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)產工(gong)藝：　原始的石灰生(sheng)(sheng)產工(gong)藝是將石灰石與(yu)燃(ran)料(liao)（木材）分層(ceng)鋪(pu)放，引(yin)火煅燒(shao)一周即得。現代則采用(yong)機械化(hua)、半機械化(hua)立(li)(li)窯(yao)以及回(hui)轉窯(yao)、沸(fei)騰(teng)爐(lu)等設(she)備進(jin)行(xing)生(sheng)(sheng)產。煅燒(shao)時間也相應地縮短(duan)，用(yong)回(hui)轉窯(yao)生(sheng)(sheng)產石灰僅需2～4小時，比用(yong)立(li)(li)窯(yao)生(sheng)(sheng)產可提高生(sheng)(sheng)產效率5倍以上。近年(nian)來，又出現了橫流式、雙斜坡式及燒(shao)油(you)環行(xing)立(li)(li)窯(yao)和帶預(yu)熱器(qi)的短(duan)回(hui)轉窯(yao)等節(jie)能效果顯著的工(gong)藝和設(she)備，燃(ran)料(liao)也擴大(da)為煤、焦炭(tan)、重油(you)或液化(hua)氣等。

生(sheng)(sheng)石(shi)(shi)(shi)灰(hui)污水(shui)治理(li)(li)已成為(wei)關乎經濟社會(hui)和諧(xie)發展的(de)一(yi)項重(zhong)(zhong)大(da)問題。在(zai)控(kong)制工(gong)(gong)(gong)業(ye)污染(ran)(ran)物(wu)排(pai)(pai)放量的(de)增長方面，國(guo)家采取嚴格(ge)措施，生(sheng)(sheng)石(shi)(shi)(shi)灰(hui)對造(zao)紙、釀造(zao)、化(hua)(hua)工(gong)(gong)(gong)、印(yin)染(ran)(ran)行(xing)業(ye)，加大(da)治理(li)(li)和改造(zao)力度，淘汰高耗水(shui)、重(zhong)(zhong)污染(ran)(ran)的(de)落后工(gong)(gong)(gong)藝(yi)和設備。我國(guo)工(gong)(gong)(gong)業(ye)化(hua)(hua)和城市化(hua)(hua)進程(cheng)不斷(duan)推進，生(sheng)(sheng)石(shi)(shi)(shi)灰(hui)工(gong)(gong)(gong)業(ye)廢水(shui)和城市污水(shui)排(pai)(pai)放量逐年增加，因不達標排(pai)(pai)放給環(huan)境造(zao)成了巨大(da)壓力和危害，生(sheng)(sheng)石(shi)(shi)(shi)灰(hui)在(zai)鋼鐵(tie)、電力、化(hua)(hua)工(gong)(gong)(gong)、煤(mei)炭等重(zhong)(zhong)點行(xing)業(ye)、推廣(guang)廢水(shui)循環(huan)利用(yong)，提(ti)高工(gong)(gong)(gong)業(ye)用(yong)水(shui)重(zhong)(zhong)復利用(yong)率(lv)。同時，生(sheng)(sheng)石(shi)(shi)(shi)灰(hui)工(gong)(gong)(gong)業(ye)廢水(shui)處(chu)理(li)(li)工(gong)(gong)(gong)藝(yi)、技術(shu)不斷(duan)提(ti)高，生(sheng)(sheng)石(shi)(shi)(shi)灰(hui)給水(shui)處(chu)理(li)(li)絮凝劑(ji)也提(ti)出了新(xin)的(de)要求。