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)產(chan)(chan)(chan)(chan)工(gong)藝：　原始的石(shi)灰(hui)生(sheng)產(chan)(chan)(chan)(chan)工(gong)藝是將石(shi)灰(hui)石(shi)與燃料（木材）分層鋪放，引火煅(duan)燒(shao)一(yi)周即得。現(xian)代則(ze)采用機械化(hua)、半機械化(hua)立(li)(li)窯(yao)(yao)(yao)以及(ji)回(hui)轉窯(yao)(yao)(yao)、沸騰爐(lu)等設備(bei)進行生(sheng)產(chan)(chan)(chan)(chan)。煅(duan)燒(shao)時間(jian)也(ye)相應地縮短，用回(hui)轉窯(yao)(yao)(yao)生(sheng)產(chan)(chan)(chan)(chan)石(shi)灰(hui)僅需2～4小時，比用立(li)(li)窯(yao)(yao)(yao)生(sheng)產(chan)(chan)(chan)(chan)可提(ti)高生(sheng)產(chan)(chan)(chan)(chan)效率5倍(bei)以上。近年來，又出現(xian)了(le)橫流式(shi)、雙斜坡(po)式(shi)及(ji)燒(shao)油環行立(li)(li)窯(yao)(yao)(yao)和帶(dai)預熱器的短回(hui)轉窯(yao)(yao)(yao)等節(jie)能效果顯著的工(gong)藝和設備(bei)，燃料也(ye)擴大為煤、焦炭、重(zhong)油或液(ye)化(hua)氣等。

生(sheng)(sheng)(sheng)石灰(hui)污水(shui)治理已成(cheng)(cheng)為(wei)關乎經(jing)濟社會和諧發展的(de)一(yi)項重大(da)問題。在控(kong)制工(gong)(gong)業(ye)(ye)(ye)污染(ran)(ran)物排(pai)放量的(de)增(zeng)長方面，國家采取嚴格措施，生(sheng)(sheng)(sheng)石灰(hui)對造(zao)紙、釀造(zao)、化(hua)工(gong)(gong)、印(yin)染(ran)(ran)行(xing)業(ye)(ye)(ye)，加大(da)治理和改造(zao)力度(du)，淘汰(tai)高(gao)耗(hao)水(shui)、重污染(ran)(ran)的(de)落后(hou)工(gong)(gong)藝和設備。我國工(gong)(gong)業(ye)(ye)(ye)化(hua)和城市(shi)化(hua)進(jin)程(cheng)不(bu)斷推進(jin)，生(sheng)(sheng)(sheng)石灰(hui)工(gong)(gong)業(ye)(ye)(ye)廢(fei)水(shui)和城市(shi)污水(shui)排(pai)放量逐年增(zeng)加，因不(bu)達標排(pai)放給環境造(zao)成(cheng)(cheng)了(le)巨大(da)壓(ya)力和危害，生(sheng)(sheng)(sheng)石灰(hui)在鋼鐵、電力、化(hua)工(gong)(gong)、煤炭等重點(dian)行(xing)業(ye)(ye)(ye)、推廣廢(fei)水(shui)循環利(li)用，提高(gao)工(gong)(gong)業(ye)(ye)(ye)用水(shui)重復利(li)用率。同(tong)時，生(sheng)(sheng)(sheng)石灰(hui)工(gong)(gong)業(ye)(ye)(ye)廢(fei)水(shui)處理工(gong)(gong)藝、技術不(bu)斷提高(gao)，生(sheng)(sheng)(sheng)石灰(hui)給水(shui)處理絮(xu)凝劑也提出了(le)新的(de)要求。