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)工藝：　原始的石(shi)(shi)灰生(sheng)產(chan)(chan)工藝是將石(shi)(shi)灰石(shi)(shi)與燃料(liao)（木材）分層鋪放，引火煅(duan)燒一周即得。現(xian)代則采用(yong)(yong)機械化、半機械化立(li)窯以及回轉(zhuan)窯、沸騰爐(lu)等(deng)設備進(jin)行生(sheng)產(chan)(chan)。煅(duan)燒時(shi)間也相應(ying)地縮(suo)短，用(yong)(yong)回轉(zhuan)窯生(sheng)產(chan)(chan)石(shi)(shi)灰僅需2～4小(xiao)時(shi)，比用(yong)(yong)立(li)窯生(sheng)產(chan)(chan)可提高生(sheng)產(chan)(chan)效率5倍以上(shang)。近年來，又(you)出(chu)現(xian)了橫流式、雙(shuang)斜坡式及燒油環行立(li)窯和帶預熱(re)器的短回轉(zhuan)窯等(deng)節能效果顯著(zhu)的工藝和設備，燃料(liao)也擴(kuo)大(da)為煤(mei)、焦炭、重油或液(ye)化氣等(deng)。

生(sheng)石(shi)(shi)(shi)灰(hui)(hui)(hui)污水(shui)治理(li)(li)已成為關乎經濟社(she)會和(he)(he)諧發展的(de)一項重(zhong)大(da)問題。在(zai)控制(zhi)工(gong)(gong)(gong)業污染物排放(fang)量(liang)的(de)增(zeng)長(chang)方面，國家采取嚴格措施，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)(hui)對造紙、釀(niang)造、化工(gong)(gong)(gong)、印染行業，加(jia)大(da)治理(li)(li)和(he)(he)改造力(li)度，淘(tao)汰高耗水(shui)、重(zhong)污染的(de)落后工(gong)(gong)(gong)藝(yi)和(he)(he)設備。我國工(gong)(gong)(gong)業化和(he)(he)城市(shi)化進程不斷推進，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)(hui)工(gong)(gong)(gong)業廢水(shui)和(he)(he)城市(shi)污水(shui)排放(fang)量(liang)逐(zhu)年增(zeng)加(jia)，因不達標排放(fang)給(gei)環(huan)境造成了巨大(da)壓力(li)和(he)(he)危害，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)(hui)在(zai)鋼鐵、電力(li)、化工(gong)(gong)(gong)、煤炭等重(zhong)點行業、推廣廢水(shui)循環(huan)利用，提高工(gong)(gong)(gong)業用水(shui)重(zhong)復利用率。同時(shi)，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)(hui)工(gong)(gong)(gong)業廢水(shui)處(chu)理(li)(li)工(gong)(gong)(gong)藝(yi)、技(ji)術不斷提高，生(sheng)石(shi)(shi)(shi)灰(hui)(hui)(hui)給(gei)水(shui)處(chu)理(li)(li)絮凝劑(ji)也提出(chu)了新的(de)要求(qiu)。