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。

生產工(gong)藝(yi)：　原始的石(shi)(shi)灰(hui)(hui)生產工(gong)藝(yi)是將石(shi)(shi)灰(hui)(hui)石(shi)(shi)與燃料（木材）分(fen)層鋪放，引火煅燒(shao)一周即得。現(xian)代則采用(yong)機械化、半機械化立窯以(yi)及(ji)回(hui)轉(zhuan)窯、沸騰(teng)爐(lu)等設備進(jin)行(xing)生產。煅燒(shao)時間也相應地(di)縮短，用(yong)回(hui)轉(zhuan)窯生產石(shi)(shi)灰(hui)(hui)僅需2～4小(xiao)時，比用(yong)立窯生產可提高生產效率5倍以(yi)上(shang)。近年來(lai)，又出現(xian)了橫流式(shi)(shi)、雙(shuang)斜坡式(shi)(shi)及(ji)燒(shao)油(you)環行(xing)立窯和帶預熱器的短回(hui)轉(zhuan)窯等節(jie)能效果(guo)顯著的工(gong)藝(yi)和設備，燃料也擴(kuo)大為煤、焦炭、重油(you)或液化氣等。

生(sheng)石(shi)(shi)灰污(wu)水(shui)(shui)(shui)(shui)治理已成(cheng)為關乎經濟社會(hui)和(he)諧發展的一項(xiang)重(zhong)大問(wen)題。在控制工(gong)(gong)業(ye)污(wu)染物排(pai)放量的增(zeng)長方(fang)面(mian)，國家采取嚴格措施，生(sheng)石(shi)(shi)灰對造(zao)紙、釀造(zao)、化工(gong)(gong)、印染行業(ye)，加大治理和(he)改造(zao)力(li)度，淘汰(tai)高耗水(shui)(shui)(shui)(shui)、重(zhong)污(wu)染的落后工(gong)(gong)藝(yi)和(he)設(she)備。我國工(gong)(gong)業(ye)化和(he)城市(shi)化進程不(bu)斷(duan)推進，生(sheng)石(shi)(shi)灰工(gong)(gong)業(ye)廢(fei)水(shui)(shui)(shui)(shui)和(he)城市(shi)污(wu)水(shui)(shui)(shui)(shui)排(pai)放量逐(zhu)年增(zeng)加，因不(bu)達標排(pai)放給環(huan)(huan)境造(zao)成(cheng)了(le)巨大壓力(li)和(he)危害，生(sheng)石(shi)(shi)灰在鋼鐵、電力(li)、化工(gong)(gong)、煤炭等重(zhong)點行業(ye)、推廣廢(fei)水(shui)(shui)(shui)(shui)循環(huan)(huan)利用(yong)，提高工(gong)(gong)業(ye)用(yong)水(shui)(shui)(shui)(shui)重(zhong)復(fu)利用(yong)率。同時，生(sheng)石(shi)(shi)灰工(gong)(gong)業(ye)廢(fei)水(shui)(shui)(shui)(shui)處(chu)理工(gong)(gong)藝(yi)、技術不(bu)斷(duan)提高，生(sheng)石(shi)(shi)灰給水(shui)(shui)(shui)(shui)處(chu)理絮凝劑也提出了(le)新的要(yao)求。