A kind of granulation method of weathered powdery arsenic sandstone

Abstract

The invention discloses a method for pelletizing weathered powdery sandstone. The method comprises the following steps: (a) modifying collected powdery sandstone by using silica sol, and stirring to be uniform to obtain a mixture A; (b) doping a curing material and nutrients, and stirring to be uniform; (c) maintaining, curing, and smashing by using a soil smasher to obtain primary sandstone particles so as to finish primary pelletizing; (d) treating the primary sandstone particles A by using silica sol, and stirring to be uniform to obtain a mixture B; (e) doping a curing material and nutrients, and stirring to be uniform; (f) maintaining, curing, and smashing by using the soil smasher to obtain secondary sandstone particles so as to finish secondary pelletizing. According to the method for pelletizing weathered powdery sandstone provided by the invention, aggregate is formed through two times of pelletizing, so that the cohesive action among the sandstone particles and the overall erosion resistance of the sandstone are improved greatly. By applying the sandstone particles to the surface of severely-eroded soil, the erosion resistance and vegetation are improved greatly, and the water and soil loss of sandstone is prevented and controlled fundamentally.

Description

technical field [0001] The invention relates to a sandstone granulation method, in particular to a weathered powdery arsenic sandstone granulation method. Background technique [0002] Arsenic sandstone is called "the most soil erosion in the world" and "environmental cancer" by Chinese and foreign experts. It is extremely harmful to nature, ecology and the environment. It is widely distributed in the Yellow River Basin centered on the border area of ​​Shanxi, Shaanxi and Mongolia. Specifically refers to the interbedded thick sandstone, sand shale and mudstone of the Paleozoic Permian, Mesozoic Triassic, Jurassic and Cretaceous, which is the core of the sand-producing area of ​​clastic bedrock concentrated in the Loess Plateau, which is the Yellow River An important part of the sandy and coarse sandy area of ​​the river basin, it is characterized by being as hard as a rock without water, soft as mud with water, and weathered and eroded by wind. Due to the fragmented terrain...

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Problems solved by technology

[0007] It can be seen from the above that the existing measures mainly slow down the occurrence of water and soil loss of the arsenic sandstone by setting up obstacles, and cannot fundamentally improve the anti-erosion and vegetation capabilities of the arsenic sandstone itself.

Although engineering measures can quickly take effect in a short period of time and reduce soil erosion in the arsenic sandstone, they cannot improve vegetation coverage and ecological load carrying capacity, and the control effect will gradually lose with time; biological measures are a sustainable method , but the effect is slow, and it has high requirements on environmental conditions. It needs sufficient water and a stable environment. The measures of water storage and soil conservation can only be applied to areas with low soil erosion in the sandstone, but not suitable for areas with serious soil erosion. use

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