THE RESEARCH OF THE EFFECT OF GRINDING DEGREE ON PROCESS OF ACID DECOMPOSITION OF PROSPHORITES

The research of the effect of raw material grinding degree on a decomposition process of aluminium and iron containing prosphorites with the use of phosphoric and sulphatic acids has been conducted. It has been shown that in the interval of 40-800С the decomposition degree of the phosphate part of phosphorites is rising up with the rise of grinding degree. The decomposition degree of the of admixtures which contain sesquialteral oxides of iron and aluminium depends on the chemical and mineralogical composition of raw materials.