碳(tan)酸(suan)鈣是(shi)(shi)一種無(wu)機化合物，化學式為CaCO?，俗稱(cheng)灰石(shi)(shi)(shi)(shi)(shi)(shi)(shi)、石(shi)(shi)(shi)(shi)(shi)(shi)(shi)灰石(shi)(shi)(shi)(shi)(shi)(shi)(shi)、石(shi)(shi)(shi)(shi)(shi)(shi)(shi)粉(fen)、大理石(shi)(shi)(shi)(shi)(shi)(shi)(shi)等。碳(tan)酸(suan)鈣呈中性，基(ji)本上不溶于(yu)水，溶于(yu)鹽(yan)酸(suan)。它是(shi)(shi)地球(qiu)上常見物質之一，存(cun)在于(yu)霰石(shi)(shi)(shi)(shi)(shi)(shi)(shi)、方解(jie)石(shi)(shi)(shi)(shi)(shi)(shi)(shi)、白堊(e)、石(shi)(shi)(shi)(shi)(shi)(shi)(shi)灰巖、大理石(shi)(shi)(shi)(shi)(shi)(shi)(shi)、石(shi)(shi)(shi)(shi)(shi)(shi)(shi)灰華(hua)等巖石(shi)(shi)(shi)(shi)(shi)(shi)(shi)內，亦為動(dong)物骨骼(ge)或外殼(ke)的主要成分。碳(tan)酸(suan)鈣也是(shi)(shi)重要的建(jian)筑材料，工業(ye)上用(yong)途(tu)甚(shen)廣。

海南碳酸鈣價格由(you)于重(zhong)(zhong)質(zhi)(zhi)碳酸(suan)鈣(gai)的(de)沉降(jiang)體(ti)積(ji)比輕(qing)質(zhi)(zhi)碳酸(suan)鈣(gai)的(de)沉降(jiang)體(ti)積(ji)小，所以稱之為重(zhong)(zhong)質(zhi)(zhi)碳酸(suan)鈣(gai)。性質(zhi)(zhi)：白色粉(fen)末。無(wu)臭、無(wu)味。露置空氣中無(wu)變化(hua)，比重(zhong)(zhong)2.710。熔(rong)點1339℃。幾乎不(bu)溶(rong)于水(shui)(shui)在含有銨鹽或三氧化(hua)二(er)鐵(tie)的(de)水(shui)(shui)中溶(rong)解，不(bu)溶(rong)于醇。遇(yu)稀(xi)醋酸(suan)、稀(xi)鹽酸(suan)、稀(xi)硝(xiao)酸(suan)發生(sheng)泡沸，并溶(rong)解。加熱分(fen)解為氧化(hua)鈣(gai)(CaO)和二(er)氧化(hua)碳(CO?)。采用不(bu)同粉(fen)碎(sui)加工設備，可生(sheng)產出：400目(mu)(mu)(mu)、500目(mu)(mu)(mu)、600目(mu)(mu)(mu)、800目(mu)(mu)(mu)、1000目(mu)(mu)(mu)、1250目(mu)(mu)(mu)、2500目(mu)(mu)(mu)、5000目(mu)(mu)(mu)各種(zhong)粒徑的(de)重(zhong)(zhong)質(zhi)(zhi)碳酸(suan)鈣(gai)，又因造紙、涂料、顏料的(de)特(te)種(zhong)需(xu)要還可以研(yan)磨生(sheng)成2μm以下重(zhong)(zhong)質(zhi)(zhi)鈣(gai)。