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(sheng)(sheng)(sheng)產(chan)工(gong)藝：　原始(shi)的石(shi)灰(hui)生(sheng)(sheng)(sheng)產(chan)工(gong)藝是將(jiang)石(shi)灰(hui)石(shi)與(yu)燃料（木材）分層(ceng)鋪(pu)放，引火(huo)煅(duan)燒一周即(ji)得。現代則(ze)采用機械(xie)化(hua)、半機械(xie)化(hua)立(li)窯(yao)以(yi)及回(hui)轉窯(yao)、沸(fei)騰爐等(deng)設備(bei)進行生(sheng)(sheng)(sheng)產(chan)。煅(duan)燒時(shi)間也相應地縮短(duan)，用回(hui)轉窯(yao)生(sheng)(sheng)(sheng)產(chan)石(shi)灰(hui)僅需(xu)2～4小時(shi)，比(bi)用立(li)窯(yao)生(sheng)(sheng)(sheng)產(chan)可提(ti)高生(sheng)(sheng)(sheng)產(chan)效(xiao)率5倍以(yi)上。近年來，又出(chu)現了橫流式、雙斜坡式及燒油(you)環行立(li)窯(yao)和帶預熱(re)器的短(duan)回(hui)轉窯(yao)等(deng)節能效(xiao)果顯(xian)著的工(gong)藝和設備(bei)，燃料也擴大為煤、焦炭、重油(you)或液(ye)化(hua)氣(qi)等(deng)。

生(sheng)石(shi)(shi)(shi)灰(hui)污(wu)水(shui)治理已成為關(guan)乎(hu)經濟社會(hui)和(he)諧發展(zhan)的(de)一項重(zhong)(zhong)(zhong)大(da)問題。在控制工(gong)(gong)(gong)(gong)業(ye)(ye)污(wu)染物排(pai)放(fang)量的(de)增(zeng)長(chang)方面，國(guo)家(jia)采取(qu)嚴格(ge)措施，生(sheng)石(shi)(shi)(shi)灰(hui)對造(zao)紙、釀造(zao)、化(hua)(hua)(hua)工(gong)(gong)(gong)(gong)、印染行(xing)業(ye)(ye)，加大(da)治理和(he)改造(zao)力度，淘汰高(gao)耗(hao)水(shui)、重(zhong)(zhong)(zhong)污(wu)染的(de)落后(hou)工(gong)(gong)(gong)(gong)藝(yi)和(he)設備。我國(guo)工(gong)(gong)(gong)(gong)業(ye)(ye)化(hua)(hua)(hua)和(he)城市化(hua)(hua)(hua)進程不(bu)斷推進，生(sheng)石(shi)(shi)(shi)灰(hui)工(gong)(gong)(gong)(gong)業(ye)(ye)廢水(shui)和(he)城市污(wu)水(shui)排(pai)放(fang)量逐年增(zeng)加，因(yin)不(bu)達標(biao)排(pai)放(fang)給環境造(zao)成了(le)巨(ju)大(da)壓力和(he)危(wei)害(hai)，生(sheng)石(shi)(shi)(shi)灰(hui)在鋼鐵、電力、化(hua)(hua)(hua)工(gong)(gong)(gong)(gong)、煤炭等重(zhong)(zhong)(zhong)點(dian)行(xing)業(ye)(ye)、推廣(guang)廢水(shui)循(xun)環利(li)用(yong)，提(ti)高(gao)工(gong)(gong)(gong)(gong)業(ye)(ye)用(yong)水(shui)重(zhong)(zhong)(zhong)復利(li)用(yong)率(lv)。同時(shi)，生(sheng)石(shi)(shi)(shi)灰(hui)工(gong)(gong)(gong)(gong)業(ye)(ye)廢水(shui)處理工(gong)(gong)(gong)(gong)藝(yi)、技(ji)術不(bu)斷提(ti)高(gao)，生(sheng)石(shi)(shi)(shi)灰(hui)給水(shui)處理絮凝劑也提(ti)出了(le)新的(de)要求。