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)(sheng)產工(gong)藝(yi)：　原始(shi)的(de)(de)石灰(hui)生(sheng)(sheng)(sheng)(sheng)產工(gong)藝(yi)是將石灰(hui)石與燃(ran)料(liao)（木材）分層(ceng)鋪放，引火煅(duan)燒(shao)一周即得。現代(dai)則(ze)采用(yong)機械化(hua)、半機械化(hua)立窯(yao)(yao)以及回(hui)轉(zhuan)窯(yao)(yao)、沸騰(teng)爐等設備(bei)進行(xing)生(sheng)(sheng)(sheng)(sheng)產。煅(duan)燒(shao)時間也(ye)(ye)相應地縮短(duan)(duan)，用(yong)回(hui)轉(zhuan)窯(yao)(yao)生(sheng)(sheng)(sheng)(sheng)產石灰(hui)僅需2～4小時，比用(yong)立窯(yao)(yao)生(sheng)(sheng)(sheng)(sheng)產可提高生(sheng)(sheng)(sheng)(sheng)產效率5倍以上。近(jin)年來，又出(chu)現了橫流式、雙斜坡式及燒(shao)油(you)環行(xing)立窯(yao)(yao)和(he)帶預熱器的(de)(de)短(duan)(duan)回(hui)轉(zhuan)窯(yao)(yao)等節(jie)能(neng)效果顯著的(de)(de)工(gong)藝(yi)和(he)設備(bei)，燃(ran)料(liao)也(ye)(ye)擴大為煤、焦炭、重油(you)或液化(hua)氣等。

生(sheng)石(shi)灰(hui)(hui)污水(shui)(shui)治理(li)已成為關乎經濟(ji)社會和(he)諧發展的一項重大(da)問(wen)題(ti)。在控制(zhi)工(gong)(gong)(gong)業污染物排放量的增(zeng)長(chang)方面，國(guo)家(jia)采取(qu)嚴格措施，生(sheng)石(shi)灰(hui)(hui)對造(zao)(zao)紙、釀造(zao)(zao)、化工(gong)(gong)(gong)、印染行(xing)業，加(jia)大(da)治理(li)和(he)改(gai)造(zao)(zao)力度，淘汰高(gao)(gao)(gao)耗(hao)水(shui)(shui)、重污染的落(luo)后工(gong)(gong)(gong)藝和(he)設備。我國(guo)工(gong)(gong)(gong)業化和(he)城(cheng)市化進程不(bu)(bu)斷(duan)推進，生(sheng)石(shi)灰(hui)(hui)工(gong)(gong)(gong)業廢(fei)水(shui)(shui)和(he)城(cheng)市污水(shui)(shui)排放量逐(zhu)年增(zeng)加(jia)，因不(bu)(bu)達(da)標排放給環(huan)(huan)境(jing)造(zao)(zao)成了巨(ju)大(da)壓(ya)力和(he)危害，生(sheng)石(shi)灰(hui)(hui)在鋼鐵、電力、化工(gong)(gong)(gong)、煤炭(tan)等重點行(xing)業、推廣廢(fei)水(shui)(shui)循環(huan)(huan)利用(yong)(yong)，提(ti)高(gao)(gao)(gao)工(gong)(gong)(gong)業用(yong)(yong)水(shui)(shui)重復利用(yong)(yong)率。同時，生(sheng)石(shi)灰(hui)(hui)工(gong)(gong)(gong)業廢(fei)水(shui)(shui)處理(li)工(gong)(gong)(gong)藝、技術不(bu)(bu)斷(duan)提(ti)高(gao)(gao)(gao)，生(sheng)石(shi)灰(hui)(hui)給水(shui)(shui)處理(li)絮凝劑也提(ti)出了新(xin)的要求(qiu)。