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)產工藝：　原始的(de)(de)石(shi)(shi)(shi)灰(hui)生(sheng)產工藝是將石(shi)(shi)(shi)灰(hui)石(shi)(shi)(shi)與燃料（木(mu)材）分層鋪(pu)放，引火煅燒一周即得。現代則采用(yong)機械(xie)化、半機械(xie)化立窯(yao)(yao)以及回轉(zhuan)窯(yao)(yao)、沸騰爐等設備進行生(sheng)產。煅燒時間也(ye)相應地(di)縮短(duan)，用(yong)回轉(zhuan)窯(yao)(yao)生(sheng)產石(shi)(shi)(shi)灰(hui)僅需2～4小時，比用(yong)立窯(yao)(yao)生(sheng)產可提高(gao)生(sheng)產效率5倍(bei)以上。近年(nian)來(lai)，又出現了橫流式、雙(shuang)斜坡式及燒油環(huan)行立窯(yao)(yao)和(he)帶預(yu)熱器的(de)(de)短(duan)回轉(zhuan)窯(yao)(yao)等節(jie)能效果顯著的(de)(de)工藝和(he)設備，燃料也(ye)擴大為煤、焦炭、重油或液(ye)化氣等。

生(sheng)(sheng)(sheng)(sheng)石灰(hui)污(wu)(wu)水(shui)治(zhi)理(li)(li)已成(cheng)為(wei)關(guan)乎(hu)經(jing)濟社會和(he)諧發展(zhan)的(de)(de)(de)一項重(zhong)(zhong)(zhong)(zhong)大問題。在控(kong)制工(gong)(gong)業污(wu)(wu)染物排放(fang)量(liang)的(de)(de)(de)增(zeng)長方面，國(guo)家采取(qu)嚴格措(cuo)施，生(sheng)(sheng)(sheng)(sheng)石灰(hui)對造紙、釀造、化工(gong)(gong)、印染行業，加大治(zhi)理(li)(li)和(he)改造力度，淘汰高耗(hao)水(shui)、重(zhong)(zhong)(zhong)(zhong)污(wu)(wu)染的(de)(de)(de)落后工(gong)(gong)藝和(he)設備。我國(guo)工(gong)(gong)業化和(he)城市化進程不斷推進，生(sheng)(sheng)(sheng)(sheng)石灰(hui)工(gong)(gong)業廢(fei)(fei)水(shui)和(he)城市污(wu)(wu)水(shui)排放(fang)量(liang)逐年增(zeng)加，因不達標排放(fang)給環境(jing)造成(cheng)了巨大壓力和(he)危害，生(sheng)(sheng)(sheng)(sheng)石灰(hui)在鋼(gang)鐵、電力、化工(gong)(gong)、煤炭(tan)等重(zhong)(zhong)(zhong)(zhong)點行業、推廣廢(fei)(fei)水(shui)循(xun)環利用(yong)(yong)，提(ti)高工(gong)(gong)業用(yong)(yong)水(shui)重(zhong)(zhong)(zhong)(zhong)復利用(yong)(yong)率(lv)。同時，生(sheng)(sheng)(sheng)(sheng)石灰(hui)工(gong)(gong)業廢(fei)(fei)水(shui)處(chu)理(li)(li)工(gong)(gong)藝、技術(shu)不斷提(ti)高，生(sheng)(sheng)(sheng)(sheng)石灰(hui)給水(shui)處(chu)理(li)(li)絮凝劑(ji)也提(ti)出了新(xin)的(de)(de)(de)要(yao)求。