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)(chan)工(gong)藝(yi)：　原始(shi)的石(shi)灰生(sheng)(sheng)(sheng)產(chan)(chan)工(gong)藝(yi)是將石(shi)灰石(shi)與(yu)燃料（木材）分層鋪放，引火煅(duan)(duan)燒(shao)(shao)一周即得(de)。現(xian)代則采用(yong)機械化、半(ban)機械化立(li)窯以及(ji)(ji)回轉窯、沸騰爐等設備進行生(sheng)(sheng)(sheng)產(chan)(chan)。煅(duan)(duan)燒(shao)(shao)時間(jian)也(ye)相應地(di)縮短，用(yong)回轉窯生(sheng)(sheng)(sheng)產(chan)(chan)石(shi)灰僅需2～4小時，比用(yong)立(li)窯生(sheng)(sheng)(sheng)產(chan)(chan)可提高(gao)生(sheng)(sheng)(sheng)產(chan)(chan)效率(lv)5倍以上。近年來(lai)，又出現(xian)了(le)橫(heng)流式、雙斜坡式及(ji)(ji)燒(shao)(shao)油(you)(you)環行立(li)窯和帶預熱器的短回轉窯等節能(neng)效果顯著的工(gong)藝(yi)和設備，燃料也(ye)擴大為煤(mei)、焦炭、重油(you)(you)或(huo)液(ye)化氣等。

生(sheng)石(shi)(shi)灰污(wu)(wu)(wu)水(shui)(shui)治(zhi)理(li)已(yi)成為關乎(hu)經濟(ji)社會和(he)(he)諧發(fa)展(zhan)的(de)一項重大(da)問題。在控制(zhi)工(gong)(gong)(gong)業(ye)(ye)(ye)污(wu)(wu)(wu)染物排放(fang)量的(de)增長方面，國(guo)家采取(qu)嚴格措施，生(sheng)石(shi)(shi)灰對(dui)造(zao)紙(zhi)、釀造(zao)、化(hua)工(gong)(gong)(gong)、印(yin)染行(xing)業(ye)(ye)(ye)，加大(da)治(zhi)理(li)和(he)(he)改造(zao)力度，淘汰(tai)高耗(hao)水(shui)(shui)、重污(wu)(wu)(wu)染的(de)落后(hou)工(gong)(gong)(gong)藝和(he)(he)設備。我國(guo)工(gong)(gong)(gong)業(ye)(ye)(ye)化(hua)和(he)(he)城(cheng)市化(hua)進程(cheng)不斷(duan)推進，生(sheng)石(shi)(shi)灰工(gong)(gong)(gong)業(ye)(ye)(ye)廢水(shui)(shui)和(he)(he)城(cheng)市污(wu)(wu)(wu)水(shui)(shui)排放(fang)量逐年增加，因不達標排放(fang)給環(huan)境造(zao)成了(le)巨大(da)壓力和(he)(he)危害，生(sheng)石(shi)(shi)灰在鋼鐵、電力、化(hua)工(gong)(gong)(gong)、煤(mei)炭等重點(dian)行(xing)業(ye)(ye)(ye)、推廣(guang)廢水(shui)(shui)循環(huan)利(li)用(yong)，提高工(gong)(gong)(gong)業(ye)(ye)(ye)用(yong)水(shui)(shui)重復利(li)用(yong)率。同時，生(sheng)石(shi)(shi)灰工(gong)(gong)(gong)業(ye)(ye)(ye)廢水(shui)(shui)處理(li)工(gong)(gong)(gong)藝、技(ji)術不斷(duan)提高，生(sheng)石(shi)(shi)灰給水(shui)(shui)處理(li)絮凝劑也提出(chu)了(le)新(xin)的(de)要求。