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A kind of artificial soil matrix and its preparation method and application

A technology of artificial soil and preparation method, applied in the direction of planting substrate, application, botanical equipment and methods, etc., can solve the problems of occupying large land and polluting the environment, reduce reconstruction costs, solve environmental pollution problems, and improve the ecological environment of mines The effect of conditional demand

Active Publication Date: 2017-06-27
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the status quo of land destruction in mining areas in the prior art, and in order to solve the problem that iron tailings stockpile takes up a large amount of land and pollutes the environment. Binder, mixed with straw, mushroom slag and water-retaining agent, etc., to obtain a low-cost artificial soil matrix suitable for ecological reconstruction of mining areas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Artificial soil matrix

[0030] The artificial soil matrix in this embodiment is based on iron tailings, and its raw materials are composed of iron tailings, cement, straw, mushroom slag, furfural slag, adhesive, organic fertilizer, water retaining agent and water.

[0031] Iron tailings are a mixture of magnetic separation iron tailings and flotation iron tailings that are dried separately and mixed according to the dry weight mass ratio of 1:1. Among them, flotation iron tailings are solid wastes discharged after iron ore beneficiation by flotation method; magnetic separation iron tailings are solid wastes discharged from magnetite after magnetic separation.

[0032] The particle composition of magnetic separation iron tailings and flotation iron tailings is shown in Table 1.

[0033] Table 1 Size classification of iron tailings

[0034] Greater than 0.15mm 0.074-0.149 mm Less than 0.074mm Flotation iron tailings 15.60% 26.58% 57.82%...

Embodiment 2

[0045] Embodiment 2 Configuration method of artificial soil matrix

[0046] According to the material composition of artificial soil matrix: 1 part of iron tailings, based on iron tailings, 1 part of iron tailings is calculated according to the weight of 100 kg, and added according to weight percentage: cement 7.0%, straw 2.0%, mushroom slag 2.0% , furfural slag 7.0%, binder 0.6%, organic fertilizer 2.0%, water retaining agent 0.1%, water 35.0%. Prepare the artificial soil matrix, the method steps are as follows:

[0047] a. First prepare iron tailings: mix the preferred magnetic separation iron tailings and flotation iron tailings evenly with a mass ratio of 1:1, and the obtained mixture is used as iron tailings for subsequent use;

[0048] b. Mix 7.0% cement and iron tailings evenly to obtain a mixture of cement and iron tailings for subsequent use;

[0049] c. Mix 2.0% straw, sieved 2.0% mushroom dregs, and 7.0% furfural dregs evenly to obtain a mixture of straw, mushroom...

Embodiment 3

[0055] Example 3 Determination of physical properties of artificial soil matrix and growth status of plants.

[0056] In this example, in-depth research was carried out on the matrix of the present invention, and the physical properties of the matrix and the growth status of the plants were studied respectively.

[0057] 1. Research on physical and mechanical properties: measure the bulk density of the matrix, the water absorption rate and water evaporation rate of the matrix, the water stability of the matrix, the unconfined compressive strength and shear strength of the matrix, etc. Since there is no uniform standard for the test of the properties of the ecological matrix, this experiment refers to the test method designed in the soil engineering test regulations. Through the determination of the following indicators, it can be seen that the artificial soil matrix can meet the requirements of physical and mechanical properties and meet the basic conditions of the physical st...

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Abstract

The invention discloses an artificial soil matrix and a preparation method and application for the artificial soil matrix, and belongs to the field of ecological restoration in mining areas. The artificial soil matrix is made of base materials which are iron tailings and other solid waste. The artificial soil matrix, the preparation method and the application have the advantages that the base materials are appropriately processed and proportioned to obtain the artificial soil matrix by means of preparation, the artificial soil matrix is used for replacing borrowed soil which is utilized for restoring vegetation in current mining areas on a large scale in current situations, accordingly, the restoration cost for the vegetation in the mining areas can be reduced, and the solid waste can be recycled; the soil matrix is used for restoring the vegetation in the mining areas and can be used as soil for reconstructing the vegetation in the mining areas, accordingly, ecological environments in the mining areas can be improved, the problem of environmental pollution due to waste such as the iron tailings can be solved, and the artificial soil matrix, the preparation method and the application have certain social, ecological and economical benefits.

Description

technical field [0001] The invention relates to an artificial soil matrix, in particular to an artificial soil matrix with iron tailings and solid waste as main raw materials, its preparation method and application, and belongs to the field of ecological restoration in mining areas. Background technique [0002] With the construction of highways, railways, water conservancy and mining, etc., a large number of slopes need to be excavated, forming a huge number of exposed rock slopes. The formation and destruction of a large number of slopes have seriously affected the ecological environment. At present, some progress has been made in the research on slope ecological restoration technology in my country. For the ecological restoration of slopes, the commonly used ecological restoration methods are: vegetation concrete ecological slope protection technology (CBS), thick layer substrate spraying vegetation slope protection technology, rock slope Vegetative substrate ecological p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G31/00C05G3/06C05G3/70
CPCA01G24/00
Inventor 李富平张俊英许永利谷海红袁雪涛韩冬芸
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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