Neutralisation and treatment of silicahydrofluoric acid containing wastewater in high purity quartz production

A method of solid-phase neutralization of effluents (when obtaining highly pure quartz) with dry quicklime in a moving layer of material has been investigated. The use of this method will make it possible to obtain a solid granular product at the exit from the apparatus of the granulator-neutralizer, which is convenient for subsequent processing (briquetting and drying for the needs of metallurgy or sending to a landfill). The advantages of this method over the liquid phase are the exclusion from the technological scheme of operations for the preparation of milk of lime and the filtration of fine sediment, a significant reduction in the volume of waste water, and the production of flux in granular form.