Open AccessMechanochemical activation of natural and technogenic raw materials in the production of high strength plaster
Author(s) -
Vladimir Suchkov,
A.V. Veselov
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/775/1/012127
Subject(s) - gypsum , phosphogypsum , raw material , grinding , materials science , metallurgy , comminution , waste management , pulp and paper industry , environmental science , engineering , chemistry , organic chemistry
Currently, the growth of production of gypsum materials and products exceeds the economic growth of the world markets. More than 90% of binder manufactured of natural raw materials is produced of low grades, and, for production of high strength gypsum by crushed stone autoclaving, not more than 40% of extracted raw materials are used. This is due to low percentage of crushed stone of required fractions (larger than 30-50 mm) is produced from the rocks by crushing and classification. The accumulated industrial experience showed that further development of production of high grade gypsum binders is possible provided it is subject to a substantial reduction of technology, increase of productivity and reduction of fuel and energy consumption. A technology of production of gypsum binders of small fractions of gypsum rock and phosphogypsum by mechanochemical activation (MOSS) of raw materials is proposed and developed. Advantages of the suggested technology: 1. In production of high-strength gypsum binders the technology allows complete processing of raw materials, including fines generated during crushing (fraction smaller than 5 mm); 2. By changing the maximum grain size and application of MOSS, total time of heat processing (autoclaving and drying) is reduced by 2.5 – 3.04 h, which allows reducing fuel and energy consumption; 3. Operation of binder grinding after drying is excluded.