Abstract

The article presents a milled peat production practice based on deep bed drying up to a harvesting moisture content of 35%. The task of the developed technology is to minimize and stabilize the harvesting humidity in the field drying of peat, thereby reducing the time and thermal impact on the peat organic matter during a forced finish drying. The applied method of peat extraction provides for variable milling depth and differentiation of cycle harvesting to increase the number of cycles and the harvester seasonal output. An economic feasibility study has been carried out by the method of determining the operating costs per ton of a marketable product for each technological operation. It consists in a comparative assessment of two technological processes: the production practice based on intensification of milled peat drying up to a harvesting moisture content of 35% and the conventional harvesting of milled peat with moisture content of 45%. The developed technology of milled peat extraction makes it possible to ensure the required quality parameters in terms of humidity (≤ 35%) and to preserve natural bituminous components. Based on the economic assessment results, it has been found that there is a slight increase in operating costs per ton of a marketable product in comparison with the conventional practice.

Highlights

  • In the mining industries of economically developed countries, the emphasis is on the production practices that can ensure the qualitative characteristics of raw material as early as at the geotechnological stage to reduce significantly the costs of its further processing and manufacture competitive products

  • If the ash content is largely determined by natural characteristics of a peat deposit, the harvesting humidity depends entirely on the adopted peat extraction practice

  • The purpose of the economic feasibility study is to make a comparative assessment of two technological processes: the production practice based on intensification of milled peat drying up to a harvesting moisture content of 35% and the pneumatic harvesting of milled peat with moisture content of 45%

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Summary

Introduction

In the mining industries of economically developed countries, the emphasis is on the production practices that can ensure the qualitative characteristics of raw material as early as at the geotechnological stage to reduce significantly the costs of its further processing and manufacture competitive products. The technological development of fragmented peat extraction for the purpose of fuel production and raw materials for advanced chemical processing is toward intensifying the natural drying process that is focused on reducing the harvesting humidity. The purpose of the economic feasibility study is to make a comparative assessment of two technological processes: the production practice based on intensification of milled peat drying up to a harvesting moisture content of 35% (the developed method) and the pneumatic harvesting of milled peat with moisture content of 45% (current or conventional method). To conduct the economic assessment of the proposed practice of extracting milled peat with no more than 35% humidity, the methodology of determining operating costs per ton of marketable products is taken for each technological operation of the process

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