Wastes from industries that produce materials fromwood, are widely used in various fields. In the shredded form, they found application in construction, industry and agriculture. At the same time, materials obtained as a result of processing other products are not always used. Thus, wood flour is purposefully produced for subsequent application to specific needs. Another thing is that as a raw material for its production, waste from factories and combines is often used. To date, natural raw materials are not the only and non-alternative source for building materials. However, due to the low price and satisfactory performance, crushed wood is more profitable for use for such purposes than the currently popular fiberglass products and composites.
In essence, it is a powder that is produced inresult of shredding sawdust. Traditional flour of this type has a fraction of the order of a few microns, but in some industries a size is used that allows to screen out particles through cells with a diameter of 1.23 mm. The color of flour can be different depending on the type of wood from which it was made. As a rule, chestnut and light-amber wood flour is produced. The photo below also shows an example of light flour obtained from coniferous species of wood.
With regard to the operational properties of thismaterial, it easily absorbs moisture, can easily be packed into any container, and also does not undergo chemical changes, because of what flour can be considered as a natural compound.
The basis for the production of wood flour can beperform a huge range of materials. One of the main requirements to it is naturalness. That is, if in the processing industry the products are treated with chemical compounds with protective functions, then the waste from it can not be used for making flour. Fractions and shapes can be different - for use are suitable sawdust, shavings, lump waste wood processing and chips. The more fresh raw materials, the better will be wood flour.
The use of the final product is also determinedused raw materials. So, for electrode cellulose, the performance characteristics of flour are not so important, which can not be said about the requirements for components for mortars, mastics and putties.
The process of production of wood flour is included ingroup of technological methods of processing of vegetable raw materials. The whole procedure involves several stages, the basis of which is the process of preparation, mechanical processing, screening and drying. First of all, a raw material base is created, which is sent to the processing plant. Here, wood flour is formed from chips or other waste products. The technology of production, in particular, involves the grinding of raw materials by means of a hammer, knife, finger or rotary mechanism. The choice of this or that manufacturing method is determined by the initial characteristics of the base material and the requirements for the product.
The most popular in the production of woodflour hammer crushers, which are related to impact machines. The process of destruction of the structure of the material is realized in the space between the rotor and the sieve-calibrator, from which the wood meal with a certain fraction is produced. Most often, this principle of grinding is used in enterprises that set the goal of obtaining coarse grinding from mineral raw materials. However, it is rather difficult to create a disperse powder in this way.
Treat appropriately the fibrous andThe elastic structure of wood allows an aggregate working on the principle of dynamic self-crushing. In this case, dense air flows literally squeeze the particles, resulting in the formation of wood flour. Production by this method is advantageous in that after the completion of the work process there is no need for additional measures for cleaning, washing and drying the powder material.
The material we are considering is used invarious spheres. As an additive, wood meal has found application in drilling fluids and oil wells for oil production. As a basis it is used in the production of wood-polymer composites. In the construction of flour make dry mixes and trowels. A separate category is puttying agents, in which this component is introduced as a filler.
It has already been noted that in agriculturewood flour is used. Application in this area is associated with improved soil fertility. Also, flour is used as a means for warming plants - in essence, the same mulching base is obtained.
Today there are no clear standards formaking flour from wood raw materials. This may be a powder, and a large fraction, which is used for thermal insulation. At the same time, wood flour is quite suitable for self-production. In addition to high-tech production units for grinding wood pulp, manufacturers offer small, compact devices. With the help of such a device, you can do your own hands to prepare the basis for mulching, preparing a putty mixture, and also organize a drainage filter. Do not forget that wood absorbs moisture well. This quality can be useful if the site is planned to arrange a septic or sewer system. However, for a single use of wood flour, it may not make sense to purchase a special shredding apparatus.
