graduate student
Voronezh, Russian Federation
Russian Federation
Voronezh, Russian Federation
The purpose of the work is to develop the parameters of technological modes, the production of modified wood for sleepers, the combination of drying, impregnation and pressing operations. During the research, the following meth-ods have been used: active experiment, laboratory method for determining the size and quality characteristics of the feedstock, laboratory method for carrying out the technological process for producing modified wood. As a result of the research, the parameters of the technological modes of drying, impregnation and pressing have been worked out for the first time, combined both in place and in time. As a raw material for pressing, birch wood in the form of bar with a section of 250 × 235 mm, length of 2750 mm, humidity of 75-80%, density of 550-600 kg / m3 has been used. The main design and technical and operational characteristics of the pilot plant allow us to achieve and maintain optimal parameters of technological modes of drying, impregnation and pressing during the whole technological process of production of modified wood. The developed parameters of technological modes has formed the basis for the technical specifications for MW sleepers (modified wood), and the developed technological regulations have been recommended for the introduction into the production of sleepers from modified wood. The novelty of the results of scientific research work is development which is qualitatively new, unknown in industry, practice and literature. Optimum modes of drying, impregnation and pressing of wood are obtained: the temperature of the hot antiseptic is 120 ° C, the time of warming up and wood drying is 38 hours, the impregnation time is 4 hours, the pressing time is 17 hours, the specific pressure is 0.8 MPa, the cooling time is 6 hours, the degree of pressing is 22 %. It is recommended to use the obtained modes for introduction into production to produce railway sleepers from modified wood with improved performance indicators: density - 700 kg / m3, humidity - 22%, compressive strength along the fibers - 41.5 MPa, impregnation depth across the fibers - 5.5 mm, from the end part - 110 mm.
impregnation, drying, pressing, pilot plant, operating modes, oily antiseptic
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