Artificial soil based on copper tailing modification and preparation method thereof

A technology of artificial soil and copper tailings, applied in the fields of botanical equipment and methods, planting substrates, soil conditioning materials, etc., can solve the problems of consuming natural soil resources, and achieve the effects of improving the ecological environment, reducing costs, and reducing pollution

Pending Publication Date: 2021-07-27
KUNMING PROSPECTING DESIGN INST OF CHINA NONFERROUS METALS IND
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional guest-soil method for ecological restoration consumes precious natur

Method used

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  • Artificial soil based on copper tailing modification and preparation method thereof
  • Artificial soil based on copper tailing modification and preparation method thereof
  • Artificial soil based on copper tailing modification and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0019] A kind of artificial soil preparation method and implementation steps based on copper tailings modification of the present invention are:

[0020] The first step is the preparation of raw materials. (1) Screening of copper tailings: Use the cyclone on the tailings delivery pipeline to classify the solid particles of the copper tailings slurry, and the separated fine particles will be made into particles with a particle size greater than 0.075mm, which will not exceed 50% of the total mass , and the copper ore tailing silt with plasticity index not greater than 10 is used for later use; (2) Production of microbial fertilizer: mix air-dried cow manure, sheep manure and chicken manure according to the quality of 1:1:1 and then crush them, add actinomycetes , Bacillus subtilis, nitrogen-fixing bacteria and other strains, after 10-15 days of fermentation and decomposing at 40-50°C, the organic matter content is ≥60%, the number of effective viable bacteria is ≥0.2 billion / g,...

Embodiment 1

[0025] The tailings in the Longdu tailings pond of the Dahongshan Copper Mine are taken. The main chemical composition is shown in Table 1, and the particle composition is shown in Table 2. Add the materials in the ratio shown in Table 3 to improve the physical, chemical and soil biological properties of the tailings. After mixing evenly, three kinds of artificial soils can be used for ecological restoration and greening. The test results of the physical and chemical parameters of the finished artificial soil are as follows: Table 4 shows. The artificial soil made by modifying copper tailings has the soil porosity, pH and nutrients nitrogen, phosphorus and potassium required for plant growth, and has good cohesion to prevent rain erosion and erosion.

[0026] Table 1 Main chemical composition of copper tailings before modification

[0027]

[0028]

[0029] Table 2 Particle composition table of copper tailings before modification

[0030]

[0031] Table 3 Distributi...

Embodiment 2

[0049] Take tailings from the Longdu tailings pond of Dahongshan Copper Mine, make artificial soil according to the material composition ratio in Table 3, put the prepared artificial soil into flower pots, and plant fenugreek, tall fescue, and alfalfa Three kinds of plants; for comparison, the natural soil in the green belt of an office site in Kunming was also planted with the same species of seeds. After sowing, water and maintain the plants to germinate, and observe the germination rate and growth status of the plants. The planting test results are shown in Table 5-Table 6. After one year of planting, the growth of plants on the artificial soil modified by copper tailings is stable and good, which is basically the same as that on the natural soil. related to the "copper-loving" plants.

[0050] Table 5 Emergence rate of plants on artificial soil after modification of copper tailings (Dahongshan copper mine tailings)

[0051] Numbering Herbs tall fescue Alf...

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Abstract

The invention discloses artificial soil based on copper tailing modification and a preparation method thereof. The artificial soil is prepared from the following components in parts by mass: 100 parts of copper tailings, 10 to 20 parts of bagasse fiber, 4 to 8 parts of low-alkali cement, 0.2 to 0.4 part of aggregate accelerant, 0.06 to 0.10 part of drought-resistant water-retaining agent, 0.4 to 0.8 part of acidity regulator and 5 to 10 parts of microbial fertilizer. According to the invention, the copper tailings are used as a main raw material, and other components are doped to modify the copper tailings, so that the copper tailings have physicochemical properties and nutritional components required by plant growth, the artificial soil for ecological restoration can be produced by using local materials on mines, precious natural soil resources are not consumed, the purpose of treating wastes with wastes is realized, the cost of copper mine ecological environment restoration and treatment is reduced, pollution caused by tailing stockpiling is reduced, and the ecological environment of a mining area and the surrounding of the mining area is improved.

Description

technical field [0001] The invention belongs to the field of mine ecological environment restoration and management, and in particular relates to a modified artificial soil based on copper tailings and a preparation method thereof. Background technique [0002] Tailings are wastes that are discharged after the ore is ground to select "useful components" during ore dressing, and tailings ponds are places for storing tailings waste. my country has a long history of copper mining. In addition, there are many poor ore and few rich ore resources in my country. For every ton of copper produced, 400 tons of waste rock and tailings will be produced. Up to now, my country has accumulated about 3 billion tons of copper tailings. . Among them, Jiangxi has the most copper tailings, reaching 496 million tons, accounting for about 16.5% of the national total; followed by Yunnan, with 392 million tons of copper tailings, accounting for about 13.1% of the national total; the third is Hubei,...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B18/12A01G24/10A01G24/15A01G24/20A01G24/25A01G24/42C09K17/40C09K109/00
CPCC04B28/06C04B18/12A01G24/42A01G24/25A01G24/10A01G24/20A01G24/15C09K17/40C09K2109/00C04B2111/00758C04B2201/20C04B18/248C04B24/2652C04B24/2641C04B24/126C04B22/147C04B22/0006Y02W30/91
Inventor 成词峰刘文连郑庭丁飞赵海燕孙熙宁眭素刚谭坤曾家鹏段彧凡董伟王亚磊许汉华康杰肖经光董柱速田勇槐以高杨正东槐翔英
Owner KUNMING PROSPECTING DESIGN INST OF CHINA NONFERROUS METALS IND
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