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)(sheng)產(chan)工藝：　原始的(de)石(shi)灰生(sheng)(sheng)(sheng)產(chan)工藝是將(jiang)石(shi)灰石(shi)與(yu)燃(ran)料(liao)(liao)（木材(cai)）分(fen)層鋪放，引火(huo)煅(duan)燒一周即得(de)。現代則采用機械(xie)化、半機械(xie)化立窯(yao)以及(ji)回(hui)(hui)轉(zhuan)(zhuan)窯(yao)、沸(fei)騰爐(lu)等(deng)設(she)備進行(xing)生(sheng)(sheng)(sheng)產(chan)。煅(duan)燒時間也相應(ying)地縮短，用回(hui)(hui)轉(zhuan)(zhuan)窯(yao)生(sheng)(sheng)(sheng)產(chan)石(shi)灰僅需2～4小時，比用立窯(yao)生(sheng)(sheng)(sheng)產(chan)可提高(gao)生(sheng)(sheng)(sheng)產(chan)效率5倍(bei)以上(shang)。近年來，又出現了橫流式、雙斜坡式及(ji)燒油環行(xing)立窯(yao)和帶預熱器的(de)短回(hui)(hui)轉(zhuan)(zhuan)窯(yao)等(deng)節能效果(guo)顯著的(de)工藝和設(she)備，燃(ran)料(liao)(liao)也擴大為煤、焦炭(tan)、重油或液化氣等(deng)。

生石(shi)(shi)灰(hui)污(wu)水(shui)(shui)治理已成(cheng)(cheng)為關乎(hu)經濟(ji)社會和諧發展的一項(xiang)重大問題。在(zai)控制工(gong)(gong)(gong)業(ye)(ye)污(wu)染物排放量(liang)的增長(chang)方面，國家采(cai)取嚴格措施，生石(shi)(shi)灰(hui)對(dui)造(zao)紙、釀造(zao)、化工(gong)(gong)(gong)、印染行(xing)業(ye)(ye)，加(jia)大治理和改造(zao)力度，淘汰高(gao)(gao)耗水(shui)(shui)、重污(wu)染的落后工(gong)(gong)(gong)藝(yi)和設備。我國工(gong)(gong)(gong)業(ye)(ye)化和城市化進程不(bu)斷(duan)推進，生石(shi)(shi)灰(hui)工(gong)(gong)(gong)業(ye)(ye)廢(fei)水(shui)(shui)和城市污(wu)水(shui)(shui)排放量(liang)逐年增加(jia)，因(yin)不(bu)達(da)標排放給環境造(zao)成(cheng)(cheng)了巨(ju)大壓(ya)力和危害，生石(shi)(shi)灰(hui)在(zai)鋼鐵(tie)、電力、化工(gong)(gong)(gong)、煤炭等(deng)重點行(xing)業(ye)(ye)、推廣廢(fei)水(shui)(shui)循環利(li)用(yong)，提高(gao)(gao)工(gong)(gong)(gong)業(ye)(ye)用(yong)水(shui)(shui)重復利(li)用(yong)率。同時，生石(shi)(shi)灰(hui)工(gong)(gong)(gong)業(ye)(ye)廢(fei)水(shui)(shui)處(chu)理工(gong)(gong)(gong)藝(yi)、技術不(bu)斷(duan)提高(gao)(gao)，生石(shi)(shi)灰(hui)給水(shui)(shui)處(chu)理絮凝劑也提出了新(xin)的要求。