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)工藝：　原始的(de)石(shi)灰生(sheng)(sheng)產(chan)工藝是(shi)將石(shi)灰石(shi)與燃(ran)料（木(mu)材）分(fen)層(ceng)鋪放，引火煅燒(shao)一周即得。現代(dai)則采用(yong)機械化(hua)、半機械化(hua)立窯以及(ji)回(hui)轉(zhuan)窯、沸騰爐(lu)等(deng)設備進行生(sheng)(sheng)產(chan)。煅燒(shao)時(shi)間也(ye)相應地縮短，用(yong)回(hui)轉(zhuan)窯生(sheng)(sheng)產(chan)石(shi)灰僅需2～4小時(shi)，比(bi)用(yong)立窯生(sheng)(sheng)產(chan)可提高生(sheng)(sheng)產(chan)效率5倍以上。近年來，又出現了橫流式、雙斜坡(po)式及(ji)燒(shao)油環(huan)行立窯和帶(dai)預(yu)熱器的(de)短回(hui)轉(zhuan)窯等(deng)節能效果顯著的(de)工藝和設備，燃(ran)料也(ye)擴大為煤、焦炭、重油或液化(hua)氣等(deng)。

生石(shi)(shi)灰(hui)(hui)污(wu)水(shui)治(zhi)理已成為關乎(hu)經濟社會(hui)和(he)(he)(he)諧(xie)發展的(de)(de)一項(xiang)重大問題。在控制工(gong)(gong)(gong)(gong)(gong)業(ye)污(wu)染(ran)物排(pai)(pai)放(fang)(fang)量(liang)的(de)(de)增(zeng)長方面，國家(jia)采取嚴格措施，生石(shi)(shi)灰(hui)(hui)對造(zao)紙、釀造(zao)、化(hua)工(gong)(gong)(gong)(gong)(gong)、印染(ran)行業(ye)，加大治(zhi)理和(he)(he)(he)改造(zao)力(li)度，淘汰高耗水(shui)、重污(wu)染(ran)的(de)(de)落后工(gong)(gong)(gong)(gong)(gong)藝和(he)(he)(he)設備。我(wo)國工(gong)(gong)(gong)(gong)(gong)業(ye)化(hua)和(he)(he)(he)城市化(hua)進(jin)(jin)程不斷(duan)推進(jin)(jin)，生石(shi)(shi)灰(hui)(hui)工(gong)(gong)(gong)(gong)(gong)業(ye)廢水(shui)和(he)(he)(he)城市污(wu)水(shui)排(pai)(pai)放(fang)(fang)量(liang)逐年增(zeng)加，因不達標排(pai)(pai)放(fang)(fang)給環(huan)境造(zao)成了(le)巨(ju)大壓(ya)力(li)和(he)(he)(he)危害，生石(shi)(shi)灰(hui)(hui)在鋼鐵(tie)、電力(li)、化(hua)工(gong)(gong)(gong)(gong)(gong)、煤(mei)炭等重點行業(ye)、推廣廢水(shui)循環(huan)利(li)用(yong)，提高工(gong)(gong)(gong)(gong)(gong)業(ye)用(yong)水(shui)重復(fu)利(li)用(yong)率(lv)。同(tong)時(shi)，生石(shi)(shi)灰(hui)(hui)工(gong)(gong)(gong)(gong)(gong)業(ye)廢水(shui)處理工(gong)(gong)(gong)(gong)(gong)藝、技(ji)術(shu)不斷(duan)提高，生石(shi)(shi)灰(hui)(hui)給水(shui)處理絮(xu)凝劑也(ye)提出(chu)了(le)新的(de)(de)要(yao)求。