cation exchange capacity of the activated coal gangue; measured The cation exchange capacity of the activated coal gangue is 6.8cmol(+) / kg;

[0044] Mix 10...

Embodiment 2

[0047] Crush the coal gangue with a humic acid content of 56.5% and pass through a 20-mesh sieve to obtain 2L of coal gangue particles with a particle size of 0.6-0.8mm. Add 1000mL of water and sulfuric acid to adjust the pH value to 2 to form gangue The mixture of particles is aerated with double heads of an ozone generator with an ozone production rate of 1g / h, and treated with ultrasonic aeration for 90 minutes at a power of 150W, and the treatment temperature is controlled at 40°C, with occasional stirring, to obtain an activated coal gangue mixture; Add potassium hydroxide to the coal gangue mixture to adjust the pH value of the mixture to 6.5, filter to obtain activated coal gangue; adopt the ammonium acetate method to measure the cation exchange capacity of activated coal gangue; record the cation exchange capacity of its activated coal gangue as 7.6cmol ( +) / kg;

[0048] Mix 160mL sodium alginate aqueous solution (concentration: 1.5wt%) with activated coal gangue and d...

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Abstract

The invention provides a preparation method for matrix coal gangue and relates to a solid waste treatment process. The preparation method for the matrix coal gangue includes the following steps that coal gangue is smashed, and coal gangue particles are obtained; the coal gangue particles are mixed with water and acid, and a coal gangue particle mixture is obtained; the coal gangue particle mixtureis subjected to ozone aeration and ultrasonic treatment at the same time, and an activated coal gangue mixture is obtained; alkali is added in the activated coal gangue mixture, solid-liquid separation is performed, and activated coal gangue is obtained; and the activated coal gangue is mixed with an sodium alginate aqueous solution, and the matrix coal gangue is obtained through drying. According to the method, part of organic components, humic acid and micro elements, similar with coal, in the coal gangue are activated, the condition suitable for plant growth is formed, and the purposes ofchanging waste into wealth and achieving resource utilizing are achieved. It can be seen that from the embodiment, the coal gangue matrix is favorable for plant root growth, and avoids the top cover soil phenomenon easily happening to a turf type matrix; and the water retaining property is better than that of the turf type matrix.

Description

technical field [0001] The invention relates to the field of solid waste treatment, in particular to matrix-based coal gangue, a preparation method thereof, and a seedling-raising matrix. Background technique [0002] The composition of coal gangue is mainly oxides of silicon, aluminum, calcium, magnesium, and iron. Although the composition of these oxides in coal gangue varies greatly depending on the place of origin, its chemical composition and structure are mostly related to those of the weathering under the soil layer of the place of origin. The mineral composition of rocks is similar; coal gangue also contains some organic components similar to coal, humic acid and trace elements. [0003] Coal gangue is a rock with relatively high carbon content produced during coal mining and washing, and has become the largest industrial solid waste in my country. At present, the utilization rate of coal gangue in my country is low, and the disposal method is mostly open-air stacki...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00A01G24/17C05G1/00
CPCA01G24/17B09B3/00B09B5/00C05D9/00C05F11/00C05F11/02
Inventor 马建陈欣
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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