Coal gangue and humic acid organic ecological soil and preparation method thereof

Abstract

The invention discloses coal gangue and humic acid organic ecological soil and a preparation method thereof, and belongs to the field of soil remediation, the coal gangue and humic acid organic ecological soil is prepared from the following raw materials in parts by weight: 10-30 parts of coal gangue, 30-50 parts of humic acid raw powder, 1-3 parts of a water-retaining agent and 1-3 parts of other additives, the chemical components of the coal gangue comprise 59.6087% of SiO2, 29.4408% of AL2O3, 0.2215% of CaO, 3.9259% of SO3, 0.0928% of MgO, 0.6676% of Na2O, 0.3093% of K2O and 0.051% of P2O5, and the purity of humic acid is 60-63%; according to the gangue humic acid organic ecological soil and the preparation method thereof, the farmland soil structure can be rapidly improved, the effects of soil ecological restoration and fertility improvement are gradually achieved, and the gangue humic acid organic ecological soil has good economic benefits and is suitable for application and popularization.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, and in particular to a coal gangue humic acid organic ecological soil and its preparation method. Background Technology

[0002] Coal gangue is a solid waste generated during coal mining, washing, and processing. With the large-scale exploitation and utilization of coal resources, a massive amount of coal gangue has been produced. Coal gangue contains combustible materials such as carbonaceous mudstone and pyrite. Long-term open-air storage can lead to spontaneous combustion, releasing toxic and harmful gases such as nitrogen oxides, carbon oxides, and sulfur dioxide. Harmless treatment of coal gangue is an effective way to solve these problems. Currently, the main utilization methods for coal gangue include: coal gangue power generation, coal gangue building materials, and comprehensive utilization of coal gangue. However, these methods involve large investments, high production costs, secondary pollution, and small amounts of coal gangue consumed.

[0003] Coal gangue, a by-product of coal production, is mainly composed of non-metallic minerals such as kaolinite, quartz, and mica. It contains a certain amount of organic matter and nutrients and can be used as soil for plant cultivation. Using coal gangue to produce organic ecological soil will greatly contribute to increased enterprise efficiency, improved environmental quality, and higher land resource utilization.

[0004] However, the organic matter and nutrient content in coal gangue is far from meeting the needs of plant growth. Bio-organic fertilizer contains more than 40% organic matter. Therefore, coal gangue is usually mixed with bio-organic fertilizer for maturation to increase the organic matter content and improve the physical structure of the soil matrix; while traditional organic ecological soil, while improving fertility, cannot repair or improve soil structure, resulting in unsatisfactory effects. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned problems by providing a method for improving farmland soil structure, gradually achieving soil ecological restoration and fertility enhancement, and having good coal gangue humic acid organic ecological soil and its preparation method.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a coal gangue humic acid organic ecological soil, characterized in that it comprises the following raw materials in parts by weight: 10-30 parts coal gangue, 30-50 parts humic acid powder, 1-3 parts water-retaining agent, and 1-3 parts other additives.

[0007] Preferably, the composition is 20 parts coal gangue, 40 parts humic acid powder, 2 parts water-retaining agent, and 2 parts other additives.

[0008] Preferably, the chemical composition of the coal gangue comprises 59.6087% SiO2, 29.4408% Al2O3, 0.2215% CaO, 3.9259% SO3, 0.0928% MgO, 0.6676% Na2O, 0.3093% K2O, and 0.051% P2O5.

[0009] Preferably, the purity of the humic acid is 60-63%.

[0010] Preferably, the other additives include pH adjusters and trace elements.

[0011] Preferably, the trace elements include iron ions and zinc ions.

[0012] A method for preparing coal gangue humic acid organic ecological soil includes the following steps: Step 1: Crush and process the coal gangue raw material to 60-100 mesh; Step 2: Process the humic acid raw powder to 60-100 mesh; Step 3: Mix coal gangue, humic acid powder, organic compost, water-retaining agent, and other additives. Step 4: Adjust the pH to neutral and age the product under controlled temperature to promote nutrient stability and degradation of harmful substances; Step 5: Granulation and drying; after mixing and stirring evenly, granulate the mixture to a particle diameter of 1.0-4.0 mm, and then dry it with airflow to retain its activity; Step Six: Quality Inspection and Storage. Test humic acid content, heavy metal residue, and pH value. Store in a moisture-proof package away from light. This invention discloses a coal gangue humic acid organic ecological soil and its preparation method, comprising the following raw materials in parts by weight: 10-30 parts coal gangue, 30-50 parts humic acid powder, 1-3 parts water-retaining agent, and 1-3 parts other additives. The coal gangue contains 59.6087% SiO2, 29.4408% Al2O3, 0.2215% CaO, 3.9259% SO3, 0.0928% MgO, 0.6676% Na2O, 0.3093% K2O, and 0.051% P2O5. The humic acid has a purity of 60-63%. Compared with existing technologies, this coal gangue humic acid organic ecological soil and its preparation method can improve farmland soil structure, gradually achieve soil ecological restoration and fertility enhancement, and have good economic benefits. Detailed Implementation

[0013] A coal gangue humic acid organic ecological soil comprises the following raw materials in parts by weight: 10-30 parts coal gangue, 30-50 parts humic acid powder, 1-3 parts water-retaining agent, and 1-3 parts other additives.

[0014] Coal gangue forms the basic framework and provides the minerals used in its production.

