Gypsum recycling using an inclined chamber vibrating jaw crusher

Abstract The construction of new buildings and the demolition of obsolete and war-damaged buildings generate hundreds of thousands of tonnes of drywall waste. Gypsum waste, harmless in an isolated state, when thrown into a landfill causes environmental problems by polluting groundwater, emitting hydrogen sulphide and greenhouse gases. The solution of such an urgent problem, coinciding with the purpose of this work, is possible through the development of effective technological schemes and equipment for processing waste into secondary raw materials. The research on the selection of the lining plate of the jaws of the vibratory jaw crusher has been carried out on the impact bench. The dependence of effective destruction of gypsum layer of drywall on the profile of lining plates is shown. Drywall was crushed in a laboratory crusher. The innovative technological process allowed to separate the initial composite material into three constituent parts converted into secondary raw materials. The obtained results substantiate the feasibility of processing drywall waste in a vibratory jaw crusher at the place of its formation and obtaining at the same time marketable products, reducing transport costs, improving the environment and preserving mineral resources.