Assertion: arsenic acid's temperature | /r/HasProperty | 800 – 850 °c
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Source sentences:
text: A number of different roasting technologies vary this two‐stage scheme by fixing a large part of the arsenic as iron arsenate instead of As 2 O 3 (METBA process); by applying a multiple‐hearth furnace for the first stage (Mechim process); by roasting at higher temperatures (800 – 850 °C ) in the first stage and thus oxidizing the pyrite to pyrrhotite or magnetite, which is further oxidized to hematite in the second stage (Boliden process and BASF process); and by extending the roasting process to a third stage (Montedison process) (8, 15, 23, 24, 26-28).