A Resources and Energy-Conserving Technology for Recycling and Optimal Utilization of Metal-Bearing Wastes by: V.P. Bobylev. A concept enabling cleaner production units and multi-branch industrial centers is put forward. An individual process is regarded as an elementary environmental modulus, and a set of moduli making a complex is so selected that due to its internal and external links no waste is generated. The internal links follow the donor-recipient model, so that semiproducts or waste products of one process are used as starting materials or catalysts in another. When these require preprocessing, an additional environmentally clean process is introduced as an internal-link modulus. This procedure can be reiterated to design a multi-branch industrial center. The mining and metallurgy in Ukraine generate a total of 210 Mt wastes annually. More than 150,000 hectares of land is allocated to store much of these, mostly in the form of oxide slurries. A novel technology for their reuse includes pelletizing and hardening via carbonization and hydration. The technology has been tested on many types of slurry to recycle metal-bearing wastes and/or produce filter and sorbent materials of preset porosity and composition well suited for industrial water treatment. The process also uses muddy water from the slurry ponds and flue gases of oxygen blown converters, thus recovering part of the constituent carbon dioxide.
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