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)灰(hui)生(sheng)(sheng)(sheng)產工藝(yi)是將石(shi)灰(hui)石(shi)與燃(ran)(ran)料(liao)(liao)（木材(cai)）分層鋪放，引火煅燒一周即得(de)。現(xian)代則采用機(ji)械(xie)化(hua)(hua)、半機(ji)械(xie)化(hua)(hua)立窯(yao)(yao)以及回轉(zhuan)窯(yao)(yao)、沸騰爐等設(she)備進行生(sheng)(sheng)(sheng)產。煅燒時(shi)間也相應(ying)地(di)縮(suo)短，用回轉(zhuan)窯(yao)(yao)生(sheng)(sheng)(sheng)產石(shi)灰(hui)僅需2～4小時(shi)，比用立窯(yao)(yao)生(sheng)(sheng)(sheng)產可提高生(sheng)(sheng)(sheng)產效率(lv)5倍以上(shang)。近(jin)年(nian)來，又出現(xian)了橫流式、雙斜坡式及燒油環行立窯(yao)(yao)和(he)帶預熱器的短回轉(zhuan)窯(yao)(yao)等節能(neng)效果顯著的工藝(yi)和(he)設(she)備，燃(ran)(ran)料(liao)(liao)也擴大(da)為(wei)煤、焦炭、重油或液化(hua)(hua)氣(qi)等。

生(sheng)石(shi)灰污水(shui)(shui)治(zhi)理(li)已成為關乎經濟(ji)社會和諧發展的一項重(zhong)大問題(ti)。在(zai)控制(zhi)工(gong)(gong)(gong)業(ye)污染(ran)物排放(fang)量的增長(chang)方面，國(guo)家(jia)采取嚴格(ge)措施，生(sheng)石(shi)灰對造紙、釀造、化工(gong)(gong)(gong)、印染(ran)行業(ye)，加大治(zhi)理(li)和改造力度(du)，淘汰高耗水(shui)(shui)、重(zhong)污染(ran)的落后工(gong)(gong)(gong)藝(yi)和設備。我國(guo)工(gong)(gong)(gong)業(ye)化和城(cheng)市(shi)化進程不(bu)斷推(tui)進，生(sheng)石(shi)灰工(gong)(gong)(gong)業(ye)廢(fei)(fei)水(shui)(shui)和城(cheng)市(shi)污水(shui)(shui)排放(fang)量逐年增加，因不(bu)達標(biao)排放(fang)給環境造成了(le)巨大壓力和危害，生(sheng)石(shi)灰在(zai)鋼鐵(tie)、電力、化工(gong)(gong)(gong)、煤炭等重(zhong)點(dian)行業(ye)、推(tui)廣廢(fei)(fei)水(shui)(shui)循環利(li)用，提高工(gong)(gong)(gong)業(ye)用水(shui)(shui)重(zhong)復(fu)利(li)用率。同(tong)時，生(sheng)石(shi)灰工(gong)(gong)(gong)業(ye)廢(fei)(fei)水(shui)(shui)處(chu)理(li)工(gong)(gong)(gong)藝(yi)、技術不(bu)斷提高，生(sheng)石(shi)灰給水(shui)(shui)處(chu)理(li)絮(xu)凝劑也(ye)提出(chu)了(le)新的要求。