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)(chan)(chan)工藝：　原始的石灰(hui)生(sheng)(sheng)產(chan)(chan)(chan)工藝是將石灰(hui)石與燃料（木材）分層鋪放(fang)，引火煅燒一周即得(de)。現代則采(cai)用機械(xie)化、半機械(xie)化立窯(yao)以及回轉窯(yao)、沸騰爐(lu)等(deng)設備(bei)進(jin)行生(sheng)(sheng)產(chan)(chan)(chan)。煅燒時(shi)間也相應地縮短(duan)，用回轉窯(yao)生(sheng)(sheng)產(chan)(chan)(chan)石灰(hui)僅需2～4小時(shi)，比用立窯(yao)生(sheng)(sheng)產(chan)(chan)(chan)可提高(gao)生(sheng)(sheng)產(chan)(chan)(chan)效率5倍以上。近年來，又出現了橫流式、雙斜(xie)坡式及燒油環(huan)行立窯(yao)和帶預熱器(qi)的短(duan)回轉窯(yao)等(deng)節能(neng)效果顯著的工藝和設備(bei)，燃料也擴大為煤、焦炭、重油或(huo)液化氣等(deng)。

生石(shi)(shi)灰(hui)(hui)污(wu)水治理(li)(li)(li)已成為關乎經濟社會和(he)(he)諧發(fa)展的一(yi)項(xiang)重(zhong)大(da)問題。在(zai)控制工(gong)(gong)(gong)業(ye)(ye)污(wu)染物排放量(liang)的增長方面，國家采取(qu)嚴(yan)格措施，生石(shi)(shi)灰(hui)(hui)對(dui)造紙、釀造、化(hua)(hua)(hua)工(gong)(gong)(gong)、印(yin)染行(xing)業(ye)(ye)，加大(da)治理(li)(li)(li)和(he)(he)改(gai)造力度(du)，淘(tao)汰高耗(hao)水、重(zhong)污(wu)染的落后工(gong)(gong)(gong)藝和(he)(he)設備(bei)。我國工(gong)(gong)(gong)業(ye)(ye)化(hua)(hua)(hua)和(he)(he)城(cheng)市化(hua)(hua)(hua)進程不(bu)斷推進，生石(shi)(shi)灰(hui)(hui)工(gong)(gong)(gong)業(ye)(ye)廢水和(he)(he)城(cheng)市污(wu)水排放量(liang)逐年增加，因(yin)不(bu)達(da)標排放給環(huan)境造成了巨大(da)壓力和(he)(he)危害，生石(shi)(shi)灰(hui)(hui)在(zai)鋼鐵、電力、化(hua)(hua)(hua)工(gong)(gong)(gong)、煤炭(tan)等重(zhong)點行(xing)業(ye)(ye)、推廣廢水循環(huan)利用(yong)，提高工(gong)(gong)(gong)業(ye)(ye)用(yong)水重(zhong)復利用(yong)率。同時(shi)，生石(shi)(shi)灰(hui)(hui)工(gong)(gong)(gong)業(ye)(ye)廢水處理(li)(li)(li)工(gong)(gong)(gong)藝、技術不(bu)斷提高，生石(shi)(shi)灰(hui)(hui)給水處理(li)(li)(li)絮凝劑(ji)也提出了新的要求。