Intensification of humic acid extraction from lignites

Tatiana Moskalenko,Valery Mikheev,Elena Vorsina,I Rasskazov,S Tkach

doi:10.1051/e3sconf/202019202024

Abstract

One of the methods of initial properties of solid fuels changing by their organic mass oxidation is considered in the paper. Creation of innovative ways of intensification of existing solid fuels processing and their adoption by industry has always been and remains an actual task. Thus the chemical process is the most important stage of raw materials processing into target products. Chemical exposure allows to optimize the technological mode, expanding the scope of control of technological process parameters and, to a certain extent, modify the properties of the resulting products. The article presents the results of experimental research of influence of preliminary oxidation on the lignite organic mass from Kharanorsk and Kangalas deposits by different chemical reagents to determine a degree of this process impact on the efficiency of their processing into humic substances. Inorganic and organic oxidizers of different concentrations were used as reagents. The greatest effect for increasing the humic acids yield was observed when using 6-10 % hydrogen peroxide for oxidation, and 10 % hydrochloric acid. The results of experiments on the coal preoxidation effect can be used as a basis for the development of a new method of lignites processing into humic substances.

Highlights

Creation of innovative ways for intensification of existing solid fossil fuels processing and its introduction in the industry has always been and remains an actual task
The aim of the work was to determine a degree of influence of preliminary oxidation of lignite organic mass on the efficiency of its processing into humic substances
The experiments have shown that oxidation by strong and weak inorganic acids is more effective for the Kharanorsk lignite than by organic acids of the same concentration, and only in some cases there was a slight increase in humic acids yield with exposure time increasing from 1 to 24 hours

Summary

Introduction

Creation of innovative ways for intensification of existing solid fossil fuels processing and its introduction in the industry has always been and remains an actual task. The chemical process is the most important stage of raw materials processing into target products. Chemicals effect makes it possible to optimize the technological mode, expand the scope of process parameter control and modify the resulting products properties to a certain extent. It is important for processing industries modernization and development of advanced mineral processing [1]. To reduce the losses is the main task of developing new processing methods, including coal material processing into humic substances.

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Conclusion