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)產工藝(yi)：　原始的石(shi)(shi)(shi)灰生(sheng)(sheng)(sheng)產工藝(yi)是將石(shi)(shi)(shi)灰石(shi)(shi)(shi)與燃料（木材）分(fen)層鋪放，引火煅(duan)燒(shao)一周即得。現代則采用(yong)機械(xie)化(hua)、半機械(xie)化(hua)立窯以及回(hui)轉(zhuan)(zhuan)窯、沸騰(teng)爐等(deng)設(she)備進(jin)行生(sheng)(sheng)(sheng)產。煅(duan)燒(shao)時(shi)間也相(xiang)應地縮(suo)短(duan)，用(yong)回(hui)轉(zhuan)(zhuan)窯生(sheng)(sheng)(sheng)產石(shi)(shi)(shi)灰僅需2～4小(xiao)時(shi)，比(bi)用(yong)立窯生(sheng)(sheng)(sheng)產可提(ti)高生(sheng)(sheng)(sheng)產效率5倍(bei)以上。近(jin)年(nian)來，又出現了橫(heng)流式、雙斜坡式及燒(shao)油環行立窯和帶(dai)預熱器(qi)的短(duan)回(hui)轉(zhuan)(zhuan)窯等(deng)節(jie)能效果(guo)顯著(zhu)的工藝(yi)和設(she)備，燃料也擴(kuo)大為煤(mei)、焦炭(tan)、重油或液化(hua)氣等(deng)。

生石(shi)灰(hui)(hui)污(wu)水(shui)(shui)治理(li)(li)已成為(wei)關乎經濟社(she)會(hui)和諧發展的一項重(zhong)(zhong)(zhong)大問題。在控(kong)制工(gong)(gong)(gong)業(ye)(ye)(ye)污(wu)染物排(pai)放量(liang)(liang)的增長方(fang)面(mian)，國家(jia)采(cai)取(qu)嚴格(ge)措(cuo)施(shi)，生石(shi)灰(hui)(hui)對造(zao)紙(zhi)、釀造(zao)、化工(gong)(gong)(gong)、印(yin)染行業(ye)(ye)(ye)，加大治理(li)(li)和改造(zao)力(li)度，淘汰高(gao)耗水(shui)(shui)、重(zhong)(zhong)(zhong)污(wu)染的落后工(gong)(gong)(gong)藝和設備。我(wo)國工(gong)(gong)(gong)業(ye)(ye)(ye)化和城市(shi)(shi)化進程(cheng)不斷推進，生石(shi)灰(hui)(hui)工(gong)(gong)(gong)業(ye)(ye)(ye)廢(fei)水(shui)(shui)和城市(shi)(shi)污(wu)水(shui)(shui)排(pai)放量(liang)(liang)逐(zhu)年增加，因(yin)不達標(biao)排(pai)放給(gei)環境造(zao)成了巨大壓(ya)力(li)和危害，生石(shi)灰(hui)(hui)在鋼(gang)鐵、電(dian)力(li)、化工(gong)(gong)(gong)、煤炭(tan)等重(zhong)(zhong)(zhong)點行業(ye)(ye)(ye)、推廣廢(fei)水(shui)(shui)循環利用，提(ti)高(gao)工(gong)(gong)(gong)業(ye)(ye)(ye)用水(shui)(shui)重(zhong)(zhong)(zhong)復利用率。同時(shi)，生石(shi)灰(hui)(hui)工(gong)(gong)(gong)業(ye)(ye)(ye)廢(fei)水(shui)(shui)處理(li)(li)工(gong)(gong)(gong)藝、技(ji)術不斷提(ti)高(gao)，生石(shi)灰(hui)(hui)給(gei)水(shui)(shui)處理(li)(li)絮凝劑也(ye)提(ti)出了新的要求。