BACKGROUND: A high-quality anhydrite binder could be produced due to the exergy of sulfuric acid in the CaCO 3 -H 2 SO 4 -H 2 O system derived from industrial wastes. Waste of sulfuric acid derived from the production of heat-resistant fibers and wastes of limestone that was formed on the metallurgical enterprise were used for the synthesis of anhydrite. Such a product is safe from an environmental point of view and has many advantages, both operational and economic, over standard gypsum binders.RESULTS: The optimal technological parameters have been established and a technological scheme for producing anhydrite excluding the stage of calcium sulfate dihydrate formation has been proposed. Anhydrite production in the CaCO 3 -H 2 SO 4 -H 2 O system, due to the exergy of sulfuric acid, is a promising technology to replace the traditional thermal technology for producing anhydrite. This technology can reduce fuel costs because the required synthesis temperature is 95-105°С, instead of 800-1000°С in the traditional one, and this significantly reduces the cost of manufactured products. CONCLUSION:The maximum yield of synthetic anhydrite was provided by a limestone suspension taken in a stoichiometric amount. This neutralizing agent makes it possible to obtain particles of a prismatic shape, the size of which is generally more than 20 ∼m.

The development of a mobile waste incineration plant designed for the recovery of garbage dumps located near towns and villages, from where the removal of garbage to the city to the incineration plant is not profitable due to the large remoteness of small settlements from the city. The installation has two combustion zones: in the 1st zone, the combustion process of solid municipal waste (MSW) is achieved at temperatures up to 600 °C, and in the second zone – up to 1200 °C. Afterburning of flue gas to reduce the formation of dioxins, furans and soot is provided.