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)工藝(yi)(yi)：　原始(shi)的(de)石(shi)(shi)灰生(sheng)產(chan)工藝(yi)(yi)是(shi)將石(shi)(shi)灰石(shi)(shi)與燃(ran)(ran)料（木材(cai)）分層鋪放，引火煅(duan)燒(shao)一周即得。現(xian)(xian)代(dai)則采用(yong)(yong)機械化、半機械化立窯(yao)以及(ji)回轉窯(yao)、沸(fei)騰(teng)爐等設(she)備進行生(sheng)產(chan)。煅(duan)燒(shao)時間也相應(ying)地(di)縮短(duan)，用(yong)(yong)回轉窯(yao)生(sheng)產(chan)石(shi)(shi)灰僅需2～4小時，比用(yong)(yong)立窯(yao)生(sheng)產(chan)可提高生(sheng)產(chan)效率5倍以上。近年來，又出現(xian)(xian)了橫(heng)流式、雙(shuang)斜坡(po)式及(ji)燒(shao)油(you)環行立窯(yao)和帶(dai)預熱器的(de)短(duan)回轉窯(yao)等節能(neng)效果顯(xian)著的(de)工藝(yi)(yi)和設(she)備，燃(ran)(ran)料也擴大為煤、焦炭、重油(you)或液化氣等。

生(sheng)石(shi)(shi)灰(hui)(hui)污水(shui)(shui)(shui)(shui)治理(li)已(yi)成(cheng)為關乎經(jing)濟(ji)社(she)會和諧(xie)發展(zhan)的(de)一項重(zhong)(zhong)大(da)問題。在控制(zhi)工(gong)(gong)業(ye)污染物排放(fang)(fang)量(liang)的(de)增長方(fang)面，國家(jia)采取(qu)嚴格措(cuo)施，生(sheng)石(shi)(shi)灰(hui)(hui)對造紙、釀造、化工(gong)(gong)、印(yin)染行業(ye)，加(jia)大(da)治理(li)和改(gai)造力度，淘汰高(gao)(gao)耗(hao)水(shui)(shui)(shui)(shui)、重(zhong)(zhong)污染的(de)落后工(gong)(gong)藝和設備。我國工(gong)(gong)業(ye)化和城(cheng)市化進程不斷(duan)推(tui)進，生(sheng)石(shi)(shi)灰(hui)(hui)工(gong)(gong)業(ye)廢(fei)水(shui)(shui)(shui)(shui)和城(cheng)市污水(shui)(shui)(shui)(shui)排放(fang)(fang)量(liang)逐年增加(jia)，因不達(da)標排放(fang)(fang)給環境造成(cheng)了(le)巨(ju)大(da)壓力和危(wei)害，生(sheng)石(shi)(shi)灰(hui)(hui)在鋼(gang)鐵、電力、化工(gong)(gong)、煤炭等重(zhong)(zhong)點(dian)行業(ye)、推(tui)廣廢(fei)水(shui)(shui)(shui)(shui)循環利(li)用(yong)，提(ti)高(gao)(gao)工(gong)(gong)業(ye)用(yong)水(shui)(shui)(shui)(shui)重(zhong)(zhong)復利(li)用(yong)率。同(tong)時，生(sheng)石(shi)(shi)灰(hui)(hui)工(gong)(gong)業(ye)廢(fei)水(shui)(shui)(shui)(shui)處(chu)理(li)工(gong)(gong)藝、技術(shu)不斷(duan)提(ti)高(gao)(gao)，生(sheng)石(shi)(shi)灰(hui)(hui)給水(shui)(shui)(shui)(shui)處(chu)理(li)絮凝劑也提(ti)出(chu)了(le)新的(de)要(yao)求(qiu)。