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)產工(gong)(gong)藝：　原始的(de)石(shi)灰生(sheng)(sheng)產工(gong)(gong)藝是將石(shi)灰石(shi)與燃料（木材）分層鋪(pu)放(fang)，引火煅燒一周即得。現代(dai)則采用(yong)機械(xie)化、半(ban)機械(xie)化立(li)(li)窯以(yi)及回轉窯、沸騰爐等(deng)設備進行(xing)生(sheng)(sheng)產。煅燒時間(jian)也(ye)相應(ying)地縮短(duan)，用(yong)回轉窯生(sheng)(sheng)產石(shi)灰僅需2～4小時，比用(yong)立(li)(li)窯生(sheng)(sheng)產可(ke)提高生(sheng)(sheng)產效(xiao)率5倍以(yi)上。近年來，又出現了橫(heng)流式(shi)、雙斜坡式(shi)及燒油環(huan)行(xing)立(li)(li)窯和帶預熱器的(de)短(duan)回轉窯等(deng)節能(neng)效(xiao)果顯著的(de)工(gong)(gong)藝和設備，燃料也(ye)擴(kuo)大為煤、焦炭(tan)、重油或液化氣(qi)等(deng)。

生(sheng)石(shi)灰(hui)(hui)污(wu)水(shui)治理(li)已成為關乎(hu)經(jing)濟社(she)會和(he)(he)(he)(he)諧發(fa)展的(de)一項重大問題(ti)。在控(kong)制工(gong)(gong)(gong)(gong)業污(wu)染物排(pai)放(fang)量的(de)增長方面，國(guo)家采取嚴格(ge)措施(shi)，生(sheng)石(shi)灰(hui)(hui)對造(zao)紙(zhi)、釀造(zao)、化工(gong)(gong)(gong)(gong)、印(yin)染行(xing)業，加大治理(li)和(he)(he)(he)(he)改造(zao)力度，淘(tao)汰高(gao)耗(hao)水(shui)、重污(wu)染的(de)落后工(gong)(gong)(gong)(gong)藝(yi)(yi)和(he)(he)(he)(he)設備。我國(guo)工(gong)(gong)(gong)(gong)業化和(he)(he)(he)(he)城(cheng)市(shi)化進(jin)程不(bu)斷(duan)推(tui)(tui)進(jin)，生(sheng)石(shi)灰(hui)(hui)工(gong)(gong)(gong)(gong)業廢水(shui)和(he)(he)(he)(he)城(cheng)市(shi)污(wu)水(shui)排(pai)放(fang)量逐年增加，因不(bu)達標排(pai)放(fang)給環境造(zao)成了巨大壓力和(he)(he)(he)(he)危害(hai)，生(sheng)石(shi)灰(hui)(hui)在鋼鐵(tie)、電力、化工(gong)(gong)(gong)(gong)、煤炭等(deng)重點行(xing)業、推(tui)(tui)廣廢水(shui)循(xun)環利用，提(ti)高(gao)工(gong)(gong)(gong)(gong)業用水(shui)重復利用率。同時，生(sheng)石(shi)灰(hui)(hui)工(gong)(gong)(gong)(gong)業廢水(shui)處(chu)理(li)工(gong)(gong)(gong)(gong)藝(yi)(yi)、技術不(bu)斷(duan)提(ti)高(gao)，生(sheng)石(shi)灰(hui)(hui)給水(shui)處(chu)理(li)絮(xu)凝(ning)劑也提(ti)出了新的(de)要求。