Quantitative determination method for cross section porosity of loose mineral

Abstract

The invention provides a quantitative determination method for the cross section porosity of a loose mineral. The method comprises the following steps: sampling the loose mineral so as to obtain a polished section sample containing the cross section of the loose mineral; performing multipoint image collection on the polished section sample; extracting pore regions of each image by using the difference and a corresponding relationship of pores under reflected light of a polarizing microscope and the gradation of each image of the mineral by adopting a lithofacies image analysis system; calculating the specific value of the pore region area in the total area of the whole image so as to obtain the porosity; drawing a cross section porosity changing curve by measuring the porosities of the images on multiple collection points in a straight line penetrating through a whole observation surface of the polished section sample, so as to reflect the cross section porosity condition of the loose mineral. The method can be used for fast and accurately measuring and reflecting the inner porosity changing conditions of a loose mineral sample, so that accurate and effective theory data can be provided for performing a subsequent metallurgy technology.

Description

technical field [0001] The invention belongs to the technical field of metallurgical detection, and more specifically relates to a method for quantitatively measuring the cross-sectional porosity of loose minerals. Background technique [0002] The metallurgical process often has to supply air to the reaction material layer, so that the combustion reaction of solid fuel can proceed. The completeness of the combustion reaction depends on many factors, and the air permeability between mineral or spherical material layers is one of the very important factors. The combustion reaction is often carried out step by step from the outside to the inside. The flow status and change law of the gas in the material layer are directly related to the mass transfer, heat transfer and physical and chemical reaction process in the reaction process. The gas permeability of minerals not only determines whether the chemical reaction can It is completely carried out, and it can also affect the typ...

AI Technical Summary

Problems solved by technology

However, for some loose metallurgical minerals such as sintered ore and sintered slag, it is not only required to measure the porosity of the entire ore block, but also to better understand whether the air permeability uniformity of the entire ore block meets the requirements for the metallurgical process in the next step. A detailed analysis of the gas permeability inside is also required to better understand the structural distribution inside the ore block, which cannot be met by porosity measuring instruments

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