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(chan)(chan)工(gong)(gong)藝(yi)(yi)：　原始的(de)(de)石(shi)灰生產(chan)(chan)工(gong)(gong)藝(yi)(yi)是將(jiang)石(shi)灰石(shi)與燃料（木(mu)材）分層(ceng)鋪放(fang)，引火煅燒一(yi)周即得。現(xian)代則采用(yong)機(ji)械化(hua)、半機(ji)械化(hua)立(li)窯(yao)(yao)以(yi)及回(hui)轉(zhuan)窯(yao)(yao)、沸(fei)騰爐等設(she)(she)備進行(xing)生產(chan)(chan)。煅燒時間(jian)也相應地縮短，用(yong)回(hui)轉(zhuan)窯(yao)(yao)生產(chan)(chan)石(shi)灰僅(jin)需(xu)2～4小時，比(bi)用(yong)立(li)窯(yao)(yao)生產(chan)(chan)可提高(gao)生產(chan)(chan)效率5倍(bei)以(yi)上。近(jin)年來，又出現(xian)了(le)橫流式、雙(shuang)斜坡式及燒油(you)環行(xing)立(li)窯(yao)(yao)和(he)帶預熱器的(de)(de)短回(hui)轉(zhuan)窯(yao)(yao)等節(jie)能效果(guo)顯著的(de)(de)工(gong)(gong)藝(yi)(yi)和(he)設(she)(she)備，燃料也擴大為煤、焦炭、重油(you)或液(ye)化(hua)氣等。

生(sheng)(sheng)石(shi)(shi)(shi)灰污水治理(li)(li)(li)已成(cheng)為關乎經濟社(she)會和(he)(he)諧發展(zhan)的一(yi)項重(zhong)大(da)(da)問(wen)題。在控制工(gong)(gong)(gong)業污染物排(pai)放(fang)量的增長方(fang)面，國(guo)家采取嚴格措施，生(sheng)(sheng)石(shi)(shi)(shi)灰對造(zao)紙、釀(niang)造(zao)、化(hua)工(gong)(gong)(gong)、印染行(xing)業，加大(da)(da)治理(li)(li)(li)和(he)(he)改造(zao)力(li)度，淘汰(tai)高(gao)(gao)耗水、重(zhong)污染的落后工(gong)(gong)(gong)藝和(he)(he)設備。我國(guo)工(gong)(gong)(gong)業化(hua)和(he)(he)城市化(hua)進程不斷推(tui)進，生(sheng)(sheng)石(shi)(shi)(shi)灰工(gong)(gong)(gong)業廢水和(he)(he)城市污水排(pai)放(fang)量逐年增加，因不達標排(pai)放(fang)給環境造(zao)成(cheng)了巨大(da)(da)壓(ya)力(li)和(he)(he)危害，生(sheng)(sheng)石(shi)(shi)(shi)灰在鋼鐵、電力(li)、化(hua)工(gong)(gong)(gong)、煤炭等重(zhong)點行(xing)業、推(tui)廣廢水循環利用(yong)(yong)，提(ti)高(gao)(gao)工(gong)(gong)(gong)業用(yong)(yong)水重(zhong)復利用(yong)(yong)率。同時，生(sheng)(sheng)石(shi)(shi)(shi)灰工(gong)(gong)(gong)業廢水處理(li)(li)(li)工(gong)(gong)(gong)藝、技術(shu)不斷提(ti)高(gao)(gao)，生(sheng)(sheng)石(shi)(shi)(shi)灰給水處理(li)(li)(li)絮凝劑也提(ti)出了新的要求(qiu)。