海南生石灰粉主要成分為氧化鈣，通常制法為將主要成分為碳酸鈣的天然巖石，在高溫下煅燒，即可分解生成二氧化碳以及氧化鈣（化學式：CaO，即生石灰，又稱云石）。凡是以碳酸鈣為主要成分的天然巖石，如石灰巖、白堊、白云質石灰巖等，都可用來生產石灰。在沿海地區有用貝殼作原料，經燒制成殼灰，作生石灰用。

生產(chan)(chan)工藝(yi)：　原始的(de)(de)石灰(hui)生產(chan)(chan)工藝(yi)是(shi)將石灰(hui)石與燃(ran)料（木(mu)材）分層鋪放，引(yin)火煅燒(shao)一周即得(de)。現(xian)代則采(cai)用(yong)機(ji)(ji)械化(hua)、半(ban)機(ji)(ji)械化(hua)立窯(yao)(yao)以及回(hui)(hui)轉(zhuan)窯(yao)(yao)、沸騰爐等(deng)設備(bei)(bei)進行生產(chan)(chan)。煅燒(shao)時間也相應(ying)地縮短，用(yong)回(hui)(hui)轉(zhuan)窯(yao)(yao)生產(chan)(chan)石灰(hui)僅需2～4小時，比用(yong)立窯(yao)(yao)生產(chan)(chan)可提高生產(chan)(chan)效(xiao)率5倍以上。近年來，又出(chu)現(xian)了橫流式(shi)、雙(shuang)斜(xie)坡式(shi)及燒(shao)油(you)環(huan)行立窯(yao)(yao)和(he)帶預熱器的(de)(de)短回(hui)(hui)轉(zhuan)窯(yao)(yao)等(deng)節能效(xiao)果顯著(zhu)的(de)(de)工藝(yi)和(he)設備(bei)(bei)，燃(ran)料也擴大為煤、焦(jiao)炭、重油(you)或液化(hua)氣(qi)等(deng)。

生石灰污(wu)水治(zhi)理已成(cheng)為關乎經濟社會和(he)(he)諧(xie)發展(zhan)的(de)(de)一項重(zhong)(zhong)大問題。在控制工(gong)(gong)(gong)(gong)(gong)業(ye)污(wu)染物排(pai)(pai)放(fang)量的(de)(de)增(zeng)長方(fang)面，國(guo)家采取(qu)嚴(yan)格措施，生石灰對造(zao)紙、釀造(zao)、化(hua)(hua)工(gong)(gong)(gong)(gong)(gong)、印染行業(ye)，加大治(zhi)理和(he)(he)改(gai)造(zao)力(li)度，淘汰高(gao)耗水、重(zhong)(zhong)污(wu)染的(de)(de)落后工(gong)(gong)(gong)(gong)(gong)藝和(he)(he)設備。我國(guo)工(gong)(gong)(gong)(gong)(gong)業(ye)化(hua)(hua)和(he)(he)城市化(hua)(hua)進(jin)程不(bu)斷推進(jin)，生石灰工(gong)(gong)(gong)(gong)(gong)業(ye)廢水和(he)(he)城市污(wu)水排(pai)(pai)放(fang)量逐年增(zeng)加，因不(bu)達標排(pai)(pai)放(fang)給環境造(zao)成(cheng)了巨(ju)大壓力(li)和(he)(he)危害，生石灰在鋼鐵、電力(li)、化(hua)(hua)工(gong)(gong)(gong)(gong)(gong)、煤炭等(deng)重(zhong)(zhong)點行業(ye)、推廣廢水循環利(li)用，提(ti)高(gao)工(gong)(gong)(gong)(gong)(gong)業(ye)用水重(zhong)(zhong)復利(li)用率。同時，生石灰工(gong)(gong)(gong)(gong)(gong)業(ye)廢水處理工(gong)(gong)(gong)(gong)(gong)藝、技術不(bu)斷提(ti)高(gao)，生石灰給水處理絮凝劑也提(ti)出了新的(de)(de)要求。