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(chan)(chan)工藝(yi)：　原始(shi)的(de)石(shi)灰生(sheng)(sheng)產(chan)(chan)工藝(yi)是將石(shi)灰石(shi)與燃(ran)(ran)料（木材(cai)）分層鋪放(fang)，引火(huo)煅燒一周即得。現(xian)代則(ze)采用(yong)機(ji)械化(hua)(hua)(hua)、半(ban)機(ji)械化(hua)(hua)(hua)立窯以(yi)及回轉(zhuan)(zhuan)窯、沸騰爐(lu)等(deng)(deng)設(she)備進(jin)行生(sheng)(sheng)產(chan)(chan)。煅燒時間也相應地縮(suo)短，用(yong)回轉(zhuan)(zhuan)窯生(sheng)(sheng)產(chan)(chan)石(shi)灰僅需2～4小(xiao)時，比用(yong)立窯生(sheng)(sheng)產(chan)(chan)可(ke)提高(gao)生(sheng)(sheng)產(chan)(chan)效率(lv)5倍以(yi)上。近年(nian)來，又出(chu)現(xian)了橫流式、雙(shuang)斜(xie)坡式及燒油環行立窯和帶(dai)預熱器的(de)短回轉(zhuan)(zhuan)窯等(deng)(deng)節能效果顯著的(de)工藝(yi)和設(she)備，燃(ran)(ran)料也擴大為煤、焦炭、重油或(huo)液化(hua)(hua)(hua)氣等(deng)(deng)。

生(sheng)石(shi)(shi)(shi)灰(hui)(hui)污(wu)水(shui)(shui)(shui)治(zhi)理已成為關乎經濟社會和諧發展的一項(xiang)重(zhong)大(da)問題。在控制工(gong)(gong)業(ye)污(wu)染(ran)物排(pai)(pai)放量的增長方(fang)面，國家采取(qu)嚴格措施，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)對造(zao)(zao)(zao)紙、釀造(zao)(zao)(zao)、化(hua)工(gong)(gong)、印染(ran)行(xing)業(ye)，加大(da)治(zhi)理和改造(zao)(zao)(zao)力(li)度，淘汰高(gao)耗水(shui)(shui)(shui)、重(zhong)污(wu)染(ran)的落后(hou)工(gong)(gong)藝和設備。我國工(gong)(gong)業(ye)化(hua)和城市(shi)化(hua)進程不(bu)(bu)斷推(tui)進，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)工(gong)(gong)業(ye)廢(fei)水(shui)(shui)(shui)和城市(shi)污(wu)水(shui)(shui)(shui)排(pai)(pai)放量逐年增加，因不(bu)(bu)達標排(pai)(pai)放給環(huan)境造(zao)(zao)(zao)成了巨大(da)壓力(li)和危害(hai)，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)在鋼鐵、電(dian)力(li)、化(hua)工(gong)(gong)、煤(mei)炭等重(zhong)點行(xing)業(ye)、推(tui)廣廢(fei)水(shui)(shui)(shui)循環(huan)利用(yong)，提高(gao)工(gong)(gong)業(ye)用(yong)水(shui)(shui)(shui)重(zhong)復(fu)利用(yong)率。同時，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)工(gong)(gong)業(ye)廢(fei)水(shui)(shui)(shui)處理工(gong)(gong)藝、技術不(bu)(bu)斷提高(gao)，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)給水(shui)(shui)(shui)處理絮(xu)凝劑也(ye)提出了新的要求。