Ecological grass brick for loose sandy soil in rare earth mining area and preparation and use method of ecological grass brick

Abstract

The invention belongs to the technical field of water and soil loss treatment and soil improvement, and particularly relates to an ecological grass brick and method for a rare earth mining area. The preparation method comprises the following steps: crushing corncobs until the particle size is less than 2cm, and performing anaerobic pyrolysis at 150-180 DEG C to form corncob biomass charcoal; crushing the pine barks until the particle size is less than 5cm; uniformly mixing crushed pine barks, corncob biomass charcoal and bark fibers according to a mass ratio of 5: 3: 2 to obtain a mixed material A, and storing the mixed material A in an environment with the humidity of more than 70% for 2-3 days; mixing attapulgite, lime, a water-retaining agent and an adhesive according to a mass ratio of (35-40): (20-25): (10-15): (30-35), then mixing with water, then mixing into the mixed material A, and pressing to form an ecological grass brick with a preset shape; the ecological grass brick in the preset shape comprises a deep cutting tongue page and an extension stack, and the extension stack is connected with the top of the deep cutting tongue page to form right-angle turning extension. The ecological grass brick has the advantages that the ecological grass brick is easy to manufacture and use, waste is comprehensively utilized, the water and soil conservation effect on the loose sandy soil side slope of the rare earth mining area is good, the physical and chemical properties of sandy soil are improved, and the geological disaster risks such as landslide are counteracted.

Description

technical field [0001] The invention relates to the technical field of soil erosion and soil improvement treatment, in particular to an ecological grass brick and a method for rare earth mining areas. Background technique [0002] The description of the background technology in the present invention belongs to the related art related to the present invention, and is only used to illustrate and facilitate the understanding of the invention content of the present invention, and should not be construed as the applicant's explicit belief or presumption that the applicant believes that the present invention is the first application of the present invention. the prior art of the filing date. [0003] The ionic rare earth minerals in my country are mainly distributed in Ganzhou, Jiangxi. The mining and extraction technologies are mainly pool leaching, heap leaching and in-situ leaching. In the leaching process, a large number of high-concentration ammonium sulfate and sulfuric acid...

AI Technical Summary

Problems solved by technology

In the past, soil remediation in ion-type rare earth mining areas, vegetation restoration was mainly based on foreign soil and a small amount of restoration materials, which did not fundamentally change the prominent problems such as water retention and physical and chemical properties of sandy soil. The situation of water and soil loss has not changed, the overall repair effect is not good, and the sustainability is poor. At the same time, the soil behind the guest soil layer is lost or acidified to varying degrees, and the repair input cost is high.

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