Energy consumptions in the process of preparation of wood-fiber semi-finished products when manufacturing wood-fiber boards
The results have been presented for the specific consumption of electric power which is consumed when preparing (grinding) wood-fiber semi-finished products in high-speed disk mills, using water and steam and dry milling process, using a rotary cutter machine in which grinding is carried out in air. In the knife grinding machines of various types the grinding process for the wood-fiber substance depends on technological and design parameters of machines with all other things being equal. Morphological properties of fibers, in turn, also have a significant effect on the properties, productivity and specific energy consumption of the finished product. As a result, the regime and the grinding conditions largely determine the quality and size-morphological characteristics of wood-fiber semi-finished products. The reliability of the work results has been provided by using a complex of modern complementary physical, statistical and mathematical research methods, as well as laboratory and production tests, by carrying out numerous experiments, a high convergence of the calculated and experimental results, harmonization of approaches to the process of preparation of wood materials with general scientific terms, the statistical processing of the research results. The objective of the article is to evaluate the specific consumption of electricity consumed when preparing wood-fiber semi-finished products by using different grinding equipment. As it is known, specific power consumption spent on the preparation of wood-fiber semi-finished products when manufacturing wood-fiber boards is one of the criterion, defining their pricing. In this regard, the following tasks have been set: to determine the optimum technical and design parameters for different types of grinding machines which make specific energy consumption have a minimum value; to carry out a comparative analysis of equipment; to offer a scientific foundation for the choice of grinding equipment, which are obtained by using wood-fiber semi-finished products, by giving size- quality performance with the lowest power consumption, all other things being equal.