Understanding the relationship between composition and rheology in alkali-activated binders

In this work, an alkali-activated binding system based on electrometallurgical slag, as well as citrogypsum, a waste of the industrial production of citric acid, was studied. Some rheological characteristics of experimental binders were considered: the nature of the mixture flow under the action of torsional loads and their initial and final setting time

Binders from gypsum-containing waste and products based on them

Gypsum binders are among the most environmentally friendly from the point of view of their production. The raw material base for their production is represented not only by natural raw materials, but also by a wide variety of technogenic materials, phosphogypsum is the most multi-ton and studied of them. At the same time, citrogypsum is also a promising raw material for the production of gypsum binders and, in comparison with phosphogypsum, does not contain toxic impurities that require the development of additional measures for their remova

Recycling and disposal of gypsum-containing waste generated in the production of citric acid

The cycle of citric acid production with the formation of gypsum-containing waste was considered and options for processing and utilization of citrogypsum were proposed. The methods obtained include: the use of citrogypsum in the production of building materials, the extraction of rare earth metals, as well as the creation of a high-quality organic-mineral fertilizer, during the creation of which it is possible to reduce the negative effect not only from the accumulation of citrogypsum, but also from manure stored in the filtration field

Cyclone design for systems processing gypsum-bearing waste

The processing of gypsum-bearing industrial waste is of great importance since its proliferation consumes valuable land and poses an environmental hazard. However, such waste is also promising for use in the production of commercial goods in various economic sectors. A uniform processing approach is impractical in view of the divergent physicochemical properties of industrial waste. The present work discusses the design of cyclones suitable for use in recycling gypsum-bearing industrial waste