Procedure for the manufacture of magnetic oxide or, respectively, magnesium hydroxide of raw materials containing mg. (Machine-translation by Google Translate, not legally binding)

摘要

Procedure for the manufacture of magnesium oxide or, respectively, magnesium hydroxide of raw materials containing Mg, characterized in that a suspension of ground raw material containing MG in a solution of MgSO4, whose content of sulfate ions is at least equal to those Calcium ions introduced from the raw material, is treated at low temperatures up to 300ºC, preferably from 10 - 25ºC under refrigeration with SO2, releasing CO2 from the raw material, the Mg (HSO3) 2 solution formed being separated from the gypsum formed Simultaneously and from the insoluble residue and transformed Mg (HSO3) 2 dissolved in Ca-free and insoluble neutral MgSO hydrate, in particular trihydrate, which is separated from the mother liquor, dehydrated and decomposed at temperatures of approximately 500-1000ºC to form MgO and/or Mg (OH) 2 by precipitating and recovering SO2. (Machine-translation by Google Translate, not legally binding)