The project aims to solve the following main problems: 1. Utilization and recycling of industrial waste from domestic silicon production (dust of microsilica) of the Republic of Kazakhstan "Tau-Ken Temir" contribute to the improvement of the environmental situation in the Karaganda region and sanitary and environmental conditions at the silicon production itself. At the same time, the problem of irrational use of natural resources of the Republic of Kazakhstan and primary raw materials will be solved; 2. The production of our own expensive and scarce silicon carbide compound (in demand not only in Kazakhstan but also abroad) from silicon production waste will reduce the state's economic costs for importing this compound. The import of silicon carbide from other countries to the territory of the Republic of Kazakhstan for production needs will be reduced. Thus, the problem of import substitution and the design of our own domestic technology for the production of silicon carbide from secondary raw materials will be solved; 3. Development of principles for processing silicon production waste to obtain innovative composite materials of different compositions (recipes) with the required set of mechanical properties. The solution of these problems and further implementation of the specified technologies will allow the Republic of Kazakhstan to move to the program adopted in economically developed countries, which assumes the transition from a linear economy to a circular one with a closed production cycle, where the mandatory part is the processing of waste for its reuse. The experience of many advanced countries demonstrates the full technical feasibility of such processes and their effect - the protection of nature, ecology, water and land resources from pollution.

Development of scientific foundations and methodology for recycling silicon production waste in order to utilize industrial waste and create innovative composite materials based on it.

Based on the conducted analysis of scientific, technical and patent literature, a concept (criteria, principles, methods) will be developed for organizing a resource-saving technology (process) for recycling and utilization of silicon production waste to obtain innovative composite materials. Study, analysis and preparation of raw materials - waste from silicon production, silicon dioxide (microsilica), as raw materials by extracting or isolating the required fraction of the raw material and creating possible recipes. Obtaining materials (test samples) from silicon production waste – silicon dioxide (microsilica) with various binders. Establishing optimal technological parameters and modes for the process of obtaining silicon carbide, as well as developing a complex based on innovative composite materials (selection of the best experimental samples) from silicon production waste. Conducting physical, chemical and mechanical tests of the obtained innovative composite materials and silicon carbide (selection of the best prototypes). The research results will be presented at an international conference in Kazakhstan. 1 (one) article will be published in journals from the first three quartiles with an impact factor in the Web of Science database and/or having a CiteScore percentile in the Scopus database of at least 50 and 1 (one) article in a peer-reviewed foreign or domestic publication recommended by the Committee on the Review of Scientific and Technical Education of the Ministry of Education and Science of the Republic of Kazakhstan. Tests on heat treatment of the obtained innovative composite materials (pilot samples). Testing and comparative analysis of innovative composite materials and silicon carbide obtained within the framework of the project with existing composite materials on the market and traditional analogous materials; Construction of a new complex (combined) waste-free technology for the utilization and processing of industrial waste from silicon production in order to obtain innovative composite materials and silicon carbide. 1 (one) article will be published in journals from the first three quartiles with an impact factor in the Web of Science database and/or having a CiteScore percentile in the Scopus database of at least 50.

1)A systematic review of domestic and international sources on the processing of waste from silicon production has been conducted. The analysis identified current trends in the recycling of microsilica and other by-products, as well as gaps in existing research and technologies linked to the lack of a comprehensive approach to their utilisation. Particular attention was paid to patent developments reflecting practical approaches to the implementation of innovative solutions in construction, metallurgy and materials science. Based on the collected data, a concept for a resource-saving recycling technology has been developed, incorporating key criteria (environmental friendliness, economic efficiency), principles and methods for organising the waste utilisation process to produce innovative composite materials with improved performance properties. 2) The Karaganda Silicon Plant, operated by Tau-Ken Temir LLP, is one of the leading manufacturers of silicon products not only in Kazakhstan but also beyond its borders. The production of metallic silicon generates a significant amount of dust waste — between 300 and 900 kg per tonne of silicon smelted — which has a negative impact on the environment and human health. The use of alternative types of ore raw materials is limited due to their high dust generation, which exacerbates the environmental problems of production. In this regard, the task of utilising, minimising and re-introducing dust waste into the production cycle becomes particularly relevant. Implementing these measures will not only reduce the anthropogenic impact on the environment but also improve the resource efficiency of production. As part of this work, a study was conducted on the waste from silicon production at Tau-Ken Temir LLP (Karaganda region). Their chemical and mineralogical composition was determined using modern analytical methods, and their physical-mechanical and technological properties were established. It was found that the main component of the waste is amorphous silicon dioxide (SiO₂) with a content of over 90%, and impurities of aluminium, calcium and iron oxides were also identified. Studies of the particle size distribution have shown that the waste particles are predominantly micro- and nanoscale, which increases their reactivity and the feasibility of their further application. 3)As part of this research area, an experimental process for recycling waste from silicon production was developed. The main focus was on creating innovative composite materials with enhanced physical, mechanical and performance characteristics. In the first stage, prior to fractionation, the microsilica powder was subjected to preliminary mechanical treatment in a Retsch MM 400 vibratory mill to activate the particle surfaces and increase their reactivity. Subsequently, a 100 g sample of microsilica was separated into fractions of 45–63 µm and less than 45 µm using a Retsch AS 200 control analytical laboratory sieve shaker. X-ray fluorescence analysis (XRF) was used to determine the chemical composition and elemental content in the various microsilica fractions. The powders obtained from these fractions were thoroughly mixed with various binders (liquid glass, epoxy adhesive, polyester resin) and fillers (cement, glass fibre), ensuring uniform particle distribution throughout the resulting material. After mixing, the compositions were moulded by hand in metal crucibles and left to cure completely for 24 hours. The developed technology ensures the effective use of microsilica as a secondary raw material, helps to reduce the volume of industrial waste from silicon production, and forms the basis for the production of innovative composite materials with improved performance properties