[0015] Humic acid is a highly active raw material.

[0016] Water-retaining agents prevent the soil from becoming too dry.

[0017] Example 1: A coal gangue humic acid organic ecological soil, comprising the following raw materials in parts by weight: 10 parts coal gangue, 30 parts humic acid powder, 1 part water-retaining agent, and 1 part other additives.

[0018] Example 2: A coal gangue humic acid organic ecological soil, comprising the following raw materials in parts by weight: 20 parts coal gangue, 40 parts humic acid powder, 2 parts water-retaining agent, and 2 parts other additives.

[0019] Example 3: A coal gangue humic acid organic ecological soil, comprising the following raw materials in parts by weight: 30 parts coal gangue, 50 parts humic acid powder, 3 parts water-retaining agent, and 3 parts other additives.

[0020] Based on the above embodiments, the chemical composition of the coal gangue is as follows: SiO2 accounts for 59.6087%, Al2O3 accounts for 29.4408%, CaO accounts for 0.2215%, SO3 accounts for 3.9259%, MgO accounts for 0.0928%, Na2O accounts for 0.6676%, K2O accounts for 0.3093%, and P2O5 accounts for 0.051%.

[0021] The purity of the humic acid is 60-63%, preferably 63%.

[0022] After being crushed, coal gangue is mixed with 63% high-purity humic acid to prepare a soil conditioner containing 10%–15% humus. This conditioner is particularly suitable for compacted, loess, sandy, and saline-alkali soils. It can effectively and quickly improve soil structure, creating favorable conditions for plant root growth. Long-term application can not only significantly increase the organic matter content in the soil, but also precisely regulate the soil pH by adding specialized conditioners, creating an ideal soil environment for crop growth and contributing to increased agricultural yields.

[0023] Based on the above embodiments, the other additives include pH adjusters and trace elements.

[0024] Trace elements include iron ions and zinc ions.

[0025] Of course, for saline-alkali soils, the soil alkalinity can be measured, and an appropriate amount of dilute sulfuric acid can be added. After use, the soil pH can be reduced to 6.8% or 7.0%.

[0026] Based on the above embodiments, the organic matter in the humic acid raw powder accounts for 62.50%, and the remainder is water.

[0027] This application for coal gangue humic acid organic ecological soil, through continuous application, can rapidly improve farmland soil structure and gradually achieve soil ecological restoration and fertility enhancement. This technology was independently developed by our company and has significant innovation and practicality.

[0028] A method for preparing coal gangue humic acid organic ecological soil includes the following steps: Step 1: Crush and process the coal gangue raw material to 60-100 mesh; Step 2: Process the humic acid raw powder to 60-100 mesh; Step 3: Mix coal gangue, humic acid powder, organic compost, water-retaining agent, and other additives. Step 4: Adjust the pH to neutral and age the product under controlled temperature to promote nutrient stability and degradation of harmful substances; Step 5: Granulation and drying; after mixing and stirring evenly, granulate the mixture to a particle diameter of 1.0-4.0 mm, and then dry it with airflow to retain its activity; Step Six: Quality Inspection and Storage. Test the humic acid content, heavy metal residues, and pH value. Store in a moisture-proof package away from light.

[0029] The prepared coal gangue humic acid organic ecological soil needs to be validated through application: The efficacy of the fertilizer was verified in field trials on crops such as corn and sunflower, and it was confirmed that it could improve soil activity and crop stress resistance.

[0030] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A coal gangue humic acid organic ecological soil, characterized in that, The raw materials include the following parts by weight: 10-30 parts coal gangue, 30-50 parts humic acid powder, 1-3 parts water-retaining agent, and 1-3 parts other additives.

2. The coal gangue humic acid organic ecological soil according to claim 1, characterized in that, 20 parts coal gangue, 40 parts humic acid powder, 2 parts water-retaining agent, and 2 parts other additives.

3. The coal gangue humic acid organic ecological soil according to claim 2, characterized in that, The chemical composition of the coal gangue is as follows: SiO2 accounts for 59.6087%, Al2O3 accounts for 29.4408%, CaO accounts for 0.2215%, SO3 accounts for 3.9259%, MgO accounts for 0.0928%, Na2O accounts for 0.6676%, K2O accounts for 0.3093%, and P2O5 accounts for 0.051%.

4. The coal gangue humic acid organic ecological soil according to any one of claims 1-3, characterized in that, The purity of the humic acid is 60-63%.

5. The coal gangue humic acid organic ecological soil according to claim 1, characterized in that, The other additives include pH adjusters and trace elements.

6. The coal gangue humic acid organic ecological soil according to claim 5, characterized in that, Trace elements include iron ions and zinc ions.

7. A method for preparing coal gangue humic acid organic ecological soil, characterized in that, Includes the following steps: Step 1: Crush and process the coal gangue raw material to 60-100 mesh; Step 2: Process the humic acid raw powder to 60-100 mesh; Step 3: Mix coal gangue, humic acid powder, water-retaining agent, and other additives; Step 4: Adjust the pH to neutral and age the product under controlled temperature to promote nutrient stability and degradation of harmful substances; Step 5: Granulation and drying; after mixing and stirring evenly, granulate the mixture to a particle diameter of 1.0-4.0 mm, and then dry it with airflow to retain its activity; Step Six: Quality Inspection and Storage. Test the humic acid content, heavy metal residues, and pH value. Store in a moisture-proof package away from light.