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(gong)藝(yi)：　原始(shi)的(de)石(shi)灰(hui)生(sheng)(sheng)(sheng)產工(gong)藝(yi)是將石(shi)灰(hui)石(shi)與燃料(liao)（木材）分層鋪放，引火(huo)煅(duan)燒(shao)一(yi)周(zhou)即得。現代則采用機械(xie)化(hua)、半機械(xie)化(hua)立(li)窯以及(ji)回轉(zhuan)(zhuan)窯、沸騰爐等(deng)設備進(jin)行(xing)生(sheng)(sheng)(sheng)產。煅(duan)燒(shao)時(shi)間也(ye)相應地縮短，用回轉(zhuan)(zhuan)窯生(sheng)(sheng)(sheng)產石(shi)灰(hui)僅需2～4小時(shi)，比用立(li)窯生(sheng)(sheng)(sheng)產可提高生(sheng)(sheng)(sheng)產效率5倍以上(shang)。近(jin)年來，又(you)出(chu)現了橫(heng)流(liu)式(shi)(shi)、雙斜(xie)坡式(shi)(shi)及(ji)燒(shao)油(you)環行(xing)立(li)窯和帶預(yu)熱器的(de)短回轉(zhuan)(zhuan)窯等(deng)節能效果顯著的(de)工(gong)藝(yi)和設備，燃料(liao)也(ye)擴大為煤、焦炭(tan)、重油(you)或(huo)液(ye)化(hua)氣等(deng)。

生(sheng)石(shi)灰(hui)(hui)污(wu)水(shui)(shui)(shui)(shui)治理已(yi)成為關乎經濟社會和(he)(he)諧發展的(de)一項重(zhong)大(da)問題(ti)。在(zai)控(kong)制工(gong)(gong)業(ye)污(wu)染(ran)物排(pai)放量(liang)的(de)增長(chang)方(fang)面，國家采取嚴格措(cuo)施，生(sheng)石(shi)灰(hui)(hui)對(dui)造(zao)(zao)紙、釀造(zao)(zao)、化工(gong)(gong)、印染(ran)行業(ye)，加(jia)大(da)治理和(he)(he)改造(zao)(zao)力度，淘汰高耗水(shui)(shui)(shui)(shui)、重(zhong)污(wu)染(ran)的(de)落后(hou)工(gong)(gong)藝和(he)(he)設備(bei)。我(wo)國工(gong)(gong)業(ye)化和(he)(he)城市(shi)化進程不(bu)斷推(tui)進，生(sheng)石(shi)灰(hui)(hui)工(gong)(gong)業(ye)廢(fei)水(shui)(shui)(shui)(shui)和(he)(he)城市(shi)污(wu)水(shui)(shui)(shui)(shui)排(pai)放量(liang)逐年增加(jia)，因不(bu)達標排(pai)放給(gei)環(huan)境造(zao)(zao)成了巨大(da)壓力和(he)(he)危害，生(sheng)石(shi)灰(hui)(hui)在(zai)鋼鐵、電力、化工(gong)(gong)、煤(mei)炭等重(zhong)點行業(ye)、推(tui)廣(guang)廢(fei)水(shui)(shui)(shui)(shui)循環(huan)利用(yong)(yong)，提高工(gong)(gong)業(ye)用(yong)(yong)水(shui)(shui)(shui)(shui)重(zhong)復利用(yong)(yong)率。同時，生(sheng)石(shi)灰(hui)(hui)工(gong)(gong)業(ye)廢(fei)水(shui)(shui)(shui)(shui)處(chu)理工(gong)(gong)藝、技(ji)術不(bu)斷提高，生(sheng)石(shi)灰(hui)(hui)給(gei)水(shui)(shui)(shui)(shui)處(chu)理絮凝劑也(ye)提出了新的(de)要求。