process of obtaining limestone

  • How fertilizer is made - material, production process ...

    Calcium is obtained from limestone, which contains calcium carbonate, calcium sulphate, and calcium magnesium carbonate. The magnesium source in fertilizers is derived from dolomite. Sulfur is another material that is mined and added to fertilizers.

  • Please help with this exothermic question? | Yahoo Answers

    May 15, 2010 · Best Answer: Lime (Cao) is obtained frome limestone (CaCO3) by thermal decomposition od limestone, i.e, we heat (PROVIDE energy) for this decomposition. hence this process is definitely endothermis, not exothermic. We all know that burning a fossil fuel and a radioactive decay are both exothermic.