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)工藝：　原(yuan)始的(de)(de)石(shi)(shi)灰生(sheng)(sheng)產(chan)工藝是將石(shi)(shi)灰石(shi)(shi)與(yu)燃料（木材）分層鋪放，引火煅燒一周(zhou)即得。現代則(ze)采(cai)用機械化、半機械化立(li)窯以(yi)及回(hui)轉窯、沸騰爐等設備進行生(sheng)(sheng)產(chan)。煅燒時(shi)間(jian)也相(xiang)應地縮短(duan)，用回(hui)轉窯生(sheng)(sheng)產(chan)石(shi)(shi)灰僅需2～4小時(shi)，比(bi)用立(li)窯生(sheng)(sheng)產(chan)可提高(gao)生(sheng)(sheng)產(chan)效率5倍以(yi)上。近年來，又出現了橫流式、雙斜坡式及燒油環行立(li)窯和(he)帶預熱器(qi)的(de)(de)短(duan)回(hui)轉窯等節能效果顯(xian)著(zhu)的(de)(de)工藝和(he)設備，燃料也擴大(da)為(wei)煤、焦炭、重油或液化氣(qi)等。

生(sheng)(sheng)石灰(hui)污水(shui)(shui)治理已成(cheng)為關(guan)乎經(jing)濟社會和(he)諧發(fa)展(zhan)的(de)一項重(zhong)(zhong)(zhong)大(da)問題。在控制工(gong)(gong)(gong)業(ye)(ye)(ye)污染(ran)物排(pai)放(fang)(fang)量的(de)增(zeng)長方面(mian)，國家(jia)采取(qu)嚴格措施，生(sheng)(sheng)石灰(hui)對造紙、釀造、化(hua)工(gong)(gong)(gong)、印(yin)染(ran)行業(ye)(ye)(ye)，加大(da)治理和(he)改造力(li)度，淘(tao)汰高(gao)耗水(shui)(shui)、重(zhong)(zhong)(zhong)污染(ran)的(de)落后工(gong)(gong)(gong)藝和(he)設(she)備。我國工(gong)(gong)(gong)業(ye)(ye)(ye)化(hua)和(he)城市化(hua)進(jin)(jin)程不(bu)斷推進(jin)(jin)，生(sheng)(sheng)石灰(hui)工(gong)(gong)(gong)業(ye)(ye)(ye)廢水(shui)(shui)和(he)城市污水(shui)(shui)排(pai)放(fang)(fang)量逐年增(zeng)加，因不(bu)達(da)標(biao)排(pai)放(fang)(fang)給環境造成(cheng)了(le)巨大(da)壓力(li)和(he)危(wei)害，生(sheng)(sheng)石灰(hui)在鋼鐵、電力(li)、化(hua)工(gong)(gong)(gong)、煤(mei)炭(tan)等(deng)重(zhong)(zhong)(zhong)點行業(ye)(ye)(ye)、推廣廢水(shui)(shui)循(xun)環利用(yong)(yong)(yong)，提高(gao)工(gong)(gong)(gong)業(ye)(ye)(ye)用(yong)(yong)(yong)水(shui)(shui)重(zhong)(zhong)(zhong)復(fu)利用(yong)(yong)(yong)率。同(tong)時，生(sheng)(sheng)石灰(hui)工(gong)(gong)(gong)業(ye)(ye)(ye)廢水(shui)(shui)處理工(gong)(gong)(gong)藝、技術不(bu)斷提高(gao)，生(sheng)(sheng)石灰(hui)給水(shui)(shui)處理絮凝(ning)劑也提出了(le)新的(de)要求。