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)產工藝(yi)：　原始的(de)石(shi)(shi)灰生(sheng)(sheng)(sheng)產工藝(yi)是將石(shi)(shi)灰石(shi)(shi)與燃料（木材）分層鋪放，引(yin)火煅燒(shao)一周即(ji)得。現(xian)代則采用(yong)機械化(hua)、半(ban)機械化(hua)立窯(yao)(yao)(yao)以及回轉窯(yao)(yao)(yao)、沸騰爐等設備(bei)進行生(sheng)(sheng)(sheng)產。煅燒(shao)時(shi)(shi)間也(ye)相應(ying)地(di)縮(suo)短，用(yong)回轉窯(yao)(yao)(yao)生(sheng)(sheng)(sheng)產石(shi)(shi)灰僅需(xu)2～4小(xiao)時(shi)(shi)，比用(yong)立窯(yao)(yao)(yao)生(sheng)(sheng)(sheng)產可提(ti)高生(sheng)(sheng)(sheng)產效率5倍(bei)以上。近年來，又出(chu)現(xian)了(le)橫流式、雙斜坡式及燒(shao)油(you)(you)環行立窯(yao)(yao)(yao)和帶預(yu)熱器的(de)短回轉窯(yao)(yao)(yao)等節能效果顯著的(de)工藝(yi)和設備(bei)，燃料也(ye)擴(kuo)大為煤、焦炭、重油(you)(you)或液化(hua)氣等。

生(sheng)石(shi)灰(hui)(hui)(hui)污(wu)水(shui)(shui)治(zhi)理已成(cheng)為關乎經濟(ji)社會和(he)(he)諧發展(zhan)的一(yi)項重(zhong)(zhong)大(da)問題。在控制工(gong)(gong)業污(wu)染(ran)(ran)物排放(fang)量(liang)的增長方面(mian)，國(guo)家采取嚴格措施，生(sheng)石(shi)灰(hui)(hui)(hui)對造(zao)紙、釀(niang)造(zao)、化工(gong)(gong)、印染(ran)(ran)行業，加(jia)大(da)治(zhi)理和(he)(he)改造(zao)力度，淘汰高耗水(shui)(shui)、重(zhong)(zhong)污(wu)染(ran)(ran)的落后工(gong)(gong)藝和(he)(he)設備。我國(guo)工(gong)(gong)業化和(he)(he)城(cheng)市(shi)化進程不斷(duan)(duan)推進，生(sheng)石(shi)灰(hui)(hui)(hui)工(gong)(gong)業廢(fei)水(shui)(shui)和(he)(he)城(cheng)市(shi)污(wu)水(shui)(shui)排放(fang)量(liang)逐(zhu)年增加(jia)，因不達標(biao)排放(fang)給(gei)環境造(zao)成(cheng)了巨大(da)壓力和(he)(he)危(wei)害，生(sheng)石(shi)灰(hui)(hui)(hui)在鋼(gang)鐵、電(dian)力、化工(gong)(gong)、煤炭(tan)等重(zhong)(zhong)點行業、推廣廢(fei)水(shui)(shui)循環利用，提高工(gong)(gong)業用水(shui)(shui)重(zhong)(zhong)復(fu)利用率(lv)。同時，生(sheng)石(shi)灰(hui)(hui)(hui)工(gong)(gong)業廢(fei)水(shui)(shui)處(chu)理工(gong)(gong)藝、技術(shu)不斷(duan)(duan)提高，生(sheng)石(shi)灰(hui)(hui)(hui)給(gei)水(shui)(shui)處(chu)理絮凝劑也提出(chu)了新的要(yao)求(qiu)。