Method for converting copper tailings into soil by utilizing waste mushroom sticks

A technology of copper tailings and soil, applied in the direction of botany equipment and methods, fertilizers made of biological waste, application, etc., can solve the problems of plant poisoning, achieve the effect of scientific method, high fertility, and increase fertility

Pending Publication Date: 2021-12-31
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method achieves resource utilization of waste, it uses sludge ash fired from municipal sludge, which indirectly introduces other heavy metals into the tailings, which may cause poisonous effects on plants after planting.

Method used

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  • Method for converting copper tailings into soil by utilizing waste mushroom sticks
  • Method for converting copper tailings into soil by utilizing waste mushroom sticks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method of using waste bacteria sticks to soil copper tailings, specifically comprising the following steps:

[0038] (1) Preparation of improved materials: remove the bagged waste tea tree mushroom sticks and waste white fungus sticks and crush them to 1~2cm, and crush the yak manure to 1~3cm and then decompose.

[0039] (2) Put copper tailings with a moisture content of 10% and waste tea tree mushroom sticks into a co-pyrolysis device for pyrolysis, the added mass of waste tea tree mushroom is 1% of the mass of copper tailings, and the pyrolysis temperature is 500°C , the pyrolysis time is 20min.

[0040](3) After the co-pyrolysis is completed, add 1% waste tremella fungus sticks and 1% decomposed yak manure with a mass ratio of pyrolysis tailings, and add 0.075% of collected wood vinegar, The physical and chemical indicators of the improved tailings were measured after 60 days of cultivation. The porosity of the tailings after soilization increases, the color beco...

Embodiment 2

[0042] A method of using waste bacteria sticks to soil copper tailings, specifically comprising the following steps:

[0043] (1) Preparation of improved materials: remove the bagged waste tea tree mushroom sticks and waste white fungus sticks and crush them to 1~2cm, and crush the yak manure to 1~3cm and then decompose.

[0044] (2) Put the copper tailings with a moisture content of 20% and the waste tea tree mushroom sticks into a co-pyrolysis device for pyrolysis, the added mass of waste tea tree mushroom is 10% of the copper tailings mass, and the pyrolysis temperature is 700 ℃, the pyrolysis time is 30min.

[0045] (3) After the co-pyrolysis is completed, then add waste Tremella fungus sticks with a mass ratio of 3% to the pyrolysis tailings and decomposed yak manure with a mass ratio of 5% to the pyrolysis tailings, and measure the improved tailings after 60 days of incubation physical and chemical indicators. The porosity of the tailings after soilization increases, t...

Embodiment 3

[0047] A method of using waste bacteria sticks to soil copper tailings, specifically comprising the following steps:

[0048] (1) Preparation of improved materials: remove the bagged waste tea tree mushroom sticks and waste white fungus sticks and crush them to 1~2cm, and crush the yak manure to 1~3cm and then decompose.

[0049] (2) Put copper tailings with a moisture content of 30% and waste tea tree mushroom sticks into the co-pyrolysis device, the added mass of waste tea tree mushroom is 20% of the mass of copper tailings, and the pyrolysis temperature is 1000°C. The time is 60min,

[0050] (3) After the co-pyrolysis is completed, add 5% waste tremella fungus sticks with a mass ratio of pyrolysis tailings and 10% decomposed yak manure with a mass ratio of pyrolysis tailings, add 0.05% of collected wood vinegar, The physical and chemical indicators of the improved tailings were measured after 60 days of cultivation. The porosity of the tailings after soilization increases...

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Abstract

The invention discloses a method for converting copper tailings into soil by utilizing waste mushroom sticks. The tailings are located in high-cold and high-altitude areas, and used improvement materials are waste mushroom sticks (agrocybe cylindracea mushroom sticks and tremella mushroom sticks) and decomposed yak manure. The specific process of converting the copper tailings into soil comprises the steps that co-pyrolysis is conducted on waste agrocybe cylindracea mushroom sticks and the copper tailings in a pyrolysis device, a biochar modifier is generated, and substances, such as sulfur-containing compounds, residual flotation reagents and heavy metal, harmful to the environment and plants in the copper tailings are removed; the pyrolyzed tailings are mixed with waste tremella fuciformis sticks and composted yak manure according to a certain proportion, the agglomeration and matrix fertility of the tailings are further improved, the water retention and soil moisture conservation performance of the tailings is improved, and soil conversion of the copper tailings is achieved after maintenance for a period of time. The used improved materials are economical and effective, resource utilization of the tailings, the waste mushroom sticks and the yak manure can be achieved at the same time, and the surrounding environment of the tailings is practically improved.

Description

technical field [0001] The invention belongs to the technical field of tailings ecological restoration, and in particular relates to a method for using waste fungus sticks and yak dung to soil copper tailings. Background technique [0002] In the process of promoting my country's economic development, it is accompanied by the development of a large number of mineral resources. However, my country's mineral resources are rich and widely distributed, and copper ore resources also occupy a certain proportion. The average grade of copper in copper ore is 0.077%, which is a low-grade ore, so a large amount of tailings will be generated after mining. Tailings contain a variety of available components, and its resource utilization has become an important way to reduce it. Common resource utilization methods include: production of building materials, recovery of valuable metals, backfilling of tailings, and land reclamation. At present, the existing technology is difficult to uti...

Claims

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Application Information

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IPC IPC(8): A01G24/20A01G24/10C05G3/80
CPCA01G24/20A01G24/10C05D9/00C05G3/80C05F3/00C05F5/00C05F11/00
Inventor 黄建洪吴佩雨郎丽君张庭婷郑前兴田森林赵群
Owner KUNMING UNIV OF SCI & TECH
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