Production method for a wood-waste-based composite material

Abstract

The subject of the application is a method for producing a composite based on wood waste that meets fire resistance and biological corrosion resistance requirements, for use as an insulating material for building wall partitions. The method for producing a composite based on wood waste, particles of lignocellulosic material obtained from softwood, involves planing sawn timber and particles of lignocellulosic material obtained from softwood on a four-sided planer. The resulting chips are transported via a pneumatic system to a storage silo. From the silo, the chips are then transported to a sorting machine with a roller speed of 100-130, preferably 115 rpm, to obtain a chip mixture. The sorted chips are then sent to a horizontal mixer at a rate of 20 m³ / hour.then a mixture of working liquid is added, which is a mixture of water, ammonium sulfate, boric acid in the proportion of 35.3 - 41.2 : 1 - 1.53 : 0.29 - 0.41, preferably 37.2 : 1.2 : 0.35 in the amount of 25 - 35, preferably 32 liters of the mixture per 1 cubic meter of chips, then the whole is mixed at a shaft rotational speed of 2 - 5, preferably 3 min / m3 until the mixture is uniform, and then the mixture is dried at a temperature of 45°C - 60°C, preferably 55°C in a tunnel dryer to obtain a composite with the composition of 97% - 98%, preferably 98% of wood chips; 0.8% - 1%, preferably 1.5% of ammonium sulfate (NH4)2S4; 0.2% - 0.5%, preferably 0.5% boric acid H3BO3; and humidity in the range of 12% - 15%, preferably 12.5%.