Soil sample preparation method and device

Abstract

The invention provides a soil sample preparation method and device. The method comprises the following steps of obtaining original soil, carrying out the preliminary screening of the original soil, and obtaining preliminarily screened soil, measuring the moisture content p of the primarily screened soil, measuring the particle size r of primarily screened soil, calculating first time T1 = a1p<2> +a2p + a3 and drying temperature D = b1p + b2, calculating the second time T2 = c1r + c2 and the grinding rotating speed W = d1r<2> + d2r + d3, calculating third time T3 = e1 / p + e2 / r + e3 and tabletting pressure N = (f1 / p + f2 / r + f3)*s, drying the primarily screened soil at a drying temperature D for the first time T1 to obtain dried soil, grinding the dried soil at a grinding rotating speed W for the second time T2 to obtain ground soil, collecting the ground soil to obtain a first soil sample, tabletting the ground soil at a tabletting pressure N for the third time T3 to obtain a second soil sample. Through the steps, mismatching of soil with set grinding, drying and tabletting processes can be avoided, the quality and efficiency of soil samples can be improved, and resources can be saved.

Description

technical field [0001] The present disclosure generally relates to the technical field of soil sample preparation, and specifically relates to a soil sample preparation method and device. Background technique [0002] Soil sample preparation refers to the process of collecting raw soil from the outside, and then going through the process of mixing, drying, grinding and sieving. [0003] In traditional methods, soil samples are often prepared manually and mechanically; manual preparation of soil samples has disadvantages such as long processing period, low preparation efficiency, and easy cross-contamination of samples; [0004] For mechanical preparation, the soil is usually screened through a filter screen, heated by a heating device, ground by a grinding device, and finally pressed into tablets to obtain a soil sample; in this way, as the soil sample is continuously prepared, due to the original There are differences in soil, that is, there are large differences in the am...

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Problems solved by technology

[0003] In traditional methods, soil samples are often prepared manually and mechanically; manual preparation of soil samples has disadvantages such as long processing cycle, low preparation efficiency, and easy cross-contamination of samples;

[0004] For mechanical preparation, the soil is usually screened through a filter screen, heated by a heating device, ground by a grinding device, and finally pressed into tablets to obtain a soil sample; in this way, with the continuous preparation of the soil sample, due to the original There are differences in soil, that is, there are large differences in the amount of original soil moisture and soil particle size, resulting in the drying, grinding and tableting process, such as drying time, drying temperature, grinding time, tableting time, etc. Humidity and particle size mismatch; on the one hand, when drying, grinding, and tableting are insufficient, it will have a great impact on the detection of later soil samples; on the other hand, excessive drying, grinding, and tableting will cause insufficient electrical resources. Necessary waste, increased preparation costs

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