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)產工(gong)藝：　原始的石(shi)灰生(sheng)產工(gong)藝是將(jiang)石(shi)灰石(shi)與燃料(liao)（木材）分層鋪放，引火煅(duan)燒(shao)一周即得(de)。現(xian)代則采(cai)用機(ji)(ji)械化、半機(ji)(ji)械化立窯(yao)(yao)以及回轉(zhuan)窯(yao)(yao)、沸騰爐等(deng)設(she)備進行生(sheng)產。煅(duan)燒(shao)時間(jian)也相(xiang)應(ying)地(di)縮短(duan)，用回轉(zhuan)窯(yao)(yao)生(sheng)產石(shi)灰僅(jin)需2～4小時，比用立窯(yao)(yao)生(sheng)產可(ke)提(ti)高(gao)生(sheng)產效(xiao)(xiao)率5倍(bei)以上。近年來，又出現(xian)了橫流式、雙(shuang)斜(xie)坡式及燒(shao)油(you)環行立窯(yao)(yao)和帶預熱(re)器的短(duan)回轉(zhuan)窯(yao)(yao)等(deng)節能效(xiao)(xiao)果顯著的工(gong)藝和設(she)備，燃料(liao)也擴大為煤、焦(jiao)炭、重油(you)或(huo)液化氣等(deng)。

生(sheng)石(shi)(shi)(shi)灰(hui)(hui)污水(shui)(shui)(shui)治(zhi)理(li)已(yi)成為關乎經濟社(she)會和(he)(he)諧發展(zhan)的(de)(de)一(yi)項重(zhong)(zhong)大問(wen)題(ti)。在(zai)控制工(gong)(gong)(gong)(gong)業(ye)污染(ran)物排(pai)放量的(de)(de)增(zeng)長方面，國家采取嚴格(ge)措施，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)對造(zao)紙、釀造(zao)、化工(gong)(gong)(gong)(gong)、印染(ran)行業(ye)，加(jia)大治(zhi)理(li)和(he)(he)改造(zao)力(li)度，淘汰高(gao)耗水(shui)(shui)(shui)、重(zhong)(zhong)污染(ran)的(de)(de)落后(hou)工(gong)(gong)(gong)(gong)藝(yi)和(he)(he)設備(bei)。我國工(gong)(gong)(gong)(gong)業(ye)化和(he)(he)城(cheng)市化進(jin)程不斷(duan)推進(jin)，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)工(gong)(gong)(gong)(gong)業(ye)廢水(shui)(shui)(shui)和(he)(he)城(cheng)市污水(shui)(shui)(shui)排(pai)放量逐年增(zeng)加(jia)，因(yin)不達(da)標排(pai)放給環境造(zao)成了巨大壓力(li)和(he)(he)危害，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)在(zai)鋼(gang)鐵、電力(li)、化工(gong)(gong)(gong)(gong)、煤炭等重(zhong)(zhong)點(dian)行業(ye)、推廣廢水(shui)(shui)(shui)循環利(li)(li)用，提(ti)高(gao)工(gong)(gong)(gong)(gong)業(ye)用水(shui)(shui)(shui)重(zhong)(zhong)復利(li)(li)用率。同時，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)工(gong)(gong)(gong)(gong)業(ye)廢水(shui)(shui)(shui)處理(li)工(gong)(gong)(gong)(gong)藝(yi)、技術(shu)不斷(duan)提(ti)高(gao)，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)給水(shui)(shui)(shui)處理(li)絮凝(ning)劑也提(ti)出了新的(de)(de)要(yao)求。