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。

生產(chan)工(gong)藝：　原始(shi)的(de)石(shi)灰生產(chan)工(gong)藝是將石(shi)灰石(shi)與燃料（木材）分層鋪放，引火煅燒(shao)一周(zhou)即(ji)得。現(xian)代則采用機械(xie)化(hua)、半機械(xie)化(hua)立窯(yao)以及(ji)回轉(zhuan)窯(yao)、沸騰爐等(deng)設備進行生產(chan)。煅燒(shao)時間(jian)也相應(ying)地縮短(duan)，用回轉(zhuan)窯(yao)生產(chan)石(shi)灰僅(jin)需(xu)2～4小時，比用立窯(yao)生產(chan)可提高(gao)生產(chan)效(xiao)率5倍以上。近年來，又出現(xian)了橫流(liu)式、雙斜坡式及(ji)燒(shao)油環(huan)行立窯(yao)和(he)(he)帶預熱器的(de)短(duan)回轉(zhuan)窯(yao)等(deng)節能(neng)效(xiao)果顯著的(de)工(gong)藝和(he)(he)設備，燃料也擴大為煤、焦炭、重油或(huo)液化(hua)氣等(deng)。

生(sheng)(sheng)石(shi)灰污(wu)水(shui)(shui)治理(li)(li)已成(cheng)為關乎經濟社會和(he)(he)諧發展的一項重(zhong)(zhong)大問題。在控制工(gong)(gong)(gong)業(ye)污(wu)染(ran)物(wu)排放量的增(zeng)長方面(mian)，國家采取嚴格措(cuo)施(shi)，生(sheng)(sheng)石(shi)灰對造紙、釀造、化(hua)工(gong)(gong)(gong)、印染(ran)行業(ye)，加大治理(li)(li)和(he)(he)改造力度，淘汰高耗水(shui)(shui)、重(zhong)(zhong)污(wu)染(ran)的落后(hou)工(gong)(gong)(gong)藝和(he)(he)設備。我國工(gong)(gong)(gong)業(ye)化(hua)和(he)(he)城市(shi)化(hua)進程不(bu)斷(duan)推(tui)(tui)進，生(sheng)(sheng)石(shi)灰工(gong)(gong)(gong)業(ye)廢(fei)水(shui)(shui)和(he)(he)城市(shi)污(wu)水(shui)(shui)排放量逐(zhu)年增(zeng)加，因(yin)不(bu)達標排放給(gei)環(huan)境(jing)造成(cheng)了(le)巨大壓力和(he)(he)危害，生(sheng)(sheng)石(shi)灰在鋼(gang)鐵、電力、化(hua)工(gong)(gong)(gong)、煤炭等重(zhong)(zhong)點行業(ye)、推(tui)(tui)廣廢(fei)水(shui)(shui)循環(huan)利用(yong)，提(ti)高工(gong)(gong)(gong)業(ye)用(yong)水(shui)(shui)重(zhong)(zhong)復(fu)利用(yong)率。同(tong)時，生(sheng)(sheng)石(shi)灰工(gong)(gong)(gong)業(ye)廢(fei)水(shui)(shui)處理(li)(li)工(gong)(gong)(gong)藝、技術不(bu)斷(duan)提(ti)高，生(sheng)(sheng)石(shi)灰給(gei)水(shui)(shui)處理(li)(li)絮凝劑也(ye)提(ti)出了(le)新的要求(qiu)。